CN210378866U - Mechanical key interlocking device of ring main unit - Google Patents

Abstract

The utility model discloses a mechanical key interlock of looped netowrk cabinet, including installing in the other first key lock of looped netowrk cabinet A's earthing switch handle hole and installing in the other second key lock of looped netowrk cabinet B's load switch handle hole, first key lock and second key lock share one first unblock key, the second changes the tongue can drive the motion of interlocking lever B between looped netowrk cabinet B inscription earthing switch and the load switch and block looped netowrk cabinet B's load switch handle hole, first commentaries on classics tongue can block looped netowrk cabinet A's earthing switch handle hole, cooperation through first key lock and second key lock makes looped netowrk cabinet A's earthing switch and looped netowrk cabinet B's load switch form mechanical interlocking. The utility model discloses a first key lock and second key lock simple structure easily install, can install additional under the condition that does not change looped netowrk cabinet inner structure, make looped netowrk cabinet A's earthing switch and looped netowrk cabinet B's load switch form mechanical interlocking, do not receive the distance restriction, need not the line between adjacent looped netowrk cabinet.

Description

Mechanical key interlocking device of ring main unit

Technical Field

The utility model relates to a looped netowrk cabinet technical field, concretely relates to mechanical key interlock of looped netowrk cabinet.

Background

At present, in a 10kV ring network system transformer substation, an interlocking structure between a load switch of a ring main unit and a grounding switch of an adjacent switch station is lacked between load switch ring main units of adjacent switch stations, when the ring main unit is maintained, the load switch of the ring main unit needs to be opened and the grounding switch needs to be closed, and before the grounding switch of the ring main unit needs to be closed, the load switches of the ring main unit and the adjacent switch cabinet need to be opened. And the adjacent ring main units are often far away from each other, and it is difficult to ensure that the load switches of the two ring main units are both in an open state before the grounding switch is switched on, and the load switches are not switched on by misoperation, so that great potential safety hazards exist. In the prior art, the interlocking rod of the earthing switch of the ring main unit and the load switch of the ring main unit is interlocked, that is, when the operating rod is inserted into the operating hole of the earthing switch of the ring main unit to close the earthing switch of the ring main unit, the interlocking rod between the earthing switch and the load switch tilts to one side and blocks the operating hole of the load switch of the ring main unit to prevent the operating rod from being inserted into the operating hole of the load switch of the ring main unit to open or close the ring main unit, and when the operating rod is inserted into the operating hole of the load switch of the ring main unit to close the load switch of the ring main unit, the interlocking rod between the earthing switch and the load switch tilts to the other side and blocks the operating hole of the earthing switch of the ring main unit to prevent the operating rod from being inserted into the operating hole of the load switch of the ring main unit to open or close the ring main unit, thereby realizing the interlocking of the earthing switch and the load switch, whether the load switch of the adjacent cabinet is switched off or not can not be determined, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a mechanical key interlock of looped netowrk cabinet, its cooperation through first key lock and second key lock makes looped netowrk cabinet A's earthing switch and looped netowrk cabinet B's load switch form mechanical interlocking, the security when guaranteeing earthing switch combined floodgate.

In order to achieve the purpose, the utility model is realized by the following technical proposal:

a mechanical key interlocking device of a ring main unit comprises a first key lock which can be arranged beside an operation hole of a grounding switch of the ring main unit A and a second key lock which can be arranged beside an operation hole of a load switch of the ring main unit B, wherein the first key lock and the second key lock are both rotary latch locks which can be unlocked to pull out keys, the first key lock and the second key lock share a first unlocking key, when the load switch of the ring main unit B is in a closing state, an interlocking rod B between the grounding switch and the load switch in the ring main unit B and a second rotary latch of the second key lock can form limit matching to ensure that the second rotary latch of the second key lock can not rotate to unlock, when the load switch of the ring main unit B is opened and the operation rod is pulled out, the first unlocking key is rotated to ensure that the second key lock is in an unlocking state, the second rotary latch of the second key lock can drive the interlocking rod B between the grounding switch and the load switch in the ring main unit B to move, one end of the interlocking rod B can block an operation hole of a load switch of the ring main unit B, when the first key lock is in an unlocking state, a first rotating tongue of the first key lock can block an operation hole of a grounding switch of the ring main unit A, when the first key lock is in a locking state, the first rotating tongue can be far away from the operation hole of the grounding switch of the ring main unit A, so that the operating rod can be inserted for switching on the grounding switch, after the grounding switch of the ring main unit A is switched on, the interlocking rod A between the grounding switch and the load switch in the ring main unit A can form limit matching with the first rotating tongue, so that the first unlocking key on the first key lock cannot be unlocked and pulled out, and the grounding switch of the ring main unit A and the load switch of the ring main unit B can form mechanical interlocking through matching of the first key lock and the second key lock.

Furthermore, a first action part and a second action part are respectively formed at two opposite ends of a second rotating tongue of the second key lock, a microswitch connected in series with a load switch motor loop of the ring main unit B is fixedly arranged on the second key lock, when the second key lock is in an unlocking state, the first action part and the interlocking rod B in the ring main unit B form interference fit, so that one end of the interlocking rod B can block a load switch operating hole of the ring main unit B, and the second action part simultaneously triggers the microswitch to disconnect the load switch motor loop of the ring main unit B.

Further, the normally closed end of the microswitch is connected in series in the load switch motor loop of the ring main unit B, when the second key lock is in an unlocking state, the second action part of the second rotating tongue can be matched with the trigger rod of the microswitch to close the normally open end of the microswitch, the normally closed end is disconnected, so that the load switch motor loop of the ring main unit B is disconnected, when the second key lock is in a locking state, the second action part of the second rotating tongue can be separated from the trigger rod of the microswitch to be matched to disconnect the normally open end of the microswitch, the normally closed end is closed, and so that the load switch motor loop of the ring main unit B is closed.

Furthermore, a stopping part is formed at the end part of the first rotating tongue of the first key lock, and when the first key lock is in an unlocking state, the stopping part can block the grounding switch operation hole of the ring main unit A so as to prevent an operating rod from being inserted into the grounding switch operation hole to perform switching-off or switching-on operation of the grounding switch.

Furthermore, a third key lock is installed beside an operation hole of the grounding switch of the ring main unit B, a fourth key lock is installed beside an operation hole of the load switch of the ring main unit A, the third key locks the fourth key lock, the fourth key lock is respectively identical to the first key lock and the second key lock in structure, the third key lock and the fourth key lock share a second unlocking key, and the grounding switch of the ring main unit B and the load switch of the ring main unit A are mechanically interlocked through the cooperation of the third key lock and the fourth key lock.

Looped netowrk cabinet's mechanical key interlock, have following advantage:

1. the first key lock and the second key lock are simple in structure and easy to install, the first key lock and the second key lock can be additionally installed under the condition that the internal structure of the ring main unit is not changed, the earthing switch of the ring main unit A and the load switch of the ring main unit B form mechanical interlocking, the distance is not limited, connection between adjacent ring main units is not needed, and the process of removing the interlocking between the ring main units is simple, convenient and quick.

2. When the second key lock is in an unlocking state, the first action part and the interlocking rod B in the ring main unit B form interference fit to enable one end of the interlocking rod B to block a load switch operation hole of the ring main unit B, and the second action part simultaneously triggers the micro switch to enable a load switch motor loop of the ring main unit B to be disconnected, so that the situation that the load switch of the ring main unit B cannot be locally inserted into the operation rod to perform switching-on operation and cannot be remotely controlled to perform switching-on can be accurately guaranteed, and the personal safety of maintenance personnel is well guaranteed.

Drawings

Fig. 1 is a schematic perspective view of a first key lock according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second key lock according to an embodiment of the present invention.

Description of reference numerals:

1. the lock comprises a first key lock, 2, a second key lock, 11, a first rotating tongue, 21, a second rotating tongue, 22, a microswitch, 111, a stopping part, 211, a first acting part, 212 and a second acting part.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1 and fig. 2, in the present embodiment, a mechanical key interlock device for a ring main unit includes a first key lock 1 capable of being installed beside an operation hole of a ground switch of a ring main unit a and a second key lock 2 capable of being installed beside an operation hole of a load switch of a ring main unit B, the first key lock 1 and the second key lock 2 are both tumbler locks which are in an unlocked state and can only pull out a key, and the first key lock 1 and the second key lock 2 share a first unlocking key, when a load switch of the ring main unit B is in a closed state, an interlock rod B between the ground switch and the load switch in the ring main unit B can form a limit fit with a second tumbler 21 of the second key lock 2 to prevent the second tumbler 21 of the second key lock 2 from rotating and unlocking the ring main unit B, when the load switch of the ring main unit B is opened and the operation rod is pulled out, the first unlocking key is rotated to make the second key lock 2 in an unlocked state, the second rotating tongue 21 of the second key lock 2 can drive the interlocking rod B to move, so that one end of the interlocking rod B can block a load switch operation hole of the ring main unit B, when the first key lock 1 is in an unlocking state, the first rotating tongue 11 of the first key lock 1 can block a ground switch operation hole of the ring main unit A, when the first key lock 1 is in a locking state, the first rotating tongue 11 can be far away from the ground switch operation hole of the ring main unit A, so that the operating rod can be inserted for ground switch closing, after the ground switch of the ring main unit A is closed, the position limiting matching can be formed between the ground switch and the load switch in the ring main unit A and the first rotating interlocking tongue 11, so that a first unlocking key on the first key lock 1 cannot be unlocked and pulled out, and the ground switch of the ring main unit A and the load switch of the ring main unit B can be mechanically interlocked through the matching of the first key lock 1 and the second key lock 2.

Referring to fig. 1 and fig. 2, in the embodiment, preferably, a first action portion 211 and a second action portion 212 are respectively formed on two opposite ends of the second rotating tongue 21 of the second key lock 2, a micro switch 22 connected in series with a load switch motor circuit of the ring main unit B is fixedly disposed on the second key lock 2, when the second key lock 2 is in an unlocked state, the first action portion 211 and the interlocking rod B in the ring main unit B form interference fit so that one end of the interlocking rod B can block a load switch operation hole of the ring main unit B, and the second action portion 212 simultaneously triggers the micro switch 22 to disconnect the load switch motor circuit of the ring main unit B.

Referring to fig. 1 and fig. 2, in the present embodiment, preferably, a normally closed end of the micro switch 22 is serially connected to a load switch motor circuit of the ring main unit B, when the second key lock 2 is in an unlocked state, the second action portion 212 of the second rotating tongue 21 can cooperate with the trigger rod of the micro switch 22 to close the normally open end of the micro switch 22, and the normally closed end is opened, so that the load switch motor circuit of the ring main unit B is opened, and when the second key lock 2 is in a locked state, the second action portion 212 of the second rotating tongue 21 can disengage from the trigger rod of the micro switch 22 to open the normally open end of the micro switch 22, and the normally closed end is closed, so that the load switch motor circuit of the ring main unit B is closed.

Referring to fig. 1, in the embodiment, preferably, a stopping portion 111 is formed on an end portion of the first rotating tongue 11 of the first key lock 1, and when the first key lock 1 is in an unlocked state, the stopping portion 111 can block an earthing switch operation hole of the ring main unit a to prevent an operating rod from being inserted into the earthing switch operation hole to perform an opening or closing operation of the earthing switch.

In the embodiment, the first key lock 1 and the second key lock 2 are simple in structure and easy to install, the first key lock 1 and the second key lock 2 can be additionally installed under the condition that the internal structure of the ring main unit is not changed, the grounding switch of the ring main unit A and the load switch of the ring main unit B form mechanical interlocking, the distance is not limited, the connection between adjacent ring main units is not needed, and the process of removing the interlocking between the ring main units is simple, convenient and quick. In this embodiment, since the first key lock 1 and the second key lock 2 share a first unlocking key to unlock, and the first key lock 1 and the second key lock 2 are both tumbler locks that can only be pulled out of the key when in an unlocked state, in an initial working state, the load switches of the ring main unit a and the ring main unit B are both in a closed state, the ground switches of the ring main unit a and the ring main unit B are both in an open state, the interlocking rod a and the interlocking rod B are in an inclined state and block the ground switch operation holes of the ring main unit a and the ring main unit B, respectively, at this time, the ground switch operation holes of the ring main unit a and the ring main unit B cannot be inserted with the operating rods to perform opening of the ground switches, when the ground switch of the ring main unit a or the ring main unit B needs to be opened, the load switches of the ring main unit a and the ring main unit B need to be first operated to be opened, and, initially, the second key lock 2 is in a locked state, when the first unlocking key is left in the second key lock 2 and can not be pulled out, when the load switch is operated to open the switch, firstly, the load switch of the ring main unit A is ensured to be opened, then the operating rod is inserted into the load switch operating hole of the ring main unit B, the operating rod is rotated to open the load switch of the ring main unit B, then the operating rod is pulled out, the interlocking rod B in the ring main unit B can be changed into a vertical state from an inclined state, then the first unlocking key on the second key lock 2 is rotated to enable the second key lock 2 to be in an unlocking state, at the moment, the second rotating tongue 21 of the second key lock 2 is rotated, the first acting part 211 on the second rotating tongue 21 can form interference fit with the interlocking rod B in the ring main unit B and drive the interlocking rod B to move, so that one end of the rod B can block the load switch operating hole of the ring main unit B, and the load switch closing operation can be prevented from being carried out by inserting the operating rod into the load switch operating hole again, and the second action part 212 simultaneously triggers the micro switch 22 to disconnect the load switch motor loop of the ring main unit B, thereby preventing someone from accidentally touching the load switch motor control key in a control room to cause the load switch to be switched on under remote control, and further exactly ensuring that the load switch of the ring main unit B cannot be switched on again as long as the second key lock 2 is in an unlocking state. At this time, because the second key lock 2 is in the unlocking state, the first unlocking key thereon can be pulled out, then the first unlocking key is brought to the ring main unit a, and the first unlocking key is inserted into the first key lock 1 beside the ground switch operation hole of the ring main unit a, initially, the first key lock 1 is in the unlocking state, the rotary tongue 11 of the first key lock 1 blocks the ground switch operation hole of the ring main unit a (if the load switch of the ring main unit B is not opened, the second key lock 2 cannot be unlocked due to the limit matching of the interlocking rod B and the second rotary tongue 21, and after the load switch of the ring main unit B is opened, if the second key lock 2 on the ring main unit B is not unlocked, the first unlocking key cannot be pulled out, and the first key lock 1 on the ring main unit a cannot be locked, the ground switch operation hole of the ring main unit a is blocked, and the operating rod cannot be inserted into the ground switch operation hole to perform the ground switch opening operation of the ring main unit a), after the first unlocking key is rotated to enable the first key lock 1 to be in a locked state, the first rotating tongue 11 can be far away from an operation hole of the grounding switch of the ring main unit A, so that an operation rod can be inserted to perform grounding switch closing, and after the grounding switch of the ring main unit A is closed, the interlocking rod A between the grounding switch and the load switch in the ring main unit A can form limit matching with the first rotating tongue 11 to enable the first unlocking key on the first key lock 1 to be unlocked and pulled out, so that the load switch on the ring main unit B can not be closed after the grounding switch of the ring main unit A is closed, and further, a maintenance worker can safely maintain the ring main unit A.

In this embodiment, a third key lock is installed beside an operation hole of an earthing switch of the ring main unit B, a fourth key lock is installed beside an operation hole of a load switch of the ring main unit a, the third key locks the fourth key lock, the fourth key lock is respectively identical in structure and installation position with the first key lock 1 and the second key lock 2, the third key lock and the fourth key lock share a second unlocking key, and the earthing switch of the ring main unit B and the load switch of the ring main unit a are mechanically interlocked through cooperation of the third key lock and the fourth key lock. In this embodiment, the switching-on operation flow of the grounding switch of the ring main unit B is the same as the switching-on operation flow of the grounding switch of the ring main unit a.

The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; these modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and therefore, all other embodiments obtained by those skilled in the art without any creative effort fall within the protection scope of the present invention.

Claims (5)

1. The utility model provides a mechanical key interlock of looped netowrk cabinet which characterized in that: the key unlocking device comprises a first key lock (1) capable of being installed beside an operation hole of a grounding switch of a ring main unit A and a second key lock (2) capable of being installed beside an operation hole of a load switch of a ring main unit B, wherein the first key lock (1) and the second key lock (2) are both rotating tongue locks which are in unlocking states and can only pull out keys, the first key lock (1) and the second key lock (2) share a first unlocking key, when the load switch of the ring main unit B is in a closing state, an interlocking rod B between an earthing switch and the load switch in the ring main unit B and a second rotating tongue (21) of the second key lock (2) can form limiting matching to enable the second rotating tongue (21) of the second key lock (2) to be incapable of rotating and further unlocking, after the load switch of the ring main unit B is opened and the operation rod is pulled out, the first unlocking key is rotated to enable the second key lock (2) to be in an unlocking state, and the second rotating tongue (21) of the second key lock (2) can drive the second rotating tongue (21) between the earthing switch B and the load switch in the ring main unit The interlocking rod B moves to enable one end of the interlocking rod B to block a load switch operating hole of the ring main unit B, when the first key lock (1) is in an unlocking state, the first rotating tongue (11) of the first key lock (1) can block the operation hole of the grounding switch of the ring main unit A, when the first key lock (1) is in a locking state, the first rotating tongue (11) can be far away from an operation hole of the grounding switch of the ring main unit A, so that an operation rod can be inserted to carry out switching on of the grounding switch, and when the grounding switch of the ring main unit A is switched on, the interlocking rod A between the grounding switch and the load switch in the ring main unit A can form limit matching with the first rotating tongue (11) to ensure that the first unlocking key on the first key lock (1) can not be unlocked and pulled out, the grounding switch of the ring main unit A and the load switch of the ring main unit B form mechanical interlocking through the matching of the first key lock (1) and the second key lock (2).

2. The mechanical key interlock of a looped network cabinet of claim 1, characterized in that: the two opposite ends of a second rotating tongue (21) of the second key lock (2) are respectively provided with a first acting part (211) and a second acting part (212), the second key lock (2) is fixedly provided with a micro switch (22) connected in series with a load switch motor loop of the ring main unit B, when the second key lock (2) is in an unlocking state, the first acting part (211) and the interlocking rod B in the ring main unit B form interference fit to enable one end of the interlocking rod B to block a load switch operating hole of the ring main unit B, and the second acting part (212) simultaneously triggers the micro switch (22) to disconnect the load switch motor loop of the ring main unit B.

3. The mechanical key interlock of a looped network cabinet of claim 2, characterized in that: the normally closed end of the microswitch (22) is connected in series in a load switch motor loop of the ring main unit B, when the second key lock (2) is in an unlocking state, the second action part (212) of the second rotating tongue (21) can be matched with a trigger rod of the microswitch (22) to enable the normally open end of the microswitch (22) to be closed, the normally closed end is disconnected, the load switch motor loop of the ring main unit B is disconnected, when the second key lock (2) is in a locking state, the second action part (212) of the second rotating tongue (21) can be separated from the trigger rod of the microswitch (22) to enable the normally open end of the microswitch (22) to be disconnected, the normally closed end is closed, and the load switch motor loop of the ring main unit B is closed.

4. The mechanical key interlock of a looped network cabinet of claim 1, characterized in that: a stopping part (111) is formed at the end part of the first rotating tongue (11) of the first key lock (1), and when the first key lock (1) is in an unlocking state, the stopping part (111) can block an operation hole of the grounding switch of the ring main unit A so as to prevent an operating rod from being inserted into the operation hole of the grounding switch to perform switching-off or switching-on operation of the grounding switch.

5. The mechanical key interlocking device of the ring main unit as claimed in any one of claims 1 to 4, wherein: a third key lock is installed beside an earthing switch operation hole of the ring main unit B, a fourth key lock is installed beside a load switch operation hole of the ring main unit A, the third key locks the fourth key lock, the fourth key lock is the same as the first key lock (1) and the second key lock (2) in structure, the third key lock and the fourth key lock share a second unlocking key, and the earthing switch of the ring main unit B and the load switch of the ring main unit A are mechanically interlocked through the cooperation of the third key lock and the fourth key lock.

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