Solid-sealed polar pole and ring main unit

Abstract

The utility model belongs to the technical field of high-voltage circuit breaker assembling and manufacturing, and particularly relates to a solid-sealed polar pole and a ring main unit. A first outgoing line conductive arm is fixedly connected with the static end of a vacuum arc-extinguishing chamber, the movable end of the vacuum arc-extinguishing chamber is connected with a second outgoing line conductive arm through flexible connection, the outgoing line end of the first outgoing line conductive arm is arranged in a connecting sleeve, and a shell, the vacuum arc-extinguishing chamber, the first outgoing line conductive arm, the second outgoing line conductive arm and the sleeve are integrally formed. And the connecting sleeve is used for connecting the solid-sealed polar pole with a cable joint. By pouring the part of the vacuum arc-extinguishing chamber except the moving end, the first outgoing line conductive arm, the second outgoing line conductive arm and the sleeve into a sealed whole, the insulating property is greatly improved, the overall size and the occupied space are reduced, and by arranging the connecting sleeve, the vacuum arc-extinguishing chamber can be in standardized connection with a cable joint of a gas tank.

Description

Technical Field

[0001] The present application belongs to the technical field of high-voltage circuit breaker assembly and manufacturing, and in particular relates to a sealed pole and a ring network cabinet. Background Art

[0002] A solid-sealed pole is a standalone component that encapsulates the vacuum interrupter, conductive connections, and / or terminals with solid insulating material. By curing and bonding the vacuum interrupter and conductive terminals together with epoxy resin, the solid-sealed pole is virtually impervious to the adverse effects of external contamination and moisture, improving the system's insulation performance and reliability. This design not only optimizes the electric field distribution but also reduces the number of structural components, increasing the reliability of the conductive circuit.

[0003] Chinese patent publication number CN201229895Y discloses a fully enclosed pole pole for the main circuit of a trolley-type vacuum circuit breaker. The pole pole comprises a housing, a vacuum interrupter chamber housed therein, and upper and lower contact arms. The rear end of the lower contact arm is fixedly connected to one end of a flexible connector, the other end of which is fixedly connected to the movable end of the vacuum interrupter chamber. The rear end of the upper contact arm is directly bolted to the static end of the vacuum interrupter chamber to form an integrated structure. However, this structural design makes it difficult to connect the pole pole to the cable connector on the gas tank. Summary of the Invention

[0004] In response to the above-mentioned problems existing in the prior art, the present application provides a sealed pole and a ring network cabinet, which can solve the problem of inconvenient connection between the pole and the cable connector.

[0005] To achieve the above objectives, the technical solutions provided by this application are as follows:

[0006] In the first aspect, the present application provides a sealed pole, comprising a shell, and a vacuum arc chamber arranged in the shell, a first outlet conductive arm and a second outlet conductive arm, the first outlet conductive arm is fixedly connected to the static end of the vacuum arc chamber, the moving end of the vacuum arc chamber is connected to the second outlet conductive arm through a flexible connection, the outlet end of the first outlet conductive arm is arranged in a connecting sleeve, the shell, the vacuum arc chamber, the first outlet conductive arm, the second outlet conductive arm and the sleeve are integrally formed, and the connecting sleeve is used to connect the sealed pole to the cable connector on the gas box.

[0007] Optionally, the movable end of the vacuum interrupter includes a movable conductive rod, a conductive clamp is provided below the movable conductive rod, and the movable conductive rod is connected to the flexible connection through the conductive clamp.

[0008] Optionally, the connecting sleeve includes a C-shaped sleeve, a threaded hole is provided at the end of the C-shaped sleeve, and the cable connector is connected to the C-shaped sleeve by locking with a second bolt and the threaded hole.

[0009] Optionally, the static end of the vacuum interrupter is connected to the first outgoing conductive arm through a first bolt.

[0010] Optionally, the first outgoing conductive arm includes a conductive copper rod, one end of the conductive copper rod is connected to the static end of the vacuum interrupter, and the other end is provided with a connecting sleeve.

[0011] Optionally, a driving mechanism is connected below the movable conductive rod via an insulating pull rod, and the driving mechanism is used to drive the movable conductive rod to slide.

[0012] Optionally, the shell is cast from a mixture of polycarbonate, polyphenylene sulfide and polyamide, and the vacuum interrupter portion except the moving end, the first outgoing conductive arm, the second outgoing conductive arm and the bushing are cast into a sealed whole.

[0013] Optionally, the flexible connection adopts a conductive belt, one end of the conductive belt is connected to the conductive clamp, and the other end is connected to the second outgoing conductive arm.

[0014] In a second aspect, the present application also provides a ring main unit comprising the above-mentioned sealed pole.

[0015] Compared with the prior art, this application has at least the following beneficial effects:

[0016] By casting the vacuum interrupter (excluding the moving end), the first and second conducting arms, and the bushing into a sealed, integrated unit, this significantly improves insulation performance and reduces overall volume and space. The provision of a connecting bushing allows for standardized connection to the cable connector. The end of the connecting bushing allows for convenient connection of the sealed pole to the cable connector via a second bolt, avoiding installation deviations caused by gas box machining errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a schematic structural diagram of a sealed pole in an embodiment of the present application;

[0019] Description of reference numerals:

[0020] 1. Shell; 2. Vacuum interrupter; 21. First bolt; 22. Upper copper insert; 3. First outgoing conductive arm; 4. Second outgoing conductive arm; 5. Movable conductive rod; 51. Conductive clamp; 6. Flexible connector; 7. Insulating pull rod. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only some embodiments of the present application, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application, its application, or use.

[0022] Example 1

[0023] like Figure 1 As shown, a sealed pole comprises a shell 1, a vacuum interrupter 2, a first outgoing conductive arm 3 and a second outgoing conductive arm 4 arranged in the shell 1, the first outgoing conductive arm 3 is fixedly connected to the static end of the vacuum interrupter 2, the moving end of the vacuum interrupter 2 is connected to the second outgoing conductive arm 4 via a flexible connection 6, the outgoing end of the first outgoing conductive arm 3 is arranged in a connecting sleeve, the shell 1, the vacuum interrupter 2, the first outgoing conductive arm 3, the second outgoing conductive arm 4 and the sleeve are integrally formed, and the connecting sleeve (not shown in the figure) is used to connect the sealed pole to the cable connector.

[0024] The vacuum interrupter 2 inside the solid-sealed pole is the core component of the vacuum switch. The solid-sealed pole is cast into a sealed whole using a mixture of three materials: polycarbonate, polyphenylene sulfide, and polyamide, which greatly improves the insulation performance and reduces the overall volume. When the moving end is separated from the static end, a vacuum arc is generated, which is extinguished when the current passes through zero, thereby disconnecting the current in the circuit. When in use, the second outgoing conductive arm 4 is connected to the isolating switch, and the first outgoing conductive arm 3 is connected to the cable connector on the gas box through the sleeve to form a closed loop. By setting the connecting sleeve, the solid-sealed pole and the cable connector can be connected in a standardized manner, avoiding installation deviations caused by gas box processing errors.

[0025] Example 2

[0026] This embodiment differs from Embodiment 1 in that the movable end of the vacuum interrupter 2 includes a movable conductive rod 5, a conductive clamp 51 is provided below the movable conductive rod 5, and the movable conductive rod 5 is connected to the flexible connection 6 via the conductive clamp 51. A driving mechanism is connected below the movable conductive rod 5 via an insulating pull rod 7, and the driving mechanism is used to drive the movable conductive rod 5 to slide.

[0027] The driving mechanism drives the insulating pull rod 7 to move, and uses the insulating pull rod 7 to drive the movable conductive rod 5 to move, so that the conductive rod contacts or moves away from the static end. When the movable conductive rod 5 separates from the static end, a vacuum arc is generated and extinguished when the current passes through zero, thereby disconnecting the current in the circuit.

[0028] In this embodiment, the flexible connection 6 is a conductive belt, one end of which is connected to the conductive clamp 51 , and the other end of which is connected to the second outgoing conductive arm 4 .

[0029] The static end of the vacuum interrupter 2 is connected to the first outgoing conductive arm 3 via a first bolt 21. In this embodiment, the first outgoing conductive arm 3 comprises an L-shaped conductive copper rod, one end of which is bolted to the upper copper insert 22 at the static end of the vacuum interrupter 2, and the other end is provided with a connecting sleeve.

[0030] The connecting sleeve includes a C-type sleeve, the end of the C-type sleeve is provided with a threaded hole, the cable connector is connected to the C-type sleeve by locking the second bolt and the threaded hole, and the threaded hole of the connecting sleeve can be used to conveniently connect the sealed pole and the cable connector through the second bolt.

[0031] The shell 1 is cast from a mixture of polycarbonate, polyphenylene sulfide and polyamide. The vacuum interrupter 2, excluding the moving end, the second outgoing conductive arm 4, the first outgoing conductive arm 3 and the bushing are cast into a sealed whole, which solves the problems of poor sealing and large space occupied by using a copper busbar to connect the first outgoing conductive arm 3 to the bushing in traditional technology.

[0032] In the prior art, such sealed poles are mostly cast with epoxy resin as the insulating material, which is not environmentally friendly. In this embodiment, polycarbonate, polyphenylene sulfide and polyamide, commonly known as nylon, are selected to mix and generate a new composite insulating material with strong mechanical properties, wear resistance, corrosion resistance and good molding processability. After filling and toughening modification, its performance is greatly enhanced, and its electrical and mechanical properties fully meet the insulation requirements of insulating switchgear; it also has the following characteristics: light weight, short production cycle, long life (up to 30 years), small internal stress after processing, and recyclable and reusable; the overall molding process adopts injection molding process, which is simple and has low production cost; the material itself is non-toxic, there is no irritating odor in the manufacturing process, and it does not affect the environment. The product can be recycled and reproduced, which meets the national requirements for sustainable development.

[0033] In a second aspect, the present application also provides a ring main unit comprising the above-mentioned sealed pole.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A sealed pole, characterized in that: It includes a shell, a vacuum interrupter arranged in the shell, a first outgoing conductive arm and a second outgoing conductive arm. The first outgoing conductive arm is fixedly connected to the static end of the vacuum interrupter, and the moving end of the vacuum interrupter is connected to the second outgoing conductive arm through a flexible connection. The outgoing end of the first outgoing conductive arm is arranged in a connecting sleeve. The shell, the vacuum interrupter, the first outgoing conductive arm, the second outgoing conductive arm and the sleeve are integrally formed. The connecting sleeve is used to connect the sealed pole to the cable connector of the gas box.

2. The sealed pole according to claim 1, characterized in that: The movable end of the vacuum interrupter comprises a movable conductive rod, a conductive clamp is provided below the movable conductive rod, and the movable conductive rod is connected to the flexible connection through the conductive clamp.

3. The sealed pole according to claim 1, characterized in that: The connecting sleeve comprises a C-shaped sleeve, a threaded hole is provided at the end of the C-shaped sleeve, and the cable connector is connected to the C-shaped sleeve by locking with a second bolt and the threaded hole.

4. The sealed pole according to claim 1, characterized in that: The static end of the vacuum interrupter is connected to the first outgoing conductive arm through a first bolt.

5. The sealed pole according to claim 1, characterized in that: The first outgoing conductive arm comprises a conductive copper rod, one end of which is connected to the static end of the vacuum interrupter, and the other end of which is provided with a connecting sleeve.

6. The sealed pole according to claim 2, characterized in that: A driving mechanism is connected to the lower side of the movable conductive rod via an insulating pull rod, and the driving mechanism is used to drive the movable conductive rod to slide.

7. The sealed pole according to claim 1, characterized in that: The shell is cast by mixing polycarbonate, polyphenylene sulfide and polyamide, and the vacuum interrupter part except the moving end, the first outlet conductive arm, the second outlet conductive arm and the bushing are cast into a sealed whole.

8. The sealed pole according to claim 2, characterized in that: The flexible connection adopts a conductive belt, one end of which is connected to the conductive clamp, and the other end is connected to the second outgoing conductive arm.

9. A ring main unit, characterized in that: The invention comprises the sealed pole according to any one of claims 1 to 8.

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