CN213212066U - Normally closed high-voltage direct-current relay - Google Patents
Normally closed high-voltage direct-current relay Download PDFInfo
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- CN213212066U CN213212066U CN202022082489.5U CN202022082489U CN213212066U CN 213212066 U CN213212066 U CN 213212066U CN 202022082489 U CN202022082489 U CN 202022082489U CN 213212066 U CN213212066 U CN 213212066U
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Abstract
The utility model discloses a normally closed high voltage direct current relay, which comprises a relay body, two fixed contacts, a movable contact spring, a push rod, a magnetic circuit part, a movable iron core, a counter-force spring and a contact spring; the two static contacts are arranged at the top of the relay body, the magnetic circuit part is arranged in the relay body, and the movable iron core is arranged in the magnetic circuit part in a manner of moving up and down; the upper end of the push rod is movably connected with the movable contact piece, and the lower end of the push rod is fixedly connected with the movable iron core; the upper end of the contact spring is abutted against the movable contact piece, and the lower end of the contact spring is abutted against a supporting part arranged on the push rod; the upper end of the counter force spring is abutted against a limiting part arranged on the movable iron core or a limiting part arranged on the push rod, and the lower end of the counter force spring is abutted against a magnetic conduction component arranged in the relay body; in the power-off state of the magnetic circuit part, the movable contact is contacted with the two fixed contacts, and the counter force spring is compressed. The utility model discloses be in the closure state under normal condition, the coil does not need the circular telegram, greatly reduced power loss. The reaction spring is always in a compression state, and two ends of the reaction spring do not need to be fixed, so that the reaction spring is simple and convenient to install.
Description
Technical Field
The utility model relates to a high voltage direct current relay especially relates to a normally closed type high voltage direct current relay.
Background
The high-voltage direct-current relay generally comprises a relay body, two fixed contacts, a movable contact piece, a push rod, a movable iron core, a magnetic circuit part, a magnetic conduction component, a counter-force spring and a contact spring, wherein the movable contact piece, the push rod, the movable iron core, the magnetic circuit part, the counter-force spring and the contact spring are located in the relay body, the counter-force spring is used for enabling the movable iron core to reset, the contact spring is used for improving. The high-voltage direct relay is often applied to occasions requiring long-term charge and discharge, such as energy storage, charging piles and the like. Since the entire power supply circuit is in the energized state for a long time, the high-voltage relay needs to be in the closed state for a long time. If the normally open relay is used in the loop, the magnetic circuit part (particularly a coil of the magnetic circuit part) needs to be electrified for a long time, unnecessary power loss is caused, meanwhile, the function of the normally open relay is also influenced by the long-time electrification and heating of the magnetic circuit part, and the influence is an uncertain factor, so that the safety of the whole power supply loop is unreliable.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem to prior art exists provides a normally closed type high voltage direct current relay.
The utility model provides a technical scheme that its technical problem adopted is: a normally closed high-voltage direct-current relay comprises a relay body, two fixed contacts, a movable contact piece, a push rod, a magnetic circuit part, a movable iron core, a counter-force spring and a contact spring; the two static contacts are arranged at the top of the relay body, the magnetic circuit part is arranged in the relay body, and the movable iron core is arranged in the magnetic circuit part in a manner of moving up and down; the upper end of the push rod is movably connected with the movable contact piece, and the lower end of the push rod is fixedly connected with the movable iron core; the upper end of the contact spring is abutted against the movable contact piece, and the lower end of the contact spring is abutted against a supporting part arranged on the push rod; the upper end of the counter-force spring abuts against a limiting part arranged on the movable iron core or a limiting part arranged on the push rod, and the lower end of the counter-force spring abuts against a magnetic conductive part arranged in the relay body; in the power-off state of the magnetic circuit part, the movable contact is contacted with the two fixed contacts, the counter-force spring is compressed, and the movable iron core is kept at the highest position.
Furthermore, the magnetic conducting component is an iron cup, the magnetic circuit part, the movable iron core, the push rod and the movable contact piece are located in the iron cup, and the lower end of the counter force spring abuts against the inner bottom surface of the iron cup.
Furthermore, the counterforce spring is sleeved outside the lower end of the push rod, and the limiting part is a limiting boss arranged on the push rod or a lower step surface arranged on the push rod and facing downwards.
Further, the counter force spring is sleeved in the movable iron core, and the limiting part is a limiting boss arranged on the inner wall of the movable iron core or a lower step surface arranged on the inner wall of the movable iron core facing downwards.
Furthermore, the magnetic circuit part comprises a coil framework wound with a coil, a guide sleeve and a magnetic conduction plate, the magnetic conduction plate is positioned on the coil framework, the guide sleeve is sleeved in the coil framework, and the upper end of the guide sleeve is contacted with the magnetic conduction plate; the movable iron core is sleeved in the guide sleeve.
Furthermore, a guide piece is arranged in the iron cup, is sleeved outside the push rod and guides the movement of the movable contact spring.
Furthermore, the movable iron core is sleeved outside the lower end of the push rod, and is limited up and down through an upper limiting piece and a lower limiting piece which are arranged on the push rod.
Furthermore, the upper limiting piece is a first clamp spring sleeved on the push rod, and the lower limiting piece is a limiting boss arranged on the push rod.
Furthermore, the supporting part is an upper step surface arranged upwards on the push rod.
Furthermore, the upper end of the push rod penetrates through the movable contact spring and is sleeved with a second clamp spring.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses constitute a normally closed type high voltage direct current relay, be in the closed state under the normal condition, the magnetic circuit part does not need the circular telegram to greatly reduced power loss, and solve the long-term circular telegram of magnetic circuit part and produce the problem that generates heat, improve power supply circuit's fail safe nature. In addition, the reaction spring is always in a compressed state, so that the two ends of the reaction spring do not need to be connected and fixed, and the whole installation process is simpler and quicker.
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 a top view of the present invention in a closed state;
fig. 2 is a sectional view taken along line a-a of the present invention;
fig. 3 is a plan view of the disconnected state of the present invention;
fig. 4 is a B-B sectional view of the present invention.
Detailed Description
In an embodiment, please refer to fig. 1 to 4, a normally closed high-voltage direct-current relay of the present invention includes a relay body 1, two fixed contacts 2, a movable contact 3, a push rod 5, a magnetic circuit portion 8, a movable iron core 6, a counter force spring 7 and a contact spring 4; the two static contacts 2 are arranged on the top of the relay body 1, the magnetic circuit part 8 is arranged in the relay body 1, and the movable iron core 6 is arranged in the magnetic circuit part 8 in a vertically movable mode. The magnetic circuit part 8 specifically comprises a coil framework 82 wound with a coil 81, a guide sleeve 83 and a magnetic conduction plate 84, wherein the magnetic conduction plate 84 is positioned on the coil framework 82, the guide sleeve 83 is sleeved in the coil framework 82, and the upper end of the guide sleeve 82 is in contact with the magnetic conduction plate 84; the movable iron core 6 is sleeved in the guide sleeve 83. The push rod 5 can be arranged in the relay body 1 in a vertically moving mode, the upper end of the push rod 5 is movably connected with the movable contact piece 3, and the lower end of the push rod 5 is fixedly connected with the movable iron core 6. The upper end of the contact spring 4 is abutted against the movable contact 3, and the lower end of the contact spring 4 is abutted against a supporting part arranged on the pushing rod 5. The upper end of the counter force spring 7 abuts against a limiting part arranged on the movable iron core 6 or a limiting part arranged on the push rod 5, and the lower end of the counter force spring 7 abuts against a magnetic conduction component arranged in the relay body 1. In the power-off state of the coil 81 of the magnetic circuit part 8, the movable contact piece 3 is contacted with the two fixed contacts 2, the reaction force spring 7 is compressed, and the movable iron core 6 is kept at the highest position.
In this embodiment, the magnetic conducting component is an iron cup 20, the magnetic circuit portion 8, the movable iron core 6, the push rod 5 and the movable contact piece 3 are located in the iron cup 20, and the lower end of the reaction spring 7 abuts against the inner bottom surface of the iron cup 20.
In this embodiment, the reaction spring 7 is sleeved outside the lower end of the push rod 5, and the limiting portion of the push rod is a limiting boss 51, but not limited thereto, and in other embodiments, the limiting portion is a lower step surface arranged downward on the push rod 5.
In this embodiment, the relay body 1 includes a housing 11 and an upper cover 12, and the iron cup 12 is disposed in the housing 11; the upper cover 12 is provided at the top end opening of the housing 11, and a fixing ring 16 is provided at the inner side thereof. The two static contacts 2 are respectively arranged on an inner support cover 14 positioned at the top of the iron cup 12, and the upper ends of the two static contacts 2 respectively penetrate through the upper cover 12 in a sealing manner.
In this embodiment, a guide 15 is disposed in the iron cup 12, and the guide 15 is sleeved outside the push rod 5 and guides the movement of the movable contact piece 3.
In this embodiment, the movable iron core 6 is sleeved outside the lower end of the push rod 5, and is vertically limited by an upper limiting piece and a lower limiting piece which are arranged on the push rod 5. The upper limiting member is specifically a first clamp spring 9 sleeved on the push rod 5, the lower limiting member is specifically a limiting boss 51 arranged on the push rod 5, and the limiting boss 51 is the same as the limiting boss 51 matched with the upper end of the reaction spring 7, but not limited to this.
In this embodiment, the supporting portion is an upper step surface 52 disposed upward on the push rod 5, and the upper step surface 52 is annular. The upper end of the push rod 5 penetrates through the movable contact piece 3 and is sleeved with a second clamp spring 10.
The utility model discloses a normally closed type high voltage direct current relay, its theory of operation is: normal state, coil 81 are not circular telegram, and reaction spring 7 and contact spring 4 all are compressed, produce ascending counter-force, make movable contact piece 3 and two static contacts 2 contact, the utility model discloses be closed state, as shown in fig. 2. After the coil 81 is energized, the movable iron core 6 moves downward under the action of the magnetic field, the counter force spring 7 is further compressed, the contact spring 4 is released partially, the elastic force of the contact spring 4 on the movable contact piece 3 is reduced, and the movable contact piece 3 is separated from the two fixed contacts 2. When the movable iron core 6 moves downwards to contact with the inner bottom surface of the iron cup 12, a closed magnetic field is generated among the iron cup 20, the guide sleeve 83, the magnetic conduction plate 84 and the movable iron core 6 (as shown in fig. 4, the arrow indicates the direction of the magnetic field), and the movable contact piece 3 is completely disconnected from the two fixed contacts 2.
The utility model discloses a normally closed type high voltage direct current relay, be in the closure state under its normal condition, the coil does not need the circular telegram to greatly reduced power loss, and solve the long-term circular telegram of coil and produce the problem that generates heat. The reaction spring is always in a compressed state, so that two ends of the reaction spring do not need to be connected and fixed, and the whole installation process is simpler and quicker.
In other embodiments, the upper end of the counterforce spring abuts against a limit part arranged on the movable iron core. The reaction spring is specifically sleeved in the movable iron core, and the limiting part is a limiting boss arranged on the inner wall of the movable iron core or a lower step surface arranged on the inner wall of the movable iron core downwards.
The utility model discloses a normally closed type 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 embodiments are only used to further explain the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification of the technical entity of the present invention to the above embodiments all fall into the protection scope of the present invention.
Claims (10)
1. A normally closed high-voltage direct-current relay comprises a relay body, two fixed contacts, a movable contact piece, a push rod, a magnetic circuit part, a movable iron core, a counter-force spring and a contact spring; the two static contacts are arranged at the top of the relay body, the magnetic circuit part is arranged in the relay body, and the movable iron core is arranged in the magnetic circuit part in a manner of moving up and down; the upper end of the push rod is movably connected with the movable contact piece, and the lower end of the push rod is fixedly connected with the movable iron core; the upper end of the contact spring is abutted against the movable contact piece, and the lower end of the contact spring is abutted against a supporting part arranged on the push rod; the method is characterized in that: the upper end of the counter-force spring abuts against a limiting part arranged on the movable iron core or a limiting part arranged on the push rod, and the lower end of the counter-force spring abuts against a magnetic conductive part arranged in the relay body; in the power-off state of the magnetic circuit part, the movable contact is contacted with the two fixed contacts, the counter-force spring is compressed, and the movable iron core is kept at the highest position.
2. The normally closed high-voltage direct current relay according to claim 1, characterized in that: the magnetic conducting component is an iron cup, the magnetic circuit part, the movable iron core, the push rod and the movable contact piece are located in the iron cup, and the lower end of the counter force spring is abutted to the inner bottom surface of the iron cup.
3. The normally closed high-voltage direct current relay according to claim 1, characterized in that: the reaction spring is sleeved outside the lower end of the push rod, and the limiting part is a limiting boss arranged on the push rod or a lower step surface arranged on the push rod and facing downwards.
4. The normally closed high-voltage direct current relay according to claim 1, characterized in that: the reaction spring is sleeved in the movable iron core, and the limiting part is a limiting boss arranged on the inner wall of the movable iron core or a lower step surface arranged on the inner wall of the movable iron core downwards.
5. The normally closed high-voltage direct current relay according to claim 1, characterized in that: the magnetic circuit part comprises a coil framework wound with a coil, a guide sleeve and a magnetic conduction plate, the magnetic conduction plate is positioned on the coil framework, the guide sleeve is sleeved in the coil framework, and the upper end of the guide sleeve is in contact with the magnetic conduction plate; the movable iron core is sleeved in the guide sleeve.
6. The normally closed high-voltage direct current relay according to claim 2, characterized in that: the relay body comprises a shell and an upper cover, the iron cup is arranged in the shell, the upper cover is arranged at an opening at the top end of the shell, the two static contacts are respectively arranged on the inner support covers positioned at the tops of the iron cup, and the upper ends of the two static contacts respectively penetrate through the upper cover in a sealing mode.
7. The normally closed high-voltage direct current relay according to claim 2, characterized in that: the iron cup is internally provided with a guide piece which is sleeved outside the push rod and guides the movement of the movable contact spring.
8. The normally closed high-voltage direct current relay according to claim 1, characterized in that: the movable iron core is sleeved outside the lower end of the push rod and is limited up and down through an upper limiting piece and a lower limiting piece which are arranged on the push rod.
9. The normally closed high-voltage direct current relay according to claim 8, characterized in that: the upper limiting piece is a first clamp spring sleeved on the push rod, and the lower limiting piece is a limiting boss arranged on the push rod.
10. The normally closed high-voltage direct current relay according to claim 1, characterized in that: the supporting part is an upper step surface which is arranged on the push rod upwards; the upper end of the push rod penetrates through the movable contact spring and is sleeved with a second clamp spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022082489.5U CN213212066U (en) | 2020-09-21 | 2020-09-21 | Normally closed high-voltage direct-current relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022082489.5U CN213212066U (en) | 2020-09-21 | 2020-09-21 | Normally closed high-voltage direct-current relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213212066U true CN213212066U (en) | 2021-05-14 |
Family
ID=75822017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022082489.5U Active CN213212066U (en) | 2020-09-21 | 2020-09-21 | Normally closed high-voltage direct-current relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213212066U (en) |
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2020
- 2020-09-21 CN CN202022082489.5U patent/CN213212066U/en active Active
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