Built-in isolated pole for vacuum circuit breaker

Abstract

This utility model provides a built-in isolation pole for a vacuum circuit breaker, relating to the field of circuit breaker technology. The built-in isolation pole includes: a pole body; an arc-extinguishing chamber disposed within the pole body, the arc-extinguishing chamber including a moving end and a stationary end; a pull rod assembly including a connecting rod, a first pull rod, a second pull rod, a pull rod sleeve, and an adjusting rod; a first conductive member disposed within the pole body, one end of the first conductive member being connected to the connecting rod; an isolation assembly disposed within the pole body and located on one side of the pull rod assembly, the isolation assembly including a stationary contact and a moving blade; a current transformer disposed within the pole body and located on the side of the isolation assembly away from the pull rod assembly; and a second conductive member, one end of the second conductive member being connected to the stationary contact, the other end of the second conductive member extending out of the pole body. The built-in isolation pole effectively improves the mechanical and electrical performance of the vacuum circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a built-in isolation pole of a vacuum circuit breaker. Background Technology

[0002] In existing vacuum circuit breakers, the disconnecting switch, current transformer, and pole are generally separate components. This non-integrated structure has shortcomings in electrical and mechanical performance and is also prone to failure due to poor connection. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of existing vacuum circuit breakers and provide a built-in isolation pole for a vacuum circuit breaker, which can effectively improve the mechanical and electrical performance of the vacuum circuit breaker.

[0004] To achieve the above and other objectives, this utility model provides a built-in isolation pole for a vacuum circuit breaker, comprising: a pole body; an arc-extinguishing chamber disposed within the pole body, the arc-extinguishing chamber including a moving end and a stationary end, the top of the stationary end extending out of the pole body; and a pull rod assembly disposed within the pole body and located below the arc-extinguishing chamber, the pull rod assembly including a connecting rod, a first pull rod, a second pull rod, a pull rod sleeve, and an adjusting rod, one end of the connecting rod being fixedly connected to the moving end of the arc-extinguishing chamber, one end of the first pull rod being connected to the other end of the connecting rod, and the other end of the first pull rod being connected to one end of the second pull rod. The other end of the second pull rod is connected to one end of the pull rod sleeve, and the other end of the pull rod sleeve is connected to the adjusting rod; a first conductive member is disposed in the pole body, one end of the first conductive member is connected to the connecting rod and located below the arc-extinguishing chamber; an isolation assembly is disposed in the pole body and located on one side of the pull rod assembly, the isolation assembly includes a stationary contact and a moving blade, and the other end of the first conductive member is connected to one end of the moving blade; a current transformer is disposed in the pole body and located on the side of the isolation assembly away from the pull rod assembly; and a second conductive member passes through the current transformer, one end of the second conductive member is connected to the stationary contact, and the other end of the second conductive member extends out of the pole body.

[0005] In one embodiment, the pull rod assembly further includes a spring seat and a first spring. The spring seat is disposed between the first pull rod and the pull rod sleeve and is located around the second pull rod. The first spring is sleeved on the spring seat.

[0006] In one embodiment, the second pull rod has a first through hole, the pull rod sleeve has a second through hole, and a limit rod is provided in the first through hole and the second through hole.

[0007] In one embodiment, the height of the first through hole is greater than the diameter of the limiting rod, and the diameters of the second through hole and the limiting rod are adapted to each other.

[0008] In one embodiment, the moving blade includes a first moving blade and a second moving blade, the top of the first moving blade and the bottom of the second moving blade are connected, the top of the first moving blade has a first groove, a first contact finger is disposed in the first groove and sleeved on the bottom of the second moving blade, and a second spring is sleeved around the first contact finger.

[0009] In one embodiment, a second groove is provided at the bottom of the stationary contact, and a second contact finger and a third spring are provided on the outer wall of the second groove, with the third spring disposed around the second contact finger.

[0010] In one embodiment, the current transformer includes a transformer body and a wire connected to the transformer body, the transformer body being located at the top of the pole body, and the wire extending downward toward the pole body.

[0011] In one embodiment, an insulating ring is further provided on the periphery of the pole body.

[0012] In one embodiment, the built-in isolation pole further includes a capacitor located within the pole body and disposed around the pull rod assembly.

[0013] In one embodiment, the capacitor includes a first capacitor and a second capacitor, the first capacitor being electrically connected to the stationary end of the arc-extinguishing chamber, and the second capacitor being electrically connected to the stationary contact.

[0014] This utility model provides a built-in isolation pole for a vacuum circuit breaker. Compared with the prior art, this utility model has the following advantages: The pole structure provided by this utility model is an integrated design. The integrated built-in isolation pole integrates the vacuum circuit breaker, disconnecting switch, and current transformer into a solid-sealed pole. The shape is modular, the pole strength is firm and stable, the protection conditions of high-voltage components and transmission system are completely improved, and the sealing performance is excellent. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 The diagram shown is a structural schematic of the isolation pole of this utility model.

[0017] Figure 2 The image shown is a cross-sectional view of the isolation pole of this utility model.

[0018] Figure 3 The diagram shown is an internal structural diagram of the isolation pole of this utility model.

[0019] Figure 4 The image shown is a partial view of the isolation pole of this utility model. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] like Figures 1 to 4 As shown, this utility model provides a built-in isolation pole 100 for a vacuum circuit breaker. The built-in isolation pole 100 includes a pole body 1, which may be an epoxy pole body 1. Multiple insulating rings 2, which are silicone insulating rings, are arranged around the top and bottom peripheries of the pole body 1. The built-in isolation pole can be integrally mounted on a mechanism box 200. The mechanism box 200 can house the relevant electrical components of the vacuum circuit breaker and the mechanical components for driving closing and opening.

[0022] like Figure 2 As shown, the built-in isolation pole 100 includes a vacuum interrupter 3, which is disposed within the pole body 1. The vacuum interrupter 3 includes a proximal end at the top and a moving end at the bottom. The stationary end of the vacuum interrupter 3 can be connected to the incoming terminal after passing through a pre-drilled hole at the top of the pole body 1.

[0023] like Figure 2 and Figure 4As shown, the built-in isolation pole 100 includes a pull rod assembly 4. The pull rod assembly 4 can make the moving end and the stationary end of the arc-extinguishing chamber 3 contact and separate, so as to realize the closing and opening of the arc-extinguishing chamber 3. The pull rod assembly 4 can be disposed below the vacuum arc-extinguishing chamber 3 and located inside the pole body 1. The pull rod assembly 4 includes a connecting rod 41, the top of which is fixedly connected to the moving end of the vacuum arc-extinguishing chamber 3. The pull rod assembly 4 includes a first pull rod 42, the top of which is connected to the bottom of the connecting rod 41. The pull rod assembly 4 includes a second pull rod 43, the top of which is connected to the bottom of the connecting rod 41. The bottom of the first pull rod 42 is connected, for example, by a threaded connection. The periphery of the second pull rod 43 is also provided with a first spring 47 and a spring seat 46. The first spring 47 is clamped on the spring seat 46. The pull rod assembly 4 includes an adjusting rod 45, which is connected below the second pull rod 43. The second pull rod 43 and the adjusting rod 45 can be connected together by a pull rod sleeve 44. Specifically, the top of the adjusting rod 45 is connected to the inside of the pull rod sleeve 44, and the bottom of the second pull rod 43 is connected to the inside of the pull rod sleeve 44. The spring seat 46 is disposed between the pull rod sleeve 44 and the first pull rod 42. The bottom of the second pull rod 43 and the pull rod sleeve 44 respectively have a first through hole 43a and a second through hole 44a. Limiting rods 48 are provided in the first through hole 43a and the second through hole 44a. The height of the first through hole 44a in the second pull rod 43 is greater than the diameter of the limiting rod 48. The diameter of the second through hole 44a is adapted to the diameter of the limiting rod 48. The first spring 47 can cooperate with the first through hole 43a and the limiting post 48 to ensure the stability of opening and closing the circuit.

[0024] like Figure 2 As shown, the built-in isolation pole 100 includes a first conductive element 5, which is located inside the pole body 1. One end of the first conductive element 5 is connected to the periphery of the connecting rod 41 and is located below the moving end of the vacuum interrupter 3.

[0025] like Figure 2As shown, the built-in isolation pole 100 includes an isolation component 6, which is disposed within the pole body 1. The isolation component 6 is located on one side of the vacuum interrupter 3 and the pull rod assembly 4. The isolation component 6 includes a moving blade and a stationary contact 63. The moving blade includes a first moving blade 61 and a second moving blade 62, with the top of the first moving blade 61 and the bottom of the second moving blade 62 connected. The isolation component 6 includes a base 64, which is connected to the other end of the first conductive member 5. The base 64 is disposed around the second moving blade 62. A first contact finger 65 is also provided, and a second spring 66 is provided around the first contact finger 65. Specifically, the top of the first moving blade 61 has a first groove 61a, and the first contact finger 65 and the second spring 66 are at least partially located within the first groove 61a. The stationary contact 63 is located above the second moving blade 62, and a second contact finger 67 is provided around the stationary contact 63. A third spring 68 is provided around the second contact finger 67. The first contact finger 65 can increase the contact pressure between the base 64 and the moving blade, and the second contact finger 67 can increase the contact pressure between the moving blade and the stationary contact 63. A second groove 63a is formed at the bottom of the stationary contact 63, and the second contact finger 67 and the third spring 68 are provided on the outer wall of the second groove 63a. The third spring 68 is located around the second contact finger 67. The second groove 63a can be adapted to the top of the second moving blade 62 to complete the closing and conduction.

[0026] like Figure 2 and Figure 4 As shown, the built-in isolation pole 100 includes a current transformer 7, which is located inside the pole body 1. The current transformer 7 is disposed on the side of the isolation assembly 6 away from the pull rod assembly 4. The current transformer 7 includes a transformer body 71 and a wire 72 connected to the transformer body 71. One end of the wire 72 is connected to the transformer body 71, and the other end of the wire 72 extends to the bottom of the pole body 1 to be electrically connected to the relevant electrical components in the mechanism box 200.

[0027] like Figure 3 and Figure 4 As shown, the built-in isolation pole 100 includes a second conductive member 8, which passes through the transformer body 71. One end of the second conductive member 8 is connected to the other end of the stationary contact 63, and the other end of the second conductive member 8 can extend out of the pole body 1 to connect with the outgoing terminal.

[0028] like Figure 3As shown, in some embodiments, the built-in isolation pole 100 includes a capacitor 9, which may be a ceramic capacitor. The capacitor 9 is disposed within the pole body 1 and may be located on the periphery of the pull rod assembly 4. The capacitor 9 includes a first capacitor 91 and a second capacitor 92. The top of the first capacitor 91 is electrically connected to the stationary end of the arc-extinguishing chamber 3, and the top of the second capacitor 92 is electrically connected to the stationary contact 63. There may be two of each of the first capacitor 91 and the second capacitor 92. The capacitor 9 can provide a stable low-voltage power supply for the control and protection system of the circuit breaker, ensuring the safety and reliability of the circuit breaker.

[0029] The built-in isolation pole 100 of this utility model can be installed as a whole on the mechanism box 200. The adjusting rod 45 at the bottom of the pull rod assembly 4 can be connected to the connecting plate assembly 201 inside the mechanism box 200, so as to realize the movement of the moving end inside the arc-extinguishing chamber 3 driven by the pull rod assembly 4 to realize the opening and closing of the arc-extinguishing chamber 3. The first moving blade 61 at the bottom of the isolation assembly 6 can be connected to the connecting rod assembly 202 inside the mechanism box 200, so as to realize the operation of opening, disconnecting and closing of the vacuum circuit breaker.

[0030] It should be understood that the terms "height," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A built-in isolation pole of a vacuum circuit breaker, characterized in that: The built-in isolation electrode includes: pole body; An arc-extinguishing chamber is disposed within the electrode post body. The arc-extinguishing chamber includes a moving end and a stationary end, with the top of the stationary end extending out of the electrode post body. A pull rod assembly is disposed within the pole body and located below the arc-extinguishing chamber. The pull rod assembly includes a connecting rod, a first pull rod, a second pull rod, a pull rod sleeve, and an adjusting rod. One end of the connecting rod is fixedly connected to the moving end of the arc-extinguishing chamber. One end of the first pull rod is connected to the other end of the connecting rod. The other end of the first pull rod is connected to one end of the second pull rod. The other end of the second pull rod is connected to one end of the pull rod sleeve. The other end of the pull rod sleeve is connected to the adjusting rod. A first conductive element is disposed within the pole body, with one end of the first conductive element connected to the connecting rod and located below the arc-extinguishing chamber; An isolation component is disposed within the pole body and located on one side of the pull rod assembly. The isolation component includes a stationary contact and a moving blade, and the other end of the first conductive member is connected to one end of the moving blade. A current transformer is disposed within the pole body and located on the side of the isolation assembly away from the tie rod assembly; And a second conductive element, which passes through the current transformer, with one end of the second conductive element connected to the stationary contact and the other end of the second conductive element extending out of the pole body.

2. The built-in isolation electrode post according to claim 1, characterized in that: The pull rod assembly also includes a spring seat and a first spring. The spring seat is disposed between the first pull rod and the pull rod sleeve and is located around the second pull rod. The first spring is sleeved on the spring seat.

3. The built-in isolation electrode post according to claim 1, characterized in that: The second pull rod has a first through hole, and the pull rod sleeve has a second through hole. Limiting rods are provided in the first through hole and the second through hole.

4. The built-in isolation electrode post according to claim 3, characterized in that: The height of the first through hole is greater than the diameter of the limiting rod, and the diameters of the second through hole and the limiting rod are adapted to each other.

5. The built-in isolation electrode post according to claim 1, characterized in that: The moving blade includes a first moving blade and a second moving blade. The top of the first moving blade and the bottom of the second moving blade are connected. The top of the first moving blade has a first groove. A first contact finger is provided in the first groove and sleeved on the bottom of the second moving blade. A second spring is sleeved around the first contact finger.

6. The built-in isolation electrode post according to claim 1, characterized in that: The bottom of the stationary contact is provided with a second groove, and a second contact finger and a third spring are provided on the outer wall of the second groove. The third spring is provided around the second contact finger.

7. The built-in isolation electrode post according to claim 1, characterized in that: The current transformer includes a transformer body and a wire connected to the transformer body. The transformer body is located at the top of the pole body, and the wire extends downward toward the pole body.

8. The built-in isolation electrode post according to claim 1, characterized in that: An insulating ring is also provided around the periphery of the pole body.

9. The built-in isolation electrode post according to claim 1, characterized in that: The built-in isolation pole also includes a capacitor, which is located inside the pole body and disposed around the pull rod assembly.

10. The built-in isolation electrode post according to claim 9, characterized in that: The capacitor includes a first capacitor and a second capacitor. The first capacitor is electrically connected to the stationary end of the arc-extinguishing chamber, and the second capacitor is electrically connected to the stationary contact.

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