55 results about "Arc blow" patented technology

A welding system configured to eliminate effects of arc blow in a welding operation. The welding system comprises welding circuitry, preheat circuitry, a drive roller, and control circuitry configured to perform a reciprocation cycle. The reciprocation cycle may include the steps of: advancing a filler material toward the welding work piece until the filler material is electrically connected to the weld pool; supplying the preheat power to heat the filler material while the filler material is electrically connected to the weld pool; retracting the filler material away from the welding work piece until the filler material is not electrically connected to the weld pool; and terminating supply of the preheat power to the filler material while the filler material is not electrically connected to the weld pool.

The utility model discloses a relay which comprises a contact part and an arc blowing assembly. The contact part comprises two contact assemblies, and each contact assembly comprises two static contacts and a movable contact piece used for making contact with or being separated from the static contacts. The arrangement direction of the two static contacts of the contact assembly is defined as a first direction, the movement direction of the movable contact piece is defined as a second direction, the first direction is perpendicular to the second direction, and the direction perpendicular to the first direction and the second direction is defined as a third direction; the plurality of contact assemblies are arranged along a third direction; the arc blowing assembly comprises four permanent magnets, and the four permanent magnets are located on the two sides of the contact part in the first direction respectively and correspond to the four static contacts in position respectively. Wherein the magnetic poles of the surfaces, facing each other, of the two permanent magnets corresponding to the same contact assembly are opposite, and in the third direction, the magnetic poles of the surfaces, facing the corresponding static contacts, of the two adjacent permanent magnets are opposite.

The invention discloses a primary and secondary fusion ring main unit, and relates to the technical field of ring main units, the primary and secondary fusion ring main unit comprises a ring main unit body, an outer shell is fixedly connected in the ring main unit body, and an inner shell is fixedly connected in the outer shell; a partition plate used for dividing the space between the outer shell and the inner shell into an upper cavity and a lower cavity is fixedly connected between the outer shell and the inner shell, a pressure sensor is installed on the outer portion of the inner shell, and a pressure relief mechanism used for releasing pressure in the inner shell is further included. The conveying mechanism comprises an electric telescopic rod fixedly installed on the inner wall of the outer shell, environment-friendly gas in the lower cavity is conveyed into the inner shell through the conveying mechanism, the concentration of the environment-friendly gas in the inner shell is recovered, the insulation performance of the interior of the inner shell is improved, in addition, the environment-friendly gas can be sprayed into the interior of the inner shell under a certain pressure, and the environment-friendly gas can be sprayed into the inner shell under a certain pressure. And high-speed air flow is formed, strong arc blowing force is generated, arc extinguishing is accelerated, a contact of the load switch and other parts are protected from being ablated by the arc, and expansion of faults is restrained.

The utility model relates to the technical field of low-voltage circuit breakers, and discloses a circuit breaker with a good arc extinguishing effect, which comprises an arc extinguishing grid plate, a moving contact and a static contact, the two sides of the arc extinguishing grid plate are fixedly connected with fixed plates, the upper ends of the fixed plates are fixedly connected with a top plate, the two sides of the lower end of the top plate are fixedly connected with side plates, and the side plates are fixedly connected with the moving contact and the static contact. One side of the side plate is fixedly connected with a fixing pipe, and a sliding plate is arranged in the fixing pipe in a sliding mode. According to the utility model, the repulsive force between the electromagnet and the permanent magnet plate drives the sliding plug to compress the cavity in the fixed pipe, so that gas is discharged through the gas blowing pipe to form gas flow, the arc extinguishing reliability of the circuit breaker is improved in cooperation with the arc extinguishing chamber, and the movable plug compresses the cavity of the fixed pipe again through the cooperation of the clamping mechanism and the tension spring. The arc blowing action time is prolonged while the volume of the cavity is not increased, and meanwhile, the reverse flow of airflow is prevented by using the reverse blowing prevention plate, so that the arc extinguishing reliability is further improved.

The utility model discloses an arc extinguishing structure of a non-polar direct current contactor and a direct current contactor, and belongs to the technical field of contactors. The arc extinguishing structure comprises a fixing frame, four permanent magnets and four magnetic conductive sheets. The fixing frame is of a rectangular structure, and the four permanent magnets are embedded in rectangular holes in four side plates of the fixing frame respectively. The N poles of the two oppositely arranged permanent magnets face the interior of the fixing frame; the S poles of the other two oppositely arranged permanent magnets face the interior of the fixing frame; the magnetic conductive sheet is provided with two extending parts which are perpendicular to each other; the magnetic conductive sheets are installed at the corner positions of the fixing frame, and the two extension parts of each magnetic conductive sheet are attached to the outer surfaces of the two adjacent permanent magnets respectively. The direct current contactor comprises the arc extinguishing structure. According to the arc extinguishing structure provided by the utility model, the arc blowing space is larger, and the use stability of products is improved.

Provided are an arc extinguishing mechanism for a circuit breaker and a circuit breaking device, the arc extinguishing mechanism comprising: an arc extinguishing chamber, a first arc leading plate, a second arc leading plate, and a first arc blowing coil, wherein a first end of the first arc leading plate is configured to be connected to a static contact support portion of the circuit breaker, and a second end extends to one side of the arc extinguishing chamber; a first end of the second arc leading plate is close to a moving contact area of the circuit breaker, and a second end extends to the other side of the arc extinguishing chamber opposite to the one side; a first end of the first arc blowing coil is connected to the static contact support portion, and a second end is configured to be electrically connected to a static contact side main circuit, wherein the first arc blowing coil is configured to drive an arc in the moving and static contact area and its vicinity towards the arc extinguishing chamber. The arc extinguishing mechanism can significantly improve the arc extinguishing capability of the circuit breaker.

The utility model discloses a moving contact, a static contact, a contact structure and a high voltage DC contactor, comprising a moving contact main body, the left end and the right end of the moving contact main body respectively form a moving contact part, and the middle positions of the two moving contact parts corresponding to the front side and the rear side are provided with contact avoiding grooves used for avoiding contact cooperation with the static contact end of the static contact. According to the utility model, the contact avoiding grooves are formed in the middle positions of the corresponding front and rear side edges of the movable contact part, and the static contact end of the static contact can be prevented from being in contact fit with the middle position of the movable contact part by using the contact avoiding grooves, so that the distribution position of electric arcs generated when the movable contact and the static contact are disconnected is changed; the arc generation position is kept away from the middle position where the moving contact and the static contact are in contact fit as much as possible, and therefore more arcs are distributed at the positions closer to the front side magnetic steel and the rear side magnetic steel in a concentrated mode, a stronger magnetic field is utilized to generate the arc blowing effect on the arcs, and the good arc extinguishing effect is guaranteed.

The invention belongs to the field of gas circuit breakers, and discloses a gas switch with an arcing air pressure automatic adjusting function, which comprises a switch body with a switching-on and switching-off direction and a piston rod capable of moving along the switching-on and switching-off direction; one end of the piston rod extends in the opening and closing direction, a piston rod inner cavity is formed in the piston rod, and a piston rod exhaust hole is formed in the side wall of the piston rod; the piston rod inner cavity extends in the extending direction of the piston rod and is open at one end of the piston rod, and a piston rod exhaust hole is formed in the open position. An elastic component is movably inserted into the end part of the piston rod, the elastic moving direction is matched with the opening and closing direction, and one end part of the elastic component corresponds to the inner cavity of the piston rod. Through the elastic assembly arranged on the inner cavity of the piston rod, the exhaust flow can be automatically adjusted according to the air pressure of arc hot gas, so that the air pressure of an arc combustion area is adjusted, the air pressure of arc blowing of the arc extinguish chamber is influenced, and self-adaption of the arc extinguish chamber to breaking current within a certain current range is achieved.

The present application relates to aluminum sheet metal hot welding technical field, specifically disclose a kind of aluminum sheet metal hot welding system and welding method, comprising: welding rod, one end fixedly installed with the welding torch outside gap, the other end fixedly installed with arc-shaped piece, and arc-shaped piece is coupled with transmission shaft, limiting column, equidistantly arranged in weld two sides, and one-side limiting column end and aluminum plate side wall keep adhering.This application can be self-adapted by equidistant distribution limiting column the arc shape of aluminum plate outer wall, and utilize guide rod to provide circumferential driving power to arc-shaped piece, make welding rod with molten pool as center and carry out sector movement, make welding torch self-adjustment and the included angle of weld, realize using physical components directly transfer curved surface information, meet tungsten electrode and the weld after the change of curved surface keeps angle constant, greatly weaken arc blow, argon covering abnormality and other problems, guarantee weld quality.

The utility model discloses a large-caliber low-nickel stainless steel seamless steel pipe which comprises a seamless steel pipe body, one end of the seamless steel pipe body is fixedly connected with an arc-shaped block, one side of the top end of the arc-shaped block is fixedly connected with a fixing plate, and one side of the fixing plate is fixedly connected with symmetrically-arranged arc-shaped limiting plates. The side, close to the arc-shaped limiting plate, of the fixing plate is fixedly connected with symmetrically-arranged reset springs, the ends, away from the fixing plate, of the reset springs are fixedly connected with an arc-shaped baffle, and the middle position of the top end of the arc-shaped baffle is fixedly connected with a control button. During welding, lime and water only need to be added into the reaction tank formed in the arc-shaped block, and after the lime and the water generate chemical reaction to release heat, a welding area can be uniformly heated, so that the magnetism of the welding area is reduced, and the situation that an operator is difficult to weld due to electromagnetic arc blowing caused by higher magnetism is avoided.

The present aspect relates to a high direct voltage switch comprising: a first pair (5) of contacts (6, 7); a second pair (8) of contacts (9, 10); an arc blow coil (2) configured to exert a magnetic field (B) on an arc formed between the first pair of contacts (6, 7), the switch (1) being characterized in that the blow coil (2) is electrically connected in parallel to the second pair (8) of contacts (9, 10).

The utility model discloses a gap arc blowing device, which relates to the technical field of electric power protection and comprises an insulator, a first conductive plate and a second conductive plate are respectively mounted on two sides of the insulator, a discharge electrode a is mounted on the first conductive plate, and a discharge electrode b is mounted on the second conductive plate. A discharge channel is formed between the discharge electrode a and the discharge electrode b, lightning current is guided to pass through, the lightning current is effectively guided and extinguished by combining the gap discharge effect and the arc blowing effect of the discharge electrodes, and therefore the protection effect of a lightning arrester, a line and a transformer is improved.

A method of using a tungsten inert gas (TIG) welding flux for super duplex stainless steel (SDSS) is used to solve the problems of low weld depth / width ratio, low corrosion resistance, and arc blow existing in the conventional TIG welding flux for duplex stainless steel. The TIG welding flux for SDSS includes 20-30 wt % of silicon dioxide (SiO2), 20-25 wt % of titanium dioxide (TiO2), 15-20 wt % of vanadium dioxide (VO2), 10-15 wt % of molybdenum trioxide (MoO3), 10-15 wt % of zirconium diboride (ZrB2), 5-10 wt % of aluminum nitride (AlN), 5-10 wt % of manganese carbonate (MnCO3) and 5-10 wt % of nickel carbonate (NiCO3).

The utility model discloses an electromagnetic relay, which comprises a contact assembly and an arc extinguishing permanent magnet arranged on the outer side of the contact assembly. The contact assembly comprises two reeds, one reed is a static reed and is provided with a static contact, the other reed is a movable reed and is provided with a movable contact, and the static contact is matched with the movable contact; at least one reed is provided with an insulated arc-isolating member, and the arc-isolating member isolates an electric arc generated by breaking of the contact assembly from the reed where the arc-isolating member is located in the arc blowing direction of the arc extinguishing permanent magnet. According to the utility model, the arc extinguishing requirement can be met on the basis of miniaturization and microminiaturization of a relay product, so that the product quality is improved, and the service life of the product is prolonged. According to the utility model, the arc-isolating member made of a proper material can be selected according to the magnitude of the load current, so that the arc-isolating effect of the arc-isolating member is matched with the magnitude of the load, and the arc-isolating member can still effectively isolate the arc when the load is relatively large.

The invention provides an E6011 type cellulose welding rod and a preparation method thereof. The welding rod comprises a core wire and a coating, and the surface of the core wire is coated with the coating in a pressed mode; the coating is prepared from, by weight, 10-15 parts of potassium titanate, 10-15 parts of rutile, 18-21 parts of microcrystalline cellulose, 3-5 parts of manganese metal, 5-10 parts of fused magnesite, 9-12 parts of iron sand, 30-35 parts of iron powder, 5-8 parts of CMC-Ca and 0.5-1 part of rare earth ferrosilicon. According to the coating, a titanium type slag system is adopted, and a composite blowing force system is constructed to stabilize electric arcs and enhance electric arc blowing force, so that welding spatter and smoke dust are reduced; the slag alkalinity is adjusted by introducing alkaline oxide and CMC-Ca, so that the liquidity of molten iron during vertical downward welding is effectively controlled, and the process adaptability and the production convenience are both considered; and the high-proportion iron powder is added to improve the deposition efficiency, sleeve carbonization is inhibited through the synergistic effect of the magnesia and the iron sand, and the re-arc striking performance of the welding rod is improved. Splashing and smoke dust amount in the welding process can be remarkably reduced, and the comprehensive welding performance is excellent.

The utility model relates to a kind of switch devices, comprising: moving contact system, including first moving contact, contact sheet and second moving contact component, second moving contact component includes component one and second moving contact;Static contact system, including first static contact and the second static contact component being set above first static contact, second static contact component includes support and the second static contact being set on support, arc starter, component two;Arc extinguishing component is set above moving contact system and static contact system, including component three, component four and multiple arc extinguishing grid sheet;Second moving contact is located in the top surface of component one one end, and the other end of the top surface of component one extends to component two and is in contact with its underside;Component one, component two, component three and component four build the second moving contact component, second static contact component and arc extinguishing component inner cavity into airtight area.Compared with prior art, the utility model improves the air tightness of arc extinguishing system, thereby increasing arc blowing gas pressure, improves breaking reliability.

The utility model discloses a normally closed relay, which comprises a contact assembly, at least one side of the contact assembly is provided with an arc extinguish chamber, the contact assembly comprises a movable reed and a static reed which are matched with each other, the movable reed is provided with a movable contact, and the static reed is provided with a static contact; the movable reed comprises a main body part and a head part provided with the movable contact, a bending part is arranged between the main body part and the head part, so that the head part is close to the static reed and is positioned on one side, far away from the main body part, of the static reed, and the movable contact is in normally closed fit with the static contact; and an arc channel leading to the arc extinguish chamber is formed between the head part and the bending part. The arrangement of the bending part can make an arc channel on an arc blow-out path, so that the arc can quickly pass through the arc channel to reach the arc extinguish chamber, and the effect of quick arc extinguish is achieved. Therefore, the normally closed contact and the arc extinguishing function can be realized at the same time without enlarging the volume of the product.

The utility model belongs to the technical field of low-voltage electric appliances, and discloses an arc extinguishing system and a switching device. The arc extinguishing system is used for eliminating electric arcs generated when a moving contact and a static contact in the switching device are disconnected, and comprises an arc extinguishing chamber and an arc striking chamber communicated with the arc extinguishing chamber, a permanent magnet is arranged on one side, close to the moving contact, of the arc striking chamber in the first direction, and arc blowing plates are arranged on the two opposite sides of the permanent magnet in the second direction; the two blow-out plates and the permanent magnet form a first magnetic field, and the first magnetic field is used for quickly transferring the arc into the arc extinguish chamber; the two arc blowing plates, the permanent magnet and the moving contact form a second magnetic field, and the second magnetic field is used for attracting the moving contact, so that the moving contact is far away from the static contact. Wherein the first direction is the moving direction of the moving contact, and the second direction is perpendicular to the first direction. The arc extinguishing system can drive the arc to rapidly move into the arc extinguishing chamber through the external magnetic field for arc extinguishing, can improve the rapid breaking capacity between the moving contact and the static contact, reduces the risk of arc breakdown and reignition, and is good in arc extinguishing effect.

The utility model discloses an arc extinguishing mechanism of a circuit breaker, which comprises a circuit breaker mounting seat, the upper surface of the circuit breaker mounting seat is fixedly connected with three groups of closing mechanisms, and arc blowing mechanisms are arranged in the closing mechanisms; the switching-on mechanism comprises a base, an input pole fixed on the rear side of the upper surface of the base and an output pole fixed on the front side of the upper surface of the base, a switching-on knife switch is hinged to the top end of the output pole, and a contact is connected to the top end of the input pole; the arc blowing mechanism comprises a gas box and a gas conveying assembly fixed to the upper surface of the gas box. According to the technical scheme, mixed gas of sulfur hexafluoride and nitrogen is adopted for arc extinguishing, the sulfur hexafluoride gas has strong electronegativity, so that free electrons in electric arcs are efficiently adsorbed, the nitrogen serves as buffer gas, the decomposition temperature of the sulfur hexafluoride is reduced, the thermal stability is improved, and the balance of arc extinguishing efficiency and environmental protection performance is achieved; the problem of arc reignition easily occurring in traditional air arc extinguishing in an outdoor humid environment is solved.

The invention provides an arc extinguishing structure, a change-over switch and electric equipment, and relates to the technical field of low-voltage electric appliances. The arc extinguishing structure comprises a shell, a mounting seat and a duct; the mounting seat is rotatably arranged on the shell, and the mounting seat is used for mounting the moving contact; the duct is arranged on one side of the mounting seat, the duct is provided with an air outlet, the air outlet is used for facing the moving contact, and the duct is used for synchronously rotating along with the mounting seat, so that airflow flows to the moving contact through the air outlet. According to the utility model, the duct and the mounting seat rotate synchronously, the air flow is blown to the moving contact through the air outlet, and the blown air flow not only can cool the moving contact, but also can generate an arc blowing effect, so that the arc extinguishing performance is improved, the ablation phenomenon of the moving contact and the static contact is avoided, and the service life of the moving contact and the static contact is prolonged.

The invention provides a compact switch contact structure used in insulating liquid. The compact switch contact structure is used for solving the problem that an electric arc cannot be effectively extinguished in the prior art. The compact switch contact structure comprises an upper shell and a lower shell, the upper shell abuts against the lower shell through a supporting shaft, the lower shell is provided with a limiting guide groove, a moving plate slides on the limiting guide groove, static contact sets are arranged on the two sides of the moving plate in a mirroring mode, each static contact set is composed of two static contacts, the moving plate is provided with a moving contact set mounting hole, and the moving contact set mounting hole is connected with the limiting guide groove. A moving contact group is arranged in the moving contact group mounting hole and comprises two conductive plates which abut against each other through a contact spring. According to the invention, due to the particularity of the matching between the structure of the contact and the structure of the moving system, the moving contact drives the insulating medium in the relatively closed space to move together in the moving process, so that the arc blowing and extinguishing effect is achieved, the damage of the arc to the contact is reduced, and the service life of the switch contact is prolonged.

The utility model discloses a relay which comprises a contact part and an arc blowing assembly. The contact part comprises a plurality of contact assemblies, and each contact assembly comprises a static contact and a movable contact piece which are arranged in the first direction. The moving direction of the moving contact is a second direction, and the plurality of contact assemblies are arranged along a third direction. The arc blowing assembly comprises four first permanent magnets, and the four first permanent magnets are located on the two sides of the contact part in the third direction respectively and correspond to the positions of four static contacts on the outermost side of the contact part in the third direction respectively. And along the third direction, the magnetic poles of the mutually facing surfaces of the two corresponding first permanent magnets are opposite, and the magnetic poles of the two first permanent magnets on the same side of the contact part facing the surfaces of the respective corresponding static contacts are opposite.

The present disclosure provides a relay, comprising a contact portion and an arc blowing assembly. The contact portion comprises two contact assemblies; each contact assembly comprises two stationary contacts and a movable contact piece for contacting or separating from the stationary contacts; the arrangement direction of the two stationary contacts of the contact assembly is defined as a first direction, the movement direction of the movable contact piece is defined as a second direction, the first direction is perpendicular to the second direction, and the direction perpendicular to both the first direction and the second direction is defined as a third direction; the plurality of contact assemblies are arranged in the third direction; and the arc blowing assembly comprises four permanent magnets; the four permanent magnets are respectively located on two sides of the contact portion in the first direction, and respectively correspond to the positions of the four stationary contacts; and the magnetic poles of the surfaces of two permanent magnets corresponding to the same contact assembly that face each other are opposite, and in the third direction, the magnetic poles of the surfaces of two adjacent permanent magnets that face respective corresponding stationary contacts are opposite.

The invention relates to the technical field of aluminum sheet metal hot welding, and particularly discloses an aluminum sheet metal hot welding system and welding method.The aluminum sheet metal hot welding system comprises a welding rod, a welding gun located outside a notch is fixedly installed at one end of the welding rod, an arc-shaped piece is fixedly installed at the other end of the welding rod, and the arc-shaped piece is in coupling transmission with a rotating shaft and limiting columns which are arranged on the two sides of a welding seam at equal intervals; and the end part of the single-side limiting column is attached to the side wall of the aluminum plate. The limiting columns distributed at equal intervals can be automatically matched with the arc shape of the outer wall of an aluminum plate, the guide rod is used for providing circumferential driving power for the arc-shaped piece, the welding rod is made to move in a fan shape with a molten pool as the circle center, the included angle between the welding gun and a welding seam is automatically adjusted, and curved surface information is directly transmitted through physical components; the welding seam after tungsten electrode and curved surface change is kept at a constant angle, the problems of arc blowing, abnormal argon coverage and the like are greatly reduced, and the quality of the welding seam is guaranteed.

The utility model provides a lightning arrester connected in series with air-blast arc extinguishing gaps, which comprises a zinc oxide body, a middle gap is arranged on the zinc oxide body, and a closed-loop electrode is arranged on the middle gap; the middle gap is connected with an air-blast arc extinguishing assembly, the air-blast arc extinguishing assembly is connected with a threaded electrode, and the threaded electrode is connected with a high-voltage line; the air-blowing arc extinguishing assembly comprises a connecting column, a threaded electrode is connected to the connecting column, and a middle gap is connected below the connecting column; a plurality of compression pipelines are installed in the connecting column, the compression pipelines are connected end to end and installed in the connecting column in an inclined mode, arc blowing openings are formed in the positions, corresponding to the end-to-end connection positions of the compression pipelines, of the outer wall of the connecting column, and the arc blowing openings communicate with the compression pipelines; and an arc striking table is arranged in the compression pipeline. According to the lightning arrester provided by the utility model, airflow is generated at the arc blowing port through the air-blowing arc extinguishing assembly and acts on an electric arc outside the arc blowing port, and the electric arc outside the arc blowing port is gradually lengthened under the action of the airflow, so that the effect of extinguishing the electric arc is achieved, and stable operation of an electric power system is ensured.

This application provides a method for the synergistic smelting and separation of vanadium-titanium ore using hydrogen plasma and biomass char, relating to the metallurgical field. The method includes: adding vanadium-titanium ore DRI into a closed smelting furnace to form an initial material layer at the furnace bottom; lowering a hollow graphite electrode with an axial central channel to the arc-starting position, introducing a working gas containing hydrogen and igniting the arc to form a slag-iron molten pool containing an upper layer of high-titanium slag and a lower layer of primary pig iron; using the working gas as a carrier gas to inject biomass char powder into the slag-iron molten pool; the metallic vanadium generated by the smelting reaction migrates in situ and accumulates in the molten iron, while the generated CO gas escapes from the molten pool, achieving unidirectional irreversible deep reduction of vanadium; after the smelting reaction reaches its endpoint, the high-titanium slag and vanadium-containing molten iron are separated. The method provided in this application ensures stable plasma arc blowing and the purity of vanadium-containing molten iron, reducing dependence on fossil resources while achieving the separation and utilization of vanadium-titanium ore resources.

The utility model discloses a series gap lightning arrester which comprises an insulating support body, a plurality of electric conductors, an arc extinguish chamber and an arc blow-out hole, the axis of the inner cavity of the insulating support body is a folding line which is bent in a reciprocating manner; and the conductor is arranged at the vertex of the folding line. According to the utility model, the axis of the cavity is designed into the folding line which is bent in a reciprocating manner, so that the purposes of increasing the total length of the gap, uniformly distributing an electric field and increasing the number of the arc extinguish chambers are achieved, the voltage endurance capability, the arc extinguish capability and the reliability of the lightning arrester are improved, and an electric power system or electrical equipment is better protected from being damaged by overvoltage.

The application discloses a relay, comprising a contact part and an arc blowing assembly. The contact part comprises two contact assemblies, each of which comprises two static contacts and a moving contact for contacting or separating the static contacts; the arrangement direction of the two static contacts of the contact assembly is defined as a first direction, the moving direction of the moving contact is defined as a second direction, the first direction is perpendicular to the second direction, and a direction perpendicular to both the first direction and the second direction is defined as a third direction; a plurality of contact assemblies are arranged along the third direction; the arc blowing assembly comprises four permanent magnets, each of which is located at two sides of the contact part along the first direction and corresponds to the position of a static contact; wherein the magnetic poles of the mutually facing surfaces of the two permanent magnets corresponding to the same contact assembly are opposite, and in the third direction, the magnetic poles of the two adjacent permanent magnets facing one side of the corresponding static contact are opposite.

The invention provides a welding rod of a wood flour fiber glass slag system and a preparation method of the welding rod. A coating is prepared from, by weight, 29.5-30.5 parts of reduced ilmenite, 15-16 parts of ilmenite, 5.0-6.0 parts of silicon manganese alloy, 7-8 parts of albite, 3.5-4.5 parts of calcium mica, 4.5-5.5 parts of 24-mesh mica powder, 5.5-6.5 parts of 70% rutile, 3.5-4.5 parts of 87% rutile, 3-4 parts of 60-mesh marble, 1.0-2.0 parts of refined cotton and 4.5-5.5 parts of white mud. 10-12 parts of modified white carbon black, 6.5-7.5 parts of modified nano zinc powder and 11.5-15.5 parts of a modified wood powder fiber material. According to the welding electrode of the wood flour fiber glass slag system, the welding manufacturability of a traditional welding electrode is effectively improved, circumferential welding of natural gas conveying pipeline steel and vertical downward welding of an oil storage tank are met, the electric arc blowing force is effectively improved, and the electric arc stability is guaranteed.