Depth fusion solid-sealed polar pole with built-in isolating switch

Abstract

The utility model relates to the technical field of primary and secondary fusion complete column-mounted circuit breakers, and discloses a built-in isolation switch deep fusion solid-sealed polar pole which comprises a vacuum arc extinguish chamber, an isolation knife support, a circuit breaker insulation pull rod, an isolation knife and an isolation knife insulation pull rod. And a mounting cavity and an isolation knife cavity are arranged in the solid-sealed polar pole. And a vacuum arc-extinguishing chamber is arranged in the mounting cavity. The top of the vacuum arc-extinguishing chamber is provided with an arc-extinguishing chamber wiring hole. The isolation knife cavity is provided with an isolation knife wiring hole. And the circuit breaker insulating pull rod is matched with the bottom of the vacuum arc-extinguishing chamber. A wiring end of the isolation knife support is connected with a circuit breaker insulation pull rod. And the isolation knife is rotationally connected with the isolation knife support connecting end. The isolation knife insulation pull rod is rotatably connected with the isolation knife. And the isolation knife is matched with the isolation knife wiring hole. The isolating switch is arranged in the device. The electrified body is completely wrapped in the solid-sealed polar pole, so that complete insulation is realized, and the problems of clamping stagnation, corrosion, contamination and the like caused by outdoor long-time rain and ultraviolet and air corrosion are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of primary and secondary fused complete pole-mounted circuit breakers, in particular to a deeply fused and sealed pole with a built-in isolating switch. Background Art

[0002] The 10kV primary and secondary integrated pole-mounted circuit breaker is a three-phase AC 50Hz, rated voltage 12kV outdoor high-voltage AC vacuum switchgear, mainly used for breaking and closing load current, overload current and short-circuit current in the power system. Usually, the circuit breaker is equipped with an isolating switch to form a combined electrical appliance. The equipment and line wiring in the power grid are relatively complicated. With the long-term use of the equipment and various external factors, it is always necessary to shut down various equipment and lines for maintenance. After the circuit breaker trips, the isolating switch is separated to make it have an obvious disconnection point to ensure the safety of the equipment and maintenance personnel. At present, the isolating switches commonly used in 10kV pillar-type pole-mounted circuit breakers in the distribution network are all external manual or independent. This type of external isolating switch has a large design volume, which not only wastes raw materials, but also is cumbersome and wastes labor. The exposed live body fails to achieve full insulation. It is exposed to rain for a long time outdoors and corroded by ultraviolet rays and air. It often gets stuck, rusted, dirty, etc. during operation, resulting in increased circuit resistance, contact point heating, and switch refusal to operate. There are great safety hazards to the operation of power lines.

[0003] In order to solve the above problems, we propose a built-in disconnector with deep fusion and sealed pole. Utility Model Content

[0004] The purpose of the utility model is to provide a built-in isolating switch with a deeply fused and sealed pole, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a built-in disconnector with a deep fusion sealed pole, the sealed pole comprising a vacuum interrupter, an isolating knife support, a circuit breaker insulating rod, an isolating knife and an isolating knife insulating rod;

[0006] The sealed pole is provided with an installation cavity and an isolating knife cavity; the vacuum arc extinguishing chamber is provided in the installation cavity of the sealed pole; the isolating knife support, the circuit breaker insulating pull rod, the isolating knife and the isolating knife insulating pull rod are all arranged in the isolating knife cavity of the sealed pole;

[0007] An arc extinguishing chamber wiring hole is provided on the top of the vacuum arc extinguishing chamber; an isolation knife wiring hole is provided on one side of the isolation knife cavity of the sealed pole; the circuit breaker insulating pull rod cooperates with the bottom of the vacuum arc extinguishing chamber; the isolation knife support includes a wiring end and a connecting end; the wiring end of the isolation knife support is connected to the top of the circuit breaker insulating pull rod; one end of the isolation knife is rotatably connected to the isolation knife support connecting end; the top of the isolation knife insulating pull rod is rotatably connected to the middle of the isolation knife; the other end of the isolation knife is cooperated and connected with the isolation knife wiring hole of the sealed pole; the circuit breaker insulating pull rod and the isolation knife insulating pull rod are both slidably connected in the isolation knife cavity of the sealed pole.

[0008] Preferably, an incoming terminal is provided at the wiring hole of the arc extinguishing chamber at the top of the vacuum arc extinguishing chamber; an outgoing terminal is provided at the wiring hole of the isolating knife on the sealed pole; and the other end of the isolating knife is cooperatively connected with the outgoing terminal.

[0009] Preferably, the connection terminal of the isolating knife support is connected to the top of the insulating pull rod of the circuit breaker through a flexible connector.

[0010] Preferably, a silicone rubber layer is provided on the outer surface of the sealed pole.

[0011] Preferably, a silicone layer is provided between the vacuum interrupter and the mounting cavity of the sealed pole.

[0012] Preferably, a current sensor is provided on the sealed pole near the isolation knife connection hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The sealed pole is cast from outdoor silicone rubber and has excellent heat resistance, mechanical strength, high and low temperature impact resistance, crack resistance and electrical insulation properties.

[0015] 2. The isolating switch is placed inside the sealed pole of the circuit breaker, and the live body is completely wrapped inside the pole to achieve full insulation, avoiding problems such as jamming, rust, and dirt caused by long-term outdoor rain and ultraviolet and air corrosion.

[0016] 3. The isolation knife adopts the knife switch form, which has a simple and reliable structure.

[0017] 4. Set up a current sensor. When the circuit breaker is operating normally, the current sensor can collect the three-phase current and zero-sequence current on the load side, realizing deep integration of primary and secondary currents, which can not only realize short-circuit fault removal but also ensure the reliability of the break. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a left-side structural schematic diagram of the utility model;

[0020] Figure 3 for Figure 2 Cross-sectional view at point A in the middle.

[0021] In the figure: 1-sealed pole, 2-incoming terminal, 3-vacuum interrupter, 4-flexible connector, 5-isolating knife support, 6-circuit breaker insulating rod, 7-current sensor, 8-outgoing terminal, 9-isolating knife, 10-isolating knife insulating rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 , Figure 2 , Figure 3 The utility model provides a technical solution: a built-in disconnector with a deeply fused sealed pole, wherein the sealed pole 1 includes a vacuum interrupter 3, an isolating knife support 5, a circuit breaker insulating rod 6, an isolating knife 9 and an isolating knife insulating rod 10.

[0024] The sealed pole 1 is provided with an installation cavity and an isolating knife cavity. The vacuum interrupter 3 is provided in the installation cavity of the sealed pole 1. The isolating knife support 5, the circuit breaker insulating pull rod 6, the isolating knife 9 and the isolating knife insulating pull rod 10 are all arranged in the isolating knife cavity of the sealed pole 1.

[0025] The top of the vacuum arc chamber 3 is provided with an arc chamber wiring hole. One side of the isolating knife cavity of the sealed pole 1 is provided with an isolating knife wiring hole. The circuit breaker insulating pull rod 6 cooperates with the bottom of the vacuum arc chamber 3. The isolating knife support 5 includes a wiring end and a connecting end. The wiring end of the isolating knife support 5 is connected to the top of the circuit breaker insulating pull rod 6. One end of the isolating knife 9 is rotatably connected to the connecting end of the isolating knife support 5. The top of the isolating knife insulating pull rod 10 is rotatably connected to the middle of the isolating knife 9. The other end of the isolating knife 9 is cooperated and connected with the isolating knife wiring hole of the sealed pole 1. The circuit breaker insulating pull rod 6 and the isolating knife insulating pull rod 10 are both slidably connected in the isolating knife cavity of the sealed pole 1.

[0026] Among them, the circuit breaker insulating rod 6 and the isolating knife insulating rod 10 can be connected to the isolating knife cavity of the sealed pole 1 through a sliding rail, which can ensure that the circuit breaker insulating rod 6 and the isolating knife insulating rod 10 slide in a straight path.

[0027] Furthermore, an incoming terminal 2 is provided at the arc-extinguishing chamber wiring hole on the top of the vacuum arc-extinguishing chamber 3. An outgoing terminal 8 is provided at the isolating knife wiring hole on the sealed pole 1. The other end of the isolating knife 9 is matched and connected with the outgoing terminal 8.

[0028] Furthermore, the connection terminal of the isolation knife support 5 is connected to the top of the circuit breaker insulating pull rod 6 through a flexible connector 4. The flexible connector 4 is made of pure copper. The flexible connector 4 needs to be used to conduct current. The flexible connector 4 is made of layers of copper sheets stacked together and can be bent at will.

[0029] Furthermore, a silicone rubber layer is provided on the outer surface of the sealed pole 1. The sealed pole 1 can also be integrally cast by silicone rubber.

[0030] Furthermore, a silicone layer is provided between the vacuum interrupter 3 and the mounting cavity of the sealed pole 1 .

[0031] Furthermore, the sealed pole 1 is provided with a current sensor 7 near the isolation knife connection hole. The current sensor 7 is a detection device that can sense the information of the measured current and can transform the sensed information into an electrical signal or other required form of information output that meets certain standard requirements according to a certain rule, so as to meet the requirements of information transmission, processing, storage, display, recording and control.

[0032] Working principle:

[0033] The sealed pole 1 is cast from outdoor silicone rubber and has excellent heat resistance, mechanical strength, high and low temperature impact resistance, crack resistance, electrical insulation and other properties. The incoming terminal 2 is mounted on the top of the vacuum interrupter 3, and the outside of the vacuum interrupter 3 is coated with silicone and cast on the upper part of the sealed pole 1. The lower part of the moving end of the vacuum interrupter 3 is connected to the soft connector 4 through the circuit breaker insulating pull rod 6, and the circuit breaker insulating pull rod 6 is used for opening and closing operations.

[0034] The isolating knife support 5 is installed in the middle of the sealed pole 1, the flexible connector 4 is connected to the isolating knife support 5 by bolts, and the isolating knife 9 is installed on the isolating knife support 5. The isolating knife 9 rotates around the isolating knife support 5, and one side of the isolating knife insulating rod 10 is connected to the middle of the isolating knife 9. The isolating knife 9 is driven by the up and down movement of the isolating knife insulating rod 10 to complete the opening and closing operation of the isolating switch.

[0035] The outlet terminal 8 passes through the current sensor 7. The current sensor 7 is cast together with the outlet terminal 8 on the side of the sealed pole 1. One end of the outlet terminal 8 is connected to the isolation knife 9, and the other end of the outlet terminal 8 is used for external wiring. The current sensor 7 provides phase current and zero-sequence current signals, realizing deep integration of primary and secondary.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A built-in disconnector with deep fusion and sealed pole, characterized in that: The sealed pole (1) comprises a vacuum arc extinguishing chamber (3), an isolating knife support (5), a circuit breaker insulating pull rod (6), an isolating knife (9) and an isolating knife insulating pull rod (10); The sealed pole (1) is provided with an installation cavity and an isolating knife cavity; the vacuum arc extinguishing chamber (3) is provided in the installation cavity of the sealed pole (1); the isolating knife support (5), the circuit breaker insulating pull rod (6), the isolating knife (9) and the isolating knife insulating pull rod (10) are all arranged in the isolating knife cavity of the sealed pole (1); The top of the vacuum arc extinguishing chamber (3) is provided with an arc extinguishing chamber wiring hole; one side of the isolating knife cavity of the sealed pole (1) is provided with an isolating knife wiring hole; the circuit breaker insulating pull rod (6) cooperates with the bottom of the vacuum arc extinguishing chamber (3); the isolating knife support (5) includes a wiring end and a connecting end; the connecting end of the isolating knife support (5) is connected to the top of the circuit breaker insulating pull rod (6); one end of the isolating knife (9) is rotatably connected to the connecting end of the isolating knife support (5); the top of the isolating knife insulating pull rod (10) is rotatably connected to the middle of the isolating knife (9); the other end of the isolating knife (9) is cooperated and connected with the isolating knife wiring hole of the sealed pole (1); the circuit breaker insulating pull rod (6) and the isolating knife insulating pull rod (10) are both slidably connected in the isolating knife cavity of the sealed pole (1).

2. The deep fusion sealed pole of a built-in isolating switch according to claim 1, characterized in that: An incoming line terminal (2) is provided at the arc extinguishing chamber wiring hole at the top of the vacuum arc extinguishing chamber (3); an outgoing line terminal (8) is provided at the isolating knife wiring hole on the sealed pole (1); and the other end of the isolating knife (9) is cooperatively connected to the outgoing line terminal (8).

3. The deep fusion sealed pole of a built-in isolating switch according to claim 1, characterized in that: The connection terminal of the isolating knife support (5) is connected to the top of the circuit breaker insulating pull rod (6) via a flexible connector (4).

4. The deep fusion sealed pole of a built-in isolating switch according to claim 1, characterized in that: The outer surface of the sealed pole (1) is provided with a silicone rubber layer.

5. The deep fusion sealed pole of a built-in isolating switch according to claim 1, characterized in that: A silica gel layer is provided between the vacuum interrupter (3) and the mounting cavity of the sealed pole (1).

6. The deep fusion sealed pole of a built-in isolating switch according to claim 1, characterized in that: The sealed pole (1) is provided with a current sensor (7) near the isolation knife connection hole.

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