A three-station isolation operating mechanism for a ring main unit

Abstract

The present invention proposes a three-station isolation operating mechanism for a ring network cabinet, comprising a front panel, a rear panel, an output shaft assembly, an energy storage spring assembly, an isolation operating shaft assembly, a grounding operating shaft assembly and an operating hole baffle, wherein the front panel and the rear panel are arranged in parallel to form a cavity, wherein the output shaft assembly, the isolation operating shaft assembly and the grounding operating shaft assembly are all arranged in the cavity, wherein the isolation operating shaft assembly and the grounding operating shaft assembly are respectively arranged on both sides of the output shaft assembly, wherein the isolation operating shaft assembly and the grounding operating shaft assembly are connected by transmission via the output shaft assembly, wherein the energy storage spring assembly is connected between the isolation operating shaft assembly and the grounding operating shaft assembly, and wherein the operating hole baffle is installed on the top of the output shaft assembly. The isolation and grounding opening and closing processes are completed by the spring energy storage release function, thereby making the performance of the disconnector more stable and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, and more specifically to a three-station isolation operating mechanism for a ring network cabinet. Background Art

[0002] At present, with the development of the national economy and the advancement of science and technology, many large-scale power consumption sites have been using ring network cabinets on a large scale; compared with traditional switch cabinets, the ring network cabinet has a simple structure, safe and reliable operation, low maintenance frequency and low operating costs. In the technology of ring network cabinets, isolating switches are widely used. As a circuit switch in the ring network cabinet, the isolating switch not only plays the role of an ordinary switch, but also ensures the reliable grounding of the safety break and the lower end of the isolation, which absolutely guarantees the safety of circuit maintenance and repair personnel. It is one of the very important components in the ring network cabinet.

[0003] The existing disconnector failures mostly occur in the operating mechanism, because the mechanism has many parts and components, the operation is cumbersome, and the isolation spring and grounding spring are set separately, the overall volume is large, and the original mechanism operating force direction and the transmission main shaft movement direction are mostly gear transmission, the operating force is large, and the transmission accuracy is low. On the other hand, most of the operating mechanisms are fixed on the ring network cabinet together with the disconnector body. If the operating mechanism is damaged, the disconnector will fail and need to be disassembled from the ring network cabinet for processing, resulting in a long power outage time for maintenance and very inconvenient maintenance. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a three-position isolation operating mechanism for a ring main unit.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A three-station isolation operating mechanism for a ring main unit, comprising a front panel, a rear panel, an output shaft assembly, an energy storage spring assembly, an isolation operating shaft assembly, a grounding operating shaft assembly and an operating hole baffle, wherein the front panel and the rear panel are arranged in parallel to form a cavity, the output shaft assembly, the isolation operating shaft assembly and the grounding operating shaft assembly are all arranged in the cavity, the isolation operating shaft assembly and the grounding operating shaft assembly are respectively arranged on both sides of the output shaft assembly, the isolation operating shaft assembly and the grounding operating shaft assembly are connected by transmission through the output shaft assembly, the energy storage spring assembly is connected between the isolation operating shaft assembly and the grounding operating shaft assembly, and the operating hole baffle is installed on the top of the output shaft assembly;

[0007] The isolation operating shaft assembly is rotated counterclockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate and block the grounding operating shaft assembly, thereby closing the isolation mechanism;

[0008] Rotate the isolation operation shaft assembly clockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operation hole baffle to rotate and release the limit of the grounding operation shaft assembly, thereby realizing the opening of the isolation mechanism;

[0009] Rotate the grounding operation shaft assembly clockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operation hole baffle to rotate and block the isolation operation shaft assembly, thereby closing the grounding mechanism;

[0010] The grounding operation shaft assembly is rotated counterclockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operation hole baffle to rotate to release the limit of the isolation operation shaft assembly, thereby realizing the opening of the grounding mechanism.

[0011] Its further technical solution is: the output shaft assembly includes an output main shaft, and the two ends of the output main shaft are respectively welded with an isolation crank arm and a grounding crank arm, and the bottom end of the output main shaft is provided with a slotted mechanism output point.

[0012] Its further technical solution is: the energy storage spring assembly includes an energy storage spring and a two-stage telescopic guide shaft inserted through the center of the energy storage spring, and step sleeves for limiting the energy storage spring are respectively provided at both ends of the two-stage telescopic guide shaft, and the step sleeves are respectively installed in contact with the isolation operating shaft assembly and the grounding operating shaft assembly.

[0013] Its further technical solution is: the isolation operating shaft assembly includes an isolation operating shaft, a front energy storage spring crank arm and an energy storage spring limiting cam, the front energy storage spring crank arm is welded to the middle of the isolation operating shaft, the energy storage spring limiting cam is sleeved on the upper part of the isolation operating shaft, the upper part of the energy storage spring limiting cam is provided with a pin, which is connected to the isolation crank arm through a slide groove connecting plate, and the top of the isolation operating shaft is provided with an external hexagon.

[0014] Its further technical solution is: the grounding operating shaft assembly includes a grounding operating shaft, a rear energy storage spring crank arm and an energy storage spring limiting cam, the rear energy storage spring crank arm is welded to the middle of the grounding operating shaft, the energy storage spring limiting cam is sleeved on the bottom of the isolation operating shaft, a pin is provided on the upper part of the energy storage spring limiting cam, which is connected to the grounding crank arm of the output shaft assembly through a slide groove connecting piece, and an external hexagon is provided on the top of the grounding operating shaft.

[0015] A further technical solution is as follows: a support column is provided between the front panel and the rear panel.

[0016] A further technical solution is as follows: both ends of the output shaft assembly, the isolation operation shaft assembly and the grounding operation shaft assembly are provided with copper sleeves, and the copper sleeves penetrate the concentric front panel and the rear panel.

[0017] The beneficial effects of the invention compared with the prior art are as follows: a three-station isolation operating mechanism of a ring main unit of the present invention is achieved by respectively arranging an isolation operating shaft assembly and a grounding operating shaft assembly on both sides of an output shaft assembly, wherein the isolation operating shaft assembly and the grounding operating shaft assembly are connected in transmission via the output shaft assembly, and an energy storage spring assembly is connected between the isolation operating shaft assembly and the grounding operating shaft assembly, and an operating hole baffle is installed on the top of the output shaft assembly; the isolation operating shaft assembly is rotated counterclockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate to block the grounding operating shaft assembly, thereby closing the isolation mechanism; the isolation operating shaft assembly is rotated clockwise to close the isolation operating shaft assembly. The isolation operation shaft assembly compresses the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate to make way for the grounding operation shaft assembly to release the limit, thereby realizing the opening of the isolation mechanism; the grounding operation shaft assembly is rotated clockwise, compresses the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate to block the isolation operation shaft assembly, thereby realizing the closing of the grounding mechanism; the grounding operation shaft assembly is rotated counterclockwise, compresses the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate to make way for the isolation operation shaft assembly to release the limit, thereby realizing the opening of the grounding mechanism. The entire structure is simple and reasonable, the design is ingenious, and it is anti-misoperation and modularly designed. The isolation opening and closing spring and the grounding opening and closing spring are combined into one, with fewer parts, and the isolation and grounding opening and closing processes are completed by the spring energy storage release function, making the performance of the isolation switch more stable and reliable. In addition, it can be separated from the isolation switch body for maintenance, making maintenance faster and easier.

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the three-station isolation operating mechanism of the ring main unit of the present invention;

[0020] Figure 2 This is a structural diagram of the output shaft assembly of the three-station isolation operating mechanism of the ring main unit of the present invention;

[0021] Figure 3 It is a front schematic diagram of the isolation closing of the three-position isolation operating mechanism of the ring main unit of the present invention;

[0022] Figure 4 It is a schematic diagram of the isolation closing angle of 45° of the three-position isolation operating mechanism of the ring main unit of the present invention;

[0023] Figure 5 It is a front schematic diagram of the isolation switch of the three-position isolation operating mechanism of the ring main unit of the present invention;

[0024] Figure 6It is a schematic diagram of the isolation switch of the three-station isolation operating mechanism of the ring main unit of the present invention at a 45° angle;

[0025] Figure 7 It is a front schematic diagram of the grounding closing of the three-position isolation operating mechanism of the ring main unit of the present invention;

[0026] Figure 8 It is a schematic diagram of the 45° angle of grounding closing of the three-position isolation operating mechanism of the ring main unit of the present invention. DETAILED DESCRIPTION

[0027] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated in conjunction with specific embodiments below, but is not limited thereto.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0030] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Unless otherwise specified, " / " in this article means "or"

[0032] like Figures 1 to 8As shown, a three-station isolation operating mechanism of a ring main unit comprises a front panel 1, a rear panel 5, an output shaft assembly 300, an energy storage spring assembly 400, an isolation operating shaft assembly 100, a grounding operating shaft assembly 200 and an operating hole baffle 3. The front panel 1 and the rear panel 5 are arranged in parallel to form a cavity. The output shaft assembly 300, the isolation operating shaft assembly 100 and the grounding operating shaft assembly 200 are all arranged in the cavity. The isolation operating shaft assembly 100 and the grounding operating shaft assembly 200 are respectively arranged on both sides of the output shaft assembly 300. The isolation operating shaft assembly 100 and the grounding operating shaft assembly 200 are connected by transmission through the output shaft assembly 300. The energy storage spring assembly 400 is connected between the isolation operating shaft assembly 100 and the grounding operating shaft assembly 200. The operating hole baffle 3 is installed on the top 302 of the output shaft assembly 300.

[0033] The isolation operating shaft assembly 100 is rotated counterclockwise to compress the energy storage spring assembly 400, so that the output shaft of the output shaft assembly 300 rotates and drives the operating hole baffle 3 to rotate to block the grounding operating shaft assembly 200, thereby closing the isolation mechanism;

[0034] Rotate the isolation operating shaft assembly 100 clockwise to compress the energy storage spring assembly 400, so that the output shaft of the output shaft assembly 300 rotates and drives the operating hole baffle 3 to rotate and release the limit of the grounding operating shaft assembly 200, so as to realize the opening of the isolation mechanism;

[0035] Rotate the grounding operation shaft assembly 200 clockwise to compress the energy storage spring assembly 400 so that the output shaft of the output shaft assembly 300 rotates and drives the operation hole baffle 3 to rotate to block the isolation operation shaft assembly 100, thereby closing the grounding mechanism;

[0036] Rotate the grounding operating shaft assembly 200 counterclockwise, compress the energy storage spring assembly 400, so that the output shaft of the output shaft assembly 300 rotates and drives the operating hole baffle 3 to rotate to release the limit of the isolation operating shaft assembly 100, and realize the grounding mechanism opening. This three-position isolation operating mechanism of the ring network cabinet has a simple and reasonable structure, ingenious design, anti-misoperation, modular design, isolation opening and closing spring and grounding opening and closing spring are combined into one, with fewer parts, and the isolation and grounding opening and closing processes are completed by the spring energy storage release effect, making the performance of the isolation switch more stable and reliable. In addition, it can be separated from the isolation switch body for maintenance, which is faster and easier to maintain.

[0037] Specifically, Figure 2 As shown, the output shaft assembly 300 includes an output main shaft 11 , at both ends of which are respectively welded an isolation crank arm 10 and a ground crank arm 12 , and at the bottom end of the output main shaft 11 a slotted 301 mechanism output point is provided.

[0038] Specifically, Figures 1 to 6As shown, the energy storage spring assembly 400 includes an energy storage spring 13 and a two-stage telescopic guide shaft 14 inserted through the center of the energy storage spring 13. Step sleeves 15 and 16 for limiting the energy storage spring 13 are respectively provided at both ends of the two-stage telescopic guide shaft 14. The step sleeves 15 and 16 are respectively installed in contact with the isolation operating shaft assembly 100 and the grounding operating shaft 22 assembly 200.

[0039] Specifically, Figures 1 to 6 As shown, the isolation operating shaft assembly 100 includes an isolation operating shaft 17, a front energy storage spring crank arm 19 and an energy storage spring limiting cam 18. The front energy storage spring crank arm 19 is welded to the middle of the isolation operating shaft 17, and the energy storage spring limiting cam 18 is sleeved on the upper part of the isolation operating shaft 17. A pin 20 is provided on the upper part of the energy storage spring limiting cam 18, which is connected to the isolation crank arm 10 through a slide groove connecting piece 21. An outer hexagon 101 is provided on the top of the isolation operating shaft 17. When the outer hexagon 101 at the top of the isolation operating shaft 17 is rotated counterclockwise, the front energy storage spring crank arm 19 is driven to rotate and compress the energy storage spring assembly 400 to be in a straight line with the axis core of the isolation operating shaft 17. At this time, the front energy storage spring crank arm 19 and the energy storage spring limit cam 18 are coupled 102 and 103. The isolation operating shaft 17 is continued to be rotated to cross the straight line angle. The energy storage spring assembly 400 can release and extend its stored energy instantly, pushing the front energy storage spring crank arm 19 and the energy storage spring limit cam 18 that are coupled 102 and 103 together. At the same time, the isolation crank arm 10 of the output shaft assembly 300 is pulled through the slide groove connecting piece 21 to rotate the output shaft 11, thereby realizing the closing function of the isolation mechanism.

[0040] Specifically, Figures 1 to 6 As shown, when the output shaft 11 rotates, it drives the operating hole baffle 3 installed on its top 302 to rotate synchronously. When the mechanism is closed, the right end 303 of the operating hole baffle 1 blocks the grounding operating shaft 22, and the grounding mechanism cannot be operated, meeting the requirements of the five-protection interlocking in the power industry.

[0041] Specifically, Figures 1 to 6 As shown, when the outer hexagon 101 at the top of the isolation operation shaft 17 is rotated clockwise, the front energy storage spring crank arm 19 is driven to rotate and compress the energy storage spring assembly 400 to be in a straight line with the axis core of the isolation operation shaft 17. At this time, the front energy storage spring crank arm 19 and the energy storage spring limit cam 18 are coupled 102 and 104. The isolation operation shaft 17 is continued to rotate to cross the straight angle. The energy storage spring assembly 400 can release the storage capacity instantly and extend, pushing the front energy storage spring crank arm 19 and the energy storage spring limit cam 18 coupled 102 and 104 together. At the same time, the isolation crank arm 10 of the output shaft assembly 300 is pulled through the slide slot connecting piece 21 to rotate the output shaft 11, thereby realizing the isolation mechanism disconnection function. At this time, the operation hole baffle 3 rotates to give way 303 to release the limit of the grounding operation 22.

[0042] Specifically, Figures 1 to 8As shown, the grounding operating shaft assembly 200 includes a grounding operating shaft 22, a rear energy storage spring arm 23 and an energy storage spring limiting cam 23. The rear energy storage spring arm 23 is welded to the middle of the grounding operating shaft 22. The energy storage spring limiting cam 23 is sleeved on the bottom 202 of the isolation operating shaft 22. A pin 25 is provided on the upper part of the energy storage spring limiting cam 23, which is connected to the grounding arm 12 of the output shaft assembly 300 through a slide groove connecting piece 26. An outer hexagon 201 is provided on the top of the grounding operating shaft 22. When the outer hexagon 201 at the top of the grounding operating shaft 22 is rotated clockwise, the rear energy storage spring arm 23 is driven to rotate and compress the energy storage spring assembly 400 to be in a straight line with the axis core of the grounding operating shaft 22. At this time, the rear energy storage spring arm 23 and the energy storage spring limit cam 24 are coupled 204 and 203. The grounding operating shaft 22 continues to be rotated to cross the straight line angle. The energy storage spring assembly 400 releases and extends the stored energy instantly, pushing the rear energy storage spring arm 23 and the energy storage spring limit cam 24 coupled 204 and 203 together, and at the same time pulling the grounding arm 12 of the output shaft assembly 300 through the slide groove connecting piece 26 to rotate the output shaft 11, thereby realizing the closing function of the grounding mechanism.

[0043] Specifically, Figures 1 to 8 As shown, when the output shaft 11 rotates, it drives the operating hole baffle 3 installed on its top 302 to rotate synchronously. When the grounding mechanism is closed, the left end 304 of the operating hole baffle 3 blocks the isolation operating shaft 17, and the isolation mechanism cannot be operated, meeting the requirements of the five-protection interlocking in the power industry.

[0044] Specifically, Figures 1 to 8 As shown, when the outer hexagon 201 at the top of the grounding operation shaft 22 is rotated counterclockwise, the rear energy storage spring arm 23 is driven to rotate and compress the energy storage spring assembly 400 to be in a straight line with the core of the grounding operation shaft 22. At this time, the rear energy storage spring arm 23 and the energy storage spring limit cam 24 are coupled 204 and 205. The grounding operation shaft 22 is continued to rotate to cross the straight angle, and the energy storage spring assembly 400 is instantly released and extended, pushing the rear energy storage spring arm 23 and the energy storage spring limit cam 24 coupled 204 and 205 together, and at the same time, the grounding arm 12 of the output shaft assembly 300 is pulled through the slide slot connecting piece 26 to rotate the output shaft 11, thereby realizing the grounding mechanism disconnection function. At this time, the operating hole baffle rotates to give way to release the isolation operation limit. The three-position isolation operating mechanism of the ring main unit has a simple and reasonable structure, ingenious design, anti-misoperation, modular design, isolation spring and grounding spring are combined into one, with few parts, and the isolation and grounding opening and closing processes are completed by the spring energy release function, making the performance of the isolation switch more stable and reliable. In addition, it can be separated from the isolation switch body for maintenance, making maintenance faster and easier.

[0045] Specifically, Figure 1As shown, a support column 9 is provided between the front panel 1 and the rear panel 5. The support column 9 plays a supporting role and strengthens the connection between the front panel 1 and the rear panel 5.

[0046] Specifically, Figure 1 As shown, both ends of the output shaft assembly 300, the isolation operation shaft assembly 100 and the grounding operation shaft 22 assembly 200 are provided with copper sleeves and penetrate the concentric front panel 1 and the rear panel 5 through the copper sleeves.

[0047] In summary, a three-station isolation operating mechanism of a ring network cabinet of the present invention is achieved by respectively arranging an isolation operating shaft assembly and a grounding operating shaft assembly on both sides of an output shaft assembly, wherein the isolation operating shaft assembly and the grounding operating shaft assembly are connected in transmission via the output shaft assembly, and an energy storage spring assembly is connected between the isolation operating shaft assembly and the grounding operating shaft assembly, and an operating hole baffle is installed on the top of the output shaft assembly; the isolation operating shaft assembly is rotated counterclockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate to block the grounding operating shaft assembly, thereby closing the isolation mechanism; the isolation operating shaft assembly is rotated clockwise to close the isolation operating shaft assembly. The shaft assembly compresses the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate out of position to release the limit of the grounding operating shaft assembly, thereby realizing the opening of the isolation mechanism; the grounding operating shaft assembly is rotated clockwise, compresses the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate to block the isolation operating shaft assembly, thereby realizing the closing of the grounding mechanism; the grounding operating shaft assembly is rotated counterclockwise, compresses the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate out of position to release the limit of the isolation operating shaft assembly, thereby realizing the opening of the grounding mechanism. The entire structure is simple and reasonable, the design is ingenious, and it is anti-misoperation and modularly designed. The isolation opening and closing spring and the grounding opening and closing spring are combined into one, with fewer parts, and the isolation and grounding opening and closing processes are completed by the spring energy storage release function, making the performance of the isolation switch more stable and reliable. In addition, it can be separated from the isolation switch body for maintenance, making maintenance faster and easier.

[0048] The above examples are only used to further illustrate the technical content of the present invention, so that readers can understand it more easily, but they do not mean that the implementation of the present invention is limited to this. Any technical extension or re-creation made according to the present invention is protected by the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A three-station isolation operating mechanism for a ring main unit, characterized in that: It includes a front panel, a rear panel, an output shaft assembly, an energy storage spring assembly, an isolation operating shaft assembly, a grounding operating shaft assembly and an operation hole baffle, wherein the front panel and the rear panel are arranged in parallel to form a cavity, the output shaft assembly, the isolation operating shaft assembly and the grounding operating shaft assembly are all arranged in the cavity, the isolation operating shaft assembly and the grounding operating shaft assembly are respectively arranged on both sides of the output shaft assembly, the isolation operating shaft assembly and the grounding operating shaft assembly are connected by transmission through the output shaft assembly, the energy storage spring assembly is connected between the isolation operating shaft assembly and the grounding operating shaft assembly, and the operation hole baffle is installed on the top of the output shaft assembly; The isolation operating shaft assembly is rotated counterclockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operating hole baffle to rotate and block the grounding operating shaft assembly, thereby closing the isolation mechanism; Rotate the isolation operation shaft assembly clockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operation hole baffle to rotate and release the limit of the grounding operation shaft assembly, thereby realizing the opening of the isolation mechanism; Rotate the grounding operation shaft assembly clockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operation hole baffle to rotate and block the isolation operation shaft assembly, thereby closing the grounding mechanism; Rotate the grounding operation shaft assembly counterclockwise to compress the energy storage spring assembly so that the output shaft of the output shaft assembly rotates and drives the operation hole baffle to rotate to release the limit of the isolation operation shaft assembly, thereby realizing the opening of the grounding mechanism; The output shaft assembly comprises an output main shaft, and an isolation crank arm and a ground crank arm are respectively welded at both ends of the output main shaft, and a slotted mechanism output point is provided at the bottom end of the output main shaft; The energy storage spring assembly includes an energy storage spring and a two-stage telescopic guide shaft inserted through the center of the energy storage spring. Step sleeves for limiting the energy storage spring are respectively provided at both ends of the two-stage telescopic guide shaft. The step sleeves are respectively installed in contact with the isolation operating shaft assembly and the grounding operating shaft assembly.

2. A three-station isolation operating mechanism for a ring main unit according to claim 1, characterized in that: The isolation operating shaft assembly includes an isolation operating shaft, a front energy storage spring crank arm and an energy storage spring limiting cam. The front energy storage spring crank arm is welded in the middle of the isolation operating shaft, and the energy storage spring limiting cam is sleeved on the upper part of the isolation operating shaft. A pin is provided on the upper part of the energy storage spring limiting cam, which is connected to the isolation crank arm through a slide groove connecting piece. An external hexagon is provided on the top of the isolation operating shaft.

3. A three-station isolation operating mechanism for a ring main unit according to claim 1, characterized in that: The grounding operating shaft assembly includes a grounding operating shaft, a rear energy storage spring crank arm and an energy storage spring limiting cam. The rear energy storage spring crank arm is welded in the middle of the grounding operating shaft. The energy storage spring limiting cam is sleeved on the bottom of the isolation operating shaft. A pin is provided on the upper part of the energy storage spring limiting cam, which is connected to the grounding crank arm of the output shaft assembly through a slide groove connecting piece. An external hexagon is provided on the top of the grounding operating shaft.

4. The three-station isolation operating mechanism of a ring main unit according to claim 1 is characterized in that: A supporting column is arranged between the front panel and the rear panel.

5. The three-station isolation operating mechanism of a ring main unit according to claim 1 is characterized in that: Both ends of the output shaft assembly, the isolation operation shaft assembly and the grounding operation shaft assembly are provided with copper sleeves, and the copper sleeves penetrate the concentric front panel and the rear panel.

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