CN210805445U - Dry-type voltage transformer - Google Patents
Dry-type voltage transformer Download PDFInfo
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- CN210805445U CN210805445U CN201921876163.0U CN201921876163U CN210805445U CN 210805445 U CN210805445 U CN 210805445U CN 201921876163 U CN201921876163 U CN 201921876163U CN 210805445 U CN210805445 U CN 210805445U
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Abstract
The utility model provides a dry-type voltage transformer, which comprises a box body, a transformer core group and a mounting base, wherein the transformer core group is fixed on the mounting base; the air cooling system comprises a first fan, an air inlet pipe and a dehumidifier; a plurality of mounting cavities are arranged in the mounting base, and an air exhaust hole at the upper end of each mounting cavity is opposite to the lower end of one transformer core; each installation cavity is provided with a first fan and a dehumidifier, the air exhaust end of the first fan is opposite to the air exhaust hole, and the dehumidifier is installed between the air exhaust hole and the air exhaust end of the first fan; the cooling system comprises a first heat exchanger and an external cooling mechanism; all be equipped with one between the first fan in every installation cavity and the dehumidifier first heat exchanger, all first heat exchanger's inlet tube and drain pipe all communicate with external cooling body. The utility model provides the high cooling effect of transformer core group reduces because of the high possibility that breaks down of temperature, improves the security level.
Description
Technical Field
The utility model relates to a dry-type voltage transformer technical field, concretely relates to dry-type voltage transformer.
Background
The dry-type transformer is widely used in places such as local illumination, high-rise buildings, airports, wharf CNC mechanical equipment and the like. The obvious difference between dry and oil-immersed transformers is that it means that the core and windings are not immersed in insulating oil.
The temperature reduction of the dry-type transformer is more critical, and the good heat dissipation system can ensure the continuous safe operation of the dry-type transformer, so that the dry-type transformer has a great number of effects and advantages. Conventional cooling methods of current dry-type transformers are classified into natural air cooling (AN) and forced air cooling (AF). Wherein forced air cooling formula is only through the fan cooling of blowing to the transformer core group, if improve the cooling effect can only be through the mode that improves wind-force, the cooling effect is not obvious moreover. When the transformer core group runs at full power, the cooling modes have the defects that heat is not timely dissipated, the optimal performance of the dry-type transformer cannot be exerted, and meanwhile, certain potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a dry-type voltage transformer to improve the cooling effect of transformer core group, reduce because of the high possibility that breaks down of temperature, improve the security level.
The utility model provides a dry-type voltage transformer, which comprises a box body, a transformer core group and a mounting base, wherein the transformer core group is fixed on the mounting base, and the box body covers the transformer core group and the mounting base;
the air cooling system comprises a first fan, an air inlet pipe and a dehumidifier; a plurality of mounting cavities are arranged in the mounting base, and an air exhaust hole at the upper end of each mounting cavity is opposite to the lower end of one transformer core; each installation cavity is provided with a first fan and a dehumidifier, the air exhaust end of the first fan is opposite to the air exhaust hole, the dehumidifier is installed between the air exhaust hole and the air exhaust end of the first fan, and the air inlet end of the first fan is communicated to the outside of the box body through an air inlet pipe;
the cooling system comprises a first heat exchanger and an external cooling mechanism; the first heat exchangers are arranged between the first fan and the dehumidifier in each installation cavity, water inlet pipes and water outlet pipes of all the first heat exchangers are communicated with the external cooling mechanism, and cooling liquid flows through each first heat exchanger through the external cooling mechanism so as to cool air flowing through the first fan.
The beneficial effects of the utility model are embodied in:
when the transformer core group works, the air cooling system works, namely the first fan is started, and the temperature is reduced in a forced air cooling mode. After the temperature of the transformer core group continues to rise and exceeds the set temperature, the cooling system works, the cooling liquid is circularly conveyed to the first heat exchanger through the external cooling mechanism, so that the air flowing through the first fan is cooled, the cooling effect is greatly improved, the rapid cooling is realized, the continuous full-power operation of the transformer core group can be ensured, the safety and the stability are realized, and the performance of the dry-type transformer is fully exerted.
Preferably, the external cooling mechanism comprises a casing, a water pump, a second heat exchanger and a water tank; the water tank and the second heat exchanger are respectively arranged at the lower part and the upper part of the shell, the water pump is arranged in the water tank, and the water pump, the second heat exchanger, all the first heat exchangers and the water tank are sequentially communicated to form water circulation.
Preferably, the external cooling mechanism further comprises a second fan fixed to the housing, the front side wall and the rear side wall of the housing are both provided with vent holes, the second fan and the second heat exchanger are located between the two vent holes, and the air exhaust end of the second fan is opposite to the second heat exchanger.
The second fan carries out the forced air cooling to second heat exchanger, reduces the temperature of its inside coolant liquid, and microthermal coolant liquid flows through first heat exchanger, in the installation intracavity heat absorption back flow back to the water tank again, and the coolant liquid passes through the water pump and reentries second heat exchanger and cools off to form water circulative cooling. The external cooling mechanism has good cooling effect and high cooling speed, and ensures the normal work of the transformer core assembly.
Preferably, a temperature sensor, a liquid level sensor and cooling liquid are arranged in the water tank.
Preferably, the external cooling mechanism further comprises an audible and visual alarm and a controller which are installed outside the casing.
The controller adopts an industrial common PLC controller, the work is stable, and the failure rate is low. The controller is used for controlling the automatic work of the external cooling mechanism, and specifically, the controller is respectively electrically connected with the water pump, the second fan, the temperature sensor, the liquid level sensor and the audible and visual alarm. When the liquid level sensor detects that the cooling liquid is lower than the set liquid level, the controller enables the audible and visual alarm to work to give out a prompt. When the temperature sensor detects that the temperature of the cooling liquid is higher than the set maximum temperature, the controller enables the audible and visual alarm to work to give out a prompt. And the controller is electrically connected with the control module of the transformer core group and used for feeding back the real-time temperature of the transformer core group so as to automatically start the water pump and the second fan and complete the function of the high-temperature self-starting cooling mechanism.
Preferably, all be equipped with the third fan in the air intake pipe.
Because the setting of first heat exchanger and dehumidifier can cause certain windage, strengthen the circulation of air in order to compensate the windage that first heat exchanger and dehumidifier caused through the third fan.
Preferably, each of the mounting cavities is separated by a median septum.
Every installation cavity is all independent, avoids appearing the turbulent problem of air current.
Preferably, the first heat exchanger and the second heat exchanger each include a plurality of radiating pipes communicated in parallel in sequence.
The cooling tube adopts the copper pipe material, improves heat exchange efficiency. In addition, parallel aluminum radiating plates are embedded outside the radiating pipes of the first heat exchanger and the second heat exchanger, and the aluminum radiating plates improve the contact area between the radiating pipes and air and accelerate heat transfer.
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 embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of the present embodiment;
fig. 2 is a schematic structural diagram of the cooling system in fig. 1.
In the attached drawings, a box body 1, a transformer core group 2, a mounting base 3, an air exhaust hole 4, a first fan 5, an air inlet pipe 6, a dehumidifier 7, a mounting cavity 8, a middle partition plate 9, a third fan 10, a machine shell 11, a water pump 12, a second heat exchanger 13, a water tank 14, an audible and visual alarm 15, a controller 16, a temperature sensor 17, a liquid level sensor 18, cooling liquid 19, a second fan 20, a first heat exchanger 21 and a radiating pipe 22 are arranged.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
As shown in fig. 1, the present embodiment provides a dry-type voltage transformer, which includes a box body 1, a transformer core set 2 and a mounting base 3, wherein the transformer core set 2 is fixed on the mounting base 3, and the box body 1 covers the transformer core set 2 and the mounting base 3. The upper part of the box body 1 is provided with an air exhaust hole 4, and the outer side wall of the box body is provided with a control panel and a display panel. This embodiment still includes cooling system and air-cooled system, and the concrete structure of air-cooled system is as follows:
the air cooling system comprises a first fan 5, an air inlet pipe 6 and a dehumidifier 7, wherein three installation cavities 8 are arranged in the installation base 3, and each installation cavity 8 is separated by a middle partition plate 9. Every installation cavity 8 is all independent, avoids appearing the turbulent problem of air current. The upper end air exhaust hole 4 of each installation cavity 8 is just opposite to the lower end of a transformer core, each installation cavity 8 is provided with a first fan 5 and a dehumidifier 7, the air exhaust end of the first fan 5 is just opposite to the air exhaust hole 4, the dehumidifier 7 is installed between the air exhaust end of the air exhaust hole 4 and the air exhaust end of the first fan 5, and the air inlet end of the first fan 5 is communicated to the outside of the box body 1 through an air inlet pipe 6. The transformer core is independently operated by the air cooling of the first fan 5, and the occurrence of interlinking faults is avoided. When the transformer core group 2 works, the air cooling system works, namely the first fan 5 is started, and the temperature is reduced in a forced air cooling mode. In addition, the air inlet pipe 6 is internally provided with a third fan 10, and because the arrangement of the first heat exchanger 21 and the dehumidifier 7 can cause certain wind resistance, the third fan 10 can enhance the air circulation to make up for the wind resistance caused by the first heat exchanger 21 and the dehumidifier 7. The dehumidifier 7 dehumidifies the cold air discharged from the first fan 5, and prevents moisture from entering the transformer core. The dehumidifier 7 is a dehumidifying plate, a water absorbing medium is arranged in the dehumidifying plate, and the water absorbing medium can be a chemical desiccant or a physical desiccant, so long as the dehumidifying and drying functions are achieved.
The specific structure of the cooling system in this embodiment is as follows:
as shown in fig. 2, the temperature reducing system includes a first heat exchanger 21 and an external cooling mechanism, and the external cooling mechanism includes a cabinet 11, a water pump 12, a second heat exchanger 13, and a water tank 14. The first heat exchanger 21 is disposed between the first fan 5 and the dehumidifier 7 in each installation cavity 8, water inlet pipes and water outlet pipes of all the first heat exchangers 21 are communicated with an external cooling mechanism, specifically, the water tank 14 and the second heat exchanger 13 are respectively installed at the lower part and the upper part of the casing 11, the water pump 12 is installed in the water tank 14, and the water pump 12, the second heat exchanger 13, all the first heat exchangers 21 and the water tank 14 are sequentially communicated to form water circulation. The external cooling mechanism further comprises a second fan 20 fixed on the casing 11, the front side wall and the rear side wall of the casing 11 are both provided with vent holes, the second fan 20 and the second heat exchanger 13 are located between the two vent holes, and the air exhaust end of the second fan 20 is opposite to the second heat exchanger 13. The second fan 20 cools the second heat exchanger 13 by air cooling to reduce the temperature of the cooling liquid 19 therein, the low-temperature cooling liquid 19 flows through the first heat exchanger 21, absorbs heat in the installation cavity 8 and then flows back to the water tank 14, and the cooling liquid 19 enters the second heat exchanger 13 again through the water pump 12 to be cooled, so that water circulation cooling is formed. The external cooling mechanism has good cooling effect and high cooling speed, and ensures the normal work of the transformer core group 2.
For the control of the cooling system, the present embodiment further includes an audible and visual alarm 15 and a controller 16 installed outside the housing 11, and a temperature sensor 17, a liquid level sensor 18 and a cooling liquid 19 are disposed in the water tank 14. The controller 16 is electrically connected with the water pump 12, the second fan 20, the temperature sensor 17, the liquid level sensor 18 and the audible and visual alarm 15 respectively. When the level sensor 18 detects that the cooling liquid 19 is below the set level, the controller 16 activates the audible and visual alarm 15 to give an indication. When the temperature sensor 17 detects that the temperature of the cooling liquid 19 is higher than the set maximum temperature, the controller 16 also makes the audible and visual alarm 15 work to give an indication. And the controller 16 is electrically connected with the control module of the transformer core group 2 and is used for feeding back the real-time temperature of the transformer core group 2 so as to automatically start the water pump 12 and the second fan 20, thereby completing the function of the high-temperature self-starting cooling mechanism. The specific self-starting principle is as follows:
after the temperature of the transformer core group 2 continues to rise and exceeds the set temperature, the cooling system works, the cooling liquid 19 is circularly conveyed to the first heat exchanger 21 through the external cooling mechanism, so that the air flowing through the first fan 5 is cooled, the cooling effect is greatly improved, the rapid cooling is realized, the continuous full-power operation of the transformer core group 2 is ensured, the safety and the stability are realized, and the performance of the dry-type transformer is fully exerted.
In this embodiment, each of the first heat exchanger 21 and the second heat exchanger 13 includes a plurality of heat pipes 22 connected in parallel in series. The heat dissipation pipe 22 is made of copper pipe material, so as to improve the heat exchange efficiency. In addition, the heat pipe 22 of the first heat exchanger 21 and the second heat exchanger 13 is embedded with aluminum heat dissipating plates arranged in parallel, and the aluminum heat dissipating plates increase the contact area between the heat pipe 22 and the air, thereby increasing the heat transfer. The drawing shows the structure and distribution of the radiating pipe 22 for cleaning, and the structure of the radiating plate made of aluminum is drawn.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (8)
1. A dry-type voltage transformer comprises a box body, a transformer core group and a mounting base, wherein the transformer core group is fixed on the mounting base, and the box body covers the transformer core group and the mounting base;
the method is characterized in that: the air cooling system comprises a first fan, an air inlet pipe and a dehumidifier; a plurality of mounting cavities are arranged in the mounting base, and an air exhaust hole at the upper end of each mounting cavity is opposite to the lower end of one transformer core; each installation cavity is provided with a first fan and a dehumidifier, the air exhaust end of the first fan is opposite to the air exhaust hole, the dehumidifier is installed between the air exhaust hole and the air exhaust end of the first fan, and the air inlet end of the first fan is communicated to the outside of the box body through an air inlet pipe;
the cooling system comprises a first heat exchanger and an external cooling mechanism; the first heat exchangers are arranged between the first fan and the dehumidifier in each installation cavity, water inlet pipes and water outlet pipes of all the first heat exchangers are communicated with the external cooling mechanism, and cooling liquid flows through each first heat exchanger through the external cooling mechanism so as to cool air flowing through the first fan.
2. A dry-type voltage transformer as claimed in claim 1, wherein: the external cooling mechanism comprises a shell, a water pump, a second heat exchanger and a water tank; the water tank and the second heat exchanger are respectively arranged at the lower part and the upper part of the shell, the water pump is arranged in the water tank, and the water pump, the second heat exchanger, all the first heat exchangers and the water tank are sequentially communicated to form water circulation.
3. A dry-type voltage transformer as claimed in claim 2, wherein: the external cooling mechanism further comprises a second fan fixed on the casing, the front side wall and the rear side wall of the casing are provided with vent holes, the second fan and the second heat exchanger are located between the two vent holes, and the air exhaust end of the second fan is opposite to the second heat exchanger.
4. A dry-type voltage transformer as claimed in claim 2, wherein: and a temperature sensor, a liquid level sensor and cooling liquid are arranged in the water tank.
5. A dry-type voltage transformer as claimed in claim 4 wherein: the external cooling mechanism further comprises an audible and visual alarm and a controller which are arranged outside the shell.
6. A dry-type voltage transformer as claimed in claim 1, wherein: and a third fan is arranged in each air inlet pipe.
7. A dry-type voltage transformer as claimed in claim 1, wherein: each of the mounting cavities is separated by a middle partition plate.
8. A dry-type voltage transformer as claimed in claim 1, wherein: the first heat exchanger and the second heat exchanger respectively comprise a plurality of radiating pipes which are communicated in parallel in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921876163.0U CN210805445U (en) | 2019-11-01 | 2019-11-01 | Dry-type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921876163.0U CN210805445U (en) | 2019-11-01 | 2019-11-01 | Dry-type voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210805445U true CN210805445U (en) | 2020-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921876163.0U Active CN210805445U (en) | 2019-11-01 | 2019-11-01 | Dry-type voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210805445U (en) |
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2019
- 2019-11-01 CN CN201921876163.0U patent/CN210805445U/en active Active
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Address after: 317300 Baita Industrial Cluster, Xianju County, Taizhou City, Zhejiang Province Patentee after: Huaxia Hengye Intelligent Electric Co.,Ltd. Address before: 317300 Baita Industrial Cluster, Xianju County, Taizhou City, Zhejiang Province Patentee before: HUAXIA HENGYE TRANSFORMER CO.,LTD. |