CN109755051B - Switching selector of combined type vacuum arc extinction on-load voltage regulating switch - Google Patents
Switching selector of combined type vacuum arc extinction on-load voltage regulating switch Download PDFInfo
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- CN109755051B CN109755051B CN201910079719.1A CN201910079719A CN109755051B CN 109755051 B CN109755051 B CN 109755051B CN 201910079719 A CN201910079719 A CN 201910079719A CN 109755051 B CN109755051 B CN 109755051B
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Abstract
The invention discloses a switching selector of a combined type vacuum arc-extinguishing on-load voltage regulating switch, which realizes that the combined type vacuum arc-extinguishing on-load voltage regulating switch of a power transformer is converted from linear voltage regulation to positive and negative voltage regulation, and comprises: the device comprises a polarity conversion operating mechanism, a polarity conversion contact assembly, a K point transition contact assembly and a transition slip ring assembly; the invention adopts an overhead structure, has unique structure and does not damage the original structure of the linear adjustment; the structure is simple, the manufacturing process is simplified, the mechanical structure is reliable, the action is accurate, and the safety and reliability of the product are ensured; the integral slip ring realizes a decomposable structure, ensures that the K point conversion is not powered off, simultaneously has a core-pulling function, is convenient to repair and maintain, and saves maintenance cost.
Description
Technical Field
The invention relates to a transformer switching technology, in particular to a switching selector of a combined type vacuum arc-extinguishing on-load voltage regulating switch.
Background
The existing on-load voltage regulating switch for a transformer in a power system is basically divided into an oil arc extinguishing switch and a vacuum switch. In recent years, the vacuum switch technology is rapidly developed, the manufacturing technology level and the product quality are greatly improved, and the requirements of domestic electric power development can be met. Along with the increase of labor cost and environmental protection cost, the advantages of the whole life cycle of the vacuum on-load switch are more and more obvious, the proportion of renewable energy sources is increased, the intelligent power grid is developed, the voltage regulation requirement is increased, the operation frequency of the on-load switch is also increased, and the vacuum switch is a trend to replace an oil arc extinguishing switch.
The vacuum switch is divided into three types of linear regulation, positive and negative regulation and coarse and fine regulation according to a voltage regulation circuit. The German company abroad and several large-scale companies in China have produced corresponding products, but most of positive and negative regulating switches are only M type and VV type based on the improvement of the oil arc extinguishing switch, and the switches have similar basic structures, large volume and complex structures and have high requirements on processing technology, assembly technology and materials. There is no vacuum on-load positive and negative switching product in the 10kv line.
Disclosure of Invention
The invention aims to provide a switching selector of a combined type vacuum arc extinction on-load voltage regulating switch, which enables a V-shaped vacuum switch (namely a combined type switch) to be converted from linear voltage regulation to positive and negative voltage regulation. The structure is simple, the processing is convenient, the mechanical structure is reliable, the operation is stable, and the integral slip ring can realize a decomposable structure, so that the core pulling maintenance in the future is convenient. Is a brand new structure for positive and negative voltage regulation of the V-shaped composite vacuum switch.
The technical scheme of the invention is as follows: a switching selector of a combined type vacuum arc extinction on-load voltage regulating switch, which realizes that the combined type vacuum arc extinction power transformer on-load voltage regulating switch is converted into positive and negative voltage regulating from linear voltage regulating, the switching selector comprises: the polarity conversion operating mechanism 1, the polarity conversion contact assembly 2, the K point transition contact assembly 3 and the transition slip ring assembly 4;
the polarity conversion operating mechanism 1 comprises a lock wheel connecting disc 1-1, a polarity conversion fixed shaft 1-2, a polarity limiting block 1-3, a polarity shifting fork 1-4, a polarity conversion supporting disc 1-5, a polarity shifting lever 1-6 and a polarity conversion shaft 1-7; the main shaft II 7 is fixed on the polarity conversion shaft 1-7 and is inserted into the main shaft I5; the lock wheel connecting disc 1-1 is fixed on the main shaft I5 and rotates along with the main shaft I5, and the lock wheel connecting disc 1-1 comprises a base disc 1-1a, an annular limiting table 1-1b with a notch and arranged on the upper layer of the base disc 1-1a and a roller 1-1c arranged on the lower layer of the base disc 1-1 a; the polarity limiting block 1-3 is arranged above the polarity shifting fork 1-4, the polarity shifting rod 1-6 is arranged below the polarity shifting fork 1-4, and the polarity limiting block 1-3, the polarity shifting fork 1-4 and the polarity shifting rod 1-6 are connected below the bottom plate 6 through the polarity conversion fixed shaft 1-2; the front part of the polar limiting block 1-3 is provided with 3 downward limiting protrusions 1-3a, and the limiting protrusions 1-3a are matched with the annular limiting table 1-1b with the notch to realize limiting; the front part of the polarity shifting fork 1-4 is provided with a notch 1-4a, and the notch 1-4a is matched with the roller 1-1c to realize shifting; the front part of the polarity deflector rod 1-6 is provided with a downward deflector head 1-6a; the polarity conversion supporting disc 1-5 is provided with a poking hole 1-5a matched with the poking head 1-6a;
the polarity conversion contact assembly 2 comprises a polarity moving contact 2-1, a polarity fixed contact 2-2 and an insulating disc I2-3; the number of the polar moving contacts 2-1 is 3, and the polar moving contacts are fixed at equal intervals at the circumferential positions of the insulating disc I2-3; the number of the polarity fixed contacts 2-2 is 3 groups, and the polarity fixed contacts are fixed at the circumferential position of the insulating sealing cylinder 8 at equal intervals;
the K point transition contact assembly 3 comprises a K point transition contact 3-1, a K point transition fixed contact 3-2 and an insulating disc II 3-3; the number of the K point transition contacts 3-1 is 3, and the K point transition contacts are fixed at equal intervals at the circumferential positions of the insulating disc II 3-3; the number of the K point transition fixed contacts 3-2 is 3, and the K point transition fixed contacts are fixed at equal intervals at the circumferential position of the insulating sealing cylinder 8;
the polarity conversion support disc 1-5 is connected to the polarity conversion shaft 1-7 in a rolling way through a bearing, and the peripheries of the polarity conversion support disc 1-5, the insulation disc I2-3 and the insulation disc II 3-3 are connected to form an insulation cylinder;
the transition slip ring assembly 4 comprises 3 layers of transition slip rings 4-1 which are connected into a whole through insulating strips 4-2, spring compression contacts 4-3 are arranged at two ends of the transition slip rings 4-1, and the spring compression contacts 4-3 are compressed on a slip ring fixing block 9-1 of the slip ring 9.
Preferably, the polarity limiting block 1-3, the polarity shifting fork 1-4 and the polarity shifting lever 1-6 are integrally formed.
The invention has the following structural principle: when the main shaft I5 rotates to the K point, the polarity conversion operating mechanism 1 rotates under the drive of the main shaft I5 to drive the polarity conversion contact assembly 2 and the K point transition contact assembly 3 to rotate, the polarity moving contact 2-1 is disconnected from the polarity fixed contact 2-2 '+' to be combined with the polarity fixed contact 2-2"K-K ', the K point transition contact 3-1 is combined with the K point transition fixed contact 3-2, and when the main shaft I5 rotates to leave from the K point, the polarity moving contact 2-1 is disconnected from the polarity fixed contact 2-2"K-K' to be combined with the polarity fixed contact 2-2 '-' to be disconnected from the K point transition contact 3-1 and the K point transition fixed contact 3-2 to complete polarity conversion.
The invention has the following beneficial effects:
the invention adopts an overhead structure, has unique structure and does not damage the original structure of the linear adjustment; the structure is simple, the manufacturing process is simplified, the mechanical structure is reliable, the action is accurate, and the safety and reliability of the product are ensured; the integral slip ring realizes a decomposable structure, ensures that the K point conversion is not powered off, simultaneously has a core-pulling function, is convenient to repair and maintain, and saves maintenance cost.
Drawings
FIG. 1 is a schematic view of the installation of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic structural view of a polarity inversion operation mechanism according to the present invention 1;
FIG. 4 is a schematic structural view of a polarity inversion operation mechanism according to the present invention;
FIG. 5 is a schematic diagram of a polarity inversion operation mechanism according to the present invention;
FIG. 6 is a schematic structural view of a lock cylinder connection plate according to the present invention;
FIG. 7 is a schematic view of a polarity reversing contact assembly according to the present invention;
FIG. 8 is a schematic view of the structure of the K point transition contact assembly of the present invention;
FIG. 9 is an elevation view of a transition slip ring assembly of the present invention;
FIG. 10 is a plan view of a transition slip ring assembly of the present invention;
FIG. 11 is a wiring diagram of the contacts and switches of the present invention;
FIG. 12 is a diagram of electrical waveforms of the contacts of the present invention;
in the figure: 1. a polarity switching operation mechanism; 1-1, a lock wheel connecting disc; 1-1a, a base plate; 1-1b, an annular limiting table with a notch; 1-1c, idler wheels; 1-2, a polarity conversion fixed shaft; 1-3, a polarity limiting block; 1-3a, limiting protrusions; 1-4, a polarity shifting fork; 1-4a, a notch; 1-5, a polarity conversion support plate; 1-5a, hole pulling; 1-6, a polarity deflector rod; 1-6a, a poking head; 1-7, a polarity conversion shaft; 2. a polarity-reversing contact assembly; 2-1, a polarity moving contact; 2-2, a polarity fixed contact; 2-3, insulating disc I; 3. a K point transition contact assembly; 3-1, a K point transition contact; 3-2, a K point transition fixed contact; 3-3, insulating disc II; 4. a transition slip ring assembly; 4-1, a transitional slip ring; 4-2, insulating strips; 4-3, pressing the contact by a spring; 5. a main shaft I; 6. a bottom plate; 7. a main shaft II; 8. an insulating sealing cylinder; 9. a slip ring; 9-1, slip ring fixed blocks; 10. a driving mechanism; 11. a contact assembly; 12. a circuit breaking mechanism; 13. and (5) sealing the box.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
As shown in fig. 1-12, a switching selector for a composite vacuum arc-extinguishing on-load voltage regulating switch, which realizes that the composite vacuum arc-extinguishing on-load voltage regulating switch of a power transformer is converted from linear voltage regulation to positive and negative voltage regulation, comprises: the polarity conversion operating mechanism 1, the polarity conversion contact assembly 2, the K point transition contact assembly 3 and the transition slip ring assembly 4;
the polarity conversion operating mechanism 1 comprises a lock wheel connecting disc 1-1, a polarity conversion fixed shaft 1-2, a polarity limiting block 1-3, a polarity shifting fork 1-4, a polarity conversion supporting disc 1-5, a polarity shifting lever 1-6 and a polarity conversion shaft 1-7; the main shaft II 7 is fixed on the polarity conversion shaft 1-7 and is inserted into the main shaft I5; the lock wheel connecting disc 1-1 is fixed on the main shaft I5 and rotates along with the main shaft I5, and the lock wheel connecting disc 1-1 comprises a base disc 1-1a, an annular limiting table 1-1b with a notch arranged on the upper layer of the base disc 1-1a and a roller 1-1c arranged on the lower layer of the base disc 1-1 a; the polarity limiting block 1-3 is arranged above the polarity shifting fork 1-4, the polarity shifting rod 1-6 is arranged below the polarity shifting fork 1-4, and the polarity limiting block 1-3, the polarity shifting fork 1-4 and the polarity shifting rod 1-6 are connected below the bottom plate 6 through the polarity conversion fixing shaft 1-2; the front part of the polar limiting block 1-3 is provided with 3 downward limiting protrusions 1-3a, and the limiting protrusions 1-3a are matched with the annular limiting table 1-1b with the notch to realize limiting; the front part of the polarity shifting fork 1-4 is provided with a notch 1-4a, and the notch 1-4a is matched with the roller 1-1c to realize shifting; the front part of the polarity deflector rod 1-6 is provided with a downward deflector head 1-6a; the polarity conversion supporting disc 1-5 is provided with a poking hole 1-5a matched with the poking head 1-6a;
the polarity conversion contact assembly 2 comprises a polarity moving contact 2-1, a polarity fixed contact 2-2 and an insulating disc I2-3; the number of the polar moving contacts 2-1 is 3, and the polar moving contacts are fixed at equal intervals at the circumferential positions of the insulating disc I2-3; the number of the polarity fixed contacts 2-2 is 3 groups, and the polarity fixed contacts are fixed at the circumferential positions of the insulating sealing cylinder 8 at equal intervals;
the K point transition contact assembly 3 comprises a K point transition contact 3-1, a K point transition fixed contact 3-2 and an insulating disc II 3-3; the number of the K point transition contacts 3-1 is 3, and the K point transition contacts are fixed at equal intervals at the circumferential position of the insulating disc II 3-3; the number of the K point transition fixed contacts 3-2 is 3, and the K point transition fixed contacts are fixed at equal intervals at the circumferential position of the insulating sealing cylinder 8; the polarity moving contact 2-1 is connected with the K point transition contact 3-1 by a soft connecting line;
the polarity conversion support disc 1-5 is connected to the polarity conversion shaft 1-7 in a rolling way through a bearing, and the peripheries of the polarity conversion support disc 1-5, the insulating disc I2-3 and the insulating disc II 3-3 are connected to form an insulating cylinder;
the transition slip ring assembly 4 comprises 3 layers of transition slip rings 4-1 which are connected into a whole through insulating strips 4-2, spring compression contacts 4-3 are arranged at two ends of the transition slip rings 4-1, and the transition slip rings are compressed on slip ring fixing blocks 9-1 of the slip rings 9 through the spring compression contacts 4-3. The transition slip ring assembly 4 uses an insulating strip 4-2, the three-phase transition slip ring 4-1 is formed into a whole like a ladder, a switch is inserted from top to bottom, and the three-phase transition slip ring assembly is connected with the switch slip ring 9 in a mode of pressing the contact 4-3 by a spring so as to form a closed slip ring. The switch can realize core pulling maintenance while the switch is not powered off at any gear.
The polarity limiting block 1-3, the polarity shifting fork 1-4 and the polarity shifting lever 1-6 are integrally formed, and rotate under the stirring of the lock wheel connecting disc 1-1 to drive the polarity conversion supporting disc 1-5 to rotate, and the polarity moving contact 2-1 and the K point transition contact 3-1 rotate to complete polarity conversion.
The switching selector of the combined type vacuum arc extinction on-load voltage regulating switch adopts a lock wheel structure and a limit mechanism as the lock wheel connecting disc 1-1 and the polarity shifting fork 1-4, has accurate action and does not generate angle deviation.
When the main shaft I5 rotates to the point K, the lock wheel connecting disc 1-1 is driven by the main shaft I5 to stir the polarity shifting fork 1-4, so that the polarity shifting rod 1-6 drives the polarity conversion supporting disc 1-5 to rotate, and the polarity moving contact 2-1 and the point K transition contact 3-1 rotate from the initial position to the middle position of the point K (the conversion of the polarity switcher from +to K is completed). Wherein the transition slip ring 4-1 ensures that the switching process is not interrupted (the transition slip ring 4-1 is connected with the K point transition fixed contact 3-2). Because the spring is only used in K point conversion, long-term conduction is not needed, and the spring of the transition slip ring 4-1 presses the contact 4-3 to ensure the thermal stability of the transition slip ring.
The core pulling process of the invention is as follows:
1. the bottom plate 6 is removed from the sealing box 13.
2. And taking out the whole formed by the polarity conversion supporting disc 1-5, the fixed insulating disc 2-3 and the insulating disc 3-3.
3. The transition slip ring assembly 4 is removed.
4. The main shaft is rotated to the position of the transition slip ring assembly 4 and taken out.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (2)
1. The utility model provides a switching selector of compound vacuum arc extinction on-load voltage regulating switch, realizes that compound vacuum arc extinction power transformer on-load voltage regulating switch changes positive and negative voltage regulating from linear voltage regulating, its characterized in that, switching selector includes: the device comprises a polarity conversion operating mechanism (1), a polarity conversion contact assembly (2), a K point transition contact assembly (3) and a transition slip ring assembly (4);
the polarity conversion operating mechanism (1) comprises a lock wheel connecting disc (1-1), a polarity conversion fixed shaft (1-2), a polarity limiting block (1-3), a polarity shifting fork (1-4), a polarity conversion supporting rod (1-5), a polarity shifting rod (1-6) and a polarity conversion shaft (1-7); the main shaft II (7) is fixed on the polarity conversion shaft (1-7) and is inserted into the main shaft I (5); the lock wheel connecting disc (1-1) is fixed on the main shaft I (5) and rotates along with the main shaft I (5), and the lock wheel connecting disc (1-1) comprises a base disc (1-1 a), an annular limiting table (1-1 b) with a notch arranged on the upper layer of the base disc (1-1 a) and a roller (1-1 c) arranged on the lower layer of the base disc (1-1 a); the polarity limiting block (1-3) is arranged above the polarity shifting fork (1-4), the polarity shifting rod (1-6) is arranged below the polarity shifting fork (1-4), and the polarity limiting block (1-3), the polarity shifting fork (1-4) and the polarity shifting rod (1-6) are connected below the bottom plate (6) through the polarity conversion fixed shaft (1-2); the front part of the polar limiting block (1-3) is provided with 3 downward limiting protrusions (1-3 a), and the limiting protrusions (1-3 a) are matched with an annular limiting table (1-1 b) with a notch to realize limiting; the front part of the polarity shifting fork (1-4) is provided with a notch (1-4 a), and the notch (1-4 a) is matched with the roller (1-1 c) to realize shifting; the front part of the polarity deflector rod (1-6) is provided with a downward deflector head (1-6 a); a poking hole (1-5 a) matched with the poking head (1-6 a) is formed in the polarity conversion supporting disc (1-5);
the polarity conversion contact assembly (2) comprises a polarity moving contact (2-1), a polarity fixed contact (2-2) and an insulating disc I (2-3); the number of the polar moving contacts (2-1) is 3, and the polar moving contacts are fixed at equal intervals at the circumferential positions of the insulating disc I (2-3); the number of the polarity fixed contacts (2-2) is 3, and the polarity fixed contacts are fixed at equal intervals at the circumferential positions of the insulating sealing cylinder (8);
the K point transition contact assembly (3) comprises a K point transition contact (3-1), a K point transition fixed contact (3-2) and an insulating disc II (3-3); the number of the K point transition contacts (3-1) is 3, and the K point transition contacts are fixed at equal intervals at the circumferential position of the insulating disc II (3-3); the number of the K point transition fixed contacts (3-2) is 3, and the K point transition fixed contacts are fixed at equal intervals at the circumferential positions of the insulating sealing cylinder (8);
the polarity conversion support disc (1-5) is connected to the polarity conversion shaft (1-7) in a rolling way through a bearing, and the peripheries of the polarity conversion support disc (1-5), the insulation disc I (2-3) and the insulation disc II (3-3) are connected to form an insulation cylinder;
the transition slip ring assembly (4) comprises 3 layers of transition slip rings (4-1) which are connected into a whole through insulating strips (4-2), spring compression contacts (4-3) are arranged at two ends of the transition slip rings (4-1), and the transition slip rings are compressed on slip ring fixing blocks (9-1) of the slip rings (9) through the spring compression contacts (4-3).
2. The switching selector of the combined type vacuum arc extinction on-load voltage regulating switch according to claim 1, wherein the polarity limiting block (1-3), the polarity shifting fork (1-4) and the polarity shifting lever (1-6) are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079719.1A CN109755051B (en) | 2019-01-28 | 2019-01-28 | Switching selector of combined type vacuum arc extinction on-load voltage regulating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079719.1A CN109755051B (en) | 2019-01-28 | 2019-01-28 | Switching selector of combined type vacuum arc extinction on-load voltage regulating switch |
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| CN109755051A CN109755051A (en) | 2019-05-14 |
| CN109755051B true CN109755051B (en) | 2023-09-05 |
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| CN201910079719.1A Active CN109755051B (en) | 2019-01-28 | 2019-01-28 | Switching selector of combined type vacuum arc extinction on-load voltage regulating switch |
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| CN116504578B (en) * | 2023-04-10 | 2024-04-26 | 上海交通大学 | Vacuum on-load tap changer and voltage regulating method |
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| CN109755051A (en) | 2019-05-14 |
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