Isolation operation and grounding switch interlocking structure and high-voltage switch cabinet

Abstract

The utility model provides an isolation operation and grounding switch interlocking structure and a high-voltage switch cabinet. The interlocking structure comprises an isolation operation limiting assembly and a grounding switch linkage assembly. The isolation operation limiting assembly comprises a limiting fork, the limiting fork comprises a limiting arm and an auxiliary arm which are integrally formed, one end of the limiting arm is transversely arranged in front of the operating contact, and the limiting arm can rotationally leave a butt joint channel of the isolation operation handle and the operating contact; the grounding switch linkage assembly comprises a linkage rod, the top end of the linkage rod is connected with a blocking plate, the linkage rod is arranged on the installation frame in a liftable and penetrating mode and is in linkage with a switch-on and switch-off mode of the grounding switch, and when the grounding switch is switched on, the blocking plate enters a rotation path of the auxiliary arm to block rotation of the auxiliary arm. And when the grounding switch is switched off, the stop plate is positioned below the auxiliary arm. The interlocking structure is simple in structure, convenient to operate and capable of improving operation safety.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage electrical equipment technology. Specifically, this utility model relates to an isolation operation and grounding switch interlocking structure and a high-voltage switch cabinet. Background Technology

[0002] High-voltage switchgear should have extremely high safety and anti-misoperation functions to avoid personal injury and material loss. Therefore, switchgear should have a complete anti-misoperation mechanical interlocking device: that is, it should have the "five protections" function, namely, preventing accidental opening and closing of circuit breakers, preventing opening and closing of disconnecting switches with charge, preventing power supply with grounding, preventing grounding with power on, and preventing accidental entry into energized compartments, so as to effectively prevent the occurrence of electrical misoperation accidents.

[0003] Traditional high-voltage electrical switchgear has complex interlocking functions for disconnecting switches and grounding switches, resulting in numerous parts, complex manufacturing processes, and inconvenient operation. Utility Model Content

[0004] The purpose of this utility model is to provide a simple, safe and reliable interlocking structure for isolation operation and grounding, and a high-voltage switchgear using this interlocking structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] As a first aspect, this utility model provides an interlocking structure for isolating operation and grounding switch, which is installed in a high-voltage switchgear and located between the isolating motor and the grounding switch of an isolating circuit breaker. The isolating motor has an operating contact for inserting an isolating operating handle to operate the isolating circuit. The interlocking structure includes an isolating operation limiting component and a grounding switch linkage component. The isolating operation limiting component includes a mounting base and a limiting fork that is horizontally rotatably mounted on the mounting base. The limiting fork includes a limiting arm and an auxiliary arm that are integrally formed and form an angle. The end of the limiting arm away from the auxiliary arm is positioned horizontally in front of the operating contact, and the limiting arm can rotate to create a docking channel between the isolating operating handle and the operating contact under the pushing action of inserting the isolating operating handle. The grounding switch linkage assembly includes a mounting frame and a linkage rod. The mounting frame is used to install onto the cabinet of the high-voltage switchgear. A stop plate is connected to the top of the linkage rod. The linkage rod can be raised and lowered through the mounting frame and is linked to the opening and closing of the grounding switch. When the grounding switch is closed, the stop plate enters the rotation path of the auxiliary arm to block the rotation of the auxiliary arm. When the grounding switch is opened, the stop plate is located below the auxiliary arm.

[0007] In one embodiment, the isolation operation limiting assembly further includes a return spring, which is used to return the limiting arm to its horizontal position at the front end of the operating contact after the force exerted by the isolation operation handle on the limiting arm is removed.

[0008] In one embodiment, the return spring is a tension spring, and the two ends of the tension spring are respectively connected to the mounting base and the auxiliary arm.

[0009] In one embodiment, the mounting base includes a transverse mounting plate, the transverse mounting plate having a first pivot hole and an extension arm, the limiting fork being mounted to the first pivot hole via a pivot, the extension arm being located on the transverse mounting plate away from the first pivot hole, the extension arm having a spring connection hole, and one end of the tension spring being hooked into the spring connection hole.

[0010] In one embodiment, the auxiliary arm is provided with a plurality of elastic adjustment holes, which are arranged along the length of the auxiliary arm, and the other end of the tension spring is connected to one of the elastic adjustment holes.

[0011] In one embodiment, the limiting fork forms a mounting part at the connection between the limiting arm and the auxiliary arm. The mounting part has a second pivot hole. The pivot is a bolt. The bolt passes through the second pivot hole and the first pivot hole in sequence and is then threadedly connected to a nut.

[0012] In one embodiment, the mounting base further includes a vertical fixing plate formed by bending one end of a horizontal mounting plate downwards. The vertical fixing plate has fixing holes for threaded connectors to pass through and fix to the frame of the isolating circuit breaker.

[0013] In one embodiment, the angle between the limiting arm and the auxiliary arm is an obtuse angle.

[0014] As a second aspect, this utility model also provides a high-voltage switchgear, including a cabinet, an isolating circuit breaker, a grounding switch, and an interlocking structure for the isolating operation and the grounding switch. The isolating circuit breaker includes an operating mechanism, which includes a housing and an isolating motor disposed within the housing. The limiting arm is positioned horizontally in front of the operating contact, and the auxiliary arm extends rotatably to the outside of the housing. The grounding switch linkage assembly is disposed on the outside of the housing and installed in the cabinet.

[0015] In one embodiment, the box body is provided with a frame, the frame has a clearance hole that extends along the width of the frame; the mounting base is fixed to the frame, and the limiting arm passes through the clearance hole and can slide along the clearance hole.

[0016] The beneficial effects of the technical solution provided by this utility model are as follows: In this utility model, a limiting arm rotatably mounted in front of the operating contact of the isolating motor is linked to the grounding switch via a linkage rod. The linkage rod can be raised and lowered to lock the rotation path of the limiting arm or unlock the limiting arm, thereby realizing the linkage between the isolating switch and the grounding switch. The structure is simple, the operation is convenient, and the safety is strong. This utility model, through its simple structure, blocks the insertion path of the operating handle, which can effectively prevent damage to the interlocking parts caused by hard connection of the transmission during rapid operation of the grounding switch. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the isolation operation and grounding opening interlocking structure provided in one embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a mounting base provided in one embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure of a limiting fork provided in one embodiment of the present invention;

[0021] Figure 4 for Figure 1 The diagram shows another state of the isolation operation and grounding switch interlocking structure, illustrating the state of the stop plate of the grounding switch linkage component blocking the auxiliary arm.

[0022] Figure 5 This is a schematic diagram showing the connection relationship between the operating mechanism and the grounding switch linkage assembly according to one embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the operating mechanism, including the housing and the frame, provided in one embodiment of the present utility model. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] See Figures 1 to 4 This utility model relates to an interlocking structure for isolating operation and grounding switch (hereinafter referred to as "interlocking structure 100"), used to realize the interlocking of isolating switch and grounding switch in high-voltage switchgear, avoiding operation of the isolating switch when grounding is closed, preventing misoperation, and improving operational safety. Additionally, please refer to... Figure 5 and Figure 6 This utility model also relates to a high-voltage switchgear that uses the above-mentioned interlocking structure 100.

[0029] It should be noted that the high-voltage switchgear in this embodiment also includes a cabinet, an isolating circuit breaker, and a grounding switch, both of which are installed inside the cabinet. The isolating circuit breaker includes three-phase poles and an operating mechanism 1000. The operating mechanism controls the working state of the three-phase poles, placing them in the working position or the isolated position. The operating mechanism 1000 includes a housing, a frame 300 housed within the housing, and an isolating motor 200 mounted on the frame. The isolating motor 200 is equipped with an operating contact 210, which can be connected to an externally inserted isolating operating handle to operate the isolation function.

[0030] The interlocking structure 100 includes an isolation operation limit component 10 and a grounding switch linkage component 20. The isolation operation limit component 10 is used to restrict the isolation operation handle to be inserted into the docking channel between the isolation operation handle and the operating contact 210 only when the grounding switch is open. The grounding switch linkage component 20 is used to link with the open and closed states of the grounding switch (i.e., the open and closed states of the grounding switch).

[0031] Specifically, the isolation operation limiting assembly 10 includes a mounting base 11 and a limiting fork 12 that is horizontally rotatable on the mounting base 11. The limiting fork 12 includes a limiting arm 121 integrally formed with an obtuse angle and an auxiliary arm 122. The end of the limiting arm 121 away from the auxiliary arm 122 is positioned horizontally in front of the operating contact 210, and the limiting arm 121 can rotate to create a docking channel between the isolation operation handle and the operating contact 210 under the pushing action of the insertion of the isolation operation handle.

[0032] The grounding switch linkage assembly 20 includes a mounting frame 23 and a linkage rod 22. The mounting frame 23 is used to install onto the cabinet of the high-voltage switchgear. A stop plate 221 is connected to the top of the linkage rod 22. The linkage rod 22 is vertically and vertically inserted through the mounting frame 23 and is linked to the opening and closing states of the grounding switch. When the grounding switch is closed, the stop plate 221 enters the rotation path of the auxiliary arm 122 to block the rotation of the auxiliary arm 122. When the grounding switch is open, the stop plate 221 is positioned below the auxiliary arm 122.

[0033] Please combine Figure 4 When the grounding switch is in the closed position, the stop plate 221 on the linkage rod 22 extends upward in conjunction with the opening and closing of the grounding switch, blocking the path of the auxiliary arm 122's horizontal rotation. The auxiliary arm 122 cannot rotate, and the limit arm 121, integrally formed with the auxiliary arm 122, cannot rotate. The isolation operating handle cannot be inserted into the docking channel to disconnect with the operating contact 210 for operation isolation. Please refer to... Figure 1 When the grounding switch is in the open position, the stop plate 221 is located below the auxiliary arm 122, allowing the auxiliary arm 122 to rotate horizontally. The auxiliary arm 122 can rotate, which means the limit arm 121 can rotate, allowing the insertion of the isolation operating handle to operate the isolation. This achieves the interlocking between the disconnecting switch and the grounding switch.

[0034] In this utility model, a limiting arm 121 is rotatably mounted in front of the operating contact 210 of the isolation motor 200. It is linked to the grounding switch via a linkage rod 22. The linkage rod 22 can lock the rotation path of the limiting arm 121 or unlock the limiting arm 121, thereby realizing the linkage between the isolation switch and the grounding switch. The structure is simple, the operation is convenient, and the safety is strong.

[0035] In one embodiment, the isolation operation limiting assembly 10 further includes a return spring 13, which is used to return the limiting arm 121 to its horizontal position at the front end of the operating contact 210 after the force of the isolation operation handle pushing the limiting arm 121 is removed.

[0036] In one embodiment, the return spring 13 is a tension spring, and the two ends of the tension spring are connected to the mounting base 11 and the auxiliary arm 122, respectively.

[0037] Please combine Figure 2 In one embodiment, the mounting base 11 includes a horizontal mounting plate 111 and a vertical fixing plate 112, wherein the vertical fixing plate 112 is formed by bending the horizontal mounting plate 111 downwards.

[0038] The transverse mounting plate 111 is provided with a first pivot hole 1111 and an extension arm 113. The limiting fork 12 is mounted on the first pivot hole 1111 via a pivot. The extension arm 113 is located on the transverse mounting plate 111 away from the first pivot hole 1111. A spring connection hole is provided on the extension arm 113. One end of the tension spring is hooked into the spring connection hole.

[0039] Please combine Figure 5 and Figure 6 The vertical fixing plate 112 has fixing holes for threaded connectors to be inserted and fixed to the frame 300 of the isolating circuit breaker.

[0040] In one embodiment, the auxiliary arm 122 is provided with a plurality of elastic adjustment holes 1221, which are arranged along the length of the auxiliary arm 122. The other end of the tension spring is connected to one of the appropriate elastic adjustment holes 1221 according to the elastic force required to reset the limiting arm.

[0041] In one embodiment, the limiting fork 12 forms a mounting part at the connection between the limiting arm 121 and the auxiliary arm 122. The mounting part has a second pivot hole 123. The pivot is a bolt. The bolt passes through the second pivot hole 123 and the first pivot hole 1111 in sequence and is then threadedly connected to a nut.

[0042] In this utility model, a limiting arm 121 is rotatably mounted in front of the operating contact 210 of the isolation motor 200. It is linked to the grounding switch via a linkage rod 22. The linkage rod 22 can lock the rotation path of the limiting arm 121 or unlock the limiting arm 121, thereby realizing the linkage between the isolation switch and the grounding switch. The structure is simple, the operation is convenient, and the safety is strong.

[0043] As mentioned above, as a second aspect, the high-voltage switchgear of this utility model includes a cabinet, an isolating circuit breaker, a grounding switch, and the aforementioned isolating operation and grounding switch interlocking structure 100. The isolating circuit breaker includes an operating mechanism, which includes a housing and an isolating motor 200 disposed within the housing. The limiting arm 121 is positioned horizontally in front of the operating contact 210, and the auxiliary arm 122 rotatably extends to the outside of the housing. The grounding switch linkage assembly 20 is disposed on the outside of the housing and installed within the cabinet.

[0044] In one embodiment, the frame 300 of the housing has a clearance hole 310 that extends along the width of the frame 300. The mounting base 11 is fixed to the frame 300, and the limiting arm 121 passes through the clearance hole 310 and can slide along the clearance hole 310.

[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 the utility model in 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. An isolating operation and grounding switch interlocking structure for being arranged in a high-voltage switch cabinet and located between an isolating motor of an isolating circuit breaker and a grounding switch, the isolating motor having an operating contact for plugging an isolating operation handle to operate isolation, characterized in that, The isolation operation limiting assembly and the grounding switch linkage assembly are provided. The isolation operation limiting assembly comprises a mounting seat and a limiting fork horizontally rotatably arranged on the mounting seat. The limiting fork comprises a limiting arm and an auxiliary arm integrally formed and forming an included angle.

2. The isolated operation and ground switch interlock structure according to claim 1, characterized by, The limiting arm is horizontally arranged in front of the operating contact, and the limiting arm can rotate to allow the isolation operation handle to pass through the connecting channel of the operating contact under the pushing action of the isolation operation handle.

3. The isolated operation and ground switch interlock structure according to claim 2, characterized by, The grounding switch linkage assembly comprises a mounting frame and a linkage rod.

4. The isolated operation and ground switch interlock structure according to claim 3, characterized by, The mounting frame is used for mounting on the cabinet body of the high-voltage switch cabinet.

5. The isolated operation and ground switch interlock structure according to claim 4, characterized by, The linkage rod is arranged in the mounting frame and is linked with the opening and closing of the grounding switch.

6. The isolated operation and ground switch interlock structure according to claim 4, wherein, When the grounding switch is closed, the stop plate enters the rotating path of the auxiliary arm to block the rotation of the auxiliary arm.

7. The isolated operation and ground switch interlock structure according to claim 3, wherein, When the grounding switch is opened, the stop plate is located below the auxiliary arm.

8. The isolated operation and ground switch interlock structure of claim 1, wherein, The isolation operation limiting assembly further comprises a reset spring.

9. A high voltage switchgear comprising a cabinet, an isolating circuit breaker comprising an operating mechanism, the operating mechanism comprising a housing and an isolating motor arranged in the housing, and a grounding switch, characterized in that The reset spring is used for resetting the limiting arm to be horizontally arranged in front of the operating contact when the pushing force of the isolation operation handle on the limiting arm is removed.

10. High voltage switchgear according to claim 9, characterized in that The reset spring is a tension spring. The two ends of the tension spring are connected with the mounting seat and the auxiliary arm, respectively. The mounting seat comprises a horizontal mounting plate. The horizontal mounting plate is provided with a first rotating shaft hole and an extension arm. The limiting fork is arranged in the first rotating shaft hole through a rotating shaft. The extension arm is arranged at a position away from the first rotating shaft hole. A spring connecting hole is formed in the extension arm. One end of the tension spring is hooked in the spring connecting hole. A plurality of elastic force adjusting holes are formed in the auxiliary arm. The plurality of elastic force adjusting holes are arranged along the length direction of the auxiliary arm. The other end of the tension spring is connected to one of the elastic force adjusting holes. The limiting fork is provided with a mounting portion at the connecting portion of the limiting arm and the auxiliary arm. The mounting portion is provided with a second rotating shaft hole. The rotating shaft is a bolt. The bolt is sequentially arranged in the second rotating shaft hole, the first rotating shaft hole, and is threadedly connected with a nut. The mounting seat further comprises a vertical fixing plate bent downward from one end of the horizontal mounting plate. The vertical fixing plate is provided with a fixing hole. The fixing hole is used for arranging a threaded connecting member to fix the frame of the isolation circuit breaker. The included angle between the limiting arm and the auxiliary arm is obtuse. The isolation operation limiting assembly is arranged in the box body. The limiting arm is horizontally arranged in front of the operating contact of the isolation motor. The auxiliary arm is rotatably arranged outside the box body. The grounding switch linkage assembly is arranged outside the box body and is mounted on the cabinet body. The box body is provided with a frame. The frame is provided with a clearance hole extending along the width direction of the frame. The mounting seat is fixed on the frame. The limiting arm is arranged in the clearance hole and can slide along the clearance hole.

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