CN212083611U - Sampling circuit of gas density relay - Google Patents
Sampling circuit of gas density relay Download PDFInfo
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- CN212083611U CN212083611U CN202020045410.9U CN202020045410U CN212083611U CN 212083611 U CN212083611 U CN 212083611U CN 202020045410 U CN202020045410 U CN 202020045410U CN 212083611 U CN212083611 U CN 212083611U
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- gas density
- density relay
- sampling circuit
- switch
- emitting diode
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Abstract
The utility model relates to the technical field of electric power, a sampling circuit of gas density relay is disclosed, including the feed end, the sampling output end, an opto-coupler and a first resistance, the feed end is used for being connected with the first end of the switch of gas density relay, the positive pole of emitting diode is used for being connected with the second end of the switch of gas density relay, the negative pole ground connection of emitting diode, the collecting electrode of phototriode is connected with the sampling output end, the collecting electrode of phototriode is still connected with the feed end through the first resistance, the projecting pole ground connection of phototriode, when the switch of gas density relay is disconnected, emitting diode is cut off, thereby make phototriode also cut off, the sampling output end is because of being connected with the feed end, therefore output high level, and when the switch of gas density relay is closed, emitting diode is switched on, thereby make phototrio, therefore, low level is output, sampling of the gas density relay is achieved, and the method is simple and practical.
Description
Technical Field
The utility model relates to an electric power tech field especially relates to a sampling circuit of gas density relay.
Background
At present, the switch device is an electrical device that has been widely used in the power system, and the reliable operation thereof also becomes one of the important guarantees for the stable power supply of the power system. The gas density relay is a gas density monitoring device installed on the switch equipment, is an important device for monitoring the change of gas density and ensures the insulating property of the switch equipment. If the gas density drops to a corresponding threshold value, an alarm or lock is generated to prevent a catastrophic explosion of the switchgear during operation. In order to detect the closing or opening of the contact of the gas density relay, a sampling circuit is generally needed, but the existing sampling circuit of the gas density relay is relatively complex.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a gas density relay's sampling circuit, its sampling circuit that can avoid current gas density relay is more complicated problem.
In order to solve the technical problem, the utility model provides a sampling circuit of gas density relay, including power supply end, sampling output end, opto-coupler and first resistance, the opto-coupler includes emitting diode and phototriode;
the power supply end is used for being connected with a first end of a switch of the gas density relay; the positive pole of emitting diode is used for holding with the second of the switch of gas density relay and is connected, emitting diode's negative pole ground connection, the collecting electrode of phototriode with the sampling output end is connected, the collecting electrode of phototriode still passes through first resistance with the power supply end is connected, the projecting pole ground connection of phototriode.
As a preferred scheme, the power supply end is used for being connected with a first end of a switch of a gas density relay, and specifically comprises: the sampling circuit of the gas density relay further comprises a one-way conduction unit, the anode of the one-way conduction unit is connected with the power supply end, and the cathode of the one-way conduction unit is used for being connected with the first end of the switch of the gas density relay.
As a preferred scheme, the cathode of the light emitting diode is grounded, specifically: the sampling circuit of the gas density relay further comprises a second resistor, and the cathode of the light-emitting diode is grounded through the second resistor.
Preferably, the sampling circuit of the gas density relay further comprises a control module and a display module, and the control module is respectively connected with the sampling output end and the display module.
Preferably, the display module is an indicator light or a nixie tube or a display.
Preferably, the sampling circuit of the gas density relay further comprises a first relay, and the first relay comprises a magnetic induction coil and two change-over switches; the control module is connected with the magnetic induction coil, a first end of one of the change-over switches is used for being connected with a first end of a switch of the gas density relay, a first end of the other change-over switch is used for being connected with a second end of the switch of the gas density relay, and second ends of the two change-over switches are respectively used for being connected with a control loop of electrical equipment.
Preferably, the sampling circuit of the gas density relay further comprises a control valve, the control valve is used for controlling the on-off of a gas path between the gas density relay and the electrical equipment, and the control module is electrically connected with the control valve.
Preferably, the sampling circuit of the gas density relay further comprises a temperature sensor, and the control module is electrically connected with the temperature sensor.
Preferably, the sampling circuit of the gas density relay further comprises a pressure sensor, and the control module is electrically connected with the pressure sensor.
The utility model provides a sampling circuit of gas density relay, including the feed end, the sampling output end, opto-coupler and first resistance, the opto-coupler includes emitting diode and phototriode, the feed end is used for being connected with the first end of the switch of gas density relay, emitting diode's positive pole is used for being connected with the second end of the switch of gas density relay, emitting diode's negative pole ground connection, the collecting electrode of phototriode is connected with the sampling output end, the collecting electrode of phototriode still is connected with the feed end through first resistance, the projecting pole ground connection of phototriode, when the switch of gas density relay breaks off, emitting diode ends, thereby make phototriode also end, the sampling output end is because be connected with the feed end, therefore export the high level, and when the switch of gas density relay is closed, emitting diode switches on, thereby make phototriode also switch on, the potential of the sampling output end is reduced, so that low level is output, the sampling of the gas density relay is realized, and the sampling device is simple and practical.
Drawings
Fig. 1 is a circuit diagram of an embodiment of a sampling circuit of a gas density relay provided by the present invention;
fig. 2 is a circuit diagram of another embodiment of a sampling circuit of a gas density relay provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a sampling circuit of a gas density relay according to a preferred embodiment of the present invention includes a power supply terminal VCC, a sampling output terminal out, an optical coupler OC1 and a first resistor R1, where the optical coupler OC1 includes a light emitting diode and a phototransistor;
the power supply terminal VCC is used for being connected with a first terminal of a switch PJ of the gas density relay; the anode of the light emitting diode is used for being connected with the second end of a switch PJ of the gas density relay, the cathode of the light emitting diode is grounded, the collector of the phototriode is connected with the sampling output end out, the collector of the phototriode is further connected with the power supply end VCC through the first resistor R1, and the emitter of the phototriode is grounded.
The embodiment of the utility model provides an in, when gas density relay's switch PJ closed, emitting diode switches on to make the phototriode also switch on, draw down the electric potential of sampling output, thereby output low level has realized the sampling to gas density relay, simple and practical.
In an optional embodiment, the power supply terminal VCC is configured to be connected to a first terminal of a switch PJ of a gas density relay, specifically: the sampling circuit of gas density relay still includes one-way switch-on unit D1, one-way switch-on unit D1's positive pole with the power supply end VCC connects, one-way switch-on unit D1's negative pole is used for being connected with the first end of gas density relay's switch PJ. The unidirectional conducting unit D1 may be a diode.
In an optional embodiment, the cathode of the light emitting diode is grounded, specifically: the sampling circuit of the gas density relay further comprises a second resistor R2, and the cathode of the light-emitting diode is grounded through the second resistor R2.
Referring to fig. 2, in an alternative embodiment, the sampling circuit of the gas density relay further includes a control module 8 and a display module 13, and the control module 8 is connected to the sampling output end out and the display module 13, respectively. Preferably, the display module is an indicator light or a nixie tube or a display.
Referring to fig. 2, in an alternative embodiment, the sampling circuit of the gas density relay further includes a first relay, which includes a magnetic induction coil J1 and two switches J11, J12; the control module 8 is connected to the magnetic induction coil J1, wherein a first end of one of the switches J11 is used for being connected to a first end of a switch PJ of the gas density relay, a first end of the other switch J12 is used for being connected to a second end of the switch PJ of the gas density relay, and second ends of the two switches J11 and J12 are respectively used for being connected to a control circuit of an electrical device.
In specific implementation, when the switching switches J11 and J12 are closed, the closing or opening condition of the switch PJ of the gas density relay can be fed back to the electrical equipment, so that when the gas density is monitored to be abnormal, a control loop of the electrical equipment performs corresponding operation according to the closing or opening condition of the switch PJ of the gas density relay, and the electrical equipment can work safely and reliably. In a specific application, the first relay may specifically be an electromagnetic relay, and when the gas density relay is verified, the gas density relay and the control loop of the electrical device are disconnected by controlling the switches J11 and J12 to be disconnected, so that normal operation of the electrical device is prevented from being affected.
Referring to fig. 2, in an optional embodiment, the sampling circuit of the gas density relay further includes a control valve 5, the control valve 5 is used for controlling on/off of a gas path between the gas density relay and an electrical device, and the control module 8 is electrically connected to the control valve 5. In addition, the sampling circuit of the gas density relay further comprises a temperature sensor 4, and the control module 8 is electrically connected with the temperature sensor 4. In addition, the sampling circuit of the gas density relay further comprises a pressure sensor 3, and the control module 8 is electrically connected with the pressure sensor 3. The control module 8 controls the control valve 5 to control the on-off of the gas path between the gas density monitoring device and the electrical equipment, for example, when the gas density monitoring device needs to monitor the gas density of the electrical equipment, the control module 8 can control the control valve 5 to be opened, so that the gas path between the gas density monitoring device and the electrical equipment is communicated, and further the gas density monitoring can be carried out. In addition, the control module 8 controls the control valve 5 to be closed, so that the gas path between the gas density monitoring device and the electrical equipment can be isolated, and the gas density relay can be conveniently verified. Preferably, the pressure sensor 3 may be various pressure sensing elements such as a pressure transmitter, the temperature sensor 4 may be various temperature sensing elements such as a temperature transmitter, the control valve 5 may be an electromagnetic control valve or an electric control valve, and the control valve 5 may be sealed in a cavity or a housing.
To sum up, the embodiment of the present invention provides a sampling circuit of a gas density relay, including a power supply terminal VCC, a sampling output terminal out, an optical coupler OC1 and a first resistor R1, the optical coupler OC1 includes a light emitting diode and a phototransistor, the power supply terminal VCC is used for being connected with a first end of a switch PJ of the gas density relay, an anode of the light emitting diode is used for being connected with a second end of the switch PJ of the gas density relay, a cathode of the light emitting diode is grounded, a collector of the phototransistor is connected with the sampling output terminal out, the collector of the phototransistor is further connected with the power supply terminal VCC through the first resistor R1, an emitter of the phototransistor is grounded, when the switch PJ of the gas density relay is disconnected, the light emitting diode is cut off, so that the phototransistor is also cut off, the sampling output terminal out is connected with the power supply terminal VCC, therefore, a high level is output, and when the switch p, the light-emitting diode is conducted, so that the phototriode is also conducted, the potential of the sampling output end is lowered, the low level is output, the sampling of the gas density relay is realized, and the device is simple and practical.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (9)
1. The sampling circuit of the gas density relay is characterized by comprising a power supply end, a sampling output end, an optocoupler and a first resistor, wherein the optocoupler comprises a light-emitting diode and a phototriode;
the power supply end is used for being connected with a first end of a switch of the gas density relay; the positive pole of emitting diode is used for holding with the second of the switch of gas density relay and is connected, emitting diode's negative pole ground connection, the collecting electrode of phototriode with the sampling output end is connected, the collecting electrode of phototriode still passes through first resistance with the power supply end is connected, the projecting pole ground connection of phototriode.
2. The sampling circuit of a gas density relay of claim 1, wherein the power supply terminal is adapted to be connected to a first terminal of a switch of the gas density relay, in particular: the sampling circuit of the gas density relay further comprises a one-way conduction unit, the anode of the one-way conduction unit is connected with the power supply end, and the cathode of the one-way conduction unit is used for being connected with the first end of the switch of the gas density relay.
3. The sampling circuit of a gas density relay of claim 2, wherein the cathode of the light emitting diode is grounded, specifically: the sampling circuit of the gas density relay further comprises a second resistor, and the cathode of the light-emitting diode is grounded through the second resistor.
4. The sampling circuit of the gas density relay according to any of claims 1 to 3, wherein the sampling circuit of the gas density relay further comprises a control module and a display module, the control module being connected to the sampling output and the display module, respectively.
5. The sampling circuit of a gas density relay of claim 4, wherein the display module is an indicator light or a nixie tube or a display.
6. The sampling circuit of a gas density relay of claim 4, wherein the sampling circuit of a gas density relay further comprises a first relay comprising a magnetic induction coil and two switches; the control module is connected with the magnetic induction coil, a first end of one of the change-over switches is used for being connected with a first end of a switch of the gas density relay, a first end of the other change-over switch is used for being connected with a second end of the switch of the gas density relay, and second ends of the two change-over switches are respectively used for being connected with a control loop of electrical equipment.
7. The sampling circuit of the gas density relay according to claim 4, wherein the sampling circuit of the gas density relay further comprises a control valve for controlling the on/off of a gas path between the gas density relay and an electrical device, and the control module is electrically connected with the control valve.
8. The sampling circuit of a gas density relay of claim 4, wherein the sampling circuit of a gas density relay further comprises a temperature sensor, and the control module is electrically connected to the temperature sensor.
9. The sampling circuit of a gas density relay of claim 4, wherein the sampling circuit of a gas density relay further comprises a pressure sensor, the control module being electrically connected to the pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020045410.9U CN212083611U (en) | 2020-01-08 | 2020-01-08 | Sampling circuit of gas density relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020045410.9U CN212083611U (en) | 2020-01-08 | 2020-01-08 | Sampling circuit of gas density relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212083611U true CN212083611U (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020045410.9U Active CN212083611U (en) | 2020-01-08 | 2020-01-08 | Sampling circuit of gas density relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212083611U (en) |
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2020
- 2020-01-08 CN CN202020045410.9U patent/CN212083611U/en active Active
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