30results about How to "Speed up fusing" patented technology

The invention discloses an excessively-low-current protection lightning-stroke-resisting surge wire-wound resistor. The excessively-low-current protection lightning-stroke-resisting surge wire-wound resistor comprises a mandril, wherein a resistance wire is wound on the mandril, two ends of the resistance wire are respectively connected with a section of conducting wire, the mandril and the resistance wire on the mandril are wrapped by a flame-retardant layer, the flame-retardant layer comprises an inner fusing assistant layer, an intermediate obstruction temperature-suppression layer and an outer insulation paint layer. According to the technical scheme, the fusing point of the resistance wire can be reduced through the fusing assistant layer, and the heat is concentrated onto the resistance wire through the obstruction temperature-suppression layer, so that when an excessively low current (1.2 to 2 times of rated current of the resistor) occurs in the excessively-low-current protection lightning-stroke-resisting surge wire-wound resistor, the fusing of the resistance wire can be accelerated, and the potential safety hazard caused by the burning of a plastic element can be prevented. The excessively-low-current protection lightning-stroke-resisting surge wire-wound resistor also has an excessively-low-current protection function and a lightning stroke surge resisting function.

The invention discloses a ship direct-current networking electric propulsion system which comprises a larboard direct-current bus and a starboard direct-current bus. A generator branch composed of a rectification unit and a generator set, a load branch composed of a frequency conversion unit and a load, and a transformer branch composed of a frequency conversion unit and a daily transformer are respectively led out from the larboard direct current bus and the starboard direct current bus, and a main circuit fuse is connected between the larboard direct current bus and the starboard direct current bus. The larboard direct-current bus and the starboard direct-current bus are each provided with a rapid protection unit, and the rapid protection units, the frequency conversion unit and the rectification unit are connected with the direct-current bus through branch fuses. The invention also discloses a short-circuit fault rapid protection method. When direct-current bus short-circuit fault and branch short-circuit fault happens in the system, a faulty half board or faulty branch is quickly cut off, so that the non-faulty half board or the non-faulty branch is prevented from undervoltage fault, and the system is prevented from shutdown and power failure.

An electric fuse structure comprises a base and an electric fuse. The electric fuse is arranged on a shallow-trench isolation structure on the base and comprises an anode, a cathode and a fuse between the anode and the cathode. The fuse comprises a fuse body and a plurality of protrusions. The protrusions are arranged on the sidewall of the fuse body and distributed along the fuse body length direction. A clearance is formed between every two adjacent protrusions on the same sidewall of the fuse body. According to the technical field, LER (line edge roughness) of the fuse is increased, production method of the fuse with the protrusions is controllable, the method to increase the LER of the fuse is controllable, and accordingly the electric fuse with the LER meeting the requirement is obtained.

A three-layer concrete thermal insulation wallboard superposition method production process belongs to the technical field of building element production and particularly relates to production of insulation boards. The three-layer concrete thermal insulation wallboard superposition production process is characterized by comprising the process sequence of preparing a working table and a bearing base plate; connecting four formworks into an integrated formwork frame; arranging material separation thin films inside the formwork frame; arranging a thin layer of concrete inside the formwork frame and compacting the concrete through jolting; adding foam cement grout for foaming; waiting for initial setting and hardening of the foam cement grout; adding a thin layer of concrete; leveling the concrete and compacting the concrete through jolting, wherein all above steps are a production process of a single piece; adding a formwork frame for performing the superposition production of the next piece; dismantling the formwork frames for repeated usage after initial setting of the three layers is completed; integrally moving and stacking the formwork frames and the bearing base plate for maintenance. By means of the three-layer concrete thermal insulation wallboard superposition method production process, production fields can be reduced, the turnover of dies is fast, the heat preservation effects of the foam cement after warming are food, every piece is spaced by the thin films so that hydrating maintenance of the products during stacking can be achieved and the product quality can be improved, synchronous pouring and maintenance of the three layers can be achieved, and salvation of the three layers can be improved and accordingly the product strength can be achieved.

The invention discloses a method for adding a high-concentration oxygen-enriched solution by adopting an oxygen-enriched solution adding system. The method comprises the following steps: 1) establishing an oxygen-enriched solution adding system which comprises a reaction tank, a diffuser, a pressure regulating valve group and a water pump, wherein a water mist nozzle and an oxygen nozzle are arranged at the top in the reaction tank, a control valve is arranged between the reaction tank and the diffuser, the cylindrical side wall of the diffuser is provided with a channel for releasing an oxygen-enriched solution, namely a small hole or a narrow gap or a combination of the small hole and the narrow gap, and the channel can generate certain back pressure to ensure that the pressure difference between the outlet pressure of the diffuser and the water pressure to be treated is more than 2 bar; 2) regulating the pressure of oxygen to a certain pressure and feeding into a reaction tank; 3) pressurizing the dissolved water to a certain pressure through a water pump, and feeding the dissolved water into a reaction tank from the top of the tank in a high-pressure mist form; 4) arranging a water quality on-line detector at the water outlet, and controlling the opening degree of the control valve through the connection of a signal receiver and the PLC. According to the method, the water quality can be accurately adjusted, meanwhile, the generation of bubbles can be greatly reduced, and the utilization rate of oxygen is greatly increased.

The invention provides an alloy type thermal fuse link for rapid fusing of an LED lamp. Trapezoidal wedges are arranged on two sides of the inner wall of a shell identification surface in the thermal fuse link, two leads are inserted between the two trapezoidal wedges and the inner wall of a shell mounting surface, one ends of the two leads are overlapped after being welded by a thermal element, the periphery of the thermal element is filled with a fluxing agent, one side surface of the thermal element is directly contacted with the inner wall of the shell mounting surface, the other end of the lead extends out of the shell, and an opening of the shell is sealed by an epoxy resin glue. The upper part of each trapezoidal wedge is provided with a guide surface, the thickness of the trapezoidal wedge changes along with the width of the inner cavity of the shell and the diameter of the lead, and the width of the trapezoidal wedge can ensure that the two leads are positioned after being inserted into the shell. The thermal link adopts a trapezoidal wedge-shaped shell which is provided with a slope guide surface and is used for fixing the lead, the thermal element can be in contact with the inner wall of a mounting surface at the bottom in the shell, and heat energy absorbed by the mounting surface of the thermal link enables the thermal element to be quickly fused under the help of a fluxing agent.

Provided is a novel combustion agent which is stable and efficient. The stable and efficient novel combustion agent comprises the following components in parts by weight: 18-21 parts of high-energy aluminum alloy powder or magnesium-aluminum alloy powder, 12-15 parts of ferric oxide, 3-5 parts of molybdenum trioxide, 50-55 parts of copper oxide, 0.5-2 parts of tungsten powder, 1-3 parts of a free-flowing agent and 2-5 parts of fluororubber. The stable and efficient novel combustion agent is prepared by a series of steps of raw material powder mixing, granulation glue solution preparation, mixing granulation and the like. The stable and efficient novel combustion agent disclosed by the invention is easier to mix uniformly, the safety of the preparation process is improved, the fusing and melting-through action capability of flame jet on a metal target object is improved, and meanwhile, various sensitivity indexes are reduced; the compatibility is good, and the stability is excellent; the combustion temperature can reach 2800 DEG C or above, and the flame retardant can be used for igniting materials, damaging core components of facilities and equipment and melting down strip-shaped, rod-shaped and linear metal obstacles. In addition, the invention also provides a preparation method of the stable and efficient novel combustion agent.

The invention discloses a preservative for a fruit juice beverage. The preservative is prepared from the following components in mass-volume ratio: 0.05%-0.10%(w/v) of sodium ascorbate, 0.01%-0.03%(w/v) of pectin and 0.05-0.1%(w/v) of potassium diformate. The preservative for the fruit juice beverage disclosed by the invention has the effects of being green, safe, efficient and antiseptic. The invention further provides a preparation method of fruit juice using the preservative.