CN217283424U - Heating device for heating outdoor terminal box and outdoor terminal box - Google Patents
Heating device for heating outdoor terminal box and outdoor terminal box Download PDFInfo
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- CN217283424U CN217283424U CN202220133240.9U CN202220133240U CN217283424U CN 217283424 U CN217283424 U CN 217283424U CN 202220133240 U CN202220133240 U CN 202220133240U CN 217283424 U CN217283424 U CN 217283424U
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Abstract
The utility model discloses a heating device and outdoor terminal case for be used for heating outdoor terminal case, a serial communication port, include: the mounting plate is used for being mounted on a box body of the outdoor terminal box; a PTC heater assembly mounted on the mounting plate and used to heat the tank. By adopting the PTC heater assembly to heat the box body, the surface of the box body can be kept at a constant temperature, overheating and scorching are avoided, and even if the heating device is damaged, burning caused by short circuit can be avoided, so that the reliability of the heating process is improved.
Description
Technical Field
The utility model relates to a high-tension apparatus's technical field, in particular to a heating device and outdoor terminal case for be used for heating outdoor terminal case.
Background
In the power system, a large number of outdoor terminal boxes are used, and the outdoor terminal boxes are used for monitoring, controlling, automatically protecting and the like high-voltage equipment, so that the requirements on the temperature and the humidity in the box body are high. In particular, moisture, for example, condensation on the tank body, can cause the insulation performance of the tank body to be reduced, which directly threatens the normal operation of the control and monitoring equipment, and further can cause the malfunction or failure of the high-voltage equipment.
In view of the above problems, all outdoor terminal boxes are currently equipped with heaters, but most heaters are controlled by a temperature and humidity controller.
In the use process, when any one of the temperature controller and the heater fails, the heater does not work, and the failure cannot be found in the patrol period of the heater, such as a quarter. Resulting in a quarter of the year, which is at risk of insulation degradation and is extremely hazardous. If the temperature controller fails to work, the heater is thrown for a long time, the temperature in the box body is overhigh until the box body is burnt and insulated, and a great safety accident is caused.
In summary, the above-described method of controlling the temperature and humidity is not highly reliable.
Therefore, how to improve the reliability of heating to ensure the safety of the outdoor terminal box is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a heating device for be used for to outdoor terminal case heating improves the reliability of heating to guarantee the security of outdoor terminal case. Furthermore, the utility model also provides an outdoor terminal box of having above-mentioned heating device.
In order to achieve the above object, the utility model provides a following technical scheme:
a heating device for heating an outdoor terminal box, comprising:
the mounting plate is used for being mounted on a box body of the outdoor terminal box;
a PTC heater assembly mounted on the mounting plate and adapted to heat the tank.
Preferably, in the above heating apparatus, the PTC heater assembly includes:
establish ties in proper order and all install first quick fuse, first PTC heater branch road, second PTC heater branch road and the quick fuse of second on the mounting panel.
Preferably, in the heating apparatus described above, the first PTC heater branch includes:
the temperature control device comprises a first PTC heater and a second PTC heater which are arranged in parallel, wherein the temperature threshold value of the first PTC heater is different from that of the second PTC heater.
Preferably, in the heating apparatus described above, the second PTC heater branch includes:
the temperature threshold of the first PTC heater is the same as that of the fourth PTC heater, and the temperature threshold of the second PTC heater is the same as that of the third PTC heater.
Preferably, in the above heating apparatus, the PTC heater assembly further comprises:
a first voltage dividing resistor connected in parallel with the first PTC heater, a second voltage dividing resistor connected in parallel with the second PTC heater, a third voltage dividing resistor connected in parallel with the third PTC heater, and a fourth voltage dividing resistor connected in parallel with the fourth PTC heater.
Preferably, in the above heating apparatus, the PTC heater assembly further comprises:
a first voltage stabilizing rectifier tube connected in parallel with the first PTC heater and in series with the first voltage dividing resistor;
a second voltage stabilizing rectifier tube connected in parallel with the second PTC heater and in series with the second voltage dividing resistor;
a third voltage-stabilizing rectifier tube connected in parallel with the third PTC heater and in series with the third voltage-dividing resistor;
a fourth voltage regulation rectifier tube connected in parallel with the fourth PTC heater and in series with the fourth voltage dividing resistor.
Preferably, in the above heating apparatus, the PTC heater assembly further comprises:
a first monitoring light emitting tube connected in parallel with the first voltage stabilizing rectifier tube;
a second monitoring light emitting tube connected in parallel with the second voltage stabilizing rectifier tube;
a third monitoring light-emitting tube connected in parallel with the third voltage-stabilizing rectifier tube;
and the fourth monitoring luminous tube is connected with the fourth voltage-stabilizing rectifying tube in parallel.
An outdoor terminal box comprising a heating device for heating the outdoor terminal box, wherein the heating device is any one of the heating devices described above.
Preferably, in the outdoor terminal box, the PTC heater assemblies are uniformly distributed on the box body.
Preferably, in the outdoor terminal box, the heating device is detachably mounted on the box body
The utility model provides a heating device for be used for heating outdoor terminal case heats the box through adopting PTC heater module, can guarantee that the box surface maintains constant temperature, avoids overheated and scorching to even heating device damages the firing that also can not bring because of the short circuit, consequently, has improved heating process's reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of a heating device for heating an outdoor terminal box disclosed in an embodiment of the present invention.
Detailed Description
The utility model discloses a heating device for be used for heating outdoor terminal box improves the reliability of heating to guarantee the security of outdoor terminal box. Furthermore, the utility model also discloses an outdoor terminal box of having above-mentioned heating device.
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 work belong to the protection scope of the present invention.
As shown in fig. 1, the present application discloses a heating apparatus for heating an outdoor terminal box, including a mounting plate for being mounted on a box body of the outdoor terminal box, and a PTC heater assembly mounted on the mounting plate for heating the box body. The PTC heater is characterized in that the PTC heating piece is heated by self-heating after being electrified, so that the resistance value is increased to enter a jump zone, the surface temperature of the PTC heating piece keeps a constant value, and the temperature is only related to the Curie temperature and the applied voltage of the PTC heating piece and is basically unrelated to the ambient temperature. Even in the case of abnormal operation, the input power can be reduced very low due to the regulation of the PTC heater chip itself, and no accident occurs.
Through the setting, the surface of the box body can be kept at a constant temperature, overheating and scorching are avoided, and even if the heating device is damaged, burning caused by short circuit can be avoided, so that the reliability of the heating process is improved.
In a specific embodiment, the PTC heater assembly is provided as a first quick fuse 11, a first PTC heater branch, a second PTC heater branch and a second quick fuse 12, which are connected in series in this order and are all mounted on a mounting plate. By providing two PTC heater branches, one can function properly when the other is damaged.
In one embodiment, the first PTC heater branch may be configured as a first heater and a first voltage dividing resistor connected in parallel and a first voltage stabilizing rectifier tube connected in series with the first voltage dividing resistor, and the first voltage stabilizing rectifier tube is connected with a first monitoring light-emitting tube; the second PTC heater branch is set as a second heater and a second divider resistor connected in parallel and a second voltage-stabilizing rectifier tube connected in series with the second divider resistor, and the second voltage-stabilizing rectifier tube is connected with the second monitoring luminous tube.
When the rectifier works, taking the example that the resistors heated by the first PTC heater and the second PTC heater are both 500 ohms, the first divider resistor and the second divider resistor are both 200 kilohms, and the breakdown voltages of the first voltage-stabilizing rectifier tube and the second voltage-stabilizing rectifier tube are both 400 volts:
when the device works normally, the first PTC heater and the second PTC heater distribute voltage according to the resistors, namely, the first detection light-emitting tube and the second detection light-emitting tube bear a part of voltage, and the first monitoring light-emitting tube and the second monitoring light-emitting tube both emit light normally at the moment.
When the first PTC heater is in an open circuit, the resistance of the second PTC heater can be ignored relative to the first voltage dividing resistance, so the first monitoring luminous tube of the first PTC heater which is in the open circuit can be very bright, and the voltage divided by the second PTC heater is too small, so the second monitoring luminous tube can not emit light, and at the moment, the two heaters do not work.
When the first PTC heater is in short circuit, the voltage is just opposite to the voltage, so the second PTC heater is divided into full voltage, the second monitoring luminous tube of the second PTC heater is very bright, the first monitoring luminous tube is turned off, at the moment, the first PTC heater does not work, and the second PTC heater bears twice the voltage of normal work and can rapidly generate heat.
In combination with the above core method, as shown in fig. 1, in another embodiment, the first PTC heater branch comprises: the first PTC heater 21 and the second PTC heater 22 are arranged in parallel, and the temperature threshold of the first PTC heater 21 and the temperature threshold of the second PTC heater 22 are different. And the second PTC heater branch comprises: the temperature threshold of the third PTC heater 23 is different from that of the fourth PTC heater 24, specifically, the temperature threshold of the first PTC heater 21 is the same as that of the fourth PTC heater 24 and is 70 ℃, and the temperature threshold of the second PTC heater 22 is the same as that of the third PTC heater 23 and is 60 ℃.
In the scheme, a mode that two branches are connected in series and each branch is set to be connected with two heaters in parallel is adopted, so that the impedance cannot be greatly reduced due to the short circuit of any heater, and the safety of a power supply is ensured; any one of the heaters fails and is opened, and the other three heaters still work, so that the terminal box is ensured to be in a state with the heaters, and the problem that the terminal box cannot be heated due to the damage of the heaters in the prior art is solved.
In addition, the four PTC heaters with different temperature thresholds are connected in series and in parallel, and the characteristics of the PTC heaters are combined, so that the total power is high when the PTC heaters are at low temperature; and a flexible transition with reduced total power at high temperatures.
In practice, the PTC heater assembly further comprises a first voltage dividing resistor 31 connected in parallel with the first PTC heater 21, a second voltage dividing resistor 32 connected in parallel with the second PTC heater 22, a third voltage dividing resistor 33 connected in parallel with the third PTC heater 23, and a fourth voltage dividing resistor 34 connected in parallel with the fourth PTC heater 24. Further, the PTC heater assembly further comprises: a first voltage stabilizing rectifier tube 41 connected in parallel with the first PTC heater 21 and in series with the first voltage dividing resistor 31; a second voltage-stabilizing rectifier tube 42 connected in parallel with the second PTC heater 22 and in series with the second voltage-dividing resistor 32; a third voltage-stabilizing rectifying tube 43 connected in parallel to the third PTC heater 23 and in series to the third voltage-dividing resistor 33; a fourth voltage regulation rectifier 44 connected in parallel with the fourth PTC heater 24 and in series with the fourth voltage dividing resistor 34.
Further, the PTC heater assembly further comprises: a first monitoring arc tube 51 connected in parallel with the first voltage stabilizing rectifier tube 41; a second monitoring luminous tube 52 connected in parallel with the second voltage stabilizing rectifier tube 42; a third monitoring luminous tube 53 connected in parallel with the third voltage stabilizing rectifier tube 43; and a fourth monitoring light-emitting tube 54 connected in parallel with the fourth voltage-stabilizing rectifier tube 44.
The voltage of the monitoring luminous tube can be divided by arranging the voltage dividing resistor, so that the normal work of the monitoring luminous tube is ensured and the monitoring luminous tube is protected.
The voltage stabilizing rectifier tube is arranged to stabilize voltage and rectify voltage, that is, to convert ac into dc, and those skilled in the art can understand that the structure and function of the voltage stabilizing rectifier tube are known in the prior art, and are not limited herein.
The core of the application lies in the connection relationship of the components in the PTC heater assembly, and the four PTC heaters make the total power large when the PTC heaters are at low temperature; and a flexible transition with reduced total power at high temperatures.
For a specific operation and a damaged connection circuit, reference is made to the above operation, which is not described in detail here.
In addition, this application still discloses an outdoor terminal box, including being used for the heating device to the heating of outdoor terminal box, wherein, this a heating device for heating outdoor terminal box is the heating device who is used for heating outdoor terminal box that discloses in the above-mentioned embodiment, consequently, has this an outdoor terminal box who is used for the heating device to the heating of outdoor terminal box also to have all above-mentioned technological effects, no longer gives unnecessary details one by one here.
The PTC heater unit of the outdoor terminal box disclosed in this application is in evenly distributed on the box to local high temperature is gone up to the avoiding box, guarantees that box each department can steadily heat. In particular, the heaters of the PTC heater assembly may be distributed on various sides of the tank.
Specifically, heating device detachable in this application installs on the box to in maintain and change heating device. The connection mode of the heating device and the box body can be threaded connection, clamping connection or bonding connection, and the detachable connection mode is within the protection range.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A heating device for heating an outdoor terminal box, comprising:
the mounting plate is used for being mounted on a box body of the outdoor terminal box;
a PTC heater assembly mounted on the mounting plate and used to heat the tank; the PTC heater assembly includes:
the first quick fuse, the first PTC heater branch, the second PTC heater branch and the second quick fuse are sequentially connected in series and are all installed on the mounting plate.
2. The heating device of claim 1, wherein the first PTC heater branch comprises:
the temperature control device comprises a first PTC heater and a second PTC heater which are arranged in parallel, wherein the temperature threshold value of the first PTC heater is different from that of the second PTC heater.
3. The heating device of claim 2, wherein the second PTC heater branch comprises:
the temperature threshold of the first PTC heater is the same as that of the fourth PTC heater, and the temperature threshold of the second PTC heater is the same as that of the third PTC heater.
4. The heating device of claim 3, wherein the PTC heater assembly further comprises:
a first voltage dividing resistor connected in parallel with the first PTC heater, a second voltage dividing resistor connected in parallel with the second PTC heater, a third voltage dividing resistor connected in parallel with the third PTC heater, and a fourth voltage dividing resistor connected in parallel with the fourth PTC heater.
5. The heating device of claim 4, wherein the PTC heater assembly further comprises:
a first voltage stabilizing rectifier tube connected in parallel with the first PTC heater and connected in series with the first voltage dividing resistor;
a second voltage stabilizing rectifier tube connected in parallel with the second PTC heater and connected in series with the second voltage dividing resistor;
a third voltage-stabilizing rectifier tube connected in parallel with the third PTC heater and in series with the third voltage-dividing resistor;
a fourth voltage regulation rectifier tube connected in parallel with the fourth PTC heater and in series with the fourth voltage dividing resistor.
6. The heating device of claim 5, wherein the PTC heater assembly further comprises:
a first monitoring light-emitting tube connected in parallel with the first voltage-stabilizing rectifier tube;
a second monitoring light emitting tube connected in parallel with the second voltage stabilizing rectifier tube;
a third monitoring light-emitting tube connected in parallel with the third voltage-stabilizing rectifier tube;
and the fourth monitoring luminous tube is connected with the fourth voltage-stabilizing rectifying tube in parallel.
7. An outdoor terminal box comprising heating means for heating the outdoor terminal box, wherein the heating means is a heating means as claimed in any one of claims 1 to 6.
8. The outdoor terminal box of claim 7, wherein the PTC heater assemblies are evenly distributed on the box body.
9. The outdoor terminal box of claim 7, wherein the heating device is removably mounted to the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220133240.9U CN217283424U (en) | 2022-01-18 | 2022-01-18 | Heating device for heating outdoor terminal box and outdoor terminal box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220133240.9U CN217283424U (en) | 2022-01-18 | 2022-01-18 | Heating device for heating outdoor terminal box and outdoor terminal box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217283424U true CN217283424U (en) | 2022-08-23 |
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ID=82896659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220133240.9U Active CN217283424U (en) | 2022-01-18 | 2022-01-18 | Heating device for heating outdoor terminal box and outdoor terminal box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217283424U (en) |
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2022
- 2022-01-18 CN CN202220133240.9U patent/CN217283424U/en active Active
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