CN210628181U

CN210628181U - Integrated isolation vacuum circuit breaker

Info

Publication number: CN210628181U
Application number: CN201922034708.XU
Authority: CN
Inventors: 郭国领; 李继龙; 王志超
Original assignee: Henan Lingzhi Electric Co Ltd
Current assignee: Henan Lingzhi Electric Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-05-26
Anticipated expiration: 2029-11-22

Abstract

The utility model discloses an integrated isolation vacuum circuit breaker, which comprises a vacuum arc-extinguishing chamber component, a brake-separating spring component, a sliding contact finger component and a conducting rod component; the vacuum arc extinguish chamber component comprises a shielding electrode, a shielding ring, a porcelain bushing, a silica gel envelope, a movable end shielding electrode, a static contact and a movable contact; the opening spring assembly comprises an opening spring, a shaft sleeve and a first retainer ring which are sequentially sleeved at one end of the moving contact; the sliding contact finger assembly comprises a guide ring, a cushion pad, a sliding ring, an over travel spring, a shifting ring, a connecting lever connecting piece, a baffle card, a second baffle ring, a contact finger spring and a sliding contact finger; the conducting rod assembly comprises a guide sleeve and a conducting rod. The utility model has the advantages of simple structure, high reliability, small volume, low cost, safety, reliability and environmental protection.

Description

Integrated isolation vacuum circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field among the power transmission and distribution equipment, concretely relates to vacuum circuit breaker is kept apart in integration.

Background

In power transmission and distribution equipment, a circuit breaker (also called a load switch) has the function of protecting the safety of electric equipment, and a disconnecting switch has the function of protecting the safety of human bodies. In the past, the two devices are independent devices, and a linkage device must be added between the two devices to ensure the operation safety. In order to simplify the structure and the operation, a disconnecting switch and a circuit breaker (or a load switch) are integrally designed, and a disconnecting circuit breaker (or a disconnecting load switch) is born.

At present, in medium voltage distribution networks, in particular outdoor distribution networks, isolating circuit breakers have been used in large numbers. In China, typical products comprise a ZW32 type on-column vacuum circuit breaker with an external isolating switch, a ZW28 type on-column vacuum load switch with an internal isolating switch and the like. The isolating switch of the product is a rotary structure, the occupied space is large, the circuit breaker and the isolating switch are respectively driven by two main shafts of two operating mechanisms, and an interlocking mechanism must be arranged between the two operating mechanisms, so the structure is quite complicated.

The recently developed disconnecting circuit breaker is also driven by one main shaft by one operating mechanism, and the mechanical structure is relatively simple. However, the products including the above ZW32 and ZW28, which use epoxy resin as basic insulation support, not only have high cost, but also the environmental pollution of epoxy resin during manufacture and after use is not underestimated. In particular, in products such as ZW28 type, sulfur hexafluoride is used as main insulation between built-in isolation fractures, which is not environment-friendly, and epoxy resin support is difficult to avoid 'false fracture' and may affect the safety and reliability of isolation performance.

SUMMERY OF THE UTILITY MODEL

The utility model provides a simple structure, high reliability, small, the low integration isolation vacuum circuit breaker of cost for solving the not enough of prior art.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an integrated isolation vacuum circuit breaker comprises a vacuum arc extinguishing chamber assembly, a brake separating spring assembly, a sliding contact finger assembly and a conductive rod assembly, wherein the vacuum arc extinguishing chamber assembly is provided with a fixed contact and a moving contact.

The opening spring assembly comprises an opening spring, a shaft sleeve and a first retaining ring which are sequentially sleeved at one end of the moving contact, and the first retaining ring is fixed at one end of the moving contact and used for limiting the position of the shaft sleeve.

The sliding contact finger assembly comprises a sliding ring, sliding contact fingers are arranged at two ends of the sliding ring, and an over-travel spring is arranged on the outer wall of the sliding ring between the two sliding contact fingers; one end of the over travel spring is fixed with the outer wall of the slip ring, and the other end of the over travel spring is provided with a shifting ring capable of sliding on the slip ring; a second retaining ring is further arranged on one side, away from the over travel spring, of the shifting ring, and the second retaining ring is fixed with the outer wall of the sliding ring; the slip ring is of a tubular structure, and an inner flange is arranged on the inner wall of the slip ring.

The conducting rod assembly is inserted into the sliding ring, and the sliding contact finger assembly can slide at the end part of the conducting rod assembly along the length direction of the conducting rod assembly.

Furthermore, the conducting rod assembly comprises a conducting rod and a guide sleeve arranged at one end of the conducting rod; the conducting rod is arranged on one side of the moving contact far away from the static contact and is coaxial with the moving contact.

Furthermore, a contact finger spring is wound on the outer side of the sliding contact finger.

Furthermore, a through hole for the moving contact to pass through is formed in the middle of the shaft sleeve, a blocking ring with the outer diameter larger than that of the opening spring is arranged on the outer side surface of the shaft sleeve, and one end of the opening spring is sleeved on the outer side of the shaft sleeve and is in contact with the blocking ring.

Furthermore, an outer flange used for fixing the over travel spring is arranged on the outer wall of the slip ring, and one end, far away from the shifting ring, of the over travel spring is in contact with the outer flange.

Furthermore, one end of the slip ring, which is far away from the conductive rod inserted component, is provided with a guide ring on the inner wall of the slip ring, and the inner diameter of the guide ring is matched with the end part of the movable contact.

Further, a gasket is arranged between the opening spring and the vacuum arc extinguishing chamber assembly.

Furthermore, cushion pads are arranged on two end faces of the inner flange.

Furthermore, both ends of the shifting ring are provided with crank arm connecting pieces.

Furthermore, an insulating sleeve is fixed on the shifting ring.

Has the advantages that: the utility model provides an integration isolation vacuum circuit breaker, only pass through the operation of drive connecting lever connecting piece with a main shaft of an operating mechanism, simple structure not only, the reliability is high, and is small, the cost is low, and the insulating support of outdoor product can adopt the porcelain matter that insulating properties can self-resuming to be insulating moreover, indoor product can reduce organic insulating support's quantity to minimumly, can adopt the environmental protection insulating gas of ordinary pressure dry air or non-sulfur hexafluoride as the edge and keep apart the main insulation of fracture, no "false fracture" phenomenon, safe and reliable more, green.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a structural view of embodiment 1 of the present invention;

FIG. 2 is a block diagram of an arc chute assembly of example 1;

FIG. 3 is a structural view of a brake opening spring assembly in embodiment 1;

fig. 4 is a structural view of the movable contact assembly in embodiment 1;

FIG. 5 is a structural view of a dial ring in embodiment 1;

FIG. 6 is a structural view of the conductive rod assembly in embodiment 1;

fig. 7 is a schematic view of a closing state in embodiment 1;

FIG. 8 is a schematic view showing an open state in embodiment 1;

FIG. 9 is a structural view of a sleeve in embodiment 1

FIG. 10 is a schematic view of the embodiment 1 when used in a pole switch;

fig. 11 is a schematic view of the embodiment 1 when applied to a ring main unit;

fig. 12 is a structural view of the closing state in embodiment 2;

fig. 13 is a structural view of embodiment 2 in the open state.

The reference numerals are explained below:

in the figure: 1. a vacuum arc extinguishing chamber assembly; 2. a brake-separating spring component; 3. a sliding finger assembly; 4. a conductive rod assembly; 5. a shield electrode; 6. static contact; 7. a shield ring; 8. a porcelain bushing; 9. encapsulating by silica gel; 10. a moving contact; 11. a moving end shielding electrode; 12. a gasket; 13. a brake separating spring; 14. a shaft sleeve; 141. a through hole; 142. a baffle ring; 15. a first retainer ring; 16. a guide ring; 17. a cushion pad; 18. a slip ring; 181. an inner flange; 182. an outer flange; 19. an over travel spring; 20. ring shifting; 21. a crank arm connecting piece; 22. blocking the card; 23. a second retainer ring; 24. a finger spring; 25. a sliding contact finger; 26. a guide sleeve; 27. a conductive rod; 28. a crank arm; 29. a main shaft; 30. and an insulating sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

Referring to fig. 1 to 11, the present invention provides an integrated isolated vacuum circuit breaker, which includes a vacuum interrupter chamber assembly 1, a tripping spring assembly 2, a sliding contact finger assembly 3, and a conductive rod assembly 4.

The vacuum arc extinguish chamber component 1 comprises a shielding electrode 5, a shielding ring 7, a porcelain bushing 8, a silica gel envelope 9, a movable end shielding electrode 11, a static contact 6 and a movable contact 10; the porcelain bushing 8 is arranged on the periphery of the static contact 6 and the moving contact 10, one end of the porcelain bushing is connected with the static contact 6 through the shielding electrode 5, and the other end of the porcelain bushing is connected with the moving contact 10 through the moving end shielding electrode 11; the shielding ring 7 is fixed with the inner wall of the porcelain sleeve 8, and the silica gel envelope 9 is coated on the outer sides of the shielding electrode 5, the porcelain sleeve 8 and the movable end shielding electrode 11. The vacuum arc-extinguishing chamber component 1 in the utility model can also be other existing arc-extinguishing chamber structures or products, wherein the static contact 6 and the moving contact 10 are also common parts in the arc-extinguishing chamber.

The opening spring assembly 2 comprises an opening spring 13, a shaft sleeve 14 and a first retainer ring 15 which are sequentially sleeved at one end of the movable contact 10, and the first retainer ring 15 is fixed at one end of the movable contact 10 and used for limiting the position of the shaft sleeve 14.

The sliding contact finger assembly 3 comprises a sliding ring 18, sliding contact fingers 25 are arranged at two ends of the sliding ring 18, and a contact finger spring 24 is wound on the outer sides of the sliding contact fingers 25; the sliding ring 18 is of a tubular structure, and an inner flange 181 and an outer flange 182 are respectively arranged on the inner wall and the outer wall of the left end of the sliding ring 18; an overtravel spring 19 is arranged on the outer wall of the slip ring 18 between the two sliding contact fingers 25, one end of the overtravel spring 19 is fixed with the end face of the outer flange 182, a shifting ring 20 is arranged on the right side of the overtravel spring 19, and the shifting ring 20 can slide on the slip ring 18 to compress the overtravel spring 19; both ends of the shifting ring 20 are provided with crank arm connecting pieces 21, the right side of the shifting ring 20 is provided with a second retaining ring 23 used for limiting the over travel spring 19, and the second retaining ring 23 is fixed with the outer wall of the sliding ring 18; the inner wall of the left end of the sliding ring 18 is provided with a guide ring 16, and the inner diameter of the guide ring 16 is adapted to the end part of the movable contact 10. The structure of the dial ring 20 is shown in fig. 5, and a cylindrical mounting block for mounting the crank arm connector 21 is arranged on the outer wall of the dial ring 20. One end of the crank arm connecting piece 21 is connected with a crank arm 28 in the column switch or the ring main unit, the crank arm 28 is installed on a main shaft 29 of the column switch or the ring main unit, and the main shaft 29 drives the crank arm 28 to rotate so as to drive the shifting ring 20 to move on the sliding ring 18.

The conducting rod assembly 4 comprises a conducting rod 27 and a guide sleeve 26 arranged at one end of the conducting rod 27; the conducting rod 27 is arranged on one side of the movable contact 10 far away from the fixed contact 6, and is coaxial with the movable contact 10; the conductor bar assembly 4 is inserted into the interior of the slip ring 18 and the sliding contact finger assembly 3 is slidable along the length of the conductor bar assembly 4 at the end of the conductor bar assembly 4.

The utility model discloses in, the middle part of axle sleeve 14 is provided with the through-hole 141 that is used for moving contact 10 to pass, is provided with the fender ring 142 that the external diameter is greater than the separating brake spring 13 external diameter on axle sleeve 14's the lateral surface, and a pot head of separating brake spring 13 is established in axle sleeve 14's the outside and with keep off ring 142 contact.

In order to reduce the wearing and tearing between separating brake spring 13 and the vacuum interrupter subassembly 1, the utility model discloses be provided with packing ring 12 between well separating brake spring 13 and the vacuum interrupter subassembly 1. In order to avoid the hard collision when the slip ring 18 contacts the movable contact 10 or the conducting rod 27 and ensure the stability of the device, cushions 17 are arranged on both end faces of the inner flange 181.

In specific implementation, the structure of the sliding contact finger 25 may be in the form of a plum-blossom contact finger, a watch band contact finger, an oval contact finger spring, or a chrome copper self-force contact finger, and the crank arm connecting piece 21 may be fixed by the stop clips 22 installed at both ends of the dial ring 20.

Fig. 10 shows the application of the present invention to the pole switch, and fig. 11 shows the application of the present invention to the ring main unit.

Closing process of embodiment 1: referring to fig. 1, the crank arm connecting member 21 drives the sliding contact finger assembly 3 to move leftwards along the conductive rod 27, the sliding contact finger 25 at the left end of the sliding contact finger assembly 3 is in contact with the movable contact 10 on the vacuum interrupter chamber assembly 1, and the contact finger spring 24 realizes reliable contact between the movable contact 10 and the sliding contact finger 25. The isolating switch realizes reliable switch-on, the sliding contact finger assembly 3 continues to drive the moving contact 10 leftwards, the moving contact 10 and the static contact 6 are contacted after arc extinction in the vacuum arc extinguishing chamber assembly 1 by compressing the switch-off spring 13 through the shaft sleeve 14, the crank arm connecting piece 21 compresses the over-travel spring 19 through the sliding ring 18, and the over-travel spring 19 compresses the moving contact 10 and the static contact 6 to realize reliable contact. So far, the disconnecting circuit breaker realizes closing, and the opening spring 13 realizes energy storage, and prepares for opening, and the closing state is shown in fig. 7.

Opening procedure of example 1: referring to fig. 1, the main shaft 29 and the crank arm 28 drive the crank arm connecting piece 21 to drive the sliding contact finger assembly 3 to slide rightwards on the conducting rod assembly 4, the opening spring 13 releases spring energy to drive the moving contact 10 and the static contact 6 to be separated, and the sliding contact finger 25 at the left end and the moving contact 10 are ensured to be reliably contacted when the moving contact 10 and the static contact 6 are separated in place. The sliding contact finger assembly 3 continues to slide rightwards, the sliding contact finger 25 at the left end is separated from the moving contact 10, and the separating spring 13 pushes the shaft sleeve 14 to ensure that the moving contact 10 is separated in place. After the sliding contact finger assembly 3 is in place, the sliding contact finger 25 at the left end and the movable contact 10 keep a safe distance, and the state after the brake is separated is shown in fig. 8.

Example 2

The difference between this embodiment and embodiment 1 is that in this embodiment, the insulating sleeve 30 is used to replace the crank arm connecting piece 21 in embodiment 1, the operating mechanism operates the insulating sleeve 30 to make a linear motion along the conducting rod 27, and the driving form is changed from the rotary motion of the crank arm 28 to the linear motion of the insulating sleeve 30; the insulating sleeve 30 is a hollow tubular structure, and is sleeved outside the conducting rod 27, and one end of the insulating sleeve is fixed with the shifting ring 20.

Closing process of embodiment 2: the operating mechanism pushes the insulating sleeve 30 to move linearly, and then the insulating sleeve 30 pushes the sliding contact finger assembly 3 to move leftwards along the conducting rod 27, the sliding contact finger 25 at the left end of the sliding contact finger assembly 3 is contacted with the movable contact 10 on the vacuum arc extinguishing chamber assembly 1, and the contact finger spring 24 realizes the reliable contact of the movable contact 10 and the sliding contact finger 25. The isolating switch realizes reliable switch-on, the sliding contact finger assembly 3 continues to drive the moving contact 10 leftwards, the moving contact 10 and the static contact 6 are contacted after arc extinction in the vacuum arc extinguishing chamber assembly 1 by compressing the switch-off spring 13 through the shaft sleeve 14, the crank arm connecting piece 21 compresses the over-travel spring 19 through the sliding ring 18, and the over-travel spring 19 compresses the moving contact 10 and the static contact 6 to realize reliable contact. So far, the disconnecting circuit breaker realizes closing, and the opening spring 13 realizes energy storage, and prepares for opening, and the closing state is shown in fig. 12.

Opening procedure of example 2: the operating mechanism drives the insulating sleeve 30 to push the sliding contact finger assembly 3 to slide rightwards on the conducting rod assembly 4, the opening spring 13 releases spring energy to drive the moving contact 10 and the static contact 6 to be separated, and the sliding contact finger 25 at the left end and the moving contact 10 are ensured to be reliably contacted when the moving contact 10 and the static contact 6 are separated in place. The sliding contact finger assembly 3 continues to slide rightwards, the sliding contact finger 25 at the left end is separated from the moving contact 10, and the separating spring 13 pushes the shaft sleeve 14 to ensure that the moving contact 10 is separated in place. After the sliding contact finger assembly 3 is in place, the sliding contact finger 25 at the left end keeps a safe distance from the movable contact 10, and the state after the opening is finished is shown in fig. 13.

The utility model provides an integration isolation vacuum circuit breaker, only use a main shaft 29 to operate vacuum circuit breaker divide-shut brake through drive connecting lever connecting piece 21 or insulating cover 30, simple structure not only, the reliability is high, and is small, the cost is low, and the insulating support of outdoor product can adopt the porcelain matter that insulating properties can be from recovering to be insulating, indoor product can reduce organic insulating support's quantity to minimumly, can adopt the environmental protection insulating gas of ordinary pressure dry air or non-sulfur hexafluoride as the edge and keep apart the main insulation of fracture, no "false fracture" phenomenon, safety and reliability more, green.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An integrated isolation vacuum circuit breaker comprises a vacuum arc-extinguishing chamber component (1) provided with a fixed contact (6) and a movable contact (10), and is characterized by also comprising a brake-separating spring component (2), a sliding contact finger component (3) and a conductive rod component (4);

the opening spring assembly (2) comprises an opening spring (13), a shaft sleeve (14) and a first retainer ring (15) which are sequentially sleeved at one end of the movable contact (10), and the first retainer ring (15) is fixed at one end of the movable contact (10) and used for limiting the position of the shaft sleeve (14);

the sliding contact finger assembly (3) comprises a sliding ring (18), sliding contact fingers (25) are arranged at two ends of the sliding ring (18), and an overtravel spring (19) is arranged on the outer wall of the sliding ring (18) between the two sliding contact fingers (25); one end of the over travel spring (19) is fixed with the outer wall of the sliding ring (18), and the other end of the over travel spring is provided with a shifting ring (20) which can slide on the sliding ring (18); a second retaining ring (23) is further arranged on one side, away from the over travel spring (19), of the shifting ring (20), and the second retaining ring (23) is fixed with the outer wall of the sliding ring (18); the slip ring (18) is of a tubular structure, and an inner flange (181) is arranged on the inner wall of the slip ring;

the conducting rod assembly (4) is inserted into the sliding ring (18), and the sliding contact finger assembly (3) can slide along the length direction of the conducting rod assembly (4) at the end part of the conducting rod assembly (4).

2. The integrated isolating vacuum circuit breaker according to claim 1, characterized in that: the conducting rod component (4) comprises a conducting rod (27) and a guide sleeve (26) arranged at one end of the conducting rod (27); the conducting rod (27) is arranged on one side of the moving contact (10) far away from the static contact (6) and is coaxial with the moving contact (10).

3. The integrated isolating vacuum circuit breaker according to claim 1, characterized in that: and a contact finger spring (24) is wound on the outer side of the sliding contact finger (25).

4. The integrated isolating vacuum circuit breaker according to claim 1, characterized in that: the middle part of the shaft sleeve (14) is provided with a through hole (141) for the moving contact (10) to pass through, the outer side surface of the shaft sleeve (14) is provided with a baffle ring (142) with the outer diameter larger than that of the opening spring (13), and one end of the opening spring (13) is sleeved on the outer side of the shaft sleeve (14) and is in contact with the baffle ring (142).

5. The integrated isolating vacuum circuit breaker according to claim 1, characterized in that: an outer flange (182) used for fixing the over travel spring (19) is arranged on the outer wall of the slip ring (18), and one end, far away from the shifting ring (20), of the over travel spring (19) is in contact with the outer flange (182).

6. The integrated isolating vacuum circuit breaker according to claim 1, characterized in that: the end of the slip ring (18) far away from the inserted conducting bar component (4) is provided with a guide ring (16) on the inner wall, and the inner diameter of the guide ring (16) is adapted to the end part of the movable contact (10).

7. The integrated isolating vacuum circuit breaker according to claim 1, characterized in that: and a gasket (12) is arranged between the opening spring (13) and the vacuum arc-extinguishing chamber component (1).

8. The integrated isolating vacuum circuit breaker according to any one of claims 1 to 7, characterized in that: and cushion pads (17) are arranged on two end faces of the inner flange (181).

9. The integrated isolating vacuum circuit breaker according to claim 8, characterized in that: and crank arm connecting pieces (21) are arranged at the two ends of the shifting ring (20).

10. The integrated isolating vacuum circuit breaker according to claim 8, characterized in that: an insulating sleeve (30) is fixed on the shifting ring (20).