CN110707583B - Automatic locking device for isolation baffle, handcart type switch cabinet and working method - Google Patents
Automatic locking device for isolation baffle, handcart type switch cabinet and working method Download PDFInfo
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- CN110707583B CN110707583B CN201910893409.3A CN201910893409A CN110707583B CN 110707583 B CN110707583 B CN 110707583B CN 201910893409 A CN201910893409 A CN 201910893409A CN 110707583 B CN110707583 B CN 110707583B
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- 238000002955 isolation Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 13
- 230000009471 action Effects 0.000 claims abstract description 16
- 230000003068 static effect Effects 0.000 claims description 17
- 230000001960 triggered effect Effects 0.000 claims description 12
- 230000004888 barrier function Effects 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/24—Shutters or guards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
- H02B11/04—Isolating-contacts, e.g. mountings or shieldings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/167—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal truck type
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- Switch Cases, Indication, And Locking (AREA)
Abstract
The utility model discloses an automatic blocking device of an isolation baffle, which comprises a movable baffle and a second rod piece, wherein the movable baffle is matched with the second rod piece and is arranged in a handcart type switch cabinet, the movable baffle can intermittently block a stationary contact under the driving of the second rod piece so as to isolate the stationary contact from a movable contact on a handcart, the automatic blocking device also comprises a first rod piece, a proximity sensor and a blocking device, the first rod piece is hinged with the second rod piece, the first rod piece drives the second rod piece to ascend or descend under the action of the handcart, and the movable baffle can isolate the stationary contact from the movable contact when the stationary contact is just separated from the movable contact; when the movable contact breaks away from the fixed contact, the movable baffle shields the movable contact at the first time and locks the movable baffle, so that the charged fixed contact is completely shielded, and the movable baffle can be prevented from shaking.
Description
Technical Field
The disclosure relates to an automatic locking device of an isolation baffle, a handcart type switch cabinet and a working method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
High-voltage switch cabinets are widely applied to power distribution systems for receiving and distributing electric energy. Not only can a part of power equipment be put into or quit operation according to operation requirements, but also the fault part can be quickly cut off from the system when the power equipment is in fault, thereby ensuring the normal operation of the fault-free part in the power grid and the safety of the equipment and operation maintenance personnel. Therefore, the high-voltage switch cabinet is very important distribution equipment, and the safe and reliable operation of the high-voltage switch cabinet has very important significance to the system.
The high-voltage electrical equipment is provided with a perfect anti-misoperation locking device, has perfect anti-misoperation locking device function and is provided with a mechanical lock without the anti-misoperation locking function; along with the popularization and application of handcart-type cubical switchboard, basically, the cubical switchboard on the existing market all possesses "five prevent" functions, but each producer still has a problem of commonality exactly to be: the isolation baffle of the switch cabinet bus chamber and the breaker chamber can not be automatically locked, namely, the isolation baffle can be manually opened after the handcart is pulled out.
In order to ensure the reliability of power supply, reduce the times of power failure and require the development of state maintenance, the chances of bus power failure are less and less, and single-interval power failure is generally arranged; the inventor finds that the difficulty of a maintainer is not greatly influenced by single-interval power failure, but after the handcart is pulled out, an isolation baffle which cannot be automatically locked is easily opened by misoperation, and a live contact on the bus side is exposed, so that great hidden danger is brought to the personal safety of the maintainer; application number is 201820063828.5's chinese utility model patent provides a handcart-type cubical switchboard static contact adjustable fender interlock, through position sensor cooperation fastener, restrict through the flexible rotation transfer line's of fastener rotation, thereby block adjustable fender's transmission process, cooperation vertical transfer line realizes adjustable fender's restriction, but adjustable fender still can carry out rocking of small margin on vertical transfer line, produce the gap, exposed partial generating line side electrified contact, can't realize keeping out the isolation to the accurate of generating line side, still there is the potential safety hazard.
Disclosure of Invention
In order to solve the problems, the automatic locking device of the isolation baffle, the handcart type switch cabinet and the working method are provided, the movable baffle can be directly locked at a live contact point on a bus side through the locking device, the live contact point is accurately shielded and isolated, the safety of electric power overhaul personnel during live working is improved, and the potential safety hazard caused by exposed gaps is solved.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
an automatic locking device of an isolation baffle comprises a movable baffle and a second rod, wherein the movable baffle is matched with the second rod and is arranged in a handcart type switch cabinet, and the movable baffle can block a static contact under the driving of the second rod, so that the static contact is isolated from a movable contact on a handcart;
the handcart type safety device is characterized by further comprising a first rod piece, a first proximity sensor and a locking device, wherein the first rod piece is hinged with the second rod piece, the first rod piece drives the second rod piece to ascend or descend under the action of the handcart, and the movable baffle can isolate the fixed contact from the movable contact when the fixed contact is just separated from the movable contact;
the locking device is arranged on the inner wall of the switch cabinet and is electrically connected with a first proximity sensor, the first proximity sensor is used as a control switch of the locking device, the locking device comprises a telescopic rod, a through hole is formed in the movable baffle, the telescopic rod can be matched with the through hole to lock the position of the movable baffle, and the first proximity sensor is arranged on the inner wall of the switch cabinet and is close to the static contact.
One end of the first rod piece is hinged to the bottom end of the second rod piece, the other end of the first rod piece is connected with the slide way of the handcart in a sliding mode and can slide along the slide way under the action of the handcart, and therefore one end of the first rod piece, which is hinged to the bottom end of the second rod piece, can indirectly drive the movable baffle to move up and down through the second rod piece.
Preferably, a sliding groove is formed in the sliding way, a sliding block is installed at one end, connected with the sliding way of the handcart in a sliding mode, of the first rod piece, and the sliding block is installed in a matched mode with the sliding groove.
Furthermore, a bump is further arranged at one end of the first rod piece, which is in sliding connection with the slide way of the handcart, and is used for contacting the handcart and driving the first rod piece to move along the sliding groove.
Furthermore, two movable baffles are arranged and are arranged on the second rod piece to act synchronously and respectively correspond to the bus side static contact and the power utilization side static contact of the switch cabinet;
preferably, the two movable baffles are respectively and correspondingly provided with a locking device, and the first proximity sensor controls the actions of the two locking devices simultaneously.
Furthermore, the locking device further comprises an electromagnet and a spring, wherein the electromagnet is used for attracting the telescopic rod to extend out by overcoming the resistance of the spring when power is on, and releasing the telescopic rod when power is off so that the telescopic rod is retracted under the action of the spring.
And the second sensor is arranged at the inlet of the handcart of the switch cabinet and used for controlling the operation of the first proximity sensor.
The utility model also provides a handcart-type cubical switchboard, including foretell isolation barrier automatic blocking device, the handcart is installed in the cubical switchboard, through slide and cubical switchboard cooperation, the handcart can slide along the slide.
Further, still be provided with manual control switch to the fastener, manual control switch installs inside the cubical switchboard when manual control switch opens, the fastener shrink telescopic link removes the locking to adjustable fender, and artifical promotion adjustable fender removes to the position that does not shelter from the stationary contact, and after the maintenance stationary contact finishes, adjustable fender resumes the position that shelters from the stationary contact, closes manual control switch, the fastener extension telescopic link to lock the adjustable fender once more.
The present disclosure also provides a working method of the handcart type switch cabinet:
the handcart is pulled, the handcart slides along the slideway, the movable contact is gradually separated from the stationary contact, the first proximity sensor and the second proximity sensor are both in working states, the convex block of the first rod piece is pressed on the handcart and moves in a direction away from the stationary contact along with the handcart, and the second rod piece drives the movable baffle to gradually descend;
when the handcart drives the movable contact to just separate from the fixed contact, the first rod piece drives the second rod piece to drive the movable baffle to just isolate the movable contact from the fixed contact, and the fixed contact is completely shielded;
at the moment, the first proximity sensor cannot detect the handcart, and controls the locking device to extend out of the telescopic rod to be matched with the through hole in the movable baffle plate so as to lock the movable baffle plate;
along with the outward sliding of the handcart, the lug is not contacted with the handcart any more, the first rod piece is not moved any more, and the movable baffle plate keeps a locking state;
when the handcart slides out of the switch cabinet, the second sensor cannot detect the handcart, the power supply of the first proximity sensor is cut off, and the first proximity sensor cannot be triggered;
when the handcart is pushed to enter the switch cabinet, the second sensor is triggered, the power supply to the first proximity sensor is recovered, and the first proximity sensor is in a working state;
as the handcart continues to be pushed inwards, the handcart contacts the bump, the first proximity sensor is triggered, the locking device is controlled to withdraw the telescopic rod, and the movable baffle is unlocked;
the handcart continues to be pushed inwards, and when the handcart pushes the bump, the first rod piece drives the second rod piece to move, so that the movable baffle is driven to be far away from the stationary contact;
and when the movable baffle does not shield the static contact completely, the movable contact is just in complete butt joint with the movable contact.
Compared with the prior art, the beneficial effect of this disclosure is:
1. according to the electric contact protector, the fastener is matched with the proximity sensor, when the movable contact and the fixed contact are separated, the movable baffle shields the movable contact and locks the movable baffle at the first time, so that the charged fixed contact is completely shielded, and the movable baffle can be prevented from shaking; the isolation of the electrified contact in the electrified maintenance process is improved, and the operation safety of maintenance personnel is improved;
2. the first rod piece and the second rod piece are matched for transmission, compared with a driving mode that a screw rod is matched with a vertical lifting rod in the prior art, the structure is further simplified, the action path of the handcart for driving the movable baffle can be shortened, and the movable baffle is driven to act at the last stage when the handcart enters the switch cabinet, so that the interference of the outside on the transmission process is reduced;
3. the two proximity switches are arranged at far positions respectively, so that series two-stage control on the fastener is realized, misoperation of the fastener caused by the fact that a single switch is triggered due to maintenance is avoided, and the locking safety of the movable baffle is further improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic view of the switch cabinet and the handcart before maintenance according to the present disclosure;
fig. 2 is a schematic diagram of the switch cabinet and the handcart in the process of pulling out the handcart according to the present disclosure;
FIG. 3 is an enlarged view of a portion of the disclosure at A in FIG. 1;
FIG. 4 is a schematic view of the latch and flapper engagement configuration of the present disclosure;
wherein: 1. the device comprises a movable baffle, 2, a second rod piece, 3, a switch cabinet, 4, a handcart, 5, a stationary contact, 6, a movable contact, 7, a slideway, 8, a first proximity sensor, 9, a locking device, 10, a telescopic rod, 11, a sliding groove, 12, a sliding block, 13, a bump, 14 and a first rod piece.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
Example 1
The invention provides an automatic locking device of an isolation baffle, which comprises two movable baffles 1 and a second rod 2, wherein the two movable baffles are arranged on the second rod at a certain interval and are arranged in a handcart-type switch cabinet 3 through a supporting plate, and the second rod can slide up and down along a matching hole on the supporting plate, so that the movable baffles are driven to move up and down to block a stationary contact 5, and the stationary contact 5 is isolated from a movable contact 6 on a handcart;
the handcart type moving contact device further comprises a first rod piece 14, a first proximity sensor 8 and a locking device 9, wherein the first rod piece is hinged with a second rod piece, the first rod piece drives the second rod piece to ascend or descend under the action of the handcart, and the movable baffle plate can isolate the fixed contact from the moving contact when the fixed contact is just separated from the moving contact;
of course, it can be understood that, in order to ensure that no short circuit occurs between the movable contact and the fixed contact, when the gap between the movable contact and the fixed contact is greater than the thickness of the movable plate, the movable baffle can be positioned between the fixed contact and the movable contact, thereby avoiding the risk of short circuit; the movable plate can also be an insulating plate, so that short circuit when the movable baffle contacts the contact is avoided.
The locking device is installed on the inner wall of the switch cabinet and is electrically connected with a first proximity sensor, the first proximity sensor serves as a control switch of the locking device, the locking device comprises a telescopic rod 10, a through hole is formed in the movable baffle, the telescopic rod can be matched with the through hole to lock the position of the movable baffle, and the first proximity sensor is installed on the inner wall of the switch cabinet and is close to the static contact.
By matching the fastener with the first proximity sensor, when the movable contact and the fixed contact are separated, the movable baffle shields the movable contact and locks the movable baffle at the first time, so that the charged fixed contact is completely shielded, and the movable baffle can be prevented from shaking; the isolation of the electrified contact in the electrified maintenance process is improved, and the operation safety of maintenance personnel is improved.
It needs to point out very much, in order to guarantee the accurate cooperation of through-hole and telescopic link, set up the telescopic link into the toper or the blunt end toper that the diameter reduces gradually, improve through-hole and telescopic link complex fault-tolerance to along with the extension of telescopic link, the conical tip of through-hole cooperation telescopic link moves towards inside, calibrates the through-hole position gradually, finally makes the accurate stable cooperation of through-hole and telescopic link.
The handcart type switch cabinet provided by the present disclosure is further explained in detail as follows:
referring to fig. 1, 2, 3 and 4, a handcart type switch cabinet comprises the isolation baffle locking device, wherein a handcart is installed in the switch cabinet and matched with the switch cabinet through a slideway, and the handcart can slide along the slideway 7;
it can be understood that in other embodiments, when the handcart is moved by other mounting manners, such as a slide block and a slide rail, a limiting device is arranged at the matching connection position of the switch cabinet and the handcart, so that the handcart is prevented from falling off and being over-traveled, and the moving safety of the handcart is improved;
one end of the first rod piece is hinged with the bottom end of the second rod piece, the other end of the first rod piece is connected with the slide way of the handcart in a sliding mode and can slide along the slide way under the action of the handcart, and therefore one end hinged with the bottom end of the second rod piece can indirectly drive the movable baffle to move up and down through the second rod piece;
a sliding groove 11 is arranged on the sliding way, a sliding block 12 is arranged at one end of the first rod piece, which is in sliding connection with the sliding way of the handcart, and the sliding block and the sliding groove are installed in a matched mode; as shown in fig. 3;
and one end of the first rod piece, which is in sliding connection with the slide way of the handcart, is also provided with a convex block 13 for contacting the handcart and driving the first rod piece to move along the sliding way.
The main driving and transmission part is arranged as the isolation baffle, the first rod piece and the second rod piece are driven to act through the movement of the handcart, so that the action of the movable baffle is realized, an electric driving device is not required to be additionally arranged, and when the handcart drives the first rod piece to move, a mode of direct transmission of a connecting rod is adopted, so that the handcart is different from the rotation driving in the prior art, and the simplification of a transmission structure is realized;
the sliding groove is a closed groove, one end of the first rod piece is limited, the first rod piece can only move along the sliding groove, when the first rod piece moves in the sliding groove, the positions of the two ends are limit positions, and the positions which correspond to the positions where the movable baffle just completely shields the static contact and the positions where the movable baffle does not shield the static contact completely correspond to the movable baffle respectively.
The handcart is driven by the connecting rod to move, so that the action path of the handcart for driving the movable baffle can be shortened, and the movable baffle is driven to move at the final stage when the handcart enters the switch cabinet, thereby reducing the interference of the outside on the transmission process; the movable contact and the fixed contact can be isolated in the first time after the fixed contact and the movable contact are separated, and the potential safety hazard is further reduced.
In the field of handcart type switch cabinets, the handcart type switch cabinet not only comprises a static contact at a bus side, but also comprises a static contact at a power utilization side/circuit breaker side, so that the handcart type switch cabinet has the advantages that the two movable baffles are arranged in a targeted manner, are arranged on the second rod piece and act synchronously and respectively correspond to the static contact at the bus side and the static contact at the power utilization side of the switch cabinet;
the two movable baffles are respectively and correspondingly provided with a fastener, and the first proximity sensor controls the actions of the two fasteners simultaneously.
It will be appreciated that in other embodiments, the two shutters can be connected and fixed together by additional rods, so as to achieve the common action of the two movable shutters; of course, two locking devices can be symmetrically arranged on one baffle plate to ensure uniform stress on two sides.
The locking device also comprises an electromagnet and a spring, wherein the electromagnet is used for attracting the telescopic rod to overcome the resistance of the spring to extend out when power is on, and releasing the telescopic rod when power is off so that the telescopic rod is retracted under the action of the spring;
it will be appreciated that the latch can be actuated rapidly to ensure the speed of latching, although other telescopic arrangements may be used, such as an electromagnet in combination with a magnet to achieve intermittent attraction and repulsion to control the engagement of the rod with the through-hole; as long as can stabilize with the through-hole cooperation, and can realize can the stable locking of adjustable fender.
The second sensor is arranged at an inlet of the handcart of the switch cabinet and used for controlling whether the first proximity sensor operates or not;
at electrified maintenance in-process, in order to guarantee the effect of overhauing, often still need visit in the cubical switchboard and inspect, if only set up a first proximity sensor, then when maintainer's instrument or health position reached first proximity sensor's detection range, will cause opening of dead lock to relieve the locking to adjustable fender, when arousing adjustable fender's activity, can't shelter from electrified contact completely, cause the electric shock danger.
The two proximity switches are arranged at a far distance and are respectively triggered to control whether the proximity switches supply power or not, series two-stage control over the locking device is achieved, when the movable baffle is overhauled, the locking device can be prevented from being mistakenly operated due to the fact that a single switch is triggered in maintenance, and the locking safety of the movable baffle is further improved.
Example two
In this embodiment, a working method of the handcart type switch cabinet disclosed in the first embodiment is provided:
when the handcart needs to be pulled out for maintenance:
the handcart is pulled, the handcart slides along the slideway, the movable contact is gradually separated from the stationary contact, the first proximity sensor and the second proximity sensor are both in working states, the convex block of the first rod piece is pressed on the handcart and moves in a direction away from the stationary contact along with the handcart, and the second rod piece drives the movable baffle to gradually descend;
when the handcart drives the movable contact to just separate from the fixed contact, the first rod piece drives the second rod piece to drive the movable baffle to just isolate the movable contact from the fixed contact, and the fixed contact is completely shielded;
at the moment, the first proximity sensor cannot detect the handcart, and controls the locking device to extend out of the telescopic rod to be matched with the through hole in the movable baffle plate so as to lock the movable baffle plate;
along with the outward sliding of the handcart, the lug is not contacted with the handcart any more, the first rod piece is not moved any more, and the movable baffle plate keeps a locking state;
when the handcart slides out of the switch cabinet, the second sensor cannot detect the handcart, the power supply of the first proximity sensor is cut off, and the first proximity sensor cannot be triggered;
at the moment, the switch cabinet can be safely overhauled in a live way.
After the overhaul finishes, when needing to reset the handcart:
when the handcart is pushed to enter the switch cabinet, the second sensor is triggered, the power supply to the first proximity sensor is recovered, and the first proximity sensor is in a working state;
as the handcart continues to be pushed inwards, the handcart contacts the bump, the first proximity sensor is triggered, the locking device is controlled to withdraw the telescopic rod, and the movable baffle is unlocked;
the handcart continues to be pushed inwards, and when the handcart pushes the bump, the first rod piece drives the second rod piece to move, so that the movable baffle is driven to be far away from the stationary contact;
the movable baffle plate gradually rises along with the further movement of the handcart, and when the movable baffle plate does not shield the static contact completely, the movable contact is just in butt joint with the movable contact completely;
at this time, the maintenance work is completed, and the power supply is resumed.
It needs to point out very much, need overhaul the in-process sometimes and overhaul the stationary contact, just need open adjustable fender this time, to this, this application has still set up a manual control switch to the dead lock, manual control switch installs inside the cubical switchboard when manual control switch opens, the dead lock shrink telescopic link removes the locking to adjustable fender, and the manual work promotes adjustable fender and moves to the position that does not shelter from the stationary contact, and when overhauing the stationary contact and finishing the back, adjustable fender resumes the position that shelters from the stationary contact, closes manual control switch, the dead lock extension telescopic link to lock the adjustable fender once more. Thereby the maintenance process of stationary contact has been realized.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (9)
1. An automatic locking device of an isolation baffle comprises a movable baffle and a second rod piece, wherein the movable baffle is matched with the second rod piece and is installed in a handcart type switch cabinet, the movable baffle can block a stationary contact under the driving of the second rod piece so as to isolate the stationary contact from a movable contact on a handcart, the automatic locking device is characterized by further comprising a first rod piece, a first proximity sensor and a locking device, the first rod piece is hinged with the second rod piece, the first rod piece drives the second rod piece to ascend or descend under the action of the handcart, the movable baffle can isolate the stationary contact from the movable contact when the stationary contact and the movable contact are just separated, the locking device is installed on the inner wall of the switch cabinet, the locking device is electrically connected with the first proximity sensor, the first proximity sensor serves as a control switch of the locking device, the locking device comprises a telescopic rod, a through hole is formed in the movable baffle, and the telescopic rod can be matched with the through hole to lock the position of the movable baffle, the first proximity sensor is arranged on the inner wall of the switch cabinet and is close to the static contact;
the second proximity sensor is arranged at an inlet of the handcart of the switch cabinet and used for controlling the first proximity sensor to operate or not.
2. The automatic locking device for the isolating baffle plate according to claim 1, wherein one end of the first rod piece is hinged to the bottom end of the second rod piece, the other end of the first rod piece is connected with a slide way of a handcart in a sliding mode and can slide along the slide way under the action of the handcart, and therefore one end hinged to the bottom end of the second rod piece can indirectly drive the movable baffle plate to move up and down through the second rod piece.
3. The automatic locking device for the isolation baffle according to claim 2, wherein a chute is arranged on the chute, a sliding block is arranged at one end of the first rod piece, which is in sliding connection with the chute of the handcart, and the sliding block is arranged in cooperation with the chute.
4. The automatic locking device for the isolation baffle as claimed in claim 3, wherein the end of the first rod member slidably connected with the slideway of the handcart is further provided with a projection for contacting the handcart to drive the first rod member to move along the slideway.
5. The self-locking device of claim 1, wherein two of said movable shutters are mounted on the second rod member for synchronous movement, respectively corresponding to the bus-side stationary contact and the power-side stationary contact of the switchgear.
6. The automatic isolating barrier latching unit of claim 5 wherein each of the two movable barriers has a latch and the first proximity sensor controls the actuation of both latches simultaneously.
7. The self-latching isolating stop as in claim 1, wherein the latch further comprises an electromagnet, a spring, the electromagnet being adapted to attract the telescoping rod to extend against the resistance of the spring when energized and to release the telescoping rod to retract the telescoping rod under the action of the spring when de-energized.
8. A handcart type switch cabinet, characterized by comprising an isolation baffle automatic locking device according to any one of claims 1 to 7, wherein a handcart is arranged in the switch cabinet and is matched with the switch cabinet through a slideway, and the handcart can slide along the slideway.
9. A method of operating a handcart type switchgear cabinet according to claim 8,
the handcart is pulled, the handcart slides along the slideway, the movable contact is gradually separated from the stationary contact, the first proximity sensor and the second proximity sensor are both in working states, the convex block of the first rod piece is pressed on the handcart and moves in a direction away from the stationary contact along with the handcart, and the second rod piece drives the movable baffle to gradually descend;
when the handcart drives the movable contact to just separate from the fixed contact, the first rod piece drives the second rod piece to drive the movable baffle to just isolate the movable contact from the fixed contact, and the fixed contact is completely shielded;
at the moment, the first proximity sensor cannot detect the handcart, and controls the locking device to extend out of the telescopic rod to be matched with the through hole in the movable baffle plate so as to lock the movable baffle plate;
along with the outward sliding of the handcart, the lug is not contacted with the handcart any more, the first rod piece is not moved any more, and the movable baffle plate keeps a locking state;
when the handcart slides out of the switch cabinet, the second proximity sensor cannot detect the handcart, the power supply of the first proximity sensor is cut off, and the first proximity sensor cannot be triggered;
when the handcart is pushed to enter the switch cabinet, the second proximity sensor is triggered, the power supply to the first proximity sensor is recovered, and the first proximity sensor is in a working state;
as the handcart continues to be pushed inwards, the handcart contacts the bump, the first proximity sensor is triggered, the locking device is controlled to withdraw the telescopic rod, and the movable baffle is unlocked;
the handcart continues to be pushed inwards, and when the handcart pushes the bump, the first rod piece drives the second rod piece to move, so that the movable baffle is driven to be far away from the stationary contact;
and when the movable baffle does not shield the static contact completely, the movable contact is just in complete butt joint with the movable contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112332286B (en) * | 2020-11-12 | 2022-05-20 | 贵州电网有限责任公司 | Switch cabinet isolation baffle |
| CN114050496B (en) * | 2021-11-24 | 2023-09-22 | 国网山东省电力公司莒南县供电公司 | Locking device for circuit breaker handcart position |
| CN115483068B (en) * | 2022-09-16 | 2023-08-04 | 平高集团智能电力科技有限公司 | Universal breaker safety door |
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| CN202050179U (en) * | 2011-04-20 | 2011-11-23 | 安徽省电力公司宿州供电公司 | Electromagnetic locking device for switch cabinet |
| JP2014033590A (en) * | 2012-08-06 | 2014-02-20 | Chugoku Electric Power Co Inc:The | Switchgear |
| CN204464839U (en) * | 2015-03-24 | 2015-07-08 | 万控（天津）电气有限公司 | Shutter mechanism of switch cabinet |
| CN106684748B (en) * | 2015-11-09 | 2019-05-28 | 浙江正泰电器股份有限公司 | The burst disk of breaker |
| CN207691305U (en) * | 2018-01-15 | 2018-08-03 | 灵川供电有限公司 | A kind of fixed contact on handcart-type switch cabinet flapper interlock |
| CN109861125A (en) * | 2019-04-01 | 2019-06-07 | 银川市立恒电气设备有限公司 | Intrinsic safety type Intellect electrical switch cabinet |
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