CN218631835U - Ceramic cover structure with built-in arc extinguishing magnetic circuit and high-voltage direct-current relay - Google Patents

Abstract

The utility model discloses a ceramic cover structure and high-voltage direct-current relay that arc extinguishing magnetic circuit is built-in, ceramic cover structure includes ceramic cover and arc extinguishing magnetic circuit, and ceramic cover top wall is worn to be equipped with a plurality of static contacts, and the arc extinguishing magnetic circuit includes at least a set of arc blowing subassembly, and each set of arc blowing subassembly includes one or more permanent magnet respectively; a contact cavity and one or more placing cavities are arranged in the ceramic cover, the placing cavities are positioned beside the contact cavity, and a partition wall is arranged between the placing cavities and the contact cavity; the bottom of the static contact enters the contact cavity, and the permanent magnet is accommodated in the placing cavity. The utility model discloses an arc extinguishing magnetic circuit embeds the mode, has reduced external environment's oxidation, corruption, makes the electroplating cost reduction of arc extinguishing magnetic circuit, and the life of arc extinguishing magnetic circuit is longer.

Description

Ceramic cover structure with built-in arc extinguishing magnetic circuit and high-voltage direct-current relay

Technical Field

The utility model relates to a relay technical field especially relates to a built-in ceramic cover structure of arc extinguishing magnetic circuit and high voltage direct current relay.

Background

A high-voltage direct-current relay in the prior art comprises a ceramic cover, two static contacts, a movable contact and the like, wherein the two static contacts are respectively arranged on the top wall of the ceramic cover in a penetrating mode, the movable contact is located in the ceramic cover, and two ends of the movable contact in the length direction are respectively matched with the bottoms of the two static contacts correspondingly. In order to improve the arc extinguishing effect, permanent magnets (also called magnetic steel) are usually arranged outside the ceramic cover of the high-voltage direct-current relay respectively, and arc is blown by the magnetic field of the permanent magnets. Because the permanent magnet is arranged outside the ceramic cover, the permanent magnet is easily oxidized and corroded by the external environment, the electroplating cost of the permanent magnet is high, and the service life of the permanent magnet is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to prior art exists provides a built-in ceramic cover structure of arc extinguishing magnetic circuit and high-voltage direct current relay, and its arc extinguishing magnetic circuit adopts built-in form.

The utility model provides a technical scheme that its technical problem adopted is: a ceramic cover structure with an internal arc extinguishing magnetic circuit comprises a ceramic cover and an arc extinguishing magnetic circuit, wherein a plurality of static contacts penetrate through the top wall of the ceramic cover, the arc extinguishing magnetic circuit comprises at least one group of arc blowing assemblies, and each group of arc blowing assemblies respectively comprises one or more permanent magnets; a contact cavity and one or more placing cavities are arranged in the ceramic cover, the placing cavities are positioned beside the contact cavity, and a partition wall is arranged between the placing cavities and the contact cavity; the bottom of the static contact enters the contact cavity, and the permanent magnet is accommodated in the placing cavity.

Furthermore, the number of the arc blowing assemblies is one group, the number of the permanent magnets is two, the two permanent magnets are arranged along the length direction of the ceramic cover, and the plurality of fixed contacts are positioned between the two permanent magnets; the number of the placing cavities is two, and the two placing cavities correspond to the two permanent magnets one by one.

Furthermore, the arc blowing assembly further comprises two yoke iron clamps, the two yoke iron clamps are respectively contained in the two containing cavities one by one, and the two permanent magnets are respectively matched with the inner sides of the corresponding yoke iron clamps.

Furthermore, the two yoke iron clamps are respectively in a U shape, the open ends of the two yoke iron clamps are oppositely arranged, and the shape of the placing cavity is matched with that of the yoke iron clamps; the permanent magnet is fitted inside the middle of the yoke clip.

Furthermore, the number of the arc blowing assemblies is multiple, the multiple groups of arc blowing assemblies are arranged along the length direction of the ceramic cover, each group of arc blowing assemblies respectively comprises two permanent magnets, and the two permanent magnets of each group of arc blowing assemblies are respectively arranged along the width direction of the ceramic cover; the fixed contacts correspond to the arc blowing assemblies one by one, and each fixed contact is located between the two permanent magnets of the corresponding arc blowing assembly.

Furthermore, the number of the placing cavities is multiple, and the placing cavities correspond to the permanent magnets one by one.

Furthermore, the number of the arc blowing assemblies is two, the number of the placing cavities is two, the two placing cavities are arranged along the length direction of the ceramic cover and are respectively in a U shape, and the open ends of the two placing cavities are opposite; each group of arc blowing components also respectively comprises a yoke iron clamp, the arc blowing components correspond to the placing cavities one by one, the two permanent magnets and the yoke iron clamp of each group of arc blowing components are respectively accommodated in the same placing cavity, and the two permanent magnets of each group of arc blowing components are respectively matched with the inner sides of the yoke iron clamps; the shape of the yoke iron clamp is matched with that of the placing cavity.

Further, the thickness of the partition wall between the placing cavity and the contact cavity is smaller than the thickness of the four surrounding walls of the ceramic cover.

Further, the arc blowing assembly is fixed in the placing cavity, and the fixing mode of the arc blowing assembly and the placing cavity comprises one or a combination of several of interference fit, adhesive dispensing and fixing and support provided by a preset component; the preset component comprises a frame piece connected with the bottom end of the ceramic cover and/or a supporting part arranged at the bottom end of the arc blowing assembly.

The utility model provides a high voltage direct current relay, including at least one moving contact, still include as above-mentioned the built-in ceramic cover structure of arc extinguishing magnetic circuit, the moving contact is located the contact cavity of ceramic cover, and the bottom of every static contact cooperatees with the moving contact respectively.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. because the ceramic cover adopts the design of dividing the chamber, forms contact chamber and place the chamber, place the chamber and be used for holding the permanent magnet makes the utility model discloses an aspect can separate permanent magnet and contact chamber, avoids electric arc directly to beat on the permanent magnet, influences the magnetism of permanent magnet, on the other hand the utility model discloses an arc extinguishing magnetic circuit embeds the mode, has reduced external environment's oxidation, corruption, makes the electroplating cost reduction of arc extinguishing magnetic circuit, and the life of arc extinguishing magnetic circuit is longer.

2. When two permanent magnets of the arc blowing assembly are arranged along the length direction of the ceramic cover, a platform gap for supporting the ceramic cover in dispensing is supplemented, and the failure risk of glue leakage and product insulation performance reduction in dispensing is reduced.

3. Place the chamber with the thickness of the partition wall between the contact chamber is less than the thickness of wall around four of ceramic cover can shorten the distance of permanent magnet to the contact arc starting point under the brazed condition of ceramic cover not influencing, makes the magnetic field intensity of magnetic blow arcing stronger, and the arc extinguishing effect is better to make contact arc burning time shorter, the contact wearing and tearing are slight, and the life-span number of times is longer.

4. When the arc blowing assembly is fixed in the placing cavity in an interference fit mode and/or dispensing mode, the arc blowing assembly is equivalently suspended and limited on the ceramic cover, and the loss of the magnetic field of the permanent magnet from the frame piece to the frame piece due to the fact that the arc extinguishing magnetic circuit is in contact with the frame piece connected with the bottom end of the ceramic cover can be avoided.

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 of the ceramic cover structure and the high voltage dc relay with the arc extinguishing magnetic circuit inside.

Drawings

Fig. 1 is an exploded schematic view of a ceramic cover structure (including two fixed contacts) according to an embodiment of the present invention;

fig. 2 is a top view (including two fixed contacts) of the ceramic cover structure according to the first embodiment of the present invention;

FIG. 3 isbase:Sub>A sectional view A-A of FIG. 2 according to an embodiment;

fig. 4 is a front view (including two fixed contacts) of the ceramic cover structure according to the first embodiment of the present invention;

FIG. 5 is a cross-sectional view B-B of FIG. 4 according to an embodiment;

fig. 6 is an exploded schematic view of a high-voltage direct-current relay according to the first embodiment of the present invention;

fig. 7 is a top view of the high-voltage direct-current relay according to the first embodiment of the present invention;

FIG. 8 is a cross-sectional view C-C of FIG. 7 according to an embodiment;

fig. 9 is an exploded schematic view of a ceramic cover structure according to the second embodiment of the present invention (including two fixed contacts);

fig. 10 is a top view of a ceramic cover structure (including two fixed contacts) according to the second embodiment of the present invention;

FIG. 11 is a cross-sectional view taken along line D-D of FIG. 10 in accordance with the second embodiment;

fig. 12 is a front view of the ceramic cover structure according to the second embodiment of the present invention (including two fixed contacts);

FIG. 13 is a cross-sectional view E-E of FIG. 12 according to the second embodiment;

fig. 14 is an exploded schematic view of a ceramic cover structure (including two fixed contacts) according to the third embodiment of the present invention;

fig. 15 is a top view of a ceramic cover structure (including two fixed contacts) according to the third embodiment of the present invention;

FIG. 16 is a sectional view taken along line F-F of FIG. 15 according to the third embodiment;

fig. 17 is a front view of a ceramic cover structure (including two fixed contacts) according to the third embodiment of the present invention;

FIG. 18 is a sectional view taken along line G-G of FIG. 17 according to the third embodiment;

FIG. 19 is a sectional view taken along line H-H of FIG. 17 according to the third embodiment;

fig. 20 is an exploded schematic view of a ceramic cover structure (including two stationary contacts) according to the fourth embodiment of the present invention;

fig. 21 is a top view of a ceramic cover structure (including two fixed contacts) according to the fourth embodiment of the present invention;

FIG. 22 is a sectional view taken along line I-I of FIG. 21 according to the fourth embodiment;

fig. 23 is a front view of a ceramic cover structure (including two fixed contacts) according to the fourth embodiment of the present invention;

FIG. 24 is a sectional view taken along line J-J of FIG. 23 according to the fourth embodiment;

FIG. 25 is a sectional view taken along line K-K of FIG. 23 according to an exemplary embodiment.

Detailed Description

In the description of the present application, "plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.

Referring to fig. 1-3, the ceramic cover structure with a built-in arc extinguishing magnetic circuit of the present invention includes a ceramic cover 1 and an arc extinguishing magnetic circuit, the ceramic cover 1 has a top wall and four surrounding walls, a plurality of static contacts 4 are disposed on the top wall of the ceramic cover 1, specifically, the number of the static contacts 4 is two, but not limited thereto, and in other embodiments, the number of the static contacts is four, etc. The two static contacts 4 are arranged along the length direction of the ceramic cover 1. The arc extinguishing magnetic circuit comprises at least one group of arc blowing components, and each group of arc blowing components respectively comprises one or more permanent magnets 2; a contact cavity 11 and one or more placing cavities 12 are arranged in the ceramic cover 1, the placing cavities 12 are positioned beside the contact cavity 11, and a partition wall 13 is arranged between the placing cavities 12 and the contact cavity 11; the bottoms of the two static contacts 4 respectively enter the contact cavity 11, and the permanent magnet 2 is accommodated in the placing cavity 12.

In this embodiment, the number of the arc blowing assemblies is one, the number of the permanent magnets 2 is two, the two permanent magnets 2 are arranged along the length direction of the ceramic cover 1, and the two fixed contacts 4 are located between the two permanent magnets 2. The number of the permanent magnets is not limited to two, and in other embodiments, the number of the permanent magnets is one or more than two. The number of the placing cavities 12 is two, and the two placing cavities 12 correspond to the two permanent magnets 2 one by one. Specifically, the two placing cavities 12 and the contact cavity 11 are arranged along the length direction of the ceramic cover 1, and the contact cavity 11 is located between the two placing cavities 12. The position, shape and size of the placing cavity 12 are matched with those of the permanent magnet 2. In other embodiments, the number of the placing cavities is one, and the placing cavities are closed or opened at the periphery and surround the contact cavity.

In this embodiment, the thickness of the partition wall 13 is smaller than the thickness of the four peripheral walls of the ceramic cover 1, so that the distance from the permanent magnet to the arc starting point of the contact can be shortened without influencing the brazing of the ceramic cover, and the magnetic field intensity of magnetic blow-out is stronger.

In this embodiment, the permanent magnet 2 is fixed in the placing cavity 12, and the fixing manner of the permanent magnet 2 and the placing cavity 12 includes one or a combination of several of interference fit, adhesive dispensing and fixing, and support provided by a preset component. The preset component comprises a frame piece 5 connected with the bottom end of the ceramic cover 1 and/or a supporting part arranged at the bottom end of the permanent magnet 2.

In this embodiment, the two stationary contacts 4 are respectively soldered to two soldering platforms 6 disposed on the top surface of the ceramic cover 1.

The utility model discloses a built-in ceramic cover structure of arc extinguishing magnetic circuit, its ceramic cover 1 adopt and divide the chamber design, form contact chamber 11 with place chamber 12, place chamber 12 and be used for holding permanent magnet 2 makes the utility model discloses an aspect can separate permanent magnet 2 and contact chamber 11, avoids electric arc directly to beat permanent magnet 2 on, influences permanent magnet 2's magnetism, on the other hand the utility model discloses an arc extinguishing magnetic circuit embeds the mode, has shortened permanent magnet 2 to the distance of contact arcing point, makes the magnetic field intensity reinforcing of magnetic blow arcing, and the arc extinguishing effect is better to make contact arcing time shorter, the contact wearing and tearing are slight, the life number of times is longer. In addition, the arc extinguishing magnetic circuit is built-in, so that the oxidation and corrosion of the external environment are reduced, the electroplating cost of the arc extinguishing magnetic circuit is reduced, and the service life of the arc extinguishing magnetic circuit is longer. Particularly, the two permanent magnets 2 are arranged along the length direction of the ceramic cover 1, so that the length dimension of the whole ceramic cover 1 is obviously larger than that of the ceramic cover in the prior art, platform gaps for supporting dispensing at two ends of the ceramic cover 1 in the length direction are supplemented, and the failure risk of glue leakage and product insulation performance reduction during dispensing is reduced.

Please refer to fig. 1-8, the high voltage dc relay of the present invention includes a moving contact 9, a push rod member 10, a coil 7 and a moving iron core 8, and further includes the ceramic cover structure with an arc extinguishing magnetic circuit built-in as described in the present invention, wherein the moving contact 9 is located in the ceramic cover 1, and both ends of the moving contact 9 correspond to two static contacts 4 respectively, the top of the push rod member 10 is movably connected to the moving contact 9, the bottom of the push rod member 10 is fixed to the moving iron core 8, the moving iron core 8 is fitted in the coil 7, and the coil 7 is located below the ceramic cover 1.

The utility model discloses still include yoke iron plate 60, this yoke iron plate 60 sets up frame piece 5 with between the coil 7, yoke iron plate 60 middle part cover is equipped with quiet iron core 20, quiet iron core 20 and move and be provided with reaction spring 30 between the iron core 8, promote pole part 106 and pass quiet iron core 20 and reaction spring 30.

In this embodiment, the utility model discloses still include U font yoke 40, coil 7 is located in U font yoke 40, just be equipped with in the middle of the bottom of U font yoke 40 and stretch into a magnetic conduction section of thick bamboo 50 among the coil 7, movable sleeve is equipped with in this magnetic conduction section of thick bamboo 50 the movable core 8.

In this embodiment, the utility model discloses shell 70 and base 80, the bottom and the base 80 buckle of shell 70 are connected to enclose into a shell chamber, ceramic cover 1, arc extinguishing magnetic circuit, yoke plate 60, U font yoke 40 are located in the shell chamber, the top of two static contacts 4 is located respectively outside the upper end of shell 70. The shell 70 carries out upper limit and outer limit on the U-shaped yoke iron clamp 2, wherein the outer limit is as follows: the U-shaped yoke iron clamp 2 cannot move along the outward direction of the length of the ceramic cover 1 under the limit of the inner side surface of the housing 70.

The utility model discloses a high voltage direct current relay is relevant the structure etc. of ceramic cover structure please refer to its description part before, and this is no longer repeated.

Example two

Referring to fig. 9-13, a ceramic cover structure with a built-in arc extinguishing magnetic circuit and a high voltage dc relay according to the present invention are different from the first embodiment in that: the arc blowing assembly further comprises two yoke iron clamps 3, the two yoke iron clamps 3 are respectively accommodated in the two placing cavities 12 one by one, and the two permanent magnets 2 are respectively matched with the inner sides of the corresponding yoke iron clamps 3. The yoke iron clamp 3 can enhance the magnetic field of the permanent magnet 2 and reduce the leakage of magnetic lines of force.

In this embodiment, the two yoke iron clamps 3 are respectively U-shaped, and the open ends of the two yoke iron clamps 3 are disposed oppositely. The permanent magnet 2 is magnetically attracted to the inner side surface of the yoke clip 3 by virtue of the magnetism of the permanent magnet 2, and particularly, the permanent magnet 2 is matched with the inner side of the middle part of the yoke clip 3, but not limited to. The shape of the placement cavity 12 is adapted to the shape of the yoke iron clamp 3. In other embodiments, the yoke clips are L-shaped, in-line shaped, or the like.

EXAMPLE III

Referring to fig. 14-19, a ceramic cover structure with a built-in arc extinguishing magnetic circuit and a high voltage dc relay according to the present invention are different from the above embodiments in that: the quantity of the arc blowing assemblies is multiple groups, the multiple groups of arc blowing assemblies are arranged along the length direction of the ceramic cover 1, each group of arc blowing assemblies respectively comprise two permanent magnets 2, and the two permanent magnets 2 of each group of arc blowing assemblies are respectively arranged along the width direction of the ceramic cover 1. The fixed contacts 4 correspond to the arc blowing assemblies one by one, and each fixed contact 4 is respectively positioned between the two permanent magnets 2 of the corresponding arc blowing assembly. Specifically, the fixed contact 4 and the two fixed contacts 4 are arranged along the length direction of the ceramic cover 1; the number of the arc blowing components is two.

In this embodiment, the number of the placing cavities 12 is four, the two groups of arc blowing assemblies have four permanent magnets 2, and the four placing cavities 12 correspond to the four permanent magnets 2 one by one. The position, shape and size of the placing cavity 12 are matched with those of the permanent magnet 2. In other embodiments, the number of the placing cavities is two, the two placing cavities correspond to the two groups of arc blowing assemblies one by one, the two permanent magnets of each group of arc blowing assemblies are respectively accommodated in the same placing cavity, the two placing cavities are respectively in a U shape, and the open ends of the two placing cavities are opposite. In other embodiments, the number of the placing cavities is one, the placing cavities are closed or opened at the periphery and surround the contact cavity, and the four permanent magnets are accommodated in the same placing cavity.

Example four

Referring to fig. 20-25, a ceramic cover structure with a built-in arc extinguishing magnetic circuit and a high voltage dc relay according to the present invention are different from the third embodiment in that: the number of the placing cavities 12 is two, the two placing cavities 12 are arranged along the length direction of the ceramic cover, the two placing cavities 12 are respectively in a U shape, and the open ends of the two placing cavities 12 are opposite.

In this embodiment, the two sets of arc blowing assemblies further respectively include a yoke iron clamp 3, and the shape of the yoke iron clamp 3 is adapted to the shape of the placing cavity 12. The arc blowing assembly with place chamber 12 one-to-one, two permanent magnets 2 and the yoke iron of every group arc blowing assembly press from both sides 3 and hold respectively in same chamber 12 of placing, and just two permanent magnets 2 of every group arc blowing assembly cooperate respectively in the inboard of yoke iron clamp 3, specifically, two permanent magnets 2 of every group arc blowing assembly cooperate respectively in the relative both sides inboard of yoke iron clamp 3.

The utility model discloses a built-in ceramic cover structure of arc extinguishing magnetic circuit and high voltage direct current relay does not relate to the part and all is the same with prior art or can adopt prior art to realize.

The above-mentioned embodiment only is used for further explaining the utility model discloses a built-in ceramic cover structure of arc extinguishing magnetic circuit and high-voltage direct current relay, nevertheless the utility model discloses not confine the embodiment to, all be according to the utility model discloses a technical entity is any simple modification, the equivalent change and the decoration of doing above embodiment, all falls into the utility model discloses technical scheme's within the scope of protection.

Claims (10)

1. A ceramic cover structure with an internal arc extinguishing magnetic circuit comprises a ceramic cover and an arc extinguishing magnetic circuit, wherein a plurality of static contacts penetrate through the top wall of the ceramic cover, the arc extinguishing magnetic circuit comprises at least one group of arc blowing assemblies, and each group of arc blowing assemblies respectively comprises one or more permanent magnets; the method is characterized in that: a contact cavity and one or more placing cavities are arranged in the ceramic cover, the placing cavities are positioned beside the contact cavity, and a partition wall is arranged between the placing cavities and the contact cavity; the bottom of the static contact enters the contact cavity, and the permanent magnet is accommodated in the placing cavity.

2. The ceramic cover structure with built-in arc extinguishing magnetic circuit of claim 1, wherein: the number of the arc blowing assemblies is one group, the number of the permanent magnets is two, the two permanent magnets are arranged along the length direction of the ceramic cover, and the plurality of fixed contacts are positioned between the two permanent magnets; the number of the placing cavities is two, and the two placing cavities correspond to the two permanent magnets one by one.

3. The ceramic cover structure with a built-in arc extinguishing magnetic circuit according to claim 2, wherein: the arc blowing assembly further comprises two yoke iron clamps, the two yoke iron clamps are respectively accommodated in the two accommodating cavities one by one, and the two permanent magnets are respectively matched with the inner sides of the corresponding yoke iron clamps.

4. The ceramic cover structure with built-in arc extinguishing magnetic circuit according to claim 3, wherein: the two yoke iron clamps are respectively in a U shape, the open ends of the two yoke iron clamps are oppositely arranged, and the shape of the placing cavity is matched with that of the yoke iron clamps; the permanent magnet is matched with the inner side of the middle part of the yoke iron clamp.

5. The ceramic cover structure with built-in arc extinguishing magnetic circuit of claim 1, wherein: the number of the arc blowing assemblies is multiple, the multiple groups of arc blowing assemblies are arranged along the length direction of the ceramic cover, each group of arc blowing assemblies respectively comprises two permanent magnets, and the two permanent magnets of each group of arc blowing assemblies are respectively arranged along the width direction of the ceramic cover; the fixed contacts correspond to the arc blowing assemblies one by one, and each fixed contact is respectively positioned between the two permanent magnets of the corresponding arc blowing assembly.

6. The ceramic cover structure with built-in arc extinguishing magnetic circuit of claim 5, wherein: the number of the placing cavities is multiple, and the placing cavities correspond to the permanent magnets one by one.

7. The ceramic cover structure with built-in arc extinguishing magnetic circuit of claim 5, wherein: the number of the arc blowing assemblies is two, the number of the placing cavities is two, the two placing cavities are arranged along the length direction of the ceramic cover and are respectively in a U shape, and the open ends of the two placing cavities are opposite; each group of arc blowing components also respectively comprises a yoke iron clamp, the arc blowing components correspond to the placing cavities one by one, the two permanent magnets and the yoke iron clamp of each group of arc blowing components are respectively accommodated in the same placing cavity, and the two permanent magnets of each group of arc blowing components are respectively matched with the inner sides of the yoke iron clamps; the shape of the yoke iron clamp is matched with that of the placing cavity.

8. The ceramic cover structure with built-in arc extinguishing magnetic circuit according to any one of claims 1 to 7, wherein: the thickness of the partition wall is less than the thickness of the four surrounding walls of the ceramic hood.

9. The ceramic cover structure with built-in arc extinguishing magnetic circuit according to any one of claims 1 to 7, wherein: the arc blowing assembly is fixed in the placing cavity, and the fixing mode of the arc blowing assembly and the placing cavity comprises one or a combination of several of interference fit, adhesive dispensing fixation and support provided by a preset component; the preset component comprises a frame piece connected with the bottom end of the ceramic cover and/or a supporting part arranged at the bottom end of the arc blowing assembly.

10. The high-voltage direct-current relay comprises at least one moving contact and is characterized in that: the arc extinguishing magnetic circuit is internally provided with a ceramic cover structure according to any one of claims 1 to 9, the moving contact is positioned in a contact cavity of the ceramic cover, and the bottom of each fixed contact is respectively matched with the moving contact.

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