CN219418881U - Side-mounted breaker - Google Patents

Abstract

The utility model provides a side-mounted vacuum circuit breaker, which belongs to the technical field of circuit breakers and comprises a vacuum arc-extinguishing chamber, wherein the vacuum arc-extinguishing chamber comprises a shell, a moving contact, a fixed contact, a moving end conducting rod connected with the moving contact, a fixed end conducting rod connected with the fixed contact and a shielding cylinder; the arc extinguishing ribs can divide the arc, effectively improve the arc extinguishing performance, rapidly cool the arc, and simultaneously, the gas absorbing layers are arranged at the two ends of the shielding cylinder, so that the gas generated by arcing can be absorbed, the high vacuum degree in the vacuum arc extinguishing chamber is maintained, and the breaking stability and reliability of the vacuum arc extinguishing chamber are ensured.

Description

Side-mounted breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a side-mounted circuit breaker.

Background

The vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; the arc extinguishing device has the advantages of small volume, light weight, suitability for frequent operation and no maintenance in arc extinguishing, and is more popular in power distribution networks. The vacuum circuit breaker is an indoor distribution device in a 3-10 kV 50Hz three-phase alternating current system, can be used for protecting and controlling electrical equipment in industrial and mining enterprises, power plants and substations, is particularly suitable for use places requiring oilless maintenance and frequent operation, and can be arranged in a centrally installed switchgear, a double-layer cabinet and a fixed cabinet to be used for controlling and protecting high-voltage electrical equipment.

The side-mounted vacuum circuit breaker is a common vacuum circuit breaker, and as disclosed in China patent publication No. CN 204167189U, the 24kV side-mounted vacuum circuit breaker comprises an L-shaped frame, a first pole, a second pole and a third pole are arranged on the long side of the L-shaped frame, a vacuum arc-extinguishing chamber is arranged in the first pole, the second pole and the third pole respectively, a fixed contact and a movable contact are arranged in the vacuum arc-extinguishing chamber, the arc-extinguishing effect of the vacuum arc-extinguishing chamber of the structure is poor, and metal steam generated in the arcing process easily influences the vacuum degree in the vacuum arc-extinguishing chamber.

Disclosure of Invention

The utility model aims to overcome the defects and shortcomings in the prior art and provides a side-mounted circuit breaker.

The technical scheme adopted by the utility model is as follows: the utility model provides a side-mounted circuit breaker, includes the frame and sets up three solid utmost point post in the frame side by side, solid utmost point post is including insulating barrel and the vacuum interrupter of setting in insulating barrel, vacuum interrupter is including casing, moving contact, stationary contact, the moving end conducting rod of being connected with the moving contact and the stationary end conducting rod of being connected with the stationary contact, vacuum interrupter is still including a shielding section of thick bamboo, the casing both ends are provided with moving end apron and stationary end cover plate, the shielding section of thick bamboo sets up between casing and moving contact and stationary contact, the inner wall periphery of shielding section of thick bamboo is provided with a plurality of arc extinguishing ribs, moving end apron is provided with first breathing layer towards moving contact one side, stationary end cover plate is provided with the second breathing layer towards stationary contact one side, shielding section of thick bamboo both ends are supported to first breathing layer and second breathing layer respectively.

The first getter layer and the second getter layer are made of getter materials.

The arc extinguishing ribs are straight or spiral.

A vacuum cooling layer is arranged between the shell and the shielding cylinder, and cooling materials are arranged in the vacuum cooling layer.

The movable end cover plate is provided with a positioning pipe, the movable end conducting rod is arranged in the positioning pipe in a sliding mode, and a corrugated pipe is arranged on the circumference of the movable end conducting rod.

The end face of the first air suction layer, which faces the moving contact, is provided with a first annular groove matched with the shielding cylinder, and a first sealing piece is arranged in the first annular groove.

The end face of the second air suction layer, which faces the fixed contact, is provided with a second annular groove matched with the shielding cylinder, and a second sealing piece is arranged in the second annular groove.

The first sealing piece and the second sealing piece are in sealing fit with the shielding cylinder.

The device comprises a frame, a fixed sealing pole, a movable end conducting rod, an insulating pull rod, a driving mechanism and a driving mechanism.

The beneficial effects of the utility model are as follows: the shielding cylinder can prevent the arc generated when the stop and static contact are opened and closed from breaking through the shell, and meanwhile, the inner wall of the shielding cylinder is provided with a plurality of arc extinguishing ribs, so that the arc can be divided, the arc extinguishing performance can be effectively improved, the arc can be rapidly cooled, and the two ends of the shielding cylinder are provided with the gas absorbing layers, so that the gas generated by arcing can be absorbed, the high vacuum degree in the vacuum arc extinguishing chamber is maintained, and the breaking stability and reliability of the vacuum arc extinguishing chamber are ensured.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is a schematic diagram of the present utility model;

fig. 2 is a cross-sectional view of a vacuum interrupter according to the present utility model;

fig. 3 is a schematic view of an arc extinguishing rib in the present utility model;

FIG. 4 is an enlarged view of FIG. 2 at A;

FIG. 5 is an enlarged view at B in FIG. 2;

FIG. 6 is a second schematic diagram of the present utility model;

in the figure, 1-rack, 2-solid sealed polar pole, 21-insulating cylinder, 22-vacuum arc extinguishing chamber, 3-shell, 4-moving contact, 5-static contact, 6-moving end conducting rod, 7-static end conducting rod, 8-shielding cylinder, 81-arc extinguishing rib, 9-moving end cover plate, 10-static end cover plate, 11-first air suction layer, 111-first annular groove, 112-first sealing element, 12-second air suction layer, 121-second annular groove, 122-second sealing element, 13-vacuum cooling layer, 14-positioning tube and 15-corrugated tube.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.

It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.

The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.

As shown in fig. 1 to 6, an embodiment of the present utility model is provided:

the utility model provides a side-mounted circuit breaker, includes frame 1 and three solid utmost point post 2 of setting side by side on frame 1, and frame 1 is L shape, solid utmost point post 2 is including insulating barrel 21 and the vacuum interrupter 22 of setting in insulating barrel 21, vacuum interrupter 22 is including casing 3, moving contact 4, moving contact 5, the moving end conducting rod 6 of being connected with moving contact 4 and the quiet end conducting rod 7 of being connected with moving contact 5, and moving end conducting rod 6 electricity is connected with down the conducting piece, and quiet end conducting rod 7 electricity is connected with the conducting piece, is provided with respectively on the insulating barrel 21 and goes out the line post with down the line post, goes up the conducting piece and corresponds respectively with lower conducting piece and be connected to last line post and down the line post.

The vacuum interrupter 22 is still including shielding section of thick bamboo 8, can prevent stopping, the electric arc that produces when the static contact switching breaks down casing 3, also can even inside electric field distribution, casing 3 both ends are provided with moving end cover plate 9 and static end cover plate 10, shielding section of thick bamboo 8 sets up between casing 3 and moving contact 4 and static contact 5, shielding section of thick bamboo 8's inner wall periphery is provided with a plurality of arc extinguishing ribs 81, can cut apart the electric arc, effectively promotes the extinction performance, also can cool off the electric arc fast, arc extinguishing ribs 81 are straight or spiral, in this embodiment, as shown in fig. 3, arc extinguishing ribs 81 are straight, and its length can cover moving contact 4 and static contact 5 action area.

The movable end cover plate 9 is provided with a first air suction layer 11 towards one side of the movable contact 4, the static end cover plate 10 is provided with a second air suction layer 12 towards one side of the static contact 5, two ends of the shielding cylinder 8 are respectively propped against the first air suction layer 11 and the second air suction layer 12, and through arranging the air suction layers at two ends of the shielding cylinder 8, gas generated by arcing can be absorbed, the high vacuum degree in the vacuum arc extinguishing chamber is maintained, and therefore the breaking stability and reliability of the vacuum arc extinguishing chamber are guaranteed. The first getter layer 11 and the second getter layer 12 are made of getter materials, and the getter materials can absorb residual active gases in the vacuum device through physical and chemical actions, such as zirconium aluminum alloy getter, zircon ink getter, high-firmness getter and the like.

Further, a vacuum cooling layer 13 is disposed between the housing 3 and the shielding cylinder 8, and a cooling material is disposed in the vacuum cooling layer 13, which can be liquid metal such as gallium or indium, and carbon nanotubes and three typical high thermal conductivity metal nanoparticles (gold, silver, copper) can be added into the vacuum cooling layer, so that the physical properties such as thermal conductivity of the liquid metal are further enhanced, the vacuum cooling layer has better adaptability, the temperature of an electric arc can be effectively reduced, and the extinction of the electric arc is facilitated.

The movable end cover plate 9 is provided with a positioning pipe 14, the movable end conducting rod 6 is slidably arranged in the positioning pipe 14, a corrugated pipe 15 is circumferentially arranged on the movable end conducting rod 6, and the vacuum degree inside the vacuum arc-extinguishing chamber is ensured when the movable end conducting rod 6 acts.

Further, the first air suction layer 11 is provided with a first annular groove 111 adapted to the shielding cylinder 8 towards the end face of the moving contact 4, a first sealing element 112 is provided in the first annular groove 111, a second annular groove 121 adapted to the shielding cylinder 8 is provided towards the end face of the fixed contact 5 by the second air suction layer 12, a second sealing element 122 is provided in the second annular groove, the first sealing element 112 and the second sealing element 122 are in sealing fit with the shielding cylinder 8, a vacuum chamber is formed inside and outside the shielding cylinder 8, and in this embodiment, the first sealing element 112 and the second sealing element 122 adopt sealing rings with splayed cross sections, and can be respectively matched with two ends of the shielding cylinder 8 to be inserted into effective sealing.

The operation mechanism is arranged on one side of the frame 1, the transmission mechanism is arranged on the frame 1 below the solid-sealed pole 2, the movable end conducting rod 6 is connected with an insulation pull rod, the insulation pull rod is connected with the transmission mechanism, the transmission mechanism is linked with the operation mechanism, and the structure of the operation mechanism and the transmission mechanism can refer to a side-mounted vacuum circuit breaker disclosed in China patent with publication number CN 208400775U or a miniaturized side-mounted high-voltage vacuum circuit breaker disclosed in China patent with publication number CN 205159197U, which is not described in detail herein.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims (9)

1. The utility model provides a side-mounted circuit breaker, includes frame (1) and three solid utmost point post (2) of setting up side by side on frame (1), solid utmost point post (2) including insulating barrel (21) and set up vacuum interrupter (22) in insulating barrel (21), vacuum interrupter (22) are including casing (3), moving contact (4), stationary contact (5), moving end conducting rod (6) and stationary contact (5) connected with moving contact (4) stationary end conducting rod (7), a serial communication port, vacuum interrupter (22) still including shielding cylinder (8), casing (3) both ends are provided with moving end apron (9) and stationary end apron (10), shielding cylinder (8) set up between casing (3) and moving contact (4) and stationary contact (5), the inner wall week of shielding cylinder (8) is provided with a plurality of ribs (81), moving end apron (9) are provided with first inhaling layer (11) towards moving contact (4) one side, shielding cylinder (8) are provided with first inhaling layer (12) towards second gas layer (12) respectively, second gas layer (12) inhale layer (12) to one side.

2. A side-mounted circuit breaker according to claim 1, characterized in that the first and second getter layers (11, 12) are made of getter material.

3. A side-mounted circuit breaker according to claim 1, characterized in that the extinguishing rib (81) is straight or spiral.

4. A side-mounted circuit breaker according to claim 1, characterized in that a vacuum cooling layer (13) is arranged between the housing (3) and the shielding cylinder (8), and that a cooling material is arranged in the vacuum cooling layer (13).

5. A side-mounted circuit breaker according to claim 1, characterized in that the moving end cover plate (9) is provided with a positioning tube (14), the moving end conducting rod (6) is slidably arranged in the positioning tube (14), and the moving end conducting rod (6) is circumferentially provided with a corrugated tube (15).

6. A side-mounted circuit breaker according to claim 1, characterized in that the end face of the first gas-absorbing layer (11) facing the moving contact (4) is provided with a first ring groove (111) adapted to the shielding cylinder (8), and that a first sealing element (112) is arranged in the first ring groove (111).

7. A side-mounted circuit breaker according to claim 6, characterized in that the end face of the second gas-absorbing layer (12) facing the stationary contact (5) is provided with a second ring groove (121) adapted to the shielding cylinder (8), and that a second sealing element (122) is arranged in the second ring groove (121).

8. A side-mounted circuit breaker according to claim 7, characterized in that the first seal (112) and the second seal (122) are both in sealing engagement with the shielding cylinder (8).

9. The side-mounted circuit breaker according to claim 1, wherein an operating mechanism is arranged on one side of the frame (1), a transmission mechanism is arranged on the frame (1) below the three solid-sealed polar poles (2), the movable end conducting rod (6) is connected with an insulating pull rod, the insulating pull rod is connected with the transmission mechanism, and the transmission mechanism is linked with the operating mechanism.