CN210516597U - Low-pressure electric locking device of inflating cabinet - Google Patents
Low-pressure electric locking device of inflating cabinet Download PDFInfo
- Publication number
- CN210516597U CN210516597U CN201921638271.4U CN201921638271U CN210516597U CN 210516597 U CN210516597 U CN 210516597U CN 201921638271 U CN201921638271 U CN 201921638271U CN 210516597 U CN210516597 U CN 210516597U
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- circuit
- remote control
- switch
- intermediate relay
- signal
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- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 229910018503 SF6 Inorganic materials 0.000 description 11
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
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- Gas-Insulated Switchgears (AREA)
Abstract
The utility model discloses a low-pressure electric locking device of an air inflation cabinet, which comprises a control power supply, wherein the control power supply is electrically connected with an SF6 gas density relay, a control loop and a signal loop, and an S6F gas density relay is connected with an intermediate relay K21 in series; the control circuit is provided with a remote control switch for controlling power-on and power-off, the signal circuit is provided with an alarm signal end for alarming, when gas in the gas-filled cabinet leaks, the SF6 gas density relay sends out an alarm signal, current passes through the electromagnetic coil of the intermediate relay, so that the normally closed point of the intermediate relay on the control circuit of the intermediate relay K21 is disconnected, meanwhile, the alarm point of the intermediate relay on the signal circuit is switched on for alarming, and the normally working remote control switch is disconnected to ensure the safety and the use safety of equipment. The low-pressure electric lock is suitable for all schemes of inflating the cabinet, and the reliability is greatly improved.
Description
Technical Field
The utility model relates to the field of electrical technology, especially, relate to an aerify low pressure electric blocking device of cabinet.
Background
Indoor alternating-current high-voltage gas-insulated metal-enclosed switchgear (hereinafter referred to as "gas-filled cabinet") is a new generation of switchgear. The gas of the gas-filled cabinet is widely sulfur hexafluoride gas, and the gas has good controllability on insulation. The existing gas-filled cabinet gives out warning through an alarm signal point of the density relay when gas leaks, the gas-filled cabinet is monitored by the background, but only has an alarm function when an abnormal fault occurs, and technicians need to be additionally arranged for on-site maintenance. When a technician is not on site, the switch is in a working state, and accidents easily occur due to the fact that the insulation effect is worse and worse due to air leakage, and the switch needs to be manually switched off, so that the time is long.
Those skilled in the art have therefore endeavored to develop a low pressure electrical latch for an inflatable cabinet with alarm and automatic shutoff features.
Disclosure of Invention
In view of the above-mentioned defects in the prior art, the technical problem to be solved in the present invention is to provide a low-pressure electric locking device of an inflatable cabinet with alarm and automatic closing functions.
In order to achieve the above object, the present invention provides a low-pressure electric locking device for an air-filled cabinet, comprising a control power supply, wherein the control power supply is electrically connected to an SF6 gas density relay, the control power supply is also electrically connected to a control loop and a signal loop, and the S6F gas density relay is connected in series to an intermediate relay K21; the intermediate relay K21 is provided with an intermediate relay electromagnetic coil, an intermediate relay normally closed point and an intermediate relay alarm point which are matched and linked with each other.
The intermediate relay electromagnetic coil is connected with the SF6 gas density relay in series, the normally-closed point of the intermediate relay is arranged on the control loop, the alarm point of the intermediate relay is arranged on the signal loop, and the alarm point of the intermediate relay is normally opened; the control circuit is provided with a remote switch for controlling power-on and power-off, and the signal circuit is provided with an alarm signal end for alarming.
The control circuit comprises an anode circuit and a cathode circuit, one end of a normally-closed point of the intermediate relay is connected with the anode circuit, the other end of the normally-closed point of the intermediate relay is connected with a change-over switch, the output end of the change-over switch is connected with one end of a remote control closing circuit and one end of a remote control tripping circuit which are connected in parallel, the other ends of the remote control closing circuit and the remote control tripping circuit are connected with the cathode circuit, the remote control switch comprises a DTU remote control closing switch arranged on the remote control closing circuit and a DTU remote control tripping switch arranged on the remote control tripping circuit, and one end of the DTU remote control closing switch is connected with the output end of the change-over switch after being connected with one end of the DTU remote.
The control loop also comprises a manual closing circuit, a manual opening circuit, a protection tripping circuit, a closing indicating circuit, an opening indicating circuit and a microcomputer protection circuit.
One end of the manual closing circuit is connected with the other end of the DTU remote control closing switch and then connected with the output end of the change-over switch, one end of the manual closing circuit is further sequentially connected with a first contactor, an isolating switch and a grounding switch, and the other end of the grounding switch is connected with the negative pole circuit.
One end of the manual brake separating circuit is connected with the output end of the change-over switch and the other end of the DTU remote control tripping switch, and the other end of the manual brake separating circuit is connected with the negative electrode circuit after being connected with the second contactor.
The tripping circuit comprises a microcomputer protection device and a connecting sheet which are connected in series, and the output end of the connecting sheet is connected with the output end of the change-over switch.
The combined floodgate pilot line is including the first circuit breaker and the first pilot lamp of series connection, the separating brake pilot line is including the second circuit breaker and the second pilot lamp of series connection, the input of first circuit breaker and second circuit breaker with anodal line connection, the output of first pilot lamp and second pilot lamp with negative pole line connection, the second circuit breaker normally closed.
The microcomputer protection circuit comprises a microcomputer protection device, wherein the input end of the microcomputer protection device is connected with the positive electrode circuit, and the output end of the microcomputer protection device is connected with the negative electrode circuit.
The signal loop is provided with a signal input joint, the change-over switch comprises a remote control end, the microcomputer protection device comprises a protection action signal end and an alarm signal end, and the signal input joint is electrically connected with the intermediate relay alarm point, the remote control end, the protection action signal end and the alarm signal end in parallel.
The utility model has the advantages that: the utility model discloses a low-pressure electric locking device of an air inflation cabinet, which comprises a control power supply, wherein the control power supply is electrically connected with an SF6 gas density relay, the control power supply is also electrically connected with a control loop and a signal loop, and an S6F gas density relay is connected with an intermediate relay K21 in series; the intermediate relay K21 is provided with an intermediate relay electromagnetic coil, an intermediate relay normally closed point and an intermediate relay alarm point which are matched and linked with each other; the electromagnetic coil of the intermediate relay is connected with the SF6 gas density relay in series, the normally closed point of the intermediate relay is arranged on the control loop, the alarm point of the intermediate relay is arranged on the signal loop, and the alarm point of the intermediate relay is normally opened; the control circuit is provided with a remote control switch for controlling power-on and power-off, the signal circuit is provided with an alarm signal end for alarming, when gas in the gas-filled cabinet leaks, the SF6 gas density relay 2 sends an alarm signal, current passes through the intermediate relay electromagnetic coil 3, so that the intermediate relay normally-closed point 4 of the intermediate relay K21 on the control circuit is disconnected, meanwhile, the intermediate relay alarm point 5 is switched on for alarming, and the normally-working remote control switch is disconnected to ensure the safety and the use safety of equipment. The low-pressure electric lock is suitable for all schemes of inflating the cabinet, and the reliability is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of a signal loop;
fig. 3 is a schematic diagram of the structure of the control loop.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to fig. 3, the low-pressure electric locking device of the gas-filled cabinet comprises a control power supply 1, wherein the control power supply 1 is electrically connected with an SF6 gas density relay 2, the control power supply 1 is also electrically connected with a control loop and a signal loop, and the SF6 gas density relay 2 is connected with an intermediate relay K21 in series; the intermediate relay K21 is provided with an intermediate relay electromagnetic coil 3, an intermediate relay normally-closed point 4 and an intermediate relay alarm point 5 which are matched and linked with each other; an intermediate relay electromagnetic coil 3 is connected with an SF6 gas density relay 2 in series, an intermediate relay normally-closed point 4 is arranged on a control loop, an intermediate relay alarm point 5 is arranged on a signal loop, and the intermediate relay alarm point 5 is normally opened; the control loop is provided with a remote switch for controlling power-on and power-off, and the signal loop is provided with an alarm signal end 32 for alarming; when the gas in the gas-filled cabinet leaks, the SF6 gas density relay 2 sends an alarm signal, the current passes through the intermediate relay electromagnetic coil 3, so that the intermediate relay normally-closed point 4 of the intermediate relay K21 on the control loop is disconnected, meanwhile, the intermediate relay alarm point 5 is switched on to alarm, and the normally-working remote control switch is disconnected to ensure the safety and the use safety of the equipment. The low-pressure electric lock is suitable for all schemes of inflating the cabinet, and the reliability is greatly improved.
The control circuit comprises an anode line 6 and a cathode line 7, one end of an intermediate relay normally-closed point 4 is connected with the anode line 6, the other end of the intermediate relay normally-closed point 4 is connected with a change-over switch 8, the output end of the change-over switch 8 is connected with one end of a remote control closing line 9 and one end of a remote control tripping line 10 which are connected in parallel, the other ends of the remote control closing line 9 and the remote control tripping line 10 are connected with the cathode line 7, the remote control switch comprises a DTU remote control closing switch 11 arranged on the remote control closing line 9 and a DTU remote control tripping switch 12 arranged on the remote control tripping line 10, and one end of the DTU remote control closing switch 11 is connected with the output end of the change-over switch 8 after being connected with.
The control loop also comprises a manual closing circuit 13, a manual opening circuit 14, a protection tripping circuit 15, a closing indication circuit 16, an opening indication circuit 17 and a microcomputer protection circuit 18.
One end of the manual closing circuit 13 is connected with the other end of the DTU remote control closing switch 11 and then connected with the output end of the change-over switch 8, one end of the manual closing circuit 13 is further sequentially connected with a first contactor 19, an isolating switch 20 and a grounding switch 21, and the other end of the grounding switch 21 is connected with the negative electrode circuit 7.
One end of the manual opening circuit 14 is connected with the output end of the change-over switch 8 and the other end of the DTU remote control tripping switch 12, and the other end of the manual opening circuit 14 is connected with the negative electrode circuit 7 after being connected with the second contactor 22.
The trip circuit 15 comprises a microcomputer protection device 23 and a connection pad 24 connected in series, the output of the connection pad 24 being connected to the output of the changeover switch 8.
The closing indication line 16 comprises a first circuit breaker 25 and a first indicator light 26 which are connected in series, the opening indication line 17 comprises a second circuit breaker 27 and a second indicator light 28 which are connected in series, the input ends of the first circuit breaker 25 and the second circuit breaker 27 are connected with the positive pole line 6, the output ends of the first indicator light 26 and the second indicator light 28 are connected with the negative pole line 7, and the second circuit breaker 27 is normally closed;
the microcomputer protection circuit 18 comprises a microcomputer protection device 23, the input end of the microcomputer protection device 23 is connected with the positive electrode circuit 6, and the output end of the microcomputer protection device 23 is connected with the negative electrode circuit 7.
The signal loop is provided with a signal input joint 29, the change-over switch 8 comprises a remote control end 30, the microcomputer protection device 23 comprises a protection action signal end 31 and an alarm signal end 32, and the signal input joint 29 is electrically connected with the intermediate relay alarm point 5, the remote control end 30, the protection action signal end 31 and the alarm signal end 32 in parallel.
The utility model discloses a theory of operation is:
when gas in the gas-filled cabinet leaks, the SF6 gas density relay 2 sends an alarm signal, the signal passes through the intermediate relay electromagnetic coil 3, so that the intermediate relay K21 is disconnected at an intermediate relay normally-closed point 4 of an operation loop, meanwhile, an intermediate relay alarm point 5 is turned on for alarming, a protection action signal end 31 and an alarm signal end 32 on the microcomputer protection device 23 respectively send a protection action signal and an alarm signal, a remote control end 30 on the change-over switch 8 sends a remote control signal, the change-over switch 8 is turned off by controlling the DTU remote control trip switch 12 to disconnect the trip remote control circuit 10, power supply is stopped, equipment is protected, and meanwhile, the second indicator lamp 28 is turned off. The safety and the use safety of the equipment are ensured by breaking the normally working switch. The low-pressure electric lock is suitable for all schemes of inflating the cabinet, and the reliability is greatly improved.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (4)
1. The utility model provides a aerify cabinet's low pressure electric blocking device, includes control power supply (1), control power supply (1) electricity is connected with SF6 gas density relay (2), characterized by: the control power supply (1) is also electrically connected with a control loop and a signal loop, and the SF6 gas density relay (2) is connected with an intermediate relay (K21) in series; the intermediate relay (K21) is provided with an intermediate relay electromagnetic coil (3), an intermediate relay normally-closed point (4) and an intermediate relay alarm point (5) which are matched and linked with each other; the intermediate relay electromagnetic coil (3) is connected with the SF6 gas density relay (2) in series, the intermediate relay normally-closed point (4) is arranged on the control loop, the intermediate relay alarm point (5) is arranged on the signal loop, and the intermediate relay alarm point (5) is normally opened; the control circuit is provided with a remote switch for controlling power-on and power-off, and the signal circuit is provided with an alarm signal end (32) for alarming.
2. The low pressure electrical latch of an inflatable cabinet as claimed in claim 1, wherein: the control loop comprises a positive electrode circuit (6) and a negative electrode circuit (7), one end of the intermediate relay normally-closed point (4) is connected with the positive electrode circuit (6), the other end of the normally closed point (4) of the intermediate relay is connected with a change-over switch (8), the output end of the change-over switch (8) is connected with one end of a remote control closing circuit (9) and one end of a remote control tripping circuit (10) which are connected in parallel, the other ends of the remote control closing circuit (9) and the remote control tripping circuit (10) are connected with the negative pole circuit (7), the remote control switch comprises a DTU remote control switch-on switch (11) arranged on the remote control switch-on circuit (9) and a DTU remote control trip switch (12) arranged on the remote control trip circuit (10), one end of the DTU remote control closing switch (11) is connected with one end of the DTU remote control tripping switch (12) in parallel and then is connected with the output end of the change-over switch (8).
3. The low pressure electrical latch for an inflatable cabinet as claimed in claim 2, wherein: the control loop also comprises a manual switching-on circuit (13), a manual switching-off circuit (14), a protection tripping circuit (15), a switching-on indicating circuit (16), a switching-off indicating circuit (17) and a microcomputer protection circuit (18);
one end of the manual closing circuit (13) is connected with the other end of the DTU remote control closing switch (11) and then connected with the output end of the change-over switch (8), one end of the manual closing circuit (13) is sequentially connected with a first contactor (19), an isolating switch (20) and a grounding switch (21), and the other end of the grounding switch (21) is connected with the negative electrode circuit (7);
one end of the manual brake separating line (14) is connected with the output end of the change-over switch (8) and the other end of the DTU remote control tripping switch (12), and the other end of the manual brake separating line (14) is connected with the negative electrode line (7) after being connected with a second contactor (22);
the trip circuit (15) comprises a microcomputer protection device (23) and a connecting sheet (24) which are connected in series, and the output end of the connecting sheet (24) is connected with the output end of the change-over switch (8);
the switching-on indicating line (16) comprises a first circuit breaker (25) and a first indicating lamp (26) which are connected in series, the switching-off indicating line (17) comprises a second circuit breaker (27) and a second indicating lamp (28) which are connected in series, the input ends of the first circuit breaker (25) and the second circuit breaker (27) are connected with the positive line (6), the output ends of the first indicating lamp (26) and the second indicating lamp (28) are connected with the negative line (7), and the second circuit breaker (27) is normally closed;
the microcomputer protection circuit (18) comprises a microcomputer protection device (23), the input end of the microcomputer protection device (23) is connected with the positive electrode circuit (6), and the output end of the microcomputer protection device (23) is connected with the negative electrode circuit (7).
4. The low pressure electrical latch of an inflatable cabinet as claimed in claim 3, wherein: the signal loop is provided with a signal input connector (29), the change-over switch (8) comprises a remote control end (30), the microcomputer protection device (23) comprises a protection action signal end (31) and an alarm signal end (32), and the signal input connector (29) is electrically connected with the intermediate relay alarm point (5), the remote control end (30), the protection action signal end (31) and the alarm signal end (32) in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921638271.4U CN210516597U (en) | 2019-09-27 | 2019-09-27 | Low-pressure electric locking device of inflating cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921638271.4U CN210516597U (en) | 2019-09-27 | 2019-09-27 | Low-pressure electric locking device of inflating cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210516597U true CN210516597U (en) | 2020-05-12 |
Family
ID=70572082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921638271.4U Expired - Fee Related CN210516597U (en) | 2019-09-27 | 2019-09-27 | Low-pressure electric locking device of inflating cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210516597U (en) |
-
2019
- 2019-09-27 CN CN201921638271.4U patent/CN210516597U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200512 |