CN219610301U - High-current conductive dynamic connection structure for fast switch - Google Patents
High-current conductive dynamic connection structure for fast switch Download PDFInfo
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- CN219610301U CN219610301U CN202320620735.9U CN202320620735U CN219610301U CN 219610301 U CN219610301 U CN 219610301U CN 202320620735 U CN202320620735 U CN 202320620735U CN 219610301 U CN219610301 U CN 219610301U
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Abstract
The utility model discloses a high-current conductive movable connection structure for a quick switch, which comprises a movable end assembly and a movable end conductive bar, wherein the movable end assembly is provided with a movable conductive rod and a movable contact fixedly connected to one end of the movable conductive rod, a first connection part is arranged on the movable end conductive bar, a second connection part which is in plug-in fit with the first connection part is arranged on the other end of the movable conductive rod, and conductive contact fingers are respectively arranged on the second connection part and the first connection part, so that the second connection part can be in sliding electric connection with the first connection part when the second connection part is inserted on the first connection part. The conductive dynamic connection structure not only avoids the influence of the electric repulsive force between the busbar on the stability of the conductive dynamic connection structure, reduces the dynamic quality of the circuit breaker, and improves the switching-on and switching-off speed of the vacuum arc extinguishing chamber; the structure is simple, novel and reasonable, the conductive effect is good, the electric heating is low, the occupied space is small, the cost is low, the service life is long, and the electric heating switch is more suitable for high-speed switch and high-current on-off occasions.
Description
Technical Field
The utility model relates to the technical field of high-voltage high-current circuit breakers in power systems, in particular to a high-current conductive dynamic connection structure for a fast switch.
Background
Under the condition of high on-off current of the vacuum circuit breaker, the conductive loop is as follows: as shown in fig. 1, the current flows into the static-end conductive bar 41, flows through the vacuum interrupter break and the flexible connection wire 5 in sequence, and then flows into the movable-end conductive bar. The conductive connection structure in the vacuum circuit breaker plays an important role in the conduction current of the main loop, and the quality of the conductive connection directly influences the reliability and the service life of equipment.
In the existing conventional vacuum circuit breaker structure, the conductive connection structure mostly adopts: the movable end of the vacuum arc-extinguishing chamber is fixedly connected with the movable end conductive bar through a flexible connecting wire in a conductive connection mode. However, when a large current flows through the main circuit, the electric repulsive force F generated between the conductive bars acts on the flexible connecting wires, so that the flexible connecting wires drive the conductive rods to move, and the phenomenon that the movable contact and the static contact in the vacuum arc-extinguishing chamber are repelled is caused. Once the movable contact and the fixed contact are repelled, an arc can appear in a gap between the movable contact and the fixed contact and ablate the contact, and the phenomena of repulsion of the movable contact and the fixed contact, reclosing of the movable contact and repulsion of the fixed contact and … … can also appear under the action of contact pressure and electric repulsive force, so that after the phenomena are repeated, fusion welding can occur on the contact material, and finally the contact is burnt out, thereby affecting the stability of an electric connection structure.
In addition, the flexible connecting wire is used for electrically connecting the movable end of the vacuum arc-extinguishing chamber with the movable end conductive bar, and the movable mass of the circuit breaker is increased due to the fact that the flexible connecting wire is relatively large in mass, so that the work for driving the opening and closing actions of the vacuum arc-extinguishing chamber is large, the opening and closing speed of the vacuum arc-extinguishing chamber is difficult to improve, and the product performance is poor.
In view of this, the present utility model has been made.
Disclosure of Invention
In order to overcome the defects, the utility model provides a high-current conductive movable connection structure for a quick switch, which on one hand avoids the influence of electric repulsive force between bus bars on the stability of the conductive movable connection structure, reduces the movable quality of a circuit breaker and improves the switching-on and switching-off speed of a vacuum arc-extinguishing chamber; on the other hand, the novel high-voltage power supply has the advantages of simple, novel and reasonable structure, good conductive effect, low electric heating, small occupied space, low cost and long service life, and is more suitable for high-speed switch and high-current on-off occasions.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the large-current conductive dynamic connection structure for the quick switch comprises a dynamic end assembly and a dynamic end conductive bar, wherein the dynamic end assembly is provided with a dynamic conductive rod and a dynamic contact fixedly connected to one end of the dynamic conductive rod, and the dynamic end conductive bar is connected with the dynamic conductive rod; the movable end conducting bar is provided with a first connecting part, the other end of the movable conducting rod is provided with a second connecting part which is in plug-in fit with the first connecting part, and the second connecting part and the first connecting part are respectively provided with a conductive contact finger, so that the second connecting part can be in sliding electric connection with the first connecting part when being inserted into the first connecting part.
As a further improvement of the utility model, the movable conducting rod and the movable end conducting bar are arranged up and down based on the vertical placement state of the quick switch;
the first connecting portion is provided with a boss protruding from the upper surface of the movable end conducting bar and a ring groove A concavely arranged on the boss and with an upward opening, the second connecting portion is of a concave groove structure concavely arranged on the lower end of the movable conducting bar and with a downward opening, the second connecting portion is in plug-in fit with the ring groove A, and the second connecting portion and the inner side wall of the ring groove A are respectively provided with the conductive contact fingers.
As a further improvement of the present utility model, the movable conductive rod, the second connection portion and the ring groove a are arranged concentrically.
As a further improvement of the utility model, the ring groove A is one or more circles;
when the ring groove A is formed in multiple circles, the ring groove A is sequentially sleeved with multiple circles and is arranged at the same center line with the movable conducting rod; correspondingly, the number of the second connecting parts is also multiple, and the second connecting parts are also sleeved in sequence and are arranged at the same center line with the movable conducting rod, so that the second connecting parts are correspondingly inserted into the ring grooves A for multiple circles.
As a further improvement of the utility model, an annular groove B is concavely arranged on the inner side wall of the annular groove a, the conductive contact finger is arranged in the annular groove B, and the conductive contact finger arranged in the annular groove B is also abutted against the outer side wall of the second connecting part.
As a further improvement of the utility model, an annular groove C is concavely arranged on the inner side wall of the second connecting part, the conductive contact finger is arranged in the annular groove C, and the conductive contact finger arranged in the annular groove C is also abutted against the inner side wall of the annular groove a.
As a further improvement of the utility model, the conductive contact fingers on the inner side wall of the annular groove A and the conductive contact fingers on the inner side wall of the second connecting part are arranged in a staggered manner.
As a further improvement of the utility model, a perforation A is arranged on the boss in the middle, a perforation B is arranged on the top wall of the second connecting part in the middle, and the perforation A and the perforation B are respectively arranged on the same center line with the movable conducting rod and are respectively used for the operation rod of the quick switch to pass through.
As a further improvement of the utility model, the movable conducting rod is of a solid or hollow structure; the conductive contact finger adopts a watchband contact finger.
As a further improvement of the utility model, the fast switch also comprises an insulating shell and a vacuum arc-extinguishing chamber which is arranged in the insulating shell;
the upper end of the movable conducting rod and the movable contact on the movable conducting rod are both arranged in the vacuum arc-extinguishing chamber, and the lower end of the movable conducting rod and the second connecting part on the movable conducting rod are both arranged outside the vacuum arc-extinguishing chamber and are simultaneously arranged in the insulating shell;
one side of the movable end conducting bar and the first connecting part on the movable end conducting bar are both arranged in the insulating shell, and the other side of the movable end conducting bar extends out of the insulating shell in a sealing way and is fixedly connected with the insulating shell at the same time; or the middle part of the movable end conductive bar and the first connecting part on the movable end conductive bar are both arranged in the insulating shell, and the opposite two sides of the movable end conductive bar are respectively and hermetically extended out of the insulating shell and are fixedly connected with the insulating shell.
The beneficial effects of the utility model are as follows: (1) compared with the prior art, the utility model improves and innovates the connection structure between the movable end conductive bar and the movable conductive bar, preferably adopts a connection mode of combining axial plug-in connection with the conductive contact finger, and realizes the coaxial sliding electric connection structure of the movable conductive bar and the movable end conductive bar. (2) The conductive contact finger adopts a double-layer structure, so that the current bearing area is well increased, the conductive effect is better, and the electric heating is lower. (3) The conductive dynamic connection structure is simple, novel and reasonable, occupies smaller space, has more stable structure, greatly reduces the cost under the same specification, greatly prolongs the service life and is more suitable for high-speed switch and high-current on-off occasions.
Drawings
FIG. 1 is a schematic diagram of a prior art conductive loop of a fast switch;
FIG. 2 is a schematic cross-sectional view of the high-current conductive connection structure of the present utility model applied to a fast switch;
FIG. 3 is an enlarged schematic view of the portion A shown in FIG. 2;
FIG. 4 is a schematic view of a portion of the structure of portion A of FIG. 3 (with the conductive fingers removed);
fig. 5 is a schematic diagram of a conductive loop of the high-current conductive connection structure of the present utility model when applied to a fast switch.
The following description is made with reference to the accompanying drawings:
10. a moving end assembly; 100. a movable conductive rod; 101. a moving contact; 11. a movable end conductive bar; 12. a first connection portion; 120. a boss; 121. a ring groove A; 1210. a ring groove B; 122. perforating A; 13. a second connecting portion; 130. a ring groove C; 131. perforating B; 14. conductive contact fingers; 2. an insulating housing; 3. a vacuum arc extinguishing chamber; 40. a stationary end assembly; 400. a static conductive rod; 401. a stationary contact; 41. static end conducting bars; 5. and a flexible connecting wire.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Example 1:
referring to fig. 2 to 5, the present utility model provides a high current conductive connection structure for a fast switch. The quick switch comprises an insulating shell 2, a vacuum arc-extinguishing chamber 3, a conductive static connection structure and a conductive dynamic connection structure, wherein the vacuum arc-extinguishing chamber 3 is arranged in the insulating shell 2; the conductive static connection structure has a static end assembly 40 and a static end conductive bar 41, the static end assembly 40 has a static conductive bar 400 and a static contact 401 fixedly connected to the lower end of the static conductive bar 400 (the "up" and "down" directions are defined by the vertical placement state of the fast switch in this embodiment, the lower end of the static conductive bar 400 is placed in the vacuum arc-extinguishing chamber 3 together with the static contact 401, the upper end of the static conductive bar 400 is sealed to extend out of the vacuum arc-extinguishing chamber 3, and the upper end of the static conductive bar 400 is also connected to the top wall of the insulating housing 2 together with the static end conductive bar 41 by screw locking, one side or two opposite sides of the static end conductive bar 41 is sealed to extend out of the insulating housing 2 and is simultaneously fixedly connected with the insulating housing 2, namely: the static end conductive bar 41 can be designed into a single-side lead-out design or a double-side lead-out design; the conductive movable connection structure comprises a movable end assembly 10 and a movable end conductive bar 11, the movable end assembly 10 is provided with a movable conductive rod 100 and a movable contact 101 fixedly connected to the upper end of the movable conductive rod 100, the upper end of the movable conductive rod 100 and the movable contact 101 are also arranged in the vacuum arc-extinguishing chamber 3 together, the movable contact 101 and the fixed contact 401 are arranged in a vertically opposite mode, the lower end of the movable conductive rod 100 extends out of the vacuum arc-extinguishing chamber 3 in a sealing mode and is arranged in the insulating shell 2 at the same time, and the lower end of the movable conductive rod 100 is also connected with the movable end conductive bar 11. Unlike the prior art, the utility model innovates the connection structure between the lower end of the movable conductive rod 100 and the movable conductive row 11, and adopts the following structural design: the movable end conductive bar 11 is provided with a first connection portion 12 (which is arranged in the insulating housing 2), the movable conductive bar 100 is located above the movable end conductive bar 11, the lower end of the movable conductive bar 100 is provided with a second connection portion 13 (which is also arranged in the insulating housing 2) in plug-in fit with the first connection portion 12, and the second connection portion 13 and the first connection portion 12 are respectively provided with a conductive contact finger 14, so that when the second connection portion 13 is inserted onto the first connection portion 12, the second connection portion 13 can also be in sliding electrical connection with the first connection portion 12.
It can be seen from the above description that, unlike the existing method of connecting the movable end and the movable end conductive bar of the vacuum arc-extinguishing chamber by using the flexible connection wire, the present utility model adopts the connection mode of combining axial plugging and conductive contact fingers to realize the coaxial sliding electrical connection of the movable conductive bar and the movable end conductive bar, and the connection structure not only avoids the influence of the electric repulsive force between the busbar on the stability of the conductive movable connection structure (because in the connection structure, all the electric repulsive force only exists between the movable conductive bar and the static conductive bar, the internal force between the two acts on the insulating housing 2, so that the influence on the force of the contact in the vacuum arc-extinguishing chamber is not existed), but also reduces the movable quality of the circuit breaker and improves the switching-on and switching-off speed of the vacuum arc-extinguishing chamber. In addition, the conductive contact finger in the utility model adopts a double-layer structure (respectively arranged on the second connecting part 13 and the first connecting part 12), which well increases the current bearing area, so that the conductive effect is better and the electric heating is lower.
The specific structures of the first connecting portion 12 and the second connecting portion 13 are described in detail below.
Preferably, as shown in fig. 3 and fig. 4, the first connecting portion 12 has a boss 120 protruding on the upper surface of the movable end conductive bar 11, and a ring groove a121 concavely disposed on the boss 120 and having an upward opening, the second connecting portion 13 has a concave groove structure concavely disposed on the lower end of the movable conductive bar 100 and having a downward opening, and the second connecting portion 13 is in plug-in fit with the ring groove a121, specifically, a side wall of the second connecting portion 13 is in a concave-convex plug-in fit relationship with the ring groove a 121; in addition, the second connection portion 13 and the inner side wall of the ring groove a121 are respectively provided with the conductive contact finger 14.
Further preferably, the movable conductive rod 100, the second connection portion 13 and the ring groove a121 are arranged concentrically.
Further preferably, the first connection portion 12 is integrally formed with the movable end conductive bar 11. The first connection portion 12 may be disposed on an upper surface of one side of the movable end conductive bar 11, and then the other side of the movable end conductive bar 11 extends out of the insulating housing 2 in a sealing manner and is fixedly connected with the insulating housing 2 at the same time, that is: at this time, the movable end conducting bar 11 is of a single-side leading-out design; alternatively, the first connection portion 12 may be disposed on the upper surface of the middle portion of the movable end conductive strip 11, and then, two opposite sides of the movable end conductive strip 11 respectively extend out of the insulating housing 2 in a sealing manner, and are fixedly connected with the insulating housing 2 at the same time, that is: at this time, the movable terminal conductive bar 11 is designed to be a double-sided lead-out.
Further preferably, the ring groove a121 may be designed in one or more rings (not shown in the structural drawings, but easily understood), specifically according to the size of the through-flow; when the ring groove A121 is designed into a plurality of rings, the ring groove A121 is sleeved in sequence, and the ring grooves A121 and the movable conducting rod 100 are arranged in the same central line; correspondingly, the number of the second connecting portions 13 is also plural, and the plurality of the second connecting portions 13 are also sequentially sleeved and arranged at the same center line with the movable conductive rod 100, so as to realize that the plurality of the second connecting portions 13 are correspondingly inserted into the ring grooves a121 in multiple circles.
Further preferably, the specific structure for disposing the conductive contact finger 14 on the inner side wall of the ring groove a121 is as follows: the inner side wall of the ring groove a121 is concavely provided with a ring groove B1210, the conductive contact finger 14 is installed in the ring groove B1210, and meanwhile, the ring groove B1210 can limit the conductive contact finger 14 located therein up and down, and the conductive contact finger 14 installed in the ring groove B1210 is also abutted against the outer side wall of the second connecting portion 13.
The specific structure for disposing the conductive contact finger 14 on the inner sidewall of the second connection portion 13 is as follows: the inner side wall of the second connecting portion 13 is concavely provided with a ring groove C130, the conductive contact finger 14 is installed in the ring groove C130, meanwhile, the ring groove C130 can limit the conductive contact finger 14 located therein up and down, and the conductive contact finger 14 installed in the ring groove C130 is also abutted against the inner side wall of the ring groove a 121.
Description: the number of turns of the ring groove B1210 and the ring groove C130 is not limited, and the utility model is specifically designed according to the through flow.
Still further preferably, in this embodiment, the conductive contact fingers 14 located on the inner side wall of the ring groove a121 and the conductive contact fingers 14 located on the inner side wall of the second connecting portion 13 are arranged in a staggered manner.
Still further preferably, in this embodiment, a through hole a122 is further centrally disposed on the boss 120 (the ring groove a121 surrounds the outside of the through hole a 122), and a through hole B131 is centrally disposed on the top wall of the second connecting portion 13, where the through hole a122 and the through hole B131 are respectively disposed on the same center line as the movable conductive rod 100, and are respectively used for the operation rod of the quick switch to pass through.
In addition, in the present embodiment, the movable conductive rod 100 has a solid or hollow structure, and may be specifically set according to the size of the through-flow; the conductive contact finger 14 is a watchband contact finger.
In summary, the conductive movable connection structure disclosed by the utility model not only avoids the influence of the electric repulsive force between the busbar on the stability of the conductive movable connection structure, but also reduces the moving quality of the circuit breaker and improves the switching-on and switching-off speed of the vacuum arc extinguishing chamber; the structure is simple, novel and reasonable, the conductive effect is good, the electric heating is low, the occupied space is small, the cost is low, the service life is long, and the electric heating switch is more suitable for high-speed switch and high-current on-off occasions.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The foregoing description is only of a preferred embodiment of the utility model, which can be practiced in many other ways than as described herein, so that the utility model is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model without departing from the technical solution of the present utility model still falls within the scope of the technical solution of the present utility model.
Claims (10)
1. The large-current conductive dynamic connection structure for the quick switch comprises a dynamic end assembly (10) and a dynamic end conductive bar (11), wherein the dynamic end assembly (10) is provided with a dynamic conductive rod (100) and a dynamic contact (101) fixedly connected to one end of the dynamic conductive rod (100), and the dynamic end conductive bar (11) is connected with the dynamic conductive rod (100); the method is characterized in that: be equipped with first connecting portion (12) on moving end conducting bar (11), be equipped with on moving conducting rod (100) the other end with first connecting portion (12) looks grafting complex second connecting portion (13), and second connecting portion (13) with still be equipped with electrically conductive contact finger (14) respectively on first connecting portion (12), so that second connecting portion (13) cartridge in on first connecting portion (12), second connecting portion (13) can also with first connecting portion (12) keep sliding electric connection.
2. The high-current conductive dynamic connection structure for a fast switch as claimed in claim 1, wherein: the movable conducting rod (100) and the movable end conducting bar (11) are arranged up and down by taking the vertical placement state of the quick switch as a reference;
the first connecting portion (12) is provided with a boss (120) protruding on the upper surface of the movable end conducting bar (11) and a ring groove A (121) concavely arranged on the boss (120) and provided with an upward opening, the second connecting portion (13) is of a groove structure concavely arranged on the lower end of the movable conducting rod (100) and provided with a downward opening, the second connecting portion (13) is matched with the ring groove A (121) in a plugging manner, and the second connecting portion (13) and the inner side wall of the ring groove A (121) are respectively provided with a conductive contact finger (14).
3. The high-current conductive dynamic connection structure for a fast switch as claimed in claim 2, wherein: the movable conducting rod (100), the second connecting part (13) and the annular groove A (121) are arranged in the same central line.
4. A high current conductive dynamic connection structure for a fast switch as claimed in claim 3, wherein: the ring groove A (121) is one or more circles;
when the ring groove A (121) is formed in multiple circles, the ring groove A (121) is sleeved in sequence, and the ring grooves A (121) and the movable conductive rod (100) are arranged in the same central line; correspondingly, the number of the second connecting parts (13) is also multiple, and the second connecting parts (13) are also sleeved in sequence and are arranged at the same center line with the movable conducting rod (100), so that the second connecting parts (13) are correspondingly inserted into the ring grooves A (121) for multiple times.
5. The high-current conductive dynamic connection structure for a fast switch as claimed in claim 2, wherein: an annular groove B (1210) is concavely arranged on the inner side wall of the annular groove A (121), the conductive contact finger (14) is arranged in the annular groove B (1210), and the conductive contact finger (14) arranged in the annular groove B (1210) is also abutted against the outer side wall of the second connecting part (13).
6. The high-current conductive dynamic connection structure for a fast switch as claimed in claim 2, wherein: an annular groove C (130) is concavely arranged on the inner side wall of the second connecting part (13), the conductive contact finger (14) is arranged in the annular groove C (130), and meanwhile the conductive contact finger (14) arranged in the annular groove C (130) is also abutted against the inner side wall of the annular groove A (121).
7. The high-current conductive dynamic connection structure for a fast switch as claimed in claim 2, wherein: the conductive contact fingers (14) positioned on the inner side wall of the annular groove A (121) and the conductive contact fingers (14) positioned on the inner side wall of the second connecting part (13) are arranged in a vertically staggered mode.
8. The high-current conductive dynamic connection structure for a fast switch as claimed in claim 2, wherein: the boss (120) is provided with a perforation A (122) in the middle, the top wall of the second connecting part (13) is provided with a perforation B (131) in the middle, and the perforation A (122) and the perforation B (131) are respectively arranged with the movable conducting rod (100) in the same center line and are respectively used for the operation rod of the quick switch to pass through.
9. The high-current conductive dynamic connection structure for a fast switch as claimed in claim 1, wherein: the movable conducting rod (100) is of a solid or hollow structure; the conductive contact finger (14) adopts a watchband contact finger.
10. The high-current conductive dynamic connection structure for a fast switch as claimed in claim 2, wherein: the fast switch also comprises an insulating shell (2) and a vacuum arc-extinguishing chamber (3) which is arranged in the insulating shell (2);
the upper end of the movable conducting rod (100) and the movable contact (101) on the movable conducting rod are both arranged in the vacuum arc extinguishing chamber (3), and the lower end of the movable conducting rod (100) and the second connecting part (13) on the movable conducting rod are both arranged outside the vacuum arc extinguishing chamber (3) and are simultaneously arranged in the insulating shell (2);
one side of the movable end conducting bar (11) and the first connecting part (12) on the movable end conducting bar are both arranged in the insulating shell (2), and the other side of the movable end conducting bar (11) extends out of the insulating shell (2) in a sealing way and is fixedly connected with the insulating shell (2) at the same time; or the middle part of the movable end conducting bar (11) and the first connecting part (12) on the movable end conducting bar are both arranged in the insulating shell (2), and the opposite sides of the movable end conducting bar (11) are respectively and hermetically extended out of the insulating shell (2) and are fixedly connected with the insulating shell (2) at the same time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320620735.9U CN219610301U (en) | 2023-03-27 | 2023-03-27 | High-current conductive dynamic connection structure for fast switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320620735.9U CN219610301U (en) | 2023-03-27 | 2023-03-27 | High-current conductive dynamic connection structure for fast switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219610301U true CN219610301U (en) | 2023-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320620735.9U Active CN219610301U (en) | 2023-03-27 | 2023-03-27 | High-current conductive dynamic connection structure for fast switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219610301U (en) |
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2023
- 2023-03-27 CN CN202320620735.9U patent/CN219610301U/en active Active
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