Pole and circuit breaker comprising same

Abstract

The utility model provides a pole and a circuit breaker comprising the same. The pole comprises an upper outgoing line terminal and a lower outgoing line terminal, a lower outgoing line terminal; the arc extinguish chamber is arranged between the upper wire outlet terminal and the lower wire outlet terminal in the first direction; and a plurality of flexible connections which are electrically connected with the arc extinguish chamber and the lower outgoing line terminal and are overlapped side by side.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pole and circuit breaker including the pole. BACKGROUND

[0002] The pole is a core component of the circuit breaker product, and plays a key role in the insulation performance of the circuit breaker. For a large-current pole, the structure of the soft connection will directly affect the diameter of the pole at the outgoing terminal, thereby affecting the insulation performance between the poles and between the pole and the back plate of the cabinet.

[0003] When the circuit breaker is applied in high-altitude areas, the electric field concentration problem at the lower end of the pole is particularly prominent due to the influence of high altitude, wind and sand, humidity and other harsh environments, which is easy to cause destructive discharge and damage the pole. In addition, the market has increasingly high requirements for the altitude of switchgear, and the circuit breaker is the most important component in switchgear. Therefore, when designing, the insulation performance requirements of high altitude on the product need to be considered first. Therefore, improving the insulation performance of the pole and reducing insulation aging are the top priority in designing high-altitude circuit breakers.

[0004] A large-current pole usually includes multiple soft connections to transmit large current. In the prior art, the multiple soft connections are usually arranged on both sides in front and back or arranged in a U shape, or a sliding structure is used instead of the soft connection. The first two schemes will result in an excessively large diameter of the outgoing terminal, and the latter scheme has a high cost and will affect the closing and opening speed. SUMMARY

[0005] Therefore, in view of the above problems, the utility model provides a pole, which comprises: an upper outgoing terminal; a lower outgoing terminal; an arc-extinguishing chamber arranged between the upper outgoing terminal and the lower outgoing terminal in a first direction; and a plurality of soft connections electrically connected to the arc-extinguishing chamber and the lower outgoing terminal and overlapping each other side by side.

[0006] In an embodiment, the plurality of soft connections overlap in the first direction and are spaced apart from each other.

[0007] In an embodiment, the plurality of soft connections are parallel to each other.

[0008] In an embodiment, the lower outgoing terminal is formed as a hollow structure, and the plurality of soft connections are located within the hollow structure.

[0009] In an embodiment, a first end of each of the plurality of soft connections is connected to an inner side wall of the lower outgoing terminal, and a second end of each of the plurality of soft connections is connected to a lower end of the arc-extinguishing chamber.

[0010] In an embodiment, the inner side wall of the lower outgoing terminal includes a stepped portion, and the first end of each of the plurality of soft connections is connected to the stepped portion.

[0011] In an embodiment, the first end of each of the plurality of flexible connections is secured to the surface of the stepped portion facing the first direction by a fastener.

[0012] In an embodiment, the arc extinguishing chamber includes a moving conductor rod, the pole column further includes a stud bolt connected to the moving conductor rod, and the second end of each of the plurality of flexible connections is secured to the moving conductor rod by the stud bolt.

[0013] In an embodiment, each of the plurality of flexible connections includes copper.

[0014] In an embodiment, the pole column is a potted pole column cast from a thermoset material, and the upper outgoing terminal and the arc extinguishing chamber are embedded in the thermoset material.

[0015] In an embodiment, the thermoset material is an epoxy resin.

[0016] The utility model further provides a circuit breaker, the circuit breaker includes the pole column.

[0017] The pole column according to the utility model can reduce the diameter of the pole column at the lower outgoing terminal by the side-by-side and overlapping flexible connections, increase the distance between phases, reduce the electric field intensity of the pole column to the ground and the electric field intensity between phases, reduce the electric field concentration of the epoxy surface at the lower outgoing terminal, thereby improving the insulation performance of the pole column and delaying the aging of the pole column. In addition, the pole column according to the utility model includes flexible connections that are easy to install. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other features and advantages of the exemplary embodiments of the utility model will become more apparent from the following detailed description with reference to the attached drawings, and the description and drawings are for exemplary purposes only and do not limit the scope of the utility model in any way, in which:

[0019] Figure 1 is a perspective view showing a pole column according to an embodiment of the utility model;

[0020] Figure 2 is a cross-sectional view showing a pole column according to an embodiment of the utility model;

[0021] Figure 3 is a partial perspective view showing a pole column according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings of the embodiments of the present disclosure. The same reference signs in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0023] Compared with the embodiments shown in the drawings, the feasible implementation solutions within the protection scope of the present disclosure can have fewer components, have other components not shown in the drawings, have different components, have components arranged differently, or have components connected differently, etc. In addition, two or more components in the drawings can be implemented in a single component, or a single component shown in the drawings can be implemented as multiple separate components.

[0024] Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meanings understood by those of ordinary skill in the art to which the present disclosure belongs. The use of "first", "second", and similar words in the specification and claims of the present patent application does not represent any order, quantity, or importance, but is only used to distinguish different components. When the number of components is not specified, the number of components can be one or more; similarly, "one", "the", "said", and similar words do not necessarily represent a quantity limitation. The words "including" or "containing" and similar words mean that the elements or objects before the words encompass the elements or objects listed after the words and their equivalents, without excluding other elements or objects. The words "mounting", "setting", "connecting", or "connected" and similar words are not limited to physical or mechanical mounting, setting, or connecting, but can include electrical mounting, setting, or connecting, whether direct or indirect. "Up", "down", "left", "right", and the like are only used to represent the relative positional relationship of the device when in use or the positional relationship shown in the drawings, and when the absolute position of the described object changes, the relative positional relationship can also change accordingly.

[0025] Figure 1 is a perspective view showing a pole 10 according to an embodiment of the present application. Figure 2 is a cross-sectional view showing a pole 10 according to an embodiment of the present application. Figure 3 is a partial perspective view showing a pole 10 according to an embodiment of the present application.

[0026] According to an embodiment of the present application, the pole 10 can include an upper outgoing terminal 110, a lower outgoing terminal 140, an arc-extinguishing chamber 120 disposed between the upper outgoing terminal 110 and the lower outgoing terminal 140 in the first direction D1, and a plurality of flexible connections 130 electrically connecting the arc-extinguishing chamber 120 and the lower outgoing terminal 140 and arranged side by side with each other. When the pole 10 is in operation, the current introduced into the pole 10 can flow through the upper outgoing terminal 110, the arc-extinguishing chamber 120, the flexible connections 130, and the lower outgoing terminal 140 in this order, and then flow out of the pole 10. In the present application, the plurality of flexible connections 130 are arranged side by side and overlapping each other, which can reduce the diameter of the lower outgoing terminal 140, increase the distance between phases, and reduce the electric field strength of the pole 10 to the ground and the electric field strength between phases, as compared with the front and rear arrangement or the U-shaped arrangement. Although Figure 2 and Figure 3 only two flexible connections are shown, the present application is not limited thereto, and the pole 10 can include more flexible connections arranged side by side and overlapping each other as needed.

[0027] According to an embodiment of the present application, the plurality of flexible connections 130 can overlap each other and be spaced apart from each other in the first direction D1. In addition, the plurality of flexible connections 130 can be parallel to each other.

[0028] According to an embodiment of the present application, as shown in Figure 2 and Figure 3 the lower outgoing terminal 140 can be formed in a hollow structure, and the plurality of flexible connections 130 can be located inside the hollow structure. Therefore, the lower outgoing terminal 140 can surround the plurality of flexible connections 130 to serve as a shielding structure, so that the electric field inside the pole 10 can be purified and the overall insulation performance of the pole 10 can be improved. Figure 2 and Figure 3 the lower outgoing terminal 140 formed in a hollow structure as shown in

[0029] According to an embodiment of the present application, as shown in Figure 2 and Figure 3 the first end 131 of each of the plurality of flexible connections 130 can be connected to the inner side wall of the lower outgoing terminal 140 formed in a hollow structure, and the second end 132 of each of the plurality of flexible connections 130 can be connected to the lower end of the arc-extinguishing chamber 120, so as to electrically connect the arc-extinguishing chamber 120 to the lower outgoing terminal 140.

[0030] According to an embodiment of the present application, the inner side wall of the lower outgoing terminal 140 formed as a hollow structure can include a stepped portion 143, and the first end 131 of each of the plurality of flexible connections 130 can be connected to the stepped portion 143. The stepped portion 143 can include a first surface 141 facing the first direction D1 and a second surface 142 intersecting the first surface. According to an embodiment of the present application, the first end 131 of each of the plurality of flexible connections 130 can be connected to the first surface 141 of the stepped portion by a fastener 150. The fastener 150 can include a screw as shown in FIGS. 7 and 8, but the present application is not limited thereto, and the fastener can include any form that can fix the flexible connection, such as a conductive adhesive, etc. Since one end of the flexible connection 130 can be fixed to the first surface 141 of the stepped portion 143 of the lower outgoing terminal 140, the bending of the flexible connection 130 can be reduced to shorten the extension length of the flexible connection 130, so that the circuit resistance can be reduced and the manufacturing cost of the pole 10 can be reduced. In addition, the flexible connection 130 can be pre-mounted on the lower outgoing terminal 140 through the upper opening of the lower outgoing terminal 140 before the arc-extinguishing chamber 120 is mounted, so that the installation of the flexible connection 130 becomes easy. Figure 2 and Figure 3

[0031] According to an embodiment of the present application, the arc-extinguishing chamber 120 can include a movable conducting rod 121, and the pole 10 can further include a stud bolt 160 connected to the movable conducting rod 121, and the second end 132 of each of the plurality of flexible connections 130 can be connected to the movable conducting rod 121 by the stud bolt 160. One end of the stud bolt 160 can be inserted into the movable conducting rod 121, thereby fixing the plurality of flexible connections 130 to the movable conducting rod 121.

[0032] According to an embodiment of the present application, each of the plurality of flexible connections 130 can include copper. The flexible connection 130 can include a copper bar flexible connection or a tinned copper braid flexible connection, and can be made of a bare copper wire or a tinned copper braid (twisted wire) using a cold-pressing method.

[0033] According to an embodiment of the present application, the pole 10 can be a solid-sealed pole casted by a thermosetting material, and the upper outgoing terminal 110 and the arc-extinguishing chamber 120 can be embedded in the thermosetting material to form an integral component, thereby being able to improve the insulation strength of the pole 10 while reducing the overall size of the circuit breaker including the pole 10. According to an embodiment of the present application, the thermosetting material can be an epoxy resin.

[0034] ​According to an embodiment of the present application, the first end 131 of the flexible connection 130 can be first stacked side by side on the lower outgoing line terminal 140 and fixed by the fastener 150, and then the second end 132 of the flexible connection 130 can be fixed on the movable conducting rod 121 of the arc extinguishing chamber 120 by the double-end screw rod 160. The upper outgoing line terminal 110, the arc extinguishing chamber 120, the plurality of flexible connections 130 and the double-end screw rod 160 are pre-assembled together, and finally the thermosetting material is cast to form the pole 10. Therefore, it is possible to prevent the flexible connection from being difficult to install after casting.

[0035] The utility model further provides a circuit breaker (not shown) comprising the pole 10 described above with reference to Figures 1 to 3 The circuit breaker can provide good insulation and delay the aging of the pole even in high altitude areas.

[0036] In the pole according to the present application, by stacking the plurality of flexible connections side by side, the diameter of the pole at the lower outgoing line terminal can be reduced, the distance between phases can be increased, the electric field strength of the pole to the ground and the electric field strength between phases can be reduced, and the electric field concentration on the epoxy surface at the lower outgoing line terminal can be reduced, thereby improving the insulation performance of the pole and delaying the aging of the pole. In addition, the flexible connections of the pole of the present application are easy to install.

[0037] Although the present application has been described in the specification and illustrated in the drawings on the basis of various embodiments, it is understood by those skilled in the art that the above embodiments are only preferred embodiments, and some technical features in the embodiments can not be essential to solve the specific technical problems, so that these technical features can be omitted without affecting the solution of the technical problems or the formation of the technical scheme. Moreover, the features, elements and / or functions of one embodiment can be appropriately combined, integrated or matched with those of one or more other embodiments, unless the combination, integration or matching is obviously not implementable.

Claims

1. An electrode post, characterized in that, The pole includes: Top outgoing terminal; Bottom outgoing terminal; An arc-extinguishing chamber is disposed in a first direction between the upper outgoing terminal and the lower outgoing terminal; and Multiple flexible connections electrically connect the arc-extinguishing chamber and the lower outgoing terminal, and overlap each other side by side.

2. The pole post according to claim 1, characterized in that, The plurality of soft connections overlap in the first direction and are spaced apart from each other.

3. The pole post according to claim 1, characterized in that, The multiple soft connections are parallel to each other.

4. The pole post according to claim 1, characterized in that, The lower outgoing terminal is formed into a hollow structure, and the plurality of flexible connections are located inside the hollow structure.

5. The electrode post according to claim 4, characterized in that, The first end of each of the plurality of flexible connections is connected to the inner wall of the lower outgoing terminal, and the second end of each of the plurality of flexible connections is connected to the lower end of the arc-extinguishing chamber.

6. The electrode post according to claim 5, characterized in that, The inner wall of the lower outgoing terminal includes a stepped portion, and the first end of each of the plurality of flexible connections is connected to the stepped portion.

7. The pole post according to claim 6, characterized in that, The first end of each of the plurality of flexible connections is secured to the surface of the stepped portion facing the first direction by fasteners.

8. The pole post according to claim 5, characterized in that, The arc-extinguishing chamber includes a movable conductive rod, and the pole also includes a double-ended screw connected to the movable conductive rod. The second end of each of the plurality of flexible connections is fixed to the movable conductive rod by the double-ended screw.

9. The pole post according to claim 1, characterized in that, Each of the plurality of soft connections includes copper.

10. The pole post according to claim 1, characterized in that, The electrode post is a solidified electrode post cast from thermosetting material, and the upper outgoing terminal and the arc-extinguishing chamber are embedded in the thermosetting material.

11. The pole post according to claim 10, characterized in that, The thermosetting material is epoxy resin.

12. A circuit breaker, characterized in that, The circuit breaker includes: The pole according to any one of claims 1-11.

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