CN219624929U - Temperature sensor system for nut type high-voltage switch - Google Patents
Temperature sensor system for nut type high-voltage switch Download PDFInfo
- Publication number
- CN219624929U CN219624929U CN202320596932.1U CN202320596932U CN219624929U CN 219624929 U CN219624929 U CN 219624929U CN 202320596932 U CN202320596932 U CN 202320596932U CN 219624929 U CN219624929 U CN 219624929U
- Authority
- CN
- China
- Prior art keywords
- resistor
- input end
- nut
- adjustable resistor
- thermistor
- Prior art date
- 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.)
- Active
Links
Landscapes
- Thermally Actuated Switches (AREA)
Abstract
The temperature sensor system for the nut type high-voltage switch comprises a power supply module, a ring main unit load switch fixing nut, a storage battery, a detection circuit and a comparison circuit; the outer side end of the fixing nut is provided with an opening, and the thermistor is arranged in the opening of the fixing nut; the power module, the storage battery, the detection circuit and the comparison circuit are arranged in the element box and are electrically connected. The utility model discloses a thermistor carries out temperature detection to ring main unit load switch's coupling nut, when the temperature exceeded the threshold value, can report to the police the suggestion (the staff overhauls load end and electrical equipment etc.) to the staff through the buzzer warning very first time, simultaneously, can also break off the output power of circuit breaker, the load end stops getting electric work, has ensured load end safety as far as from this, has reduced the trouble and has enlarged. Based on the above, the utility model has good application prospect.
Description
Technical Field
The utility model relates to the technical field of detection equipment, in particular to a temperature sensor system for a nut type high-voltage switch.
Background
The ring main unit is an electrical device with a group of high-voltage switch devices arranged in a steel plate metal cabinet body or made into an assembled interval ring main unit, and the core part of the ring main unit adopts a load switch, a fuse, a breaker and the like, and has the advantages of simple structure, small volume, low price, capability of improving power supply parameters and performance, power supply safety and the like. When electric equipment in the ring main unit is installed, fixing nuts (such as copper bars for incoming or outgoing lines of a fixed load switch) are used for fixedly connecting related electric equipment with conductive copper bars and the like. In the prior art, a temperature monitoring system is generally installed in the ring main unit, and workers are prompted to overhaul when temperature abnormality occurs, so that safe and stable operation of the ring main unit is ensured as much as possible.
The patent number 202122541299.X of China and the patent name "a ring main unit with a temperature detection device" are issued to the patent, and the content of the patent is recorded in that a temperature detector 22 extending into the cabinet 1 is fixedly arranged at the center position of one side of the top end of the cabinet 1, and the temperature detector 22 detects the temperature in the cabinet 1. The above-mentioned content shows that, although the temperature detection in the looped netowrk cabinet has been realized to a certain extent to the patent of comparison, but it is the same with all other looped netowrk cabinet temperature monitoring system at present, still has some technical problem because the structure is limited, the concrete embodiment is as follows. The method comprises the following steps: because the temperature detector detects the temperature in the whole ring main unit, that is to say, if the temperature is too high due to the fact that the load is too large or the temperature is too short-circuited by a special load switch in the cabinet body, the heating area of the heating point of the load switch is limited in practice, a certain time is required for heating the whole temperature in the ring main unit, the temperature detector is insensitive to reaction, and when the temperature in the whole ring main unit is waited to rise to the alarm temperature, the temperature of the load switch is likely to be far out of standard, so that the temperature of the load switch is likely to be far out of standard, and the like, as staff cannot know the temperature rising condition in time for the first time, the probability of expanding faults of the load end exists (for example, the follow-up serious fire accidents can be caused by the fact that the load cannot be reduced in time when the load is too large). And two,: the power supply of the load end cannot be automatically disconnected when the temperature is ultrahigh, so that the protection effect on the power utilization line cannot be achieved. In summary, it is especially necessary to provide a system which can alarm at the first time when the heating of the electric equipment easy to generate in the ring main unit exceeds the threshold value and can timely disconnect the power supply of the load end.
Disclosure of Invention
In order to overcome the defects of the prior ring main unit temperature monitoring system as described in the background due to the limitation of the structure, the utility model provides the nut type temperature sensor system for the high-voltage switch, which is used for detecting the temperature of the connecting nut of the ring main unit load switch under the combined action of related mechanisms and circuits, alarming and prompting the staff at the first time when the temperature exceeds a threshold value and disconnecting the output power supply of the circuit breaker, thereby ensuring the safety of the load end as much as possible.
The technical scheme adopted for solving the technical problems is as follows:
the temperature sensor system for the nut type high-voltage switch comprises a power supply module, a ring main unit load switch fixing nut and a storage battery, and is characterized by further comprising a detection circuit and a comparison circuit; the outer side end of the fixing nut is provided with an opening, the detection circuit is matched with a thermistor, and the thermistor is arranged in the opening of the fixing nut; the power module, the storage battery, the detection circuit and the comparison circuit are arranged in the element box, the power output end of the power module is electrically connected with the detection circuit and the power input end of the comparison circuit, the signal output end of the detection circuit is electrically connected with the signal input end of the comparison circuit, and the signal control end of the comparison circuit is electrically connected with the lower two contacts of the experimental button of the circuit breaker in the ring main unit respectively.
Further, the thermistor is a negative temperature coefficient thermistor.
Further, the detection circuit comprises a resistor, a liquid crystal voltmeter, an adjustable resistor, a thermistor, a first adjustable resistor and a second adjustable resistor, wherein the resistor is electrically connected with the liquid crystal voltmeter, one end of the thermistor is connected with one end of the resistor, the other end of the resistor is connected with one end of the second adjustable resistor, the other end of the second adjustable resistor is connected with the positive electrode of the voltmeter, and the negative electrode of the voltmeter is connected with the other end of the adjustable resistor.
Further, the comparison circuit comprises an operational amplifier, an adjustable resistor, a relay and a buzzer which are electrically connected, wherein one end of the first adjustable resistor is connected with an anode power input end of the operational amplifier and a PNP triode emitter, the other end of the first adjustable resistor is connected with a non-inverting input end of the operational amplifier, one end of the first resistor is connected with one end of the second adjustable resistor, one end of the second adjustable resistor is connected with a reverse input end of the operational amplifier, the other end of the first resistor is connected with the other end of the second resistor, a cathode power input end of the operational amplifier, a cathode power input end of the buzzer and a cathode power input end of the relay are connected, an output end of the operational amplifier is connected with a PNP triode base electrode, and a collector of the PNP triode is connected with the anode power input end of the buzzer and the anode power input end of the relay.
The utility model has the beneficial effects that: the utility model discloses under relevant mechanism and circuit combined action, through thermistor to ring main unit load switch's coupling nut (when the temperature is unusual, coupling nut and copper bar junction temperature rise are most obvious) carry out temperature detection, when the temperature exceeded the threshold value, can report to the police the suggestion (the staff overhauls load end and electrical equipment etc.) to the staff through the buzzer warning in the first time, simultaneously, can also break off the output power of circuit breaker, the load end stops getting electric work, thereby ensured load end safety as far as from, the trouble is enlarged has been reduced. Based on the above, the utility model has good application prospect.
Drawings
The utility model is further described below with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the structure of the present utility model.
Fig. 2 is a circuit diagram of the present utility model.
Detailed Description
Fig. 1 and 2 show a temperature sensor system for a nut type high-voltage switch, which comprises a power module A1, a fixed nut 2 between a ring main unit load switch and a copper bar, a storage battery G1, a detection circuit 3 and a comparison circuit 4; the middle part of the outer side end of the fixed nut 2 is provided with an opening, the detection circuit is matched with a thermistor RT, the thermistor RT is tightly sleeved in the opening of the fixed nut 2, and the heating surface of the thermistor RT is tightly attached to the inner side of the opening of the nut 2; the power module A1, the storage battery G1, the detection circuit 3 and the comparison circuit 4 are arranged on a circuit board in the element box 5, the element box 5 is arranged at the front outer upper end of the ring main unit, and a display interface of the voltmeter is positioned outside an opening at the front end of the element box.
As shown in fig. 1 and 2, the thermistor RT is a negative temperature coefficient thermistor; the power supply module A1 is a finished product of a 220V-to-DC 12V switching power supply module with the model of 220V/12V/1 KW; battery G1 is a lithium battery of model 12V/10 Ah. The detection circuit comprises a resistor R2, a liquid crystal voltage display meter V, adjustable resistors RP and RP3, wherein the resistor R2 is connected through circuit board wiring, one end of the thermistor RT is connected with one end of the resistor R2, one end of the first adjustable resistor RP is connected, the other end of the resistor R2 is connected with one end of the second adjustable resistor RP3, the other end of the second adjustable resistor RP3 is connected with the positive electrode of the voltmeter V, and the negative electrode of the voltmeter V is connected with the other end of the adjustable resistor RP. The comparison circuit comprises an operational amplifier A2, adjustable resistors RP1 and RP2, resistors R3 and R4, a relay K1 and a buzzer B, PNP triode Q1 which are connected through circuit board wiring, wherein one end of the first adjustable resistor RP1 is connected with a positive power input end 7 pin of the operational amplifier A2 and a PNP triode Q1 emitter electrode, the other end of the first adjustable resistor RP1 is connected with a non-inverting input end 3 pin of the operational amplifier A2 and one end of the first resistor R3, one end of the second adjustable resistor RP2 is connected with one end of the second resistor R4 and a reverse input end 2 pin of the operational amplifier A2, the other end of the first resistor R3 is connected with the other end of the second resistor R4, a negative power input end 4 pin of the operational amplifier A2, a negative power input end of the buzzer B and a negative power input end of the relay K1 are connected, an output end 6 pin of the operational amplifier A2 is connected with a base electrode of the PNP triode Q1, and a collector of the PNP triode Q1 is connected with a positive power input end of the buzzer B and a positive power input end of the relay K1.
As shown in fig. 1 and 2, the power input ends 1 and 2 pins of the power module A1 and the two poles of the alternating current 220V power supply are respectively connected by wires, the power output ends 3 and 4 pins of the power module A1 and the other end of the power input end thermistor RT and the other end of the adjustable resistor RP of the detection circuit, the 7 and 4 pins of the power input end operational amplifier A2 of the comparison circuit and the two poles of the storage battery G1 are respectively connected by wires, the other end of the signal output end resistor R2 of the detection circuit and the other end of the signal input end adjustable resistor RP2 of the comparison circuit are respectively connected by wires, and the control contact end and the normally open contact end of the signal control end relay K1 of the comparison circuit and the lower two contacts of the experimental button S1 of the circuit breaker DL in the ring main unit are respectively connected by wires.
As shown in fig. 1 and 2, after the 220V ac power enters the power input end of the power module A1, the power output end of the power module A1 outputs a stable dc12V power to enter the power input end of the detection circuit and the comparison circuit (meanwhile, the storage battery G1 is charged, and after the main power switch is turned off, the detection circuit and the comparison circuit can be normally powered on), and the above circuits are powered on to work. In the utility model, after the nut 2 heats when the load switch works, the temperature of the nut can act on the thermistor RT, the resistance value of the thermistor RT is smaller when the temperature is higher, the voltage division of the adjustable resistor RP is higher when the temperature is higher, the 12V power supply is divided by the thermistor RT and the adjustable resistor RP, the voltage signals of the resistor R2 and the adjustable resistor RP3 which are subjected to current limiting and voltage reduction enter the voltmeter V are relatively high (the voltage number representing the temperature data displayed by the voltmeter V is relatively high, such as 4500 representing the temperature of 45 ℃); the lower the temperature is, the larger the resistance value of the thermistor RT is, the lower the voltage division of the adjustable resistor RP is, the voltage division of the 12V power supply is realized through the thermistor RT and the adjustable resistor RP, the current-limiting voltage reduction of the resistor R2 and the adjustable resistor RP3 is realized, and the voltage signal of the voltage meter V is relatively low (the voltage number representing the temperature data displayed by the voltage meter V is relatively low, such as 3500, the temperature of the ammeter is 35 ℃); the operator can intuitively understand the specific temperature of the nut 2 (i.e. the temperature data of the load switch) by observing the display number of the voltmeter V.
As shown in fig. 1 and 2, when the temperature at the position of the nut 2 is relatively low and is lower than the defined temperature threshold (for example, lower than 50 ℃), the voltage signal output by the resistor R2 is divided by the adjustable resistor RP2 and the resistor R4, so that the voltage at the 2-pin voltage at the inverting input end of the op-amp A2 is lower than the voltage at the 3-pin voltage at the non-inverting input end (the 3-pin voltage is obtained by dividing the voltage by the adjustable resistor RP1 and the resistor R3), the 6-pin output of the op-amp A2 is at a high level, and the relay K1 cannot be electrically attracted, which represents that the temperature at the position of the nut is normal. When the temperature at the position of the nut 2 is relatively high and higher than a limiting temperature threshold (such as higher than 50 ℃), a voltage signal output by the resistor R2 is divided by the adjustable resistor RP2 and the resistor R4, the voltage of the pin 2 at the inverting input end of the operational amplifier A2 is higher than the voltage of the pin 3 at the non-inverting input end, the pin 6 of the operational amplifier A2 outputs a low level to enter the base electrode of the PNP triode Q1, the PNP triode Q1 is conducted with the collector electrode to output a high level to enter the relay K1 and the positive power supply input end of the buzzer B, the buzzer B obtains an electric sound to prompt that the temperature of workers in the field is out of standard, and the electrical equipment at the load end or in the ring main unit is detected in time, so that safe power supply is ensured. After the control contact end and the normally open contact end of the relay K1 are closed, the two contacts under the experiment button S1 of the circuit breaker DL are closed, so that the circuit breaker can trip, and accidents such as electric fire and the like caused by the fact that a load end cannot timely disconnect a power supply due to short circuit and the like are prevented. In the novel production, a worker can set a temperature alarm threshold value by adjusting the resistance value of the adjustable resistor RP2, when the resistance value of the adjustable resistor RP2 is adjusted to be relatively large, the voltage division of the resistor is large, and the voltage division of the resistor R4 is relatively small, so that the higher the temperature of a nut is detected by the follow-up thermistor RT, the smaller the resistance value of the thermistor RT is, the voltage signal of 2 pins entering the operational amplifier A2 is higher than 3 pins, namely the novel temperature alarm threshold value is higher; the resistance value of the adjustable resistor RP2 is adjusted to be relatively small, the voltage division of the resistor R4 is relatively large, so that when the temperature of a nut detected by the follow-up thermistor RT is lower and the resistance value of the thermistor RT is relatively large, the voltage signal of 2 pins entering the operational amplifier A2 is higher than 3 pins, that is, the temperature alarm threshold value of the temperature alarm device is lowered (specific adjustment, and a technician sets the alarm threshold value according to the requirement). During production and shaping, a technician is combined with other mercury thermometers and the like to determine the resistance value of the adjustable resistor RP3, the temperature sensing head of the thermometer contacts the nut, then the resistance value of the adjustable resistor RP3 is adjusted to be larger or smaller according to the temperature reading of the mercury switch (the resistance value is adjusted to be relatively larger, then the voltage signal entering the voltmeter V is relatively lower, and the opposite is relatively larger), and when the number (such as display 5830) displayed by the voltmeter V is consistent with the reading of the mercury switch (such as 58.3 ℃), the resistance value of the adjustable resistor RP3 is adjusted in place. In fig. 2, relay K1 is a DC12V relay; thermistor RT is a negative temperature coefficient thermistor of model NTC 103D; the model A2 of the operational amplifier is UA742; the resistance values of the resistors R2, R3 and R4 are 47K, 11K and 10K respectively; the model Q1 of the PNP triode is 9012; the buzzer B is an active continuous sound buzzer alarm finished product with the model of FMDC 12V; the adjustable resistance RP (adjusted to 42.1K in this example), RP1 (adjusted to 32.4K in this example), RP2 (adjusted to 6.8K in this example), RP3 (adjusted to 42.1K in this example) signals are 470K. The voltmeter V is a DC liquid crystal voltmeter with a measuring range of 24V.
It should be understood by those skilled in the art that although the present disclosure describes embodiments, the embodiments do not include only a single embodiment, and the description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the embodiments in the examples may be combined appropriately to form other embodiments that can be understood by those skilled in the art, so that the scope of the present disclosure is defined by the claims.
Claims (4)
1. The temperature sensor system for the nut type high-voltage switch comprises a power supply module, a ring main unit load switch fixing nut and a storage battery, and is characterized by further comprising a detection circuit and a comparison circuit; the outer side end of the fixing nut is provided with an opening, the detection circuit is matched with a thermistor, and the thermistor is arranged in the opening of the fixing nut; the power module, the storage battery, the detection circuit and the comparison circuit are arranged in the element box, the power output end of the power module is electrically connected with the detection circuit and the power input end of the comparison circuit, the signal output end of the detection circuit is electrically connected with the signal input end of the comparison circuit, and the signal control end of the comparison circuit is electrically connected with the lower two contacts of the experimental button of the circuit breaker in the ring main unit respectively.
2. A temperature sensor system for a nut-type high voltage switch as claimed in claim 1, wherein the thermistor is a negative temperature coefficient thermistor.
3. The temperature sensor system for a nut type high voltage switch according to claim 1, wherein the detecting circuit comprises a resistor, a liquid crystal voltage display meter and an adjustable resistor which are electrically connected, one end of the thermistor is connected with one end of the resistor, one end of the first adjustable resistor is connected with one end of the second adjustable resistor, the other end of the second adjustable resistor is connected with the positive electrode of the voltmeter, and the negative electrode of the voltmeter is connected with the other end of the adjustable resistor.
4. The temperature sensor system for the nut-type high-voltage switch according to claim 1, wherein the comparison circuit comprises an operational amplifier, an adjustable resistor, a relay and a buzzer which are electrically connected, one end of the first adjustable resistor is connected with an anode power input end of the operational amplifier and a PNP triode emitter, the other end of the first adjustable resistor is connected with a non-inverting input end of the operational amplifier and one end of the first resistor, one end of the second adjustable resistor is connected with one end of the second resistor and a reverse input end of the operational amplifier, the other end of the first resistor is connected with the other end of the second resistor, the anode power input end of the operational amplifier, the anode power input end of the buzzer and the anode power input end of the relay are connected, the output end of the operational amplifier is connected with a PNP triode base electrode, and a collector of the PNP triode is connected with the anode power input end of the buzzer and the anode power input end of the relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320596932.1U CN219624929U (en) | 2023-03-24 | 2023-03-24 | Temperature sensor system for nut type high-voltage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320596932.1U CN219624929U (en) | 2023-03-24 | 2023-03-24 | Temperature sensor system for nut type high-voltage switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219624929U true CN219624929U (en) | 2023-09-01 |
Family
ID=87773551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320596932.1U Active CN219624929U (en) | 2023-03-24 | 2023-03-24 | Temperature sensor system for nut type high-voltage switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219624929U (en) |
-
2023
- 2023-03-24 CN CN202320596932.1U patent/CN219624929U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110967643B (en) | Thermal runaway detection circuit and method | |
| CN101853554A (en) | Fireproofing pre-warning monitoring method for unmanned base station and system thereof | |
| CN113437371A (en) | Early warning system and early warning method for thermal runaway of lithium ion battery of new energy automobile | |
| CN109613426B (en) | Aging diagnosis method for plum blossom contact of high-voltage circuit breaker | |
| CN104655907A (en) | Assembled-battery voltage detection device | |
| CN219624929U (en) | Temperature sensor system for nut type high-voltage switch | |
| CN116345412A (en) | Join in marriage detection protector and join in marriage net cubical switchboard of net cubical switchboard operating coil | |
| CN110702246A (en) | Method and system for monitoring connection state of main loop of switch cabinet | |
| CN110515006A (en) | A kind of battery pack, the management method of battery pack and vehicle | |
| CN206378569U (en) | A kind of voltage relay abnormal detector | |
| CN216014048U (en) | Quiescent current test system for whole automobile and controller | |
| CN204882822U (en) | Killer switch state detection device | |
| CN215178248U (en) | Wireless temperature measurement early warning system | |
| CN102998586A (en) | Power system fault indicator | |
| CN210690788U (en) | Novel direct current traction power supply negative pole unit frame leak test and protection device | |
| CN208971247U (en) | The long-range integrated monitoring device of DC power supply | |
| CN208092163U (en) | A kind of EKL5-D-Q novel cables type accident indicator | |
| CN208369206U (en) | A kind of arc light protective device with TEV detection | |
| CN207518256U (en) | Triple negative ground voltage protections | |
| CN219086791U (en) | Electrical equipment failure detection protection control system | |
| CN214375972U (en) | Take infrared temperature monitoring type moulded case circuit breaker controller | |
| CN201638340U (en) | Fire prevention pre-alarm device for machine room of base station | |
| CN216598971U (en) | Cable head temperature sensing protection device | |
| CN211626827U (en) | Mounting bracket of detectable battery weeping | |
| CN215527671U (en) | Fuse temperature detection system and car |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |