Arc uniformly-distributed electrode structure of vacuum arc-extinguishing chamber

Abstract

The utility model discloses a vacuum arc-extinguishing chamber arc uniform distribution type electrode structure, which comprises a cup seat, and a contact blade and a conducting rod which are arranged at the upper end and the lower end of the cup seat, a connecting sleeve is sleeved on the conducting rod, the connecting sleeve is in threaded connection with the conducting rod, the upper end of the connecting sleeve is fixedly connected with the lower end of the cup seat, and the lower end of the connecting sleeve is fixedly connected with the cup seat. A storage groove is formed in the upper end of the cup base, a supporting block is slidably connected to the inner side wall of the storage groove, the upper end of the supporting block penetrates through the storage groove and abuts against the lower end of the contact piece, and a second spring is fixedly connected between the lower end of the supporting block and the inner bottom of the storage groove; the lower end of the contact blade is fixedly connected with a plurality of fixing rods distributed in an annular mode, the upper end of the cup base is provided with inserting grooves corresponding to the fixing rods, and the inner side wall of each inserting groove is provided with a sliding groove. According to the utility model, through the arrangement of the fixing rod, the support block and other mechanisms, the contact blade and the conducting rod can be quickly assembled and fixed with the cup base, and the assembly efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum interrupters, and particularly relates to an electrode structure with evenly distributed arcs in a vacuum interrupter. Background Art

[0002] A vacuum interrupter is a key component used in high-voltage switchgear. Its main function is to quickly and safely extinguish arcs in a circuit breaker or other switching devices. The electrode structure with evenly distributed arcs is a design in the vacuum interrupter, aiming to optimize the arc extinguishing process, reduce electrode damage, and improve the reliability and lifespan of the switching device.

[0003] The existing utility model patent with the application number: CN200420070540.9 proposed an electrode structure with evenly distributed arcs in a vacuum interrupter, including a cup base, with inclined grooves provided on the side wall of the cup base, and radial grooves corresponding to the inclined grooves provided on the contact piece...

[0004] Although the comparative document has the following advantages: it can effectively suppress the eddy current generated by alternating current, significantly enhance the magnetron ability for vacuum arcs, enable the arcs to burn evenly on the entire electrode surface, with high effective utilization rate of the electrode, and can significantly improve the breaking capacity of the vacuum interrupter; however, since both the contact piece and the conducting rod are assembled and fixed to the cup base by brazing, during mass production, the welding operation is cumbersome and the assembly efficiency is low. Summary of the Utility Model

[0005] The purpose of the present utility model is to solve the problems raised in the above background art, and to propose an electrode structure with evenly distributed arcs in a vacuum interrupter.

[0006] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A vacuum interrupter arc evenly distributed electrode structure, comprising a cup seat and contact pieces and conductive rods arranged at the upper and lower ends thereof. A connecting sleeve is sleeved on the conductive rod, and the connecting sleeve is threadedly connected to the conductive rod. The upper end of the connecting sleeve is fixedly connected to the lower end of the cup seat. The upper end of the cup seat is provided with a placing groove. A support block is slidably connected to the inner side wall of the placing groove. The upper end of the support block penetrates through the placing groove and abuts against the lower end of the contact piece. A second spring is fixedly connected between the lower end of the support block and the inner bottom of the placing groove. The lower end of the contact piece is fixedly connected with a plurality of fixing rods distributed in a ring shape. The upper end of the cup seat is provided with a slot corresponding to the fixing rods. A sliding groove is provided on the inner side wall of the slot. A sliding block is slidably connected to the inner side wall of the sliding groove. A wedge-shaped clamping block is fixedly connected to the side of the sliding block close to the fixing rod. A clamping groove corresponding to the clamping block is provided on the outer side wall of the fixing rod. One end of the clamping block penetrates through the sliding groove and slidably extends into the clamping groove. Four support rods distributed in a rectangle are slidably inserted into the side of the sliding block close to the clamping block. A limiting block is fixedly connected to one end of the support rod. The other end of the support rod penetrates through the sliding block and is fixedly connected to the inner side wall of the sliding groove. A first spring is sleeved on the support rod, and both ends of the first spring abut against the sliding block and the inner side wall of the sliding groove respectively.

[0008] Preferably, a connecting rod is slidably inserted into the lower end of the support block, and the lower end of the connecting rod slidably penetrates through the second spring and is fixedly connected to the inner bottom of the placing groove.

[0009] Preferably, a plurality of placing grooves are distributed in a ring shape.

[0010] Preferably, arc-shaped grooves are provided at both the upper and lower ends of the sliding block, and rolling balls are rotatably connected to the inner side walls of the arc-shaped grooves. A part of the rolling balls penetrates through the arc-shaped grooves and abuts against the inner side wall of the sliding groove.

[0011] Preferably, a fixing ring is fixedly sleeved on the upper end of the fixing rod, and the upper side wall of the fixing ring is fixedly connected to the lower side wall of the contact piece.

[0012] Preferably, the lower end of the fixing rod is tapered.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. In the utility model, through the settings of the connecting sleeve, the fixing rod, the clamping block, the sliding block, the support rod, the anti-detachment block and the first spring, the rapid assembly and fitting operations of the conductive rod and the contact piece with the cup seat can be realized, and the convenience is improved;

[0015] 2. In the present utility model, through the arrangement of the second spring and the support block, the lower end of the contact piece can be elastically supported, avoiding the shaking of the contact piece and improving the stability; through the arrangement of mechanisms such as the fixing rod and the support block in the present utility model, the contact piece and the conductive rod can be quickly assembled and fixed to the cup base, thereby improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of an electrode structure with evenly distributed arcs in a vacuum interrupter proposed by the present utility model;

[0017] Figure 2 FIG. is an internal structural diagram of an electrode structure with evenly distributed arcs in a vacuum interrupter proposed by the present utility model;

[0018] Figure 3 FIG. is a schematic structural diagram of part A of an electrode structure with evenly distributed arcs in a vacuum interrupter proposed by the present utility model.

[0019] In the figure: 1 - cup base, 2 - contact piece, 3 - connecting sleeve, 4 - conductive rod, 5 - support block, 6 - connecting rod, 7 - second spring, 8 - fixing ring, 9 - fixing rod, 10 - clamping block, 11 - limiting block, 12 - slider, 13 - first spring, 14 - support rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] Referring to Figures 1 - 3 , an electrode structure with evenly distributed arcs in a vacuum interrupter includes a cup base 1 and contact pieces 2 and conductive rods 4 arranged at its upper and lower ends. A connecting sleeve 3 is sleeved on the conductive rod 4, which can facilitate the assembly and connection of the conductive rod 4 to the cup base 1. The connecting sleeve 3 is threadedly connected to the conductive rod 4, and the upper end of the connecting sleeve 3 is fixedly connected to the lower end of the cup base 1. There is a placement groove at the upper end of the cup base 1. The number of the placement grooves is distributed in a ring shape and is used to arrange a plurality of support blocks 5 to stably support the contact piece 2. A support block 5 is slidably connected to the inner side wall of the placement groove to support the contact piece 2. The upper end of the support block 5 penetrates through the placement groove and abuts against the lower end of the contact piece 2. A connecting rod 6 is slidably inserted into the lower end of the support block 5 to prevent the second spring 7 from being skewed. The lower end of the connecting rod 6 slidably penetrates through the second spring 7 and is fixedly connected to the inner bottom of the placement groove. A second spring 7 is fixedly connected between the lower end of the support block 5 and the inner bottom of the placement groove to elastically support the support block 5;

[0022] In this embodiment, the lower end of the contact piece 2 is fixedly connected with a plurality of fixing rods 9 distributed in an annular shape, which are used to prevent the contact piece 2 from loosening. The lower end of the fixing rod 9 is set in a cone shape, which is used to reduce the resistance when pushing the card block 10. The upper end of the fixing rod 9 is fixedly sleeved with a fixing ring 8, which is used to improve the firmness between the fixing rod 9 and the contact piece 2. The upper side wall of the fixing ring 8 is fixedly connected with the lower side wall of the contact piece 2. The upper end of the cup holder 1 is provided with a slot corresponding to the fixing rod 9, and a slide groove is provided on the inner side wall of the slot. The lower end of the fixing rod 9 slides and extends into the slot. A slider 12 is slidably connected to the inner side wall of the slide groove, which is used to drive the card block 10 to move and reset. The upper and lower ends of the slider 12 are provided with arc grooves, and the inner side wall of the arc groove is rollingly connected with a ball, which is used to reduce the resistance of the slider 12 when it moves. Part of the ball passes through the arc groove and abuts against the inner side wall of the slide groove.

[0023] In this embodiment, a wedge-shaped block 10 is fixedly connected to one side of the slider 12 close to the fixed rod 9, which is used to cooperate with the slot to lock the position of the fixed rod 9. A slot corresponding to the block 10 is provided on the outer wall of the fixed rod 9. One end of the block 10 penetrates the slot and slides into the slot. Four rectangularly distributed support rods 14 are slidably inserted on one side of the slider 12 close to the block 10, which are used to support and guide the movement of the slider 12. One end of the support rod 14 is fixedly connected to a limiting block 11 to prevent the slider 12 from completely detaching from the slot. The other end of the support rod 14 penetrates the slider 12 and is fixedly connected to the inner side wall of the slot. A first spring 13 is sleeved on the support rod 14 to elastically support the slider 12. The two ends of the first spring 13 respectively resist the slider 12 and the inner side wall of the slot.

[0024] In this embodiment, the conductive rod 4 is first screwed into the connecting sleeve 3, and the conductive rod 4 is connected and fixed to the cup holder 1 through the action of threaded engagement, so that the conductive rod 4 and the cup holder 1 are quickly assembled. At the same time, the contact piece 2 is manually pressed down to drive the fixing rod 9 to be inserted into the slot. During the insertion process, the lower end of the fixing rod 9 abuts against the wedge surface of the block 10. Under the influence of the thrust, the fixing rod 9 pushes the block 10 to move in the direction of the slide groove, and the block 10 drives the slider 12 to move, and the slider 12 compresses the first spring 13. When the contact piece 2 is fitted with the cup holder 1, the fixing rod 9 stops moving. At this time, the slider 12 is pushed to move and reset by the elasticity of the first spring 13, and the block 10 is pushed to move and reset into the slot by the slider 12, thereby locking the fixing rod 9 in position to prevent the contact piece 2 from loosening. After the contact piece 2 is pressed down and fitted with the cup holder 1, the second spring 7 elastically supports the support block 5, and the support block 5 elastically supports the lower side wall of the contact piece 2, thereby preventing the contact piece 2 from shaking and improving stability.

[0025] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A vacuum interrupter arc evenly distributed electrode structure, comprising a cup base (1) and contact pieces (2) and conductive rods (4) arranged at the upper and lower ends thereof, characterized in that: A connecting sleeve (3) is sleeved on the conductive rod (4). The connection between the connecting sleeve (3) and the conductive rod (4) is a threaded connection. The upper end of the connecting sleeve (3) is fixedly connected to the lower end of the cup base (1). The upper end of the cup base (1) is provided with a placing groove. A supporting block (5) is slidably connected to the inner side wall of the placing groove. The upper end of the supporting block (5) penetrates through the placing groove and abuts against the lower end of the contact piece (2). A second spring (7) is fixedly connected between the lower end of the supporting block (5) and the inner bottom of the placing groove. The lower end of the contact piece (2) is fixedly connected with a plurality of fixing rods (9) distributed in a ring shape. The upper end of the cup base (1) is provided with a slot corresponding to the fixing rod (9). A sliding groove is provided on the inner side wall of the slot. A slider (12) is slidably connected to the inner side wall of the sliding groove. A wedge-shaped clamping block (10) is fixedly connected to the side of the slider (12) close to the fixing rod (9). A clamping groove corresponding to the clamping block (10) is provided on the outer side wall of the fixing rod (9). One end of the clamping block (10) penetrates through the sliding groove and slides and extends into the clamping groove. Four support rods (14) distributed in a rectangle are slidably inserted into the side of the slider (12) close to the clamping block (10). A limiting block (11) is fixedly connected to one end of the support rod (14). The other end of the support rod (14) penetrates through the slider (12) and is fixedly connected to the inner side wall of the sliding groove. A first spring (13) is sleeved on the support rod (14). The two ends of the first spring (13) respectively abut against the slider (12) and the inner side wall of the sliding groove.

2. The arc uniform electrode structure of a vacuum interrupter according to claim 1, characterized in that: A connecting rod (6) is slidably inserted into the lower end of the supporting block (5). The lower end of the connecting rod (6) slidably penetrates through the second spring (7) and is fixedly connected to the inner bottom of the placing groove.

3. The arc-uniform electrode structure of a vacuum interrupter according to claim 1, characterized in that: The number of the placing grooves is multiple and distributed in a ring shape.

4. A vacuum interrupter arc uniform distribution type electrode structure according to claim 1, characterized in that: Arc-shaped grooves are provided at both the upper and lower ends of the slider (12). A ball is rotatably connected to the inner side wall of the arc-shaped groove. A part of the ball penetrates through the arc-shaped groove and abuts against the inner side wall of the sliding groove.

5. A vacuum interrupter arc-uniform electrode structure according to claim 1, characterized in that: A fixing ring (8) is fixedly sleeved on the upper end of the fixing rod (9). The upper side wall of the fixing ring (8) is fixedly connected to the lower side wall of the contact piece (2).

6. The arc-uniform electrode structure of a vacuum interrupter according to claim 1, characterized in that: The lower end of the fixing rod (9) is tapered.

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