115results about How to "Conducive to extinguishing" patented technology

The invention discloses a multi-gap self-swelling strong-air-current longitudinal blow-out arc anti-thunder protecting device which comprises a longitudinal blow-out arc device arranged at an insulator string earthing terminal through a grounding side connecting hardware fitting, a grounding side electrode arranged on the longitudinal blow-out arc device, and a guide line side electrode arranged on an off-contact guide line. A protecting gap formed by the grounding side electrode and the guide line side electrode is parallel to an insulator string. The longitudinal blow-out arc device comprises an arc extinguishing device body and arc extinguishing tubes. The arc extinguishing device body is provided with a plurality of through holes for placing the arc extinguishing tubes. An angle formed by two arc extinguishing tubes which are arranged in the arc extinguishing device body is 90 degrees, and end portions of the two arc extinguishing tubes are in contact with each other. Each arc extinguishing tube is in a spiral shape. The grounding side electrode is connected with a first arc extinguishing tube through a guide line, and the grounding side connecting hardware fitting is connected with a last arc extinguishing tube through a guide line. The device is simple in structure, low in manufacture cost, safe and reliable, effectively reduces the power system transmission line thunderstrike tripping rate and the accident rate, and improves the stability of a power system.

The invention discloses a vacuum circuit breaker based on a T-shaped double break vacuum arc-extinguishing chamber, which can effectively reduce the cost, improves the voltage withstanding level of a single arc-extinguishing chamber, is easy to be in series connection to form an ultrahigh-voltage and superhigh-voltage vacuum circuit breaker. The vacuum circuit breaker comprises a vacuum arc-extinguishing chamber, an insulated ceramic column, an operating mechanism and a control case, a control signal input end is arranged on the control case, the insulated ceramic column is internally provided with an insulated connection rod which is connected with the operating mechanism, the upper end of the insulated connection rod is connected with a movable conducting rod in a guiding sleeve, the upper end of the movable conducting rod is connected with a movable contact connecting board which is arranged in the vacuum arc-extinguishing chamber, the transverse left end and the transverse right end of the movable contact connecting plate are respectively and correspondingly provided with a left movable contact and a right movable contact, a left static contact and a right static contact are correspondingly and fixedly arranged on the left movable contact and the right movable contact, the left static contact is connected with an incoming line, the right static contact is connected with an outgoing line, and bushings are sleeved on the incoming line and the outgoing line.

The invention discloses a gas injection type parallel gap device. The protection device belongs to the field of lightening protection gap for power transmission lines of alternating-current and direct-current electric power systems. The device is connected with the two ends of a power transmission line insulator chain in parallel, under a lightening stroke, the device is broken down before the insulator chain can be broken down, and thus the insulator chain and the corresponding power transmission line can be protected; moreover, a high-speed high-voltage gas flow can be generated fast and acts on arcs to restrain formation and development of the arcs, the arcs are extinguished in a transient state, and thus the lightning trip-out rate and the lightening accident rate of an electric power system are reduced. The gas injection type parallel gap device comprises arc-control devices on the grounding side and the wire side, fixing devices and parallel spiral fittings installed at the two ends of the insulator train of the line. The arc-control device on the grounding side and the arc-control device on the wire side respectively comprise an arc extinguishing powder storage chamber, an arc air-termination ring, an insulating gas generation chamber, an arc spray channel and the like. With the device, the stability of the electric power system is improved, the on-load action frequency of a breaker is effectively reduced, the service life of electric power equipment such as a transformer is prolonged, and production, operation and maintenance cost is very low.

The invention relates to a spring operating mechanism matched with a 126kV vacuum high-voltage circuit breaker, the invention designs the contour trajectory of a cam to achieve the best match of the output characteristics and the load characteristics; when in closing process, the speed at instant of touching is controlled in the reasonable range to effectively reduce the closing bounces, and the mechanism can also be ensured to overcome the reaction force of a contact spring at the end of the closing; the design of the size and the position of an oil drain hole on a wall of a buffer can allow the circuit breaker to ensure higher speed at instant of touching during the opening process to allow an arc-extinguishing chamber to rapidly enter the short arcing time, thus allowing the average speed to be maintained within a certain range, ensuring the long arcing time of the circuit breaker and further being conductive to the arc extinguishment; the spring operating mechanism can solve the problem of poor match of the output force of the mechanism in the past with the load characteristics of the vacuum circuit breaker, reasonably distribute energy to the overall motion process of the circuit breaker and reduce the opening and closing works of the mechanism.

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 relates to a direct current quick breaker, in particular to a direct current quick breaker with high requirement for short circuit breaking current. The breaker comprises a breaker body and an arc extinguish chamber, wherein the arc extinguish chamber comprises a pair of insulated shells and an arcing ring; the cavity of the arc extinguish chamber comprises a metal grid, an insulated grid and a transverse clapboard; the metal grid and the insulated grid are positioned in the middle of the arc extinguish chamber; the transverse clapboard is positioned on the upper part of the arc extinguish chamber; one side, which faces the bottom of the arc extinguish chamber, of the metal grid is a lower side provided with a notch having a downward opening; and two types of metal grids, namely a straight-panel metal grid and a U-shaped metal grid are provided. The breaker has the advantages of quickly establishing arc voltage, reducing the resistance of electric arc entering the arc extinguish chamber, lengthening electric arc, shortening arcing time, enhancing arc extinguishing capability of the arc extinguish chamber, along with simple structure, small overall dimension, convenient assembly and maintenance and the like.

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 an arc extinguish chamber for a sulfur hexafluoride circuit-breaker. The arc extinguish chamber comprises an insulation tube, an upper line outlet seat, a lower line outlet seat, an upper static contact device, a lower static contact device and a moving contact device, wherein the upper line outlet seat is poured at the upper end of the insulation tube; the lower line outlet seat is poured at the middle end of the insulation tube; the upper static contact device is connected with the upper line outlet seat; the lower static contact device is connected with the lower line outlet seat; the moving contact device is arranged in the insulation tube; the moving contact device comprises a spray nozzle, a moving arc contact, a moving main contact, an air cylinder, a support frame and a piston rod; the piston rod is respectively connected with the upper end and the lower end of the support frame and the moving arc contact; the air cylinder is arranged at the upper end of a boss of the support frame and in a sealed air chamber which is formed by the inner wall of the air cylinder, the outer wall of a piston of the lower static contact device, and the outside wall of the piston rod; the static arc contact is in plug-in contact with the moving arc contact; the static arc contact is inserted into the moving arc contact; the moving arc contact is in a rose-shaped structure; and the inside diameter of the moving arc contact is slightly smaller than the outside diameter of the static arc contact. The arc extinguishing chamber for the sulfur hexafluoride circuit-breaker has reliable interruption performance and abundant arcing interval, so that the reliable and safe interrupting can be ensured at different current levels.

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 provides a dust remover and belongs to the technical field of machinery. The dust remover solves the problem that an existing dust remover is easy to explode in the use process. The dust remover of an improved structure comprises a dedusting box and an ash storage box located below the dedusting box. The dedusting box is fixedly connected with the ash storage box. The dedusting box comprises a dedusitng cavity and an air purifying cavity. The dedusting cavity is internally and fixedly connected with a filtering bag. The dust remover is characterized in that the bottom of the dedusitng box is provided with an ash collection channel communicated with the ash storage box, the dedusting box is provided with an ash discharging mechanism capable of controlling the connected state or the cut-off state of the ash collection channel, the ash storage box is provided with a primary air inlet and a primary air outlet which are communicated with an inner cavity of the ash storage box, the dust remover further comprises a plurality of vertical supporting pipes vertically arranged, and the primary air outlet is communicated with the upper portion of the dedusting cavity of the dedusting box through the vertical supporting pipes. By means of the dust remover of the improved structure, explosion in the use process can be prevented, and safety performance is improved.

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.

This invention relates to an induction-adjustment type automatic tuning, arc-suppression voltage-limiting device, being of a transformer direct connecting neutral point of electric power system. It has earthing type primary coil and two or more than two groups of high impedance secondary coil (with fine turing and coarse tuning); computer signal sources are in the current mutual inductor and voltage mutual inductor of said primary coil; the computer controls the switching of the fine tuning and coarse tuning. In this invention, single-phase transformer is used to realize precompensation and follow-up compensation during the production of capacitive current at primary earthing condition; the embodiment is that: PC-104 computer calculates the capacitive current of the system, and then controls the fine tuning and coarse tuning, proceeds compensation of the capacitive current.

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 relates to a fault-arc identification unit for a low-voltage electric circuit, having: at least one voltage sensor for the periodic determination of electric voltage values (un, un-1) ofthe electric circuit; and at least one current sensor for the periodic determination of current values (in, in-1) of the electric circuit. Both sensors are connected to an evaluation unit which is designed such that it has as a first criterion a change in the voltage over time which exceeds a first threshold value (SW1) or falls below a second threshold value (SW2), and as a second criterion a change in the increase of current which exceeds a third threshold value (SW3) or falls below a fourth threshold value (SW4). If both criteria are fulfilled, a fault-arc identification signal is emitted.

The invention relates to an intelligent light-emitting zebra crossing, an intelligent light-emitting zebra crossing control system and a method. The intelligent light-emitting zebra crossing comprisesa plurality of zebra crossing units and a first groove arranged in a pedestrian area of a road surface at parallel intervals, wherein the zebra crossing units are arranged in the first groove one byone correspondingly. The zebra crossing unit includes an LED light source and a transparent concrete layer matched to the first groove, The LED light source is arranged at the bottom of the corresponding first groove, the transparent concrete layer is arranged one by one in the first groove, and the upper surface of the transparent concrete layer is arranged at the same height as the pavement, andthe LED light source is electrically connected with an external power supply through a switch. The intelligent light-emitting zebra crossing of the invention, At the same time, the transparent concrete layer can effectively protect the LED light source, enhance the compression resistance and durability of the entire zebra crossing, and has simple structure and low cost, and is suitable for large-scale popularization. The LED light source can emit light through the transparent concrete layer and illuminate the pedestrian area on the pavement, thereby facilitating the passage of vehicles and pedestrians.

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 an ungrounded system fault line selection method utilizing zero-sequence current multiplication characteristics. The method comprises the following steps of: monitoring neutralpoint voltage of a grounded transformer and three-phase voltage values of a bus in real time, judging a size relationship between zero-sequence voltage of the bus and a protection setting value, anddetermining whether to start a single-phase grounding fault line selection device or not; collecting bus zero-sequence voltage and zero-sequence current of all lines, selecting a fault phase accordingto the relationship among the phase voltage amplitudes UA, UB and UC, and switching on a bus switch K1 of the fault phase; collecting zero-sequence currents of all lines again, judging whether the zero-sequence currents are true or not, determining whether the switch K2 is switched on or not, and inputting a resistor RN into the neutral point of the power distribution network; collecting zero-sequence currents of all lines, opening the action of the fault phase bus switch K1, collecting the zero-sequence currents of all lines again, judging whether the zero-sequence currents are true or not,and determining a fault line; and exiting the neutral point small resistor RN, and ending line selection. The problem that single-phase earth fault line selection of a neutral point ungrounded systemis difficult is solved.

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 relates to an ashtray, especially relates to an ashtray equipped with cigarette extinguisher. It comprises ashtray and cigarette extinguisher; cigarette extinguisher is facilitate for users extinguishing cigarette and it can be installed to form an integral with ashtray, or connected with ashtray; cigarette extinguisher is equipped with a plurality of dog-end extinguishing holes for cigarette and cigar. Inserting dog-end into relative hole and it will be extinguished. The invention is characterized by convenient dog-end extinguishments, prevention of spread of left smoke and peculiar smell, and environment protection.

The invention provides an infrared induction alarm wall lamp which comprises a bulb, an inductor control box and a plug. The bulb is installed on the inductor control box. The plug is connected with the inductor control box. A Fresnel lens is installed on the inductor control box. An inductor control circuit board is installed inside the inductor control box. A pyroelectric infrared sensor is located on the inner side of the Fresnel lens. A buzzer alarm and a buzzer remote control switch are installed on the inductor control box. A photoconductive resistor is further arranged on the inductor control circuit board and also located on the inner side of the Fresnel lens of the inductor control box. One end of the photoconductive resistor is connected with a triggering stopping end of a signal processing integrated circuit of the pyroelectric infrared sensor in an electric mode. The other end of the photoconductive resistor is connected with a third pin of the pyroelectric infrared sensor in an electric mode. The infrared induction alarm wall lamp is capable of being automatically lightened and extinguished, avoids power waste, is simple and reliable in working, avoids incorrect operation, is convenient to assemble and disassemble, and meanwhile has the function of alarm.

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 a static contact arc extinguishing module with double arc extinguishing chambers for a circuit breaker. The static contact arc extinguishing module comprises a static contactand an arc extinguishing component, wherein one end of the static contact is provided with a rectangular bending current limiting part; the bending current limiting part is provided with a static contact; the other end of the static contact is provided with a straight wiring plate part; the arc extinguishing component includes an insulating cover, a magnetizing plate, a first arc extinguishing chamber and a second arc extinguishing chamber; the middle part of the insulating cover is provided with a magnetic blowing chamber wrapping the outside of the static contact; the magnetic blowing chamber communicates with the inside of the first arc extinguishing chamber; one end of the magnetizing plate is provided with a U-shaped bending part wrapping both sides of the static contact; the other end of the magnetizing plate is provided with an upward bending arcing foot; two ends of the bending part pass through the bending current limiting part, and are inserted into both sides of the magneticblowing chamber; and a tail part of the arcing foot passes through the magnetic blowing chamber and extends into the first arc extinguishing chamber. The static contact arc extinguishing module has the advantages of simple structure, stable and reliable performance, convenience in assembly, and capabilities of effectively prolonging the service life of circuit breakers and improving the breakingcapacity of the circuit breaker.

The invention relates to a vacuum circuit breaker, and especially relates to a double-side breaking technique for a vacuum circuit breaker. The technique can lower the operating power of an operate mechanism and has high-breaking performance. The vacuum circuit breaker comprises a vacuum circuit breaker body. The vacuum circuit breaker body comprises a double-side magnetic drive mechanism, an electrode system and a double-side main conductive loop. The electrode system comprises a first movable electrode component and a second movable electrode component. The double-side magnetic drive mechanism comprises a first magnetic drive mechanism and a second magnetic drive mechanism. The double-side main conductive loop comprises a first main conductive loop and a second main conductive loop. The first magnetic drive mechanism is connected to the first movable electrode component and drives the first movable electrode component to realize connecting with or disconnecting from the second movable electrode component through relative movement. The second magnetic drive mechanism is connected to the second movable electrode component and drives the second movable electrode component to realize connecting with or disconnecting from the first movable electrode component through relative movement.

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 discloses a DC relay, and belongs to the technical field of relays. The DC relay comprises a bottom plate assembly, a housing assembly forming an accommodating space with the bottom plate assembly, two main static contacts, an active assembly, a connecting column assembly and a shielding case, wherein the two main static contacts are arranged on a main body part of the housing assembly at intervals; the active assembly comprises a poking part and a main moving contact, wherein the main moving contact can be in intermittent contact with the main static contact, and when the main moving contact makes contact with the main static contact, the poking part in the connecting column assembly can poke and trigger a microswitch in the connecting column assembly; the shielding case islocated in the accommodating space, and the shielding case divides the accommodating space into a first space and a second space; and the main static contact extends into the first space, the main moving contact is located in the first space, the microswitch is located in the second space, and the connecting column extends into the second space. The DC relay provided by the invention can prevent the influence on the microswitch when the main moving contact and the main static contact are switched on and off, so that the on-off condition of the DC relay can be effectively judged.

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.