43results about How to "Avoid arc phenomenon" patented technology

The invention discloses a method for roasting an aluminum electrolytic bath with a polymorphic structure cathode, which comprises the following steps of: filling a concave part on the surface of the polymorphic structure cathode with aluminum powder or aluminum blocks with shapes corresponding to that of the concave part to ensure that the filled surface and a convex surface of the polymorphic cathode are in the same horizontal plane; paving a layer of coke particles on a plane of the cathode; hanging an anode on the layer of the coke particles, and electrifying and roasting the aluminum electrolytic bath until 60 to 70 percent of the area of the surface of the cathode reaches or exceeds 900 DEG C; and when over 60 percent of the area in the electrolytic bath has a fused electrolyte with the thickness of 10 centimeters, infusing the electrolyte into the electrolytic bath to perform a wet method or adopt a dry method to start the roasting. The aluminum block/powder-coke particle composite roasting technique is favorable for the even distribution of the current and the temperature on the surface of the cathode and the reduction of heat vibration, thereby not only preventing an aluminum liquid roasting method from performing thermal shock on an inner lining of the cathode, but also solving the problems of uneven distribution of the current of the cathode and the like caused by large differences of the coke particle thickness when the aluminum electrolytic bath with the polymorphic structure cathode singly adopts coke particle roasting, and improving the roasting quality of the inner lining of the cathode.

The invention relates to a control method for a charging and heating loop of a power battery. The method is characterized in that after a battery management system BMS is connected with a charger, inthe process that a heat source of a heating device is transitionally switched from a power battery to the charger, when the battery management system BMS detects that the output current of the batteryis 0, a main negative relay is disconnected, and a heating loop is connected; and after the lowest monomer temperature of the power battery is heated to be higher than a set temperature threshold value for stopping heating, the battery management system BMS requests to adjust the charger voltage to be equal to the total voltage of the power battery, no potential difference exists between the twoends of the power battery and the output end of the charger, the main negative circuit breaker is closed, and the heating loop is switched into the charging loop. According to the invention, the electric arc phenomenon during the relay action is avoided, and the adhesion or other fault risks caused by the on-load action of the relay in the heating and charging conversion process are further avoided.

The invention discloses a multifunctional safe guillotine which mainly comprises following circuits, opening and closing of the guillotine are identified by an opening and closing instruction and controlled by a control circuit so that opening and closing manners of the guillotine are restriction mode control. A zero-past pulse instruction signal is obtained by a zero-past sampling circuit, thereby an impact phenomenon of voltage and current is not generated on the circuit when the guillotine is opened or closed, and the instruction signal provides a count time for work time sequence of an arc suppression circuit and an operation circuit; an automatic switch between a contactless work mode and a contact work mode is timely done by a count control circuit, the arc suppression, operation circuits and a closing control circuit, so that the guillotine is in the contactless work mode when turning on and turning off power source to avoid generation of an impact phenomenon of electric arc and current; the guillotine is in the contact work mode when being in normal operation, thereby solving a problem of temperature increase during operation process. A safe locking function and a plurality of protection functions further increase safety and reliability for the usage of the guillotine.

The invention discloses a single-magnet arc-extinguishing relay, and belongs to the technical field of relays. The single-magnet arc-extinguishing relay comprises an arc-extinguishing chamber shell, astatic contact, a movable contact, and a lifting device for driving the movable contact to move up and down, wherein a containing groove is formed in the arc-extinguishing chamber shell; an arc-extinguishing magnet is arranged in the containing groove and is located between the static contact and the movable contact; the magnetic field direction in the arc-extinguishing magnet is perpendicular toor approximately perpendicular to the direction of the electric current; and at least one magnet is also arranged in the containing groove and is at least distributed at one side of the arc-extinguishing magnet. The single-magnet arc-extinguishing relay can solve the arc phenomenon often occurring in relay products by requiring only one of the most common magnets. Regardless of the polarity direction of the magnet installation, the production efficiency can be greatly improved. As only one magnet is needed to achieve the arc extinguishing effect, the production cost is greatly reduced.

The invention relates to a fuse, which is provided with a first casing and a second casing, wherein the first casing and the second casing are mutually combined, an accommodating chamber is formed between the first casing and the second casing, a disconnecting device is arranged between the first casing and the second casing and is provided with two electrodes and a fusing part, each electrode is provided with a first sheet body, a side sheet body and a second sheet body which are mutually connected so that the occurrence of fracture or poor contact condition of the electrodes in the use process is avoided, the fusing part is positioned in the accommodating chamber and can be completely disconnected through the accommodating chamber, the occurrence of the electric arc phenomenon is avoided, and the use safety is ensured.

The invention provides a waterproof safe socket and a waterproof safe plug capable of protecting children against electric shock. The safe socket is provided with an insulation outer shell, an insulation rotating core, a movable clamping pin, a spring and a power supply clamping lug, and the safe plug comprises an insulator and a bipolar electrode or a tripolar electrode. The insulation outer shell is movably connected with the insulation rotating core in a sleeved mode, a power supply in the socket is hidden through the rotation of the insulation rotating core when the socket and the plug are separated, electric shock accidents due to the fact that the children insert the fingers or conductors into the power supply are avoided, and the power supply is also sealed completely when the socket and the plug are connected in an inserted mode and work to avoid electric arc phenomena. The upper end protruding edge of the insulation outer shell and the upper end cover edge of the insulation rotating core are connected in an up-and-down sleeved mode, and thus liquid is prevented from being sprayed in to cause short-circuit or electric leakage accidents. The plug and all the plugs of traditional national standard bipolar plugs or tripolar plugs which are used by people in the world at present, and all the plugs of German standards, American standards, Italian standards, Britain standards, South African standards Switzerland standards and the like can be converted and used, an electric wire of the safe plug can be adjusted by 180 degrees, and the ideal effects of safety, practicality and compatibility are achieved scientifically.

The invention discloses a novel ceramic plug and an electrostatic chuck device having the novel ceramic plug, belonging to the field of semiconductor wafer processing equipment. The novel ceramic plugincludes an upper portion of the ceramic plug, a porous ceramic column and a ceramic sleeve connected in order from top to bottom, wherein the upper portion of the ceramic plug includes a cylindricalportion and an annular boss portion disposed at the upper portion of the cylindrical portion, the middle portion of the annular boss portion is provided with a first cooling gas hole, the middle portion of the cylindrical portion is provided with a second cooling gas hole, and the middle portion of the ceramic sleeve is provided with a third cooling gas hole. The invention is capable of avoidingthe arc phenomena generated at the cooling gas holes of the cooling gas uniformly distributing plate of the electrostatic chuck.

The embodiment of the invention provides a communication method and a communication device in order to solve a problem of an arc phenomenon generated when a charging line is pulled out. The communication method comprises the steps of obtaining the transmission time length of a target message to be transmitted, wherein the target message includes data transmitted when a charging device charges a terminal; if the transmission time length is greater than or equal to a preset time length, dividing the target message into M data blocks, wherein the transmission time length of each data block in theM data blocks is less than the preset time length, and M is a positive integer; and sequentially transmitting the data blocks according to a target time interval.

An explosion-proof protection structure for a dangerous gas environment of a laser radar comprises a first outer cover and a second outer cover, the first outer cover and the second outer cover are fixedly connected through bolts, an installation frame is welded to the outer surface of the first outer cover, and notches are formed in the positions, located on the two sides of the installation frame, of the outer surface of the first outer cover. The technical key point is that the outer surface of the laser radar is provided with a radar shell and is combined with a first outer cover for use,so that multi-layer protection of the laser radar is realized; the rubber inner sleeve in the radar shell is tightly attached to the outer surface of the laser radar and buffers impact force from theoutside, and the explosive-proof protection effect is achieved. The glass cover, the glass inner plate and the glass pressing plate are used in a combined mode and are all made of explosion-proof glass materials, so that the explosion-proof effect can be achieved while normal use of the laser radar is prevented from being affected. And meanwhile, the glass cover is spirally mounted, so that the position of the glass inner plate is fixed, and subsequent replacement operation is facilitated.

The invention provides a CPLD-based protection relay in AC (Alternating Current) and an open-phase protection system. The open-phase protection system comprises a signal acquisition module, a CPLD logic processing module and a thyristor control protection module, wherein the signal acquisition module converts an AC signal and a state into a processible weak current signal, and transfers the weak current signal to a CPLD logic processing module; the CPLD logic processing module can judge the state of AC through a collected signal, output a corresponding signal to the thyristor control protection module according to the current state; once an open phase is detected, single thyristor is closed immediately to protect the relay, then the relay is disconnected, a pulse string is stopped immediately, unidirectional silicon is disconnected to protect the entire circuit and load. The system solves the problem of electric arc generated when the relay is closed or opened, is flexible in use, and can play a protection role on the entire circuit and load.

The invention provides an ultramicro-fuse and a manufacturing method thereof. In the invention, a first electrode, a conductive part and a second electrode are printed in a fuse circuit; the fuse is arranged in a pipeline, a first metal cap and a second metal cap are covered at two ends of the pipeline respectively; the pipeline, the first metal cap and the second metal cap are covered by an insulating layer; the fuse uses the printed circuits, so that consumption of metal materials can be reduced in manufacture, production cost is reduced, and electric arc can be avoided when the fuse is fused. Therefore, the ultramicro-fuse has the advantages of high yield, high quality and high safety.

The invention discloses a vehicle power supply safety optimization method. The vehicle power supply safety optimization method comprises the following steps of: judging whether emergency switches are disconnected or not; if yes, grounding the D+ terminal of a generator; and disconnecting a battery. Thus, according to the vehicle power supply safety optimization method disclosed by the invention, if the emergency switches are judged to be disconnected, the D+ terminal of the generator is grounded, and the generator stops running due to the grounding of an excitation circuit, so that the generator stops working, and then the battery is disconnected; and on one hand, the D+ terminal of the generator is grounded firstly, and the generator stops running due to the grounding of the excitation circuit, so that the current generated by the generator due to inertia cannot enter a vehicle circuit, the situation that the vehicle circuit is impacted by a back electromotive force due to only disconnection of the battery is avoided, an electric arc phenomenon is avoided, and the power supply safety of a vehicle is improved. The invention further discloses a vehicle power supply safety optimization device and an automobile comprising the same, which have the same technical effects as those of the vehicle power supply safety optimization method.

The invention provides a super-start water jet loom comprising a loom body (800) and a water treatment device; the loom body (800) and the water treatment device are all positioned on a set working site; the working site is provided with a waste water tank (700); the loom body (800) is arranged on the waste water tank (700) in a spanning manner; the water treatment device is distributed on one orboth sides, positioned along the width extension direction, of the waste water tank (700); the water treatment device includes a control box (400), a control panel (401) is arranged in the control box(400), and the control panel (401) includes a loom super-start control system. In the super-start water jet loom disclosed in the invention, space of a box body is reasonably distributed, an originally narrow walkway can be prevented from being occupied by too many parts on one side. Two phase over-modulation technologies are adopted in the loom super-start control system, a modulation ratio is increased, the amplitude value of fundamental wave voltage is compensated, IGBT switching frequency can be lowered, and switching loss can be reduced.

The invention relates to the technical field of electric welding machine ground clamps, and discloses an electric welding machine grounding clamp which comprises a frame body, a clamping hand is movably installed on the side wall of the frame body, a reset torsion spring is fixedly installed on one side of the clamping hand, the clamping hand is movably installed on the frame body through the reset torsion spring, and a negative electrode wire is fixedly installed on one side of the frame body. A pressure generating cavity with an opening in one side is formed in the inner wall of the frame body, a power transmission block is movably installed on one side of the inner wall of the frame body, and a permanent magnet block is fixedly installed on the inner wall of the power transmission block. The permanent magnet block and the electromagnetic coil are installed in the frame body, so that in the working process, the permanent magnet block and the to-be-welded plate are attracted, a channel is formed between the electromagnetic coil and the to-be-welded plate, magnetism generated when the electromagnetic coil is powered on repels the permanent magnet block, negative pressure is generated in the pressure generation cavity, and the electricity transmission block is tightly attached to the to-be-welded object all the time; therefore, the electric arc phenomenon caused by poor contact is avoided, and finally the purpose of increasing the clamping force is achieved.

The invention discloses an electric arc prevention power connector and a split type cooking pot. The electric arc prevention power connector comprises a lower cover, an upper cover assembled on the lower cover, a conductive elastic sheet fixed on the lower side surface of the upper cover, and a sliding cover located between the upper cover and the conductive end of the conductive elastic sheet; the sliding cover is provided with a second plugging hole corresponding to the first plugging hole, and one tail end of the sliding cover is arranged in an electrical cavity through a first elastic piece capable of moving horizontally; the hole wall of the second plugging hole is provided with a guide part which pushes the sliding cover to enable the first elastic piece to be compressed when the guide part is subjected to downward acting force, and the guide part is located under the first plugging hole when the first elastic piece is not compressed; and a microswitch is arranged in the electrical cavity, and a reed of the microswitch is located under the conductive end of the conductive elastic piece. By delay triggering of closing of the microswitch, a conductive needle and the conductive elastic piece are in an uncharged state when making contact, the electric arc phenomenon is prevented, the service life is prolonged, and the use safety is improved.