CN111312538A - Ring main unit cable chamber door interlock - Google Patents
Ring main unit cable chamber door interlock Download PDFInfo
- Publication number
- CN111312538A CN111312538A CN202010004340.7A CN202010004340A CN111312538A CN 111312538 A CN111312538 A CN 111312538A CN 202010004340 A CN202010004340 A CN 202010004340A CN 111312538 A CN111312538 A CN 111312538A
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- CN
- China
- Prior art keywords
- chamber door
- cable chamber
- cam
- main unit
- ring main
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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
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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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
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
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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
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Patch Boards (AREA)
Abstract
The invention discloses a cable chamber door interlock of a ring main unit, which comprises a cam, a connecting piece and a locking device, wherein the cam is an eccentric wheel, the center of the cam is provided with a grounding operating shaft, and the cam can be rotated through the operating shaft; one end of the connecting piece is abutted against the cam, and the other end of the connecting piece is connected with the locking device; the locking device is arranged between the cable chamber door and the middle cross beam and comprises a buckle, a spring and a locking plate which are arranged at the tail end of the connecting piece. The invention has the functions of electric locking and mechanical locking, and the grounding operation and the electric operation can not be carried out simultaneously, thereby improving the safety of the ring main unit; the invention overcomes the defect of flexible interlocking, has simple and convenient assembly, easy debugging and low failure rate.
Description
Technical Field
The invention relates to a cable chamber door interlock of a ring main unit.
Background
The ring main unit should have reliable "five prevention" function: the circuit breaker is prevented from being wrongly opened and closed; prevent the load from opening and closing the isolating switch (plug); preventing the live-engaging ground switch; preventing power transmission with a grounding switch; preventing erroneous entry into the live interval. Therefore, the interlocking device is applied to the ring main unit, and the five-prevention requirement can be met. The interlocking device is a mechanical connecting mechanism which is arranged among a plurality of switching electric appliances or components and is designed for ensuring the switching electric appliances or the components thereof to act according to a specified sequence or preventing misoperation.
Commonly used interlock guards may be mechanical or electrical interlocks. The electric interlocking is as follows: when the cable chamber door is opened, all the electric control loops are cut off; the cable chamber door returns to the electrical control loop when closed. The mechanical interlocking is as follows: when the cable chamber door is opened, the grounding switch cannot be operated; the grounding switch and electrical interlock may be operated when the cable chamber door is closed. The existing ring main unit cannot have the functions of electric locking and mechanical locking at the same time. Meanwhile, the existing interlocking mechanism of the ring main unit adopts flexible interlocking of flexible connection or stay wire ropes, and the flexible interlocking has the problems of complex assembly, difficult debugging, high failure rate and the like.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a cable chamber door interlocking device of a ring main unit, which has high structural strength, high efficiency and stability.
The technical scheme is as follows: the cable chamber door interlock of the ring main unit comprises a cam, a connecting piece and a locking device, wherein the cam is an eccentric wheel, a grounding operation shaft is arranged in the center of the cam, and the cam can be rotated through the operation shaft; one end of the connecting piece abuts against the cam, and the other end of the connecting piece is connected with the locking device; the locking device is arranged between the cable chamber door and the middle cross beam and comprises a buckle, a spring and a locking plate which are arranged at the tail end of the connecting piece; the top of the buckle is an inclined edge facing to one side of the locking plate, the top of the buckle is inserted into a through hole of the cable chamber door, one end of the spring is connected with the connecting piece, the other end of the spring is connected with the locking plate, and when the cable chamber door is locked by the locking device, the spring is in a stretching state; the locking plate is fixed on the upper part of the middle cross beam, one side of the locking plate is provided with a special-shaped groove, and the side corresponding to the connecting buckle is in a shape capable of being clamped with the special-shaped groove; the top edge of the locking plate is provided with a boss which is wider than the thickness of the locking plate; the locking plate is movably connected with the buckle.
And a travel switch is also arranged on the middle cross beam and is contacted with the locking plate when the cable chamber door is locked by the locking device.
The locking plate comprises a transverse arm and a vertical arm, a through hole is formed in the middle cross beam, the transverse arm is fixed to the middle cross beam, and the vertical arm penetrates through the through hole in the middle cross beam; when the cable chamber door is closed, the inner side of the cable chamber door is abutted against the vertical arm.
When the grounding switch is in an opening state, one end of the cam far away from the shaft faces downwards; when the grounding switch is in a closing state, the cam rotates 90 degrees along the grounding shaft anticlockwise.
The upper part of the connecting piece is provided with a supporting plate, and the supporting plate consists of a connecting part, a bending part and a vertical part; under the brake-off state of the grounding switch, the bending part abuts against one end of the cam far away from the shaft; and under the closing state of the grounding switch, the bending part abuts against the side edge of the cam.
A certain gap is formed between the vertical part and the cam, a groove is formed in the top edge of the vertical part, and the shape of the groove corresponds to the shape of the cross section of the grounding operation shaft.
The buckle is also provided with a waist-shaped hole or a chute, the locking plate is provided with a fixed block, and the fixed block is arranged in the waist-shaped hole or the chute and can slide in the hole.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the ring main unit has the functions of electrical locking and mechanical locking, and the grounding operation and the electrical operation cannot be performed simultaneously, so that the safety of the ring main unit is improved; the invention overcomes the defect of flexible interlocking, has simple and convenient assembly, easy debugging and low failure rate.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic view of the locking device of the present invention;
FIG. 4 is a schematic view of the cam configuration of the cable compartment door of the present invention after opening;
FIG. 5 is a schematic view of the locking device of the invention after the cable compartment door is opened.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in figure 1, the invention comprises a cam 2, a connecting piece 5 and a mounting plate 3, wherein the tail end of the connecting piece 5 is provided with a supporting plate 4, the center of the cam 2 is provided with a grounding operation hole, and a grounding operation shaft 1 is connected in the hole. The operation shaft is arranged on the upper cabinet door, the ring main unit upper cabinet door and the lower cabinet door (namely the cable chamber door) are connected through the ring main unit, and a middle cross beam 7 is arranged between the upper cabinet door and the cable chamber door. One side of the mounting plate 3 is connected with a connecting piece 5, and the other side is fixedly mounted on a mechanism in the upper cabinet door in an interlocking manner.
The cam 2 is an eccentric wheel and can be rotated by a central grounding operation shaft 1. The grounding operation shaft 1 is used for operating the opening and closing of the grounding switch, and when the grounding switch is in an opening (namely, disconnecting) state, one end of the cam far away from the shaft faces downwards; when the grounding switch is in a closed (i.e., closed) state, the cam rotates 90 counterclockwise along the grounding axis.
As shown in fig. 2, the pallet 4 is composed of a connecting portion 43, a bent portion 42, and a vertical portion 41. Under the state that the grounding switch is switched off, the bending part is abutted against one end of the cam far away from the shaft. In the closed state of the grounding switch, the bent portion abuts against the side edge of the cam, as shown in fig. 4. One end of the connecting piece 5 is further provided with a locking device 8, which is provided between the cable compartment door 11 and the middle rail 7 for locking the cable compartment door. A certain clearance is reserved between the vertical part 41 and the cam 2, and the top edge of the vertical part 41 is provided with a groove, and the shape of the groove corresponds to the shape of the section of the grounding operation shaft.
As shown in fig. 3, the locking device 6 comprises a catch 12 provided at the end of the connecting piece, a locking tab 8, a spring 9 and a travel switch 15 provided on the cross member. The top of the buckle 12 facing to one side of the locking plate is a bevel edge, and the top of the buckle can be triangular or trapezoidal. The top of the catch 12 is inserted into a through hole 14 of the cable chamber door 11, and the width of the through hole is identical to the width of the top of the catch 12. The buckle 12 is further provided with a waist-shaped hole (or a chute) 13, the locking plate 8 is provided with a fixing block 10, and the fixing block 10 is arranged in the waist-shaped hole 13 and can slide in the hole to drive the buckle to move relative to the locking plate. Locking plate 8 is fixed in on the middle cross beam, including xarm 81 and perpendicular arm 82, is equipped with the perforation on the middle cross beam, and perpendicular arm 82 passes the perforation on the middle cross beam, and when the cable chamber door was closed, cable chamber door 11 inboard supported and leaned on perpendicular arm 82, and locking plate and travel switch 15 contact, the switch switches on, changes and can carry out electrical operation after the switch switches on. The locking plate 8 one side has heterotypic groove 80, corresponds buckle 12 one side and is the shape that can block with this heterotypic groove, when making the terminal perforation 14 that inserts on the cable chamber door of buckle, buckle and locking plate closely laminate. One end of the spring 9 is connected with the buckle 12, and the other end is connected with the locking plate 8, and when the cable chamber door is closed, the spring 9 is in a stretching state. The top edge of the locking tab 8 is also provided with a boss 83 which protrudes towards one or both sides of the locking tab and has a width greater than the thickness of the locking tab.
Under the state that the grounding switch is switched on, when the cable chamber door 11 is opened, the bevel edge of the buckle is pushed to move upwards along the through hole 14 by the outward force in the horizontal direction, the buckle drives the connecting piece 5 to move upwards under the combined action of the restoring force of the spring 9, the concave part of the special-shaped groove on the side edge of the buckle is clamped on the boss 83 of the locking plate, and the locking device is fixed, as shown in fig. 5. At this time, one side of the locking plate 8 is far away from the travel switch 15, and the switch is in a normally open state, so that the electric operation cannot be carried out. The vertical portion 41 of the blade moves upward to block the ground operation hole, and the ground operation cannot be performed, as shown in fig. 4.
Earthing switch is when the separating brake state, because layer board 4 can support and lean on cam 2, whole interlocking device is in the locking state, and cable chamber door can't be opened, and travel switch 15 is closed with the locking plate, switches on the circuit, therefore the operating personnel can carry out electrical operation. When earthing switch is under the combined floodgate state, cable chamber door just can open, and the back is opened to the door, travel switch 15 and locking plate disconnection, and electrical operation can't go on, and earthing operation also can't go on simultaneously. Therefore, the invention has the functions of electrical interlocking and mechanical interlocking, adopts rigid connection, is simple and convenient to operate, assemble and disassemble and is easy to debug.
Claims (8)
1. The cable chamber door interlocking of the ring main unit is characterized by comprising a cam (2), a connecting piece (5) and a locking device (6), wherein the cam is an eccentric wheel, a grounding operating shaft (1) is arranged in the center of the cam, and the cam can be rotated through the operating shaft; one end of the connecting piece (5) abuts against the cam (2), and the other end of the connecting piece is connected with the locking device (6); the locking device (6) is arranged between the cable chamber door (11) and the middle cross beam (7) and comprises a buckle (12) arranged at the tail end of the connecting piece, a spring (9) and a locking plate (8); the top of the buckle (12) is inclined towards one side of the locking plate (8), the top of the buckle is inserted into a through hole (14) of the cable chamber door, one end of the spring is connected with the buckle (12), the other end of the spring is connected with the locking plate (8), and when the cable chamber door is locked by the locking device, the spring (9) is in a stretching state; the locking plate (8) is fixed on the upper part of the middle cross beam (7), one side of the locking plate (8) is provided with a special-shaped groove (80), and one side corresponding to the connecting buckle is in a shape capable of being clamped with the special-shaped groove; the top edge of the locking plate (8) is provided with a boss (83), and the boss is wider than the thickness of the locking plate; the locking plate (8) is movably connected with the buckle (12).
2. The ring main unit cable chamber door interlock according to claim 1, wherein the middle cross beam (7) is further provided with a travel switch (15) which contacts with the locking piece (8) when the cable chamber door is locked by the locking device.
3. The ring main unit cable chamber door interlock as claimed in claim 1, wherein the locking plate comprises a cross arm (81) and a vertical arm (82), the middle cross beam is provided with a through hole, the cross arm (81) is fixed on the middle cross beam (7), and the vertical arm (82) passes through the through hole on the middle cross beam; when the cable chamber door is closed, the inner side of the cable chamber door (11) abuts against the vertical arm.
4. The ring main unit cable chamber door interlock as claimed in claim 1, wherein the top of the buckle (12) is triangular.
5. The ring main unit cable chamber door interlock as claimed in claim 1, wherein when the earthing switch is in the open state, the end of the cam (2) away from the shaft faces downward; when the grounding switch is in a closing state, the cam rotates 90 degrees along the grounding operation shaft (1) anticlockwise.
6. The ring main unit cable chamber door interlock according to claim 5, wherein a support plate (4) is arranged at the upper part of the connecting piece (5), and the support plate is composed of a connecting part (43), a bending part (42) and a vertical part (41); under the opening state of the grounding switch, the bending part (42) is abutted against one end of the cam far away from the shaft.
7. The ring main unit cable chamber door interlock according to claim 6, wherein a gap is provided between the vertical portion (41) and the cam (2), and the top edge of the vertical portion is provided with a groove, and the shape of the groove corresponds to the cross-sectional shape of the grounding operation shaft (1).
8. The ring main unit cable chamber door interlock according to claim 1, wherein the buckle (12) is further provided with a kidney-shaped hole or a sliding groove (13), and the locking plate (8) is provided with a fixing block (10) which is arranged in the kidney-shaped hole or the sliding groove (13) and can slide in the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004340.7A CN111312538B (en) | 2020-01-03 | 2020-01-03 | Ring main unit cable chamber door interlock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004340.7A CN111312538B (en) | 2020-01-03 | 2020-01-03 | Ring main unit cable chamber door interlock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111312538A true CN111312538A (en) | 2020-06-19 |
| CN111312538B CN111312538B (en) | 2022-07-19 |
Family
ID=71146796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010004340.7A Active CN111312538B (en) | 2020-01-03 | 2020-01-03 | Ring main unit cable chamber door interlock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111312538B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533992A (en) * | 2009-02-24 | 2009-09-16 | 上海大华电器设备有限公司 | Interlocking device of metal-enclosed switchgear grounding switch and cable room door |
| CN203351459U (en) * | 2013-07-23 | 2013-12-18 | 北京合纵科技股份有限公司 | Interlocking device between load switch operating mechanism and switch cabinet lower gate |
| CN204144094U (en) * | 2014-09-09 | 2015-02-04 | 扬州新概念电气有限公司 | A kind of lower door interlocking mechanism of switch cubicle |
| CN207149444U (en) * | 2017-06-26 | 2018-03-27 | 董佃平 | A kind of inflating switch cabinet interlock assembly |
| CN207319958U (en) * | 2017-10-29 | 2018-05-04 | 默飓电气有限公司 | It is a kind of to prevent from the interlocking mechanism do not opened the door during ground state |
| CN207852527U (en) * | 2018-02-09 | 2018-09-11 | 上海启腾电气股份有限公司 | A kind of lower door interlock for gas-filling cabinet |
| US10460888B1 (en) * | 2018-08-14 | 2019-10-29 | Ron Zeitler | Defeater assembly |
| CN210223885U (en) * | 2019-09-18 | 2020-03-31 | 吉林省金冠电气股份有限公司 | Fuse bin and cable chamber door interlock for SF6 insulation combined electrical appliance cabinet |
-
2020
- 2020-01-03 CN CN202010004340.7A patent/CN111312538B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533992A (en) * | 2009-02-24 | 2009-09-16 | 上海大华电器设备有限公司 | Interlocking device of metal-enclosed switchgear grounding switch and cable room door |
| CN203351459U (en) * | 2013-07-23 | 2013-12-18 | 北京合纵科技股份有限公司 | Interlocking device between load switch operating mechanism and switch cabinet lower gate |
| CN204144094U (en) * | 2014-09-09 | 2015-02-04 | 扬州新概念电气有限公司 | A kind of lower door interlocking mechanism of switch cubicle |
| CN207149444U (en) * | 2017-06-26 | 2018-03-27 | 董佃平 | A kind of inflating switch cabinet interlock assembly |
| CN207319958U (en) * | 2017-10-29 | 2018-05-04 | 默飓电气有限公司 | It is a kind of to prevent from the interlocking mechanism do not opened the door during ground state |
| CN207852527U (en) * | 2018-02-09 | 2018-09-11 | 上海启腾电气股份有限公司 | A kind of lower door interlock for gas-filling cabinet |
| US10460888B1 (en) * | 2018-08-14 | 2019-10-29 | Ron Zeitler | Defeater assembly |
| CN210223885U (en) * | 2019-09-18 | 2020-03-31 | 吉林省金冠电气股份有限公司 | Fuse bin and cable chamber door interlock for SF6 insulation combined electrical appliance cabinet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111312538B (en) | 2022-07-19 |
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