CN-224217387-U - Cabinet door interlocking device with reverse locking function

CN224217387UCN 224217387 UCN224217387 UCN 224217387UCN-224217387-U

Abstract

The utility model discloses a cabinet door interlocking device with reverse locking, which comprises a compartment partition plate, a slidable interlocking slide plate arranged on the upper plate surface of the compartment partition plate, a pair of parallel slide plate guide rails fixed on the upper plate surface of the compartment partition plate, an electromagnetic lock mounting plate fixed on the upper surface of the slide plate guide rails, an electromagnetic lock and a return spring which are arranged on the electromagnetic lock mounting plate, wherein one end of the return spring is connected with the interlocking slide plate, the other end of the return spring is connected with the electromagnetic lock mounting plate, an interlocking deflector rod is arranged on the lower plate surface of the interlocking slide plate, a long slide hole extending along the sliding direction of the interlocking slide plate and a telescopic avoidance hole of a lock rod of an electric power lock are arranged on the compartment partition plate, and the interlocking deflector rod downwards passes through the long slide hole and can slide along the long slide hole to drive the interlocking slide plate to move forwards and backwards. The utility model can avoid the occurrence of false locking or failure of the electromagnetic lock and can greatly reduce the risk of electric shock. The utility model has simple structure, reliable function and easy implementation, and is applicable to most of switch equipment and control equipment of the medium-high voltage grounding-free switch.

Inventors

XU JIE
LI ZHANGYUN
HE YUMIN
YAO LIN
WEI YANXIA
WANG LINQUAN
HUANG YUANZHAN
ZHENG YILONG

Assignees

广州白云电器设备股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250529

Claims (10)

1. The utility model provides a cabinet door interlock of reverse shutting in area which characterized in that: comprises a partition plate, a slidable interlocking slide plate arranged on the upper plate surface of the partition plate, a pair of parallel slide plate guide rails fixed on the upper plate surface of the partition plate and arranged on two sides of the interlocking slide plate, an electromagnetic lock mounting plate fixed on the upper surface of the slide plate guide rails, an electromagnetic lock with an early warning function and a return spring arranged on the electromagnetic lock mounting plate, wherein the electromagnetic lock mounting plate is positioned above the interlocking slide plate, one end of the return spring is connected with the interlocking slide plate, the other end is connected with the electromagnetic lock mounting plate, an interlocking deflector rod matched with the upper lock plate of a cable chamber door plate is arranged on the lower plate surface of the interlocking slide plate, the compartment partition plate is provided with a long sliding hole extending along the sliding direction of the interlocking sliding plate and an avoidance hole capable of stretching and retracting by the power supply locking rod, the interlocking deflector rod downwards passes through the long sliding hole and can slide along the long sliding hole to drive the interlocking sliding plate to move back and forth, when the cable chamber door is opened or not closed in place, the interlocking sliding plate slides to the limiting position of the sliding plate guide rail under the action of the reset spring to shield the avoidance hole, and when the cable chamber wire inlet and outlet sleeve is electrified, the electromagnetic lock cannot be locked and is in a reverse locking early warning state; when the cable chamber door is closed in place, the cable chamber door overcomes the tension of the reset spring to push the interlocking sliding plate to move backwards to expose the avoidance hole, when the cable chamber wire inlet and outlet sleeve is electrified, the electromagnetic lock rod extends out of the avoidance hole to prop against the lock plate and is in an electromagnetic lock locking state, the cable chamber door cannot be opened at the moment, and when the cable chamber wire inlet and outlet sleeve is not electrified, the electromagnetic lock rod retracts from the avoidance hole to be in an electromagnetic lock unlocking state, and the cable chamber door can be opened at the moment.
2. The cabinet door interlocking device with reverse locking according to claim 1, wherein the width between the pair of slide rails is larger than the width of the interlocking slide plate, the interlocking slide plate is restrained from moving linearly back and forth, the thickness of the slide rail is larger than the thickness of the interlocking slide plate, the electromagnetic lock mounting plate is an L-shaped plate, an electromagnetic lock is mounted on the vertical surface of the electromagnetic lock mounting plate, a horizontal surface is fixed on the slide rail, and a through hole which is matched with the lock rod is formed in the horizontal surface.
3. The cabinet door interlocking device with reverse locking according to claim 2 wherein the front end of the compartment partition is provided with a flange for positioning the slide rail and the electromagnetic lock mounting plate.
4. The cabinet door interlocking device with reverse locking according to claim 3, wherein wing parts are arranged on two sides of the rear part of the interlocking slide plate, and the wing parts can be clamped at the rear end of the slide plate guide rail to limit the forward travel of the interlocking slide plate.
5. The cabinet door interlocking device with reverse locking according to claim 4, wherein a positioning small hole is formed in the middle line position of the wing part of the interlocking slide plate, the lower plate surface of the interlocking slide plate and the interlocking deflector rod are integrally positioned and pressed through the positioning small hole, and an elongated opening is formed in the middle line position of the front part of the interlocking slide plate.
6. The cabinet door interlocking device with reverse locking according to claim 5, wherein a folded edge is arranged at the rear end of the interlocking sliding plate, a first hanging spring hole is formed in the folded edge, a folded edge is arranged at the rear end of the horizontal plane of the electromagnetic lock mounting plate, a second hanging spring hole is formed in the folded edge, and two ends of the reset spring are respectively connected to the first hanging spring hole and the second hanging spring hole.
7. The cabinet door interlocking device with reverse blocking according to claim 6, wherein the interlocking slide plate, the electromagnetic lock mounting plate, the electromagnetic lock, the return spring and the slide guide rail are all installed in a mechanism chamber which is independently arranged.
8. The cabinet door interlocking device with reverse locking according to claim 7 wherein the locking plate is a bent plate, the top surface of the bent plate is a contact surface propped against a locking rod of the electromagnetic lock, and the rear end surface of the bent plate is a pushing surface for pushing the interlocking shifting rod.
9. The cabinet door interlocking device with reverse locking according to claim 8, wherein the cable chamber door plate is slidably mounted on a pair of door plate guide rails separately arranged at the left side and the right side of the cable chamber door, the locking plate is fixed on the top surface of the door plate, hanging teeth are arranged on the back surface of the door plate, and hanging tooth holes for the hanging teeth to be clamped are formed in the door plate guide rails.
10. The cabinet door interlocking device with reverse locking according to claim 9, wherein the early warning function of the electromagnetic lock is triggered and sounds a buzzing early warning when the lock lever is in a non-locking position/unlocking position, and the manual reset interrupts buzzing early warning.

Description

Cabinet door interlocking device with reverse locking function Technical Field The utility model belongs to the technical field of five-prevention interlocking of metal-enclosed switchgear and control equipment in the power industry, and particularly relates to a cabinet door interlocking device with reverse locking, which is suitable for locking a cabinet door of a cable chamber door of a switchgear without a switch or with a two-station switch serving as a wire inlet functional unit. Background The five-prevention interlocking is an important safety design principle of high-voltage switch equipment (such as a high-voltage switch cabinet) in a power system, and aims to prevent personal injury and equipment damage caused by misoperation. The relevant standards of IEC 62271-200, GB 3906 and the like put clear demands on equipment interlocking, so that when the high-voltage switch equipment is designed, a circuit breaker mechanism and an isolating mechanism, a space switch operation and a grounding switch operation and a cable chamber door are all provided with perfect mechanical and electrical interlocking so as to prevent equipment damage or casualties caused by misoperation or mistaken entering a live gap. The cable chamber is used as a whole switch device, is very likely to touch a compartment of a high-voltage electrified body for causing personnel to get an electric shock, and the interlocking design of the compartment door is particularly important. The circuit breaker unit scheme, the load switch-fuse combined electrical appliance unit scheme and the bus PT cabinet scheme with the switch in the standard typical scheme are used for locking the cable chamber door through the grounding operation of an isolated grounding switch mechanism (usually a three-station mechanism), and stable, reliable and easy-to-realize interlocking is designed between the grounding switch and the cable chamber door. However, there are also functional unit schemes without a grounding switch, namely 1) a bus lifting cabinet unit without a switch, 2) a two-station disconnecting switch breaker unit (without a grounding switch, for preventing the live-wire from being connected with the grounding switch by mistake) as a wire inlet, and the locking design difficulty of the cable chamber door is great, and the prior embodiments mainly comprise that 1) a mechanical padlock is arranged on the cable chamber door, 2) a mechanical locking device with complicated mechanism chamber design, 3) an electromagnetic lock is arranged in the mechanism chamber, the cable chamber door is locked/unlocked unidirectionally by checking whether a wire inlet cable sleeve is electrified, 4) the electromagnetic lock is arranged on the cable chamber door and matched with a cabinet body frame, and the cable chamber door is locked/unlocked unidirectionally by checking whether the wire inlet cable sleeve is electrified. Although the above-described method plays a role in preventing erroneous entry into the charging gap to some extent, the following drawbacks are also present: 1) The complex mechanical locking device has the advantages of high installation difficulty, high matching requirement and difficult implementation. 2) By installing the electromagnetic lock, the cable chamber door is locked in one direction, and under the conditions that the cable sleeve of the access cable is electrified and the cable chamber door is not closed, the electromagnetic lock still extends out of the lock rod to finish 'false locking', so that an uncharged appearance can be easily given, and the electromagnetic lock is quite dangerous for operators and overhaulers; 3) And the electromagnetic lock is arranged on the cable room door, and when the cable room door is taken down and the wire inlet and outlet cable sleeve is electrified again, the electromagnetic lock is invalid no matter in a locking state or an unlocking state. Disclosure of utility model The utility model aims to provide the cabinet door interlocking device with the reverse locking, which is stable and reliable, has a simple structure, is easy to realize and can greatly reduce the risk of personnel electric shock. The cabinet door interlocking device with the reverse locking function is characterized by comprising a compartment partition plate, a slidable interlocking slide plate arranged on the upper plate surface of the compartment partition plate, a pair of parallel slide plate guide rails fixed on the upper plate surface of the compartment partition plate and arranged on two sides of the interlocking slide plate, an electromagnetic lock mounting plate fixed on the upper surface of the slide plate guide rails, an electromagnetic lock with an early warning function and a return spring, wherein the electromagnetic lock mounting plate is positioned above the interlocking slide plate, one end of the return spring is connected with the interlocking slide plate, the other end of the return spring is connected with th