Gas-insulated ring main unit interlock device

Abstract

The invention discloses an interlocking device for a gas insulated ring network cabinet, comprising a cabinet body, a circuit breaker mechanism and an isolating mechanism. When an isolating clearance hole is rotated to a corresponding isolating switch working position and the circuit breaker is closed, the lower end of a first interlocking rod is inserted into the isolating clearance hole to prevent the isolating switch from being disconnected under power; the lower end of a second interlocking plate is pressed against a notch of a circuit breaker locking trigger block, and after the isolating switch is disconnected, the second interlocking plate lifts the second interlocking plate, so that the circuit breaker mechanism extends out of the interlocking plate and moves up to lock the circuit breaker to prevent the circuit breaker from being closed by mistake; after the isolating switch is closed, a cabinet door interlocking trigger arc block presses down a cabinet door interlocking roller, driving the cabinet door locking rod to be inserted into the cabinet door locking hole to prevent the cable room cabinet door from being opened, and avoids mistakenly entering the live interval, thereby meeting the requirements of the five-protection interlocking, and the structural design is simple and reasonable, the volume is small, and the stability is good.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage cabinet structures, and in particular to an interlocking device for a gas-insulated ring main unit (RMU). Background Art

[0002] Currently, there are few domestic manufacturers of environmentally friendly insulated cabinets. Most of the interlocking devices adopt soft interlocks, with complex structures, low reliability, high costs, and large occupied spaces. Summary of the Invention

[0003] An object of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide an interlocking device for a gas-insulated ring main unit (RMU), which can meet the requirements of five-prevention interlocking, has high reliability, a simple and reasonable structural design, a small volume, and saves space.

[0004] An interlocking device for a gas-insulated ring main unit (RMU) according to an embodiment of the first aspect of the present invention includes:

[0005] A cabinet body for support;

[0006] A circuit breaker mechanism installed in the cabinet body for triggering the opening and closing of the circuit breaker, including a first interlocking rod that will displace downward when the circuit breaker operates and a circuit breaker mechanism extended interlocking plate for locking the circuit breaker mechanism, and the circuit breaker mechanism extended interlocking plate is arranged at the bottom of the circuit breaker mechanism;

[0007] Isolation mechanism, including a front support plate and a rear support plate that are parallel to each other, a disconnector operating shaft, an earthing switch operating shaft, an interlock fixing plate, an isolation operating shaft sleeve, an earthing operating shaft sleeve, and a cabinet door interlock device; the disconnector operating shaft straddles between the front support plate and the rear support plate and is sleeved with a first gear; the earthing switch operating shaft straddles between the front support plate and the rear support plate and is sleeved with a second gear, and the second gear meshes with the first gear; the interlock fixing plate is fixed on the back of the front support plate and is provided with an isolation operation hole corresponding to the disconnector operating shaft and an earthing operation hole corresponding to the earthing switch operating shaft; the isolation operating shaft sleeve is sleeved on the front end of the disconnector operating shaft and corresponds to the isolation operation hole, and is provided with an isolation relief hole for the operating rod to insert; the earthing operating shaft sleeve is sleeved on the front end of the earthing switch operating shaft and corresponds to the earthing operation hole, and is provided with an earthing relief hole for the operating rod to insert; the earthing operation hole is located on the left side of the isolation operation hole, the left part of the earthing operation hole is correspondingly set as the earthing switch isolation position, and the right part of the earthing operation hole is correspondingly set as the earthing switch earthing position; the left part of the isolation operation hole is correspondingly set as the disconnector isolation position, and the right part of the isolation operation hole is correspondingly set as the disconnector working position; when the earthing relief hole rotates to correspond to the earthing switch earthing position, the isolation relief hole rotates to the left of the position corresponding to the disconnector isolation position; when the earthing relief hole rotates to correspond to the earthing switch isolation position, the isolation relief hole rotates to the position corresponding to the disconnector isolation position; when the earthing relief hole rotates to the left of the position corresponding to the earthing switch isolation position, the isolation relief hole rotates to the position corresponding to the disconnector working position; the lower end of the first interlock rod extends above the disconnector working position, and if the isolation relief hole rotates to the position corresponding to the disconnector working position and the circuit breaker is closed, the lower end of the first interlock rod is inserted into the isolation relief hole; the rear end of the disconnector operating shaft is provided with a circuit breaker locking trigger block, the circuit breaker locking trigger block is a circular block with a notch, a second interlock plate is fixed below the interlock plate extended by the circuit breaker mechanism, and the lower end of the second interlock plate presses against the notch of the circuit breaker locking trigger block; the cabinet door interlock device includes an intermediate fixing plate installed on the earthing switch operating shaft, a cabinet door interlock pressing plate connected to the intermediate fixing plate, and a cabinet door interlock trigger arc block connected to the cabinet door interlock pressing plate, a cable chamber cabinet door is arranged at the lower part of the cabinet body, a cabinet door locking hole is arranged at the top of the cable chamber cabinet door, a cabinet door locking rod fixed on the cabinet body is arranged above the cabinet door locking hole, and a cabinet door interlock roller located below the cabinet door interlock trigger arc block is arranged at the top of the cabinet door locking rod.

[0008] A gas-insulated ring main unit interlocking device according to an embodiment of the present invention has at least the following beneficial effects: By separately arranging a disconnector operating shaft and an earthing switch operating shaft, the disconnector operating shaft and the earthing switch operating shaft are linked through a first gear and a second gear, and an isolation operation hole and an earthing operation hole are arranged on the interlocking fixing plate. If the current state is powered on, that is, the disconnector is in the working state, the isolation relief hole is aligned with the working position of the disconnector and the earthing relief hole is aligned with the left side of the earthing switch isolation position, and the operating rod cannot be inserted into the earthing operation hole, preventing the earthing switch from being closed while energized; If power needs to be cut off, the circuit breaker needs to be disconnected first, then the operating rod is inserted into the isolation operation hole, and the operating rod is rotated counterclockwise so that the isolation relief hole is aligned with the isolation position of the disconnector. At the same time, the earthing relief hole also rotates to align with the isolation position of the earthing switch. At this time, the operating rod can be inserted into the earthing operation hole, and it is rotated clockwise so that the earthing relief hole is aligned with the earthing position of the earthing switch, and the isolation relief hole also rotates to align with the left side of the isolation position of the disconnector. At this time, it is in the earthed state and the isolation relief hole is misaligned with the isolation operation hole, and the operating rod cannot be inserted into the isolation operation hole, preventing the disconnector from being closed by mistake; When the isolation relief hole rotates to the corresponding working position of the disconnector and the circuit breaker is closed, the lower end of the first interlocking rod is inserted into the isolation relief hole to prevent the disconnector from being disconnected while energized; The lower end of the second interlocking plate presses against the notch of the circuit breaker locking trigger block. After the disconnector is disconnected, the second interlocking plate lifts the second interlocking plate, causing the circuit breaker mechanism to extend and the interlocking plate to move upward to lock the circuit breaker, preventing the circuit breaker from being closed by mistake; After the disconnector is closed, the cabinet door interlocking trigger arc block presses down the cabinet door interlocking roller, driving the cabinet door locking rod to be inserted into the cabinet door locking hole, preventing the cable chamber cabinet door from being opened, avoiding entering the live compartment by mistake, meeting the requirements of five-prevention interlocking, and having a simple and reasonable structural design, small volume and good stability.

[0009] According to some embodiments of the present invention, the front support plate and the rear support plate are fixedly connected by a support rod.

[0010] According to some embodiments of the present invention, a hole position baffle is further arranged between the front support plate and the interlocking fixing plate. The hole position baffle extends a push rod towards the front support plate. A horizontal long hole for the left and right movement of the push rod is arranged on the front support plate. When the push rod is pushed to the left side of the horizontal long hole, the hole position baffle blocks the earthing operation hole and exposes the isolation operation hole. When the push rod is pushed to the right side of the horizontal long hole, the hole position baffle blocks the isolation operation hole and exposes the earthing operation hole. By setting the hole position baffle, only the isolation operation hole or the earthing operation hole can be exposed each time, so that the operator can further clarify whether the disconnector or the earthing switch is being operated currently, avoiding mistakes.

[0011] According to some embodiments of the present invention, upper and lower positioning blocks are respectively arranged on the upper and lower sides of the hole position baffle. The upper parts of the front support plate, the upper positioning block, and the interlock fixing plate are fixed together by screws. The lower parts of the front support plate, the lower positioning block, and the interlock fixing plate are fixed together by screws. The upper positioning block, the lower positioning block, the front support plate, and the interlock fixing plate enclose a chamber for placing the hole position baffle.

[0012] According to some embodiments of the present invention, the isolation mechanism further includes an isolation microswitch and a grounding microswitch for controlling the status indicator light, a microswitch trigger plate for triggering the isolation microswitch and the grounding microswitch, and an auxiliary switch crank arm for driving the rotation of the microswitch trigger plate. The isolation microswitch and the grounding microswitch are fixed on the rear support plate through a microswitch mounting plate. Microswitch trigger blocks are arranged on the left and right sides of the microswitch trigger plate. The middle part of the microswitch trigger plate is hinged on the microswitch mounting plate. One end of the auxiliary switch crank arm is connected to the microswitch trigger plate, and the other end is connected to the rear end of the grounding switch operating shaft. When the grounding switch operating shaft rotates to switch the state, the microswitch trigger plate is driven to move through the auxiliary switch crank arm, so that the microswitch trigger block triggers the isolation microswitch or the grounding microswitch, realizing the state control of the indicator light.

[0013] According to some embodiments of the present invention, a first interlock reset mechanism is further included. The first interlock reset mechanism includes a first reset support rod and a first reset spring. A first long hole is arranged on the first interlock rod. One end of the first reset support rod is fixed on the cabinet body, and the other end passes through the first long hole and is connected to the first interlock rod through the first reset spring.

[0014] According to some embodiments of the present invention, a cabinet door locking and reset mechanism is further included. The cabinet door locking and reset mechanism includes a second reset support rod and a second reset spring fixed on the cabinet body. A second long hole is arranged on the cabinet door locking rod. A reset pin passing through the second long hole is arranged on the second reset support rod. The reset pin is connected to the cabinet door locking rod through the second reset spring. When the cabinet door interlock trigger arc block no longer presses down the cabinet door interlock roller, the cabinet door locking rod can be reset by the elastic force applied by the second reset spring and no longer inserted into the cabinet door locking hole. Description of the Drawings

[0015] The present invention will be further described below in conjunction with the drawings and embodiments;

[0016] Figure 1 It is an overall schematic diagram of an interlock device of a gas-insulated ring main unit according to an embodiment of the present invention;

[0017] Figure 2 Another perspective schematic diagram of the interlocking device for a gas-insulated ring main unit according to an embodiment of the present invention;

[0018] Figure 3 Interlocking schematic diagram of the interlocking device for a gas-insulated ring main unit according to an embodiment of the present invention;

[0019] Figure 4 Overall schematic diagram of the isolating mechanism of the interlocking device for a gas-insulated ring main unit according to an embodiment of the present invention;

[0020] Figure 5 Structural schematic diagram of the isolating mechanism of the interlocking device for a gas-insulated ring main unit according to an embodiment of the present invention;

[0021] Figure 6 Another perspective structural schematic diagram of the isolating mechanism of the interlocking device for a gas-insulated ring main unit according to an embodiment of the present invention;

[0022] Figure 7 Schematic diagram of the cabinet door interlocking device of the interlocking device for a gas-insulated ring main unit according to an embodiment of the present invention. Detailed implementation manners

[0023] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0025] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more. Understanding greater than, less than, exceeding, etc. does not include the present number, and understanding above, below, within, etc. includes the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0027] Reference Figures 1 - 5 , a gas-insulated ring main unit interlocking device according to an embodiment of the present invention includes:

[0028] A cabinet body 900 for support;

[0029] A circuit breaker mechanism 910 is installed in the cabinet body 900 and is used to trigger the opening and closing of the circuit breaker. It includes a first interlocking rod 911 that will displace downward when the circuit breaker operates and a circuit breaker mechanism extended interlocking plate 912 for locking the circuit breaker mechanism 910. The circuit breaker mechanism extended interlocking plate 912 is arranged at the bottom of the circuit breaker mechanism 910;

[0030] Isolation mechanism, including a front support plate 100 and a rear support plate 200 that are parallel to each other, a disconnector operating shaft 300, an earthing switch operating shaft 400, an interlock fixing plate 500, an isolation operating shaft sleeve 320, an earthing operating shaft sleeve 420, and a cabinet door interlock device; the disconnector operating shaft 300 straddles between the front support plate 100 and the rear support plate 200 and is sleeved with a first gear 310; the earthing switch operating shaft 400 straddles between the front support plate 100 and the rear support plate 200 and is sleeved with a second gear 410, and the second gear 410 meshes with the first gear 310; the interlock fixing plate 500 is fixed to the back of the front support plate 100 and is provided with an isolation operation hole 510 corresponding to the disconnector operating shaft 300 and an earthing operation hole 520 corresponding to the earthing switch operating shaft 400; the isolation operating shaft sleeve 320 is sleeved on the front end of the disconnector operating shaft 300 and corresponds to the isolation operation hole 510, and is provided with an isolation relief hole 321 for the operating rod to insert; the earthing operating shaft sleeve 420 is sleeved on the front end of the earthing switch operating shaft 400 and corresponds to the earthing operation hole 520, and is provided with an earthing relief hole 421 for the operating rod to insert; the earthing operation hole 520 is located on the left side of the isolation operation hole 510, the left part of the earthing operation hole 520 is correspondingly set as the earthing switch isolation position, and the right part of the earthing operation hole 520 is correspondingly set as the earthing switch earthing position; the left part of the isolation operation hole 510 is correspondingly set as the disconnector isolation position, and the right part of the isolation operation hole 510 is correspondingly set as the disconnector working position; when the earthing relief hole 421 rotates to correspond to the earthing switch earthing position, the isolation relief hole 321 rotates to the left of the corresponding disconnector isolation position; when the earthing relief hole 421 rotates to correspond to the earthing switch isolation position, the isolation relief hole 321 rotates to the corresponding disconnector isolation position; when the earthing relief hole 421 rotates to the left of the corresponding earthing switch isolation position, the isolation relief hole 321 rotates to the corresponding disconnector working position; the lower end of the first interlock rod 911 extends above the disconnector working position, and if the isolation relief hole 321 rotates to the corresponding disconnector working position and the circuit breaker is closed, the lower end of the first interlock rod 911 is inserted into the isolation relief hole 321; a circuit breaker locking trigger block 330 is provided at the rear end of the disconnector operating shaft 300, the circuit breaker locking trigger block 330 is a circular block with a notch, a second interlock plate 913 is fixed below the extension of the circuit breaker mechanism's interlock plate 912, and the lower end of the second interlock plate 913 presses against the notch of the circuit breaker locking trigger block 330;The cabinet door interlocking device comprises an intermediate fixing plate 810 mounted on the grounding switch operating shaft 400, a cabinet door interlocking pressure plate 820 connected to the intermediate fixing plate 810, and a cabinet door interlocking triggering arc block 830 connected to the cabinet door interlocking pressure plate 820. A cable room cabinet door 840 is provided at the lower part of the cabinet body 900. A cabinet door locking hole 841 is provided at the top of the cable room cabinet door 840. A cabinet door locking rod 850 fixed to the cabinet body 900 is provided above the cabinet door locking hole 841. A cabinet door interlocking roller 860 located below the cabinet door interlocking triggering arc block 830 is provided at the top of the cabinet door locking rod 850. ;

[0031] According to an interlocking device of a gas insulated ring main unit according to an embodiment of the present invention, an isolating switch operating shaft 300 and an earthing switch operating shaft 400 are respectively provided, and the isolating switch operating shaft 300 and the earthing switch operating shaft 400 are linked by a first gear 310 and a second gear 410, and an isolating operating hole 510 and an earthing operating hole 520 are provided on an interlocking fixing plate 500. If the isolating switch is currently in a power-on state, that is, the isolating switch is in a working state, the isolating clearance hole 321 is aligned with the isolating switch working position and the earthing clearance hole 421 is aligned with the left side of the earthing switch isolation position, and the operating rod cannot be inserted into the earthing operating hole 520, so as to prevent the earthing switch from being energized; if the power needs to be cut off, the operating rod needs to be inserted into the isolating operating hole 510 after the circuit breaker is disconnected, and the operating rod is rotated counterclockwise so that the isolating clearance hole 321 is aligned with the isolating switch isolation position, and the earthing clearance hole 421 is also rotated to align with the earthing switch isolation position. At this time, the operating rod can be inserted into the earthing operating hole 520, and rotated clockwise so that the earthing clearance hole 421 is aligned with the earthing switch earthing position, and at the same time When the isolating hole 321 is rotated to align with the left side of the isolating position of the isolating switch, it is in the grounding state and the isolating hole 321 is misaligned with the isolating operation hole 510, and the operating rod cannot be inserted into the isolating operation hole 510 to prevent the isolating switch from being closed by mistake; the isolating hole 321 is rotated to the corresponding isolating switch working position and the circuit breaker is closed, and the lower end of the first interlocking rod 911 is inserted into the isolating hole 321 to prevent the isolating switch from being disconnected with power on; the lower end of the second interlocking plate 913 is pressed against the circuit breaker locking trigger block 33 0, after the isolating switch is disconnected, the second interlocking plate 913 lifts up the second interlocking plate 913, so that the circuit breaker mechanism extends out of the interlocking plate 912 to move up and lock the circuit breaker to prevent the circuit breaker from being closed by mistake; after the isolating switch is closed, the cabinet door interlock triggers the arc block 830 to press down the cabinet door interlock roller 860, driving the cabinet door locking rod 850 to insert into the cabinet door locking hole 841, preventing the cable room cabinet door 840 from being opened, avoiding mistaken entry into the live interval, meeting the requirements of the five-protection interlock, and the structural design is simple and reasonable, small in size, and good in stability.

[0032] Reference Figure 4 In some embodiments according to the present invention, the front support plate 100 and the rear support plate 200 are connected and fixed by support rods.

[0033] Referring to Figure 5 and Figure 6 Figure 5 and Figure 6 , in some embodiments according to the present invention, a hole position baffle 600 is further provided between the front support plate 100 and the interlock fixing plate 500. The hole position baffle 600 extends a push rod 610 towards the front support plate 100. A horizontal long hole 110 for the left - right movement of the push rod 610 is provided on the front support plate 100. When the push rod 610 is pushed to the left side of the horizontal long hole 110, the hole position baffle 600 blocks the grounding operation hole 520 and exposes the isolation operation hole 510. When the push rod 610 is pushed to the right side of the horizontal long hole 110, the hole position baffle 600 blocks the isolation operation hole 510 and exposes the grounding operation hole 520. By setting the hole position baffle 600, only the isolation operation hole 510 or the grounding operation hole 520 can be exposed each time, so that the operator can further clarify whether the disconnector or the earthing switch being operated currently, avoiding mistakes.

[0034] Referring to Figure 5 and Figure 6 Figure 5 and Figure 6 , in some embodiments according to the present invention, an upper positioning block 620 and a lower positioning block 630 are respectively provided on the upper and lower sides of the hole position baffle 600. The upper parts of the front support plate 100, the upper positioning block 620 and the interlock fixing plate 500 are fixed together by screws. The lower parts of the front support plate 100, the lower positioning block 630 and the interlock fixing plate 500 are fixed together by screws. The upper positioning block 620, the lower positioning block 630, the front support plate 100 and the interlock fixing plate 500 enclose a chamber for placing the hole position baffle 600.

[0035] Referring to Figure 6 Figure 6 , in some embodiments according to the present invention, the isolation mechanism further includes an isolation micro - switch 710 and a grounding micro - switch 720 for controlling the status indicator lights, a micro - switch trigger plate 730 for triggering the isolation micro - switch 710 and the grounding micro - switch 720, and an auxiliary switch toggle arm 740 for driving the rotation of the micro - switch trigger plate 730. The isolation micro - switch 710 and the grounding micro - switch 720 are fixed on the rear support plate 200 through a micro - switch mounting plate 750. Micro - switch trigger blocks 731 are provided on the left and right sides of the micro - switch trigger plate 730. The middle part of the micro - switch trigger plate 730 is hinged on the micro - switch mounting plate 750. One end of the auxiliary switch toggle arm 740 is connected to the micro - switch trigger plate 730, and the other end is connected to the rear end of the earthing switch operating shaft 400. When the earthing switch operating shaft 400 rotates to switch the state, the micro - switch trigger plate 730 is driven to move through the auxiliary switch toggle arm 740, so that the micro - switch trigger block 731 triggers the isolation micro - switch 710 or the grounding micro - switch 720, realizing the control of the status of the indicator light.

[0036] Referring to Figure 2 and Figure 3, in some embodiments according to the present invention, it further includes a first interlock reset mechanism. The first interlock reset mechanism includes a first reset support rod 914 and a first reset spring 915. A first long hole 916 is provided on the first interlock rod 911. One end of the first reset support rod 914 is fixed on the cabinet 900, and the other end passes through the first long hole 916 and is connected to the first interlock rod 911 through the first reset spring 915.

[0037] Referring to Figure 1 and Figure 6 , in some embodiments according to the present invention, it further includes a cabinet door locking and reset mechanism. The cabinet door locking and reset mechanism includes a second reset support rod 870 fixed on the cabinet 900 and a second reset spring 880. A second long hole 851 is provided on the cabinet door locking rod 850. A reset pin 871 passing through the second long hole 851 is provided on the second reset support rod 870. The reset pin 871 is connected to the cabinet door locking rod 850 through the second reset spring 880. When the cabinet door interlock trigger arc block 830 no longer presses down the cabinet door interlock roller 860, the cabinet door locking rod 850 can be reset by the elastic force applied by the second reset spring 880 and no longer inserted into the cabinet door locking hole 841.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A gas-insulated ring main unit interlocking device, characterized in that, it includes: a cabinet body for support; a circuit breaker mechanism installed in the cabinet body for triggering the opening and closing of the circuit breaker, including a first interlocking rod that will displace downward when the circuit breaker operates and a circuit breaker mechanism extended interlocking plate for locking the circuit breaker mechanism, and the circuit breaker mechanism extended interlocking plate is arranged at the bottom of the circuit breaker mechanism; Isolation mechanism, including a front support plate and a rear support plate that are parallel to each other, a disconnector operating shaft, an earthing switch operating shaft, an interlock fixing plate, an isolation operating shaft sleeve, an earthing operating shaft sleeve, and a cabinet door interlock device; the disconnector operating shaft straddles between the front support plate and the rear support plate and is sleeved with a first gear; the earthing switch operating shaft straddles between the front support plate and the rear support plate and is sleeved with a second gear, and the second gear meshes with the first gear; the interlock fixing plate is fixed on the back of the front support plate and is provided with an isolation operation hole corresponding to the disconnector operating shaft and an earthing operation hole corresponding to the earthing switch operating shaft; the isolation operating shaft sleeve is sleeved on the front end of the disconnector operating shaft and corresponds to the isolation operation hole, and is provided with an isolation relief hole for the operating rod to insert; the earthing operating shaft sleeve is sleeved on the front end of the earthing switch operating shaft and corresponds to the earthing operation hole, and is provided with an earthing relief hole for the operating rod to insert; the earthing operation hole is located on the left side of the isolation operation hole, the left part of the earthing operation hole is correspondingly set as the earthing switch isolation station, and the right part of the earthing operation hole is correspondingly set as the earthing switch earthing station; the left part of the isolation operation hole is correspondingly set as the disconnector isolation station, and the right part of the isolation operation hole is correspondingly set as the disconnector working station; when the earthing relief hole rotates to correspond to the earthing switch earthing station, the isolation relief hole rotates to the left of the position corresponding to the disconnector isolation station; when the earthing relief hole rotates to correspond to the earthing switch isolation station, the isolation relief hole rotates to the position corresponding to the disconnector isolation station; when the earthing relief hole rotates to the left of the position corresponding to the earthing switch isolation station, the isolation relief hole rotates to the position corresponding to the disconnector working station; the lower end of the first interlock rod extends above the disconnector working station, and if the isolation relief hole rotates to the position corresponding to the disconnector working station and the circuit breaker is closed, the lower end of the first interlock rod inserts into the isolation relief hole; the rear end of the disconnector operating shaft is provided with a circuit breaker locking trigger block, the circuit breaker locking trigger block is a circular block with a notch, a second interlock plate is fixed below the interlock plate extended by the circuit breaker mechanism, and the lower end of the second interlock plate presses against the notch of the circuit breaker locking trigger block; the cabinet door interlock device includes an intermediate fixing plate installed on the earthing switch operating shaft, a cabinet door interlock pressure plate connected to the intermediate fixing plate, and a cabinet door interlock trigger arc block connected to the cabinet door interlock pressure plate, a cable chamber cabinet door is arranged at the lower part of the cabinet body, a cabinet door locking hole is arranged at the top of the cable chamber cabinet door, a cabinet door locking rod fixed on the cabinet body is arranged above the cabinet door locking hole, and a cabinet door interlock roller located below the cabinet door interlock trigger arc block is arranged at the top of the cabinet door locking rod.

2. A gas-insulated ring main unit interlock device according to claim 1, characterized in that the front support plate and the rear support plate are connected and fixed by a support rod.

3. A gas-insulated ring main unit interlocking device according to claim 1, characterized in that, a hole position baffle is further arranged between the front support plate and the interlocking fixed plate. The hole position baffle extends a push rod towards the front support plate. A horizontal long hole for the left and right movement of the push rod is arranged on the front support plate. When the push rod is pushed to the left side of the horizontal long hole, the hole position baffle blocks the grounding operation hole and exposes the isolation operation hole. When the push rod is pushed to the right side of the horizontal long hole, the hole position baffle blocks the isolation operation hole and exposes the grounding operation hole.

4. A gas-insulated ring main unit interlocking device according to claim 3, characterized in that, upper positioning blocks and lower positioning blocks are respectively arranged on the upper and lower sides of the hole position baffle. The upper parts of the front support plate, the upper positioning blocks and the interlocking fixed plate are fixed together by screws. The lower parts of the front support plate, the lower positioning blocks and the interlocking fixed plate are fixed together by screws. A chamber for placing the hole position baffle is formed by enclosing the upper positioning blocks, the lower positioning blocks, the front support plate and the interlocking fixed plate.

5. A gas-insulated ring main unit interlocking device according to claim 1, characterized in that, the isolation mechanism further includes an isolation microswitch and a grounding microswitch for controlling the status indicator lights, a microswitch trigger plate for triggering the isolation microswitch and the grounding microswitch, and an auxiliary switch crank arm for driving the rotation of the microswitch trigger plate. The isolation microswitch and the grounding microswitch are fixed on the rear support plate through a microswitch mounting plate. Microswitch trigger blocks are arranged on the left and right sides of the microswitch trigger plate. The middle part of the microswitch trigger plate is hinged on the microswitch mounting plate. One end of the auxiliary switch crank arm is connected to the microswitch trigger plate, and the other end is connected to the rear end of the grounding switch operating shaft.

6. A gas-insulated ring main unit interlocking device according to claim 1, characterized in that, it further includes a first interlocking reset mechanism. The first interlocking reset mechanism includes a first reset support rod and a first reset spring. A first long hole is arranged on the first interlocking rod. One end of the first reset support rod is fixed on the cabinet body, and the other end passes through the first long hole and is connected to the first interlocking rod through the first reset spring.

7. A gas-insulated ring main unit interlocking device according to claim 1, characterized in that, it further includes a cabinet door locking and reset mechanism. The cabinet door locking and reset mechanism includes a second reset support rod and a second reset spring fixed on the cabinet body. A second long hole is arranged on the cabinet door locking rod. A reset pin passing through the second long hole is arranged on the second reset support rod. The reset pin is connected to the cabinet door locking rod through the second reset spring.

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