52results about How to "Solve the ignition problem" patented technology

The invention discloses a method of a zero passage switch of an electromagnetic relay and a circuit, wherein an electromagnetic relay zero passage pull-in method comprises the following steps of: setting an initial value of the pull-in initial lead of the electromagnetic relay; detecting the input alternating voltage; pulling in the electromagnetic relay in advance before the input alternating zero point by the initial value of the pull-in initial lead of the electromagnetic relay according to pull-in control signals and the predicted input alternating zero point; detecting the actual pull-in time point of the electromagnetic relay and the input alternating zero point; if the actual pull-in time point of the electromagnetic relay and the input alternating zero point are identical, ending the detection; if not, modifying the pull-in initial lead of the electromagnetic according to the error between the actual pull-in time point of the electromagnetic relay and the input alternating zero point; and then repeatedly executing the steps. The invention solves the problems of striking fire of the electromagnetic relay and EMI by a circuit self-learning way, improves the service life of the relay, and reduces the manufacture cost of circuit design.

The invention provides a minitype broadband throttling device used for a transmission shaft in a guided wave system, which comprises an inner wall 1, a casing 2, a base 3 and a medium gasket 4 of the throttling device, wherein the top of the inner wall 1 of the throttling device is connected with the casing 2 of the throttling device, and the casing 2 of the throttling device is connected with the base 3 of the throttling device; the inner wall 1 of the throttling device is positioned by the medium gasket 4; and a transmission shaft 5 is positioned in the center of the throttling device, and the transmission shaft 5 and the throttling device are coaxial. The throttling device has small volume, light weight, easy processing, wide frequency band and little microwave leakage, and is suitable for an occasion that a mechanical transmission device is introduced into the guided wave system when a microwave system and a mechanical transmission system work synergically.

The invention discloses a high-voltage coaxial cable joint and aims to solve the problem that an existing high-voltage coaxial cable joint is likely to cause sparks when large current flows and is inaccurate to connect and position. The high-voltage coaxial cable joint consists of a cable male connector and a cable female connector. The connection reliability is improved by disposing a metal spring on the contact surface of the cable male connector and the cable female connector. The positioning accuracy is improved by installing an auxiliary positioning ring on the outer insulator of a high-voltage coaxial cable. Thus, the overall connection effect of the high-voltage coaxial cable joint is improved. The high-voltage coaxial cable joint realizes the high-voltage potential contact betweenthe inner conductor connecting body and the female connecting body of the cable male connector, and the elastic connection of the ground potential contact between a male connector nut and a female connector flange, so as to avoid partial contact in case of eccentric installation . The high-voltage coaxial cable joint solves the sparks when the pulsed large current flows, enhances a connection effect, and is suitable for high-voltage coaxial cables of different radial sizes, and is improved in universality.

The invention discloses a graphene electrothermal film for floor heating, which is prepared according to the following steps: coating a graphene heating film on the surface of an insulating substrateof the electrothermal film, and implanting copper electrodes into two opposite sides of the graphene heating film; printing bridging electrodes on the surfaces of the graphene heating film and the copper electrode; and then covering and packaging the second insulating substrate to form the flexible circuit board. The heating body of the graphene electrothermal film for floor heating is in good contact with the bridging electrode and the copper electrode. The bridging electrode completely coats the copper electrode. The contact resistance between the bridging electrode and the surface of the copper current-carrying electrode is obviously reduced. The graphene electrothermal film has the advantages that the the peeling resistance is improved, the risk of fire caused by edge sparking of the heating body is effectively solved, the energy utilization rate is increased, the whole-process automatic production is more favorably realized, and the problem that the copper electrode compounding process is easy to be abnormal and cannot be automatically connected with the front-end process in the traditional production process is completely eradicated.

The invention relates to the technical field of vacuum electronic devices, and discloses a double-grid control type cold cathode electron gun and a preparation method thereof. In accordance with the present invention, A simple, a new type of electron gun with long service life and excellent performance is provided, the cold cathode is used as the emission source of the vacuum electronic device, Asurface of the cold cathode is arrayed by a cathode grid, which can effectively weaken the electrostatic shielding effect of electron emitted by large area cold cathode material, the emission currentof large area cold cathode material is increased, At the same time, the surface of the cathode substrate is designed as a whole plane so as to not only avoid machining burr and other problems, improveedge effect and spark phenomenon, but also make the electric field distribution on the surface of cathode substrate flat, which is conducive to improving the uniformity of emission current density and achieving the purpose of large current emission, so the electron gun can be used in vacuum electron radiation components or devices that generate large current and high density electron beam.

The invention provides a mica high temperature resistant electrothermal film and a preparation method thereof. The mica high temperature resistant electrothermal film comprises a metal electrode, and a first mica layer, a first heat conduction film, a metal heating layer, a second heat conduction film and a second mica layer which are successively stacked from bottom to top; the first heat conduction film is evenly coated on the upper surface of the first micro layer; the metal heating layer is arranged on the upper surface of the first heat conduction film; a plurality of conductive alloy bars are evenly distributed on the metal heating layer; the metal electrode is electrically connected with the metal heating layer; the second heat conduction film is evenly coated on the upper surface of the metal heating layer; the second mica layer is arranged on the upper surface of the second heat conduction layer; the main components of the first heat conduction film and the second heat conduction are silicon carbide; and the mass fraction of the silicon carbide is more than or equal to 50 %. According to the mica high temperature resistant electrothermal film and the preparation method thereof, the use security and service life problems resulted from partial over heat of the micro electrothermal film can be effectively solved.

The invention belongs to the technical field of high-frequency induction thermal plasma. Aiming at the problems existing in current high-frequency induction thermal plasma generation devices, such as difficulty in ignition, poor working stability, high arc maintenance power, and low efficiency, the invention provides a thermal plasma arc flame generator. The present invention includes a laminar arc thermal plasma generator [1] and a high-frequency induction thermal plasma generator [2], which is characterized in that it is injected along the central axis [5] of the high-frequency induction thermal plasma generator [2] The laminar arc thermal plasma jet [3] plays the role of arc guidance, arc maintenance and induction enhancement of the high-frequency induction thermal plasma flame [4]. The laminar arc thermal plasma jet [3] has the advantages of long jet length, small fluctuation of flow field parameters, almost no entrainment of ambient gas, long length of high temperature zone, and small axial gradient of parameters such as temperature. Adopting the technical scheme of the present invention can solve the problems of difficult ignition and easy arc breaking of the high-frequency induction thermal plasma generator, reduce the operating frequency and arc maintenance power of the high-frequency induction thermal plasma generator, and increase the Efficiency facilitates the development of higher power high-frequency induction thermal plasma generators.

The invention discloses a preparation method of a graphene electrothermal film for floor heating, which comprises the steps of coating the surface of an insulating base material of the electrothermalfilm with a graphene heating film, implanting copper electrodes into two opposite sides of the graphene heating film, and arranging the graphene heating film and the copper electrodes at intervals; and printing a bridging electrode on the surfaces of the graphene heating film and the copper electrodes. A heating body of the graphene electrothermal film for floor heating prepared by the method is in good contact with the bridging electrode and the copper electrodes; the bridging electrode completely coats the copper electrodes; the contact resistance between the bridging electrode and the surface of the copper current-carrying electrode is obviously reduced; and the peeling resistance is improved, the risk of fire caused by edge sparking of the heating body is effectively solved, and the energy utilization rate is increased. In addition, the whole-process automatic production is more favorably realized, and the problem that the copper electrode compounding process is easy to be abnormaland cannot be automatically connected with the front-end process in the traditional production process is completely eradicated.

The invention provides a four-path high-power microwave synthesizer manufacturing method based on 3D printing and a synthesizer. A relationship between a coupling degree and a waveguide radius, a microwave frequency, a microwave mode and a slit width is deduced according to an electromagnetic coupling wave theory. A time domain finite difference algorithm is adopted to model the synthesizer, simulation is performed according to the coupling wave theory, and finally, the synthesizer is formed at a time through 3D printing, a four-path high-power synthesizer with high synthesis efficiency is manufactured, and a function of synthesizing microwaves output by microwave sources of multiple different frequency bands and the function of outward radiation of a common antenna are achieved. Namely, synthesis efficiency and total output power of the microwaves are improved while an output microwave frequency band of a system is expanded. The four-path high-power synthesizer is formed and manufactured at a time through a 3D printing technology, a sparking problem when the synthesizer is manufactured through a traditional method is effectively solved, and the method and the synthesizer are applied to an HPM radiation system with output power which is an MW-magnitude microwave millimeter wave source.

The invention relates to an intelligent lamp circuit which comprises a brightness detection circuit, a radar induction circuit, an infrared thermopile induction circuit, a signal processing circuit, an electronic switch circuit, an LED lamp circuit and a power supply circuit. The power supply circuit provides power; the brightness detection circuit, the radar induction circuit and the infrared thermopile induction circuit are connected with the input terminal of the signal processing circuit. The electronic switch circuit is connected with the signal processing circuit, and the electronic switch circuit is connected with the LED lamp circuit; the signal processing circuit sends a switching signal to the electronic switch circuit, so that the electronic switch circuit sends an electric control signal to the LED lamp circuit, and the LED lamp circuit controls an LED lamp to be turned on or turned off. Radar, infrared and brightness detection technologies are adopted and comprehensively applied, detection of movement and stillness of a human body in the daytime and at night is achieved, and the sparking problem is solved through an electronic switch without a mechanical contact.

The invention discloses an ignition device of a water-coal slurry cold wall gasifier. The ignition device comprises the water-coal slurry cold wall gasifier and a hearth arranged in the water-coal slurry cold wall gasifier in a nested mode. A chamber for water-coal slurry and oxygen combustion is formed in the hearth, a guide opening is formed in the end of the hearth and connected with a water-coal slurry process burner, and the water-coal slurry process burner is fixed to the water-coal slurry cold wall gasifier through a water-coal slurry burner connector. The ignition device further comprises a guide channel. The guide channel penetrates through the water-coal slurry cold wall gasifier and the inner wall of the hearth in sequence and is communicated with the chamber formed in the hearth, and an ignition startup burner is arranged in the guide channel in a nested mode and moves freely in the guide channel. According to the ignition device, ignition operation is simple, system transformation is small, cost is low, stability is good, and the service life of the burners is long.

The invention discloses a bilateral LC compensation type CPT system and a parameter design method thereof. Under the size limitation of any given output power Po, output load Ro and capacitive coupling mechanism, the bilateral LC compensation type CPT system can simultaneously realize the minimum voltage stress, the optimal AC-AC efficiency and the minimum number of capacitors, and facilitates the development demand of the CPT system in a miniaturized application occasion. According to the parameter design method, the resonant frequency is designed, the voltage stress of the capacitive coupling mechanism is limited within a reasonable design range, and the sparking problem caused by air breakdown between metal polar plates is avoided while the power transmission capacity is ensured.

The invention discloses a domestic gas blasting stove with a safety control system. The domestic gas blasting stove comprises an igniter, a combustor, at least two injection pipes communicated with the combustor, and a valve for controlling the injection pipes to open and close, wherein an ignition needle connected with the igniter is arranged on the combustor; at least one of the injection pipes is a natural air inlet type injection pipe, and at least one of the injection pipes is a blasting injection pipe; the domestic gas blasting stove also comprises a blasting device, a controller and an induction needle; the induction needle is used for inducing the gas combustion state; the blasting device is used for inputting air into the blasting injection pipe; and the controller is respectively connected with the induction needle and the blasting device and controls the blasting device to start, stop and regulate the air according to an induction signal of the induction needle. According to domestic gas blasting stove disclosed by the invention, the potential safety hazard problems caused by ignition difficulty and floating flames or blow-off of the domestic gas blower are effectively solved.

The invention discloses an improved explosion-proof switch button. The improved explosion-proof switch button comprises a panel. The improved explosion-proof switch button is characterized in that a switch button is arranged in the panel; the switch button is connected with a conductive sheet at the back surface of the panel through a pin body; the conductive sheet is arranged inside a junction box at the back surface of the panel; the conductive sheet is connected with the junction box through springs; a plurality of conductive contacts are arranged between the junction box and the panel; and the conductive contacts are connected with wiring columns. According to the improved explosion-proof switch button of the invention, a point-pressing switch-on and switch-off mode is adopted, and therefore, problems of poor contact, arcing and explosion can be effectively solved, and personal safety and the safety of electric equipment can be ensured.

The invention discloses an automatic ignition and air entraining device for a full automatic casting machine, which comprises a main gas inlet pipe for natural gas and a group of parallel sub-gas inlet pipes for natural gas; a pressure regulating valve and a main solenoid valve are arranged at a front pipeline positioned on the sub-gas inlet pipes on the main gas inlet pipe; each sub-gas inlet pipe is provided with a sub-solenoid valve, a combustion nozzle and an electronic ignition device sequentially; the end part of each sub-gas inlet pipe is connected with an ignition pipe; the ignition pipe is provided with a group of obliquely downward gas outlet holes; the main solenoid valve and each sub-solenoid valve are connected to a PLC (Programmable Logic Controller). When the casting is started, the main solenoid valve and the sub-solenoid valve of the natural gas of a casting box position are opened; the electronic ignition device is used for automatically igniting mixed natural gas of the ignition pipe of the box position and accordingly igniting combustible gas discharged from a cavity and each gas hole of a sand core; the gas discharge of the cavity is accelerated; and then, the solenoid valves of the natural gas are closed. The automatic ignition and air entraining device for the full automatic casting machine is timely and accurate in ignition and air entraining, the defects of casting gas holes are reduced, the labor cost is saved, and the personal safety accidents are avoided.

The invention relates to a multi-flame lighter, comprising a casing; a storage including air tank, air outlet valve and an air inlet valve; an air outlet control lever; a wind-proof assembling units; and an ignition control unit including an electronic igniter, a flint ignition device and a pull button, wherein, said electronic igniter mounted under the pull button which is exposed partly to the surface of the one side of casing. It is characterized in that: the storage has a second outlet valve, which has a candlepower outlet pipe. The invention integrates the advantages of lighter and the wind-proof lighter, meeting the requirement of wind-proof and using for longtime, improving the service life of lighter significantly. And it has simple and reasonable structure with simple operation, while realizing the selection of two flames without increasing the volume of the lighter.

The invention discloses a method and a device of free-stitching shoe face air-isolation fusion welding pressurization. The method comprises the following steps that S1. a to-be-processed shoe face isplaced on a working table, wherein the to-be-processed shoe face is formed by laminating a plurality of layers of shoe face materials; S2, a pressurization cover is arranged, and the pressurization cover and the working table are oppositely closed and tightly compressed, wherein the pressurization cover comprises an airtight cover and a silica gel membrane, the airtight cover is connected with a non-contact heating device, and the silica gel membrane covers the to-be-processed shoe face; and S3, air is inflated into the pressurization cover, so that the silica gel membrane is made to form a coated pressurization pressure on the to-be-processed shoe face; and the heating device is used for carrying out non-contact fusion welding processing on the to-be-machined shoe face; and the pressurization cover, the working table and the heating device are correspondingly arranged according to the method by the device. According to the method and the device, a pressure applying limit with maxim ofonly 0.1 MPa of the vacuum coating is overcome; and the ionization breakdown voltage of an air medium when high-frequency fusion welding is performed can be greatly improved, an optimal fusion welding effect can be obtained, and the product quality is improved.

The invention discloses a coil bottom pushing type electromagnetic gun and a pitching adjusting device thereof, and belongs to the technical field of electromagnetic launching. An active driving mechanism in the pitching adjusting device can control the change of the pitching angle of a gun barrel on one hand, and can be matched with a follow-up supporting mechanism to jointly support the gun barrel on the other hand; furthermore, three-point support is formed on the gun barrel with the fixed base, so that the influence of the shaking of the gun barrel on the launching precision is avoided; a rotating motor and a servo motor are matched for use, so that the gun barrel can be quickly aligned to a striking direction to enter a combat state; the coil bottom pushing type electromagnetic gun is integrated with an aiming system, a rough aiming module and a fine aiming module are used in cooperation, a hit target can be rapidly located, meanwhile, the fine aiming module has a distance measuring function, the distance between the electromagnetic gun and a hit point at present can be measured while imaging is achieved, and the hit point can be located through an infrared aiming system at night or under the condition of low visibility; and combat requirements in all-weather and complex environments are met.

The invention provides a biomass gasification and combustion boiler with a secondary ignition device, belongs to the technical field of boiler combustion, and solves the problem that by adoption of aconventional biomass boiler, the boiler temperature is low at the beginning of ignition, the ignition is difficult, black smoke is generated, and the combustion is unstable. According to the biomass gasification and combustion boiler, a primary ignition device is positioned at the lower end of a biomass gasifier and used for the ignition for biomass fuel gasification; and the secondary ignition device is positioned at the outlet of a connecting device arranged between a biomass gasification chamber and a combustion chamber, and used for the ignition of biomass gasification gas. The working process of the two ignition devices comprises the following steps: biomass fuel enters the biomass gasification chamber through a feeding screw conveyor, the primary ignition device is started, and the biomass gasification gas generated from the biomass gasification chamber enters the combustion chamber through the connecting device; at the time, the boiler temperature is low at the beginning of ignition and the secondary ignition device is started; and when the boiler temperature meets the temperature demand of the combustion chamber, the secondary ignition device is stopped. By adoption of thebiomass gasification and combustion boiler provided by the invention, the flame stabilization of the biomass combustion chamber can be guaranteed, and the incomplete combustion, caused by the low boiler temperature at the beginning of ignition, of biomass gasification gas can be effectively avoided.

The invention discloses a gas ignition type inner hole supersonic spray gun which comprises a gun body, a gun barrel, a pressure stabilizer, a combustion chamber and a connector. An igniter and three gas channels are arranged on the pressure stabilizer; inlets of the three gas channels are communicated with an oxygen conveying pipeline, a fuel oil conveying pipeline and a fuel gas conveying pipeline respectively; outlets of the three gas channels are respectively communicated with an inlet of the combustion chamber; a cooling water channel is arranged on the gun body and is communicated with a cooling water inlet pipe; and a gap is arranged between the combustion chamber and the gun body, and is respectively communicated with the cooling water channel and a cooling water outlet pipe to form cooling water circulation. According to the gas ignition type inner hole supersonic spray gun provided by the invention, combustible gas is firstly introduced for primary ignition, and fuel oil is introduced for secondary combustion after flame is introduced into the combustion chamber, so that the aim of igniting the spray gun to form high-speed flame flow is fulfilled, and the ignition problem of an external ignition type spray gun is solved.

The invention relates to the technical field of household appliances, in particular to an electric purification assembly and air purification equipment. The electric purification assembly comprises adischarge electrode and a dust collection electrode corresponding to the discharge electrode. The discharge electrode comprises a base body and at least one discharge body spirally arranged on the base body. According to the electric purification assembly, the density of ionized plasmas can be greatly improved by adopting the spiral discharge bodies, and meanwhile, the discharge bodies are spirally designed, so that the discharge volume is reduced; and furthermore, the discharge bodies are spirally fixed to a bracket, do not need to be tensioned by a spring, so that a thinner ionization wire is selected, an ionization voltage can be further reduced, the problems that creepage and sparking are prone to being caused by high existing ionization voltage are solved, and the ozone of ionizationdischarge is reduced.

The invention discloses an adjustable electric cooker contact switch. The adjustable electric cooker contact switch is characterized by comprising a contact holder, a screw set on the contact holder,and an upper fixing sheet and a lower fixing sheet which are mutually spaced. The upper fixing sheet and the lower fixing sheet are separated by a first ceramic washer and are fixed on the contact holder through the screw. A leaf spring is connected with the upper fixing sheet through a fastening element. Mutually corresponding contacts are set on the lower fixing sheet and the leaf spring. The adjustable electric cooker contact switch is simple in structure, convenient in usage and adjustment and high in stability.