CN109841458B - Full-sealed high-voltage direct-current relay - Google Patents
Full-sealed high-voltage direct-current relay Download PDFInfo
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- CN109841458B CN109841458B CN201910111367.3A CN201910111367A CN109841458B CN 109841458 B CN109841458 B CN 109841458B CN 201910111367 A CN201910111367 A CN 201910111367A CN 109841458 B CN109841458 B CN 109841458B
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- 238000010891 electric arc Methods 0.000 claims abstract description 33
- 239000000919 ceramic Substances 0.000 claims abstract description 30
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 230000003068 static effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 8
- 230000008033 biological extinction Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 description 5
- 244000273256 Phragmites communis Species 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005068 transpiration Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a full-sealed high-voltage direct-current relay, which comprises two stationary contact leading-out ends, a movable reed, a ceramic cover and a plastic frame, wherein the movable reed is arranged on the ceramic cover; the two stationary contact leading-out ends are respectively arranged on the ceramic cover, and the upper part of the plastic frame is accommodated in the first cavity of the ceramic cover; the plastic frame is provided with a second cavity, the upper wall body of the second cavity is provided with a through hole, and the bottom of the stationary contact leading-out end extends into the second cavity of the plastic frame and is matched with the movable reed; an arc extinguishing magnetic steel is also arranged near the movable contact and the fixed contact, and the arc is led to a preset direction; in the side wall of the second cavity of the plastic frame, an open slot for guiding the electric arc out of the plastic frame is arranged in the direction corresponding to the preset electric arc. The invention can increase the arc extinguishing space and accelerate the extinction of the arc; but also can ensure the cleanness of the internal structure of the frame and increase the insulation resistance after the electric life; at the same time, the arc can also be cooled.
Description
Technical Field
The invention relates to the technical field of relays, in particular to a fully-sealed high-voltage direct-current relay.
Background
A relay is an electronically controlled device having a control system (also known as an input loop) and a controlled system (also known as an output loop), commonly used in automatic control circuits, which in effect is an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays roles of automatic regulation, safety protection, circuit switching and the like. The direct current relay is one of relays, and most of the existing direct current relays adopt a direct-acting scheme of a movable reed (also called a solenoid direct-acting scheme), wherein a contact part of the direct current relay comprises two fixed contacts and a movable component, the fixed contacts comprise fixed contacts and fixed contact leading-out ends, the movable component comprises a movable reed part and a push rod component, the movable reed part is composed of movable reeds and movable contacts arranged at two ends of the movable reeds, and the movable reeds are usually of a straight sheet type. In the prior art, a fully-sealed structure is adopted in the high-voltage direct-current relay, and for the insulation of products and the arrangement of auxiliary contacts, a plastic frame is generally added in a cavity, so that the space in the cavity is reduced, and the arc extinguishing space is correspondingly reduced. The plastic frame of the prior art high-voltage direct current relay is mainly provided with a closed cavity in a closed mode, the fixed contact and the movable contact are accommodated in the cavity of the plastic frame, the upper wall of the cavity of the plastic frame is provided with a through hole which can enable the leading-out end of the fixed contact to extend in, and the high-voltage direct current relay in the prior art has the following defects: the arc extinguishing space is small, and the arc discharging time is long; (2) The vapor generated in the arc discharge process is accumulated in the cavity of the plastic frame to pollute the cavity, so that the insulation resistance is seriously reduced after the electric life.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a full-sealed high-voltage direct-current relay, which can increase the arc extinguishing space and accelerate the extinguishing of an arc through the structural improvement of a plastic frame; on the other hand, the cleaning of the internal structure of the frame can be ensured, and the insulation resistance after the electric life is prolonged; at the same time, the arc can also be cooled.
The technical scheme adopted for solving the technical problems is as follows: a full-sealed high-voltage direct-current relay comprises two static contact leading-out ends, a movable reed, a ceramic cover and a plastic frame; the bottom end of the fixed contact leading-out end is provided with a fixed contact, and the two ends of the movable reed are provided with movable contacts; the two stationary contact leading-out ends are respectively arranged on the ceramic cover, the ceramic cover is provided with a first cavity with a downward opening, and the upper part of the plastic frame is accommodated in the first cavity of the ceramic cover; the plastic frame is provided with a second cavity, the upper wall body of the second cavity of the plastic frame is provided with a through hole, and the bottom of the leading-out end of the fixed contact extends into the second cavity of the plastic frame through the through hole and is matched with a movable reed accommodated in the second cavity so as to realize the contact or separation of the movable contact and the fixed contact; an arc extinguishing magnetic steel is also arranged near the movable contact and the fixed contact, and the arc is led to a preset direction; in the side wall of the second cavity of the plastic frame, an open slot for guiding the electric arc out of the plastic frame is arranged in the direction corresponding to the preset electric arc.
The open slot of the plastic frame also extends from the upper wall body of the second cavity of the plastic frame to the direction of the through hole and is communicated with the through hole.
The open slot of the plastic frame is positioned in the first cavity of the ceramic cover, so that the led-out electric arc can be led into the inner wall of the ceramic cover to be cooled and extinguished.
The open slot of the plastic frame is positioned outside the end corresponding to the connecting line of the leading-out ends of the two stationary contacts.
The open slot of the plastic frame is arranged at a position corresponding to the fixed contact arranged at the bottom end of the fixed contact leading-out end.
The fixed contact leading-out end and the fixed contact are of an integrated structure, and the movable reed and the movable contact are of an integrated structure.
The static contact is an independent part and is riveted at the bottom end of the leading-out end of the static contact; the movable contact is an independent part and is riveted at the corresponding end part of the movable reed.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the technical scheme that arc extinguishing magnetic steel is also arranged near the matching of the movable contact and the static contact, and the arc is led to the preset direction; in the side wall of the second cavity of the plastic frame, an open slot for guiding the electric arc out of the plastic frame is arranged in the direction corresponding to the preset electric arc. The structure breaks through the inertia thinking of the technicians in the field, and the open slot is arranged on the plastic frame corresponding to the movement direction of the electric arc, so that the arc extinguishing space is enlarged, the electric arc can be led out of the plastic frame, and the extinction of the electric arc is accelerated; secondly, the evaporable substances generated in the partial arc discharge process are transferred to the outside of the plastic frame through the open slot, so that the cleanness of the internal structure of the plastic frame is ensured, and the insulation resistance after the electric life is prolonged.
2. The invention adopts the structure that the open slot of the plastic frame also extends from the upper wall body of the second cavity of the plastic frame to the direction of the through hole and is communicated with the through hole. The structure of the invention further enlarges the opening area of the opening groove, which is equivalent to further enlarging the arc extinguishing space, so that the electric arc is easier to be led out of the plastic frame, and the transpiration substances generated in the process of partial arc discharge are easier to be transferred out of the plastic frame, thereby further ensuring the cleanness of the internal structure of the plastic frame and further increasing the insulation resistance after the electric life.
3. In the invention, the open slot of the plastic frame is arranged in the first cavity of the ceramic cover, so that the electric arc led out from the open slot can be led into the inner wall of the ceramic cover, and the electric arc is enabled to strike on the ceramic cover outside the plastic frame, thereby playing a role in cooling the electric arc.
The invention is described in further detail below with reference to the drawings and examples; but a full-sealed type high-voltage direct-current relay of the present invention is not limited to the embodiment.
Drawings
FIG. 1 is a cross-sectional view of the structure of the present invention;
FIG. 2 is a top view of two stationary contact terminals, a ceramic cover and a plastic frame of the present invention mated;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic perspective view of the two stationary contact terminals of the present invention mated with a plastic frame;
FIG. 5 is a schematic perspective view of the plastic frame of the present invention;
FIG. 6 is a top view of the plastic frame of the present invention;
fig. 7 is a sectional view taken along line B-B in fig. 6.
Detailed Description
Examples
Referring to fig. 1 to 7, the fully-sealed high-voltage direct-current relay comprises two fixed contact leading-out terminals 1, a movable reed 2, a ceramic cover 3 and a plastic frame; the plastic frame is composed of an upper plastic frame 4 and a lower plastic frame 5, the plastic frame is divided into the upper plastic frame 4 and the lower plastic frame 5 so as to be capable of being provided with a push rod assembly 6, the bottom end of a fixed contact lead-out end 1 is provided with a fixed contact, and two ends of a movable contact spring 2 are provided with movable contacts; of course, the stationary contact can also be an independent part, and the stationary contact is riveted at the bottom end of the stationary contact leading-out end; the movable contact can also be an independent part and is riveted at the corresponding end part of the movable reed; the two stationary contact leading-out terminals 1 are respectively arranged on the ceramic cover 3, the ceramic cover 3 is provided with a first cavity 31 with a downward opening, the upper part of the plastic frame is accommodated in the first cavity 31 of the ceramic cover 3, and particularly, the upper part of the upper plastic frame 4 is accommodated in the first cavity 31 of the ceramic cover 3; the plastic frame is provided with a second cavity 40, and the second cavity 40 is surrounded by an upper plastic frame 4 and a lower plastic frame 5; the upper wall body of the second cavity of the plastic frame is provided with a through hole, the upper wall body of the second cavity of the plastic frame is the upper wall body 41 of the upper plastic frame 4, and the upper wall body 41 of the upper plastic frame 4 is provided with a through hole 42; the bottom of the fixed contact leading-out end 1 extends into a second cavity of the plastic frame through the through hole 42 and is matched with the movable reed 2 accommodated in the second cavity so as to realize the contact or separation of the movable contact and the fixed contact; an arc-extinguishing magnetic steel is also arranged near the movable contact and the stationary contact in a matched manner, and an electric arc is led to a preset direction, and the movement direction of the electric arc can be set through setting the position and the polarity of the arc-extinguishing magnetic steel; in the side wall of the second cavity of the plastic frame, specifically in the side wall of the upper plastic frame 4, in a direction corresponding to the preset arc (i.e. the movement direction of the arc), there is also provided an open slot 43 which can lead the arc out of the plastic frame (i.e. the upper plastic frame 4).
In this embodiment, the open slot of the plastic frame further extends from the upper wall body of the second cavity of the plastic frame toward the through hole and is in communication with the through hole, and specifically, the open slot 43 of the upper plastic frame 4 further extends from the upper wall body 41 of the upper plastic frame 4 toward the through hole 42 and is in communication with the through hole 42.
In this embodiment, the plastic frame, i.e. the open slot 43 of the upper plastic frame 4, is located in the first cavity 31 of the ceramic cover 3, so that the led-out arc can be led into the inner wall of the ceramic cover 3 for cooling and extinguishing.
In this embodiment, the opening groove 43 of the plastic frame, i.e. the upper plastic frame 4, is located outside the end corresponding to the connection line of the two stationary contact leading-out ends. The open slot 43 can be arranged outside the end corresponding to the connecting line of the two stationary contact leading-out ends, and the magnetic field of the arc extinguishing magnetic steel is preset to enable the movement direction of the electric arc to move along the outside of the end corresponding to the connecting line of the two stationary contact leading-out ends. That is, the magnetic steel is arranged near the contact point, the arc blowing direction is set to be the same as the open slot, so that the arc is led to the open slot 43; in addition, the high temperature can be generated during the arcing, the air pressure in the plastic frame is larger than that in the outside of the plastic frame, at this time, under the action of thermal expansion and cold contraction, the air mass generated by the arcing can go out from the open slot 43 (corresponding to the arc discharge port), and in order to achieve the best effect, the position of the open slot is as high as possible with the static contact, so that the electric arc can be discharged conveniently.
The invention relates to a fully-sealed high-voltage direct-current relay, which adopts the structure that arc extinguishing magnetic steel is also arranged near the matching of a movable contact and a static contact, and an electric arc is led to a preset direction; in the side wall of the second cavity of the plastic frame, in a direction corresponding to the preset direction of the arc (i.e. the moving direction), there is also provided an open slot 43 for guiding the arc out of the plastic frame. The structure breaks through the inertia thinking of the technicians in the field, and an open slot (equivalent to an arc discharge port) is arranged on the plastic frame corresponding to the movement direction of the arc, so that the arc extinguishing space is enlarged, the arc can be led out of the plastic frame, and the extinction of the arc is accelerated; secondly, the evaporable substances generated in the partial arc discharge process are transferred to the outside of the plastic frame through the open slot, so that the cleanness of the internal structure of the plastic frame is ensured, and the insulation resistance after the electric life is prolonged.
The invention relates to a full-sealed high-voltage direct-current relay, which adopts the structure that an opening groove 43 of a plastic frame extends from an upper wall body 41 of a second cavity of the plastic frame to the direction of the through hole and is communicated with the through hole 42. The structure of the invention further enlarges the opening area of the opening groove, which is equivalent to further enlarging the arc extinguishing space, so that the electric arc is easier to be led out of the plastic frame, and the transpiration substances generated in the process of partial arc discharge are easier to be transferred out of the plastic frame, thereby further ensuring the cleanness of the internal structure of the plastic frame and further increasing the insulation resistance after the electric life.
In the fully sealed high-voltage direct-current relay, the open slot 43 of the plastic frame is arranged in the first cavity 31 of the ceramic cover, so that the electric arc led out from the open slot 43 can be led into the inner wall of the ceramic cover 3, and the electric arc is enabled to strike on the ceramic cover outside the plastic frame to play a role of cooling the electric arc.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or be modified to equivalent embodiments, without departing from the scope of the technology. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (7)
1. A full-sealed high-voltage direct-current relay comprises two static contact leading-out ends, a movable reed, a ceramic cover and a plastic frame; the bottom end of the fixed contact leading-out end is provided with a fixed contact, and the two ends of the movable reed are provided with movable contacts; the two stationary contact leading-out ends are respectively arranged on the ceramic cover, the ceramic cover is provided with a first cavity with a downward opening, and the upper part of the plastic frame is accommodated in the first cavity of the ceramic cover; the plastic frame is provided with a second cavity, the upper wall body of the second cavity of the plastic frame is provided with a through hole, and the bottom of the leading-out end of the fixed contact extends into the second cavity of the plastic frame through the through hole and is matched with a movable reed accommodated in the second cavity so as to realize the contact or separation of the movable contact and the fixed contact; the method is characterized in that: an arc extinguishing magnetic steel is also arranged near the movable contact and the fixed contact, and the arc is led to a preset direction; in the side wall of the second cavity of the plastic frame, an open slot for guiding the electric arc out of the plastic frame is arranged in the direction corresponding to the preset electric arc.
2. The fully sealed high voltage dc relay of claim 1, wherein: the open slot of the plastic frame also extends from the upper wall body of the second cavity of the plastic frame to the direction of the through hole and is communicated with the through hole.
3. The fully sealed high voltage dc relay according to claim 1 or 2, wherein: the open slot of the plastic frame is positioned in the first cavity of the ceramic cover, so that the led-out electric arc can be led into the inner wall of the ceramic cover to be cooled and extinguished.
4. The fully sealed high voltage dc relay of claim 1, wherein: the open slot of the plastic frame is positioned outside the end corresponding to the connecting line of the leading-out ends of the two stationary contacts.
5. The fully sealed high voltage dc relay of claim 1, wherein: the open slot of the plastic frame is arranged at a position corresponding to the fixed contact arranged at the bottom end of the fixed contact leading-out end.
6. The fully sealed high voltage dc relay of claim 1, wherein: the fixed contact leading-out end and the fixed contact are of an integrated structure, and the movable reed and the movable contact are of an integrated structure.
7. The fully sealed high voltage dc relay of claim 1, wherein: the static contact is an independent part and is riveted at the bottom end of the leading-out end of the static contact; the movable contact is an independent part and is riveted at the corresponding end part of the movable reed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910111367.3A CN109841458B (en) | 2019-02-12 | 2019-02-12 | Full-sealed high-voltage direct-current relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910111367.3A CN109841458B (en) | 2019-02-12 | 2019-02-12 | Full-sealed high-voltage direct-current relay |
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| Publication Number | Publication Date |
|---|---|
| CN109841458A CN109841458A (en) | 2019-06-04 |
| CN109841458B true CN109841458B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910111367.3A Active CN109841458B (en) | 2019-02-12 | 2019-02-12 | Full-sealed high-voltage direct-current relay |
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| WO2016029537A1 (en) * | 2014-08-25 | 2016-03-03 | 深圳市品川新智科技发展有限公司 | High-voltage direct-current contactor |
| CN106531563A (en) * | 2017-01-04 | 2017-03-22 | 昆山国力源通新能源科技有限公司 | Magnetic latching energy-saving high-voltage DC contactor |
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| CN108962681A (en) * | 2017-09-19 | 2018-12-07 | 厦门宏发电力电器有限公司 | A kind of high voltage direct current relay improving arc extinguishing ability by increasing creepage distance |
| CN209374358U (en) * | 2019-02-12 | 2019-09-10 | 厦门宏发电力电器有限公司 | Full seal type high voltage direct current relay |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7852178B2 (en) * | 2006-11-28 | 2010-12-14 | Tyco Electronics Corporation | Hermetically sealed electromechanical relay |
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2019
- 2019-02-12 CN CN201910111367.3A patent/CN109841458B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007305468A (en) * | 2006-05-12 | 2007-11-22 | Omron Corp | Electromagnetic relay |
| KR101034371B1 (en) * | 2011-03-10 | 2011-05-16 | 주식회사 와이엠텍 | Contact device for high voltage and high electric current |
| JP2012199137A (en) * | 2011-03-22 | 2012-10-18 | Panasonic Corp | Relay device |
| JP2013178930A (en) * | 2012-02-28 | 2013-09-09 | Fuji Electric Fa Components & Systems Co Ltd | Dc electromagnetic contactor |
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| CN109841458A (en) | 2019-06-04 |
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