Step-by-step switch interlocking device and equipment cabinet

Abstract

The present invention relates to the technical field of power distribution system safety control, and provides a step-by-step operation type switch interlocking device, and also provides an equipment cabinet, wherein the step-by-step operation type switch interlocking device includes: a cabinet, on which a system panel is provided, and the system panel is provided with a circuit breaker operation button and an isolation operation hole; a circuit breaker, an isolation switch and a grounding switch, and the circuit breaker operation button is used to open / close the circuit breaker; a first interlocking component, including an isolation operation shaft and a grounding operation shaft; a second interlocking component, including an interlocking drive plate and an isolation operation baffle. Compared with the existing technology, the present invention adopts a self-contained mechanical interlocking structure that operates in sequence and a maintenance-free cabinet door interlocking mechanism, so that the power supply and power off operations can only be completed by performing the steps allowed by the "safety regulations" one by one, eliminating manual dependence, reducing the occupied space, and realizing a miniaturized and compact structural design.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution system safety control, and in particular to a step-by-step operation switch interlocking device and an equipment cabinet. Background Art

[0002] The complete equipment commonly used in power distribution systems is also called switch interlocking device. Usually, when considering the situation of short-circuit fault disconnection in the power load distribution unit, circuit breakers are used to control the normal switching and abnormal load tripping of the local load. This type of circuit breaker equipment complete system device (cabinet) belongs to the intermediate large-capacity or terminal key load equipment in the construction of intelligent power grid.

[0003] To ensure safe operation and maintenance, power distribution system specifications typically require comprehensive interlocking systems between circuit breakers, disconnectors, earthing switches, and cabinet doors within these complete systems. While many commercially available products have interlocking requirements that comply with safety regulations, these often require manual intervention to ensure compliance. Furthermore, the interlocking requirements consume significant space, increasing the overall system size and hindering miniaturization during system integration. In particular, some cabinet door interlocking designs require users to perform extensive adjustments during installation and commissioning to ensure interlocking conditions are met. In many cases, these interlocking systems can fail due to changes in equipment handling, necessitating on-site intervention. These factors present significant operational challenges for users. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a step-by-step operation switch interlocking device, which adopts a built-in mechanical interlocking structure that operates in sequence and a maintenance-free cabinet door interlocking mechanism, so that power supply and power off operations can only be completed by following the steps allowed by the "safety regulations" one by one, eliminating manual dependence, reducing the occupied space, and realizing a miniaturized and compact structural design.

[0005] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0006] A step-by-step operation switch interlocking device is provided, comprising: a cabinet provided with a system panel, the system panel being provided with a circuit breaker operation button and an isolation operation hole; a circuit breaker, an isolation switch, and an earthing switch, all of which are provided on the cabinet, the circuit breaker operation button being electrically connected to the circuit breaker and being used to open / close the circuit breaker; a first interlocking assembly comprising an isolation operation shaft and an earthing operation shaft, the isolation operation shaft being provided in the isolation operation hole and being used to open / close the isolation switch, the earthing operation shaft being used to open / close the earthing switch, a locking structure being provided between the isolation operation shaft and the earthing operation shaft, such that the earthing operation shaft can be rotated only when the isolation operation shaft is in an open state; and a second interlocking assembly comprising an interlocking drive plate and an isolation operation baffle, the circuit breaker being connected to the interlocking drive plate, the isolation operation plate being connected to the interlocking drive plate and blocking the isolation operation hole, so that when the circuit breaker is open, the interlocking drive plate drives the isolation operation baffle to move out of the isolation operation hole.

[0007] Compared with the existing technology, the step-by-step operation switch interlocking device has at least the following beneficial effects: the invention adopts a built-in mechanical "blocking" structure design, so that the operator can complete the power supply and power off operation by following the steps allowed by the "safety regulations" one by one, eliminating the reliance on manual judgment during the operation process, and on the premise of ensuring the adjustment-free installation of the cabinet door interlock, the safety regulations provide that "the isolating switch and the grounding switch can only be closed at the same time, the isolating switch can be closed only after the grounding switch is opened, the grounding switch cannot be closed after the isolating switch is closed, the isolating switch and the grounding switch cannot be operated after the circuit breaker is closed, and the grounding switch cannot be operated after the circuit breaker is closed. The safety operation requirement of "the cabinet door can only be opened after the switch is closed" is directly implemented by using the built-in mechanical interlocking method. The entire operation process does not require human intervention to determine whether the next operation meets the safety regulations. This brings convenience to the subsequent operation and maintenance of the circuit breaker complete set of equipment, greatly reducing the "technical" risks that may be brought about by equipment transportation and operation management. It is also highly compatible with the remote operation of current intelligent distribution network equipment and supports electric operation of circuit breakers. At the same time, it is precisely because of the use of a built-in mechanical interlocking structure that the space occupied by these components is directly reduced, realizing a miniaturized and compact structural design.

[0008] Optionally, a grounding operation hole is further provided on the system panel, the grounding operation shaft is provided in the grounding operation hole, the second interlocking assembly further includes a grounding operation baffle for blocking the grounding operation hole, the grounding operation baffle is connected to the interlocking drive plate, and when the circuit breaker is opened, the interlocking drive plate also drives the grounding operation baffle to move out of the grounding operation hole.

[0009] Optionally, the second interlocking assembly further includes an interlocking transmission plate, and the interlocking drive plate is connected to the isolation operation baffle and the grounding operation baffle via the interlocking transmission plate.

[0010] Optionally, the grounding operation baffle is slidably disposed on the cabinet, and a first elastic member is provided between the cabinet and the grounding operation baffle, and the first elastic member provides elastic potential energy to reset the grounding operation baffle to block the grounding operation hole.

[0011] Optionally, a grounding operation hole is further provided on the system panel, and the grounding operation shaft is provided in the grounding operation hole. The switch interlocking device also includes a locking indication component, and the locking indication component includes an indicating movable part provided on the system panel, and the indicating movable part is locked on the second interlocking component. The second interlocking component also includes a grounding operation baffle for blocking the grounding operation hole, and the grounding operation baffle is connected to the indicating movable part. When the circuit breaker is opened, the indicating movable part disengages from the second interlocking component, and the indicating movable part disengages from the second interlocking component. At this time, the indicating movable part can be moved to an unlocked position and drive the grounding operation baffle to release the grounding operation hole.

[0012] Optionally, the locking structure includes an interlocking arm rotatably arranged on the cabinet, the interlocking arm having a locking end, the isolation operating shaft having a first locking groove, and the grounding operating shaft having a second locking groove. When the grounding operating shaft is in an open state, the locking end is buckled into the second locking groove, and the isolation operating shaft can rotate in the isolation operating hole; when the isolation operating shaft is in an open state, the grounding operating shaft can push the locking end to buckle into the first locking groove and can rotate in the grounding operating hole.

[0013] Optionally, a second elastic member is provided between the interlocking arm and the cabinet, and the second elastic member causes the locking end to abut against the grounding operating shaft.

[0014] Optionally, the locking end has an interlocking wheel that abuts against the grounding operating shaft.

[0015] Optionally, an isolation movable groove is provided in the circumferential direction of the isolation operating shaft, and the cabinet has an isolation fixing piece arranged in the isolation movable groove. When the isolation fixing piece is located at both ends of the isolation movable groove, the isolation operating shaft is respectively in the open and closed states.

[0016] Optionally, a grounding movable groove is provided in the circumferential direction of the grounding operating shaft, and the cabinet has a grounding fixing piece arranged in the grounding movable groove. When the grounding fixing piece is located at both ends of the grounding movable groove, the grounding operating shaft is respectively in the open and closed states.

[0017] Optionally, the cabinet includes a cabinet body and a cabinet door covered on the cabinet body, and the second interlocking assembly also includes an interlocking plate connected to the grounding switch or the grounding operating shaft, the interlocking plate is connected between the cabinet door and the cabinet body and locks the cabinet door to the cabinet body, and when the grounding operating shaft is in the open state, the interlocking plate is moved to disengage the cabinet door from the cabinet body.

[0018] Optionally, an electromagnetic lock is further included for detecting whether the charged body in the switch interlocking device is charged, and when the charged body is charged, the electromagnetic lock locks the grounding operating shaft.

[0019] To achieve the above object, the present invention further provides an equipment cabinet, comprising a body and the above-mentioned step-by-step operation switch interlocking device, wherein the switch interlocking device is arranged in the body.

[0020] Compared with the existing technology, this equipment cabinet has at least the following beneficial effects: it adopts a built-in mechanical interlocking structure that operates in sequence and a maintenance-free cabinet door interlocking mechanism, which effectively reduces the high "technical" requirements of the equipment cabinet for the user's operation and maintenance personnel; at the same time, because of the integrated overall structural design of the switch interlocking device, it brings convenience to the later operation and maintenance of the equipment cabinet, greatly reduces the technical risks that may be brought about by equipment handling and operation management, reduces the space occupied by circuit breakers, disconnectors and earthing switches on the equipment cabinet, and improves the space utilization of the equipment cabinet.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A front view of a step-by-step switch interlocking device according to an embodiment of the first aspect of the present invention;

[0024] Figure 2 for Figure 1 Axonometric drawing of the step-by-step switch interlocking device provided in;

[0025] Figure 3 for Figure 2 A partial enlarged schematic diagram of point E in the middle;

[0026] Figure 4 for Figure 1A schematic diagram of the internal structure of the step-by-step operation switch interlocking device from a first perspective is provided;

[0027] Figure 5 for Figure 1 A schematic diagram of the internal structure of the step-by-step operation switch interlocking device from a second perspective is provided;

[0028] Figure 6 A schematic structural diagram of the locking structure provided by the embodiment of the first aspect of the present invention when locking the grounding operating shaft;

[0029] Figure 7 A schematic structural diagram of the locking structure provided by the embodiment of the first aspect of the present invention when unlocking the grounding operating shaft;

[0030] Figure 8 This is a structural diagram of an equipment cabinet provided in an embodiment of the second aspect of the present invention.

[0031] Description of Figure Numbers:

[0032] Cabinet 100, cabinet body 110, external buckle hole 111, cabinet door 120, internal buckle hole 121, system panel 130, circuit breaker operation button 131, isolation operation hole 132, grounding operation hole 133, isolation fixing piece 140, grounding fixing piece 150;

[0033] First interlocking assembly 200, isolation operating shaft 210, first locking groove 211, isolation movable groove 212, grounding operating shaft 220, second locking groove 221, grounding movable groove 222, interlocking piece 230;

[0034] The second interlocking assembly 300, the interlocking driving plate 310, the interlocking transmission plate 320, the isolation operation baffle 330, the grounding operation baffle 340, and the first elastic member 350;

[0035] Locking structure 400, interlocking arm 410, locking end 411, interlocking wheel 4111, second elastic member 420;

[0036] Locking indication assembly 500, indicating movable member 510;

[0037] Electromagnetic lock 600, mechanical component 610;

[0038] Body 700. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0042] The step-by-step operation switch interlocking device provided by the embodiment of the first aspect of the present invention will now be described with reference to the accompanying drawings.

[0043] See also Figures 1 to 7 A step-by-step operation switch interlocking device includes a cabinet 100, a circuit breaker, an isolating switch, a grounding switch, a first interlocking assembly 200 and a second interlocking assembly 300. The cabinet 100 is provided with a system panel 130, and the system panel 130 is provided with a circuit breaker operation button 131 and an isolating operation hole 132. The circuit breaker operation button 131 is electrically connected to the circuit breaker and is used to open or close the circuit breaker.

[0044] The circuit breaker, disconnector, and grounding switch are all mounted on the cabinet 100. The first interlock assembly 200 includes an isolation operating shaft 210 and a grounding operating shaft 220. The isolation operating shaft 210 is disposed within the isolation operating hole 132 and is connected to the disconnector for opening or closing the disconnector. The grounding operating shaft 220 is connected to the grounding switch for opening or closing the grounding switch. A locking structure 400 is disposed between the isolation operating shaft 210 and the grounding operating shaft 220. The locking structure 400 is configured to limit the operational restriction relationship between the isolation operating shaft 210 and the grounding operating shaft 220. The grounding operating shaft 220 can only be rotated when the isolation operating shaft 210 is in the open state. It should be noted that the isolation operating shaft 210 and the grounding operating shaft 220 can respectively open or close the disconnector and the grounding switch through mechanical transmission, or can respectively open or close the disconnector and the grounding switch through electrical connection.

[0045] See Figure 4 and Figure 5The second interlock assembly 300 includes an interlock drive plate 310 and an isolation operation baffle 330. The circuit breaker is connected to the interlock drive plate 310. The isolation operation baffle 330 is connected to the interlock drive plate 310 and can block the inside of the isolation operation hole 132, preventing the operator from operating the isolation operation shaft 210 in the isolation operation hole 132 through the isolation operation hole 132. When the circuit breaker is opened, the interlock drive plate 310 drives the isolation operation baffle 330 to move, causing the isolation operation baffle 330 to move out of the isolation operation hole 132, and the isolation operation shaft 210 is exposed again in the isolation operation hole 132 for operation. On the contrary, when the circuit breaker is closed, the interlock drive plate 310 drives the isolation operation baffle 330 to perform a reset movement, and the isolation operation baffle 330 covers the isolation operation hole 132 again, locking the isolation operation baffle 330, so that the isolation switch cannot be operated when the circuit breaker is closed. At the same time, when the circuit breaker is closed and the isolation switch is also in the closed state, the locking structure 400 locks the grounding operating shaft 220, and the grounding switch cannot be operated, so that the grounding switch remains in the open state, realizing a mode in which the isolation switch and the grounding switch can only be operated together.

[0046] Compared with the existing technology, the switch interlocking device adopts a built-in mechanical "blocking" structure design, requiring the operator to follow the steps allowed by the "safety regulations" one by one to complete the power supply and power off operations, eliminating reliance on manual judgment during the operation. At the same time, under the premise of ensuring the adjustment-free installation of the cabinet door 120 interlock, the safety operation requirements given by the safety regulations: "the disconnector and the earthing switch can only be closed one at a time, the disconnector can only be closed after the earthing switch is opened, the earthing switch cannot be closed after the disconnector is closed, the disconnector and the earthing switch cannot be operated after the circuit breaker is closed, and the cabinet door 120 can only be opened after the earthing switch is closed" are directly implemented by the built-in mechanical interlocking method. The entire operation process does not require human intervention to determine whether the next operation meets the safety regulations. This brings convenience to the subsequent operation and maintenance of the circuit breaker complete set, greatly reducing the "technical" risks that may be caused by equipment transportation and operation management. It is also highly compatible with the remote operation of current intelligent distribution network equipment and supports electric operation of the circuit breaker. At the same time, it is precisely because of the use of a built-in mechanical interlocking structure that the space occupied by these components is directly reduced, achieving a miniaturized and compact structural design.

[0047] In order to ensure that the disconnector and the grounding switch cannot be operated after the circuit breaker is closed, two specific embodiments are preferred below.

[0048] Example 1

[0049] The system panel 130 is also provided with a grounding operation hole 133, and the grounding operation shaft 220 is arranged in the grounding operation hole 133. The second interlock assembly 300 also includes a grounding operation baffle 340, which is connected to the interlock drive plate 310 and is used to block the grounding operation hole 133. When the circuit breaker is opened, the interlock drive plate 310 drives the isolation operation baffle 330 to move out of the isolation operation hole 132, and also drives the grounding operation baffle 340 to move out of the grounding operation hole 133, so that the grounding operation shaft 220 is exposed in the grounding operation hole 133, so that the operator can operate the grounding switch.

[0050] Furthermore, the second interlock assembly 300 further includes an interlock transmission plate 320. The interlock drive plate 310 is connected to the isolation operation baffle 330 and the grounding operation baffle 340 via the interlock transmission plate 320, so that when the interlock drive plate 310 moves, it can simultaneously drive the movement of the isolation operation baffle 330 and the grounding operation baffle 340. Specifically, the interlock transmission plate 320 is slidably connected to the cabinet 100. The end of the interlock drive plate 310 is hingedly connected to the interlock transmission plate 320, which can push the interlock transmission plate 320 to move along a fixed track. The isolation operation baffle 330 is rotatably connected to the cabinet 100, and the grounding operation baffle 340 is slidably connected to the cabinet 100. The isolation operation baffle 330 and the grounding operation baffle 340 are both hingedly connected to the interlock transmission plate 320 to form an interconnected linkage structure. Under the action of the interlock drive plate 310, the isolation operation hole 132 and the grounding operation hole 133 are opened or closed simultaneously.

[0051] In another structure, the grounding operation baffle 340 is slidably set on the cabinet 100, and a first elastic member 350 is provided between the cabinet 100 and the grounding operation baffle 340. The first elastic member 350 makes the grounding operation baffle 340 rest against the interlocking transmission plate 320. During the circuit breaker opening process, the interlocking transmission plate 320 pushes the grounding operation baffle 340 to overcome the movement of the first elastic member 350, so that the grounding operation baffle 340 leaves the grounding operation hole 133. When the circuit breaker is closed, the first elastic member 350 pushes the grounding operation baffle 340 to re-seal the grounding operation hole 133.

[0052] In addition to the above structures, other structures that can enable the interlocking transmission plate 320 to drive the isolation operation baffle 330 and the grounding operation baffle 340 to move simultaneously are also within the scope of implementation of this embodiment.

[0053] Example 2

[0054] The system panel 130 is further provided with a grounding operation hole 133 , in which the grounding operation shaft 220 is disposed. The second interlocking assembly 300 further includes a grounding operation baffle 340 , which is used to block the grounding operation hole 133 . The switch interlocking device also includes a locking indication assembly 500, which is used to control the grounding operation baffle 340 to open or block the grounding operation hole 133. It includes an indicating movable part 510 arranged on the system panel 130. The indicating movable part 510 is connected to the grounding operation baffle 340 and can move on the system panel 130 to drive the grounding operation baffle 340 to move. In addition, the indicating movable part 510 is locked on the second interlock assembly 300. The isolation operation baffle 330 on the second interlock assembly 300 is connected to the interlock drive plate 310 through the interlock transmission plate 320. The indicating movable part 510 can be locked on the interlock transmission plate 320, the interlock drive plate 310 or the isolation operation baffle 330. When the circuit breaker is in the closed state, the indicating movable part 510 is blocked in its unlocking direction by the corresponding components on the second interlock assembly 300, so that the grounding operation baffle 340 cannot leave the grounding operation hole 133, and the grounding operation hole 133 is in a locked state. When the circuit breaker is opened, the interlock transmission plate 320, the interlock drive plate 310 and the isolation operation baffle 330 on the second interlock assembly 300 move in the unlocking direction of the isolation switch, making room for the indicating movable member 510 to move. At this time, the indicating movable member 510 can move to the unlocked position and drive the grounding operation baffle 340 to make room for the grounding operation hole 133. At this time, the grounding operation shaft 220 in the grounding operation hole 133 is in an operable state.

[0055] With the above structure, the circuit breaker first unlocks the disconnector through the second interlock assembly 300, and then unlocks the grounding switch through the lock indication assembly 500, ensuring that the operation process of circuit breaker-disconnector-grounding switch complies with the operation sequence specified by safety regulations to achieve closing and opening.

[0056] In addition, in addition to the above two preferred embodiments, the interlocking control between the circuit breaker and the grounding switch and the disconnector may be implemented in other ways, which are also within the protection scope of the present invention.

[0057] In another embodiment of the present invention, the locking structure 400 includes an interlocking arm 410 rotatably set on the cabinet 100, the interlocking arm 410 has a locking end 411, the isolation operating shaft 210 has a first locking groove 211, and the grounding operating shaft 220 has a second locking groove 221. The first locking groove 211 is set on the outer wall of the isolation operating shaft 210, and the second locking groove 221 is also set on the outer wall of the grounding operating shaft 220. The locking end 411 is located between the isolation operating shaft 210 and the grounding operating shaft 220, and can be abutted against the outer wall of the isolation operating shaft 210 and the outer wall of the grounding operating shaft 220. When the grounding operating shaft 220 is in the open state, the locking end 411 is buckled into the second locking groove 221, and the isolating operating shaft 210 can rotate in the isolating operating hole 132, and the grounding operating shaft 220 is locked by the locking end 411. When the isolating operating shaft 210 moves to the open position, the first locking groove 211 is close to the position of the locking end 411. At this time, the grounding operating shaft 220 can rotate in the grounding operating hole 133, so that the locking end 411 exits the second locking groove 221 and pushes the locking end 411 to buckle into the first locking groove 211, and the isolating operating shaft 210 is locked. Through the above structure, the grounding switch can be operated only when the isolating switch is in the open state, and the isolating switch can be operated only when the grounding switch is in the open state, achieving the technical effect that only one of the isolating switch and the grounding switch can be combined.

[0058] Specifically, a second elastic member 420 is provided between the interlocking arm 410 and the cabinet 100. The second elastic member 420 forces the locking end 411 to abut against the grounding operating shaft 220. When the grounding operating shaft 220 rotates, the locking end 411 abuts against the outer wall of the grounding operating shaft 220 and rotates along the outer wall until it reaches the position of the second locking slot 221. At this point, the locking end 411, under the action of the second elastic member 420, automatically snaps into the second locking slot 221, thereby locking the grounding operating shaft 220. The locking end 411 can only be pushed out of the second locking slot 221 when the grounding operating shaft 220 rotates if and only if the first locking slot 211 on the isolation operating shaft 210 is located next to the locking end 411. It should be noted that the locking end 411 can only be accommodated in the first locking groove 211 and / or the second locking groove 221 between the isolation operating shaft 210 and the grounding operating shaft 220, thereby realizing the respective locking functions of the isolation operating shaft 210 and the grounding operating shaft 220.

[0059] More specifically, the locking end 411 has an interlocking wheel 4111, which rests against the grounding operating shaft 220 and can rotate along the outer side of the grounding operating shaft 220 to reduce the friction resistance of the grounding operating shaft 220 and also reduce the friction resistance on the isolation operating shaft 210.

[0060] In another embodiment of the present invention, an isolation movable groove 212 is provided in the circumferential direction of the isolation operating shaft 210, and the cabinet 100 has an isolation fixing member 140 disposed in the isolation movable groove 212. The isolation movable groove 212 limits the rotation range of the isolation operating shaft 210. When the isolation fixing member 140 is located at both ends of the isolation movable groove 212, the isolation operating shaft 210 is respectively in the open and closed states. Figure 6 and Figure 7 As shown, points A and B are the opening and closing end points of the isolation operating shaft 210. When the isolation operating shaft 210 rotates to point A, the locking end 411 of the interlocking arm 410 can be buckled into the first locking groove 211 of the isolation operating shaft 210.

[0061] In contrast, a grounding movable groove 222 is provided in the circumferential direction of the grounding operating shaft 220, and a grounding fixing member 150 is provided on the cabinet 100 and is disposed in the grounding movable groove 222. The grounding movable groove 222 limits the rotation range of the grounding operating shaft 220. When the grounding fixing member 150 is located at both ends of the grounding movable groove 222, the grounding operating shaft 220 is in the open and closed states respectively. Figure 6 and Figure 7 As shown, points C and D are the opening and closing end points of the grounding operating shaft 220. When the grounding operating shaft 220 rotates to point C, the locking end 411 on the interlocking arm 410 can be buckled into the second locking groove 221 of the grounding operating shaft 220.

[0062] In another embodiment of the present invention, the cabinet 100 includes a cabinet body 110 and a cabinet door 120 covering the cabinet body 110. The first interlock assembly 200 further includes an interlocking plate 230. The interlocking plate 230 is connected to the isolating switch or the isolating operating shaft 210. The interlocking plate 230 is connected between the cabinet door 120 and the cabinet body 110, so that the cabinet door 120 is locked to the cabinet body 110 and the cabinet door 120 cannot be opened from the cabinet body 110. When the isolating operating shaft 210 rotates, the interlocking plate 230 is driven to move directly or indirectly through the isolating switch until the isolating operating shaft 210 rotates to the open state. The interlocking plate 230 is then withdrawn from the cabinet door 120 and the cabinet door 120 is released from the cabinet body 110, thereby allowing an operator to open the cabinet door 120 from the outside of the cabinet body 110.

[0063] Specifically, an interlocking inner plate is provided on the inner side of the cabinet door 120 near the side wall of the cabinet door 120, and an inner buckle hole 121 is provided on the interlocking inner plate. An outer buckle hole 111 is provided on the side of the cabinet body 110 near the interlocking inner plate. When the cabinet door 120 is closed on the cabinet body 110, the inner buckle hole 121 coincides with the outer buckle hole 111, and the interlocking piece 230 can be respectively passed through the inner buckle hole 121 and the outer buckle hole 111 to lock the cabinet door 120 on the cabinet body 110. During operation, the isolation operating shaft 210 rotates to close the isolation switch, and the interlocking piece 230 passes through the inner buckle hole 121 and the outer buckle hole 111 to lock the cabinet door 120 on the cabinet body 110. When the isolation operating shaft 210 drives the isolation switch to open again, the interlocking piece 230 exits the inner buckle hole 121 and the outer buckle hole 111, so that the cabinet door 120 is in an openable state.

[0064] In a further improvement of the structure of the interlocking piece 230 in Example 2, the interlocking piece 230 is connected to the grounding operation baffle 340, and an elastic reset member is provided between the cabinet body 110 and the interlocking piece 230. The elastic reset member is used to push the interlocking piece 230 to move after the cabinet door 120 is opened and to reset the grounding operation baffle 340 to a position that blocks the grounding operation hole 133, so that the grounding operation hole 133 is automatically locked after the cabinet door 120 is opened, and the grounding switch cannot be operated. Specifically, the reset elastic member is connected to the interlocking piece 230 and rests between the cabinet door 120 and the cabinet body 110. When the cabinet door 120 is opened, the cabinet door 120 cancels the pushing force on the reset elastic member. The reset elastic member pushes the interlocking piece 230 away from the external buckle hole 111 under the action of its own elastic force. The interlocking piece 230 drives the grounding operation baffle 340 to re-block the grounding operation hole 133, so that after the cabinet door 120 is opened, the grounding operation shaft 220 cannot be operated through the grounding operation hole 133 to close or open the grounding switch.

[0065] In Example 1, the interlocking piece 230 can also be used to block the grounding operation hole 133 via a separate reset baffle, replacing the grounding operation baffle 340 in Example 2. The interlocking piece 230 is connected to the reset rib and can push the reset baffle to move. When the cabinet door 120 is opened, the reset elastic member, under its own elastic force, pushes the interlocking piece 230 away from the external buckle hole 111. The interlocking piece 230 drives the reset baffle to re-block the grounding operation hole 133, thereby closing the grounding operation hole 133.

[0066] Of course, other structures can also be used to achieve re-sealing of the grounding operation hole 133 after the cabinet door 120 is opened. When other structures achieve the same technical effects, they also fall within the scope of protection of the present invention.

[0067] In another embodiment of the present invention, the switch interlocking device further includes an electromagnetic lock 600, which is used to detect whether the driving element in the equipment cabinet is charged. The electromagnetic lock 600 also includes a mechanical component 610, which is used to lock the grounding operating shaft 220, preventing it from rotating. When the electromagnetic lock 600 detects that the charged element in the equipment cabinet is charged, it actively pushes out the mechanical component 610, locking it to the grounding operating shaft 220, and the grounding switch is now in an "inoperable" state. When the electromagnetic lock 600 detects that the charged element in the equipment cabinet is not charged, it retracts the mechanical component 610, unlocking the grounding switch and activating the "operable" permission.

[0068] In summary, taking Example 1 as an example, the operation process of the step-by-step operation switch interlocking device is as follows: when the electromagnetic lock 600 detects that the charged body of the equipment cabinet is energized, the electromagnetic lock 600 locks the grounding switch. At this time, even after the circuit breaker and the isolating switch are disconnected, the grounding switch cannot be operated, and the cabinet door 120 is in an unopenable state. The equipment cabinet needs to be powered off before it can be continued; when the electromagnetic lock 600 detects that the charged body of the equipment cabinet is not energized, the mechanical part 610 of the electromagnetic lock 600 is separated from the grounding operating shaft 220, and the grounding operating shaft 220 is in an operable state. Pressing the circuit breaker operating button 131 opens the circuit breaker, and the circuit breaker is opened and the interlock drive plate 3 is simultaneously opened. 10 drives the isolation operation baffle 330 and the grounding operation baffle 340 to move, opening the isolation operation hole 132 and the grounding operation hole 133. At this time, the isolation operation shaft 210 in the isolation operation hole 132 can be operated, and the isolation operation shaft 210 is rotated to put the isolation switch in the open state. The locking structure 400 unlocks the grounding operation shaft 220, and the interlocking piece 230 withdraws from between the cabinet body 110 and the cabinet door 120. The cabinet door 120 is in an openable state. Then the grounding operation shaft 220 is rotated to close the grounding switch. Finally, the cabinet door 120 is opened, and the cabinet door 120 transmission system on the cabinet door 120 blocks the grounding operation hole 133 again. At this time, the operator can perform maintenance on the interior of the cabinet 100.

[0069] It should be noted that the cabinet door 120 transmission system refers to the interlocking piece 230, the reset elastic member or other structures capable of achieving automatic blocking mentioned in the above embodiments.

[0070] The following describes an equipment cabinet according to an embodiment of the second aspect of the present invention.

[0071] See Figure 8 , an equipment cabinet, including a body 700 and a switch interlocking device according to the first embodiment of the present invention, a charged body is provided inside the body 700, the switch interlocking device is arranged inside the body 700 and electrically connected to the charged body, and is used to control the power on and off of the internal circuit of the body 700.

[0072] Compared with the existing technology, this equipment cabinet adopts its own mechanical interlocking structure that operates in sequence and a maintenance-free cabinet door interlocking mechanism, which effectively reduces the high "technical" requirements of the equipment cabinet for the user's operation and maintenance personnel; at the same time, because of the integrated overall structural design of the switch interlocking device, it brings convenience to the later operation and maintenance of the equipment cabinet, greatly reduces the technical risks that may be brought about by equipment handling and operation management, reduces the space occupied by circuit breakers, disconnectors and earthing switches on the equipment cabinet, and improves the space utilization of the equipment cabinet.

[0073] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A step-by-step operation switch interlocking device, characterized in that: include: A cabinet, on which a system panel is provided, wherein the system panel is provided with a circuit breaker operation button and an isolation operation hole; A circuit breaker, an isolating switch and an earthing switch are all provided on the cabinet, and the circuit breaker operation button is electrically connected to the circuit breaker and is used to open / close the circuit breaker; a first interlock assembly, comprising an isolation operating shaft and a grounding operating shaft, wherein the isolation operating shaft is disposed in the isolation operating hole and is used to open / close the isolation switch, and the grounding operating shaft is used to open / close the grounding switch, and a locking structure is provided between the isolation operating shaft and the grounding operating shaft, such that the grounding operating shaft can be rotated only when the isolation operating shaft is in an open state; a second interlock assembly, comprising an interlock drive plate and an isolation operation baffle, the circuit breaker being connected to the interlock drive plate, the isolation operation plate being connected to the interlock drive plate and blocking the isolation operation hole, and the interlock drive plate driving the isolation operation baffle to clear the isolation operation hole when the circuit breaker is opened; The system panel is further provided with a grounding operation hole, the grounding operation shaft is provided in the grounding operation hole, the switch interlocking device further includes a locking indication assembly, the locking indication assembly includes an indication movable member provided on the system panel, the indication movable member is locked on the second interlock assembly, the second interlock assembly further includes a grounding operation baffle for blocking the grounding operation hole, the grounding operation baffle is connected to the indication movable member, when the circuit breaker is opened, the indication movable member is disengaged from the second interlock assembly, the indication movable member is disengaged from the second interlock assembly, at which time the indication movable member can move to an unlocked position and drive the grounding operation baffle to clear the grounding operation hole; The system panel is also provided with a grounding operation hole, and the grounding operation shaft is arranged in the grounding operation hole. The second interlocking assembly also includes a grounding operation baffle for blocking the grounding operation hole. The grounding operation baffle is connected to the interlocking drive plate. When the circuit breaker is opened, the interlocking drive plate also drives the grounding operation baffle to move out of the grounding operation hole.

2. The step-by-step operation switch interlocking device according to claim 1, characterized in that: The second interlocking assembly further includes an interlocking transmission plate, and the interlocking drive plate is connected to the isolation operation baffle and the grounding operation baffle through the interlocking transmission plate.

3. The step-by-step operation switch interlocking device according to claim 2, characterized in that: The grounding operation baffle is slidably arranged on the cabinet, and a first elastic member is provided between the cabinet and the grounding operation baffle. The first elastic member provides elastic potential energy to reset the grounding operation baffle to block the grounding operation hole.

4. The step-by-step operation switch interlocking device according to claim 1, characterized in that: The locking structure includes an interlocking arm rotatably arranged on the cabinet, the interlocking arm having a locking end, the isolation operating shaft having a first locking groove, and the grounding operating shaft having a second locking groove. When the grounding operating shaft is in an open state, the locking end is buckled into the second locking groove, and the isolation operating shaft can rotate in the isolation operating hole; when the isolation operating shaft is in an open state, the grounding operating shaft can push the locking end to buckle into the first locking groove and can rotate in the grounding operating hole.

5. The step-by-step operation switch interlocking device according to claim 4, characterized in that: A second elastic member is provided between the interlocking arm and the cabinet, and the second elastic member causes the locking end to abut against the grounding operating shaft.

6. The step-by-step operation switch interlocking device according to claim 5, characterized in that: The locking end is provided with an interlocking wheel which abuts against the grounding operation shaft.

7. The step-by-step operation switch interlocking device according to claim 1, characterized in that: An isolation movable groove is provided in the circumferential direction of the isolation operating shaft, and the cabinet has an isolation fixing piece arranged in the isolation movable groove. When the isolation fixing piece is located at both ends of the isolation movable groove, the isolation operating shaft is respectively in the open and closed states.

8. The step-by-step operation switch interlocking device according to claim 1, characterized in that: A grounding movable groove is provided in the circumferential direction of the grounding operating shaft, and the cabinet is provided with a grounding fixing member arranged in the grounding movable groove. When the grounding fixing member is located at both ends of the grounding movable groove, the grounding operating shaft is respectively in the open and closed states.

9. The step-by-step operation switch interlocking device according to any one of claims 1 to 8, characterized in that: The cabinet includes a cabinet body and a cabinet door covered on the cabinet body. The second interlocking assembly also includes an interlocking plate connected to the isolating switch or the isolating operating shaft. The interlocking plate is connected between the cabinet door and the cabinet body and locks the cabinet door to the cabinet body. When the isolating operating shaft is in the open state, the interlocking plate is moved to disengage the cabinet door from the cabinet body.

10. The step-by-step operation switch interlocking device according to any one of claims 1 to 9, characterized in that: It also includes an electromagnetic lock for detecting whether the charged object in the equipment cabinet is charged. When the charged object is charged, the electromagnetic lock locks the grounding operating shaft.

11. An equipment cabinet, characterized in that: The invention comprises a machine body and the step-by-step operation switch interlocking device according to any one of claims 1 to 10, wherein the switch interlocking device is arranged in the machine body.

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