Combined electric appliance switch cabinet with linkage interlocking function

Abstract

The invention relates to the field of switch cabinet equipment, in particular to a combined electric appliance switch cabinet with linkage interlocking, which comprises a cabinet body, the cabinet body is divided into an equipment chamber, an operation chamber and an electric control chamber by plates, the equipment chamber is sequentially provided with an isolating switch, a circuit breaker and a grounding switch from top to bottom, the operation chamber is internally provided with a linkage interlocking device, and the electric control chamber is internally provided with a linkage interlocking device. Electric control equipment is arranged in the electric control chamber; the linkage interlocking device comprises an installation support, an isolation switch control shaft, a circuit breaker control shaft and a grounding control shaft, the isolation switch control shaft rotatably controls opening and closing of an isolation switch, the circuit breaker control shaft rotatably controls opening and closing of a circuit breaker, and the grounding control shaft rotatably controls opening and closing of a grounding switch. The problem that safety accidents are easy to occur due to the fact that a traditional disconnecting switch, a traditional circuit breaker and a traditional grounding switch are operated independently is solved, the switch cabinet equipment can have a stable safety interlocking structure, and when one switch is switched on, other switches cannot be switched on or switched off.

Description

Technical Field

[0001] The present application relates to the field of switchgear equipment, and in particular to a combination electrical switchgear with linkage and interlocking. Background Art

[0002] To ensure the reliable operation of metal-enclosed switchgear and the personal safety of operators in high-voltage electrical equipment, the bypass center cabinet within the high-voltage cabinet primarily comprises operating components such as vacuum circuit breakers, disconnectors, and earthing switches, as well as measuring and protection components such as transformers, forming the power supply circuit. To prevent short circuits, electric shock, and equipment damage caused by misoperation, national regulations require the implementation of "five-prevention" interlocking requirements. Specifically, the bypass center cabinet must have five comprehensive misoperation prevention features: 1. Prevention of accidental opening and closing of the circuit breaker; 2. Prevention of accidental opening and closing of the disconnector while under load; 3. Prevention of accidental entry into live compartments; 4. Prevention of closing the earthing switch while energized; and 5. Prevention of closing the earthing switch while energized.

[0003] In existing circuit breakers, when power is cut off or repaired, the grounding switch is closed first, then the circuit breaker is opened, and then the isolating switch is opened. Or when power is turned on, the grounding switch is opened first, then the isolating switch is closed, and then the circuit breaker is closed. However, if the operator does not operate according to the standard sequence, when the isolating switch or the grounding switch is closed, another switch is operated to close, or a switch is operated to close but the shaft has not rotated successfully, and the next opening and closing operation is performed, the box will be energized, which will cause a great risk of electric shock due to leakage, resulting in a safety accident.

[0004] In view of this, the present invention provides a combination electrical switch cabinet with linkage and interlocking, which can solve the safety problem in the opening and closing process. Summary of the Invention

[0005] Based on this, it is necessary to propose a combination electrical switch cabinet with linkage and interlocking to address the problem that traditional disconnectors, circuit breakers and grounding switches operate independently of each other and are prone to safety accidents.

[0006] The present application provides a combination electrical switch cabinet with linkage and interlocking, comprising a cabinet body, wherein the cabinet body is divided into an equipment room, an operating room, and an electric control room by plates, wherein the equipment room is provided with an isolating switch, a circuit breaker, and an earthing switch in order from top to bottom, the operating room is provided with a linkage and interlocking device, and the electric control room is provided with electric control equipment; The linkage interlocking device includes a mounting bracket, an isolating switch control shaft, a circuit breaker control shaft and a grounding control shaft. The isolating switch control shaft rotates to control the opening and closing of the isolating switch, the circuit breaker control shaft rotates to control the opening and closing of the circuit breaker, and the grounding control shaft rotates to control the opening and closing of the grounding switch. A first interlocking device is provided between the disconnector control shaft and the grounding control shaft, and the first interlocking device is used to limit the rotation of the grounding control shaft. A second interlocking device is connected to the grounding control shaft, and the second interlocking device is used to limit the rotation of the circuit breaker control shaft. A third interlocking device is provided between the circuit breaker and the disconnector, and the third interlocking device is used to limit the opening and closing of the disconnector.

[0007] As one embodiment of the present invention, the mounting bracket includes an operating panel, a support plate and a connecting plate, the isolating switch control shaft, the circuit breaker control shaft and the grounding control shaft all pass through and are rotatably linked to the support plate and the connecting plate in sequence, and the operating panel is provided with an isolating switch port, a circuit breaker knob and a grounding switch port.

[0008] As one embodiment of the present invention, the isolating switch includes an isolating rotating shaft and multiple sets of isolating knives, an isolating knife crank arm piece is provided on the isolating switch control shaft, and a rotatable isolating linkage rod is provided between one end of the isolating rotating shaft and the isolating knife crank arm piece; The circuit breaker includes a circuit breaker rotating shaft and multiple groups of vacuum circuit breakers, the end of the circuit breaker control shaft is clamped on the circuit breaker rotating shaft, the circuit breaker control shaft is synchronously connected to the circuit breaker input shaft, and the circuit breaker input shaft is connected to the circuit breaker knob; The grounding switch includes a grounding shaft and multiple sets of grounding knives. A grounding knife crank arm piece is provided on the grounding control shaft. A rotatable grounding linkage rod is provided between the end of the grounding shaft and the grounding knife crank arm piece.

[0009] As an embodiment of the present invention, the first interlocking device includes a movable rod and a first return spring, the movable rod is slidably arranged on the connecting plate, the upper end of the movable rod is against the bottom of the isolation knife crook arm piece, the lower end of the first return spring is fixed on the movable rod, the upper end of the first return spring is fixed on the connecting plate, and a plurality of grounding limit grooves are provided on the grounding knife crook arm piece, and the movable rod is clamped in one of the grounding limit grooves under the squeezing of the isolation knife crook arm piece.

[0010] As one embodiment of the present invention, the second interlocking device includes a movable plate, which is slidably arranged on the support plate, and a coaxially rotating circuit breaker bend piece is provided on the grounding control shaft. The rotation of the circuit breaker bend piece pushes the movable plate to slide up and down, and a circuit breaker limit block is provided at the end of the circuit breaker input shaft. A limit baffle is provided at the upper end of the movable plate. When the grounding control shaft controls the grounding switch to close, the limit baffle abuts against the circuit breaker limit block, so that the circuit breaker control shaft cannot rotate.

[0011] As an embodiment of the present invention, the third interlocking device includes an isolation locking bend piece, an isolation locking movable rod and an isolation lock plate. The isolation locking movable rod is slidably arranged on the cabinet body, the isolation locking bend piece and the circuit breaker shaft are coaxially rotated, the isolation lock plate is arranged on the isolation shaft, and a plurality of isolation limit grooves are arranged on the isolation lock plate. A second reset spring is also provided on the isolation locking movable rod. The isolation locking bend piece rotates to push the isolation locking movable rod upward, and the upper end of the isolation locking movable rod is clamped in the isolation limit groove, so that the isolation shaft cannot rotate to close the switch.

[0012] As an embodiment of the present invention, it also includes a panel locking device, which includes a panel bend piece and a movable panel. The movable panel is slidably arranged on the back of the operating panel, and the panel bend piece is coaxially arranged on the circuit breaker control shaft. The panel bend piece rotates to drive the movable panel to rise and fall.

[0013] As an embodiment of the present invention, an isolation port shielding plate and a grounding port shielding plate are provided on the movable panel. When the circuit breaker control shaft rotates, that is, the circuit breaker is closed, the isolation port shielding plate blocks the isolation switch port, and the grounding port shielding plate blocks the grounding switch port.

[0014] As an embodiment of the present invention, it also includes a door lock device, which includes a door lock frame and a cabinet door synchronization plate, a sliding lock rod is slidably connected to the door lock frame, a door lock slot is provided on the cabinet door synchronization plate, a coaxially rotating door lock corner piece is provided on the grounding control shaft, a door lock pull rod is provided on the door lock corner piece, and the end of the door lock pull rod is connected to the sliding lock rod. When the grounding control shaft is not rotated to close the switch, the end of the sliding lock rod is clamped in the door lock slot, so that the cabinet door synchronization plate cannot move.

[0015] As one embodiment of the present invention, the door lock device also includes a door closing and unlocking plate, an inclined plate is provided on the cabinet door synchronization plate, the door closing and unlocking plate includes a sliding lifting plate and a pulley, the end of the sliding lifting plate is slidably clamped on the door lock frame, and the pulley rests on the inclined plate. When the cabinet door synchronization plate moves open, the sliding lifting plate blocks the grounding switch port.

[0016] Technical advantages of this application: 1. By setting the first interlocking device, when the disconnector is closed, the movable rod is connected to the grounding limit slot, making it impossible to manually rotate the grounding control shaft and the grounding switch cannot be opened or closed. This can prevent the equipment from being grounded with power on and causing electric shock accidents. 2. By setting a second interlock device, when the grounding switch is closed and in the maintenance state, the limit baffle of the movable plate is stuck with the circuit breaker limit block of the circuit breaker input shaft, and the circuit breaker cannot be manually rotated to open or close, preventing sudden power supply and high-voltage electric shock accidents; 3. By setting the third interlocking device, when the circuit breaker is closed, the isolation locking movable rod is clamped in the isolation limit slot, so that the isolation switch cannot be rotated to open or close, preventing live operation and safety accidents; 4. By setting a panel locking device, after the circuit breaker is closed, the isolating switch port and the grounding switch port are blocked through the movable panel, so that personnel cannot use tools to rotate the isolating switch control shaft and the grounding control shaft, preventing manual operation under power; 5. By setting a door lock device, when the grounding switch is not turned on, that is, when it is not grounded, the door lock slot can be blocked by sliding the lock rod, and the cabinet door cannot be opened to prevent the door from being opened with power on and causing electric shock; 6. After the grounding switch is turned and closed, the sliding lock rod moves out of the door lock slot, and the cabinet door synchronization plate can move. That is, after the door is opened, the sliding lifting plate slides down to block the grounding switch port to prevent the grounding switch from being disconnected when the door is open and the equipment is suddenly powered on, which may cause an electric shock accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of this application and make other features, purposes and advantages of this application more apparent. The drawings and descriptions of the exemplary embodiments of this application are used to explain this application and do not constitute an improper limitation on this application.

[0018] Figure 1 This is a three-dimensional diagram of a combination electrical switch cabinet with linkage and interlocking in this application.

[0019] Figure 2 This is the internal layout diagram of the combined electrical switch cabinet with linkage and interlocking for this application.

[0020] Figure 3 This is a schematic internal perspective view of the switch cabinet of this application.

[0021] Figure 4 For this application Figure 3 A magnified view of the structure of part A.

[0022] Figure 5 For this application Figure 3 A magnified view of the structure of part B.

[0023] Figure 6 For this application Figure 3 A magnified view of the structure of part C in FIG.

[0024] Figure 7This is a front structural schematic diagram of the linkage interlocking device of this application.

[0025] Figure 8 This is a schematic diagram of the overall structure of the linkage interlocking device of this application.

[0026] Figure 9 For this application Figure 8 A magnified view of the structure of part D in FIG.

[0027] Figure 10 For this application Figure 8 A magnified view of the structure of part E in FIG.

[0028] Figure 11 This is a schematic structural diagram of the panel locking device and door locking device of this application.

[0029] Figure 12 This is a diagram showing the panel locking device and door locking device of the present application in use.

[0030] Figure 13 This is a schematic diagram of the changing state of the linkage interlocking device of this application.

[0031] Reference numerals: cabinet 1; equipment room 100; operation room 200; electric control room 300; Isolating switch 11; isolating shaft 111; isolating knife 112; Circuit breaker 12; circuit breaker shaft 121; vacuum circuit breaker 122; Grounding switch 13; grounding shaft 131; grounding knife 132; Interlocking device 2; mounting bracket 20; operation panel 201; disconnect switch port 2011; circuit breaker knob 2012; grounding switch port 2013; support plate 202; connecting plate 203; Isolating switch control shaft 21; Isolating knife arm piece 211; Isolating linkage rod 212; Circuit breaker control shaft 22; circuit breaker input shaft 221; circuit breaker limit block 2211; Grounding control shaft 23; grounding knife arm piece 231; grounding limit slot 2310; grounding linkage rod 232; circuit breaker bend piece 233; First interlocking device 3; movable rod 31; limit buckle 311; first return spring 32; Second interlocking device 4; movable plate 41; limiting baffle 411; The third interlocking device 5; the isolation locking bend piece 51; the isolation locking movable rod 52; the isolation locking plate 53; the isolation limiting groove 530; the second return spring 54; Panel locking device 6; panel bend piece 61; movable panel 62; isolation port shielding plate 621; grounding port shielding plate 622; Door lock device 7; door lock frame 70; sliding lock rod 701; door lock bend piece 702; door lock pull rod 703; cabinet door synchronization plate 71; door lock slot 710; inclined plate 711; door closing and unlocking plate 73; sliding lifting plate 731; pulley 732. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0033] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0034] In the present invention, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connections, removable connections, or integration; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or interactions between two components. However, the term "direct connection" indicates that the two connected entities are not connected through a transitional structure, but are connected solely through a connecting structure to form a single entity. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0035] like Figures 1 to 13 As shown, the present application provides a combination electrical switch cabinet with interlocking, which is used to solve the problem that traditional isolating switches, circuit breakers and grounding switches operate independently of each other and are prone to safety accidents. In order to achieve a stable safety interlock structure for the equipment, when one of the switches is closed, the other switches cannot be opened or closed.

[0036] like Figure 1-Figure 2 As shown, in one embodiment of the present application: The present application provides a combination electrical switch cabinet with linkage and interlocking, comprising a cabinet body 1, which is divided into an equipment room 100, an operating room 200, and an electric control room 300 by plates. The equipment room 100 is provided with an isolating switch 11, a circuit breaker 12, and an earthing switch 13 in order from top to bottom. The operating room 200 is provided with a linkage and interlocking device 2, and the electric control room 300 is provided with electric control equipment. like Figure 4-Figure 7As shown: The interlocking interlocking device 2 of the present invention includes a mounting bracket 20, an isolating switch control shaft 21, a circuit breaker control shaft 22 and a grounding control shaft 23. The isolating switch control shaft 21 rotates to control the opening and closing of the isolating switch 11, the circuit breaker control shaft 22 rotates to control the opening and closing of the circuit breaker 12, and the grounding control shaft 23 rotates to control the opening and closing of the grounding switch 13.

[0037] like Figure 4 and Figure 8 As shown, in order to prevent the grounding switch 13 from opening and closing when the disconnector 11 is closed, a first interlocking device 3 is provided between the disconnector control shaft 21 and the grounding control shaft 23. The first interlocking device 3 is used to limit the rotation of the grounding control shaft 23. The grounding control shaft 23 is connected to a second interlocking device 4. The second interlocking device 4 is used to limit the rotation of the circuit breaker control shaft 22. A third interlocking device 5 is provided between the circuit breaker 12 and the disconnector 11. The third interlocking device 5 is used to limit the opening and closing of the disconnector 11.

[0038] like Figure 3 、 Figure 4 and Figure 6 As shown, the mounting bracket 20 includes an operation panel 201, a support plate 202 and a connecting plate 203. The operation panel 201 mainly faces the operator. The operation panel 201 is provided with an isolating switch port 2011, a circuit breaker knob 2012 and a grounding switch port 2013. The isolating switch port 2011, the circuit breaker knob 2012 and the grounding switch port 2013 are all displayed with prompts for the rotation direction of opening and closing, indicating which direction of rotation will result in closing or opening.

[0039] The circuit breaker knob 2012 can be used to open and close the circuit breaker. The isolating switch control shaft 21 can be rotated from the isolating switch port 2011 to control the opening and closing of the isolating switch 11. The grounding control shaft 23 can be rotated from the grounding switch port 2013 to control the opening and closing of the grounding switch 13.

[0040] There are two support plates 202, which are mainly used to support the main components inside. The connecting plate 230 is mainly fixedly connected to the cabinet 1 near the circuit breaker.

[0041] All the disconnector control shafts 21 , circuit breaker control shafts 22 and grounding control shafts 23 pass through and are rotatably connected to the support plate 202 and the connecting plate 203 in sequence.

[0042] like Figure 3 and Figure 4As shown, the isolating switch 11 includes an isolating shaft 111 and three sets of isolating switches 112. The isolating shaft 111 rotates to control the connection or disconnection of the three sets of isolating switches 112 and the busbars. An isolating switch control shaft 21 is provided with an isolating switch arm 211. A rotatable isolating linkage rod 212 is provided between one end of the isolating shaft 111 and the isolating switch arm 211. like Figure 3 、 Figure 4 、 Figure 5 As shown, the circuit breaker 12 includes a circuit breaker shaft 121 and three groups of vacuum circuit breakers 122. The end of the circuit breaker control shaft 22 is clamped on the circuit breaker shaft 121. The circuit breaker control shaft 22 is synchronously connected to the circuit breaker input shaft 221. The circuit breaker input shaft 221 is connected to the circuit breaker knob 2012.

[0043] The overall control process is that the circuit breaker knob 2012 is used to input the opening and closing operation, which is converted through the circuit breaker input shaft 221 and the internal mechanism to make the circuit breaker control shaft 22 rotate to control the circuit breaker shaft 121.

[0044] The circuit breaker input shaft 221 and the circuit breaker control shaft 22 are in a progressive transmission relationship. When the circuit breaker input shaft 221 cannot rotate, the circuit breaker control shaft 22 cannot rotate to control the circuit breaker rotating shaft 121.

[0045] like Figure 6 As shown, the grounding switch 13 includes a grounding shaft 131 and multiple sets of grounding knives 132. A grounding knife arm piece 231 is provided on the grounding control shaft 23, and a rotatable grounding linkage rod 232 is provided between the end of the grounding shaft 131 and the grounding knife arm piece 231.

[0046] In order to prevent the grounding switch 13 from closing and grounding when the isolating switch 11 is closed, that is, when the circuit is connected, it is necessary to limit the closing of the grounding switch 13, so the first interlocking device 3 is provided.

[0047] like Figure 4 、 Figure 8 、 Figure 9 As shown, the first interlocking device 3 includes a movable rod 31 and a first return spring 32. The movable rod 31 is slidably arranged on the connecting plate 203. In the present invention, a plurality of limit buckles 311 are mainly buckled on the movable rod 31 so that the movable rod 31 can only move up and down.

[0048] The upper end of the movable rod 31 rests against the bottom of the isolation knife crook arm piece 211, the lower end of the first return spring 32 is fixed on the movable rod 31, the upper end of the first return spring 32 is fixed on the connecting plate 203, and a plurality of grounding limit grooves 2310 are provided on the grounding knife crook arm piece 231. The movable rod 31 is clamped in one of the grounding limit grooves 2310 under the squeezing of the isolation knife crook arm piece 211.

[0049] The first return spring 32 pulls the movable rod 31 to provide an upward pulling force, so that the movable rod 31 is in a separated state from the grounding limit groove 2310 under normal conditions. That is, only when the disconnector 11 is closed, the movable rod 31 will be stuck in the grounding limit groove 2310 to prevent the grounding switch 13 from closing.

[0050] Specifically, such as Figure 4 and Figure 7 As shown, when the isolation knife arm 211 rotates clockwise, the isolation linkage rod 212 is pulled up to make the isolation knife 112 rotate to open the switch, and rotate counterclockwise to close the switch. Figure 8 and Figure 9 As shown, when the isolation knife arm 211 rotates clockwise to open the switch, the first reset spring 32 pulls the movable rod 31 to move upward, and the movable rod 31 is not stuck in the grounding limit groove 2310, and there is no restriction on the grounding switch. When the isolating knife arm 211 rotates counterclockwise, the isolating linkage rod 212 is pulled downward, causing the isolating knife 112 to rotate and close. At this time, the isolating knife arm 211 squeezes the movable rod 31 to slide downward, and causes the movable rod 31 to be engaged in the grounding limit slot 2310, so that the grounding control shaft 23 cannot rotate. That is, when the isolating switch 11 is closed, the grounding switch 13 cannot rotate for opening and closing operations, mainly to prevent the grounding switch 13 from closing, to avoid grounding the equipment when it is energized, which may cause electric shock accidents.

[0051] In order to prevent sudden power supply when the grounding switch 13 is closed, that is, during maintenance, it is necessary to prohibit the circuit breaker closing operation, so a second interlocking device 4 is provided, such as Figure 8 As shown, the second interlocking device 4 includes a movable plate 41, which is slidably arranged on the support plate 202. The movable plate 41 is provided with multiple sliding grooves and is fixed to the support plate 202 by bolts. The movable plate 41 slides up and down along the support plate 202.

[0052] A coaxially rotating circuit breaker bend piece 233 is provided on the grounding control shaft 23, and the bottom of the movable plate 41 is abutted against the circuit breaker bend piece 233. The rotation of the circuit breaker bend piece 233 pushes the movable plate 41 to slide up and down. A circuit breaker limit block 2211 is provided at the end of the circuit breaker input shaft 221, and a limit baffle 411 is provided at the upper end of the movable plate 41. When the grounding control shaft 23 controls the grounding switch 13 to close, the limit baffle 411 abuts against the circuit breaker limit block 2211, preventing the circuit breaker control shaft 22 from rotating.

[0053] Specific principles, such as Figure 7 and Figure 8 As shown, when the grounding control shaft 23 rotates clockwise, the grounding switch is in the open state, the equipment is not grounded, the movable plate 41 rests on the low point of the circuit breaker bend 233, and the limit baffle 411 and the circuit breaker limit block 2211 are not in contact; When the grounding control shaft 23 rotates counterclockwise, the circuit breaker bend piece 233 rotates and pushes the movable plate 41 upward, so that the limit baffle 411 blocks the rotation path of the circuit breaker limit block 2211, thereby preventing the circuit breaker input shaft 221 from rotating, and thus the circuit breaker control shaft 22 cannot rotate to control the circuit breaker shaft 121.

[0054] The purpose of providing the second interlocking device 4 is that when the grounding switch 13 is closed and in the maintenance state, the limit baffle 411 of the movable plate 41 clamps the circuit breaker limit block 2211 of the circuit breaker input shaft, thereby limiting the rotation of the circuit breaker input shaft 221, so that the circuit breaker control shaft 22 rotates to control the circuit breaker shaft 121, and the circuit breaker 12 cannot be manually rotated to open or close, thereby preventing sudden power supply and high-voltage electric shock accidents, thereby playing a safety protection role.

[0055] After the circuit breaker 12 is closed, in order to prevent the disconnector 11 from opening and closing operations, which is in a live state at this time and prohibits other switches from opening and closing operations, a third interlocking device 5 is provided.

[0056] Specifically, such as Figure 3 、 Figure 5 、 Figure 8 As shown, the third interlocking device 5 includes an isolation locking bend piece 51, an isolation locking movable rod 52 and an isolation lock plate 53. The isolation locking movable rod 52 is slidably set on the cabinet 1, and the isolation locking bend piece 51 and the circuit breaker shaft 121 are coaxially rotated. The isolation lock plate 53 is set on the isolation shaft 111, and a plurality of isolation limit grooves 530 are set on the isolation lock plate 53. The isolation locking movable rod 52 is also provided with a second reset spring 54. The second reset spring 54 provides a downward pulling force. Under normal conditions, the second reset spring 54 pulls the isolation locking movable rod 52 away from the isolation limit groove 530.

[0057] However, when the circuit breaker 12 is closed, that is, when the circuit breaker shaft 121 rotates, the high point of the isolation locking bend 51 pushes the isolation locking movable rod 52 to move upward, and the upper end of the isolation locking movable rod 52 is engaged in the isolation limit groove 530, so that the isolation shaft 111 cannot rotate to open or close the circuit breaker. In this way, the operation of the isolation switch 11 can be restricted to prevent live operation when the circuit of the entire equipment is connected, thereby preventing accidents.

[0058] In order to further prevent the disconnector 11 and the earthing switch 13 from opening and closing when the circuit breaker 12 is closed, a panel locking device 6 is provided.

[0059] like Figure 11 and Figure 12 As shown, the panel locking device 6 includes a panel bend piece 61 and a movable panel 62. The movable panel 62 is slidably arranged on the back of the operating panel 201. The panel bend piece 61 is coaxially arranged on the circuit breaker control shaft 22. The top of the panel bend piece 61 is clamped on the movable panel and has a linked movement. The rotation of the panel bend piece 61 drives the movable panel 62 to rise and fall.

[0060] An isolation port shielding plate 621 and a grounding port shielding plate 622 are provided on the movable panel 62. When the circuit breaker control shaft 22 rotates, that is, the circuit breaker 12 is closed, the isolation port shielding plate 621 blocks the isolation switch port 2011, and the grounding port shielding plate 622 blocks the grounding switch port 2013.

[0061] like Figure 7 and Figure 11 As shown: the circuit breaker knob 2012 rotates counterclockwise to close the circuit, the circuit breaker 12 is closed, and the circuit is in a connected state. At this time, the high voltage is connected and no operation can be performed. At this time, the circuit breaker control shaft 22 also rotates counterclockwise, causing the panel bend 61 to rotate upward and the movable panel 62 to move upward. At this time, the isolation port baffle 621 blocks the isolation switch port 2011, and the grounding port baffle 622 blocks the grounding switch port 2013, so that any operation is prohibited on the isolation switch control shaft 21 and the grounding control shaft 23. When the circuit breaker is closed, live operation is prohibited, which has a protective effect.

[0062] like Figure 7 and Figure 12 As shown: the circuit breaker knob 2012 rotates clockwise to open the circuit, and the circuit breaker 12 is opened to disconnect the circuit. At this time, the circuit breaker control shaft 22 also rotates clockwise, causing the panel bend 61 to rotate downward and the movable panel 62 to move downward. At this time, the isolation port shielding plate 621 on the movable panel 62 is away from the isolation switch port 2011, and the grounding port shielding plate 622 is away from the grounding switch port 2013, so that the isolation switch control shaft 21 and the grounding control shaft 23 can operate normally.

[0063] When maintenance is required, a door lock device 7 is provided to prevent the door from being opened directly when the grounding switch 13 is not closed, or to prevent the door from being opened directly when the grounding switch 13 is not closed. After power is supplied, the cabinet door is wide open, the cabinet body is connected to the outside, and a leakage accident occurs.

[0064] Specifically, such as Figure 8 、 Figure 10 、 Figure 13 As shown, the door lock device 7 includes a door lock frame 70 and a cabinet door synchronization plate 71. The cabinet door synchronization plate 71 is fixed on the cabinet door and keeps opening and closing synchronously with the cabinet door.

[0065] A sliding lock rod 701 is slidably connected to the door lock frame 70, and a door lock slot 710 is provided on the cabinet door synchronization plate 71. The sliding lock rod 701 slides left and right, mainly to engage with the door lock slot 710. The sliding lock rod 701 blocks the door lock slot 710, and the cabinet door cannot be opened.

[0066] The device for controlling the movement of the sliding lock rod 701 is set on the grounding control shaft to ensure that when the grounding switch 13 is closed and grounded, the sliding lock rod 701 is away from the door lock slot 710. When the grounding switch 13 is opened and disconnected, the sliding lock rod 701 blocks the door lock slot 710 and the cabinet door cannot be opened.

[0067] Specifically, such as Figure 10 As shown, a coaxially rotating door lock corner piece 702 is provided on the grounding control shaft 23, and a door lock pull rod 703 is provided on the door lock corner piece 702. The end of the door lock pull rod 703 is connected to the sliding lock rod 701. When the grounding control shaft 23 is not rotated to close the switch, the end of the sliding lock rod 701 is clamped in the door lock slot 710, so that the cabinet door synchronization plate 71 cannot move.

[0068] In order to prevent the grounding switch 13 from being opened directly when the cabinet door is not closed properly, the door lock device 7 is also provided with a door closing and unlocking plate 73, and an inclined plate 711 is provided on the cabinet door synchronization plate 71. The door closing and unlocking plate 73 includes a sliding lifting plate 731 and a pulley 732. The end of the sliding lifting plate 731 is slidably clamped on the door lock frame 70, and the pulley 732 rests on the inclined plate 711. When the cabinet door synchronization plate 71 moves to open, the sliding lifting plate 731 blocks the grounding switch port 2013.

[0069] like Figure 8 and Figure 13 As shown, when the cabinet door is not opened, the inclined plate 711 on the cabinet door synchronization plate 71 presses against the pulley 732, so that the sliding lifting plate 731 is in a high position, and the sliding lifting plate 731 is away from the grounding switch port 2013. The grounding control shaft 23 can operate normally and the grounding switch can be closed.

[0070] When the cabinet door is opened, the cabinet door synchronization plate 71 moves away from the pulley 732, and the sliding lifting plate 731 slides downward under the action of gravity, blocking the grounding switch port 2013. The grounding control shaft 23 cannot perform any operation, and the grounding switch cannot be opened.

[0071] In the present invention, by setting a first interlock device, when the disconnector is closed and connected, the movable rod is clamped on the grounding limit slot, so that the grounding control shaft cannot be rotated manually, and the grounding switch cannot be opened or closed, which can prevent the equipment from being grounded with power on and causing electric shock accidents; by setting a second interlock device, when the grounding switch is closed and is in a maintenance state, the limit baffle of the movable plate clamps the circuit breaker limit block of the circuit breaker input shaft, and the circuit breaker cannot be rotated to open or close manually, preventing sudden power supply and high-voltage electric shock accidents; by setting a third interlock device, when the circuit breaker is closed, the isolation locking movable rod is clamped in the isolation limit slot, so that the disconnector cannot be rotated to open or close, preventing live operation and generating a safety Accidents; by setting up a panel locking device, after the circuit breaker is closed, the isolating switch port and the grounding switch port are blocked through the movable panel, so that personnel cannot use tools to rotate the isolating switch control shaft and the grounding control shaft, preventing manual operation with power on; by setting up a door lock device, when the grounding switch is not turned to close, that is, when it is not grounded, the door lock slot is blocked by the sliding lock rod, and the cabinet door cannot be opened, preventing the door from being opened with power on and causing electric shock; after the grounding switch is turned to close, the sliding lock rod is removed from the door lock slot, and the cabinet door synchronization plate can be moved, that is, after the door is opened, the sliding lifting plate slides down and blocks the grounding switch port, preventing the grounding switch from being disconnected when the door is open and the equipment from suddenly being energized, thereby causing electric shock accidents.

[0072] The various technical features of the above-described embodiments can be combined arbitrarily, and the execution order of the method steps is not restricted. In order to make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A combination electrical switch cabinet with linkage interlocking, characterized in that: The cabinet (1) comprises a cabinet body (1), wherein the cabinet body (1) is divided into an equipment room (100), an operation room (200) and an electric control room (300) by a plate material, wherein the equipment room (100) is provided with an isolating switch (11), a circuit breaker (12) and an earthing switch (13) in order from top to bottom, wherein a linkage interlocking device (2) is provided in the operation room (200), and an electric control device is provided in the electric control room (300); The linkage interlocking device (2) comprises a mounting bracket (20), an isolating switch control shaft (21), a circuit breaker control shaft (22) and a grounding control shaft (23); the isolating switch control shaft (21) rotates to control the opening and closing of the isolating switch (11); the circuit breaker control shaft (22) rotates to control the opening and closing of the circuit breaker (12); and the grounding control shaft (23) rotates to control the opening and closing of the grounding switch (13); A first interlocking device (3) is arranged between the disconnector control shaft (21) and the grounding control shaft (23), the first interlocking device (3) being used to limit the rotation of the grounding control shaft (23), a second interlocking device (4) is connected to the grounding control shaft (23), the second interlocking device (4) being used to limit the rotation of the circuit breaker control shaft (22), and a third interlocking device (5) is arranged between the circuit breaker (12) and the disconnector (11), the third interlocking device (5) being used to limit the opening and closing of the disconnector (11).

2. The combined electrical switch cabinet with linkage interlocking according to claim 1 is characterized in that: The mounting bracket (20) comprises an operating panel (201), a support plate (202) and a connecting plate (203); the isolating switch control shaft (21), the circuit breaker control shaft (22) and the grounding control shaft (23) are all sequentially passed through and rotatably connected to the support plate (202) and the connecting plate (203); and the operating panel (201) is provided with an isolating switch port (2011), a circuit breaker knob (2012) and a grounding switch port (2013).

3. The combined electrical switch cabinet with linkage interlocking according to claim 2 is characterized in that: The isolating switch (11) comprises an isolating rotating shaft (111) and a plurality of isolating knives (112); an isolating knife turning arm piece (211) is arranged on the isolating switch control shaft (21); and an isolating linkage rod (212) that can rotatably move is arranged between one end of the isolating rotating shaft (111) and the isolating knife turning arm piece (211); The circuit breaker (12) comprises a circuit breaker rotating shaft (121) and a plurality of groups of vacuum circuit breakers (122); an end of the circuit breaker control shaft (22) is clamped on the circuit breaker rotating shaft (121); the circuit breaker control shaft (22) is synchronously connected to a circuit breaker input shaft (221); and the circuit breaker input shaft (221) is connected to the circuit breaker knob (2012); The grounding switch (13) comprises a grounding rotating shaft (131) and a plurality of grounding knives (132). A grounding knife crook arm piece (231) is provided on the grounding control shaft (23). A rotatable grounding linkage rod (232) is provided between the end of the grounding rotating shaft (131) and the grounding knife crook arm piece (231).

4. The combined electrical switch cabinet with linkage interlocking according to claim 3 is characterized in that: The first interlocking device (3) comprises a movable rod (31) and a first return spring (32); the movable rod (31) is slidably arranged on the connecting plate (203); the upper end of the movable rod (31) abuts against the lower side of the isolation knife crook arm piece (211); the lower end of the first return spring (32) is fixed on the movable rod (31); the upper end of the first return spring (32) is fixed on the connecting plate (203); a plurality of grounding limit grooves (2310) are arranged on the grounding knife crook arm piece (231); the movable rod (31) is clamped in one of the grounding limit grooves (2310) under the pressure of the isolation knife crook arm piece (211).

5. The combined electrical switch cabinet with linkage interlocking according to claim 4 is characterized in that: The second interlocking device (4) comprises a movable plate (41), the movable plate (41) being slidably arranged on the support plate (202), the grounding control shaft (23) being provided with a coaxially rotating circuit breaker bend piece (233), the rotation of the circuit breaker bend piece (233) pushing the movable plate (41) to slide up and down, the end of the circuit breaker input shaft (221) being provided with a circuit breaker limit block (2211), the upper end of the movable plate (41) being provided with a limit baffle (411), when the grounding control shaft (23) controls the grounding switch (13) to close, the limit baffle (411) abuts against the circuit breaker limit block (2211), so that the circuit breaker control shaft (22) cannot rotate.

6. The combined electrical switch cabinet with linkage interlocking according to claim 5, characterized in that: The third interlocking device (5) comprises an isolation locking bend piece (51), an isolation locking movable rod (52) and an isolation locking plate (53); the isolation locking movable rod (52) is slidably arranged on the cabinet (1); the isolation locking bend piece (51) and the circuit breaker rotating shaft (121) are coaxially rotatably arranged; the isolation locking plate (53) is arranged on the isolation rotating shaft (111); a plurality of isolation limiting grooves (530) are arranged on the isolation locking plate (53); a second reset spring (54) is also arranged on the isolation locking movable rod (52); the isolation locking bend piece (51) rotates to push the isolation locking movable rod (52) upward; the upper end of the isolation locking movable rod (52) is clamped in the isolation limiting groove (530), so that the isolation rotating shaft (111) cannot rotate to close the switch.

7. The combined electrical switch cabinet with linkage interlocking according to claim 6, characterized in that: The invention also comprises a panel locking device (6), wherein the panel locking device (6) comprises a panel bend piece (61) and a movable panel (62), wherein the movable panel (62) is slidably arranged on the back of the operating panel (201), and the panel bend piece (61) is coaxially arranged on the circuit breaker control shaft (22), and the panel bend piece (61) rotates to drive the movable panel (62) to rise and fall.

8. The combined electrical switch cabinet with linkage interlocking according to claim 7, characterized in that: An isolation port baffle (621) and a grounding port baffle (622) are provided on the movable panel (62); when the circuit breaker control shaft (22) rotates, that is, when the circuit breaker (12) is closed, the isolation port baffle (621) blocks the isolation switch port (2011), and the grounding port baffle (622) blocks the grounding switch port (2013).

9. The combined electrical switch cabinet with linkage interlocking according to claim 8, characterized in that: The invention also comprises a door lock device (7), wherein the door lock device (7) comprises a door lock frame (70) and a cabinet door synchronization plate (71); a sliding lock rod (701) is slidably connected to the door lock frame (70); a door lock slot (710) is provided on the cabinet door synchronization plate (71); a door lock bend piece (702) that rotates coaxially is provided on the grounding control shaft (23); a door lock pull rod (703) is provided on the door lock bend piece (702); an end of the door lock pull rod (703) is connected to the sliding lock rod (701); when the grounding control shaft (23) is not rotated to close the switch, the end of the sliding lock rod (701) is clamped in the door lock slot (710), so that the cabinet door synchronization plate (71) cannot move.

10. The combined electrical switch cabinet with linkage interlocking according to claim 9, characterized in that: The door lock device (7) further comprises a door closing and unlocking plate (73), an inclined plate (711) being arranged on the cabinet door synchronization plate (71), the door closing and unlocking plate (73) comprising a sliding lifting plate (731) and a pulley (732), the end of the sliding lifting plate (731) being slidably clamped on the door lock frame (70), the pulley (732) being abutted against the inclined plate (711), and when the cabinet door synchronization plate (71) is moved to open, the sliding lifting plate (731) blocks the grounding switch port (2013).

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