Pole and circuit breaker comprising same
By designing a shielded cavity structure at the lower terminal of the pole to surround components such as the head insert of the insulating tie rod, the problem of electric field concentration in circuit breakers in high-altitude areas is solved, improving insulation performance and reducing costs.
Patent Information
- Application Number
- CN202422919758.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-11-28
AI Technical Summary
In existing circuit breakers used in high-altitude areas, the concentration of electric field at the lower end of the pole leads to a decrease in insulation performance and makes them prone to destructive discharge. Furthermore, existing improvement solutions increase manufacturing complexity and cost.
The lower terminal of the pole is designed with a shielded cavity structure, which surrounds the insulating pull rod head insert and other live parts to form a self-shielded structure, thus solving the problem of electric field concentration using existing components.
It improves the insulation performance of the pole, slows down aging, reduces product size and cost, and eliminates the need for additional components.
Smart Images
Figure CN223828384U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a pole and a circuit breaker comprising the pole. BACKGROUND
[0002] As a core component of the circuit breaker, the pole plays a key role in the insulation performance of the circuit breaker. The lower end of the pole is the place where the electric field is most concentrated, and the lower end of the pole is usually provided with an electrically charged component and an insulation pull rod head insert. Therefore, it is very important to improve the insulation performance of these components.
[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 requirements for switch devices used in high-altitude areas are becoming higher and higher. As the most important component in the switch device, the circuit breaker needs to consider the insulation performance requirements of high-altitude products in the design. Therefore, improving the insulation performance of the pole and reducing the insulation aging will be the top priority in designing the circuit breaker for high-altitude areas.
[0004] The prior art usually adopts the following solutions to improve the insulation performance of the pole: adding an insulating base at the bottom of the pole, lengthening the insulation pull rod, and pasting an insulating plate on the shell of the pole. However, these solutions require additional components or lengthening of existing components in the pole, which is not conducive to the miniaturization of the pole, thereby making the manufacturing process of the pole more complex and the manufacturing cost higher. SUMMARY
[0005] Therefore, in view of the above problems, the utility model provides a pole and a circuit breaker comprising the pole.
[0006] According to an embodiment of the utility model, a pole comprises: an upper outgoing terminal; a lower outgoing terminal; an arc-extinguishing chamber between the upper outgoing terminal and the lower outgoing terminal; and an insulation pull rod connected with the arc-extinguishing chamber below the arc-extinguishing chamber and comprising an insulation pull rod head insert arranged at an end of the insulation pull rod connected with the arc-extinguishing chamber, wherein the lower outgoing terminal comprises a first shielding cavity surrounding the insulation pull rod head insert, so that the lower outgoing terminal forms at least part of a shielding structure, and the shielding structure surrounds the insulation pull rod head insert when the arc-extinguishing chamber is in a closed state or an open state.
[0007] In an embodiment, the pole further comprises a sealing cover located at the lower end of the arc-extinguishing chamber and sealing the arc-extinguishing chamber.
[0008] In an embodiment, the sealing cover comprises a second shielding cavity, the sealing cover is adjacent to the top of the lower outgoing terminal, and the first shielding cavity and the second shielding cavity are in communication, so that the sealing cover forms at least part of the shielding structure.
[0009] In an embodiment, the sealing cover and the lower outgoing terminal are formed as an integral member.
[0010] In an embodiment, the arc extinguishing chamber comprises a moving conductor rod at a lower portion of the arc extinguishing chamber, and the shielding structure further surrounds the moving conductor rod, and the shielding structure surrounds the insulating pull rod head insert and the moving conductor rod when the arc extinguishing chamber is in the closed state or the open state.
[0011] In an embodiment, the pole column further comprises a stud connecting between the moving conductor rod and the insulating pull rod head insert of the insulating pull rod, and the shielding structure further surrounds the stud.
[0012] In an embodiment, the pole column further comprises a flexible connection for electrically connecting the arc extinguishing chamber to the lower outgoing terminal, a flexible connection pressing plate pressing one end of the flexible connection against an inner wall of the first shielding cavity of the lower outgoing terminal, and a nut penetrating through the flexible connection pressing plate and the flexible connection to fixedly connect the one end of the flexible connection to the inner wall of the first shielding cavity of the lower outgoing terminal, and the shielding structure further surrounds the flexible connection, the flexible connection pressing plate and the nut, and the shielding structure surrounds the insulating pull rod head insert, the flexible connection, the flexible connection pressing plate and the nut when the arc extinguishing chamber is in the closed state or the open state.
[0013] In an embodiment, the shielding structure is made of aluminum and / or copper.
[0014] In an embodiment, the pole column is a solid pole column comprising an epoxy shell, and the shielding structure is solidified in the epoxy shell.
[0015] According to an embodiment of the present application, a circuit breaker comprises the pole column as described in the foregoing embodiments.
[0016] The present application has the advantages that the lower outgoing terminal of the pole column is directly designed as a structure with a self-shielding cavity, so that the high electric field components at the lower end inside the pole column and the pull rod head insert are directly shielded in the shielding cavity of the lower outgoing terminal of the pole column. Thus, without introducing additional components, the electric field problem inside the pole column is solved by using the existing components of the pole column, the overall insulation performance of the pole column is improved, the aging of the pole column is slowed down, the overall size of the product is reduced, and the product cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] The above and other features and advantages of the exemplary embodiments of the present application will become more apparent from the following detailed description with reference to the accompanying drawings, and the description and drawings are merely illustrative of exemplary embodiments of the present application and do not limit the scope of the present application in any way.
[0018] Figure 1 FIG. 1 is a perspective view of a pole column according to an embodiment of the present application;
[0019] Figure 2The axial cross-section view of the pole column of an embodiment of the utility model;
[0020] Figure 3 The perspective view of the shielding structure of the pole column of an embodiment of the utility model;
[0021] Figure 4 The axial cross-section view of the shielding structure of the pole column of an embodiment of the utility model. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the technical scheme of the present disclosure clearer, the technical scheme 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 schemes within the protection scope of the present disclosure can have fewer components, other components not shown in the drawings, different components, differently arranged components or differently connected components, 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 their usual meanings by those of ordinary skill in the art to which the present disclosure belongs. The use of "first", "second" and similar words in the patent application specification and claims of the present disclosure 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 cover 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, connecting, but can include electrical mounting, setting, connecting, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship of the device in use or the positional relationship shown in the drawings, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0025] Figure 1 And Figure 2The pole column 10 according to the utility model is shown. Reference is made to Figure 1 and Figure 2 The pole column 10 of the utility model is used on a circuit breaker (not shown), and is especially suitable for high-altitude areas. The pole column 10 comprises: an upper outgoing terminal 101; a lower outgoing terminal 103; an arc-extinguishing chamber 102 between the upper outgoing terminal 101 and the lower outgoing terminal 103; and an insulating pull rod 106 connected with the arc-extinguishing chamber 102 below the arc-extinguishing chamber 102 and comprising an insulating pull rod head insert 107 arranged at an upper end of the insulating pull rod 106 connected with the arc-extinguishing chamber 102. Figure 3 and Figure 4 The shielding structure 108 of the pole column 10 is specifically shown. As shown in Figure 3 and Figure 4 In the pole column 10 according to the utility model, the lower outgoing terminal 103 comprises a first shielding cavity 1031 surrounding the insulating pull rod head insert 107, so that the lower outgoing terminal 103 forms at least part of the shielding structure 108 to shield the insulating pull rod head insert 107 of the insulating pull rod 106 within the first shielding cavity 1031. The first shielding cavity 1031 of the lower outgoing terminal 103 can surround the insulating pull rod head insert 107 regardless of whether the arc-extinguishing chamber 102 is in a closed state or an open state. In this way, the problem of electric field concentration on the insulating pull rod head insert 107 is effectively solved without the need to introduce additional components, the electric field within the pole column cavity is purified, the overall insulation performance of the pole column is improved, and the aging of the pole column is slowed down.
[0026] In an embodiment of the utility model, as shown in Figure 2 The pole column 10 further comprises a sealing cover 109 located at a lower end of the arc-extinguishing chamber 102 and sealing the arc-extinguishing chamber 103. Preferably, as shown in Figure 3 and Figure 4 The sealing cover 109 comprises a second shielding cavity 1091, the sealing cover 109 abuts a top portion of the lower outgoing terminal 103, and the first shielding cavity 1031 and the second shielding cavity 1091 are in communication, so that the sealing cover 109 forms at least part of the shielding structure 108. The shielding structure 108 shields the insulating pull rod head insert 107 of the insulating pull rod 106 within the communicating cavities. Optionally, the sealing cover 109 and the lower outgoing terminal 105 can be formed as an integral component, i.e. a component comprising an integral shielding cavity, thereby forming the shielding structure 108.
[0027] In an embodiment of the utility model, as shown in Figure 2 and Figure 4As shown, the arc-extinguishing chamber 102 includes a moving conductive rod 104, a sealing cover 109, and a lower outgoing terminal 103 at the lower part of the arc-extinguishing chamber 103. As a shielding structure 108, it can also surround the moving conductive rod 104. Regardless of whether the arc-extinguishing chamber 102 is in the closed or open state, the shielding structure 108 can shield the moving conductive rod 104 and the insulating pull rod head insert 107 within the connected first shielding cavity 1031 and second shielding cavity 1091. Therefore, without introducing additional components, the problem of electric field concentration at the lower end of the electrode post and the insulating pull rod head insert is effectively solved, the electric field within the electrode post cavity is purified, the overall insulation performance of the electrode post is improved, and the aging of the electrode post is slowed down.
[0028] In one embodiment of this utility model, such as Figure 2 and Figure 4 As shown, the pole post 10 also includes a double-ended screw 105, connected between the moving conductive rod 104 and the insulating pull rod head insert 107. The upper and lower ends of the double-ended screw 105 are threadedly connected to the moving conductive rod 104 and the insulating pull rod head insert 107, respectively. The moving conductive rod 104 is connected to the insulating pull rod 106 via the double-ended screw 105 and the insulating pull rod head insert 107. The sealing cover 109 and the lower terminal 103, as a shielding structure 108, can surround the moving conductive rod 104, the double-ended screw 105, and the insulating pull rod head insert 107, so as to shield the moving conductive rod 104, the double-ended screw 105, and the insulating pull rod head insert 107 within the communicating first shielding cavity 1031 and second shielding cavity 1091.
[0029] In one embodiment of this utility model, such as Figure 2 and Figure 4 As shown, the pole post 10 further includes: a flexible connector 111 for electrically connecting the arc-extinguishing chamber 102 to the lower output terminal 103; a flexible connector pressure plate 112 for pressing one end of the flexible connector 111 against the inner wall of the first shielding cavity 1031 of the lower output terminal 103; and a nut 113, which passes through the flexible connector pressure plate 112 and the flexible connector 111 respectively to fix one end of the flexible connector 111 to the inner wall of the first shielding cavity 1031 of the lower output terminal 103. The sealing cover 109 and the lower output terminal 103, as a shielding structure 108, surround the insulating pull rod head insert 107, the flexible connector 111, the flexible connector pressure plate 112, and the nut 113. Regardless of whether the arc-extinguishing chamber 103 is in the closed or open state, the shielding structure 108 can shield the insulating pull rod head insert 107, flexible connection 111, flexible connection pressure plate 112, and nut 113 within the connected first shielding cavity 1031 and second shielding cavity 1091. Thus, without introducing additional components, the problem of electric field concentration at the lower end of the pole and the insulating pull rod head insert is effectively solved, the electric field within the pole cavity is purified, the overall insulation performance of the pole is improved, and pole aging is slowed down.
[0030] In an embodiment of the utility model, as shown in Figure 2 and Figure 4 The protruding part is formed on the outer surface of the cavity of the lower outgoing terminal 103 and protrudes outward. In operation, current is introduced from the upper outgoing terminal 101, flows through the arc extinguishing chamber 102 and the flexible connection 111 in turn, and finally flows out of the pole 10 from the protruding part of the lower outgoing terminal 103.
[0031] In the pole 10 according to the utility model, the shielding structure 180, for example, the lower outgoing terminal 103 and / or the sealing cover 109, is made of a metal material, for example, aluminum and / or copper, thereby providing a good shielding effect. Alternatively, the pole 10 according to the utility model is a solid-sealed pole, which includes an epoxy shell 110. By embedding the upper outgoing terminal 101, the arc extinguishing chamber 102 and the shielding structure 108 in a curable thermosetting material, for example, epoxy resin, the pole 10 is formed as an integral component, thereby being able to improve the insulation strength.
[0032] The embodiments of the utility model also provide a circuit breaker, which includes the pole 10 according to the foregoing embodiments. The circuit breaker has a good insulation performance and is especially suitable for use in high-altitude areas.
[0033] According to the embodiments of the utility model, the lower outgoing terminal and / or the sealing cover of the pole are directly designed as a cavity structure with self-shielding, so that the high electric field components at the lower end inside the pole and the pull rod head insert are directly shielded in the cavity structure of the pole. In this way, without the need to introduce additional components, the electric field problem inside the pole is solved by using the existing components of the pole, the overall insulation performance of the circuit breaker including the pole is improved, the overall size of the circuit breaker is reduced, and the cost of the circuit breaker is reduced.
[0034] Although the utility model has been specifically shown and described with reference to its exemplary embodiments, it will be appreciated by those skilled in the art that various changes in form and details can be made without departing from the spirit and scope of the utility model defined by the claims.
Claims
1. An electrode post, characterized in that, The pole includes: Top outgoing terminal; Bottom outgoing terminal; An arc-extinguishing chamber is located between the upper outgoing terminal and the lower outgoing terminal; and An insulating tie rod is connected to the arc-extinguishing chamber below it, and includes an insulating tie rod head insert disposed at the end of the insulating tie rod connected to the arc-extinguishing chamber. The lower lead-out terminal includes a first shielding cavity surrounding the insulating pull rod head insert, such that the lower lead-out terminal forms at least a portion of a shielding structure. When the arc-extinguishing chamber is in the closed or open state, the shielding structure surrounds the head insert of the insulating pull rod.
2. The pole post according to claim 1, characterized in that, The pole also includes a sealing cap located at the lower end of the arc-extinguishing chamber and sealing the arc-extinguishing chamber.
3. The pole post according to claim 2, characterized in that, The sealing cover includes a second shielding cavity. The sealing cap is adjacent to the top of the lower outgoing terminal, and the first shielding cavity and the second shielding cavity are in communication, such that the sealing cap forms at least a part of the shielding structure.
4. The pole post according to claim 3, characterized in that, The sealing cover and the lower output terminal are formed as an integral component.
5. The pole post according to claim 3 or 4, characterized in that, The arc-extinguishing chamber includes a movable conductive rod at its lower part, and the shielding structure further surrounds the movable conductive rod. When the arc-extinguishing chamber is in the closed or open state, the shielding structure surrounds the moving conductive rod and the head insert of the insulating pull rod.
6. The electrode post according to claim 5, characterized in that, The pole also includes a double-ended screw, connected between the movable conductive rod and the insulating pull rod head insert. The shielding structure also surrounds the double-ended screw.
7. The pole post according to claim 3 or 4, characterized in that, The pole also includes: a flexible connector for electrically connecting the arc-extinguishing chamber to the lower output terminal; a flexible connector pressure plate for pressing one end of the flexible connector against the inner wall of the first shielding cavity of the lower output terminal; and a nut that passes through the flexible connector pressure plate and the flexible connector to fix one end of the flexible connector to the inner wall of the first shielding cavity of the lower output terminal. The shielding structure further surrounds the flexible connection, the flexible connection pressure plate, and the nut. When the arc-extinguishing chamber is in the closed or open state, the shielding structure surrounds the insulating rod head insert, the flexible connection, the flexible connection pressure plate, and the nut.
8. The pole post according to claim 1 or 3, characterized in that, The shielding structure is made of aluminum or copper.
9. The pole post according to claim 1 or 3, characterized in that, The electrode post is a solidified electrode post including an epoxy shell, and the shielding structure is solidified in the epoxy shell.
10. A circuit breaker, characterized in that, The circuit breaker includes: The pole as described in any one of claims 1-9.