Outdoor solid-sealed polar pole

Abstract

The invention provides an outdoor solid-sealed polar pole, which comprises an insulating shell, and an arc extinguish chamber, a static end wire outlet seat, a moving end wire outlet seat, a current transformer and a transformer bracket which are fixedly sealed in the insulating shell, the static end of the arc extinguish chamber is connected with the static end wire outlet seat, the moving end of the arc extinguish chamber is connected with the moving end wire outlet seat through flexible connection, and the current transformer bracket is fixedly sealed in the insulating shell. The current transformer is sleeved on the moving end wire outlet seat and is used for sensing and generating current, and the transformer support is connected with the current transformer so as to support the current transformer before solid sealing; a resistance layer is arranged on the mutual inductor support, two leading-out ends of the current mutual inductor are respectively connected with two ends of the resistance layer, and two ends of the resistance layer are respectively led out of the insulating shell through leading-out wires; therefore, voltage sampling can be carried out; devices such as a mounting box do not need to be additionally arranged, and cost is effectively reduced; the resistive layer on the mutual inductor support is also wrapped by the insulating shell and is not affected by the external environment, and the reliability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum circuit breaker equipment, and particularly relates to an outdoor solid-sealed pole column. Background Art

[0002] A pole column is formed by embedding a vacuum interrupter and conductive parts related to the circuit breaker into a solid insulating material such as epoxy resin that is easy to cure, so that the entire circuit breaker pole column becomes an integral component.

[0003] With the development of the smart grid industry, the construction of smart grids has put forward new requirements for the miniaturization, high reliability, automation, and intelligence of substation switches. To monitor outdoor grid information, existing outdoor solid-sealed pole columns generally integrate current transformers for outputting induced current. When this device needs to sample voltage signals, the current transformer requires a sampling resistor to convert the current signal into a voltage signal.

[0004] Currently, the most common method is to externally connect a fixed-value external resistor to the outdoor solid-sealed pole column, and sample the voltage value of the external resistor when current passes through it. The externally connected external resistor has certain drawbacks: such as the need to add an installation box, which increases the cost significantly, and the external connection method is vulnerable to the influence of the external environment (such as moisture erosion), resulting in poor reliability. Summary of the Invention

[0005] Therefore, to solve the above problems, the present invention provides an outdoor solid-sealed pole column.

[0006] To achieve the above object, the technical solution provided by the present invention is as follows:

[0007] An outdoor solid-sealed pole column includes an insulating housing, and a vacuum interrupter, a static terminal outlet seat, a moving terminal outlet seat, a current transformer, and a transformer support that are solid-sealed in the insulating housing. The static end of the vacuum interrupter is connected to the static terminal outlet seat, the moving end of the vacuum interrupter is connected to the moving terminal outlet seat through a flexible connection, the current transformer is sleeved on the moving terminal outlet seat for inducing current, and the transformer support is connected to the current transformer to support the current transformer before solid-sealing; a resistance layer is provided on the transformer support, two lead-out ends of the current transformer are respectively connected to both ends of the resistance layer, and both ends of the resistance layer are also respectively led out to the outside of the insulating housing through lead wires.

[0008] Further, the transformer support has a support column, and the resistance layer is provided on the support column.

[0009] Further, the resistance layer is arranged in a non-spiral structure on the support column.

[0010] Further, the resistance layer extends and is arranged in a "bow" shape or an "S" shape in the axial direction of the support column.

[0011] Further, the current transformer support is a heat-conducting support.

[0012] Further, the current transformer support is a metal support, a heat-conducting insulating layer is arranged on the outer periphery of the current transformer support, and the resistance layer is arranged on the heat-conducting insulating layer.

[0013] Further, the heat-conducting insulating layer is an insulating enamel layer.

[0014] Further, two wiring terminals are arranged on the insulating housing, and the lead wires connecting the two ends of the resistance layer are respectively connected to the two wiring terminals.

[0015] Further, the wiring terminals are fixed on the current transformer support.

[0016] Further, the two ends of the current transformer are respectively connected to the two wiring terminals through wires, the middle section of the wire is connected to the resistance layer through a branch wire, the wire section between the current transformer and the resistance layer is the lead-out end of the current transformer, and the wire section between the resistance layer and the wiring terminal is the lead wire.

[0017] Through the technical solution provided by the present invention, the following beneficial effects are achieved:

[0018] 1. A resistance layer is arranged on the original current transformer support, the two lead-out ends of the current transformer are respectively connected to the two ends of the resistance layer, and the two ends of the resistance layer are also respectively led out to the outside of the insulating housing through lead wires; in this way, voltage sampling can be carried out; there is no need to additionally install devices such as an installation box, effectively reducing costs; the resistance layer on the current transformer support is also covered by the insulating housing, not affected by the external environment, and has high reliability.

[0019] 2. The resistance layer is arranged in a non-spiral structure on the support column, and no magnetic field will be generated when the current flows through the resistance layer, thus not affecting the sampling accuracy.

[0020] 3. The current transformer support is a heat-conducting support, and the heat generated by the resistance layer can be conducted out through the current transformer support, realizing timely heat dissipation, and further ensuring the accuracy and reliability of the adoption. Description of the Drawings

[0021] Figure 1 Shown is the external view schematic diagram of the outdoor solid-sealed pole column in the embodiment;

[0022] Figure 2 Shown is the cross-sectional view of the outdoor solid-sealed pole column in the embodiment;

[0023] Figure 3The figure shows a schematic structural diagram of an outdoor cast pole after hiding its insulating housing in an embodiment;

[0024] Figure 4 The figure shows a schematic assembly structural diagram of a current transformer, a resistance layer and a transformer support in an embodiment;

[0025] Figure 5 As shown Figure 4 A partial enlarged schematic diagram of the shown structure. Detailed implementation manners

[0026] To further illustrate each embodiment, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0027] In the description of the present invention, the orientation or positional relationships such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientation or positional relationships shown in the drawings, only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0028] Now, the present invention will be further described in conjunction with the accompanying drawings and specific implementation manners.

[0029] Refer to Figures 1 to 5 As shown, an outdoor cast pole provided in this embodiment includes an insulating housing 10 and an arc extinguishing chamber 11, a static terminal outlet seat 12, a moving terminal outlet seat 13, a current transformer 20 and a transformer support 30 sealed in the insulating housing 10. The static end of the arc extinguishing chamber 11 is connected to the static terminal outlet seat 12, and the moving end of the arc extinguishing chamber 11 is connected to the moving terminal outlet seat 13 through a flexible connection 14. Among them, the moving end of the arc extinguishing chamber 11 is also connected with an insulating pull rod 15, and the moving end of the arc extinguishing chamber 11 is driven to perform opening and closing operations through the insulating pull rod 15. The current transformer 20 is sleeved on the moving terminal outlet seat 13 for inducing current, and the transformer support 30 is connected to the current transformer 20 to support the current transformer 20 before casting; that is, before the insulating housing 10 is cast and formed, the current transformer 20 is supported by the transformer support 30. After that, the insulating housing 10 is integrally formed through a casting process, so that the insulating housing 10 fixes the arc extinguishing chamber 11, the static terminal outlet seat 12, the moving terminal outlet seat 13, the current transformer 20 and the transformer support 30 together.

[0030] Among them, a resistance layer 40 is provided on the mutual inductor support 30. Two lead-out ends 211 of the current mutual inductor 20 are respectively connected to both ends of the resistance layer 40, and both ends of the resistance layer 40 are also respectively led out to the outside of the insulating housing 10 through lead-out wires 212. In this way, the current generated by the current mutual inductor 20 flows through the resistance layer 40 through the lead-out ends 211, and the voltage sampling is completed through the lead-out wires 212 connected to both ends of the external resistance layer 40. There is no need to additionally install devices such as an installation box, effectively reducing costs; the resistance layer 40 on the mutual inductor support 30 is also covered by the insulating housing 10, not affected by the external environment, and has high reliability. At the same time, since the resistance value of the resistance layer 40 is known, the current value of the current mutual inductor 20 can also be directly obtained.

[0031] Two wiring terminals 23 are provided on the insulating housing 10, that is, the two wiring terminals 23 are also embedded in the insulating housing 10. The lead-out wires 212 connecting both ends of the resistance layer 40 are respectively connected to the two wiring terminals 23, and the external connection ports of the wiring terminals 23 are exposed for connecting to external sampling devices; simpler wiring operations are realized.

[0032] The wiring terminals 23 are fixed on the mutual inductor support 30, so that the wiring terminals 23 are also fixed through the mutual inductor support 30 before potting, and the positioning is better. Specifically, in this embodiment, the mutual inductor support 30 includes a horizontally arranged bottom plate 31 and a support column 32 connected to the bottom plate 31 and extending upward. The top of the support column 32 supports the current mutual inductor 20; the two wiring terminals 23 are fixed on the bottom plate 31 and are located on both sides of the support column 32.

[0033] Among them, the resistance layer 40 is provided on the support column 32; both ends of the current mutual inductor 30 are respectively connected to the two wiring terminals 23 through wires 21, that is, the two wires 21 are located on both sides of the support column 32 and are parallel to the support column 32; the middle section of the wire 21 is connected to the resistance layer 40 through a branch wire 22. For example, the middle section of the left wire 21 is connected to the first end of the resistance layer 40 through a branch wire 22, and the middle section of the right wire 21 is connected to the second end of the resistance layer 40 through another branch wire 22; the wire section between the current mutual inductor 20 and the resistance layer 40 is the lead-out end 211 of the current mutual inductor 20, and the wire section between the resistance layer 40 and the wiring terminal 23 is the lead-out wire 212. A simple layout is realized, and the structural design is ingenious.

[0034] Furthermore, since the resistance layer 40 is disposed on the support pillar 32 and the length of the resistance layer 40 is relatively long, it is difficult for the resistance layer 40 to be arranged in a straight-line extension manner on the support pillar 32. Therefore, the outer peripheral surface of the support pillar 32 can be fully utilized for layout extension in a back-and-forth manner. For example, in this embodiment, the resistance layer 40 extends and is arranged in a "bow" shape in the axial direction of the support pillar 32, that is, the resistance layer 40 extends downward from top to bottom on the support pillar 32 in a "bow" shape. The full layout of the resistance layer 40 is achieved on the limited length of the support pillar 32, and this layout method makes the flowing directions of the current in the upper and lower sections of the resistance layer 40 opposite, and the generated magnetic fields cancel each other out; effectively avoiding the influence of the generated magnetic field on the sampling accuracy. The arrangement method of this "bow" shape is one of the most preferred arrangement methods. Of course, in other embodiments, it may also be an arrangement structure with an "S" shape or a "<" shape for back-and-forth bending, etc.; it should be noted that it is necessary to avoid designing it in a spiral shape on the outer periphery of the support pillar 32, that is, the resistance layer 40 is arranged in a non-spiral structure on the support pillar 32, and more preferably, it is the "bow" shape extension arrangement in this embodiment.

[0035] The current transformer support 30 is a heat-conducting support; the heat generated by the resistance layer 40 can be conducted out through the current transformer support 30. For example, connection terminals 33 are assembled on the bottom plate 31 of the current transformer support 30 and are connected to an external support through the connection terminals 33, and at the same time, the heat is conducted to the outside; timely heat dissipation is achieved, and the accuracy and reliability of the adoption are further ensured.

[0036] Specifically, the current transformer support 30 is a metal support, such as an aluminum support or an iron support, etc. The metal support has good hardness and strong heat conductivity; an insulation design is adopted between the current transformer support 30, the resistance layer 40, and the wiring terminal 23. In this embodiment, a heat-conducting insulation layer 50 (such as an insulating enamel layer) is disposed on the outer periphery of the support pillar 32, and the resistance layer 40 is disposed on the heat-conducting insulation layer to achieve insulation and heat-conducting cooperation with the current transformer support 30.

[0037] Although the present invention has been specifically shown and described in combination with preferred implementation modes, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them fall within the protection scope of the present invention.

Claims

1. An outdoor sealed pole, comprising an insulating shell and an arc extinguishing chamber, a static end outlet seat, a dynamic end outlet seat, a current transformer and a transformer bracket sealed in the insulating shell, wherein the static end of the arc extinguishing chamber is connected to the static end outlet seat, the dynamic end of the arc extinguishing chamber is connected to the dynamic end outlet seat through a flexible connection, the current transformer is sleeved on the dynamic end outlet seat for induction of current, and the transformer bracket is connected to the current transformer to support the current transformer before sealing; characterized in that: A resistance layer is arranged on the transformer support, and two lead-out ends of the current transformer are respectively connected to two ends of the resistance layer, and the two ends of the resistance layer are also respectively led out of the insulating shell through lead-out wires.

2. The outdoor sealed pole according to claim 1, characterized in that: The transformer support has a support column, and the resistance layer is arranged on the support column.

3. The outdoor sealed pole according to claim 2, characterized in that: The resistance layer is arranged on the support column in a non-helical structure.

4. The outdoor sealed pole according to claim 3, characterized in that: The resistance layer is arranged in a "bow" or "S" shape in the axial direction of the support column.

5. The outdoor sealed pole according to any one of claims 1 to 4, characterized in that: The mutual inductor bracket is a heat-conducting bracket.

6. The outdoor sealed pole according to claim 5, characterized in that: The transformer bracket is a metal bracket, a heat-conducting insulating layer is arranged on the outer periphery of the transformer bracket, and the resistance layer is arranged on the heat-conducting insulating layer.

7. The outdoor sealed pole according to claim 6, characterized in that: The heat-conducting insulating layer is an insulating enamel layer.

8. The outdoor sealed pole according to claim 1, characterized in that: The insulating shell is provided with two wiring terminals, and the lead wires connecting the two ends of the resistance layer are respectively connected to the two wiring terminals.

9. The outdoor sealed pole according to claim 8, characterized in that: The connecting terminal is fixed on the transformer bracket.

10. The outdoor sealed pole according to claim 8, characterized in that: The two ends of the current transformer are connected to two terminals through wires respectively, the middle section of the wire is connected to the resistance layer through a branch line, the wire section between the current transformer and the resistance layer is the lead-out end of the current transformer, and the wire section between the resistance layer and the terminal is the lead-out line.

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