199results about How to "Solve high temperature" patented technology

A cooking fume exhauster with refrigerating and air-cleaning functions for exhausting cooking fume fully and lowering temp of kitchen is composed of casing, cooking fume exhausting system, refrigerating system and electric control system. The compressor, condenser and axial-flow fan of said refrigerating system are installed in the outdoor unit, and its evaporator and cross flow fan are installedin the heat exchange chamber of indoor unit.

The invention relates to a vehicle drying dual-clutch cooler, wherein said invention arranges gas inlet (11) and gas outlet (5) on the frame of dual-clutch automatic speed changer; mounts blower fan (12) driven by motor on the gas inlet (11); arranges divert tube (10) inside the frame (2) of speed changer; arranges axial ventilate holes on the flywheel disc (1) and clutch cover (9), to form the air refrigerating system. The invention can use cooling air to cool the clutch, to reduce its working temperature, while high working temperature will affect the service life and working property of drying dual-clutch.

The invention relates to a hydrophilic modified super-hydrophobic-oleophobic composite membrane preparation method and particularly relates to a method for preparing a membrane by utilizing an electrostatic spinning method and performing two-time spray coating modification on the surface of the membrane. According to the preparation method disclosed by the invention, a two-step spray coating method is utilized to perform surface modification on a cellulose acetate electrostatic spinning CA-SiNPs basement membrane, so that the roughness of the electrostatic spinning CA membrane is further improved based on the original, a compact micron-nano cascade structure composite membrane is formed, and the roughness of the surface of the membrane is greatly improved. Meanwhile, compared with a traditional hydrophobic-oleophobic membrane, the hydrophilic modified super-hydrophobic-oleophobic composite membrane provided by the invention has wider pore diameter distribution and better softness; thus, a source and an application range of the hydrophobic-oleophobic membrane material are widened. The preparation method disclosed by the invention has the advantages of simple film formation technology, convenience in operation and easiness in achieving industrial production; furthermore, the prepared composite membrane has the advantages of good antifouling property, high permeation flux, strongchemical stability, good mechanical property, high interception efficiency and wide application prospect.

The invention provides a wet-type dust-capturing wind current cooling device mounted at a head-on rear position of a mining working face mining machine, connected with an outlet end of a polluted wind pumping canister and comprising a cover shell, and a spray dedusting device, a cyclone centrifugal dedusting device, a dust screen filtering device, an air cooling type heat exchanger and a baffle plate demister which are connected in order inside the cover shell; positions of the cover shell walls below the cyclone centrifugal dedusting device and the baffle plate demister are respectively provided with drainage pipe ports. Fully-mechanized excavating working face dust capturing and wind current cooling works are combined together, with a treatment mode of firstly dust capturing and then wind current cooling, polluted wind is firstly subjected to multi-stage dust capturing treatment and then is demisted and cooled, the working face wind current temperature is controlled in a suitable temperature, a safe and comfortable working environment of the down-hole working face is ensured, and the problems of high temperature and high dust of the mine mining working face are better solved.

This invention relates to process and apparatus for producing polyamide. The process comprises: feeding molten hexanolactam, TiO2 and benzoic acid, filtering, polymerizing, granulating, extracting and drying to obtain the product. The apparatus is composed of a feeding system, a post-polymerizing column, an extracting column, and a drying column, and is automatically controlled by DCS. The hosepipe in the post-polymerizing column increases the heat-exchange surface and ensures uniform heating. The water-sealing upper tank increases the pressure on the slices at the top of the extraction column, and prevents the boiling of the slices. Large pores are uniformly distributed on the cone body of the slice extraction distributor to release bubbles. The extraction water temperature has gradient distribution, thus can well extract both slice monomer and slice oligoer. The drying column utilizes high temperature and low nitrogen flow drying, thus can avoid blockage and well distribute the slices. The drying column has a high volume, thus can prolong the stay time pf the slices, increase the wind amount, effectively control viscosity increase of the solid phase, and improve the quality of the slices.

The invention relates to a centralized air supply device of a railway car equipment compartment and an equipment compartment ventilation system. The equipment compartment is composed of a apron board, a bottom plate, an end plate and a framework, one or two centralized air supply devices are installed in the equipment compartment, first air inlets and first air outlets are formed in the apron board, an air inlet of the centralized air supply device is communicated with the first air inlets in the apron board, and an air outlet of the centralized air supply device is communicated with the equipment compartment and used for providing cooling air for air-using equipment in the equipment compartment. Inlet air for the air-using equipment in the equipment compartment is extracted in the equipment compartment, the heat radiation and air filtering effects are good, micro-positive pressure in the equipment compartment is guaranteed, the ways that dust and ice snow enter the equipment compartment are reduced, the number of the first air inlets in the apron board is reduced, and manufacturing and maintenance cost is lowered so that cars can run safely in extremely cold, strong sandy wind, high-temperature environments and other severe environments.

The invention provides a method for making paint coat which could strengthen the surface rejection of heat, and how to prepare the component of the coat elimination coat. The component of boron nitride and bonding agent formed a surface coating to enhance cooling effect. The paint coat could be used with head cooling metal, sheet, fins, metal backplane, metal or plastic material.

The invention discloses a cushion capable of automatically and circularly reducing temperature by liquid, comprising a cushion liquid bag, a cushion, check valves, automatically-sealed connectors, a hose, a heat-preservation bag, an ice bag, a sealing cover, a cooling liquid bag, a fixing belt, a zip fastener and a temperature adjusting valve, wherein an inlet and an outlet of two sides of the cushion liquid bag are forwardly and backwardly connected with two check valves, and are respectively connected with upper and lower inlet and outlet of the cooling liquid bag through the automatically-sealed connectors to form a liquid flowing circuit; and the movement of a human body or operation vibration of a car is used for generating pressure on the cushion liquid bag in the cushion to be circularly cooled by the cushion liquid bag; a power supply is not needed and the cooling cushion can be automatically exchanged with the ice bag in the heat-preservation bag; and the cushion has the advantages of wide application range, simple structure, no noises, no power consumption, safety and reliability, and adjustable temperature, and can solve the problems of lowering the temperature of the cushion of homes, office fields and cars in summer under a high-temperature environment.

The invention provides an ultra-low orbit satellite with an aerodynamic heating protection function. The ultra-low orbit satellite comprises a satellite body. The satellite body comprises a satellite head, a satellite bottom plate and a satellite side surface structure plate. The satellite side surface structure plate is divided into a satellite conical segment and a satellite columnar segment. The ultra-low orbit satellite further comprises a heat insulation gasket, aerogel, a first heat insulation layer and a second heat insulation layer, wherein the heat insulation gasket is arranged in the satellite body and located between the satellite head and the satellite conical segment; the aerogel is located on the outer surface of the satellite head and the outer surface of the satellite conical segment; the first heat insulation layer is located on the outer surface of the aerogel and the outer surface of the satellite columnar segment; and the second heat insulation layer is located in the satellite body and covers the inner side of the satellite head and the inner side of the satellite side surface structure plate. According to the ultra-low orbit satellite with the aerodynamic heating protection function, the problem that the satellite head and the side edge are high in temperature due to aerodynamic heating when the satellite operates on a low orbit at a high speed is effectively solved, a single machine in the satellite can work within an appropriate temperature range, and the heat protection problem of the satellite operating in an ultra-low orbit region for a long time in the aerospace field is solved.

The invention relates to an automatic silk reeling machine in the technical field of raw silk production in the silk reeling industry, in particular to a novel energy-conservation silk drying system of an automatic silk reeling machine. The novel energy-conservation silk drying system comprises a compensation drum wheel, a traverse rod, a silk arranging drum wheel and a small silk-collecting tool. The technical scheme of the invention is as follows: a silk drier inlet drum wheel is arranged at the silk outlet of the compensation drum wheel, a far infrared silk drier is arranged adjacent to the silk drier inlet drum wheel, a photoelectric automatic silk moving mechanism is arranged at the silk outlet of the far infrared silk drier, and the silk outlet of the photoelectric automatic silk moving mechanism is provided with the silk arranging drum wheel. In the invention, less air is heated to heat wet raw silks, the raw silks are evenly dried at a high speed, and silk drying can be finished in the silk reeling machine once, thus the novel energy-conservation silk drying system not only saves energy, but also is favorable for lowering the workshop temperature, the silk reeling operation environment is improved, the problems of multiple working procedures, large energy loss and high workshop temperature of the traditional silk steam drying system for silk reeling production can be thoroughly solved, and according to incomplete statistics, the silk reeling energy consumption is greatly reduced compared with the silk coal-fired steam drying process.

The invention relates to the field of automobile manufacture, in particular to a child high-temperature protection device started by in-car audio frequency for a passenger car. The child high-temperature protection device comprises a control system, an in-car temperature monitoring system, a critical temperature alarm system and an emergency disposal system. A child hypoxia protection device is started by an audio frequency control device arranged on the side wall or a seat in the car. When parking time exceeds 30 minutes and car doors and windows are closed tightly, the audio frequency control device is used for starting the child hypoxia protection device when receiving a high-frequency sound stimulus having over 60 decibels in the car. The control system is used for making a comparison between monitored temperature and the critical temperature after receiving data on oxygen content monitored by the in-car temperature monitoring system in a real-time manner. When temperature in the car reaches or below the critical temperature, the critical temperature alarm system is started and the emergency disposal system is started as well. Therefore, life safety of the child locked in the car is effectively ensured.

The invention discloses Jianshui (Country of Yunnan) purple pottery wood-fired pug and a product firing method thereof. The wood-fired pug is red mud pug prepared by adding water into 8 to 12 percent of argil, 28 to 32 percent of blue earth, 18 to 22 percent of loess and 38 to 42 percent of red soil. The product firing method comprises the following steps: manufacturing a purple pottery product blank from the red mud pug, then putting the blank into a smokeless wood-fired kiln, and firing pines by adopting a wood firing method, or firing the blank together with a Jianshui purple pottery argil blank, ending firing till the temperature is 1,190 to 1,210 DEG C, and cooling in the kiln to obtain a product. The firing temperature of the conventional red mud is changed via preparation of a new red mud formula, so that the difficulty in firing of Jianshui purple pottery is solved, a Jianshui purple pottery wood-fired product with rich kiln changes is obtained, and the production efficiency is improved.

A LED device having high-efficient radiation effect, which contains radiator body with plurality of radiation fins and more than one LED which has a metal unit contacted with radiator body, the heat generated by LED can be effectively conducted by radiator and fins. Said invention can raise the LED service life and reduce luminosity weakening.

The invention belongs to the technical field of exhaust gas treatment and relates to a method and device for treating exhaust gas of a styrene-butadiene rubber drying oven. The method comprises (a) water washing and cooling: introducing exhaust gas of a styrene-butadiene rubber drying oven into a spray cooling tower through a gas inlet pipe so that the exhaust gas reversely contacts with cooling water sprayed from top to bottom, conveying circulating water in a water storage tank at the tower bottom to a cooling medium so that a styrene-butadiene latex heat exchanger is cooled after the reaction, and further cooling the heat exchanger through a heat exchanger pipe 2 with cold water flowing in the water storage tank, (b) biological treatment: feeding the exhaust gas subjected to water washing and cooling into a biological filter tower so that the exhaust gas goes through a biological filter from top to bottom and reversely contacts with a nutrient solution sprayed from top to bottom so as to be purified, and discharging the treated exhaust gas. The method and device overcome the problems of the existence of rubbery viscous materials in the rubber drying oven tail gas, the high concentration of styrene, the large styrene concentration fluctuation range and high temperature, ensure the discharge of the exhaust gas satisfying the standards and have the environmental and economic double benefits.

The invention discloses a Kaldo furnace parameter optimization control method based on a fuzzy clustering genetic algorithm. The method comprises the following steps: carrying out optimization on adding quantity of coke powders, soda and fuel gas by utilizing a fuzzy C-mean clustering genetic algorithm; making a comparison between the optimization result and the actually-measured value of working condition of a Kaldo furnace and carrying out adjustment through controllers; then, carrying out judgment on adjustment values of the adding quantity of coke powders, soda and fuel gas according to the adding quantity of coke powders, soda and fuel gas obtained after adjustment by utilizing a working condition judgment model; if current comprehensive working condition index is in an "excellent" interval, keeping the current operating parameter; and if the current comprehensive working condition index is in a "non-excellent" interval, calling an operating parameter optimization model to give operation optimization guidance. The beneficial effects of the method are that the problem that it is difficult to establish an industrial on-line control mechanism model due to high temperature, complex reaction and varied and undetermined factors in the working process of the Kaldo furnace is effectively solved.

The invention relates to the field of automobile manufacturing, in particular to an automobile riding child high temperature protection device. The automobile riding child high temperature protection device comprises a control system, an inside-automobile temperature monitoring system, a critical temperature alarm system and an emergency processing system. The control system compares temperature data with the set critical temperature after receiving the temperature data monitored in real time by the inside-automobile temperature monitoring system. When the inside-automobile temperature reaches or exceeds the critical temperature, the critical temperature alarm system is started, the emergency processing system is started at the same time, and therefore the life safety of a child trapped in an automobile is effectively protected.

The invention discloses a vacuum filter, and belongs to the field of filtration, which is used for solving the problems of cooling and dedusting of high-temperature and dust-contained gas in a vacuum working system. The vacuum filter comprises a cavity body, a diffuser and a filter element, wherein the cavity body is provided with a gas inlet connected with a specific gas pipeline and a gas outlet connected with a vacuum pump; the top end of the cavity body is provided with a top cover connected with the cavity body in a sealed mode; the cavity body is internally provided with the diffuser at the gas inlet; the filter element is installed at the center in the cavity body; the side wall of the filter element is provided with filter holes; the bottom surface of the filter element is provided with an opening leading to the gas outlet of the cavity body, thereby preventing the vacuum pump and an upstream-downstream system from being damaged by high-temperature, corrosive and dangerous dust particles, and solving the problem of too complex and frequent maintaining frequency of the vacuum pump of the vacuum filtration system. From the aspect of environment protection, gas in pipelines can be further cooled down and purified, and air pollution can be reduced.

The invention discloses a wave-transparent multilayer heat insulation structure for realizing thermal control of a spacecraft antenna. The wave-transparent multilayer heat insulation structure comprises reflecting screens (1), spacing layers (2), a surface film (3) and an inner side film (5). The laminated structure of the multiple layers of reflecting screens (1) has the effect of increasing infrared radiation thermal resistance. The spacing layers (2) are arranged between every two layers of reflecting screens (1) to isolate the heat conduction between layers of the reflecting screens (1).The surface film (3) has the effect of reflecting solar spectrum heat radiation. A sewing material (4) is used for multilayer sewing of the reflecting screens (1). An inner side film (5) and the reflecting screens (1) are made of the same material, and the inner side film mainly plays a role in protection to avoid damage caused by friction between the multilayer heat insulation structure and a product . According to the invention, the wave-transparent multilayer heat insulation structure has good transmissivity for working electromagnetic waves of the antenna and has high reliability.

The invention belongs to the field of auxiliary articles for electronic products, and particularly relates to a novel cooling protective jacket which is used for cooling a heating electronic product through heat of solution. The novel cooling protective jacket is nearly suitable for all high-performance portable electronic products. The main technological improvement of the cooling protective jacket for the heating electronic product lies in that the cooling protective jacket comprises a frame and a bottom surface, wherein the frame is a square frame which is adaptive to the shape of the electronic product, the bottom surface is formed by at least one cooling bag, a phase change cooling material or a metal material is put in the cooling bag, and the bottom surface and the frame are subjected to hot-pressing so as to form an integral structure; the frame is in the shape of a framework with an open pore, the cooling bag is fixed at the open pore, and the cooling bag and the edge of the open pore of the frame are subjected to hot-pressing so as to form an integral structure. The invention can provide a novel mobile phone cover with a cooling function and a manufacturing method of the mobile phone cover. The novel mobile phone cover has the decoration and protection functions of common mobile phone covers and meanwhile has the function of cooling a mobile phone.

The invention relates to the field of automobile manufacturing, in particular to an automobile riding child high temperature protection device started through a door handle inside an automobile. The automobile riding child high temperature protection device comprises a control system, an inside-automobile temperature monitoring system, a critical temperature alarm system and an emergency processing system. The child high temperature protection device is started through a control device arranged on the door handle inside the automobile. When the parking time exceeds 15 minutes and a door window of an automobile door is closed, a child trapped in the automobile can start the child high temperature protection device by pulling the door handle inside the automobile. The control system compares temperature data with the set critical temperature after receiving the temperature data monitored in real time by the inside-automobile temperature monitoring system. When the inside-automobile temperature reaches or exceeds the critical temperature, the critical temperature alarm system is started, the emergency processing system is started at the same time, and therefore the life safety of the child trapped in the automobile is effectively protected.

The invention discloses a novel portable energy-saving welding device. The novel portable energy-saving welding device comprises a welding machine. A portable handle is arranged on the top of the welding machine. An inversion current device is arranged in the welding machine. A cooling fin is arranged at the lower end of the inversion current device. Each of the two ends of the cooling fin is provided with a heat dissipation draught fan. Four storage batteries connected in series are arranged at the lower end of the cooling fin. Each of the front end and the rear end of the welding machine is provided with a solar cell panel. A display screen is arranged on the right side of the welding machine, an adjusting switch is arranged on the right side of the display screen, a charging interface is arranged below the adjusting switch, a power switch is arranged on the left side of the charging interface, and a heat dissipation air outlet is formed below the power switch. A positive electrode interface and a negative electrode interface are arranged at the lower end of the heat dissipation air outlet. The positive electrode interface is connected with a welding clamp through a welding clamp wire, and the negative electrode interface is connected with a bond strap clamp through a bond strap. The novel portable energy-saving welding device is convenient to carry, suitable for various outdoor welding operation and wide in adaptability.

The invention belongs to the technical field of metal ceramic material preparation, and in particular relates to a method for preparing micro-nano TiC / TiSi2 composite powder. The method is characterized by comprising the preparation steps of preparing raw materials such as silicon powder, titanium powder and graphite powder, wherein the molar ratio of silicon powder to titanium powder to graphite powder is (1-4):(1.5-3):1, and the particle diameter of the silicon powder, the titanium powder and the graphite powder is more than or equal to 300 meshes; uniformly mixing the silicon powder, the titanium powder and the graphite powder; adding NaCl of which the addition is 1-2 times the total weight of mixed powder into the mixed powder obtained in the step (1), grinding the obtained mixture, uniformly mixing, and preparing into billets; putting the billets into molten sodium chloride with a temperature of 1000 DEG C, preserving heat for 60 minutes, and cooling to obtain a sodium chloride salt block carrying the TiC / TiSi2 composite powder; performing desalination treatment on the sodium chloride salt block carrying the TiC / TiSi2 composite powder, and removing sodium chloride to obtain the 100-500nano TiC / TiSi2 composite powder. The method disclosed by the invention is simple in process, low in preparation temperature, low in energy consumption and low in production cost.

The invention provides a shielding apparatus, a processing method and a device, and a semiconductor device. The shielding apparatus comprises a shell, the shell is provided with a plurality of through holes, and a sidewall curve of the shell is parallel to a magnetic line of force in a magnetic field where the shell is located. The technical scheme of the invention can reduce the cutting area of the magnetic field and the shielding apparatus, thereby reducing the vortex in the shielding apparatus, and reducing, even eliminating the conversion from magnetic field energy to heat, so that the loss of the magnetic field energy can be reduced, and the problem of higher temperature of the shielding apparatus also can be solved completely.

The invention discloses an energy-saving and environment-protecting technical scheme and device achieving efficient heating and low-pollution cooking with an internal combustion engine and relates to energy-saving and emission-reducing technologies in indoor heating and cooking in the fields of life and business. The technical scheme and device are characterized in that a four-stroke internal combustion engine drives a cooling agent type air conditioner device to carry out heating, an internal combustion engine exhaust pipe is connected with an exhaust noise elimination heat exchanger, an internal combustion engine cylinder body water sleeve provides hot water for a heating radiator, a double-energy heating system is formed, and the comprehensive energy saving rate is larger than 40%; meanwhile, a pot with an exhaust heating cavity is connected between the internal combustion engine exhaust pipe and the exhaust noise elimination heat exchanger to form a kitchen-pot sealed combination body, comprehensive energy-saving using of energy for heating and cooking is achieved, meanwhile, the problem of high temperature and pollution is solved, the internal combustion engine drives a fan to discharge cooking waste gas, and the problem of range hood noise is solved.

The invention provides an air conditioner outdoor unit. The air conditioner outdoor unit comprises a shell, a heat exchanger arranged in the shell, a compressor, a middle partition plate and an electric appliance box radiator. The heat exchanger comprises a heat exchanger body, a first bending section and a second bending section, wherein the first bending section and the second bending section are arranged at the two ends of the heat exchanger body respectively. The compressor is arranged in the shell. The middle partition plate is arranged in the shell and divides the heat exchanger and the compressor. The middle partition plate and the first bending section are matched and form a containing space. The electric appliance box radiator is arranged on the middle partition plate and located in the containing space. According to the technical scheme, the problem that in the prior art, when an air conditioner outdoor unit operates, the temperature of an electric appliance box is high is solved.

The invention relates to a magnetic filtration and separation device, which consists of a magnetic field regulator, a magnetic resistance chip, a magnetic quantum generator, a gyromagnetic net, a piezomagnetic ring, a liquid outlet, positioning pin holes, and a liquid inlet. The magnetic quantum generator is wedged into a concave box nest of the magnetic field regulator, the magnetic resistance chip is fixedly embedded to four corner point positioning holes of the magnetic field regulator's semicircular concave section through the positioning pin holes, the gyromagnetic net is fixed on a magnetic rotating drum through the piezomagnetic ring, and the upper part and the lower part of the magnetic rotating drum are respectively provided with the liquid outlet and the liquid inlet that are fixed by the piezomagnetic ring with screw. By means of the electromagnetic filter technology, the magnetic field regulator realizes energy-saving innovation of electromagnetic filter, the magnetic field with internal gradient can realize automatic adjustment of lifting according to needs, the magnetic force distribution is even, the filter element adsorbability is strong, and the filtration efficiency is high. The magnetic filtration and separation device provided by the invention has increasingly important significance and market opportunity for recovery of high catalytic activity raney nickel catalyst in poly-aromatic hydrocarbon hydrogenation reaction.

The invention discloses a current limiting method, a current limiting-constant current combined power circuit and a control method thereof. The current limiting method comprises the steps of when an input voltage is higher than a set voltage, limiting an AC component of current output by a rectifier bridge by a capacitance value of a current limiting capacitor; and when the input voltage is lower than the voltage of the current limiting capacitor, supplying power to a load by the current limiting capacitor. The power circuit comprises an AC power supply, a rectifier bridge, a current limiting-constant current circuit and a load, wherein the AC power supply is a sine wave AC power supply, the rectifier bridge comprises two input ends and positive and negative electrode output ends, and the two input ends are connected with the AC power supply; the current limiting-constant current circuit comprises four ends, wherein the first end is connected with the positive electrode output end of the rectifier bridge, the second end is connected with the negative electrode output end of the rectifier bridge, the third end is connected with one end of the load, and the fourth end is connected with the other end of the load. The method is combined with the circuit for limiting the current and reducing the power consumption of the power circuit at the same time.

The invention discloses a gravure printing machine and an ink cooling system thereof. The ink cooling system thereof comprises an ink printing mechanism and an ink cooling system, wherein the printingink printing mechanism comprises an ink groove, a scraper and a printing roller; the printing ink cooling system comprises a machine frame, a cooling tank, a stirring motor, supporting foot frames, supports, a condenser, a control main machine, an ink pumping pump I, an ink pumping pump II and a filtering cylinder; and the filtering cylinder, the cooling tank and the supports are sequentially installed on the machine frame from left to right. According to the machine and the system, a traditional printing technology is upgraded, the overall cooling system is a closed type, harmful gas is notdischarged into the air, the operation process is more environment-friendly, and no pollution is caused to the environment; after the cooling system is used, the problem that the temperature of the existing printing ink is high can be solved, the volatilization speed of a solvent can be reduced, the use amount of the solvent can be reduced, and the quality problems of products such as dry printingand dragging caused by high ink temperature are reduced as well, and green printing is achieved.

The invention discloses a high-voltage hot-line work robot insulating hopper hydraulic air-conditioning system and method. The hydraulic air-conditioning system comprises an insulating boom type aerial hydraulic system, an air-conditioning hydraulic motor, a transmission system and an air-conditioning system. The air-conditioning hydraulic motor is connected with an oil tank of the insulating boom type aerial hydraulic system. The air-conditioning hydraulic motor is connected with a compressor in the air-conditioning system through the transmission system. The air-conditioning system is arranged on a high-voltage hot-line work robot insulating hopper. The system has the beneficial effects that a power source of the hydraulic air-conditioning system adopts the hydraulic motor for driving, workloads of a main engine are reduced, the phenomenon that the engine exhausts black smoke is avoided, and the fault rate of a boom type aerial is reduced.