CN109309378B - Anti-electrification disconnecting device - Google Patents
Anti-electrification disconnecting device Download PDFInfo
- Publication number
- CN109309378B CN109309378B CN201811435264.4A CN201811435264A CN109309378B CN 109309378 B CN109309378 B CN 109309378B CN 201811435264 A CN201811435264 A CN 201811435264A CN 109309378 B CN109309378 B CN 109309378B
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- Prior art keywords
- cable
- plug
- socket
- control loop
- main loop
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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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- 230000003287 optical effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
Abstract
The present disclosure relates to an anti-live disconnect device located in a cable, the device comprising: the cable is connected into a whole through the cable socket and the cable plug; the cable plug comprises a cable main loop plug and a cable control loop plug, wherein the length of the cable main loop plug is larger than that of the cable control loop plug. By setting the length of the cable main loop plug to be greater than the length of the cable control loop plug, according to the anti-electrification disconnection device disclosed by the embodiment of the invention, the cable control loop plug is disconnected from the cable socket firstly to trigger the tripping of the circuit breaker from the shore power system to the cable in the process of disconnecting the cable, so that the cable socket is not electrified when the cable main loop plug is disconnected from the cable socket, the occurrence of the electrified disconnection accident of the cable is avoided, and the emergency disconnection of the passive cable is realized.
Description
Technical Field
The disclosure relates to the field of cable protection, and in particular relates to an anti-electrification disconnection device.
Background
The ship at the dock has to adopt the auxiliary engine of the ship to generate electricity 24 hours a day so as to meet the electricity demand of the ship, the auxiliary engine burns a large amount of oil in operation, discharges a large amount of waste gas, and simultaneously generates noise pollution continuously for 24 hours. In order to solve this problem, a ship shore-based power supply system (hereinafter referred to as a shore power system) may be selected, and the shore power system is used to supply power to a ship moored to a dock.
The power output by the shore power system is connected with ship power by a cable conveying system so as to supply the power on the shore side to the ship side. An intelligent cable connection system from a shore power system to a ship power system comprises a switch cabinet (cable connection box), a cable reel winch (cable reel winch), a cable bridge, a cable guide frame, a control box, a wired and wireless controller of the ship side control cable reel winch and the like.
The cable connecting the shore power system and the ship power system often has insufficient cable length due to drift of the ship along with water flow and the like, and the accident of electrified cable breaking can be generated.
Disclosure of Invention
In view of this, the present disclosure proposes an anti-electrification disconnection device. The accident of electrified disconnection of the cable is avoided, and the emergency disconnection of the passive cable is realized.
According to an aspect of the present disclosure, there is provided an anti-live disconnect device located in a cable, the device comprising:
the cable is connected into a whole through the cable socket and the cable plug;
the cable plug comprises a cable main loop plug and a cable control loop plug, wherein the length of the cable main loop plug is larger than that of the cable control loop plug.
In one possible implementation, the cable sockets include a cable main loop socket and a cable control loop socket;
the cable main loop plug is inserted into the cable main loop socket, and the cable control loop plug is inserted into the cable control loop socket, so that the cables are connected into a whole.
In one possible implementation, the apparatus includes: a circuit breaker trip circuit and a first relay;
the cable control loop plug is connected with the circuit breaker through the first relay and the circuit breaker tripping loop;
the first relay is used for switching on a breaker tripping circuit to trip the breaker when the cable control circuit plug is disconnected from the cable control circuit socket.
In one possible implementation, the circuit breaker trip circuit includes: a second relay; and the second relay sends a breaker voltage-loss tripping signal to the breaker when detecting that the voltage is lower than the threshold value.
In one possible implementation, the apparatus further includes: arc extinguishing optical cable element;
the arc extinguishing optical cable element is mounted on the cable control loop socket.
In one possible implementation, the apparatus further includes: a magnet;
the cable socket and the cable plug are attracted through the magnet.
In one possible implementation, the cable is a switchgear to marine electrical system cable.
By setting the length of the cable main loop plug to be greater than the length of the cable control loop plug, according to the anti-electrification disconnection device disclosed by the embodiment of the invention, the cable control loop plug is disconnected from the cable socket firstly to trigger the tripping of the circuit breaker from the shore power system to the cable in the process of disconnecting the cable, so that the cable socket is not electrified when the cable main loop plug is disconnected from the cable socket, the occurrence of the electrified disconnection accident of the cable is avoided, and the emergency disconnection of the passive cable is realized.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 shows a schematic diagram of an intelligent cable connection system connecting a shore power system with a marine power system, in accordance with an embodiment of the present disclosure.
Fig. 2 illustrates a schematic cross-sectional structure of an anti-electrification disconnection device according to an embodiment of the present disclosure.
Fig. 3 illustrates a schematic cross-sectional view of an anti-charge disconnect device in accordance with an embodiment of the present disclosure.
Fig. 4 shows a block diagram of an anti-live disconnect device according to an embodiment of the present disclosure.
Fig. 5 shows a schematic diagram of a circuit breaker trip circuit in an anti-live disconnect apparatus according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the disclosure will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
In addition, numerous specific details are set forth in the following detailed description in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art have not been described in detail in order not to obscure the present disclosure.
Fig. 1 shows a schematic diagram of an intelligent cable connection system connecting a shore power system with a marine power system, in accordance with an embodiment of the present disclosure. As shown in fig. 1, power is input from shore power system 5 to switchgear 6, and switchgear 6 transmits power to marine power system 9 via cable 7 and cable drum winch 8 to power the vessel. Wherein the cable 7 is wound on the cable drum winch 8, and when power is supplied to the ship, the distance to the ship can be adapted by controlling the cable drum winch 8 to wind and unwind the cable 7. The anti-live disconnect device of the present disclosure may be located in the cable 7.
Fig. 2 illustrates a schematic cross-sectional structure of an anti-electrification disconnection device according to an embodiment of the present disclosure.
Fig. 3 illustrates a schematic cross-sectional view of an anti-charge disconnect device in accordance with an embodiment of the present disclosure. As shown in fig. 2 and 3, the anti-electrification disconnection device may include:
the cable is connected into a whole through the cable socket and the cable plug;
the cable plug comprises a cable main loop plug 2 and a cable control loop plug 1, wherein the length of the cable main loop plug 2 is larger than that of the cable control loop plug 1.
As shown in fig. 2, the cable socket and cable plug may be conductive cores in a cable. During normal operation, the cable plug is completely inserted into the cable socket, so that the cable plug and the cable socket are tightly connected. I.e. the cable 7 is tightly connected to the cable socket by means of a cable plug.
As shown in fig. 2, the left end of the cable where the cable socket is located may be connected to the switch cabinet, the right end (cable socket) of the cable where the cable socket is located may be connected to the left end (cable plug) of the cable where the cable plug is located, and the right end of the cable where the cable plug is located may be connected to the marine electrical system. When the switch cabinet is connected to the left end of the cable where the cable socket is located and is powered, the cable socket is live and by inserting the cable plug into the cable socket, the whole cable 7 can transmit power to the ship's electrical system.
If the length of the cable main loop plug 2 is L1, the length of the cable control loop plug 1 is L2, and L1 needs to be greater than L2, i.e., the depth of insertion of the cable main loop plug 2 into the corresponding cable socket (the distance that the cable main loop plug 2 can move in the cable socket) needs to be greater than the depth of insertion of the cable control loop plug 1 into the corresponding cable socket (the distance that the cable control loop plug 1 can move in the cable socket).
By setting the length of the cable main loop plug 1 to be greater than the length of the cable control loop plug 2, according to the anti-electrification disconnection device of the embodiment of the disclosure, the cable control loop plug 2 is disconnected from a cable socket to trigger the tripping of a circuit breaker from a shore power system to the cable in the disconnection process of the anti-electrification disconnection device of the cable, so that the cable socket is not electrified when the cable main loop plug 1 is disconnected from the cable socket, the occurrence of the accident of electrification disconnection of the cable is avoided, and the emergency disconnection of the passive cable is realized.
In one possible implementation, as shown in fig. 1, the cable may be a cable from the switchgear 6 to the avionics system 9.
As shown in fig. 2 and 3, in one possible implementation, the cable outlet may comprise a cable main loop outlet 4 and a cable control loop outlet 3.
The cable main loop plug 2 is inserted into the cable main loop socket 4, and the cable control loop plug 1 is inserted into the cable control loop socket 3, so that the cables are connected into a whole.
The cable main loop socket 4 and the cable control loop socket 3 may be jacks, and the diameter of the jacks of the cable main loop socket 4 may be the same as or different from the diameter of the jacks of the cable control loop socket 3, which is not limited in this disclosure. The present disclosure is not limited to the shape of the cable main loop socket 4 and the cable control loop socket 3.
The number of the cable main loop sockets 4 may be the same as the number of the cable main loop plugs 2, and the number of the cable control loop sockets 3 may be the same as the number of the cable control loop plugs 1. The number of cable main loop sockets 4 and the number of cable control loop sockets 3 are not limited in this disclosure.
When the shore power system supplies power to the marine power system, the cable control loop plug 1 of the cable can be inserted into the cable control loop socket 3, and the cable main loop plug 2 can be inserted into the cable main loop socket 4, so that the cable can be used normally.
Fig. 4 shows a block diagram of an anti-live disconnect device according to an embodiment of the present disclosure. As shown in fig. 4, the apparatus may further include: a circuit breaker trip circuit 11 and a first relay 12;
the cable control loop plug 1 can be connected to a circuit breaker 10 via a first relay 12 and a circuit breaker trip loop 11;
the first relay 12 may be used to switch on the breaker trip circuit 11 to trip the breaker 10 when the cable control circuit plug 1 is disconnected from the cable control circuit receptacle 3.
The cable control loop socket 3 can be sequentially connected with the cable control loop plug 1, the first relay 12, the breaker tripping loop 11 and the breaker 10 in series, when the cable control loop plug 1 is disconnected with the cable control loop socket 3, the first relay 12 loses electricity, the normally closed connector of the first relay 12 can be closed, the breaker tripping loop 11 is closed, and the breaker 10 trips, so that the power supply to the cable 7 is disconnected.
It should be noted that the above is merely an example of realizing no electrification when the cable is disconnected, and does not limit the present disclosure in any way. It will be appreciated that other schemes for enabling the un-powered disconnection of the cable may be employed by those skilled in the art.
Fig. 5 shows a schematic diagram of a circuit breaker trip circuit in an anti-live disconnect apparatus according to an embodiment of the present disclosure. In one possible implementation, as shown in fig. 5, the circuit breaker trip circuit may include: a second relay 13; the second relay 13 may be a voltage relay.
The second relay 13 may send a circuit breaker step-out trip signal to the circuit breaker 10 upon detecting that the voltage is below a threshold. The shore power system can cut off the power supply to the cable in time, and the cable is prevented from being broken by electrification.
Wherein the voltage may refer to a normal operating voltage. The threshold may be preset, for example, the threshold may be set according to an existing relay protection security policy, or the threshold may be set according to the actual scenario statistics, which is not limited by the present disclosure, as long as the threshold may ensure that the breaker is triggered to trip in time before the cable breaks.
When the first relay 12 turns on the breaker trip circuit and the breaker 10 cannot be tripped successfully, the breaker trip circuit 11 can also send a breaker voltage-loss trip signal to the breaker 10 to trip the breaker 10, so that the cable can be doubly ensured to be not broken in a live state.
In one possible implementation, the apparatus may further include: arc extinguishing optical cable element;
the arc suppressing optical cable element is mounted on the cable control loop socket 3.
The arc extinction optical cable element can conduct arc extinction when the cable fails, and thermal damage of a failure point is reduced.
In one possible implementation, the apparatus may further include: a magnet;
the cable socket and the cable plug are attracted through the magnet. The connection tightness of the cable is further improved.
When the cable is externally sent to the end by external force for some reason, and the external force applied to the cable is larger than the separation force of the anti-electrification disconnecting device of the cable (the separation force is related to the permanent magnet attraction force arranged on the anti-electrification disconnecting device and the total friction force of the cable socket and the cable plug), in the process of disconnecting the cable, the cable control loop plug of the anti-electrification disconnecting device is disconnected with the cable control loop socket firstly, and the circuit breaker is tripped when the main loop plug of the cable is disconnected with the main loop socket of the cable again.
Alternatively, after the situation is normal, the power supply to the avionics system can be restored by reconnecting the cable socket and the cable plug. The cable is prevented from being broken by electrification, and post-processing and recovery are facilitated.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement of the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (4)
1. An anti-live disconnect device, wherein the anti-live disconnect device is located in a cable, the device comprising:
the cable is connected into a whole through the cable socket and the cable plug;
the cable plug comprises a cable main loop plug and a cable control loop plug, wherein the length of the cable main loop plug is longer than that of the cable control loop plug;
wherein the cable socket comprises a cable main loop socket and a cable control loop socket; the cable main loop plugs are inserted into the cable main loop sockets, the cable control loop plugs are inserted into the cable control loop sockets, so that cables are connected into a whole, the number of the cable main loop sockets is the same as the number of the cable main loop plugs, and the number of the cable control loop sockets is the same as the number of the cable control loop plugs;
wherein the device comprises: a circuit breaker trip circuit and a first relay; the cable control loop plug is connected with the circuit breaker through the first relay and the circuit breaker tripping loop; the first relay is used for switching on a tripping circuit of the circuit breaker to trip the circuit breaker when the cable control circuit plug is disconnected with the cable control circuit socket;
wherein the circuit breaker trip circuit includes: a second relay; and the second relay sends a breaker voltage-loss tripping signal to the breaker when detecting that the voltage is lower than the threshold value.
2. An anti-live disconnect device as defined in claim 1, further comprising: arc extinguishing optical cable element;
the arc extinguishing optical cable element is mounted on the cable control loop socket.
3. An anti-live disconnect device as defined in claim 1, further comprising: a magnet;
the cable socket and the cable plug are attracted through the magnet.
4. An anti-live disconnect apparatus according to claim 1, wherein the cable is a switchgear-to-ship electrical system cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435264.4A CN109309378B (en) | 2018-11-28 | 2018-11-28 | Anti-electrification disconnecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435264.4A CN109309378B (en) | 2018-11-28 | 2018-11-28 | Anti-electrification disconnecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109309378A CN109309378A (en) | 2019-02-05 |
| CN109309378B true CN109309378B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811435264.4A Active CN109309378B (en) | 2018-11-28 | 2018-11-28 | Anti-electrification disconnecting device |
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| CN (1) | CN109309378B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109309378A (en) | 2019-02-05 |
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Effective date of registration: 20211230 Address after: 325604 No. 1, Changdong Road, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province (Room 201, 2f, building 10, Zhengtai Yueqing Internet of things sensor Industrial Park) Applicant after: Wenzhou Zhengtai Chuanan Electric Co.,Ltd. Applicant after: JIAXING WODAFENG HARDWARE Co.,Ltd. Address before: 200436 floor 5, No. 288, JIANGCHANG Third Road, Zhabei District, Shanghai (revoked) Applicant before: SHANGHAI ELECON INTELLIGENT TECHNOLOGY Co.,Ltd. Applicant before: JIAXING WODAFENG HARDWARE Co.,Ltd. |
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