CN202710196U - Heating temperature difference warning device for closed switch cabinet - Google Patents
Heating temperature difference warning device for closed switch cabinet Download PDFInfo
- Publication number
- CN202710196U CN202710196U CN201220387851.2U CN201220387851U CN202710196U CN 202710196 U CN202710196 U CN 202710196U CN 201220387851 U CN201220387851 U CN 201220387851U CN 202710196 U CN202710196 U CN 202710196U
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- cabinet
- temperature
- air temperature
- temperature difference
- threshold value
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Abstract
The utility model provides a heating temperature difference warning device for a closed switch cabinet. The warning device comprises an inside-cabinet air temperature measuring probe, an outside-cabinet air temperature measuring probe, a temperature comparator, an early-warning signal light, and a warning bell, wherein the in-cabinet air temperature measuring probe is used for measuring the air temperature inside the closed switch cabinet; the out-cabinet air temperature measuring probe is used for measuring the air temperature outside the closed switch cabinet; the temperature comparator is used for comparing the temperature difference of the air inside and outside the cabinet measured by the inside-cabinet air temperature measuring probe and the outside-cabinet air temperature measuring probe with a preset warning threshold value, and sends a driving signal when the temperature difference of the air inside and outside the cabinet exceeds the warning threshold value; the early-warning signal light is connected with the temperature comparator, receives the driving signal sent by the temperature comparator and then sends out an early-warning signal; and the warning bell is connected with the temperature comparator, receives the driving signal sent by the temperature comparator and then sends out an warning signal. According to the warning device provided by the utility model, the internal heating state of the cabinet is judged with the consideration of the influence of external ambient temperature, the overheating warning is realized, the monitoring method is more accurate and effective, fewer sensors are required, and the installation is simple and convenient.
Description
Technical field
The utility model relates to the power technology field, relates in particular to a kind of enclosed switchgear heating temperature difference alarm device.
Background technology
Because electric load progressively increases, the reason such as large or joint loose contact produces heating to the switch cubicle of transformer station owing to load current, and the hot stall accident that causes is comparatively serious.
Mostly be directly at the joint area mounting temperature sensor for the temperature measuring equipment of switch cubicle at present, perhaps the mode such as air themperature in the monitoring switch cabinet.Yet, only can not reflect the degree of heat of switch cubicle integral body at the joint area mounting temperature sensor, and the temperature sensor quantity that this mode needs is more, cost is higher.In addition, because switch cubicle the degree of heat and environment temperature relation are very large, air themperature can not accurately be judged the time of day of switch cubicle heating in the monitoring switch cabinet, wrong report often can occur.
Therefore, the true temperature in the monitoring switch cabinet how accurately, and carry out the temperature difference and report to the police, effectively avoiding the hot stall accident is the technical matters that needs to be resolved hurrily.
The utility model content
The utility model provides a kind of enclosed switchgear heating temperature difference alarm device, it is based on the switch cubicle inner air and outer air temperature difference, monitor simultaneously air themperature and cabinet outer air temperature in the cabinet, can Accurate Prediction and judge the heating order of severity of inside switch cabinet, thus realize temperature alarm.
A kind of enclosed switchgear heating temperature difference alarm device that the utility model provides comprises:
Place in the described enclosed switchgear, be used for measuring the interior air temperature probe of cabinet of the air themperature in the described enclosed switchgear;
Place outside the described enclosed switchgear, be used for measuring the cabinet outer air temperature probe of the outer air themperature of described enclosed switchgear;
Be connected with air temperature probe in the described cabinet and described cabinet outer air temperature probe, be used for air temperature probe in the described cabinet and described cabinet outer air temperature probe the cabinet inner air and outer air temperature difference that measures and the alarm threshold value that presets are compared, when cabinet inner air and outer air temperature difference surpasses described alarm threshold value, send the temperature comparator that drives signal;
Be connected with described temperature comparator, receive the early warning signal lamp that sends early warning signal behind the driving signal that described temperature comparator sends;
Be connected with described temperature comparator, receive the emergency alarm bell that sends alerting signal behind the driving signal that described temperature comparator sends.
Wherein, described temperature comparator comprises:
Set the alarm threshold value setting module of alarm threshold value;
Be connected the temperature comparison module that the alarm threshold value that more described cabinet inner air and outer air temperature difference and described alarm threshold value setting module preset compares with described alarm threshold value setting module;
Be connected air themperature in the display switch cabinet, switch cubicle outer air temperature, and the temperature display module of cabinet inner air and outer air temperature difference with described temperature comparison module.
Wherein, the air temperature probe adopts assembled K type thermopair in the described cabinet, and its temperature-measuring range is at-10 ~ 200 degrees centigrade, and its thermal inertia time constant is less than 90s, and its thermometric limit of intrinsic error is in ± 1%.
Wherein, described cabinet outer air temperature probe adopts assembled K type thermopair, and its temperature-measuring range is at-10 ~ 200 degrees centigrade, and its thermal inertia time constant is less than 90s, and its thermometric limit of intrinsic error is in ± 1%.
Wherein, when described temperature comparator surpasses within 0 ~ 20 degree centigrade of the described alarm threshold value in described cabinet inner air and outer air temperature difference, send the driving signal to described early warning signal lamp, drive described early warning signal lamp lamp bright.
Wherein, described temperature comparator surpasses described alarm threshold value more than 5 ~ 15 degrees centigrade the time in described cabinet inner air and outer air temperature difference, sends the driving signal to described emergency alarm bell, drives described emergency alarm bell and sends the warning the tinkle of bells.
Because there are certain funtcional relationship in the Air Temperature Difference that switch cubicle is inside and outside and the heating power of switch cubicle, when the switch cubicle heating power surpasses maximum permission dissipated power, air themperature raises unusually in the switch cubicle, can predict and judge the heating order of severity of inside switch cabinet by the difference in air temperature inside and outside the cabinet, so the enclosed switchgear heating temperature difference alarm device that the utility model provides is monitored air themperature and cabinet outer air temperature in the cabinet simultaneously, at the judge inner heat state of switch cubicle of the situation of having considered the ambient temperature impact, realize temperature alarm, monitoring method is accurate and effective more, the number of sensors that needs is few, simple installation.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of a kind of enclosed switchgear heating temperature difference alarm device that Fig. 1 provides for the utility model;
The workflow schematic diagram of a kind of enclosed switchgear heating temperature difference alarm device that Fig. 2 provides for the utility model;
The circuit theory diagrams of a kind of enclosed switchgear heating temperature difference alarm device that Fig. 3 provides for the utility model.
Embodiment
The technical scheme that the utility model provides is: cabinet outer air temperature probe is installed outside enclosed switchgear, is used for measuring cabinet outer air temperature; Air temperature probe in the cabinet is installed in enclosed switchgear, is used for measuring air themperature in the cabinet; Then air themperature in the cabinet and cabinet outer air temperature are transferred to temperature comparator by signal.Temperature comparator will measure in the cabinet of gained air themperature and cabinet outer air temperature do poor after, with the alarm threshold value of this difference and setting relatively, if difference surpasses threshold value, then send alerting signal or the warning of trigger alarm bell by temperature comparator.If the temperature difference is below threshold value, then switch cabinet temperature is in normal condition, does not report to the police.
The setting principle of alarm threshold value is as follows:
The dissipated power P that allows under the definition switch cubicle full load conditions, alarm threshold value T.
Accounting equation is as follows:
5.103×10
-8S[(273+t
1)
4-(273+t
2)
4]+1.86S(t
1-t
2)
1.25-P=0
Suppose cabinet shell temperature-averaging, according to switch cubicle area of dissipation S, cabinet outer air temperature t
2Can calculate cabinet shell temperature t
1, the computing formula of alarm threshold value T is:
T=2(t
1-t
2)+3
Need to prove, set the alarm threshold value except adopting above-mentioned computing method, can also set alarm threshold value with reference to the cabinet inner air and outer air temperature difference in the normal operation rated load situation according to transformer station's long-time running experience, do not repeat them here.
Below will describe the implementation procedure of a kind of enclosed switchgear heating temperature difference alarm device that the utility model provides in detail.
Referring to Fig. 1, the structural representation of a kind of enclosed switchgear heating temperature difference alarm device that provides for the utility model.
A kind of enclosed switchgear heating temperature difference alarm device that the utility model that the present embodiment provides provides comprises:
Place in the described enclosed switchgear, be used for measuring the interior air temperature probe 1 of cabinet of the air themperature in the described enclosed switchgear;
Place outside the described enclosed switchgear, be used for measuring the cabinet outer air temperature probe 2 of the outer air themperature of described enclosed switchgear;
Be connected with air temperature probe 1 in the described cabinet and described cabinet outer air temperature probe 2, be used for air temperature probe 1 in the described cabinet and described cabinet outer air temperature probe 2 the cabinet inner air and outer air temperature difference that measures and the alarm threshold value that presets are compared, when cabinet inner air and outer air temperature difference surpasses described alarm threshold value, send the temperature comparator 3 that drives signal;
Be connected with described temperature comparator 3, receive the early warning signal lamp 4 that sends early warning signal behind the driving signal that described temperature comparator 3 sends;
Be connected with described temperature comparator 3, receive the emergency alarm bell 5 that sends alerting signal behind the driving signal that described temperature comparator 3 sends.
Wherein, described temperature comparator 3 comprises:
Set the alarm threshold value setting module 31 of alarm threshold value;
Be connected the temperature comparison module 32 that the alarm threshold value that more described cabinet inner air and outer air temperature difference and described alarm threshold value setting module 31 preset compares with described alarm threshold value setting module 31;
Be connected air themperature in the display switch cabinet, switch cubicle outer air temperature, and the temperature display module 33 of cabinet inner air and outer air temperature difference with described temperature comparison module 32.
In specific implementation, air temperature probe 1 adopts assembled K type thermopair in the described cabinet, and its temperature-measuring range is at-10 ~ 200 degrees centigrade, and its thermal inertia time constant is less than 90s, and its thermometric limit of intrinsic error is in ± 1%.
Described cabinet outer air temperature probe 2 adopts assembled K type thermopair, and its temperature-measuring range is at-10 ~ 200 degrees centigrade, and its thermal inertia time constant is less than 90s, and its thermometric limit of intrinsic error is in ± 1%.
When temperature comparator 3 finds that cabinet inner air and outer air temperature difference surpasses described alarm threshold value certain limit, can send the driving signal to early warning signal lamp 4, also can send the driving signal to emergency alarm bell 5.
Referring to Fig. 2, the workflow diagram of a kind of enclosed switchgear heating temperature difference alarm device that provides for the utility model.
Referring to Fig. 3, the circuit theory diagrams of a kind of enclosed switchgear heating temperature difference alarm device that provides for the utility model.
The course of work of a kind of enclosed switchgear heating temperature difference alarm device that the utility model provides is described below in conjunction with Fig. 2 and Fig. 3.
Concrete, according to theory calculating or operating experience alarm threshold value is set first, then record respectively cabinet inner air and outer air temperature by air temperature probe in cabinet outer air temperature probe and the cabinet.The distance of cabinet outer air temperature probe and switch cabinet face should remain on more than the 10-50cm.
Transfer signals to temperature comparator after the air temperature probe records respectively cabinet inner air and outer air temperature in cabinet outer air temperature probe and the cabinet.Temperature comparator is air themperature, cabinet outer air temperature and show the difference of two temperatures in the display case simultaneously, and the alarm threshold value with this difference and setting compares simultaneously, attonity when difference is no more than alarm threshold value.If difference surpasses setting threshold, the temperature comparison means sends early warning or alerting signal.
Concrete, described temperature comparator 3 sends the driving signal to described early warning signal lamp 4 when (visual installation site and tolerance limit are adjusted setting threshold) within described cabinet inner air and outer air temperature difference surpasses 0 ~ 20 degree centigrade of described alarm threshold value, drive described early warning signal lamp 4 lamps bright.
For example, when cabinet inner air and outer air temperature difference surpassed 3 degrees centigrade of alarm threshold values that described alarm threshold value setting module 31 sets, temperature comparator 3 sent the driving signal to described early warning signal lamp 4, drives described early warning signal lamp lamp bright.
Perhaps, when cabinet inner air and outer air temperature difference surpassed 10 degrees centigrade of alarm threshold values that described alarm threshold value setting module 31 sets, temperature comparator 3 sent the driving signal to described early warning signal lamp 4, drives described early warning signal lamp lamp bright.
Certainly, when described temperature comparator 3 surpasses 5 ~ 15 degrees centigrade of described alarm threshold values (visual installation site and tolerance limit are adjusted setting threshold) in described cabinet inner air and outer air temperature difference, when above, send the driving signal to described emergency alarm bell 5, drive described emergency alarm bell and send the warning the tinkle of bells.
For example, when cabinet inner air and outer air temperature difference surpassed 5 degrees centigrade of alarm threshold values that described alarm threshold value setting module 31 sets, temperature comparator 3 sent the driving signal to described emergency alarm bell 5, drives described emergency alarm bell 5 and sends the warning the tinkle of bells.
Perhaps, when cabinet inner air and outer air temperature difference surpassed 10 degrees centigrade of alarm threshold values that described alarm threshold value setting module 31 sets, temperature comparator 3 sent the driving signal to described early warning signal lamp 4, drives described early warning signal lamp lamp bright.
When cabinet inner air and outer air temperature difference surpasses described alarm threshold value 5-15 degree centigrade (visual installation site and tolerance limit are adjusted setting threshold), in this scope, can be according to setting, temperature comparator 3 both can be to emergency alarm bell 5, also can send the driving signal to early warning signal lamp 4, operating personnel can also carry out other settings according to the actual requirements, as long as can reach early warning or warning effect.
Because there are certain funtcional relationship in the Air Temperature Difference that switch cubicle is inside and outside and the heating power of switch cubicle, when the switch cubicle heating power surpasses maximum permission dissipated power, air themperature raises unusually in the switch cubicle, can predict and judge the heating order of severity of inside switch cabinet by the difference in air temperature inside and outside the cabinet, so the enclosed switchgear heating temperature difference alarm device that the utility model provides is monitored air themperature and cabinet outer air temperature in the cabinet simultaneously, at the judge inner heat state of switch cubicle of the situation of having considered the ambient temperature impact, realize temperature alarm, monitoring method is accurate and effective more, the number of sensors that needs is few, simple installation.In addition, the applicability of a kind of enclosed switchgear heating temperature difference alarm device that the utility model provides is very wide, goes for various types of enclosed switchgears.
It should be noted that; what the utility model was described is a kind of a kind of product form of enclosed switchgear heating temperature difference alarm device; other satisfies the product of structure described in the utility model; not affect the factor of product performance not identical even material, device name, outward appearance, device are put sequential scheduling, still belongs to the scope of the utility model protection.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (6)
1. an enclosed switchgear heating temperature difference alarm device is characterized in that, comprising:
Place in the described enclosed switchgear, be used for measuring the interior air temperature probe of cabinet of the air themperature in the described enclosed switchgear;
Place outside the described enclosed switchgear, be used for measuring the cabinet outer air temperature probe of the outer air themperature of described enclosed switchgear;
Be connected with air temperature probe in the described cabinet and described cabinet outer air temperature probe, be used for air temperature probe in the described cabinet and described cabinet outer air temperature probe the cabinet inner air and outer air temperature difference that measures and the alarm threshold value that presets are compared, when cabinet inner air and outer air temperature difference surpasses described alarm threshold value, send the temperature comparator that drives signal;
Be connected with described temperature comparator, receive the early warning signal lamp that sends early warning signal behind the driving signal that described temperature comparator sends;
Be connected with described temperature comparator, receive the emergency alarm bell that sends alerting signal behind the driving signal that described temperature comparator sends.
2. enclosed switchgear heating temperature difference alarm device as claimed in claim 1 is characterized in that, described temperature comparator comprises:
Set the alarm threshold value setting module of alarm threshold value;
Be connected the temperature comparison module that the alarm threshold value that more described cabinet inner air and outer air temperature difference and described alarm threshold value setting module preset compares with described alarm threshold value setting module;
Be connected air themperature in the display switch cabinet, switch cubicle outer air temperature, and the temperature display module of cabinet inner air and outer air temperature difference with described temperature comparison module.
3. enclosed switchgear as claimed in claim 2 heating temperature difference alarm device, it is characterized in that, the air temperature probe adopts assembled K type thermopair in the described cabinet, and its temperature-measuring range is at-10 ~ 200 degrees centigrade, its thermal inertia time constant is less than 90s, and its thermometric limit of intrinsic error is in ± 1%.
4. enclosed switchgear as claimed in claim 2 heating temperature difference alarm device, it is characterized in that, described cabinet outer air temperature probe adopts assembled K type thermopair, and its temperature-measuring range is at-10 ~ 200 degrees centigrade, its thermal inertia time constant is less than 90s, and its thermometric limit of intrinsic error is in ± 1%.
5. such as claim 3 or 4 described enclosed switchgear heating temperature difference alarm devices, it is characterized in that, when described temperature comparator surpasses within 0 ~ 20 degree centigrade of the described alarm threshold value in described cabinet inner air and outer air temperature difference, send the driving signal to described early warning signal lamp, drive described early warning signal lamp lamp bright.
6. such as claim 3 or 4 described enclosed switchgear heating temperature difference alarm devices, it is characterized in that, described temperature comparator surpasses described alarm threshold value more than 5 ~ 15 degrees centigrade the time in described cabinet inner air and outer air temperature difference, send the driving signal to described emergency alarm bell, drive described emergency alarm bell and send the warning the tinkle of bells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220387851.2U CN202710196U (en) | 2012-08-07 | 2012-08-07 | Heating temperature difference warning device for closed switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220387851.2U CN202710196U (en) | 2012-08-07 | 2012-08-07 | Heating temperature difference warning device for closed switch cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN202710196U true CN202710196U (en) | 2013-01-30 |
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ID=47590487
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220387851.2U Expired - Lifetime CN202710196U (en) | 2012-08-07 | 2012-08-07 | Heating temperature difference warning device for closed switch cabinet |
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| CN (1) | CN202710196U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035853A (en) * | 2013-03-07 | 2014-09-10 | 华为技术有限公司 | Temperature monitoring system and temperature monitoring method |
| CN104089711A (en) * | 2014-06-18 | 2014-10-08 | 国家电网公司 | Secondary side current wiring terminal overheating alarm apparatus of switch cabinet |
| CN105091724A (en) * | 2015-03-05 | 2015-11-25 | 浙江吉利罗佑发动机有限公司 | LVDT measuring head rapid calibration tool and calibration method |
| CN106610321A (en) * | 2016-12-27 | 2017-05-03 | 上海应用技术大学 | Electrical device temperature monitoring device |
| CN113346611A (en) * | 2021-04-26 | 2021-09-03 | 云南电网有限责任公司文山供电局 | High-voltage switch cabinet multidimensional state intelligent monitoring system and method |
| CN114093144A (en) * | 2021-10-28 | 2022-02-25 | 许昌许继软件技术有限公司 | Switch cabinet temperature early warning method and system |
| CN114487681A (en) * | 2022-02-15 | 2022-05-13 | 江苏商贸职业学院 | High-frequency transformer abnormal heat generation diagnosis system based on Internet of things |
| CN116519165A (en) * | 2023-07-03 | 2023-08-01 | 中建三局集团华南有限公司 | Overheat detection alarm device for switching power supply |
-
2012
- 2012-08-07 CN CN201220387851.2U patent/CN202710196U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035853A (en) * | 2013-03-07 | 2014-09-10 | 华为技术有限公司 | Temperature monitoring system and temperature monitoring method |
| WO2014135027A1 (en) * | 2013-03-07 | 2014-09-12 | 华为技术有限公司 | Temperature monitoring system and temperature monitoring method |
| CN104089711A (en) * | 2014-06-18 | 2014-10-08 | 国家电网公司 | Secondary side current wiring terminal overheating alarm apparatus of switch cabinet |
| CN105091724A (en) * | 2015-03-05 | 2015-11-25 | 浙江吉利罗佑发动机有限公司 | LVDT measuring head rapid calibration tool and calibration method |
| CN106610321A (en) * | 2016-12-27 | 2017-05-03 | 上海应用技术大学 | Electrical device temperature monitoring device |
| CN106610321B (en) * | 2016-12-27 | 2019-01-22 | 上海应用技术大学 | A kind of electrical equipment temperature monitoring device |
| CN113346611A (en) * | 2021-04-26 | 2021-09-03 | 云南电网有限责任公司文山供电局 | High-voltage switch cabinet multidimensional state intelligent monitoring system and method |
| CN114093144A (en) * | 2021-10-28 | 2022-02-25 | 许昌许继软件技术有限公司 | Switch cabinet temperature early warning method and system |
| CN114093144B (en) * | 2021-10-28 | 2023-09-08 | 许昌许继软件技术有限公司 | Switch cabinet temperature early warning method and system |
| CN114487681A (en) * | 2022-02-15 | 2022-05-13 | 江苏商贸职业学院 | High-frequency transformer abnormal heat generation diagnosis system based on Internet of things |
| CN116519165A (en) * | 2023-07-03 | 2023-08-01 | 中建三局集团华南有限公司 | Overheat detection alarm device for switching power supply |
| CN116519165B (en) * | 2023-07-03 | 2023-08-25 | 中建三局集团华南有限公司 | Overheat detection alarm device for switching power supply |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |
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| CX01 | Expiry of patent term |