CN112349529A - Misoperation prevention interlocking device for drawer unit of low-voltage cabinet electric-operated switch - Google Patents
Misoperation prevention interlocking device for drawer unit of low-voltage cabinet electric-operated switch Download PDFInfo
- Publication number
- CN112349529A CN112349529A CN202011039282.8A CN202011039282A CN112349529A CN 112349529 A CN112349529 A CN 112349529A CN 202011039282 A CN202011039282 A CN 202011039282A CN 112349529 A CN112349529 A CN 112349529A
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- CN
- China
- Prior art keywords
- drawer
- push rod
- electromagnetic lock
- interlocking mechanism
- switch
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
-
- 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
- H02B11/127—Withdrawal mechanism
- H02B11/133—Withdrawal mechanism with interlock
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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
- H02B11/173—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal drawer type
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Drawers Of Furniture (AREA)
Abstract
The invention provides a misoperation prevention interlocking device for a low-voltage cabinet electric operating switch drawer unit and the low-voltage cabinet electric operating switch drawer unit, wherein the misoperation prevention interlocking device comprises an interlocking mechanism and a locking circuit which are arranged on the drawer unit; the locking circuit comprises an electromagnetic lock, an electric operating mechanism and a plastic shell switch with a closing auxiliary contact, the electromagnetic lock comprises a lock cylinder, the plastic shell switch is electrically connected with the electromagnetic lock, and the electromagnetic lock can be powered on or powered off through opening and closing of the closing auxiliary contact, so that the lock cylinder of the electromagnetic lock is extended or retracted; the electric operating mechanism is electrically connected with the plastic shell switch; the interlocking mechanism comprises a mechanical unlocking button, an unlocking push rod, an interlocking mechanism guard plate, a reset spring, a transmission gear, a gear rigid connecting shaft, a drawer locking bolt and a limiting structure. Through the interlocking mechanism and the locking circuit, the low-voltage cabinet electric-operated switch drawer realizes reliable misoperation prevention interlocking, is prevented from being drawn out or inserted when the drawer is loaded, and guarantees personal safety and operation reliability.
Description
Technical Field
The invention relates to an interlocking device for preventing misoperation of a drawer unit of an electric-operated switch of a low-voltage cabinet, belonging to the technical field of low-voltage draw-out switch cabinets.
Background
In a standard low-voltage power distribution system, a drawer cabinet is generally applied due to high reliability, convenience in maintenance, attractiveness and tidiness. Meanwhile, with the popularization of intelligent power distribution technology, unattended technology and the like, more and more low-voltage plastic shell switches are installed with electric operation mechanisms to realize remote/local control. The prior drawer type plastic shell switch generally adopts a manual operation handle to realize mechanical locking, and when the breaker is in a disconnection state, the drawer can be pulled out for overhauling and checking.
The structure of the electrically operated plastic shell switch is different from that of a non-electrically operated plastic shell switch, an electrically operated mechanism is required to be installed on the front face of the switch, and a traditional manual operation handle cannot be installed, so that the interlocking function is lost, misoperation is easily caused, a drawer is moved with load, and the occurrence of events such as electrical faults, damage to an electrical system, injury to people and the like is caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing an interlocking device for preventing misoperation of a drawer unit of an electric-operated switch of a low-voltage cabinet, which is used for solving the problem that the interlocking protection cannot be realized by arranging a manual operation handle when the electric-operated plastic shell switch is installed in a drawer.
Compared with the prior art, the device adopts a simple interlocking device matched with electricity and machinery, ensures that the drawer can be drawn out only when the main breaker is in the opening state, reduces complex mechanisms, and improves the safety and reliability of the drawer cabinet.
According to one aspect of the invention, the invention provides a misoperation prevention interlocking device for a drawer unit of an electric operation switch of a low-voltage cabinet, which is characterized by comprising an interlocking mechanism and a locking circuit, wherein the interlocking mechanism is installed on the drawer unit;
the locking circuit comprises an electromagnetic lock (1), an electric operating mechanism (21) and a plastic shell switch (11) with a closing auxiliary contact, the electromagnetic lock (1) comprises a lock cylinder (10), the plastic shell switch (11) is electrically connected with the electromagnetic lock (1), and the electromagnetic lock can be powered on or powered off through opening and closing of the closing auxiliary contact, so that the lock cylinder (10) of the electromagnetic lock is extended or retracted; the electric operating mechanism (21) is electrically connected with the plastic shell switch (11);
the interlocking mechanism comprises a mechanical unlocking button (2), an unlocking push rod (3), an interlocking mechanism guard plate (4), a reset spring (5), a transmission gear (6), a gear rigid connecting shaft (7), a drawer locking bolt (8) and a limiting structure (9); the mechanical unlocking button (2) is connected to one end of the unlocking push rod (3), a gear meshed with the transmission gear (6) is arranged at the other end of the unlocking push rod (3), a through hole is formed in the middle of the unlocking push rod (3), and the electromagnetic lock cylinder 10 can penetrate into the through hole when extending out, so that the unlocking push rod (3) is prevented from moving; the reset spring (5) is arranged between the interlocking mechanism guard plate (4) and the unlocking push rod (3) and is used for resetting the unlocking push rod (3); the transmission gear (6) is in meshed connection with the drawer locking bolt (8) and can drive the drawer locking bolt (8) to enter or move out of the limiting structure (9).
Preferably, the limiting structure (9) is a limiting lock catch or a limiting hole.
Preferably, the locking circuit further comprises a locking indicator light (12) connected in parallel with the electromagnetic lock (1).
Preferably, the lockout circuit further comprises a fuse.
Preferably, the transmission gear (6) comprises an upper gear, a lower gear and a rigid connecting shaft for connecting the upper gear and the lower gear; the upper gear is meshed with one end of the unlocking push rod; the lower gear is engaged with the drawer locking bolt (8).
Preferably, the locking circuit further comprises a power supply, and the power supply is a secondary control power supply accessed through a secondary plug connector.
Preferably, the drawer locking bolt (8) comprises two sub-drawer locking bolts, one end of each of which is engaged with the transmission gear (6), and the other end of each of which extends to both sides of the drawer unit.
Preferably, a spring fixing protrusion is formed on the unlocking push rod (3), one end of the return spring (5) abuts against the interlocking mechanism guard plate (4), and the other end abuts against the spring fixing protrusion, thereby being fixedly arranged between the unlocking push rod (3) and the interlocking mechanism guard plate (4).
According to another aspect of the invention, an electric switch drawer unit of a low-voltage cabinet is further provided, and the electric switch drawer unit comprises the misoperation prevention interlocking device.
Compared with the prior art, the invention has the beneficial effects that:
the interlocking device for preventing misoperation comprises an interlocking mechanism and a locking circuit, wherein a closing auxiliary contact of a plastic shell switch and an electromagnetic lock are connected in series in the locking circuit, when the plastic shell switch in a drawer is in a closing state, the closing auxiliary contact of the switch is closed, the locking circuit is conducted, the electromagnetic lock is powered, at the moment, a lock cylinder of the electromagnetic lock extends out, an unlocking push rod of the interlocking mechanism is locked and cannot be pushed, a drawer locking bolt is ensured to extend out of the drawer and is blocked by a limiting lock catch, the drawer is kept in a locking state, the drawer cannot be drawn out or inserted, and a locking indicator lamp is powered on to emit light to prompt that the drawer is in the locking state; when a plastic shell switch in the drawer is in a switching-off state, a switching-on auxiliary contact of the switch is opened, a locking circuit is disconnected, the electromagnetic lock loses power, the electromagnetic lock cylinder is withdrawn, an unlocking push rod of the interlocking mechanism releases locking, the drawer locking bolt can be withdrawn into the drawer by pushing the unlocking rod, the drawer is prevented from being blocked by the limiting lock catch, and the drawer can be normally drawn out or inserted into the low-voltage cabinet when the locking state is released. Through the interlocking mechanism and the locking circuit, the low-voltage cabinet electric-operated switch drawer realizes reliable misoperation prevention interlocking, is prevented from being drawn out or inserted when the drawer is loaded, and guarantees personal safety and operation reliability. The circuit of the invention has simple structure, practicability and reasonability, has wide application range, and meets the requirements of safe and reliable operation and cost saving.
Drawings
FIG. 1 is a partial schematic view of a malfunction prevention interlock device according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a low voltage cabinet electrically operated switch drawer unit including a mis-operation prevention interlock according to an embodiment of the present invention;
FIG. 3 is a schematic view of a partial structure of a malfunction prevention interlock device according to an embodiment of the present invention from the bottom;
FIG. 4 is a side schematic view of a low voltage cabinet electrically operated switch drawer unit including a mis-operation prevention interlock according to an embodiment of the present invention;
FIG. 5 is a side view schematic of a low voltage cabinet electrically operated switch drawer unit including a mis-operation prevention interlock in accordance with an embodiment of the present invention as the drawer is withdrawn;
FIG. 6 is an enlarged view of a portion of FIG. 5;
fig. 7 is a schematic diagram of a circuit according to an embodiment of the present invention.
Detailed Description
The invention will be better understood from the following examples. However, those skilled in the art will readily appreciate that the description of the embodiments is only for illustrating the present invention and should not be taken as limiting the invention as detailed in the claims.
As shown in fig. 1 to 6, the interlock device for preventing erroneous operation according to the present invention may include an interlock mechanism and a latch circuit.
The interlock mechanism and the latch circuit are provided on the drawer unit. The drawer unit may include a drawer 13, rollers 18, rails 19, and drawer unit deck 20; the drawer 13 is enclosed by a front panel 14, a rear panel 15, a left side panel 16, a right side panel 16 and a bottom panel 17; the bottom parts of two sides of the drawer 13 are provided with rollers 18, and the drawer 13 is connected to a guide rail 19 and a drawer unit layer plate 20 in a sliding way through the rollers 18 (the rollers slide on the guide rail); the guide rails 19 are fixedly mounted on the drawer unit floor 20.
The interlocking mechanism comprises a mechanical unlocking button 2, an unlocking push rod 3, an interlocking mechanism guard plate 4, a return spring 5, a transmission gear 6, a drawer locking bolt 8 and a limiting structure 9.
Wherein, the unlocking push rod 3 is provided with a through hole, and the electromagnetic lock core 10 (see the following description) can pass through the through hole to lock the unlocking push rod 3. One end of the unlocking push rod 3 is fixedly connected with the mechanical unlocking button 2, and the front part of the other end of the unlocking push rod 3 is of a rack structure and is meshed with the transmission gear 6; the mechanical unlocking button 2 is fixedly arranged on the drawer front panel 14; the interlocking mechanism guard plate 4 is fixedly arranged on the drawer bottom plate 17, a through hole for the unlocking push rod 3 to pass through can be reserved on one side of the interlocking mechanism guard plate 4, or the movement of the unlocking push rod 3 is not hindered by the side of the interlocking mechanism guard plate 4; a return spring 5 is arranged between the unlocking plunger 3 and the interlocking mechanism guard 4, for example, a protrusion for fixing a spring may be arranged on the unlocking plunger 3 to fix one end of the return spring 5, and the other end of the return spring 5 is fixed to the interlocking mechanism guard 4. The transmission gear 6 can be composed of an upper gear, a lower gear and a gear rigid connecting shaft 7; the upper gear is arranged on the drawer bottom plate 17 and is meshed with one end of the unlocking push rod 3; the lower gear is arranged below the drawer bottom plate 17 and is meshed with the drawer locking bolt 8, for example, the drawer locking bolt 8 can be arranged to comprise two sub-drawer locking bolts, one end of each sub-drawer locking bolt is provided with a gear which is respectively meshed with the transmission gear 6, and the other end of each sub-drawer locking bolt extends to the two sides of the drawer in opposite directions; the upper gear and the lower gear are connected by a gear rigid connecting shaft 7, and when the unlocking push rod 3 pushes the transmission gear 6 to rotate, the drawer locking bolt 8 can be reliably interlocked to act. The drawer locking bolt 8 can be installed below the drawer bottom plate 17, the limiting lock catch 9 is fixed on the drawer unit laminate 20, the limiting lock catch 9 can be in a shape of a Chinese character kou, a lock hole for inserting the drawer locking bolt 8 is formed in one side of the limiting lock catch 9, a through hole for allowing the drawer locking bolt 8 to penetrate through is formed in the drawer guide rail 19, and when the transmission gear 6 drives the drawer locking bolt 8 to move into the through hole, the movement of the drawer 13 can be limited.
Referring to fig. 1-7, the latching circuit may include a power source, an electromagnetic lock 1, a molded case switch 11 with a closing auxiliary contact, a locking indicator light 12, a fuse FA, and an electric operator 21. The electromagnetic lock 1 is fixedly arranged on a drawer bottom plate 17 and comprises an extensible electromagnetic lock cylinder 10; the plastic shell switch 11 with the closing auxiliary contact and the electric operating mechanism 21 are both fixedly installed on the drawer bottom plate 17, and the locking indicator light 12 is arranged on the front panel 14.
As shown in fig. 7, the latch circuit may further include a power source, which may be an ac power source or a dc power source; a closing auxiliary contact OF and an electromagnetic lock 1(EL) which are configured in a plastic case switch 11(QF) in a set are connected in series into a locking circuit, and a locking indicator lamp 12(PG) and the electromagnetic lock EL are connected in parallel; the opening and closing state OF the auxiliary closing contact OF is determined by the plastic shell switch QF, when the plastic shell switch QF is in the closing state, the auxiliary closing contact OF is closed, and when the plastic shell switch QF is in the opening state, the auxiliary closing contact OF is opened. The locking indicator light PG is arranged on the front panel of the drawer; the latch circuit may be provided with a fuse FA for protection.
As shown in fig. 1 to 6, the mechanical unlocking button 2 is disposed outside the drawer front panel 14, and the drawer front panel 14 is further provided with a symmetrical handle 22, which is convenient for a user to unlock, insert and pull out the drawer 13 (relative to the guide rail 19). When a plastic shell switch 11 in a drawer 13 is in a closing state, a closing auxiliary contact OF OF the switch is closed, a locking circuit is conducted, power is supplied to an electromagnetic lock 1, a lock cylinder 10 OF the electromagnetic lock extends out, an unlocking push rod 3 OF an interlocking mechanism is locked and cannot be pushed, a drawer locking bolt 8 is ensured to extend out OF the drawer and is blocked by a limiting lock catch 9, the drawer 13 keeps in a locking state, the drawer 13 cannot be pulled out or inserted, and a locking indicator lamp 12 is also electrified to emit light at the moment, so that the drawer 13 is prompted to be in the locking state; when the plastic shell switch 11 in the drawer 13 is in an open state, the closing auxiliary contact OF OF the switch is opened, the locking circuit is disconnected, and the electromagnetic lock 1 loses power. At the moment, the electromagnetic lock cylinder 10 is retracted, the unlocking push rod 3 of the interlocking mechanism is unlocked, the mechanical unlocking button can be pressed through external force to push the unlocking push rod 3, the transmission gear 6 is driven to rotate, the drawer locking bolt 8 is further driven to retract into the drawer 13, the situation that the drawer is blocked by the limiting lock catch 9 is avoided, the drawer 13 is unlocked, and the drawer can be normally drawn out or inserted. When the external force is removed, the reset spring can reset the unlocking push rod 3 through elastic force. Through the interlocking mechanism and the locking circuit, the drawer 13 of the low-voltage cabinet electric-operated switch realizes reliable misoperation prevention interlocking, the drawer 13 is prevented from being drawn out or inserted when loaded, and the personal safety and the operation reliability are ensured.
As shown in fig. 7, the power supply of the locking circuit can be connected by the secondary control power supply of the drawer unit, and the circuit is connected to the secondary control power supply by using a secondary connector JX, so as to ensure that the locking circuit is powered on before the main circuit of the plastic casing switch QF when the drawer is inserted from outside to inside. If the plastic shell switch QF is in a closing state, the locking circuit is powered on before the main circuit, the drawer locking bolt is locked in advance, the drawer cannot be inserted, and the dangerous condition that the plastic shell switch is closed and inserted into the drawer is avoided.
The specific embodiments are given above, but the present invention is not limited to the above-described embodiments. The basic idea of the present invention lies in the above basic scheme, and it is obvious to those skilled in the art that no creative effort is needed to design various modified models, formulas and parameters according to the teaching of the present invention. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (9)
1. The misoperation preventing interlocking device for the low-voltage cabinet electrically operated switch drawer unit is characterized by comprising an interlocking mechanism and a locking circuit, wherein the interlocking mechanism is arranged on the drawer unit;
the locking circuit comprises an electromagnetic lock (1), an electric operating mechanism (21) and a plastic shell switch (11) with a closing auxiliary contact, the electromagnetic lock (1) comprises a lock cylinder (10), the plastic shell switch (11) is electrically connected with the electromagnetic lock (1), and the electromagnetic lock can be powered on or powered off through opening and closing of the closing auxiliary contact, so that the lock cylinder (10) of the electromagnetic lock is extended or retracted; the electric operating mechanism (21) is electrically connected with the plastic shell switch (11);
the interlocking mechanism comprises a mechanical unlocking button (2), an unlocking push rod (3), an interlocking mechanism guard plate (4), a reset spring (5), a transmission gear (6), a gear rigid connecting shaft (7), a drawer locking bolt (8) and a limiting structure (9); the mechanical unlocking button (2) is connected to one end of the unlocking push rod (3), a gear meshed with the transmission gear (6) is arranged at the other end of the unlocking push rod (3), a through hole is formed in the middle of the unlocking push rod (3), and the electromagnetic lock cylinder (10) can penetrate into the through hole when extending out, so that the unlocking push rod (3) is prevented from moving; the reset spring (5) is arranged between the interlocking mechanism guard plate (4) and the unlocking push rod (3) and is used for resetting the unlocking push rod (3); the transmission gear (6) is in meshed connection with the drawer locking bolt (8) and can drive the drawer locking bolt (8) to enter or move out of the limiting structure (9).
2. The misoperation prevention interlock according to claim 1, wherein: the limiting structure (9) is a limiting lock catch or a limiting hole.
3. The misoperation prevention interlock according to claim 1, wherein: the locking circuit further comprises a locking indicator light (12) connected in parallel with the electromagnetic lock (1).
4. The misoperation prevention interlock according to claim 1, wherein: the lockout circuit also includes a fuse.
5. The misoperation prevention interlock according to claim 1, wherein: the transmission gear (6) comprises an upper gear, a lower gear and a rigid connecting shaft for connecting the upper gear and the lower gear; the upper gear is meshed with one end of the unlocking push rod; the lower gear is engaged with the drawer locking bolt (8).
6. The misoperation prevention interlock according to claim 1, wherein: the locking circuit further comprises a power supply, and the power supply is a secondary control power supply accessed through a secondary plug connector.
7. The misoperation prevention interlock according to claim 1, wherein: the drawer locking bolt (8) comprises two sub-drawer locking bolts, one end of each sub-drawer locking bolt is meshed with the transmission gear (6), and the other end of each sub-drawer locking bolt extends to two sides of the drawer unit.
8. The misoperation prevention interlock according to claim 1, wherein: a spring fixing protrusion is formed on the unlocking push rod (3), one end of the reset spring (5) abuts against the interlocking mechanism guard plate (4), and the other end of the reset spring abuts against the spring fixing protrusion, so that the reset spring is fixedly arranged between the unlocking push rod (3) and the interlocking mechanism guard plate (4).
9. An electrically operated switch drawer unit for a low-voltage cabinet, comprising a mis-operation prevention interlock according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039282.8A CN112349529A (en) | 2020-09-28 | 2020-09-28 | Misoperation prevention interlocking device for drawer unit of low-voltage cabinet electric-operated switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039282.8A CN112349529A (en) | 2020-09-28 | 2020-09-28 | Misoperation prevention interlocking device for drawer unit of low-voltage cabinet electric-operated switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112349529A true CN112349529A (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011039282.8A Pending CN112349529A (en) | 2020-09-28 | 2020-09-28 | Misoperation prevention interlocking device for drawer unit of low-voltage cabinet electric-operated switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112349529A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114172064A (en) * | 2021-12-09 | 2022-03-11 | 山东泰开真空开关有限公司 | Anti-misoperation draw-out type low-voltage complete equipment |
| EP4064478A1 (en) * | 2021-03-26 | 2022-09-28 | Schneider Electric Industries SAS | Control drawer for electrical connection cabinet and electrical connection cabinet comprising such a control drawer |
-
2020
- 2020-09-28 CN CN202011039282.8A patent/CN112349529A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4064478A1 (en) * | 2021-03-26 | 2022-09-28 | Schneider Electric Industries SAS | Control drawer for electrical connection cabinet and electrical connection cabinet comprising such a control drawer |
| WO2022200583A1 (en) * | 2021-03-26 | 2022-09-29 | Schneider Electric Industries Sas | Instrumentation and control drawer for a switchgear cabinet and switchgear cabinet comprising such an instrumentation and control drawer |
| US20220312616A1 (en) * | 2021-03-26 | 2022-09-29 | Schneider Electric Industries Sas | Monitoring/control plug-in unit for a connection electrical enclosure and connection electrical enclosure comprising such a monitoring/control plug-in unit |
| FR3121313A1 (en) * | 2021-03-26 | 2022-09-30 | Schneider Electric Industries Sas | Control-command drawer for electrical connection cabinet and electrical connection cabinet comprising such a control-command drawer |
| US11974409B2 (en) * | 2021-03-26 | 2024-04-30 | Schneider Electric Industries Sas | Monitoring-and-control drawer for an electrical connection enclosure |
| CN114172064A (en) * | 2021-12-09 | 2022-03-11 | 山东泰开真空开关有限公司 | Anti-misoperation draw-out type low-voltage complete equipment |
| CN114172064B (en) * | 2021-12-09 | 2022-11-29 | 山东泰开真空开关有限公司 | Anti-misoperation draw-out type low-voltage complete equipment |
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