CN211062662U - High-voltage direct-current relay capable of extinguishing arc - Google Patents

Abstract

The utility model discloses a high voltage direct current relay capable of extinguishing arc, which comprises a base, a magnetic circuit part, a moving contact, a static contact, a pushing clamp, an armature and a grid plate arc extinguishing device; the grid plate arc extinguishing device is movably arranged at the position of a middle line of a gap between the movable contact and the static contact, one part of the armature is matched with an iron core pole surface of the magnetic circuit part, one end of the armature is connected with the pushing clamp, the other end of the armature is linked with the grid plate arc extinguishing device, so that the grid plate arc extinguishing device enters the gap between the movable contact and the static contact to cut electric arcs to realize arc extinguishing when the movable contact and the static contact are separated, and the gap between the movable contact and the static contact is moved out to avoid interference of the contact of the movable contact and the static contact in the contact process of the movable contact. The utility model has the characteristics of the volume is less relatively, simple structure, and the arc extinguishing is effectual, the manufacturing of being convenient for to and can realize that high voltage, heavy current load switch over.

Description

High-voltage direct-current relay capable of extinguishing arc

Technical Field

The utility model relates to a relay technical field especially relates to a but high-voltage direct current relay of arc extinguishing suitable for fields such as photovoltaic power generation, new energy automobile fill electric pile, 5G network.

Background

The electromagnetic relay is an electromechanical element widely applied to various household appliances, office equipment and industrial control. Usually it consists of a contact system, a magnetic circuit system, a housing and a base part. In recent years, in the fields of popular photovoltaic power generation, new energy automobiles, 5G networks and the like, the application of high voltage (direct current voltage is more than 400 VDC) and high current (current is more than 100A) is particularly wide, and the traditional relay cannot meet the requirement.

For the application of a traditional power supply, a photovoltaic inverter, an HVDC power supply and the like, the related current is only dozens of amperes, the voltage is about 400VDC at most, and the requirement can be met by increasing a magnetic steel arc blowing mode near a relay contact. In recent years, new energy automobiles and network communication technologies rise rapidly, and relays with higher loads are needed to effectively break circuits. The method brings trouble to the whole machine manufacturer in the selection of models, and only a vacuum arc extinguishing relay, a circuit breaker and the like which are large in size and high in price can be selected. The vacuum arc-extinguishing relay is complex in process, high in cost, large in size and has explosion risks.

In the direct-current relay capable of realizing arc extinction in the prior art, magnetic steel is added near a contact (namely a moving contact and a static contact), and arc is elongated and extinguished in an accelerated manner by blowing the magnetic steel, but the method is generally applicable to the relay under the condition that the voltage and the current of a load are not too high, and the direct-current relay is not applicable to the load with high voltage (the direct-current voltage is more than 400 VDC) and high current (the current is more than 100A). Another direct-current relay capable of achieving arc extinction in the prior art is that a fixed arc-extinguishing grid is installed near a contact (namely a moving contact and a static contact), for example, the fixed arc-extinguishing grid is similar to a breaker, the arc-extinguishing grid is made of thick iron sheets, an arc needs to be introduced into a grid sheet and internally cut into series short arcs to achieve an arc extinction effect, but from the practical verification effect, the arc cannot completely enter the grid sheet, and the arc extinction effect is not ideal.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a but high-voltage direct current relay of arc extinguishing, have that the volume is less relatively, simple structure, arc extinguishing effect is good, be convenient for make to and can realize the characteristics that high voltage, heavy current load switch over.

The utility model provides a technical scheme that its technical problem adopted is: a high-voltage direct-current relay capable of extinguishing arc comprises a base, a magnetic circuit part, a moving contact, a static contact, a pushing clamp and an armature; the movable contact, the fixed contact and the magnetic circuit part are respectively arranged at the matched positions of the base; the armature iron is matched with the magnetic circuit part, and the pushing card is connected between the moving contact and the armature iron; the relay also comprises a grid plate arc extinguishing device; the grid plate arc extinguishing device is movably arranged at the position of a middle line of a gap between the movable contact and the static contact, one part of the armature is matched with an iron core pole surface of the magnetic circuit part, one end of the armature is connected with the pushing card so as to drive the pushing card to move back and forth along a first direction when the armature acts, the movable contact and the static contact are contacted or separated in the first direction, the other end of the armature is linked with the grid plate arc extinguishing device, the grid plate arc extinguishing device is made to move back and forth along a second direction perpendicular to the first direction, so that electric arc is cut in the gap between the movable contact and the static contact to realize arc extinguishing when the movable contact and the static contact are separated, and the gap between the movable contact and the static contact is moved out to avoid interference with the contact of the movable contact and the static contact.

The armature is V-shaped, one side of the V-shaped armature is used as one part of the armature to be matched with an iron core pole surface of the magnetic circuit part, the end part of one side of the V-shaped armature is connected with the pushing clamp, and the other side of the V-shaped armature is linked with the grid plate arc extinguishing device.

The other side of the V-shaped of the armature is set to be a swing arm, the grid arc extinguishing device is in sliding fit on the base in a guiding and moving mode, the grid arc extinguishing device is provided with a first matching groove, and the end portion of the swing arm is in movable fit in the first matching groove so that the swing motion of the swing arm of the armature is converted into the guiding motion of the grid arc extinguishing device along the base.

The included angle of the V-shape of the armature is an acute angle, and the armature is arranged in the base through a restoring reed and matched with the magnetic circuit part.

In the base, be equipped with the first spout along the second direction in the shift position department corresponding to grid piece arc control device, grid piece arc control device is equipped with first sand grip, grid piece arc control device's first sand grip sliding fit is in order to realize that grid piece arc control device is in the first spout of base the direction removes in the base.

The head of the metal swing rod is coated with a plastic body in an injection molding mode, the end part of the plastic body is provided with a cylindrical structure, and the tail part of the metal swing rod is fixedly riveted with the end part of the swing arm of the armature; the cylindrical structure of the plastic body is matched in the first matching groove of the grid arc extinguishing device.

The grid arc-extinguishing device comprises a fixed seat and a plurality of stainless steel sheets which are fixed in the fixed seat and arranged in a laminating mode, mica sheets are further arranged between every two adjacent stainless steel sheets, the area of each mica sheet is smaller than that of each stainless steel sheet, and an air gap is formed between every two adjacent stainless steel sheets in the direction towards the moving contact and the static contact.

The thicknesses of the stainless steel sheets are equal, and the thickness of the mica sheet arranged between the two adjacent stainless steel sheets is equal to that of the stainless steel sheet.

The moving contact comprises a contact sliding block and a moving contact, the contact sliding block is arranged on the base in a sliding mode along the first direction, the moving contact is arranged at the front end of the contact sliding block, a second matching groove is formed in the rear portion of the contact sliding block, a hook head is arranged at one end of the pushing clamp, and the hook head at one end of the pushing clamp is in clearance fit in the second matching groove in the first direction so as to form a section of idle stroke by utilizing the clearance.

The moving contact is characterized in that the number of the fixed contacts is two, the two fixed contacts are arranged in the base side by side, the moving contact further comprises a bridge type movable spring, the bridge type movable spring is arranged at the front part of the contact sliding block, and two ends of the bridge type movable spring are respectively and fixedly connected with a movable contact and respectively correspond to the fixed contacts of the two fixed contacts; the two grid arc extinguishing devices are respectively arranged at the position of the middle line of the gap between the two pairs of moving contacts and the static contacts; the other side of the V-shape of the armature is provided with two swing arms.

The magnetic circuit part comprises an iron core, a magnetic circuit part and a frame-shaped part, wherein the iron core comprises an iron core pole face and a magnetic circuit part, the iron core pole face is composed of an end face of the iron core matched in an iron core hole of the magnetic circuit part and an end face of the frame-shaped part sleeved at one end of the iron core, the end face of one end of the iron core is not flush with the end face of the frame-shaped part, and the end face of one end of the iron core is closer to one.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses owing to adopted and to have established the intermediate line position department with the movably dress of grid piece arc control device in the clearance between moving contact and static contact, establish the shape of armature into the V-arrangement, one side of the V-arrangement of armature cooperatees with the iron core pole face of magnetic circuit part, and the end connection on one side of this V-arrangement pushes away the card to when armature moves, drive and push away the card and go back to and move along the first direction, make the contact of moving, static contact on the first direction or separate, the another side linkage of the V-arrangement of armature grid piece arc control device makes grid piece arc control device reciprocate along the second direction with first direction vertically, in order when moving, static contact separation, enters into the clearance between moving, the static contact and realizes the arc extinguishing, and in moving, static contact process, shifts out the clearance between moving, the static contact and avoids interfering moving, static contact. The utility model discloses a this kind of structure, it is movably entering into with grid piece arc control device design, cutting electric arc in the clearance of static contact, cut into the several short arc with long arc in order to reach better arc extinguishing effect, and grid piece arc control device realizes mechanical linkage through armature and contact motion, ensure that the grid piece can get into cutting electric arc between the disconnection contact completely, finally reach arc extinguishing effect, it is relatively less to have the volume, moreover, the steam generator is simple in structure, the arc extinguishing effect is good, be convenient for make, and can realize high voltage, the characteristics that heavy current load switches.

2. The utility model discloses owing to adopted and cooperateed two static contacts and bridge type movable contact spring and constitute series connection air gap return circuit to and dispose the intermediate line position department in the clearance between two pairs of moving, stationary contact respectively with two grid piece arc extinguishing devices, make the contact switching ability reach 600VDC for the biggest switching voltage, the electric current can reach 150A.

3. The utility model discloses owing to adopted by the fixing base with fix in the fixing base and be the multi-disc stainless steel thin slice that range upon range of mode set up and constitute grid arc control device, and still be equipped with the mica sheet between two adjacent stainless steel thin slices, the area of mica sheet is less than the area of stainless steel thin slice, and make between two adjacent stainless steel thin slices moving towards, the direction of static contact forms one section air gap, and the thickness of multi-disc stainless steel thin slice equals, the thickness of establishing the mica sheet between two adjacent stainless steel thin slices also equals with the thickness of stainless steel thin slice. The utility model discloses a high temperature resistant, the anti-oxidant of stainless steel sheet and the high temperature resistant insulating properties of mica sheet can be utilized to this kind of structure, and the combination forms a plurality of air gaps that the size is the same, can attenuate the whole thickness of bars piece, reduces the inner space, reaches good arc extinguishing effect.

4. The utility model adopts the injection molding mode to coat the head of the metal swing rod with the plastic body, the end part of the plastic body is provided with a cylindrical structure, and the tail part of the metal swing rod is riveted and fixed with the end part of the swing arm of the armature; the cylindrical structure of the plastic body is matched in the first matching groove of the grid arc extinguishing device. The utility model discloses a this kind of structure, metal pendulum rod are wrapped up by the effective plastics part length of the plastic body, play effective isolation and increase creepage distance's effect.

5. The utility model discloses owing to adopted and be equipped with second cooperation groove at the rear portion of contact slider, the one end of propelling movement card is equipped with the gib head, the gib head of the one end of propelling movement card is in first direction is clearance fit in the second cooperation groove, in order to utilize one section idle stroke of clearance formation. The utility model discloses a this kind of structure utilizes the idle stroke, makes the process of contact and disconnection can not collide with grid piece arc control device.

6. The utility model discloses owing to adopted the contained angle design with the V-arrangement of armature to be the acute angle, can extend the lower partial length on one side of the V-arrangement of armature for the arm of force that recovers the reed with it complex obtains extending, thereby has reduced the counter-force of relay, further promotes product suction.

7. The utility model discloses owing to adopted the iron core polar surface to be by the cooperation one end terminal surface and the cover of the iron core in the iron core hole of magnetic circuit part the terminal surface of the frame-shaped piece of an end department of iron core constitutes, just the one end terminal surface of iron core with the terminal surface of frame-shaped piece is not the parallel and level, the one end terminal surface of iron core for the terminal surface of frame-shaped piece is close to more one side of the V-arrangement of armature. The utility model discloses a this kind of structure further increases product suction (two terminal surfaces stack when initial suction, increase magnetic field), increases the suction of relay overtravel section simultaneously (when the contact is closed, because the drop of big or small terminal surface mainly uses little terminal surface as leading, increase relay holding power).

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment.

Drawings

Fig. 1 is an exploded perspective view of an embodiment of the present invention;

fig. 2 is a schematic perspective view of an embodiment of the present invention (not including a housing);

fig. 3 is a schematic perspective view of an embodiment of the present invention (not including the housing and rotated at an angle);

fig. 4 is a schematic perspective view of two grid arc extinguishing devices according to an embodiment of the present invention;

fig. 5 is a schematic diagram of the stainless steel sheet and the mica sheet of the grid arc extinguishing device according to the embodiment of the present invention;

fig. 6 is a schematic diagram of the two grid arc extinguishing devices and two pairs of moving and static contacts according to the embodiment of the present invention;

fig. 7 is a schematic diagram of the matching of the armature and two metal swing rods according to the embodiment of the present invention;

fig. 8 is a schematic diagram of the armature cooperating with two grid arc extinguishing devices through two metal swing rods according to the embodiment of the present invention;

fig. 9 is a schematic diagram of the cooperation of the push card with the movable contact and the armature according to the embodiment of the present invention;

fig. 10 is a schematic view of the armature, return spring and magnetic circuit portion of an embodiment of the invention in combination;

fig. 11 is a schematic perspective view of a magnetic circuit portion according to an embodiment of the present invention;

fig. 12 is a front view of a magnetic circuit portion of an embodiment of the present invention.

Detailed Description

Examples

Referring to fig. 1 to 12, the high voltage direct current relay capable of extinguishing arc of the present invention includes a housing 1, a base 2, a magnetic circuit portion 3, a moving contact 4, a static contact 5, a push card 6 and an armature 7; the moving contact 4, the static contact 5 and the magnetic circuit part 3 are respectively arranged at the matched positions of the base 2; the shell 1 is arranged on the base 2; the armature 7 is matched with the magnetic circuit part 3, and the pushing card 6 is connected between the moving contact 4 and the armature 7; the relay further comprises a grid arc extinguishing device 8, the grid arc extinguishing device 8 is movably arranged at the position of a middle line of a gap between the movable contact 4 and the static contact 5, the armature 7 is in a V shape, one V-shaped side 71 of the armature 7 is matched with an iron core pole surface of the magnetic circuit part 3, the end part of one V-shaped side 71 is connected with the pushing card 6 so as to drive the pushing card 6 to move back and forth along a first direction when the armature 7 acts, the movable contact 4 and the static contact 5 are contacted or separated in the first direction, the other V-shaped side 72 of the armature 7 is linked with the grid arc extinguishing device 8, the grid arc extinguishing device 8 moves back and forth along a second direction perpendicular to the first direction so as to enter the gap between the movable contact and the static contact to cut and extinguish an arc when the movable contact 4 and the static contact 5 are separated, and in the contact process of the movable contact 4 and the static contact 5, and the gap between the moving contact and the static contact is removed to avoid the interference of the contact of the moving contact and the static contact.

In this embodiment, the other side 72 of the V-shape of the armature 7 is provided as a swing arm, the grid arc extinguishing device 8 is slidably fitted on the base 2 in a guiding manner, and the grid arc extinguishing device 8 is provided with a first fitting groove 81; the relay further comprises a metal swing rod 91, the head of the metal swing rod 91 is coated with a plastic body 92 in an injection molding mode, the end of the plastic body 92 is provided with a cylindrical structure 921, and the tail of the metal swing rod 91 is fixedly riveted with the end of the swing arm 72 of the armature 7; the cylindrical structure 921 of the plastic body 92 fits in the first fitting groove 81 of the grid arc extinguishing device 8 to convert the oscillating movement of the oscillating arm 72 of the armature 7 into a guiding movement of the grid arc extinguishing device 8 along the base 2.

In this embodiment, the angle of the V-shape of the armature 7 is an acute angle, and the armature 7 is installed in the base 2 by a restoring spring 93 and is matched with the magnetic circuit portion 3.

In this embodiment, the base 2 is provided with a first sliding groove 21 along the second direction at a position corresponding to the moving position of the grid arc extinguishing device 8, the grid arc extinguishing device 8 is provided with a first protruding strip 82, and the first protruding strip 82 of the grid arc extinguishing device 8 is slidably fitted in the first sliding groove 21 of the base 2 to realize the guiding movement of the grid arc extinguishing device 8 in the base 2.

In this embodiment, the grid arc extinguishing device 8 includes a fixing base 83 and a plurality of stainless steel sheets 84 fixed in the fixing base and arranged in a stacked manner, a mica sheet 85 is further arranged between two adjacent stainless steel sheets 84, the area of the mica sheet 85 is smaller than that of the stainless steel sheets 84, and an air gap 86 is formed between two adjacent stainless steel sheets 84 in a direction toward the moving contact and the stationary contact. The first engaging groove 81 and the first protruding strip 82 are disposed on the fixing base 83.

In this embodiment, the plurality of stainless steel sheets 84 have the same thickness, and the mica sheets 85 disposed between two adjacent stainless steel sheets 84 have the same thickness as the stainless steel sheets 84.

In this embodiment, the movable contact 4 includes a contact slider 41 and a movable contact 42, the contact slider 41 is slidably mounted on the base 2 along the first direction, the movable contact 42 is mounted at the front end of the contact slider 41, a second mating groove 43 is disposed at the rear portion of the contact slider 41, a hook 61 is disposed at one end of the push card 6, and the hook 61 at one end of the push card 6 is fitted in the second mating groove 43 with a gap 44 in the first direction, so as to form a section of idle stroke by using the gap 44.

In this embodiment, the number of the fixed contacts 5 is two, the two fixed contacts 5 are installed in the base 2 side by side, the movable contact 4 further includes a bridge-type movable spring 45, the bridge-type movable spring 45 is installed at the front portion of the contact slider 41, two ends of the bridge-type movable spring 45 are respectively and fixedly connected with a movable contact 42, and the two movable contacts 42 respectively correspond to the fixed contacts 51 of the two fixed contacts 5; the two grid arc extinguishing devices 8 are respectively arranged at the position of the middle line of the gap between the two pairs of moving contacts and the static contacts; the other side of the V-shape of the armature 7 is provided with two swing arms 72; the two swing arms 72 are respectively fitted in the first fitting grooves 81 of the two grid arc extinguishing devices 8 through the two metal swing links 91.

In the present embodiment, the core pole face is composed of the end face 311 of the core 31 fitted in the core hole of the magnetic circuit portion and the end face 321 of the frame member 32 fitted at one end of the core 31, and the end face 311 of the core 31 is not flush with the end face 321 of the frame member 32, and the end face 311 of the core 31 is closer to the V-shaped side 71 of the armature 7 than the end face 321 of the frame member 32.

The utility model discloses a but high-voltage direct current relay of arc extinction, grid piece arc control device 8 is formed by several stainless steel thin sheets 84 and the high insulating mica sheet 85 stack of high temperature resistant, and the air gap that the several equals is constituteed to stainless steel sheet 84 and mica sheet 85, and this embodiment adopts 13 mica sheets 85 and 14 stainless steel sheets 84 stacks to form a grid piece arc control device 8, and movable contact spring 45 adopts the bridge type design, from this way, can form 30 air gaps that equal altogether. When the contact is disconnected, an electric arc with extremely strong energy is generated instantly, at the moment, arc extinguishing grid plates in the grid plate arc extinguishing device 8 quickly enter between contacts, the electric arc enters a plurality of equal air gaps formed by the stainless steel plates 84 and the mica plates 85 and is cut into a plurality of short arcs, at the moment, the electric arc energy is weakened instantly, the mica plates 85 with high temperature resistance and high insulation are arranged between the air gaps to serve as reinforced partitions, in addition, the stainless steel plates 84 have the characteristics of higher high temperature resistance and higher oxidation resistance than iron plates, and therefore, the electric arc between the air gaps cannot be broken down due to the fact that the number of the air gaps formed by the left grid plate and the right grid plate is enough, the voltage acting between the contacts is smaller than the total dielectric strength between the arc extinguishing grid plates, and the electric arc is not re-ignited any more; the contact switching capacity is the maximum switching voltage of 600VDC, and the current can reach 150A.

In order to achieve the effect of cutting electric arcs by movement, the grid arc extinguishing device 8 is designed to be in linkage with the V-shaped armature 7, the movement directions of the grid arc extinguishing device 8 and one side 71 of the V-shape of the armature 7 are mutually perpendicular, under the action of an electromagnetic field, the head of the armature 7 (the end part of one side 71 of the V-shape of the armature 7) drives the pushing card 6 to move along the horizontal direction (namely the first direction), and the tail of the armature 7 (the end part of the other side 72 of the V-shape of the armature 7) drives the grid arc extinguishing device 8 to move along the vertical direction (namely the second direction). In the initial state, the moving contact 4 and the static contact 5 are in an open state, and the grid part of the grid arc extinguishing device 8 is still positioned between the open contacts. After the coil of the magnetic circuit part 3 is excited, the armature 7 overcomes the counterforce of the reset reed 93, the head of the armature 7 drives the pushing card 6 to move towards the direction of the contact, meanwhile, the grid arc extinguishing device 8 also moves downwards to enable the grid of the grid arc extinguishing device 8 to gradually leave the contact, in order to ensure that the moving contact and the static contact do not interfere with the grid of the grid arc extinguishing device 8 in the contact process, a section of idle stroke 44 is designed between the pushing card 6 and the contact sliding block 41, and after the idle stroke 44 is finished, the grid of the grid arc extinguishing device 8 is completely separated from the moving contact and the static contact, and at the moment, the moving contact and the static contact can be reliably connected with a circuit. When the coil of the magnetic circuit part 3 is powered off, the armature 7 drives the pushing card 6 to move towards the direction far away from the contact under the action of the counterforce of the restoring reed 93, meanwhile, the grid sheet of the grid sheet arc extinguishing device 8 also moves towards the direction close to the contact, when the pushing card 6 finishes the idle stroke with the contact slide block 41, the head of the pushing card 6 pulls the contact slide block 41 to move together, at the moment, the moving contact and the static contact can be opened, and the grid sheet of the grid sheet arc extinguishing device 8 also rapidly enters between the contacts to finish arc cutting.

The utility model discloses a but high-voltage direct-current relay of arc extinction has adopted and has adorned the middle line position department in the clearance between moving contact 4 and static contact 5 with the movably dress of grid piece arc control device 8, establishes the shape of armature 7 into the V-arrangement, and one side 71 of the V-arrangement of armature 7 cooperatees with the iron core pole face of magnetic circuit part, and the end connection of one side 71 of this V-arrangement pushes away card 6 to when armature 7 moves, drive and push away card 6 and go back to and move along the first direction, make moving contact 4, 5 contact or separation in the first direction, another side 72 linkage of the V-arrangement of armature 7 grid piece arc control device 8 makes grid piece arc control device 8 reciprocate along the second direction perpendicular with the first direction, so that when moving contact 4, 5 separate, enter into the clearance between moving contact 4, static contact 5 and realize electric arc in the cutting of moving contact 4, static contact, and arc control device, and move, And 5, in the contact process, the gap between the movable contact and the fixed contact 4 and 5 is removed to avoid the interference of the contact of the movable contact and the fixed contact. The utility model discloses a this kind of structure, it moves to design into movably entering with grid piece arc control device 8, static contact 4, 5 cut electric arc in the clearance, cut into the several short arc with long arc in order to reach better arc extinguishing effect, and grid piece arc control device 8 realizes mechanical linkage through armature and contact motion, ensure that the grid piece can get into cutting electric arc between the disconnection contact completely, finally reach arc extinguishing effect, it is relatively less to have a volume, moreover, the steam generator is simple in structure, the arc extinguishing effect is good, be convenient for make, and can realize high voltage, the characteristics that heavy current load switches.

The utility model discloses a but high-voltage direct current relay of arc extinguishing has adopted and has cooperateed two static contacts 5 and bridge type movable contact spring 45 and has constituteed series connection air gap return circuit to and dispose two bars piece arc extinguishing device 8 respectively in the intermediate line position department in the clearance between two pairs of moving, stationary contact, make contact switching ability reach 600VDC for the biggest switching voltage, the electric current can reach 150A.

The utility model discloses a but high-voltage direct current relay of arc extinction, adopted by fixing base 83 with fix in the fixing base and be the multi-disc stainless steel thin slice 84 that the range upon range of mode set up and constitute grid arc control device, and still be equipped with mica sheet 85 between two adjacent stainless steel thin slices 84, mica sheet 85's area is less than stainless steel thin slice 84's area, and make between two adjacent stainless steel thin slices 84 moving towards, the direction of static contact forms one section air gap 86, and multi-disc stainless steel thin slice 84's thickness equals, establish the thickness of mica sheet 85 between two adjacent stainless steel thin slices 84 and stainless steel thin slice's thickness also equal. The utility model discloses a this kind of structure can utilize stainless steel sheet 84's high temperature resistant, anti-oxidant and mica sheet 85's high temperature insulation performance, and the combination forms a plurality of air gaps that the size is the same, can attenuate the whole thickness of bars piece, reduces the inner space, reaches good arc extinguishing effect.

The utility model discloses a high voltage direct current relay that can extinguish arc, the head that has adopted metal pendulum rod 91 adopts the injection moulding mode to coat plastic body 92, the tip of plastic body 92 is equipped with cylindrical structure 921, the afterbody of metal pendulum rod 92 with the tip riveting of swing arm 72 of armature 7 is fixed mutually; the cylindrical structure 921 of the plastic body 92 is fitted in the first fitting groove 81 of the grid arc extinguishing device 8. The utility model discloses a this kind of structure, metal pendulum rod 91 is wrapped up by the effective plastics part length of plastic body 92, plays the effect of effective isolation and increase creepage distance.

The utility model discloses a but high-voltage direct current relay of arc extinction has adopted and has been equipped with second cooperation groove 43 at the rear portion of contact slider 41, and the one end that promotes card 6 is equipped with gib head 61, the gib head 61 that promotes the one end of card 6 is clearance 44 cooperate in second cooperation groove 43, in order to utilize clearance 44 forms one section idle stroke. The utility model discloses a this kind of structure utilizes the idle stroke, makes the process of contact and disconnection can not collide with grid piece arc control device.

The utility model discloses a but high-voltage direct current relay of arc extinction has adopted the contained angle design with armature 7's V-arrangement to be the acute angle, can extend armature's V-arrangement's lower partial length on one side for the arm of force that recovers the reed with it complex obtains extending, thereby has reduced the counter-force of relay, further promotes product suction.

The utility model discloses a but high-voltage direct current relay of arc extinction has adopted the iron core polar surface by the cooperation iron core 31 in the iron core hole of magnetic circuit part one end terminal surface 311 and cover the terminal surface 321 of the frame shape 32 of an end department of iron core constitutes, just the one end terminal surface 311 of iron core 31 with the terminal surface 321 of frame shape 32 is not the parallel and level, the one end terminal surface 311 of iron core 31 for the terminal surface 321 of frame shape 32 is closer to one side of the V-arrangement of armature 7 more. The utility model discloses a this kind of structure further increases product suction (two terminal surfaces stack when initial suction, increase magnetic field), increases the suction of relay overtravel section simultaneously (when the contact is closed, because the drop of big or small terminal surface mainly uses little terminal surface as leading, increase relay holding power).

The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solutions disclosed above can be used by those skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims (11)

1. A high-voltage direct-current relay capable of extinguishing arc comprises a base, a magnetic circuit part, a moving contact, a static contact, a pushing clamp and an armature; the movable contact, the fixed contact and the magnetic circuit part are respectively arranged at the matched positions of the base; the armature iron is matched with the magnetic circuit part, and the pushing card is connected between the moving contact and the armature iron; the relay also comprises a grid plate arc extinguishing device; the method is characterized in that: the grid plate arc extinguishing device is movably arranged at the position of a middle line of a gap between the movable contact and the static contact, one part of the armature is matched with an iron core pole surface of the magnetic circuit part, one end of the armature is connected with the pushing card so as to drive the pushing card to move back and forth along a first direction when the armature acts, the movable contact and the static contact are contacted or separated in the first direction, the other end of the armature is linked with the grid plate arc extinguishing device, the grid plate arc extinguishing device is made to move back and forth along a second direction perpendicular to the first direction, so that electric arc is cut in the gap between the movable contact and the static contact to realize arc extinguishing when the movable contact and the static contact are separated, and the gap between the movable contact and the static contact is moved out to avoid interference with the contact of the movable contact and the static contact.

2. An arc-quenching high voltage direct current relay according to claim 1, characterized in that: the armature is V-shaped, one side of the V-shaped armature is used as one part of the armature to be matched with an iron core pole surface of the magnetic circuit part, the end part of one side of the V-shaped armature is connected with the pushing clamp, and the other side of the V-shaped armature is linked with the grid plate arc extinguishing device.

3. An arc-quenching high voltage direct current relay according to claim 2, characterized in that: the other side of the V-shaped of the armature is set to be a swing arm, the grid arc extinguishing device is in sliding fit on the base in a guiding and moving mode, the grid arc extinguishing device is provided with a first matching groove, and the end portion of the swing arm is in movable fit in the first matching groove so that the swing motion of the swing arm of the armature is converted into the guiding motion of the grid arc extinguishing device along the base.

4. An arc-quenching high-voltage direct current relay according to claim 2 or 3, characterized in that: the included angle of the V-shape of the armature is an acute angle, and the armature is arranged in the base through a restoring reed and matched with the magnetic circuit part.

5. An arc-quenching high voltage direct current relay according to claim 3, characterized in that: in the base, be equipped with the first spout along the second direction in the shift position department corresponding to grid piece arc control device, grid piece arc control device is equipped with first sand grip, grid piece arc control device's first sand grip sliding fit is in order to realize that grid piece arc control device is in the first spout of base the direction removes in the base.

6. An arc-quenching high voltage direct current relay according to claim 3, characterized in that: the head of the metal swing rod is coated with a plastic body in an injection molding mode, the end part of the plastic body is provided with a cylindrical structure, and the tail part of the metal swing rod is fixedly riveted with the end part of the swing arm of the armature; the cylindrical structure of the plastic body is matched in the first matching groove of the grid arc extinguishing device.

7. An arc-quenching high voltage direct current relay according to claim 2, characterized in that: the grid arc-extinguishing device comprises a fixed seat and a plurality of stainless steel sheets which are fixed in the fixed seat and arranged in a laminating mode, mica sheets are further arranged between every two adjacent stainless steel sheets, the area of each mica sheet is smaller than that of each stainless steel sheet, and an air gap is formed between every two adjacent stainless steel sheets in the direction towards the moving contact and the static contact.

8. An arc-quenching high voltage direct current relay according to claim 7, characterized in that: the thicknesses of the stainless steel sheets are equal, and the thickness of the mica sheet arranged between the two adjacent stainless steel sheets is equal to that of the stainless steel sheet.

9. An arc-quenching high voltage direct current relay according to claim 2, characterized in that: the moving contact comprises a contact sliding block and a moving contact, the contact sliding block is arranged on the base in a sliding mode along the first direction, the moving contact is arranged at the front end of the contact sliding block, a second matching groove is formed in the rear portion of the contact sliding block, a hook head is arranged at one end of the pushing clamp, and the hook head at one end of the pushing clamp is in clearance fit in the second matching groove in the first direction so as to form a section of idle stroke by utilizing the clearance.

10. An arc-quenching high voltage direct current relay according to claim 9, characterized in that: the moving contact is characterized in that the number of the fixed contacts is two, the two fixed contacts are arranged in the base side by side, the moving contact further comprises a bridge type movable spring, the bridge type movable spring is arranged at the front part of the contact sliding block, and two ends of the bridge type movable spring are respectively and fixedly connected with a movable contact and respectively correspond to the fixed contacts of the two fixed contacts; the two grid arc extinguishing devices are respectively arranged at the position of the middle line of the gap between the two pairs of moving contacts and the static contacts; the other side of the V-shape of the armature is provided with two swing arms.

11. An arc-quenching high voltage direct current relay according to claim 2, characterized in that: the magnetic circuit part comprises an iron core, a magnetic circuit part and a frame-shaped part, wherein the iron core comprises an iron core pole face and a magnetic circuit part, the iron core pole face is composed of an end face of the iron core matched in an iron core hole of the magnetic circuit part and an end face of the frame-shaped part sleeved at one end of the iron core, the end face of one end of the iron core is not flush with the end face of the frame-shaped part, and the end face of one end of the iron core is closer to one.

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