Grounding switch interlocking structure, isolation circuit breaker and high-voltage switch cabinet

Abstract

The utility model provides a grounding switch interlocking structure, an isolation circuit breaker and a high-voltage switch cabinet. The interlocking structure comprises a connecting rod mechanism, a linkage plate, a grounding switch linkage assembly and a limiting baffle plate. The connecting rod mechanism comprises a connecting rod seat, a connecting rod shaft and a connecting rod, the connecting rod shaft is rotatably mounted on the connecting rod seat, and the connecting rod is rotatably fixed on the connecting rod shaft around the connecting rod shaft; the linkage plate is used for being in linkage with the working state switching device and sliding in the horizontal direction, and the linkage plate is connected to one end of the connecting rod; the grounding switch linkage assembly comprises a linkage rod which is used for being in linkage with opening and closing of a grounding switch to move up and down. And the limiting baffle plate is connected to the other end of the connecting rod, so that the limiting baffle plate blocks the upward movement of the linkage rod when the isolation circuit breaker is in the working position, and leaves the upward movement channel of the linkage rod when the isolation circuit breaker is in the isolation position. The grounding switch interlocking structure is simple in structure and high in safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage switchgear technology, specifically to a grounding switch interlocking structure, an isolating circuit breaker, and a high-voltage switch cabinet. Background Technology

[0002] High-voltage switchgear should possess extremely high safety and anti-misoperation functions to prevent personal injury and material loss. Providing high-voltage switchgear with a function to prevent live grounding (or grounding wire connection) can effectively prevent electrical misoperation accidents to a certain extent. However, in traditional high-voltage circuit breaker cabinets, the interlocking of the operating positions of the grounding switch and the isolating circuit breaker is usually a direct connection rather than an operation channel obstruction method. The interlocking function of the isolating switch and the grounding switch can lose reliability due to repeated rapid movements of the grounding switch, and there are also problems such as complex processing and inconvenient operation, so safety and reliability need to be improved. Utility Model Content

[0003] The purpose of this utility model is to provide a grounding switch interlocking structure that is simple in structure and highly secure, as well as an isolating circuit breaker and high-voltage switchgear that uses this grounding switch interlocking structure.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model provides a grounding switch interlocking structure, suitable for installation inside an isolating circuit breaker, for interlocking with the working state switching device inside the isolating circuit breaker to achieve grounding switch interlocking. It includes a linkage mechanism, a linkage plate, a grounding switch linkage assembly, and a limit baffle. The linkage mechanism includes a linkage seat, a linkage shaft, and a linkage rod. The linkage seat is used to install onto the frame inside the isolating circuit breaker. The linkage shaft is rotatably mounted on the linkage seat, and the linkage rod is rotatably fixed to the linkage shaft. The linkage plate is used to connect to the working state switching device for linkage, and can operate in conjunction with the working state switching device. When the state switching device switches between the working position and the isolation position, it slides horizontally. The linkage plate is connected to one end of the linkage. The grounding switch linkage assembly is located on one side of the linkage mechanism and includes a linkage rod that moves up and down in conjunction with the opening and closing of the grounding switch. The limit baffle is connected to the other end of the linkage and can slide horizontally in the opposite direction to the sliding direction of the linkage plate under the action of the linkage plate. This allows the limit baffle to block the upward movement of the linkage rod when the isolating circuit breaker is in the working position and to leave the upward movement channel of the linkage rod when the isolating circuit breaker is in the isolation position.

[0006] In one embodiment, one end of the limiting baffle is bent to form a blocking part, and when the limiting baffle is in the blocking state, at least a portion of the blocking part overlaps with the projection of the linkage rod on the horizontal plane.

[0007] In one embodiment, the end of the limiting baffle away from the blocking part is provided with a first connecting hole for the connecting member to pass through and connect with the connecting rod. The first connecting hole is an oblong hole.

[0008] Furthermore, the grounding switch interlocking structure also includes a support limiting plate, which has a limiting hole. One end of the limiting baffle is connected to the connecting rod, and the other end is retractably disposed in the limiting hole.

[0009] In one embodiment, the support limiting plate includes a main body and a mounting portion formed by bending both ends of the main body, wherein the mounting portion has mounting holes for fixing to the frame inside the isolating circuit breaker.

[0010] In one embodiment, the grounding switch linkage assembly further includes a mounting plate, the two ends of which are bent in the same direction to form a transverse portion, and a guide hole is provided in the transverse portion, through which the linkage rod passes.

[0011] In one embodiment, the connecting rod seat includes a seat plate, a fixing plate formed by bending one end of the seat plate, and a pair of side plates formed by bending the side of the seat plate. The side plates have connecting rod shaft holes, the connecting rod shaft passes through the connecting rod shaft holes, and the connecting rod is connected to the part of the connecting rod shaft that passes through the connecting rod shaft holes.

[0012] In one embodiment, the linkage plate has a second connecting hole for a connector to pass through and connect with the connecting rod, the second connecting hole being an oblong hole.

[0013] As a second aspect, this utility model also provides an isolating circuit breaker, including a housing, wherein a frame and the aforementioned grounding switch interlocking structure are provided inside the housing, and the connecting rod seat is fixed on the frame.

[0014] As a third aspect, this utility model also provides a high-voltage switchgear, including a cabinet, the aforementioned isolating circuit breaker and grounding switch both disposed within the cabinet, wherein the grounding switch linkage assembly is connected to the grounding switch.

[0015] The beneficial effects of the technical solution provided by this utility model are as follows: By setting the linkage plate to be linked with the working position of the isolating circuit breaker, and further transmitting the transmission to the limit baffle through the linkage mechanism, the limit baffle can block the linkage rod when the isolating circuit breaker is in the working position, and allow the linkage rod to move upward when the isolating circuit breaker is in the isolation position, thereby preventing the grounding switch linked with the linkage rod from being operated when in the working position, avoiding misoperation and improving safety; since the linkage plate and the limit baffle slide horizontally in opposite directions under the transmission of the linkage rod, the linkage structure is simple and reliable. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of a grounding switch interlocking structure provided in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a linkage plate provided in one embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the structure of a limiting baffle provided in one embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the structure of a support limiting plate provided in one embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the operating mechanism provided in an embodiment of the present utility model, showing the state in which the limiting baffle blocks the linkage rod;

[0022] Figure 6 for Figure 5 The schematic diagram of the internal structure of the operating mechanism shown illustrates the state in which the limit baffle allows the linkage rod to move upward. Detailed Implementation

[0023] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0024] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0025] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0026] It should be noted that the concepts of "first" and "second" mentioned in this utility model are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0027] See Figures 1 to 5 and combined Figure 5 and Figure 6 This utility model relates to a grounding switch interlocking structure 100 (hereinafter referred to as "interlocking structure 100"), applicable to high-voltage switchgear, which realizes the linkage between the working states of the grounding switch and the isolating circuit breaker. Specifically, when the isolating circuit breaker is in the working position, the grounding switch cannot be closed; when the isolating circuit breaker is in the isolated position, the grounding switch can be closed, avoiding equipment damage and personnel injury caused by misoperation. In addition, correspondingly, isolating circuit breakers and high-voltage switchgear using this grounding switch interlocking structure 100 are provided.

[0028] See Figure 1 The interlocking structure 100 includes a linkage plate 10, a linkage mechanism 30, a limit baffle 40, and a grounding switch linkage assembly 20. The linkage plate 10 and the limit baffle 40 are each fixed at a height within the isolating circuit breaker and are configured to slide horizontally in opposite directions.

[0029] The linkage mechanism 30 includes a linkage seat 31, a linkage shaft 32, and a linkage 33. The linkage seat 31 is used to be installed on the frame inside the isolating circuit breaker. The linkage shaft 32 is rotatably installed on the linkage seat 31. The linkage 33 is rotatably fixed to the linkage shaft 32 around the linkage shaft 32.

[0030] Specifically, the connecting rod seat 31 includes a seat plate, a fixing plate formed by bending one end of the seat plate, and a pair of side plates formed by bending the side of the seat plate. The side plates have connecting rod shaft 32 holes, the connecting rod shaft 32 passes through the connecting rod shaft 32 holes, and the connecting rod 33 is connected to the part of the connecting rod shaft 32 that passes through the connecting rod shaft 32 holes.

[0031] The linkage plate 10 is used to connect to the working state switching device and link with the working state switching device. It can slide horizontally when the working state switching device switches between the working position and the isolation position. The linkage plate 10 is connected to one end of the connecting rod 33.

[0032] The grounding switch linkage assembly 20 is located on one side of the linkage mechanism 30, and includes a linkage rod 21 that moves up and down in conjunction with the opening and closing of the grounding switch. It should be noted that the linkage rod 21 is related to whether the grounding switch handle is inserted; only by pushing the linkage rod upward can the grounding switch operating handle be inserted to operate the grounding switch opening and closing.

[0033] The limiting baffle 40 is connected to the other end of the connecting rod 33 and can slide horizontally under the action of the linkage plate 10, so that when the isolating circuit breaker is in the working position, the limiting baffle 40 is located above the grounding switch linkage assembly 20 to block the upward movement of the linkage rod 21, and when the isolating circuit breaker is in the isolation position, it leaves the upward movement channel of the linkage rod 21.

[0034] When the isolating circuit breaker is in the working position, the limit baffle 40 blocks the linkage rod 21 directly above it, preventing the linkage rod 21 from moving upwards, the grounding switch operating handle from being inserted, and the grounding switch from being opened or closed. When the isolating circuit breaker switches from the working position to the isolating position, it pushes the linkage plate 10 to move horizontally from left to right. The linkage plate 10 drives the connecting rod 33 to rotate clockwise around the connecting rod shaft 32, causing the limit baffle 40 to move horizontally from right to left, opening the upward movement channel of the linkage rod 21. The grounding switch operating handle can then be inserted, allowing the grounding switch to be opened or closed, thus satisfying the interlocking requirement that the grounding switch can only be closed in the isolating position.

[0035] Therefore, by setting the linkage plate 10 to be linked with the working position of the isolating circuit breaker, and further transmitting the transmission to the limit baffle through the linkage mechanism 30, the limit baffle can block the linkage rod 21 when the isolating circuit breaker is in the working position, and allow the linkage rod 21 to move upward when the isolating circuit breaker is in the isolation position. This prevents the grounding switch linked with the linkage rod 21 from being operated when the circuit breaker is in the working position, avoiding misoperation and improving safety. Since the linkage plate 10 and the limit baffle slide horizontally in opposite directions under the transmission of the linkage rod 33, the linkage structure is simple and reliable.

[0036] In one embodiment, one end of the limiting baffle 40 is bent to form a blocking part 41. When the limiting baffle 40 is in the blocking state, at least part of the blocking part 41 and the projection of the linkage rod 21 on the horizontal plane overlap with each other, thereby satisfying the requirement of the limiting baffle 40 to stop the linkage rod 21 and improving the reliability of the interlocking structure 100.

[0037] Please combine Figure 2 and Figure 3 In one embodiment, the limiting baffle 40 has a first connecting hole 42 at its end away from the blocking part 41 for a connector to pass through and connect with the connecting rod 33. The first connecting hole 42 is an oblong hole. The linkage plate 10 has a second connecting hole 11 for a connector to pass through and connect with the connecting rod 33. The second connecting hole 11 is also an oblong hole. Both the first connecting hole 42 and the second connecting hole 11 extend along the height direction.

[0038] By setting the connection hole of the limiting baffle 40 and the linkage plate 10 as an oblong hole, it is convenient to assemble the limiting baffle 40, the linkage plate 10 and the linkage mechanism 30, and the position can also be adjusted to a certain extent.

[0039] Please combine Figure 4 Furthermore, the grounding switch interlocking structure 100 also includes a support limiting plate 50, which has a limiting hole 510. One end of the limiting baffle 40 is connected to the connecting rod 33, and the other end is telescopically disposed in the limiting hole 510. By inserting the limiting baffle 40 into the limiting hole 510, the movement trajectory of the limiting baffle 40 is limited to horizontal sliding, thereby realizing the conversion of the rotation of the connecting rod 33 into horizontal sliding.

[0040] In one embodiment, the support limiting plate 50 includes a main body 51 and a mounting portion 52 formed by bending the two ends of the main body. The mounting portion 52 has mounting holes for fixing to the frame inside the isolating circuit breaker.

[0041] In one embodiment, the grounding switch linkage assembly 20 further includes a mounting plate 22, the two ends of which are bent in the same direction to form a transverse portion, and a guide hole is provided in the transverse portion, through which the linkage rod 21 passes.

[0042] Secondly, the present invention provides an isolating circuit breaker, comprising a housing, wherein a frame 200 and the aforementioned grounding switch interlocking structure 100 are provided inside the housing, and the connecting rod seat is fixed to the frame 200. The supporting limiting plate 50 is fixed to the side of the frame 200 opposite to the connecting rod mechanism 30.

[0043] Since the isolating circuit breaker has the aforementioned grounding switch interlocking structure 100, it must have its beneficial effects, which will not be elaborated here.

[0044] Thirdly, the high-voltage switchgear of this utility model includes a cabinet, the aforementioned isolating circuit breaker and grounding switch both housed within the cabinet, and the grounding switch linkage assembly is connected to the grounding switch. Since the high-voltage switchgear has the aforementioned grounding switch interlocking structure, it inevitably possesses beneficial effects, which will not be elaborated upon here.

[0045] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of this utility model that have similar functions.

[0046] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A grounding switch interlocking structure, suitable for installation within an isolating circuit breaker, for use in conjunction with a working state switching device within the isolating circuit breaker to achieve interlocking of the grounding switch, characterized in that, This includes linkage mechanisms, linkage plates, grounding switch linkage components, and limit baffles; The linkage mechanism includes a linkage seat, a linkage shaft, and a linkage. The linkage seat is used to be installed on the frame inside the disconnect circuit breaker. The linkage shaft is rotatably installed on the linkage seat, and the linkage is rotatably fixed to the linkage shaft around the linkage shaft. The linkage plate is used to connect to the working state switching device and link with the working state switching device. It can slide horizontally when the working state switching device switches between the working position and the isolation position. The linkage plate is connected to one end of the connecting rod. The grounding switch linkage assembly is located on one side of the linkage mechanism, and includes a linkage rod for moving up and down in conjunction with the opening and closing of the grounding switch. The limiting baffle is connected to the other end of the linkage and can slide horizontally in the opposite direction to the sliding direction of the linkage plate under the action of the linkage plate. This allows the limiting baffle to block the upward movement of the linkage rod when the isolating circuit breaker is in the working position and to leave the upward movement channel of the linkage rod when the isolating circuit breaker is in the isolation position.

2. The grounding interlocking structure according to claim 1, characterized in that, One end of the limiting baffle is bent to form a blocking part. When the limiting baffle is in the blocking state, at least a portion of the blocking part overlaps with the projection of the linkage rod on the horizontal plane.

3. The grounding interlocking structure according to claim 2, characterized in that, The limiting baffle has a first connecting hole at the end away from the blocking part for the connecting piece to connect with the connecting rod. The first connecting hole is a waist-shaped hole.

4. The grounding interlocking structure according to claim 1, characterized in that, It also includes a support limiting plate, which has a limiting hole. One end of the limiting baffle is connected to the connecting rod, and the other end is telescopically disposed in the limiting hole.

5. The grounding interlocking structure according to claim 4, characterized in that, The support limiting plate includes a main body and a mounting part formed by bending both ends of the main body. The mounting part has mounting holes for fixing to the frame inside the isolating circuit breaker.

6. The grounding interlocking structure according to claim 1, characterized in that, The grounding switch linkage assembly also includes a mounting plate, the two ends of which are bent in the same direction to form a horizontal part, and a guide hole is provided in the horizontal part, through which the linkage rod passes.

7. The grounding interlocking structure according to claim 1, characterized in that, The connecting rod seat includes a seat plate, a fixing plate formed by bending one end of the seat plate, and a pair of side plates formed by bending the side of the seat plate. The side plates have connecting rod shaft holes, the connecting rod shaft passes through the connecting rod shaft holes, and the connecting rod is connected to the part of the connecting rod shaft that passes through the connecting rod shaft holes.

8. The grounding interlocking structure according to claim 1, characterized in that, The linkage plate has a second connecting hole for the connecting member to connect with the connecting rod. The second connecting hole is a waist-shaped hole.

9. A circuit breaker, comprising a housing, wherein a frame is provided inside the housing, characterized in that, It also includes the grounding switch interlocking structure as described in any one of claims 1 to 8, wherein the connecting rod seat is fixed to the frame.

10. A high-voltage switchgear, comprising a cabinet, an isolating circuit breaker, and a grounding switch all disposed within the cabinet, characterized in that, The isolating circuit breaker is the isolating circuit breaker as described in claim 9, and the grounding switch linkage assembly is connected to the grounding switch.

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