58 results about "Beryllium-Copper Alloy" patented technology

The invention discloses a small-diameter beryllium copper microwire for an aviation electric connector and a preparation method of the small-diameter beryllium copper microwire, and belongs to the technical field of beryllium copper alloy. The small-diameter beryllium copper microwire is manufactured through the working procedures of homogenizing annealing, extrusion, hot rolling, annealing, primary acid pickling, stretching, secondary acid pickling, bright continuous solid solution, multi-mode stretching and the like, an oxidation film on the surface of the beryllium copper microwire is eliminated through the acid pickling and bright continuous solid solution working procedures, and the surface quality of the beryllium copper microwire is remarkably improved; the beryllium copper microwire subjected to finished product stretching is bright in surface, free of cracks, scratches and other surface defects and stable in mechanical property, the hard tensile strength of the beryllium copper microwire can reach 1100 MPa or above, and the product consistency is good.

Provided is a hydrogen-resistant material which combines the material strength and fracture toughness required for a structural member that operates in a hydrogen atmosphere, and which does not deteriorate or does not easily deteriorate in the hydrogen atmosphere. The hydrogen-resistant material is used for processing a hydrogen-resistant structural member used for operating in a hydrogen atmosphere, and is composed of a beryllium-copper alloy containing 0.2-2.7 mass% of Be and 0.2-2.5 mass% in total of at least one element selected from the group consisting of Co, Ni and Fe, the remainder being Cu and unavoidable impurities, and the total content of Cu, Be, Co, Ni and Fe being 99.0 mass% or more of the beryllium-copper alloy. The hydrogen-resistant material exhibits a tensile strength of 700 MPa or more, a relative reduction in area (RRA) of 0.80 or more, and a fracture toughness value KIC of 50 MPa.m < 1 / 2 > or more, respectively, in an air atmosphere and a hydrogen atmosphere, respectively, by a low strain rate tensile test in the air atmosphere and the hydrogen atmosphere.

The utility model discloses a loudspeaker single body with a beryllium copper elastic sheet, which comprises a basin frame, U iron is arranged on the basin frame, a magnet is arranged on the U iron, a washer is arranged on the magnet, a voice coil is arranged outside the magnet and the washer, the voice coil is positioned in the basin frame, a vibrating diaphragm is arranged at the top of the basin frame, and the vibrating diaphragm is positioned in the basin frame. The bottom of the voice coil is provided with a metal elastic sheet, and the metal elastic sheet is made of beryllium copper alloy. According to the loudspeaker monomer with the beryllium copper elastic sheet, the conductivity and the rigidity of the metal elastic sheet can be ensured, and the acoustic quality of the loudspeaker monomer cannot be influenced.

The application discloses a high-temperature-resistant beryllium copper alloy for microswitches and a preparation method thereof, and belongs to the technical field of electronic component manufacturing. The alloy composition is as follows in terms of percentage by weight: Be 0.20%-0.50%, Co 1.20%-1.30%, Ni 3.20%-3.50%, W 0.30%-0.50%, Fe 0.12%-0.15%, Zr 0.16%-0.20%, Y 0.12%-0.15%, B 0.010%-0.015%, Pb≤0.003%, Sn≤0.003%, total impurities≤0.01%, and the balance being Cu. The preparation method comprises the following steps: 1280-1300 DEG C. smelting, 1620-1650 DEG C. high-temperature refining, homogenization treatment, hot rolling, annealing, solid solution, twice cold rolling and intermediate annealing, two-stage aging treatment, and finally, a strip with a thickness of 0.5-2.0 mm and an average grain size of 5-7 um is obtained. The obtained product has a yield strength of ≥980 MPa, a tensile strength of ≥1200 MPa, an elongation of ≥5%, and an elastic modulus of ≥115 GPa, and has excellent high-temperature strength, elastic stability and stress relaxation resistance.

The application provides a beryllium copper alloy leftover material recycling and smelting method, and belongs to the technical field of alloy material recycling. The method comprises the following steps: performing hot cleaning on beryllium copper alloy leftover material, and then immersing the beryllium copper alloy leftover material in a metal cleaning solution; laying the immersed beryllium copper alloy leftover material on an iron plate to perform steam airing; wrapping the steam aired beryllium copper alloy leftover material, and then sequentially performing pressing and baking; performing small-power gradual large-power baking on a vacuum smelting furnace; loading the baked beryllium copper alloy leftover material block into the baked vacuum smelting furnace to perform primary vacuum smelting, and sequentially performing refining, casting and solidification to obtain a primary alloy ingot; loading the primary alloy ingot into the vacuum smelting furnace to perform secondary vacuum smelting, and sequentially performing refining, casting, solidification and cast ingot peeling to obtain a secondary alloy round ingot. The application realizes high metal yield, high cast ingot quality and reduced environmental pollution.

A positioning stage for positioning and cooling an electronic device, such as a detector in an electron microscope, is disclosed. The positioning stage includes one or more thermally conductive slidin

This invention discloses a modular, assembled electromagnetic shielding test chamber for electromagnetic shielding testing. During drawer closure, a vertical plate triggers a pry plate to rotate, pushing the plate to press against the intermediate layer, ensuring a tight fit between the beryllium copper alloy anti-leakage layer and the shielding chamber surface. This compensates for the deficiency in shielding effectiveness caused by insufficient contact pressure between the anti-leakage layer and the shielding chamber surface in the top area of ​​the drawer due to large gaps in the shielding chamber. Simultaneously, a built-in thin-film pressure sensor in the intermediate layer monitors the uniformity of the pressing pressure in real time, monitoring the tightness of contact between the anti-leakage layer and the shielding chamber, improving the reliability and efficiency of test results. Through homogenization and adjustment modules, the protrusion of the vertical plate can be flexibly adjusted according to the thinning of the intermediate layer due to aging, ensuring a tight contact between the anti-leakage layer and the shielding chamber surface.

This invention discloses a high-strength, high-conductivity beryllium copper alloy rod for limit switches and its manufacturing method, belonging to the field of electronic component manufacturing technology. Its chemical composition, by weight percentage, includes: Be: 0.10%–0.30%, Co: 0.10%–0.30%, Ni: 0.30%–0.50%, Si: 0.020%–0.040%, Mn: 0.05%–0.10%, Zr: 0.05%–0.10%, Ag: 1.00%–1.20%, RE: 0.0140%–0.0180%, Ag-SiC: 0.80%–1.20%, Cu-CNTs: 0.40%–0.80%, Pb ≤ 0.005%, Sn ≤ 0.005%, other impurity elements ≤ 0.01%, and the balance being Cu. The manufacturing method includes electroless plating of SiC and CNTs with Ag and Cu, respectively, followed by gas atomization powdering, mixing, vacuum hot pressing sintering, hot extrusion, cold drawing, and aging treatment to obtain rods. This invention achieves simultaneous improvement in strength and conductivity through the synergistic effect of low Be and metal cladding reinforcement. The finished product has a yield strength >1050MPa, tensile strength >1200MPa, elongation >4%, and conductivity >40% IACS.

The invention provides a vacuum constant-temperature semi-continuous casting system and method for a beryllium-copper alloy ingot blank, and relates to the technical field of copper alloy casting. The casting system comprises a vacuum furnace, a launder, a crystallizer, a vertical continuous casting dummy ingot mechanism and a heat preservation bag capable of achieving on-line heating and heat preservation functions. The beryllium-copper alloy molten metal is obtained through smelting of a vacuum induction furnace, part of the obtained beryllium-copper alloy molten metal is poured into a launder and drained into a heat preservation bag through the launder, a preset number of beryllium-copper alloy molten metal is stored in the heat preservation bag, and a crystallizer is placed below the heat preservation bag; and a plug rod flow control device is adopted to control the flow of the beryllium copper alloy molten metal flowing into the crystallizer. Constant-temperature casting is achieved, the appearance quality of a cast ingot is good, and the consistency of the internal structure of an ingot blank is better; the chemical component uniformity of the ingot blank is improved, and after the ingot blank is processed, the performance stability of a finished product is also greatly improved; the metal burning loss is reduced, the material transfer temperature is reduced, and the production cost is saved.

The invention discloses a method for preparing a mother alloy for beryllium bronze from beryllium copper residues, and belongs to the technical field of beryllium bronze preparation. The method comprises the following steps: crushing a filter screen bonding material and a furnace bonding material, and screening to obtain particles; the screened particles of the binding material and the binding furnace material are pressed, and blocky beryllium copper residual materials are obtained; the preparation method comprises the following steps: preparing blocky beryllium copper residual materials and electrolytic copper according to a beryllium copper master alloy to be prepared, and then drying; the dried blocky beryllium copper residues and electrolytic copper are put into a crucible of a vacuum induction melting furnace, gradient heating melting is carried out in a vacuum state, and molten metal is obtained; the molten metal is heated, refined and fully stirred, then protective gas is inflated into the vacuum induction melting furnace to reach the atmospheric pressure, and after standing is conducted, dross on the surface of the molten metal is removed; and the molten metal with the scum removed from the surface is cast into a mold, demolding is conducted after natural cooling, and the beryllium-copper master alloy is obtained. The beryllium content of the mother alloy for beryllium bronze is high, and the preparation requirement of the high-beryllium beryllium copper alloy can be met.

The application provides a preparation method of a high-beryllium-content beryllium copper alloy material, which comprises the following steps: melting metal raw materials containing pure copper and a beryllium copper master alloy to obtain an alloy liquid, casting the alloy liquid to obtain an ingot, uniformly treating the ingot to obtain a homogenized casting blank, hot-rolling the homogenized casting blank to obtain a hot-rolled blank, annealing the hot-rolled blank to obtain an annealed blank, performing a cyclic "cold rolling-intermediate annealing" process on the annealed blank, and finally performing finish rolling and product annealing on the alloy strip to prepare the high-beryllium-content beryllium copper alloy material. The method can solve the problems of the second phase component of the high-beryllium-content strip being inconsistent, the strip being cracked, side-bent and wrinkled, and a large number of processing passes in the prior art.

The utility model relates to nut structure device technical field provides a nut structure of anti -loosening, including upper anti -loosening nut, the upper anti -loosening nut inner surface is equipped with upper through -hole, first thread groove, the inner surface of upper through -hole is equipped with, beryllium copper alloy fastening block and pressure chamber contact, the pressure chamber exerts pressure to beryllium copper alloy fastening block surface in the process of rotation, beryllium copper alloy fastening block is deformed to the outside bolt center direction under the pressure of pressure chamber, improve the friction and fastening between second thread groove and the surface thread of outside bolt, reach the effect of anti -loosening, a plurality of compensation incisions on beryllium copper alloy fastening block are beryllium copper alloy fastening block inward deformation reserve space, first friction particle and second friction particle adopt quartz sand material, can significantly increase the friction resistance between pressure chamber and beryllium copper alloy fastening block, upper antiskid sealing pad and lower antiskid sealing pad contact tight pressure, avoid upper anti -loosening nut and lower anti -loosening nut relatively rotate.

The utility model discloses a beryllium copper alloy heat-conducting high-speed extrusion mold, which belongs to the technical field of plastic processing and comprises a mold mounting component, a discharging mold component, an extrusion mold component and a feeding mold component. A discharging die assembly used for limiting the shape during discharging, an extrusion die assembly used for conducting extrusion forming on materials and a feeding die assembly used for feeding are installed on the die installation assembly, and the extrusion die assembly is located between the discharging die assembly and the feeding die assembly. The mold mounting assembly includes a housing member and a locking member. By means of the mode, the discharging die assembly, the extrusion die assembly and the feeding die assembly are limited through the shell component, the feeding die assembly is locked through the locking component, the discharging die assembly, the extrusion die assembly and the feeding die assembly can be more tightly attached when subjected to extrusion force on the left side, and raw materials are prevented from being stressed dispersedly; the structural stability is improved, and the raw material passing speed is increased.

The invention discloses beryllium copper alloy casting forming equipment and a using method thereof, and relates to the technical field of copper alloy casting, the beryllium copper alloy casting forming equipment comprises a smelting furnace, a conveying pipeline, a casting cavity and a melt buffering and pressure stabilizing assembly, an outlet of the smelting furnace communicates with an inlet of the conveying pipeline, and the melt buffering and pressure stabilizing assembly is installed at an outlet of the conveying pipeline through a connecting flange; an outlet of the melt buffering and pressure stabilizing assembly is communicated with a casting cavity sprue, and the melt buffering and pressure stabilizing assembly comprises a buffering cavity, an elastic membrane, a pressure adjusting piston and a reset spring. The molten liquid buffering and pressure stabilizing assembly is installed, so that the functions of dynamic absorption and pressure stabilizing of alloy liquid pressure pulsation are achieved, the problem of pouring turbulence caused by the fact that pressure fluctuation of a smelting furnace is directly transmitted to a cavity is solved, the defects of air holes and slag inclusion are remarkably reduced, and the internal density and mechanical property consistency of castings are improved.

The invention discloses an intelligent smelting furnace for beryllium copper alloy preparation and a using method thereof.The intelligent smelting furnace comprises a furnace shell, a furnace body is embedded in the furnace shell, an induction coil is arranged between the outer wall of the furnace body and the inner wall of the furnace shell, and a uniform module is arranged in the furnace body and comprises a hollow rod, a first arc plate and a second arc plate; a connecting block is embedded into one end of the first arc plate, a second arc plate is connected to the right end of the connecting block, a conical ring is embedded into the left end of the connecting block, and a temperature detection module is arranged in the furnace body. The uniform module is installed, when the temperature stratification phenomenon occurs in the furnace charge heating process, a hollow rod drives an arc plate I and an arc plate II to rotate, then the arc plate II is pushed by a rotating frame to rotate to be in an inclined state, the flowing furnace charge is guided through the arc plate II, the purpose of adjusting the flowing path of the furnace charge is achieved, the furnace charge is uniformly mixed, and the furnace charge heating efficiency is improved. Therefore, the furnace charge temperature is consistent, the phenomenon of uneven heating of the furnace charge is avoided, and the quality of the beryllium copper alloy is improved.

The utility model discloses a novel explosion-proof motor aluminum end cover, which comprises an aluminum end cover body, the aluminum end cover body comprises a base layer, a first heat-resistant layer, a second heat-resistant layer, a first explosion-proof layer, a second explosion-proof layer, a first corrosion-resistant layer and a second corrosion-resistant layer, and the top of the base layer is fixedly connected with the first heat-resistant layer. According to the aluminum end cover, the aluminum end cover body, the base layer, the first heat-resistant layer, the second heat-resistant layer, the first explosion-proof layer, the fluorinated epoxy resin layer, the carbon fiber layer, the beryllium copper alloy layer, the modified polyester resin coating, the second explosion-proof layer, the first corrosion-resistant layer and the second corrosion-resistant layer are matched with one another, so that the explosion-proof performance of the aluminum end cover body is greatly improved, and multiple requirements can be met; the device is high in practicability and worthy of popularization.

The present invention belongs to the technical field of beryllium-free copper alloy materials, and provides an ultra-high-strength conductive copper-titanium alloy and a preparation method thereof. The present invention takes Cu as the matrix, adds Cr and Mg, effectively improves the strength and conductivity of the alloy, Mg is solid-dissolved in the matrix, plays a solid solution strengthening role, Cr and Ti can form Cr2Ti intermetallic compounds, thereby improving the strength and conductivity of the alloy; combined with combined aging treatment, the volume fraction of β-Cu4Ti precipitated phase can be increased while reducing production costs, thereby greatly improving the conductivity of the alloy; combined with hot rolling and cold rolling, it is beneficial to obtain a high-density, uniformly distributed β-Cu4Ti phase, thereby improving the strength and conductivity of the copper-titanium alloy. The results of the embodiment show that the hardness of the ultra-high-strength conductive copper-titanium alloy prepared by the preparation method provided by the present invention can reach 310HV, and the conductivity can reach 35%IACS.

The utility model provides an anti-fatigue low-friction high-frequency response miniature spring for a pneumatic assembly, and relates to the technical field of miniature springs, the anti-fatigue low-friction high-frequency response miniature spring comprises a spring and an upper fixing sleeve, the middle of the outer side surface of the spring is tightly wrapped with a middle leather sheath, the left and right parts of the outer side surface of the spring are tightly wrapped with side leather sheaths, and a reinforcing core is arranged in the center in the spring. The upper portion of the spring is sleeved with an upper fixing sleeve, the lower portion of the spring is sleeved with a lower fixing sleeve, the upper fixing sleeve and the lower fixing sleeve are the same in structure, the thickness size of the middle leather sheath is half of that of the side leather sheath, the middle leather sheath and the side leather sheath are made of silicon rubber materials, the reinforcing core is made of beryllium copper alloy materials, and the reinforcing core is made of aluminum alloy materials. And the cross section of the reinforcing core is of a circular structure. Abrasion is reduced in the back-and-forth rebounding process of the spring, the fatigue resistance is quite high, sleeving is safer and more stable, compression and rebounding are safer and more stable, and the spring is not prone to slipping in the compression process, higher in frequency response and durable.

The invention discloses drying equipment for producing a catalyst by using an impregnation method, and relates to the field of drying equipment, the drying equipment comprises a drying machine body, the top of the drying machine body is provided with a feeding port, the bottom of the drying machine body is provided with a discharging port, and the top of the feeding port is provided with a limiting cover through threads; a plurality of sets of transverse rods are fixed to the inner wall of the feeding port, limiting discs are fixed to the ends of the transverse rods, and threaded holes are formed in the limiting discs. The problem that when an existing drying machine body works, materials easily enter the inner wall of the feeding port is solved, the arranged limiting blocks can be attached to the top end of the inner wall of the drying machine body, so that the materials can be prevented from entering the inner wall of the feeding port, and the limiting blocks made of beryllium copper alloy make contact with the top end of the inner wall of the drying machine body; and heat is transferred to the limiting block, the bottom of the limiting block makes contact with the materials, meanwhile, the materials can be dried, and the separator can be protected through the arranged limiting block.

The application discloses a beryllium bronze preparation process, which comprises the following steps: first, ultrasonic treatment is performed during the pouring and solidification of a low-beryllium bronze alloy liquid; second, cold deformation processing is performed after vacuum solid solution treatment; and third, aging treatment is performed on the material after the cold deformation processing, including low-temperature aging treatment and high-temperature aging treatment. The low-beryllium bronze alloy prepared by the scheme has achieved a great breakthrough in strength and electrical conductivity.

The present application relates to a kind of preparation methods of beryllium copper alloy, comprising the following steps: (S1) according to mass accurately take raw material: copper, beryllium, copper yttrium alloy, copper titanium alloy, copper manganese alloy, nano ytterbium powder;(S2) the raw material is added to vacuum induction furnace, under inert atmosphere, temperature is raised to 1400-1600 ℃, after the raw material is all melted, on the molten material, smelting is spread under stirring condition, stationary, slagging, under the condition of 1100-1200 ℃, melt is poured in mould, and beryllium copper alloy ingot is obtained;(S3) beryllium copper alloy ingot is sequentially subjected to face milling treatment, solid solution treatment, cold working deformation treatment, aging treatment, and product beryllium copper alloy is obtained.The present application can significantly inhibit the occurrence of overaging by adding a small amount of metal elements and aging under microwave conditions, and then slowly cooling at a constant cooling rate, improve the hardness of alloy, and also improve the mechanical properties, especially the stress relaxation resistance.

The invention discloses a method for preparing a high-conductivity quaternary beryllium-copper-nickel-aluminum alloy ingot blank through vacuum melting, and belongs to the technical field of low-beryllium-copper alloys. The method comprises the following steps: S1, baking raw materials; s2, the furnace is washed multiple times through electrolytic copper till the obtained copper ingot is free of air holes; and S3, raw material proportioning is conducted according to the components of the quaternary beryllium-copper-nickel-aluminum alloy ingot blank, the proportioned raw materials are loaded into a vacuum induction furnace subjected to furnace washing to be subjected to stepped heating vacuum smelting, argon is introduced into the furnace after smelting is completed, casting is conducted under argon protection, and a cast ingot is obtained. According to the method, raw materials are baked, furnace washing is conducted before smelting, and stepped heating vacuum smelting is adopted, so that air holes in cast ingots are effectively eliminated, and the impurity content is reduced.

The application discloses a method for obtaining high-performance copper alloy wire through continuous drawing, which comprises the following steps: taking copper as raw material, melting the copper with Be and other alloy components to obtain a metal melt; using a hot-type continuous casting process to form a fixed-length beryllium copper alloy rod blank; using a stretching die to perform two-group continuous stretching operations on the beryllium copper alloy rod blank, using a spraying reinforced composite material to obtain a reinforced interface between the two-group continuous stretching operations, forming a copper alloy shell layer with Mg and Co on the outside of the reinforced interface, repairing the shell layer to the rod diameter size of the rod blank before the second stretching operation, and obtaining a copper alloy wire master batch; then using the stretching die to perform continuous stretching operation on the copper alloy wire master batch again, drawing the copper alloy wire, annealing the copper alloy wire, cleaning the surface of the copper alloy wire, and obtaining a finished product. The high-performance copper alloy wire prepared by the method has high strength and toughness, high tensile strength, high electrical conductivity and excellent processing performance.

The invention discloses a heat treatment process for a high-strength and high-elasticity beryllium-copper alloy, and belongs to the field of copper-based alloys. The process is used for treating an H-state beryllium-copper alloy plate with the thickness of 0.05-1.5 mm, and comprises the following steps: solution treatment: under the protection of hydrogen / nitrogen mixed gas, loading the H-state beryllium-copper alloy plate into a vertical continuous quenching furnace which is provided with a started thermal circulating fan and is subjected to heat preservation for 4-6 minutes at the solution temperature of 770-820 DEG C, and carrying out solution treatment at the belt running speed of 6-10 m / min, so that the H-state beryllium-copper alloy plate is obtained; cooling the discharged plate to room temperature under the action of a two-stage cooling circulating fan to obtain a C-state beryllium copper alloy plate; and aging treatment is conducted, specifically, the vacuum degree of a box-type resistance furnace is set to reach a preset value, the furnace is filled with nitrogen, then the furnace is empty and heated to the aging temperature of 310-350 DEG C, heat preservation is conducted for 25-35 min, the C-state beryllium-copper alloy plate is loaded into the box-type resistance furnace, heat preservation is conducted for 3-4 h, then the C-state beryllium-copper alloy plate is cooled to the room temperature along with the furnace, and the target beryllium-copper alloy plate is obtained.

This invention discloses a high-temperature resistant beryllium copper oxide alloy for switches and its preparation process. The alloy composition, by weight percentage, includes: Be: 1.30%–1.60%, Co: 0.80%–1.20%, Ni: 0.40%–0.60%, Si: 1.80%–2.00%, Cr: 2.20%–2.50%, Al: 1.20%–1.50%, Ti: 2.30%–2.60%, Mg: 0.30%–0.50%, Zr: 0.030%–0.050%, RE: 0.022%–0.028%, Pb ≤ 0.003%, Sn ≤ 0.003%, and the total amount of other impurity elements ≤ 0.01%, with the balance being Cu. The total amount of other unavoidable impurity elements ≤ 0.01%, with the balance being Cu. The preparation process includes batching, smelting, hot rolling, cold rolling, and secondary aging treatment, resulting in the in-situ formation of a dense composite oxide film on the alloy surface. This invention significantly improves the high-temperature strength and high-temperature oxidation resistance of the alloy through the synergistic effect of Be-strengthened alloy and multiple antioxidant elements. The finished strip exhibits a yield strength ≥880MPa, tensile strength ≥1000MPa, elongation ≥7%, and oxidation rate ≤8×10⁻⁶ at 300℃. ‑5 mg / (cm 2 ·h), a high-reliability switching element suitable for high-temperature environments.

This invention discloses a high compression angle drawing die for beryllium copper alloy wire, comprising a die body. Within the die body's material processing channel, an infeed area, a first drawing section, and a second drawing section are sequentially arranged. A lubricating oil supply hole is formed on the side wall of the infeed area, and this lubricating oil supply hole is connected to an external lubricating oil supply device for wire drawing via a pipeline. A pressurized lubricating oil cavity is also formed between the end of the infeed area and the first drawing section. The minimum inner diameter of the first drawing section is larger than that of the second drawing section. A spacer cavity is formed between the first drawing section and the second drawing section. A circulation pipeline connected to the spacer cavity is provided on the die body, and the circulation pipeline is externally connected to a metallographic polishing lubricating coolant supply device. This invention enables high compression angle drawing of beryllium copper wire during drawing operations through a dual-drawing section structure, effectively ensuring high wire diameter accuracy and high surface quality of the obtained beryllium copper wire product.

The present invention discloses a drying device for producing catalysts using an impregnation method, which relates to the field of drying equipment and includes a dryer body, wherein a feed port is provided at the top of the dryer body, and a discharge port is provided at the bottom of the dryer body, a limit cover is installed on the top of the feed port by means of a thread, a plurality of cross bars are fixed to the inner wall of the feed port, and a limit disk is fixed at the end of the cross bar, and a threaded hole is provided inside the limit disk. The present invention solves the problem that materials easily enter the inner wall of the feed port when the existing dryer body is working, and the limit block is arranged to fit with the top of the inner wall of the dryer body, thereby preventing the materials from entering the inner wall of the feed port, and the limit block made of beryllium copper alloy contacts the top of the inner wall of the dryer body, heat is transferred to the limit block, and the bottom of the limit block contacts the materials, while the materials can be dried at the same time, and the separator can be protected by the limit block.

The utility model is suitable for the technical field of PTC heaters, and provides an integrated PTC heater joint device, which comprises a shell, an insulating fixed seat, a duplex elastic contact mechanism, conductive terminals, radiating fins and the like. Through precise matching of the insulation fixing seat and lubrication and heat conduction effects of the graphene modified silicone grease layer, precise installation and stable operation of the PTC heater can be ensured. The reliability of electrical and mechanical connection is enhanced by the pre-pressure of the beryllium copper alloy elastic sheet assembly and the multi-direction clamping force of the V-shaped clamping opening, and the problems of poor contact and short circuit caused by assembly errors or vibration are reduced; the silver layer plating of the conductive terminal and the design of the multi-hole plug interface reduce the contact resistance and improve the electric energy transmission efficiency; the Z-shaped heat conduction path is combined with the phase change heat conduction glue layer and the heat dissipation fins, heat generated when the PTC heater works can be rapidly dissipated, it is ensured that the PTC heater stably operates at the proper temperature, the service life of the device is prolonged, and the energy efficiency is improved.

This utility model relates to the field of friction brake pad technology and discloses a friction brake pad suitable for the braking device of a monorail locomotive, including a friction brake pad in contact with the track web and a brake seat fixedly connected thereto. The friction brake pad is made of beryllium copper alloy or aluminum bronze, and its surface is treated at high temperature to form an oxide composite layer. Rare earth elements are added to refine the grain, resulting in a friction coefficient fluctuation of less than ±5% under both dry and wet conditions. A 0.5mm wide parallel groove is formed on the braking surface, which, together with the ventilation groove in the brake seat, constitutes a dual heat dissipation system. A preferred design adopts a modular approach, dividing the brake pad into four sector-shaped units connected by corrugated spring steel sheets. Each module is equipped with an independent hydraulic control mechanism, and the piston rod end uses a spherical hinge to achieve angle self-adaptation. This invention solves the problems of large friction coefficient fluctuation and poor heat dissipation in traditional brake pads, and has advantages such as stable braking performance, extended service life, and convenient maintenance. It is particularly suitable for monorail systems with frequent braking.

A fast-response surge arrester includes a housing, an upper end cover, a lower end cover, terminals, heat dissipation fins, and conductive components. The upper and lower end covers are located at opposite ends of the housing. The terminals are located on the outer side of the end covers, and the heat dissipation fins are located on the outer wall of the housing. The conductive components are housed inside the housing and include electrodes, annular zinc oxide valve plates, and conductive gaskets with a beryllium copper alloy nickel-gold plating. The valve plates are fitted with electrodes and spaced axially, and the conductive gaskets are sandwiched between adjacent valve plates and in close contact. The valve plates and conductive gaskets are fixed by fixing pins. Adjacent valve plates are coated with conductive silver paste, and electrode terminals at both ends of the valve plates connect to the terminals. A sealing ring is provided between the end cover and the housing. This invention can quickly form a conductive path, improve response speed, and simultaneously provide efficient heat dissipation, sealing, and moisture protection, ensuring stable operation.