CN222653861U

CN222653861U - Three-station isolating switch

Info

Publication number: CN222653861U
Application number: CN202421274900.0U
Authority: CN
Inventors: 杨明朝; 高佩; 杨宸赫; 杨语熙
Original assignee: Individual
Current assignee: Individual
Priority date: 2024-06-05
Filing date: 2024-06-05
Publication date: 2025-03-21
Anticipated expiration: 2034-06-05

Abstract

The utility model relates to the technical field of disconnectors, and in particular to a three-position disconnector, wherein the technical solution comprises an isolation frame, an insulating main shaft rotatably mounted in the isolation frame, an insulating beam parallel to the axis of the insulating main shaft is provided above the inner side of the isolation frame, a busbar parallel to the axis of the insulating main shaft is provided above the other end of the insulating beam, and the insulating main shaft is provided with an insulating crank arm, which has three insulating crank arms and is equidistantly arranged on the insulating main shaft, the insulating crank arm is integrated with the insulating main shaft, and the moving knife is cast inside the insulating crank arm. The utility model uses APG (automatic pressure gel) to cast the insulating main shaft, the insulating crank arm, and the moving knife into an integrated structure, thereby eliminating electrical gaps, having good electrical performance, small partial discharge, high strength of the insulating main shaft, small deformation in operation, and better synchronization between the three phases; a detachable contact is provided on the moving knife, which is convenient for replacing the contact separately, and does not require replacing the entire insulating main shaft, thereby improving maintenance efficiency and reducing maintenance costs.

Description

Three-station isolating switch

Technical Field

The utility model relates to the technical field of isolating switches, in particular to a three-station isolating switch.

Background

An isolating switch is an electric device which is mainly used for isolating a power supply, switching operation and switching on and off a small-current circuit.

The utility model discloses an insulating main shaft structure of a three-station isolating switch, which comprises an isolating frame, an isolating operation mechanism and an insulating main shaft arranged in the isolating frame, wherein the isolating operation mechanism is in driving connection with the insulating main shaft, the insulating main shaft comprises a left operation shaft, a right operation shaft and an intermediate operation shaft, three shafts are sequentially connected to form a three-shaft connector, the three shafts are cast through APG to form the insulating main shaft, and two knife blades are directly and fixedly connected to the left operation shaft, the intermediate operation shaft and the right operation shaft.

The prior art has the following defects that the knife blade is directly and fixedly connected to the left operation shaft, the middle operation shaft and the right operation shaft, the fixing mode is not flexible enough and is difficult to adapt to the requirements under different working conditions and loads, when the knife blade is worn and damaged, the whole insulating main shaft possibly needs to be replaced, only the damaged part cannot be replaced, the maintenance cost is increased, the complexity of installation and replacement is also increased, and the time consumption is long.

In view of this, we propose a three-position disconnecting switch to solve the existing problems.

Disclosure of utility model

The utility model aims to provide a three-station isolating switch so as to solve the problems in the prior art.

The three-station isolating switch comprises an isolating frame, an insulating main shaft rotatably arranged in the isolating frame, an insulating beam parallel to the axis of the insulating main shaft is arranged above the inner side of the isolating frame, a busbar parallel to the axis of the insulating main shaft is arranged above the other end of the insulating beam, insulating crank arms are arranged on the insulating main shaft, three insulating crank arms are equidistantly arranged on the insulating main shaft, movable cutters are arranged at the top ends of the insulating crank arms, the insulating main shaft, the insulating crank arms and the movable cutters are integrally molded through APG, and contacts are detachably arranged at two ends of the movable cutters.

Preferably, the insulating main shaft further comprises a rotating shaft, the rotating shaft is arranged on the central axis of the insulating main shaft, and the rotating shaft rotates to drive the insulating main shaft to rotate.

Preferably, one end of the rotating shaft penetrates through the side wall of the isolation frame to be arranged at the outer side of the isolation frame, and is provided with a connecting key, and an external driving device for driving the insulating main shaft to rotate is connected through the connecting key.

Preferably, the isolation frame further comprises cross beams connected to side walls at opposite ends in the isolation frame, and the bus bars are fixed to side walls at one end of the cross beams located in the isolation frame.

Preferably, the busbar is provided with three ground knives, and the three ground knives are equidistantly arranged on the end face of the busbar and correspond to the positions of the insulating crank arms on the insulating main shaft.

Preferably, the insulating beam is provided with three static contact seats, and the three static contact seats are respectively equidistantly arranged on the insulating beam and correspond to the insulating crank arm of the insulating main shaft.

Preferably, an insulation Liang Sanqun is arranged between two adjacent static contact seats or between the static contact seat and the side wall of the isolation frame.

Preferably, an insulating main shaft umbrella skirt is arranged between two adjacent insulating crank arms or between the insulating crank arms and the side wall of the isolation frame on the insulating main shaft, and the insulating main shaft umbrella skirt and the insulating main shaft are integrally molded through APG.

Preferably, the two side ends of the movable knife are connected with detachable contacts through bolt fastening.

Compared with the prior art, the automatic pressure gel casting device has the beneficial effects that the insulating main shaft, the insulating crank arm and the movable knife are cast into an integrated structure through the APG (automatic pressure gel), so that the insulating main shaft has high strength, small operation deformation and better synchronization among three phases, and the movable knife is provided with the detachable contact, so that the contact can be conveniently and independently replaced without replacing the whole insulating main shaft, thereby improving the maintenance efficiency and reducing the maintenance cost.

Drawings

FIG. 1 is a schematic three-dimensional perspective view of the present utility model in a disconnected station state;

FIG. 2 is a schematic three-dimensional structure diagram of the utility model in a closing station state;

FIG. 3 is a schematic top view of the present utility model in a disconnected station state;

Fig. 4 is a schematic diagram of a front view structure of the present utility model in a closing station state.

In the figure, 1, an isolation frame, 2, an insulating main shaft, 21, a rotating shaft, 22, an insulating crank arm, 23, a contact, 24, a movable knife, 25, an insulating main shaft umbrella skirt, 3, an insulating beam, 31, a static contact seat, 32, insulation Liang Sanqun, 4, a cross beam, 5, a busbar, 51 and a ground knife.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

Example 1

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the three-station isolating switch provided by the utility model comprises an isolating frame 1, an isolating main shaft 2 rotatably arranged in the isolating frame 1, an isolating beam 3 parallel to the axis of the isolating main shaft 2 and arranged above the inner side of the isolating frame 1, a busbar 5 parallel to the axis of the isolating main shaft 2 and arranged above the other end of the isolating beam 3, an insulating crank arm 22 arranged on the isolating main shaft 2, three insulating crank arms 22 arranged on the isolating main shaft 2 at equal intervals, moving blades 24 arranged at the top ends of the insulating crank arms 22, wherein the isolating main shaft 2, the insulating crank arms 22 and the moving blades 24 are integrally cast through APG, contacts 23 are detachably arranged at two ends of the moving blades 24, the isolating main shaft 2 rotates to drive the insulating crank arms 22 and the moving blades 24 on the isolating main shaft to rotate together, and the moving blades 24 can be selectively contacted with a static contact seat 31 or the busbar 5 or not contacted with the static contact seat 31 or the busbar 5 on the insulating beam 3 according to the rotating direction of the isolating main shaft 2, so that the switching of the circuit between the three stations is realized.

Further, the insulation main shaft 2 further comprises a rotating shaft 21, the rotating shaft 21 is arranged on the central axis of the insulation main shaft 2, and the rotating shaft 21 rotates to drive the insulation main shaft 2 to rotate.

Further, one end of the rotating shaft 21 passes through the side wall of the isolation frame 1 and is arranged at the outer side of the isolation frame 1, and is provided with a connecting key, an external driving device for driving the insulating main shaft 2 to rotate is connected through the connecting key, when the external driving device drives the rotating shaft 21 to rotate, the insulating main shaft 2 can rotate along with the rotating shaft, and in the rotating process, the movable knife 24 on the insulating crank arm 22 can selectively contact with or separate from the static contact seat 31 on the insulating beam 3 or the ground knife 51 on the busbar 5, so that the connection or disconnection of a circuit is realized.

Further, the isolation frame 1 further includes a cross member 4 connected to opposite end side walls of the isolation frame 1, and the bus bar 5 is fixed to one end side wall of the cross member 4 located inside the isolation frame 1.

Further, the busbar 5 is provided with three ground knives 51, the three ground knives 51 are equidistantly arranged on the end face of the busbar 5, the three ground knives 51 correspond to the position of the insulating crank arm 22 on the insulating main shaft 2, the insulating crank arm 22 is in contact with the busbar 5, the movable knife 24 and the contact 23 are in contact conduction with the ground knives 51, and the isolating switch is in a ground protection station.

Further, the insulating beam 3 is provided with three static contact seats 31, the three static contact seats 31 are respectively and equidistantly arranged on the insulating beam 3 and correspond to the insulating crank arm 22 of the insulating main shaft 2, the insulating crank arm 22 is in contact with the insulating beam 3, the movable knife 24 and the contact 23 are in contact conduction with the static contact seats 31, and the isolating switch is in a connection state.

Further, an insulating beam umbrella skirt 32 is arranged between two adjacent static contact seats 31 or between the static contact seat 31 and the side wall of the isolation frame 1.

Further, an insulating spindle umbrella skirt 25 is arranged between two adjacent insulating crank arms 22 on the insulating spindle 2 or between the insulating crank arms 22 and the side wall of the isolation frame 1, and the insulating spindle umbrella skirt 25 and the insulating spindle 2 are integrally molded through APG (advanced manufacturing process) for ensuring the reliability of electrical isolation.

Further, the two side ends of the moving blade 24 are connected with the detachable contacts 23 through bolt fastening, so that the contacts 23 with serious loss can be conveniently adjusted or replaced, and the contact performance of the moving blade 24, the contacts 23 and the static contact seat 31 or the ground blade 51 can be optimized by adjusting the relative positions between the contacts 23 and the moving blade 24 or adjusting the torque of the bolts, so that the connection is firmer, and the reliability and stability of the electrical connection are improved.

The working principle of the three-station isolating switch based on the first embodiment is that the main shaft body of the insulating main shaft 2 is made of epoxy resin, the insulating main shaft 2 is integrally connected with an insulating crank arm 22, a movable knife 24, a rotating shaft 21 and an insulating main shaft umbrella skirt 25 through APG (automatic pressure gel) in a pouring mode, a contact 23 is fixed with the movable knife 24 through bolts, when the three-station switch needs to be isolated and closed, the insulating main shaft 2 drives the movable knife 24 and the contact 23 to rotate towards a static contact seat 31 under the action of an external driving device until all contacts are contacted, the isolating and closing is finished, when the three-station switch needs to be isolated and opened, the insulating main shaft 2 drives the movable knife 24 and the contact 23 to rotate towards the opposite direction of the isolating and closing until all the isolating and opening are separated to reach a designated position, and the external driving device drives the insulating main shaft 2 to rotate towards one side of a busbar 5 to contact or separate from the busbar 5, so that the grounding and closing or grounding and opening operations are realized.

The above-described embodiments are merely a few preferred embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.

Claims

1. The three-station isolating switch comprises an isolating frame (1), an insulating main shaft (2) rotatably arranged in the isolating frame (1), an insulating beam (3) parallel to the axis of the insulating main shaft (2) is arranged above the inner side of the isolating frame (1), a busbar (5) parallel to the axis of the insulating main shaft (2) is arranged above the other end of the insulating beam (3), and the three-station isolating switch is characterized in that insulating crank arms (22) are arranged on the insulating main shaft (2), the insulating crank arms (22) are three and are equidistantly arranged on the insulating main shaft (2), a movable cutter (24) is cast inside the insulating crank arms (22), the insulating main shaft (2), the insulating crank arms (22) and the movable cutter (24) are integrally molded through APG, and contacts (23) are detachably arranged at two side ends of the movable cutter (24).

2. The three-position isolating switch of claim 1, wherein the insulating main shaft (2) further comprises a rotating shaft (21), the rotating shaft (21) is arranged on the central axis of the insulating main shaft (2), and the rotating shaft (21) rotates to drive the insulating main shaft (2) to rotate.

3. A three-position isolating switch as defined in claim 2, wherein one end of the rotating shaft (21) penetrates through the side wall of the isolating frame (1) and is arranged outside the isolating frame (1), and a connecting key is arranged, and an external driving device for driving the insulating main shaft (2) to rotate is connected through the connecting key.

4. A three-position isolating switch as defined in claim 1, wherein the isolating frame (1) further comprises a cross beam (4) connected to opposite end side walls of the isolating frame (1), and the bus bar (5) is fixed to one end side wall of the cross beam (4) located inside the isolating frame (1).

5. The three-position disconnecting switch of claim 4, wherein the busbar (5) is provided with three ground knives (51), and the three ground knives (51) are equidistantly arranged on the end face of the busbar (5) and correspond to the positions of the insulating crank arms (22) on the insulating main shaft (2).

6. The three-position isolating switch of claim 1, wherein the insulating beam (3) is provided with three static contact seats (31), and the three static contact seats (31) are respectively equidistantly arranged on the insulating beam (3) and correspond to the insulating crank arm (22) of the insulating main shaft (2).

7. A three-position isolating switch as defined in claim 6, wherein an insulation Liang Sanqun (32) is arranged between two adjacent static contact bases (31) and between the static contact bases (31) and the side wall of the isolating frame (1).

8. The three-position isolating switch of claim 1, wherein an insulating main shaft umbrella skirt (25) is arranged between two adjacent insulating crank arms (22) on the insulating main shaft (2) and between the insulating crank arms (22) and the side wall of the isolating frame (1), and the insulating main shaft umbrella skirt (25) and the insulating main shaft (2) are integrally molded through APG (amorphous glass ceramic) casting.

9. A three-position disconnecting switch according to claim 1, wherein the two side ends of the movable knife (24) are connected with detachable contacts (23) through bolt fastening.