113results about How to "Conducive to extinguishing" patented technology

The invention relates to an automatic tuning method of a preset arc suppression coil, which comprises the following steps: further calculating the off tuning degree and the damping ratio of a power grid through measuring the change on the unbalanced voltage of the power grid; measuring the unbalanced voltage at the neutral point of the power grid and a certain line voltage value of the power grid during the normal operation of the power grid, calculating and monitoring the change on the relative unbalance degree of the power grid to judge whether the off tuning degree of the power grid is changed, i.e. whether the power grid requires line delivering and switching operations, and deciding whether the off tuning degree and the damping ratio of the power grid are newly measured; when the off tuning degree and the damping ratio of the power grid are measured, firstly measuring the unbalanced voltages of the power grid, then, controlling a tuned arc suppression coil to increase and output compensating current (electrical susceptance) for the power grid by a controller, and finally, measuring the unbalanced voltage of the power grid and calculating the off tuning current and the damping ratio of the power grid. The arc suppression coil is adjusted according to the measured off tuning current of the power grid to output the compensating current and then the currently running off tuning current of the power grid is further calculated again so as to validate that the currently running tuning current of the power grid is smaller than the setting valve of the off tuning current.

The invention discloses a zero arc extinguishing device. The arc extinguishing device comprises an arc separation cover, an arc striking sheet, two arc separation walls, grid sheets and one or more than one group of arc extinguishing sheets, wherein each group of arc extinguishing sheets comprises an insulating frame, an arc extinguishing plate and a de-ionization net. The top parts of two arc extinguishing walls are connected through the arc separation cover; two or more than two pairs of longitudinal slots are machined on the inner walls of the two arc separation walls; the two or more than two grid sheets are sequentially inserted into the slots forwards and backwards; and the arc striking sheet is inserted into the slots at the end parts of the arc separation walls. The one or more than one group of arc extinguishing sheets is installed between the top parts of the grid sheets and the arc separation cover. In order to increase a cooling area of the grid sheets on electric arcs, the tops of the grid sheets abut against the insulating frame, the bottoms of the grid sheets are arranged stepwise along an inclining surface of the arc striking sheet without contacting the arc striking sheet, and the length of the grid sheets can reach the range from 1/2 to 2/3 height of an arc extinguishing chamber. Compared with the traditional arc extinguishing chamber, the arc extinguishing device can realize the effects of small size, high breaking and zero arc.

The invention discloses an isolated fireproof power distribution cabinet which comprises a cabinet body, the upper end of the cabinet body is provided with a liquid storage tank used for being filledwith a fire extinguishing agent, the upper end of the side wall of the cabinet body is symmetrically provided with sliding grooves, each sliding groove is internally and elastically connected with a sliding block through a reset spring, and each sliding block is connected with the corresponding sliding groove in a sealed and sliding mode. When a fire breaks out in the cabinet body, high-pressure carbon dioxide gas in a liquid storage tank can be quickly released and sprayed into the cabinet body by utilizing a first memory spring so as to control the fire behavior, meanwhile, a plurality of ventilation openings can be blocked; high-pressure carbon dioxide gas is prevented from escaping to the outside through the ventilation opening, carbon dioxide gas filled in the cabinet body can be stored in the cabinet body for a longer time, flames can be conveniently and thoroughly extinguished, a plurality of positions in the cabinet body can be monitored and processed in time by arranging a plurality of second control grooves and second memory springs, the fire extinguishing reaction speed of the device is increased, and the use effect is good.

The invention discloses a fireproof door. The fireproof door comprises a door frame and a door leaf arranged in the door frame, wherein the door leaf comprises an inner door sheet, an outer door sheet and a fireproof box filled with liquid fire-proofing agents; the fireproof box is located between the inner door sheet and the outer door sheet and provided with nozzles capable of penetrating through the inner door sheet and the outer door sheet respectively; a spray pipe is connected to each nozzle, and the bottom end of each spray pipe is fixed into the fireproof box; a combustible gas alarm is arranged on the inner door sheet and comprises a circuit box, a hanging frame, a guiding frame and a control circuit, wherein the circuit box is used for containing circuit elements, the hanging frame and the guiding frame are arranged on the circuit box, and the control circuit is arranged in the circuit box; the control circuit comprises a transformer, a relay, a buzzer and a thyristor, wherein the transformer is connected with an alternating current source provided by a mains supply, and the relay, the buzzer and the thyristor are sequentially connected in series between the positive output end and the negative output end of the transformer; a gas sensitive element is arranged at the top end of the circuit box and connected with a control electrode of the thyristor; a water pump is connected to a normally open contact of the relay. The fireproof door can give a warning of fuel gas and has a good fireproof property.

The invention discloses a cigarette with an extinguishing means, comprising cigarette body and filter tip, the connection place of which is equipped with ascolocular with water in inner chamber, the ascolocular is equipped with breach on end of cigarette body, the cigarette is equipped with a water conduit connected with breach and burning together with cigarette, and the water conduit extends along with the length of cigarette. The invention can effectively extinguish the stub to prevent fire hazard.

The invention relates to an automatic change-over switching apparatus, which comprises a main circuit device and a change-over operation device. The change-over operation device includes a support assembly, an electromagnet assembly and an elastic energy storage assembly mounted on the support assembly, and a rotating shaft assembly connected with the electromagnet assembly and the elastic energystorage assembly. The rotating shaft assembly includes a rotating shaft rotationally mounted on the support assembly and an eccentric wheel mounted on the rotating shaft. The rotating shaft extends out of the support assembly and is connected with a moving contact assembly of the main circuit device to drive the moving contact assembly to rotate. When the electromagnet assembly is powered on, therotating shaft assembly is driven to rotate to storage energy for the elastic energy storage assembly. After the electromagnet assembly is powered off, the eccentric wheel drives the rotating shaft tocontinue to rotate in the same direction by using the inertia thereof under the combined action of the elastic energy storage assembly. Therefore, large-rotation-angle movement of the rotating shaftassembly is realized, the opening distance of the connected moving contact assembly is increased, and the breaking index can be improved.

The invention discloses a circuit breaker tripping moment control method for inhibiting a secondary arc current. When a special/super transmission line breaks down, protection is started, then a phaseselection procedure is carried out, when the fault type is a single-phase grounding fault, fault segment judgment and delay are conducted, and whether an outlet should trip or not is judged; and if the outlet is protected, the circuit breaker tripping time is obtained from an intelligent control assembly of a circuit breaker or an online monitoring system, a non-fault phase line voltage phase position is monitored to generate a tripping command at the best moment, thus when the non-fault phase line voltage is 0, a main contact of the circuit breaker is disconnected, and the purpose of inhibiting the secondary arc current is achieved. According to the method, the single-phase reclosing success rate can be increased, safe operation of a system is guaranteed, and additional investment does not need to be increased.

The invention discloses a fault restarting method for a parallel multi-terminal direct-current transmission line. The method comprises: a branch station connected with a faulty direct-current transmission line is selected as a leading station for fault restarting of the direct-current transmission line; all convertor stations control converters to extinguished fault currents and then the leading station is isolated from a terminal station with a VSC converter and a branch station of a terminal system by using switching equipment; and then the main station starts to establish a direct-current transmission line voltage, the connection and power of the whole parallel multi-terminal direct-current transmission system are restored if the direct-current transmission line voltage is established successfully, the faulty direct-current transmission line is isolated if the direct-current transmission line voltage establishment fails, and the connection and power of the rest of parallel multi-terminal direct-current transmission system are restored. With the method disclosed by the invention, after a direct-current transmission line fault occurs, the fault current is extinguished rapidly andthe power supply of the parallel multi-terminal direct-current transmission system is restored to the greatest extent; and the influence of station-to-station communication existence among all convertor stations is avoided.

The invention discloses a high-efficiency air purifier which comprises a machine shell, a primary filter net, an electrostatic dust collection box, a plasma catalysis net and a fan. An air inlet is arranged at the upper end of the machine shell, an air outlet is arranged at the lower end of the machine shell, the air inlet and the air outlet are communicated by an air flowing passage, the primary filter net, the electrostatic dust collection box and the plasma catalysis net are detachably mounted in the machine shell and sequentially arranged in the air flowing passage along the air flowing direction, the fan is mounted in the machine shell and positioned at an air outlet of the air flowing passage, an angle of intersection between the electrostatic dust collection box and the air flowing direction is an acute angle, and the plasma catalysis net comprises a catalysis net body and an ozone catalyst adhered on the catalysis net body. The high-efficiency air purifier can increase working area of the electrostatic dust collection box as far as possible in a limited space, and is higher in purifying efficiency and better in purifying effect when compared with air purifiers in equal size.

The invention relates to the technical field of ashtrays, and in particular, relates to an ashtray which comprises a base, a rotating mechanism, a fire extinguishing mechanism and an adsorption mechanism. A movable seat is rotated through non-slip mats on the two sides of the outer side wall of the movable seat, so the movable seat slides in a sliding groove in the top of the base through a sliding block; an opening at one end of the movable seat rotates to one side of a connecting plate at one end of an inner cylinder, and the connecting plate coincides with the opening,, so smoke emitted bya cigarette end is stored in the placing groove; smoke diffusion and influence on body health in the extinguishing process are avoided, the movable base is pressed to drive the whole body to be clamped into the base, smoke in the gas collecting groove can be well pressed down, excessive smoke caused by excessive smoke in the gas collecting groove is prevented, further, the overall size can be reduced, and meanwhile, smoke in the movable base can be treated.

The invention discloses a device for collecting smoke generated during moxa-moxibustion. The smoke generated during the moxa-moxibustion can be collected by using the device, and exhausted outdoors through a venting pipe, thus the smoke and the smell are prevented from dispersing to influence doctors and patients during moxa-moxibustion. The device has the advantages: the collected moxa-moxibustion smoke can be exhausted outdoors through the venting pipe; heights of moxa sticks can be flexibly regulated so as to flexibly and conveniently control moxa-moxibustion temperature and the positions of the moxa sticks are not easy to change when the heights of the moxa sticks are regulated, and the moxa sticks can be ensured to be always fixedly aligned to some acupoints; the device has spotted thermal effects during the moxa-moxibustion and a pointing effect, is easy to generate a sensation propagation phenomenon, has strong moxibustion sensation and moxibustion effect which is basically similar to the moxibustion effect of mutual suspending moxibustion; structure and manufacture process are both simple; the device is convenient for cleaning; and the moxa sticks can be conveniently extinguished, and can be ignited again conveniently in next time.

A radio frequency detection system is provided that includes at least two radio frequency detection devices, which have an antenna each with a detection range for a radio frequency identification and detect the radio frequency identification information provided in the detection range. The radio frequency detection system is designed to attenuate a detection range of a detecting radio frequency detection device in the detection range of the at least one other radio frequency detection device by means of a compensation member such that the radio frequency identification cannot be detected by the detecting radio frequency detection device in the detection area of the at least one other radio frequency detection device. The compensation member feeds a compensation current to the at least one other antenna to generate an opposing magnetic field, which attenuates or extinguishes the magnetic field of the detecting antenna in the at least one other detection range, by the at least one other antenna in the at least one other detection range.

The invention relates to the field of living articles and discloses an environmental-friendly ashtray which comprises a box body, wherein one side of the top of the box body is moveably sleeved by holding tubes; the number of the holding tube is four; the four holding tubes are in symmetry with the axis center of the box body; pressing plates are fixedly connected with tops of the holding tubes; passive plates are moveably sleeved inside top ends of the holding tubes. By adopting the environmental-friendly ashtray, cigarette ends are put into the holding tubes from cigarette holes, the holdingtubes are driven to move downwards by moving the pressing plates downwards, the cigarette ends in the holding tubes are extruded by moving plates together with the passive plates, then the cigaretteends can be completely extinguished, till the cigarette holes are positioned on one sides of push blocks, lifting rods are moved upwards to move up the passive plates, under the action of elastic force of push springs, the cigarette ends are pushed outside the holding tubes by the push blocks, then the problems that in the use process of a common ashtray, a cigarette end put into the ashtray by auser is not completely extinguished, then the cigarette end is continuously combusted and emits smoke in the ashtray, and the air has heavy smoke smell, can be avoided.

A warming moxibustion rod comprises a warming moxibustion head component, a connection component and a moxa strip clamp component, wherein the warming moxibustion rod component comprises an outer rotary head, an inner rotary head, a first magnetic therapy ring, an elastic ring and a second magnetic therapy ring; the outer rotary head is sheathed on the inner rotary head; the first magnetic therapyring and the elastic ring are successively installed on the upper part of the inner side of the outer rotary head; the elastic sheet installed on the elastic ring is embedded in the closing reset hole installed on the upper part of the inner rotary head; the second magnetic therapy ring is installed on the lower part of the inner side of the inner rotary head, and an air vent installed on the inner rotary head can be opened or closed through the relative rotation with the outer rotary head and the inner rotary head.