Outdoor solid-sealed polar pole

Abstract

The utility model 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 support 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 support 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 utility model relates to vacuum circuit breaker equipment technical field, concretely relates to an outdoor fixed sealing pole. BACKGROUND

[0002] The pole is formed by embedding the vacuum arc extinguishing chamber and the conductive parts related to the circuit breaker into the epoxy resin which is easy to solidify and is solid insulation material, so that the pole of the circuit breaker becomes a whole component.

[0003] With the development of smart grid industry, the smart grid construction puts forward new requirements for the miniaturization, high reliability, automation and intelligence of the switch of the transformer substation. In order to monitor the outdoor power grid information, the existing outdoor fixed sealing pole generally integrates a current transformer for outputting the induced current. If the device needs to sample the voltage signal, the current transformer needs a sampling resistor to convert the current signal into a voltage signal.

[0004] The most commonly used way at present is to externally connect a fixed resistance external resistance on the outdoor fixed sealing pole, and the voltage value of the external resistance is sampled when the current passes through the external resistance. The externally connected external resistance has certain drawbacks: if a mounting box is needed, the cost is increased, and the externally connected mode is easily affected by the external environment (such as water vapor erosion) and has poor reliability. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides an outdoor fixed sealing pole to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the technical scheme as follows:

[0007] An outdoor fixed sealing pole, comprising an insulation shell, an arc extinguishing chamber, a static end terminal block, a dynamic end terminal block, a current transformer and a transformer support fixed in the insulation shell, the static end of the arc extinguishing chamber is connected with the static end terminal block, the dynamic end of the arc extinguishing chamber is connected with the dynamic end terminal block through a flexible connection, the current transformer is sleeved on the dynamic end terminal block for generating current, the transformer support is connected with the current transformer to support the current transformer before being fixed; a resistance layer is arranged on the transformer support, two lead-out ends of the current transformer are connected with two ends of the resistance layer respectively, and the two ends of the resistance layer are led out to the outside of the insulation shell through lead-out wires respectively.

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

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

[0010] Further, the resistance layer extends in an "arch" shape or an "S" shape in the axial direction of the support column.

[0011] Further, the mutual inductor support is a heat-conducting support.

[0012] Further, the mutual inductor support is a metal support, and a heat-conducting insulation layer is arranged on the outer periphery of the mutual inductor support, and the resistance layer is arranged on the heat-conducting insulation layer.

[0013] Further, the heat-conducting insulation layer is an insulation glaze layer.

[0014] Further, two wiring terminals are arranged on the insulation shell, and the outgoing wires connected to the two ends of the resistance layer are respectively connected to the two wiring terminals.

[0015] Further, the wiring terminals are fixed on the mutual inductor 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 wires is connected to the resistance layer through a branch wire, the wire section between the current transformer and the resistance layer is the outgoing end of the current transformer, and the wire section between the resistance layer and the wiring terminal is the outgoing wire.

[0017] The technical scheme provided by the utility model has the following beneficial effects:

[0018] 1. The resistance layer is arranged on the original mutual inductor support, the two outgoing 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 respectively led out to the outside of the insulation shell through outgoing wires; in this way, voltage sampling can be performed; no additional installation box or other devices need to be added, thereby effectively reducing the cost; the resistance layer on the mutual inductor support is also covered by the insulation shell and is not affected by the external environment, and the reliability is high.

[0019] 2. The resistance layer is arranged in a non-spiral structure on the support column, and no magnetic field is generated when current flows through the resistance layer, thereby affecting the sampling accuracy.

[0020] 3. The mutual inductor support is a heat-conducting support, the heat generated by the resistance layer can be conducted out through the mutual inductor support, heat dissipation is realized in time, and the accuracy and reliability of sampling are further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Fig. 1 shows the appearance of an outdoor solid-sealed pole in an embodiment;

[0022] Figure 2 Fig. 2 shows a sectional view of the outdoor solid-sealed pole in the embodiment;

[0023] Figure 3The structural schematic diagram of the outdoor sealed pole after hiding the insulation shell in the embodiment is shown.

[0024] Figure 4 The assembly structural schematic diagram of the current transformer, the resistance layer and the transformer support in the embodiment is shown.

[0025] Figure 5 The structural schematic diagram of the outdoor sealed pole is shown. Figure 4 The partial enlarged schematic diagram of the structure is shown. DETAILED DESCRIPTION

[0026] To further illustrate the embodiments, the utility model provides the accompanying drawings. These accompanying drawings are part of the utility model disclosure, which mainly serves to illustrate the embodiments, and can be combined with the related description of the specification to explain the operating principle of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementations and the advantages of the utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0027] In the description of the utility model, the terms "upper", "lower", "left", "right", "front", "back" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the utility model.

[0028] The utility model will be further described in conjunction with the drawings and specific embodiments.

[0029] Referring to Figures 1 to 5 It is shown that the outdoor sealed pole provided by the embodiment includes an insulation shell 10, an arc-extinguishing chamber 11, a static end terminal block 12, a moving end terminal block 13, a current transformer 20 and a transformer support 30 sealed in the insulation shell 10, the static end of the arc-extinguishing chamber 11 is connected to the static end terminal block 12, the moving end of the arc-extinguishing chamber 11 is connected to the moving end terminal block 13 through a flexible connection 14, wherein the moving end of the arc-extinguishing chamber 11 is also connected to an insulation pull rod 15, and the moving end of the arc-extinguishing chamber 11 is driven to operate by opening and closing through the insulation pull rod 15. The current transformer 20 is sleeved on the moving end terminal block 13 for inductive current generation, and the transformer support 30 is connected to the current transformer 20 to support the current transformer 20 before sealing; that is, before the insulation shell 10 is sealed and formed, the current transformer 20 is supported by the transformer support 30, and then the insulation shell 10 is integrally formed by a sealing process, so that the insulation shell 10 fixes the arc-extinguishing chamber 11, the static end terminal block 12, the moving end terminal block 13, the current transformer 20 and the transformer support 30 together.

[0030] The current transformer support 30 is provided with a resistance layer 40, two outgoing ends 211 of the current transformer 20 are connected to two ends of the resistance layer 40 respectively, and two ends of the resistance layer 40 are also connected to the outside of the insulating shell 10 through outgoing lines 212 respectively. In this way, the current generated by the current transformer 20 flows through the resistance layer 40 through the outgoing ends 211, and the voltage sampling is completed through the outgoing lines 212 connected to two ends of the external resistance layer 40. No additional installation box or other devices are needed, effectively reducing the cost; the resistance layer 40 on the current transformer support 30 is also covered by the insulating shell 10 and is not affected by the external environment, and the reliability is high. At the same time, since the resistance value of the resistance layer 40 is known, the current value of the current transformer 20 can also be directly obtained.

[0031] The insulating shell 10 is provided with two wiring terminals 23, that is, the two wiring terminals 23 are also embedded on the insulating shell 10, the outgoing lines 212 connected to two ends of the resistance layer 40 are connected to the two wiring terminals 23 respectively, and the external connection ports of the wiring terminals 23 are exposed and used for external connection of sampling equipment; more convenient wiring operation is realized.

[0032] The wiring terminals 23 are fixed on the current transformer support 30, so that the wiring terminals 23 are also fixed through the current transformer support 30 before being fixed and sealed, and the positioning is better. Specifically, in the embodiment, the current transformer support 30 includes a horizontal 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 transformer 20, and the two wiring terminals 23 are fixed on the bottom plate 31 and located on both sides of the support column 32.

[0033] The resistance layer 40 is arranged on the support column 32; two ends of the current transformer 30 are connected to the two wiring terminals 23 through two wires 21, that is, the two wires 21 are parallel to the support column 32 and located on both sides of the support column 32; the middle sections of the two wires 21 are connected to the resistance layer 40 through a branch line 22, for example, the middle section of the wire 21 on the left is connected to the first end of the resistance layer 40 through the branch line 22, and the middle section of the wire 21 on the right is connected to the second end of the resistance layer 40 through another branch line 22; the wire section between the current transformer 20 and the resistance layer 40 is the outgoing end 211 of the current transformer 20, and the wire section between the resistance layer 40 and the wiring terminal 23 is the outgoing line 212. A simple layout is realized, and the structure design is ingenious.

[0034] Further, since the resistance layer 40 is arranged on the support column 32, and the length of the resistance layer 40 is relatively long, it is difficult to arrange the resistance layer 40 in a straight line on the support column 32, and therefore, the outer circumferential surface of the support column 32 can be fully utilized for the back-and-forth arrangement and extension. In the embodiment, the resistance layer 40 is arranged in an "arch" shape in the axial direction of the support column 32, that is, the resistance layer 40 extends from top to bottom on the support column 32 in an "arch" shape. The resistance layer 40 is arranged on the support column 32 in a full-length manner, and the arrangement manner makes the current flow in opposite directions in the upper and lower sections of the resistance layer 40, and the generated magnetic fields are offset, thereby effectively avoiding the influence of the generated magnetic field on the sampling accuracy. The arrangement manner of the "arch" shape is one of the most preferred arrangement manners, and of course, in other embodiments, the arrangement manner can be an "S" shape or a "<" shape, and the like. It should be noted that the resistance layer 40 is arranged in a non-spiral shape on the support column 32, and more preferably, the resistance layer 40 is arranged in the "arch" shape in the embodiment.

[0035] The transformer support 30 is a heat-conducting support, and the heat generated by the resistance layer 40 can be conducted out through the transformer support 30. For example, the bottom plate 31 of the transformer support 30 is provided with a connecting terminal 33, which is connected to an external support through the connecting terminal 33, and at the same time, the heat is conducted to the outside, thereby achieving timely heat dissipation and further ensuring the accuracy and reliability of the sampling.

[0036] Specifically, the transformer support 30 is a metal support, such as an aluminum support or an iron support, and the metal support has good hardness and strong heat conductivity. The transformer support 30 is insulated from the resistance layer 40 and the connecting terminal 23. In the embodiment, a heat-conducting insulating layer 50 (such as an insulating glaze layer) is arranged on the outer periphery of the support column 32, and the resistance layer 40 is arranged on the heat-conducting insulating layer, thereby achieving the insulation and heat-conducting cooperation between the transformer support 30 and the resistance layer 40.

[0037] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, those skilled in the art should understand that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all the changes are within the protection scope of the utility model.

Claims

1. An outdoor dead tank pole, comprising an insulating shell and a sealed arc-extinguishing chamber, a static terminal terminal block, a moving terminal terminal block, a current transformer and a transformer support, the static terminal of the arc-extinguishing chamber is connected to the static terminal terminal block, the moving terminal of the arc-extinguishing chamber is connected to the moving terminal terminal block through a flexible connection, the current transformer is sleeved on the moving terminal terminal block for inductive current generation, and the transformer support is connected to the current transformer to support the current transformer before sealing; characterized in that: The mutual inductor support is provided with a resistance layer, two ends of the resistance layer are connected with two lead-out ends of the current transformer respectively, and the two ends of the resistance layer are further led out to outside of the insulating shell through lead-out wires respectively.

2. The outdoor deadfront pole as claimed in claim 1, characterized in that: The mutual inductor support has a support column, and the resistance layer is arranged on the support column.

3. The outdoor deadfront pole as claimed in claim 2, characterized in that: The resistance layer is arranged in a non-spiral structure on the support column.

4. The outdoor deadfront pole as claimed in claim 3, characterized in that: The resistance layer is arranged in an "arch" shape or an "S" shape in the axial direction of the support column.

5. The outdoor deadfront pole as claimed in any one of claims 1 to 4, characterized in that: The mutual inductor support is a heat-conducting support.

6. The outdoor deadfront pole as claimed in claim 5, characterized in that: The mutual inductor support is a metal support, the mutual inductor support is provided with a heat-conducting insulating layer on the outer periphery, and the resistance layer is arranged on the heat-conducting insulating layer.

7. The outdoor deadfront pole as claimed in claim 6, characterized in that: The heat-conducting insulating layer is an insulating glaze layer.

8. The outdoor deadfront pole as recited in claim 1, wherein: The insulating shell is provided with two wiring terminals, and the lead-out wires connected with the two ends of the resistance layer are connected with the two wiring terminals respectively.

9. The outdoor deadfront pole as claimed in claim 8, characterized in that: The wiring terminals are fixed on the mutual inductor support.

10. The outdoor deadfront pole as claimed in claim 8, characterized in that: Two ends of the current transformer are connected with the two wiring terminals through wires respectively, a middle section of the wires is connected with the resistance layer through a branch wire, a wire section between the current transformer and the resistance layer is a lead-out end of the current transformer, and a wire section between the resistance layer and the wiring terminal is the lead-out wire.

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