CN215118775U - High-voltage direct-current relay - Google Patents
High-voltage direct-current relay Download PDFInfo
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- CN215118775U CN215118775U CN202121067485.8U CN202121067485U CN215118775U CN 215118775 U CN215118775 U CN 215118775U CN 202121067485 U CN202121067485 U CN 202121067485U CN 215118775 U CN215118775 U CN 215118775U
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- ceramic cover
- static contact
- ring
- hole
- voltage direct
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Abstract
The utility model discloses a high voltage direct current relay, which comprises a ceramic cover, a static contact and a movable reed; the static contact is arranged on the top wall of the ceramic cover; the ceramic cover is provided with a through hole, and the static contact is in clearance fit with the through hole of the ceramic cover; in the lower part of the static contact, a protective ring which surrounds the peripheral surface of the static contact and is not contacted with the ceramic cover is also arranged at the through hole close to the ceramic cover; the outline of the periphery of the protective ring is larger than the through hole of the top wall of the ceramic cover. The utility model discloses utilize sheltering from of guard ring to the through-hole of the roof of ceramic cover, can prevent that electric arc splash from getting into in the clearance between the pore wall of the through-hole of static contact and ceramic cover to can increase creepage distance and the insulation resistance through this route of ceramic cover between the electric conductor below the ceramic cover and the static contact.
Description
Technical Field
The utility model relates to a relay technical field especially relates to a high voltage direct current relay.
Background
A relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), which is commonly used in automatic control circuits, and which is actually an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. The high-voltage direct-current relay is one of relays, most of the existing high-voltage direct-current relays adopt a movable contact spring direct-acting structure, namely, two static contacts are matched with one movable contact spring, and according to the practical application of vehicle-mounted, energy storage, charging pile, ship electricity, avionic and the like, the contacts need to be switched on with load, switched off with load and switched over with load, so that the switching function is realized, and the arc ablation of internal contacts can occur in the processes. After the arc of the direct current relay is ablated, the arc is ablated and splashed to pollute the inner wall of a contact part, so that the original insulating ceramic and plastic shell is polluted, an insulating short circuit is formed, and the insulation is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a high-voltage direct-current relay, which can reduce the phenomena of insulation short circuit and insulation reduction caused by electric arc splashing through structural improvement; meanwhile, creepage distance is increased, and insulation resistance is increased, so that arc extinguishing requirements of high voltage and large current can be met, and meanwhile, the manufacturing cost of the product cannot be greatly increased.
The utility model provides a technical scheme that its technical problem adopted is: a high-voltage direct-current relay comprises a ceramic cover, two static contacts and a movable reed, wherein the two static contacts are used for providing current inflow and current outflow respectively; the two static contacts are respectively arranged on the top wall of the ceramic cover, the lower parts of the two static contacts respectively extend into the cavities of the ceramic cover, and two ends of the movable spring leaf are respectively matched with the bottom ends of the two static contacts; the top wall of the ceramic cover is provided with a through hole, and the outer peripheral surface of the middle part of the static contact is in clearance fit with the hole wall of the through hole of the ceramic cover; in the lower part of the static contact, a protective ring which surrounds the peripheral surface of the static contact and is not contacted with the ceramic cover is also arranged at the through hole close to the ceramic cover; the outline of the periphery of the protective ring is larger than the through hole of the top wall of the ceramic cover, so that electric arc splashes are prevented from entering a gap between the static contact and the hole wall of the through hole of the ceramic cover by utilizing the shielding of the protective ring on the through hole of the top wall of the ceramic cover, and the creepage distance and the insulation resistance of a path passing through the ceramic cover between the electric conductor below the ceramic cover and the static contact can be increased.
The upper surface of the protective ring is also provided with at least one annular first convex part which is not contacted with the ceramic cover in an extending way towards the top wall direction of the ceramic cover, so that electric arc splashing is prevented from entering a gap between the static contact and the hole wall of the through hole of the ceramic cover by utilizing the shielding of the first convex part, and the creepage distance and the insulation resistance between the electric conductor below the ceramic cover and the static contact through the path of the ceramic cover can be increased.
A first convex part is arranged on the guard ring, and the first convex part is arranged at the edge of the guard ring.
More than two first convex parts are arranged on the guard ring, the more than two first convex parts are arranged inwards from the edge of the guard ring in sequence, and the diameter of the ring of the innermost first convex part is larger than the aperture of the through hole of the top wall of the ceramic cover.
A second convex part is convexly extended towards the central line direction of the through hole in the hole wall of the through hole of the ceramic cover; and a concave part is arranged on the peripheral surface of the middle part of the static contact corresponding to the second convex part of the ceramic cover so as to ensure the gap between the static contact and the hole wall of the through hole of the ceramic cover.
The lower part of the static contact is provided with a step with a downward step surface, the upper surface of the protective ring is abutted against the step of the static contact, and the lower surface of the protective ring is provided with a retaining ring so as to clamp and fix the protective ring at a corresponding position of the lower part of the static contact by utilizing the matching of the retaining ring and the step of the static contact.
The check ring is a quincuncial check ring which comprises a circle body and a plurality of elastic tongues arranged in the circle body; the plum blossom retaining ring is fixed in the static contact through a plurality of elastic tongue pieces.
The fixed position of the lower part of the static contact, which corresponds to the elastic tongue piece of the plum blossom check ring, is provided with a first groove, and the tail end of the elastic tongue piece of the plum blossom check ring is propped against the first groove of the static contact.
The retainer ring is a clamping ring which comprises an elastic ring body with an opening; and a second groove is formed in the fixed part of the lower part of the static contact, which corresponds to the retainer ring, and the clamping ring is clamped and matched in the second groove of the static contact.
The retainer ring and the guard ring are of an integrated structure.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model adopts the lower part of the static contact, and is also provided with a protective ring which surrounds the outer peripheral surface of the static contact and is not contacted with the ceramic cover at the through hole part which is close to the ceramic cover; the outline of the periphery of the protective ring is larger than the through hole of the top wall of the ceramic cover. The utility model discloses a this kind of structure can utilize sheltering from of guard ring to the through-hole of the roof of ceramic cover, prevents that electric arc splash from getting into in the clearance between the pore wall of the through-hole of static contact and ceramic cover to can increase creepage distance and the insulation resistance through this route of ceramic cover between electric conductor and the static contact below the ceramic cover.
2. The utility model discloses owing to adopted the higher authority of guard ring to be equipped with at least one annular first convex part that does not contact with the pottery cover. The utility model discloses a this kind of structure can utilize sheltering from of first convex part, further prevents that the electric arc splash from getting into in the clearance between the pore wall of the through-hole of static contact and ceramic cover to can increase creepage distance and the insulation resistance through this route of ceramic cover between electric conductor and the static contact below the ceramic cover.
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 view of a partial configuration of a first embodiment of the present invention;
FIG. 2 is a sectional view of a partial configuration of a first embodiment of the present invention;
FIG. 3 is an enlarged schematic view of section A of FIG. 2;
fig. 4 is a schematic perspective view of a retainer ring according to a first embodiment of the present invention;
FIG. 5 is a sectional view of a partial configuration of a second embodiment of the invention;
FIG. 6 is an enlarged schematic view of section B of FIG. 5;
fig. 7 is a schematic perspective view of a retainer ring according to a second embodiment of the present invention;
FIG. 8 is a sectional view of a partial configuration of a third embodiment of the invention;
FIG. 9 is an enlarged schematic view of section C of FIG. 8;
FIG. 10 is an exploded schematic view of a partial configuration of a fourth embodiment of the invention;
FIG. 11 is a sectional view of a partial configuration of a fourth embodiment of the invention;
FIG. 12 is an enlarged schematic view of section D of FIG. 11;
fig. 13 is a sectional view of a partial configuration of a fifth embodiment of the present invention;
fig. 14 is an enlarged schematic view of a portion E in fig. 13.
Detailed Description
Example one
Referring to fig. 1 to 4, the high voltage dc relay of the present invention includes a ceramic cover 3, two static contacts 2 and a movable contact 1, which are used for providing current inflow and outflow respectively; the two static contacts 2 are respectively arranged on the top wall 31 of the ceramic cover 3, the lower parts of the two static contacts 2 respectively extend into the cavity of the ceramic cover 3, and two ends of the movable spring leaf 1 are respectively matched with the bottom ends of the two static contacts 2; a through hole 32 is formed in the top wall 31 of the ceramic cover 3, and the outer peripheral surface of the middle part of the static contact 2 is in clearance fit with the hole wall of the through hole 32 of the ceramic cover 3; in the lower part of the static contact 2, a protective ring 4 which surrounds the peripheral surface of the static contact 2 and is not in contact with the ceramic cover 3 is also arranged at the position close to the through hole 32 of the ceramic cover 3; the protective ring 4 can be made of metal materials or nonmetal materials, wherein the metal materials comprise stainless steel, copper, alloy and the like, and the nonmetal materials comprise epoxy resin plastics, ceramics or glass and the like; the outline of the periphery of the protective ring 4 is larger than the through hole 32 of the top wall 31 of the ceramic cover 3, so that arc spatters are prevented from entering a gap between the static contact 2 and the hole wall of the through hole 32 of the ceramic cover 3 by shielding the through hole 32 of the top wall 31 of the ceramic cover 3 by the protective ring 4, and the creepage distance and the insulation resistance between the conductor (namely, the frame piece 5 of the relay, which is connected between the bottom end of the ceramic cover 3 and the yoke plate) below the ceramic cover 3 and the static contact 2 through the path of the ceramic cover 3 can be increased.
In this embodiment, the upper surface of the guard ring 4 is further provided with an annular first protrusion 41 extending towards the top wall 31 of the ceramic cover 3, so as to prevent the arc spatters from entering a gap between the static contact 2 and the hole wall of the through hole 32 of the ceramic cover 3 by shielding of the first protrusion 41, thereby increasing a creepage distance and an insulation resistance between the conductor below the ceramic cover 3 and the static contact 2 through the path of the ceramic cover.
In this embodiment, a first protrusion 41 on the upper surface of the guard ring is provided at the edge of the guard ring 4.
It should be noted that, in the present invention, the terms "upper", "middle", "lower", "inner", "outer", "top" and the like denote orientation definitions, and only denote relative positional relationships between components or between structures in the components in a certain state, for example, the top wall 31 of the ceramic cover 3 denotes a wall of the ceramic cover in a top position in a state in which the opening is downward.
In this embodiment, the lower portion of the static contact 2 is provided with a step 21 with a downward step surface, the upper surface of the protection ring 4 abuts against the step 21 of the static contact 2, and the lower surface of the protection ring 4 is provided with a retaining ring 6, so that the protection ring 4 is clamped and fixed at a corresponding position of the lower portion of the static contact 2 by the cooperation of the retaining ring 6 and the step 21 of the static contact 2.
In this embodiment, the retainer ring 6 is a quincuncial retainer ring, and the quincuncial retainer ring 6 includes a ring-shaped body 61 and a plurality of elastic tongues 62 arranged in the ring-shaped body; the plum blossom shaped retaining ring 6 is fixed on the static contact 2 through the plurality of elastic tongues 62. Specifically, the protection ring 4 is sleeved into the static contact 2 from bottom to top until the upper surface of the protection ring 4 abuts against the step 21 of the static contact 2, then the plum blossom-shaped check ring 6 is sleeved into the static contact 2 from bottom to top until the plum blossom-shaped check ring 6 abuts against the lower surface of the protection ring 4, and the plum blossom-shaped check ring 6 and the static contact 2 are fixed by clamping the plurality of elastic tongues 62 on the static contact 2, so that the protection ring 4 is clamped and fixed at the lower part of the static contact 2.
In this embodiment, a first groove 22 is formed at a fixed position of the lower portion of the static contact 2 corresponding to the elastic tongue 62 of the quincunx retainer ring 6, and a tail end of the elastic tongue 62 of the quincunx retainer ring 6 abuts against the first groove 22 of the static contact 2.
The utility model discloses a high voltage direct current relay, which adopts the lower part of a static contact 2, and is also provided with a protective ring 4 which surrounds the outer peripheral surface of the static contact 2 and is not contacted with a ceramic cover at the through hole 32 which is close to the ceramic cover 3; the peripheral edge of the guard ring 4 has a contour larger than the through hole 32 of the top wall 31 of the ceramic cover 2, and an annular first projection 41 which does not contact the ceramic cover is provided on the guard ring. The utility model discloses a this kind of structure can utilize sheltering from of the first convex part of guard ring and guard ring, prevents that the electric arc splash from getting into in the clearance between the pore wall of the through-hole 32 of static contact 2 and ceramic cover 3 to can increase creepage distance and the insulation resistance through this route of ceramic cover 3 between electric conductor and the static contact 2 below the ceramic cover 3.
Example two
Referring to fig. 5 to 7, a difference between the high voltage dc relay of the present invention and the first embodiment is that the retainer ring is a clamping ring 7, and the clamping ring 7 includes an elastic ring body 71 having an opening 72; a second groove 23 is formed in the fixing position of the lower portion of the static contact 2, which corresponds to the retainer ring, and the clamping ring 7 is clamped and matched in the second groove 23 of the static contact 2.
EXAMPLE III
Referring to fig. 8 to 9, a difference between the high voltage dc relay of the present invention and the first embodiment is that two first protrusions 41 are disposed on the guard ring 4, and the two first protrusions are sequentially arranged from the edge of the guard ring 4 to the inside, that is, the first protrusion has one edge and one inner side, and the diameter of the ring shape of the innermost first protrusion 41 is larger than the diameter of the through hole 32 of the top wall 31 of the ceramic cover 3.
Of course, the first protrusion 41 may also be more than two, such as three, four or more, etc.
The utility model discloses a high voltage direct current relay has adopted the higher authority of guard ring to be equipped with two or more first convex parts 41. The utility model discloses a this kind of structure has formed multiple protection, can prevent effectively that electric arc splash from getting into in the clearance between the pore wall of the through-hole of static contact and ceramic cover to creep distance and insulation resistance through this route of ceramic cover between electric conductor and the static contact below the ceramic cover can greatly increase.
Example four
Referring to fig. 10 to 12, the difference between the high voltage dc relay of the present invention and the first embodiment is that the retaining ring and the guard ring 4 are of an integral structure, so that the guard ring 4 has a plurality of elastic tongues 42 for stopping, and the first groove 22 on the static contact 2 is equivalent to a slot, and the elastic tongues 42 of the guard ring 4 are directly clamped in the slot of the static contact 2, so that the guard ring 4 is fixed on the static contact 2.
EXAMPLE five
Referring to fig. 13 to 14, a difference between the high voltage dc relay of the present invention and the fourth embodiment is that a second protrusion 33 is protruded toward the center line of the through hole 32 in the hole wall of the through hole 32 of the ceramic cover 3; the circumferential surface of the middle part of the static contact 2 is provided with a concave part 24 corresponding to the position of the second convex part 33 of the ceramic cover 3, so as to ensure the gap between the static contact 2 and the hole wall of the through hole 31 of the ceramic cover 3.
The utility model discloses a this kind of structure utilizes the cooperation of second convex part 33 and depressed part 24, can further increase creepage distance and the insulation resistance through this route of ceramic cover 3 between electric conductor below the ceramic cover 3 and the static contact 2.
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 comprises a ceramic cover, two static contacts and a movable reed, wherein the two static contacts are used for providing current inflow and current outflow respectively; the two static contacts are respectively arranged on the top wall of the ceramic cover, the lower parts of the two static contacts respectively extend into the cavities of the ceramic cover, and two ends of the movable spring leaf are respectively matched with the bottom ends of the two static contacts; the method is characterized in that: the top wall of the ceramic cover is provided with a through hole, and the outer peripheral surface of the middle part of the static contact is in clearance fit with the hole wall of the through hole of the ceramic cover; in the lower part of the static contact, a protective ring which surrounds the peripheral surface of the static contact and is not contacted with the ceramic cover is also arranged at the through hole close to the ceramic cover; the outline of the periphery of the protective ring is larger than the through hole of the top wall of the ceramic cover, so that electric arc splashes are prevented from entering a gap between the static contact and the hole wall of the through hole of the ceramic cover by utilizing the shielding of the protective ring on the through hole of the top wall of the ceramic cover, and the creepage distance and the insulation resistance of a path passing through the ceramic cover between the electric conductor below the ceramic cover and the static contact can be increased.
2. The high-voltage direct current relay according to claim 1, characterized in that: the upper surface of the protective ring is also provided with at least one annular first convex part which is not contacted with the ceramic cover in an extending way towards the top wall direction of the ceramic cover, so that electric arc splashing is prevented from entering a gap between the static contact and the hole wall of the through hole of the ceramic cover by utilizing the shielding of the first convex part, and the creepage distance and the insulation resistance between the electric conductor below the ceramic cover and the static contact through the path of the ceramic cover can be increased.
3. The high-voltage direct current relay according to claim 2, characterized in that: a first convex part is arranged on the guard ring, and the first convex part is arranged at the edge of the guard ring.
4. The high-voltage direct current relay according to claim 2, characterized in that: more than two first convex parts are arranged on the guard ring, the more than two first convex parts are arranged inwards from the edge of the guard ring in sequence, and the diameter of the ring of the innermost first convex part is larger than the aperture of the through hole of the top wall of the ceramic cover.
5. The high-voltage direct current relay according to claim 1 or 2 or 3 or 4, characterized in that: a second convex part is convexly extended towards the central line direction of the through hole in the hole wall of the through hole of the ceramic cover; and a concave part is arranged on the peripheral surface of the middle part of the static contact corresponding to the second convex part of the ceramic cover so as to ensure the gap between the static contact and the hole wall of the through hole of the ceramic cover.
6. The high-voltage direct current relay according to claim 1 or 2 or 3 or 4, characterized in that: the lower part of the static contact is provided with a step with a downward step surface, the upper surface of the protective ring is abutted against the step of the static contact, and the lower surface of the protective ring is provided with a retaining ring so as to clamp and fix the protective ring at a corresponding position of the lower part of the static contact by utilizing the matching of the retaining ring and the step of the static contact.
7. The high-voltage direct current relay according to claim 6, characterized in that: the check ring is a quincuncial check ring which comprises a circle body and a plurality of elastic tongues arranged in the circle body; the plum blossom retaining ring is fixed in the static contact through a plurality of elastic tongue pieces.
8. The high-voltage direct current relay according to claim 7, characterized in that: the fixed position of the lower part of the static contact, which corresponds to the elastic tongue piece of the plum blossom check ring, is provided with a first groove, and the tail end of the elastic tongue piece of the plum blossom check ring is propped against the first groove of the static contact.
9. The high-voltage direct current relay according to claim 6, characterized in that: the retainer ring is a clamping ring which comprises an elastic ring body with an opening; and a second groove is formed in the fixed part of the lower part of the static contact, which corresponds to the retainer ring, and the clamping ring is clamped and matched in the second groove of the static contact.
10. The high-voltage direct current relay according to claim 6, characterized in that: the retainer ring and the guard ring are of an integrated structure.
11. The high-voltage direct current relay according to claim 5, characterized in that: the lower part of the static contact is provided with a step with a downward step surface, the upper surface of the protective ring is abutted against the step of the static contact, and the lower surface of the protective ring is provided with a retaining ring so as to clamp and fix the protective ring at a corresponding position of the lower part of the static contact by utilizing the matching of the retaining ring and the step of the static contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121067485.8U CN215118775U (en) | 2021-05-18 | 2021-05-18 | High-voltage direct-current relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121067485.8U CN215118775U (en) | 2021-05-18 | 2021-05-18 | High-voltage direct-current relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215118775U true CN215118775U (en) | 2021-12-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121067485.8U Active CN215118775U (en) | 2021-05-18 | 2021-05-18 | High-voltage direct-current relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215118775U (en) |
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2021
- 2021-05-18 CN CN202121067485.8U patent/CN215118775U/en active Active
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