Interlocking device

Abstract

An interlocking device comprises a first lock body located on a switch device, the first lock body comprises a locking state and an unlocking state which can be switched, when the switch device is in an opening state, the first lock body is only in the unlocking state, and only when the switch device is in a closing state, the locking state and the unlocking state of the first lock body can be switched mutually; the second lock body is located on a box door of the power distribution equipment, the second lock body comprises a locking state and an unlocking state which can be switched, when the second lock body is in the locking state, the box door is closed, and when the second lock body is in the unlocking state, the box door is opened; the universal key can be inserted into the first lock body to drive the first lock body to switch the state and can also be inserted into the second lock body to drive the second lock body to switch the state, the universal key can be separated from the first lock body only when the first lock body is in the locking state, and the universal key can be separated from the second lock body only when the second lock body is in the locking state. According to the utility model, the life safety of operators can be guaranteed.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the field of semiconductor equipment, especially to an interlocking device. BACKGROUND

[0002] The full name of the cubicle is armored movable middle metal-enclosed switchgear, which is divided into three layers, the upper layer is a busbar and an instrument room isolated from each other, the middle layer is a circuit breaker room, and the lower layer is a cable room or a transformer room, since the circuit breaker is in the middle, it is called armored movable middle metal-enclosed switchgear, which is simply called a cubicle, and is generally used to protect the rear-end transformer or other high-voltage loads. CONTENT OF THE UTILITY MODEL

[0003] The embodiment of the utility model solves the problem of providing an interlocking device for switchgear and power distribution equipment controlled by the switchgear, which is beneficial to protect the life safety of operating personnel.

[0004] To solve the above problems, the embodiment of the utility model provides an interlocking device for switchgear and power distribution equipment controlled by the switchgear, the switchgear includes an open state and a closed state, and the interlocking device includes: a first lock body located on the switchgear, the first lock body includes a lockable locking state and an unlockable state, when the switchgear is in the open state, the first lock body is only in the unlockable state, and only when the switchgear is in the closed state, the locking state and the unlockable state of the first lock body can be switched with each other; a second lock body located on the box door of the power distribution equipment, the second lock body includes a lockable locking state and an unlockable state, when the second lock body is in the locking state, the box door is closed, and when the second lock body is in the unlockable state, the box door is opened; a universal key which can be inserted into the first lock body to drive the first lock body to switch states, and can also be inserted into the second lock body to drive the second lock body to switch states, and only when the first lock body is in the locking state, the universal key can be separated from the first lock body, and only when the second lock body is in the locking state, the universal key can be separated from the second lock body.

[0005] Optionally, the lock tongue of the first lock body is telescopic outward from the lock hole, when the switchgear is in the open state, the lock hole position of the first lock body has a blocking piece, and when the switchgear is in the closed state, the lock hole position of the first lock body has a telescopic space.

[0006] Optionally, a plate is arranged on the side of the switchgear, the switchgear can move along the surface of the plate, when the switchgear moves to the first position, the switchgear is in the open state, when the switchgear moves to the second position, the switchgear is in the closed state, and only at the second position, a hole is arranged on the plate; the lock hole of the first lock body faces the plate, when the switchgear moves to the first position, the lock hole position is blocked by the plate, and when the switchgear moves to the second position, the hole serves as the telescopic space.

[0007] Optionally, when the first lock body is in the locked state, the size of the lock tongue of the first lock body extending out of the lock opening is the locking size, and the distance between the lock opening of the first lock body and the plate member is less than the locking size.

[0008] Optionally, the size of the hole is greater than the maximum size of the surface of the lock tongue of the first lock body facing the plate member.

[0009] Optionally, when the switch device moves to the second position, the lock opening is arranged in alignment with the hole.

[0010] Optionally, the switch device is a circuit breaker, the circuit breaker is arranged in a cubicle, and the plate member is a plate on either side of the cubicle.

[0011] Optionally, the power distribution device is a transformer, when the switch device is in the open state, the transformer is in a working state, and when the switch device is in the closed state, the transformer is in a maintenance state.

[0012] Optionally, the box door of the power distribution device includes a first box door located at the primary side of the transformer and a second box door located at the secondary side of the transformer, and the second lock body is arranged on the first box door and the second box door.

[0013] Optionally, the box door of the power distribution device includes a first box door located at the primary side of the transformer and a second box door located at the secondary side of the transformer, the second lock body on the first box door is a second one-door lock body, the second lock body on the second box door is a second two-door lock body, the lock cylinder of the second one-door lock body is different from that of the second two-door lock body, the first lock body includes a first sub-lock body corresponding to the second one-door lock body and a second sub-lock body corresponding to the second two-door lock body, and the common key includes a first common key that can be inserted into the second one-door lock body and the first sub-lock body and a second common key that can be inserted into the second two-door lock body and the second sub-lock body.

[0014] Compared with the prior art, the technical scheme of the embodiment of the utility model has the following advantages:

[0015] The utility model discloses an interlocking device of switchgear and power distribution equipment, and the switchgear and the power distribution equipment are connected through the interlocking device, and the switchgear is in the open state when the power distribution equipment is in the power supply state, and the switchgear is in the closed state when the power distribution equipment is in the power-off state, and the utility model discloses an interlocking device, when the switchgear is in the open state, the first lock body is only in the unlocking state, and only when the first lock body is in the locking state, the general key can be separated from the first lock body, that is, when the switchgear is in the open state, the first lock body and the general key are inseparable, and the general key can not be pulled down from the first lock body, and at this moment, the second lock body can only be in the locking state and can not be switched to the unlocking state through the general key, so when the power distribution equipment is in the power supply state, the situation that the box door of the power distribution equipment is opened by mistake is avoided, and the situation that the operating personnel and the power distribution equipment in the power supply state are contacted by mistake is avoided, thereby guaranteeing the life safety of the operating personnel, and simultaneously, only when the switchgear is in the closed state, the locking state and the unlocking state of the first lock body can be switched to each other, that is, only when the power distribution equipment is in the power-off state, the general key can drive the first lock body to the locking state and lock the power-off state of the power distribution equipment, and at this moment, the general key can be pulled down from the first lock body, and the general key can drive the second lock body to the unlocking state in correspondence, and the box door is opened, and at this moment, the power distribution equipment is in the power-off state, thereby guaranteeing the safety of the personnel who need to contact the power distribution equipment for overhauling and other needs, and the situation that the box door is opened by mistake when the power distribution equipment is in the power supply state and harms the safety of the personnel is avoided, and in addition, when the box door is opened, the second lock body is in the unlocking state, and only when the second lock body is in the locking state, the general key can be separated from the second lock body, so at this moment, the general key can not be pulled down from the second lock body, and the locking state of the first lock body can not be switched to the unlocking state, so that the switchgear is always in the closed state, and the power distribution equipment is always in the power-off state, thereby avoiding the situation that the power distribution equipment is mistakenly powered when the box door is opened, guaranteeing the life safety of the operating personnel of the power distribution equipment, and it can be known from the above that the utility model embodiment adopts the interlocking device of the multiple lock bodies and the key, and the situation that the operating personnel mistakenly operates the switchgear and leads to the situation that the power distribution equipment is mistakenly powered is avoided, thereby guaranteeing the life safety of the operating personnel. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of switchgear in the utility model embodiment;

[0017] Figure 2 It is the structure schematic diagram of the first lock body and the general key of the interlocking device on the switchgear in the locking state of the first lock body in the utility model embodiment;

[0018] Figure 3 It is the structure schematic diagram of the first lock body and the general key of the interlocking device on the switchgear in the unlocking state of the first lock body in the utility model embodiment;

[0019] Figure 4is a structural schematic view of the power distribution equipment in the embodiment of the utility model;

[0020] Figure 5 is a structural schematic view of the second lock body on one side of the interlocking device on the power distribution equipment in the embodiment of the utility model;

[0021] Figure 6 is a structural schematic view of the second lock body on the other side of the interlocking device on the power distribution equipment in the embodiment of the utility model. DETAILED DESCRIPTION

[0022] From the background art, it is known that at present, there is no interlocking device between the cubicle and the transformer box, so when the transformer is maintained and repaired, the maintenance personnel may not correctly shut down the cubicle corresponding to the transformer under repair due to carelessness or violation of the safety operation procedures, which leads to the maintenance personnel mistakenly opening the live transformer box, thereby endangering the safety of the maintenance personnel, and in the process of maintaining the transformer or after the maintenance is completed, the operating personnel may mistakenly supply power to the transformer under repair due to misoperation of the cubicle, which leads to the transformer under maintenance being live, thereby endangering the safety of the maintenance personnel, in addition, in the process of transformer operation, the operating personnel may mistakenly open the transformer box door for heat dissipation, which leads to touching the live transformer, thereby endangering the safety of the operating personnel.

[0023] In order to solve the above technical problems, the utility model embodiment provides an interlocking device for a switch device and a power distribution equipment controlled by the switch device, the switch device includes an open state and a shutdown state, the interlocking device includes: a first lock body located on the switch device, the first lock body includes a switchable locked state and an unlocked state, when the switch device is in the open state, the first lock body is only in the unlocked state, and only when the switch device is in the shutdown state, the locked state and the unlocked state of the first lock body can be switched with each other; a second lock body located on the door of the power distribution equipment, the second lock body includes a switchable locked state and an unlocked state, when the second lock body is in the locked state, the door is closed, when the second lock body is in the unlocked state, the door is opened; a universal key which can be inserted into the first lock body to drive the first lock body to switch the state, and can also be inserted into the second lock body to drive the second lock body to switch the state, and only when the first lock body is in the locked state, the universal key can be separated from the first lock body, and only when the second lock body is in the locked state, the universal key can be separated from the second lock body.

[0024] The utility model discloses an interlocking device of multiple lock bodies and one key, which is used for preventing the power distribution equipment from being mispowered by the switching device.

[0025] In order to make the above-mentioned purpose, features and advantages of the embodiments of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the drawings.

[0026] Reference Figures 1 to 6 The interlocking device comprises a first lock body 100 located on the switching device 600, the first lock body 100 comprising switchable locking state (as shown in Figure 2 and unlocking state (as shown in Figure 3The first lock body 100 is only in the unlocked state when the switch device 600 is in the on state, and the locking state and the unlocking state of the first lock body 100 can be switched with each other only when the switch device 600 is in the off state; the second lock body 200 is located on the box door 710 of the power distribution device 700, and the second lock body 200 comprises a switchable locking state and an unlocking state, the box door 710 is closed when the second lock body 200 is in the locking state, and the box door 710 is opened when the second lock body 200 is in the unlocking state; the universal key 300 can be inserted into the first lock body 100 to drive the first lock body 100 to switch the state, and can also be inserted into the second lock body 200 to drive the second lock body 200 to switch the state, and the universal key 300 can be separated from the first lock body 100 only when the first lock body 100 is in the locking state, and the universal key 300 can be separated from the second lock body only when the second lock body 200 is in the locking state.

[0027] wherein, Figure 1 is a structural schematic view of a switch device, Figure 2 is a structural schematic view of a first lock body and a universal key of an interlocking device on a switch device in a locking state of the first lock body, Figure 3 is a structural schematic view of a first lock body and a universal key of an interlocking device on a switch device in an unlocking state of the first lock body, Figure 4 is a structural schematic view of a power distribution device, Figure 5 is a structural schematic view of a second lock body of an interlocking device on one side of a power distribution device, Figure 6 is a structural schematic view of a second lock body of an interlocking device on the other side of a power distribution device.

[0028] In the embodiment of the utility model, the interlocking device is used for the switch device 600 and the power distribution device 700 controlled by the switch device 600, the switch device 600 comprises an on state and an off state, when the switch device 600 is in the on state, the switch device 600 controls the circuit that supplies power for the power distribution device 700 to open, and the power distribution device 700 is in the power supply state, when the switch device 600 is in the off state, the switch device 600 controls the circuit that supplies power for the power distribution device 700 to close, and the power distribution device 700 is in the power-off state.

[0029] In the embodiment, the switch device 600 is provided with a plate 400 on the side, and the switch device 600 can move along the surface of the plate 400, when the switch device 600 moves to the first position, the switch device 600 is in the on state, and when the switch device 600 moves to the second position, the switch device 600 is in the off state.

[0030] Combined with reference Figure 2 and Figure 3 , the switch device 600 can move along the surface of the plate 400 along the X direction, when the switch device 600 moves to the first position, as Figure 3The switch device 600 is shown in the position of the plate 400 in the X direction. The switch device 600 is in the open state. When the switch device 600 moves to the second position, as shown... Figure 2 The switch device 600 shown is positioned on the surface of the plate 400 in the X direction, and the switch device 600 is in the off state.

[0031] like Figure 1 As shown, in this embodiment, the switchgear 600 is a circuit breaker 510, which is installed in the central switch cabinet 500. The cabinet plate 501 of the central switch cabinet 500 located on either side of the circuit breaker 510 serves as a plate 400.

[0032] The 500-type central switchgear is an armored, withdrawable, metal-enclosed switchgear 600 used to receive and distribute electrical energy, and to control, protect, monitor, and measure circuits. Typically, the 500-type central switchgear consists of three layers: the upper layer is the busbar and instrument compartment, the middle layer is the circuit breaker compartment 510, and the lower layer is the cable compartment.

[0033] Specifically, in this embodiment, the circuit breaker 510 is provided with contacts at the rear. The circuit breaker 510 can move along the surface of the cabinet plate 501 of the circuit breaker 510. When the circuit breaker 510 moves to the first position, the rear contacts are electrically connected to the busbar, and the circuit is opened. When the circuit breaker 510 moves to the second position, the rear contacts are completely disconnected from the busbar, and the circuit is turned off.

[0034] like Figure 4 As shown, in this embodiment, the power distribution equipment 700 is a transformer 800. When the switch equipment 600 is in the open state, the transformer 800 is in the working state. When the switch equipment 600 is in the closed state, the transformer 800 is in the maintenance state.

[0035] Transformer 800 is used to change voltage levels, for example, to convert high voltage to a low voltage suitable for users to meet the power needs of different equipment. Transformer 800 is usually located after the intermediate switch 500 and is connected by cable.

[0036] The intermediate voltage switch 500 and the transformer 800 are closely integrated devices in a power system. The intermediate voltage switch 500, through its protection functions and structural design, provides a safe and reliable operating environment for the transformer 800, while the transformer 800, through its voltage conversion function, meets the user's power needs.

[0037] The first lock body 100 is used to lock and unlock the switchgear 600 in a specific state.

[0038] Specifically, in the embodiment, when the switch device 600 is in the on state, the first lock body 100 is only in the unlocked state, that is, when the switch device 600 is in the on state, the first lock body 100 always remains in the unlocked state and cannot be switched to the locked state, and only when the switch device 600 is in the off state, the locked state and the unlocked state of the first lock body 100 can be switched to each other, that is, only when the switch device 600 is in the off state, the first lock body 100 can be switched from the unlocked state to the locked state.

[0039] To this end, in the embodiment, the first lock body 100 is used to realize the locking and unlocking of the off state of the switch device 600.

[0040] Correspondingly, in the embodiment, when the circuit breaker 510 is in the on state, the first lock body 100 always remains in the unlocked state and cannot be switched to the locked state, and only when the circuit breaker 510 is in the off state, the first lock body 100 can be switched from the unlocked state to the locked state, so that the first lock body 100 is used to realize the locking and unlocking of the off state of the circuit breaker 510.

[0041] In the embodiment, the lock tongue 120 of the first lock body 100 is outwardly retractable from the lock hole 110, when the switch device 600 is in the on state, the lock hole 110 of the first lock body 100 is provided with a blocking piece 401, and when the switch device 600 is in the off state, the lock hole 110 of the first lock body 100 is left with a retracting space 402.

[0042] The lock tongue 120 of the first lock body 100 is outwardly retractable from the lock hole 110, when the lock hole 110 of the first lock body 100 is provided with the blocking piece 401, the lock tongue 120 cannot be retracted outwardly, the first lock body 100 always remains in the unlocked state, and when the lock hole 110 of the first lock body 100 is left with the retracting space 402, the lock tongue 120 can be retracted outwardly, and the first lock body 100 can be switched between the unlocked state and the locked state.

[0043] In the embodiment, only in the second position, the plate 400 is provided with the hole 410.

[0044] The hole 410 is used to provide the retracting space 402 for the lock tongue 120, and only in the second position, the plate 400 is provided with the hole 410, so that the first lock body 100 can be switched between the unlocked state and the locked state only when the first lock body 100 moves to the second position.

[0045] In the embodiment, the lock hole 110 of the first lock body 100 faces the plate 400, when the switch device 600 moves to the first position, the lock hole 110 is positioned by the plate 400 as the blocking piece 401, and when the switch device 600 moves to the second position, the hole 410 serves as the retracting space 402.

[0046] When the switch device 600 moves to the first position, the lock opening 110 is blocked by the blocking piece 401 formed by the plate 400, that is, the lock opening 110 is blocked by the plate 400, and the first lock body 100 always keeps the unlocked state. When the switch device 600 moves to the second position, the hole 410 serves as the telescopic space 402, that is, the lock tongue 120 can be telescopically inserted into the hole 410, so that the first lock body 100 can be rotated to switch from the unlocked state to the locked state. Meanwhile, the lock tongue 120 is inserted into the hole 410 and is clamped by the edge of the hole 410, so that the first lock body 100 cannot move along the X direction, thereby realizing the locking of the first lock body 100 on the off state of the switch device 600.

[0047] In the embodiment, when the first lock body 100 is in the locked state, the size of the lock tongue 120 of the first lock body 100 extending out of the lock opening 110 serves as the locking size, and the distance between the lock opening 110 of the first lock body 100 and the plate 400 is less than the locking size.

[0048] The distance between the lock opening 110 of the first lock body 100 and the plate 400 is less than the locking size, which is beneficial to ensure that the lock tongue 120 cannot completely extend out when the lock opening 110 is blocked by the plate 400, thereby ensuring that the first lock body 100 always keeps the unlocked state.

[0049] In the embodiment, the size of the hole 410 is greater than the maximum size of the surface of the lock tongue of the first lock body 100 facing the plate 400.

[0050] The size of the hole 410 is greater than the maximum size of the surface of the lock tongue of the first lock body 100 facing the plate 400, which is beneficial to the flexible telescopic movement of the lock tongue 120 into the hole 410, thereby making the switching of the first lock body 100 between the unlocked state and the locked state easy to realize.

[0051] In the embodiment, when the switch device 600 moves to the second position, the lock opening 110 is aligned with the hole 410.

[0052] The lock opening 110 is aligned with the hole 410, which is beneficial to the telescopic movement of the lock tongue 120 into the hole 410, thereby making the switching of the first lock body 100 easy to realize.

[0053] The second lock body 200 is used to realize the opening and closing of the box door 710 of the power distribution device 700.

[0054] Specifically, in the embodiment, when the second lock body 200 is in the locked state, the box door 710 is locked and closed, and when the second lock body 200 is in the unlocked state, the box door 710 is unlocked and can be opened.

[0055] Correspondingly, in the embodiment, the second lock body 200 is used to realize the opening and closing of the transformer 800.

[0056] In this embodiment, the box door 710 of the power distribution equipment 700 includes a first box door 711 (as shown) located at the primary side 801 of the transformer 800, and a second box door 712 (as shown) located at the secondary side 802 of the transformer 800. The second lock body 200 on the first box door 711 is a second door lock body 201, and the second lock body 200 on the second box door 712 is a second door lock body 202. The lock cylinder of the second door lock body 201 is different from that of the second door lock body 202. Figure 5 Figure 6 The second lock body 200 on the first box door 711 is a second door lock body 201, and the second lock body 200 on the second box door 712 is a second door lock body 202. The lock cylinder of the second door lock body 201 is different from that of the second door lock body 202.

[0057] The second lock body 200 on the first box door 711 is a second door lock body 201, and the second lock body 200 on the second box door 712 is a second door lock body 202. The lock cylinder of the second door lock body 201 is different from that of the second door lock body 202.

[0058] Correspondingly, in this embodiment, the first lock body 100 includes a first sub-lock body 101 corresponding to the second door lock body 201, and a second sub-lock body 102 corresponding to the second door lock body 202.

[0059] Correspondingly, in this embodiment, the first lock body 100 includes a first sub-lock body 101 corresponding to the second door lock body 201, and a second sub-lock body 102 corresponding to the second door lock body 202.

[0060] In other embodiments, the second lock body can also be provided on the first box door and the second box door, that is, the first box door and the second box door adopt the second lock body with the same lock cylinder. Correspondingly, one first lock body can be used to correspond to the second lock body of the first box door and the second box door.

[0061] The universal key 300 can be used to drive the first lock body 100 to switch between the unlocked state and the locked state, and can also be used to drive the second lock body 200 to switch between the unlocked state and the locked state, that is, the first lock body 100 and the second lock body 200 are adapted to one key.

[0062] ​Specifically, in the present embodiment, the universal key 300 can be separated from the first lock body 100 only when the first lock body 100 is in the locked state, that is, the universal key 300 can be pulled out of the first lock body 100 only when the first lock body 100 is in the locked state, while the universal key 300 cannot be pulled out when the first lock body 100 is in the unlocked state, and the universal key 300 can be separated from the second lock body only when the second lock body 200 is in the locked state, that is, the universal key 300 can be pulled out of the second lock body 200 only when the second lock body 200 is in the locked state, while the universal key 300 cannot be pulled out when the second lock body 200 is in the unlocked state.

[0063] In the embodiment, when the switch device 600 is in the on state, the first lock body 100 is only in the unlocked state, and only when the first lock body 100 is in the locked state, the universal key 300 can be separated from the first lock body 100, that is, when the switch device 600 is in the on state, the first lock body 100 cannot be separated from the universal key 300, and the universal key 300 cannot be pulled out of the first lock body 100, at this time, the second lock body 200 can only be in the locked state and cannot be switched to the unlocked state by the universal key 300, so when the power distribution device 700 is in the power supply state, the case door 710 of the power distribution device 700 is prevented from being opened by mistake, and the working personnel is prevented from being in contact with the power distribution device 700 in the power supply state by mistake, so as to protect the life safety of the working personnel. At the same time, only when the switch device 600 is in the off state, the locked state and the unlocked state of the first lock body 100 can be switched to each other, that is, only when the power distribution device 700 is in the power-off state, the universal key 300 can drive the first lock body 100 to the locked state to lock the power-off state of the power distribution device 700, at this time, the universal key 300 can be pulled out of the first lock body 100, and the universal key 300 can be used to drive the second lock body 200 to the unlocked state, and the case door 710 is opened, at this time, the power distribution device 700 is in the power-off state, so as to protect the safety of the personnel who needs to contact the power distribution device 700 for maintenance and other work, and avoid the case that the case door 710 is opened by mistake when the power distribution device 700 is in the power supply state, which endangers the safety of the personnel. In addition, when the case door 710 is opened, the second lock body 200 is in the unlocked state, and only when the second lock body 200 is in the locked state, the universal key 300 can be separated from the second lock body 200, so that the universal key 300 cannot be pulled out of the second lock body 200 at this time, and the locked state of the first lock body 100 cannot be switched to the unlocked state, so that the switch device 600 is always in the off state, and the power distribution device 700 is always in the power-off state, so as to avoid the case that the power distribution device 700 is mistakenly powered when the case door 710 is opened, and protect the life safety of the working personnel of the power distribution device 700. As can be seen from the above, the utility model embodiment adopts the interlocking device of the multiple lock bodies and the key, which is beneficial to avoid the case that the power distribution device 700 is mistakenly powered due to the mistaken operation of the working personnel on the switch device 600, so as to protect the life safety of the working personnel.

[0064] Specifically, in the cubicle 500 and the transformer 800, it is often necessary to maintain and repair the transformer 800, at this time, the circuit breaker 510 in the cubicle 500 needs to be completely powered off to ensure that the transformer 800 remains in a safe environment of power-off for the operating personnel to open the box door 710 for maintenance and repair. In the embodiment, when the circuit breaker 510 is in the open state, the first lock body 100 is only in the unlocked state, and only when the first lock body 100 is in the locked state, the universal key 300 can be separated from the first lock body 100, that is, when the circuit breaker 510 is in the open state, the first lock body 100 and the universal key 300 cannot be separated, and the universal key 300 cannot be pulled out of the first lock body 100, at this time, the second lock body 200 can only be in the locked state and cannot be switched to the unlocked state by the universal key 300, thereby avoiding the case that the box door 710 of the transformer 800 is mistakenly opened when the transformer 800 is in the power supply state, and avoiding the case that the operating personnel mistakenly contacts the transformer 800 in the power supply state, thereby ensuring the safety of the operating personnel. At the same time, only when the circuit breaker 510 is in the off state, the locked state and the unlocked state of the first lock body 100 can be switched to each other, that is, only when the transformer 800 is in the power-off state, the universal key 300 can drive the first lock body 100 to the locked state to lock the power-off state of the transformer 800, at this time, the universal key 300 can be pulled out of the first lock body 100, and the universal key 300 can be used to drive the second lock body 200 to the unlocked state, and the box door 710 is opened, at this time, the transformer 800 is in the power-off state, thereby ensuring the safety of the personnel who need to contact the transformer 800 for maintenance and repair, and avoiding the case that the box door 710 is mistakenly opened when the transformer 800 is in the power supply state, thereby endangering the safety of the personnel. In addition, when the box door 710 is opened, the second lock body 200 is in the unlocked state, and only when the second lock body 200 is in the locked state, the universal key 300 can be separated from the second lock body 200, at this time, the universal key 300 cannot be pulled out of the second lock body 200, and the locked state of the first lock body 100 cannot be switched to the unlocked state, so that the circuit breaker 510 is always in the off state, and the transformer 800 is always in the power-off state, thereby avoiding the case that the transformer 800 is mistakenly powered when the box door 710 is opened, and ensuring the safety of the operating personnel of the transformer 800. As can be seen from the above, the interlocking device with multiple lock bodies and one key is adopted in the embodiment, which is conducive to avoiding the case that the transformer 800 is mistakenly powered due to the mistaken operation of the operating personnel on the circuit breaker 510, thereby being conducive to ensuring the safety of the operating personnel.

[0065] In the embodiment, the universal key 300 includes a first universal key 301 which can be inserted into the second door lock body 201 and the first sub-lock body 101, and a second universal key 302 which can be inserted into the second door lock body 202 and the second sub-lock body 102.

[0066] The first universal key 301 is used to drive the state switching of the second door lock body 201 and the first sub lock body 101, and the second universal key 302 is used to drive the state switching of the third door lock body 202 and the second sub lock body 102, that is, a two-lock-one-key scheme is adopted, so that the primary side 801 and the secondary side 802 of the transformer 800 are controlled by different universal keys 300 respectively.

[0067] In other embodiments, a first lock body corresponds to the first cabinet door and the second cabinet door, that is, a three-lock-one-key scheme is adopted, and the primary side and the secondary side of the transformer are controlled by a universal key.

[0068] Although the utility model discloses as above, the utility model is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the utility model, can make various changes and modifications, therefore the protection scope of the utility model should be the range defined by the claims.

Claims

1. An interlocking device for a switchgear and power distribution equipment controlled by the switchgear, the switchgear including an open state and an off state, characterized in that, The interlocking device includes: A first lock body is located on the switching device. The first lock body includes a switchable locked state and an unlocked state. When the switching device is in the open state, the first lock body is only in the unlocked state, and the locked state and unlocked state of the first lock body can be switched between each other only when the switching device is in the off state. The second lock body is located on the door of the power distribution equipment. The second lock body includes a switchable locked state and an unlocked state. When the second lock body is in the locked state, the door is open. When the second lock body is in the unlocked state, the door is closed. A universal key can be inserted into the first lock body to drive the first lock body to switch states, and can also be inserted into the second lock body to drive the second lock body to switch states. The universal key can be separated from the first lock body only when the first lock body is in the locked state, and the universal key can be separated from the second lock body only when the second lock body is in the locked state.

2. The interlocking device as described in claim 1, characterized in that, The latch of the first lock body is retractable from the lock opening. When the switch is in the open state, the lock opening of the first lock body has a blocking element. When the switch is in the closed state, the lock opening of the first lock body has retraction space.

3. The interlocking device as described in claim 2, characterized in that, A plate is provided on the side of the switch device, and the switch device can move along the surface of the plate. When the switch device moves to the first position, the switch device is in the open state. When the switch device moves to the second position, the switch device is in the closed state. Only in the second position is a hole provided on the plate. The locking opening of the first lock body faces the plate. When the switching device moves to the first position, the locking opening is blocked by the plate. When the switching device moves to the second position, the hole serves as the telescopic space.

4. The interlocking device as described in claim 3, characterized in that, When the first lock body is in the locked state, the length of the bolt extending from the lock opening of the first lock body is used as the locking dimension, and the distance between the lock opening of the first lock body and the plate is less than the locking dimension.

5. The interlocking device as described in claim 3, characterized in that, The size of the hole is greater than the maximum size of the surface of the first lock body facing the plate.

6. The interlocking device as described in claim 3, characterized in that, When the switching device is moved to the second position, the lock opening is aligned with the hole.

7. The interlocking device as described in claim 3, characterized in that, The switching device is a circuit breaker, which is installed in a central switch cabinet. The cabinet panel located on either side of the circuit breaker serves as the panel.

8. The interlocking device as described in claim 1, characterized in that, The power distribution equipment is a transformer. When the switch is in the open state, the transformer is in the working state. When the switch is in the closed state, the transformer is in the maintenance state.

9. The interlocking device as described in claim 8, characterized in that, The power distribution equipment includes a first door located on the primary side of the transformer and a second door located on the secondary side of the transformer, and both the first door and the second door are equipped with the second lock body.

10. The interlocking device as described in claim 8, characterized in that, The power distribution equipment includes a first door located on the primary side of the transformer and a second door located on the secondary side of the transformer. The second lock body on the first door is a second first door lock body, and the second lock body on the second door is a second second door lock body. The lock cylinders of the second first door lock body and the second second door lock body are different. The first lock body includes a first sub-lock body corresponding to the second first door lock body, and a second sub-lock body corresponding to the second second door lock body; The universal key includes a first universal key that can be inserted into the second first door lock body and the first sub-lock body, and a second universal key that can be inserted into the second second door lock body and the second sub-lock body.

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