CN210223701U

CN210223701U - Transformer with lightning protection function

Info

Publication number: CN210223701U
Application number: CN201921168932.1U
Authority: CN
Inventors: Guiming Chen; 陈桂明
Original assignee: Nanjing Cullen Technology Co Ltd
Current assignee: Nanjing Cullen Technology Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-03-31
Anticipated expiration: 2029-07-23

Abstract

The utility model relates to a transformer with lightning protection function belongs to the transformer field, including transformer, protective housing, insulating layer, lightning protection cover, lightning rod, arrester and earth connection, its technical essential is, be equipped with a plurality of heat abstractor on protective housing's the side, heat abstractor includes fan and fan base, fan base fixes on the inner wall of protective housing, fan shell fixes on fan base, the fan is in fan shell, be equipped with in the fan and drive fan pivoted motor, the motor is fixed on fan base, fan base corresponds the motor position and is equipped with insulating seat, fan base and protective housing correspond fan base position and are equipped with the ventilation hole. The utility model is suitable for a transformer that has a lightning protection function that the heat dissipation is good.

Description

Transformer with lightning protection function

Technical Field

The utility model belongs to the technical field of the technique of transformer and specifically relates to a transformer with lightning protection function is related to.

Background

The transformer is a device for changing alternating voltage by using the principle of electromagnetic induction, and the main components are a primary coil, a secondary coil and an iron core (magnetic core), when alternating current is introduced into the primary coil, alternating magnetic flux is generated in the iron core (or the magnetic core), so that voltage (or current) is induced in the secondary coil. With the continuous improvement of the safety of the power system, the transformer is often arranged in an outdoor environment as an important component device in the power industry, and the magnetic field around the transformer is strong, so that the probability of lightning strike is high, and therefore how to protect the transformer and avoid the transformer from being damaged by the lightning strike has great significance for safe power supply.

Chinese patent No. CN209045334U discloses a transformer with lightning protection function, which includes a transformer, a protective casing, a connecting device, a lightning protection cover, a lightning rod, a grounding wire, a base and an insulating base; the bottom of the protective shell is fixedly connected to the upper surface of the base; the side surface of the transformer is fixedly connected to the center inside the protective shell through a plurality of connecting devices, and the bottom surface of the transformer is fixedly connected to the center of the upper surface of the base through an insulating seat; the bottom of the connecting seat is fixedly connected to the top surface of the protective shell, and the lower side edge of the lightning protection cover is fixedly connected to the upper side edge of the protective shell; the lightning rod is a plurality of, the inside fixed connection of conducting sleeve is outside the base, the conducting sleeve top surface is connected with the protective housing bottom surface, fixedly connected with several earth connection on the conducting sleeve bottom surface.

Although this kind of lightning protection transformer also can reach the effect of lightning protection, the transformer inevitably has copper loss (coil resistance generates heat), iron loss (the iron core generates heat) and magnetic leakage (through the closed magnetic induction line of air) etc. and the transformer is being wrapped up in to the protective housing full side of this kind of transformer, makes the heat gathering of transformer in the casing, and is difficult for volatilizing, and heat dispersion is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a transformer with lightning protection function has the performance characteristics that heat dispersion is good.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a transformer with a lightning protection function comprises a transformer, a protective shell and an insulating layer, wherein the bottom of the insulating layer is fixedly connected with the bottom of the protective shell, the transformer is arranged in the protective shell, the bottom of the transformer is fixedly connected with the insulating layer, a lightning protection cover is arranged at the upper end of the protective shell, a plurality of lightning rods are arranged on the protective shell, discharge columns which are in contact with the lightning rods are arranged below the lightning rods, lightning arresters which are connected with the discharge columns are arranged below the discharge columns, the lightning arresters are located in the upper side face of the protective shell, and a plurality of grounding wires are arranged at the bottom of the protective shell and are connected with the lightning arresters through a protective shell body;

the fan comprises a protective shell and is characterized in that a plurality of heat dissipation devices are arranged on the side face of the protective shell and comprise a fan and a fan base, the fan base is fixed on the inner wall of the protective shell, the fan shell is fixed on the fan base, the fan is arranged in the fan shell, a motor for driving the fan to rotate is arranged in the fan shell, an insulating seat is arranged at the position, corresponding to the motor, of the fan base, and ventilation holes are formed in the positions, corresponding to the fan base, of the fan base and the protective shell.

Through adopting above-mentioned technical scheme, drive the fan through the motor and rotate, the fan makes the heat that the transformer produced roll out from the ventilation hole, makes the transformer heat dissipation more rapid. The fan base is provided with the insulating seat to ensure that the motor is not easily influenced by thunder when the thunder passes through the lightning protection cover from the lightning rod to be contacted with the protective shell.

The utility model discloses further set up to: and the side wall of the protective shell, on which the fan is not installed, is provided with a ventilation groove.

Through adopting above-mentioned technical scheme, siphoning away the heat from the transformer when the fan rotates, the inside air of protecting sheathing reduces relatively, makes protecting sheathing inhale outside fresh air from the ventilation slot, keeps the circulation of air, and the inspiratory air has further dispersed the heat of transformer, reaches better radiating effect.

The utility model discloses further set up to: the heat dissipation device further comprises a plurality of heat dissipation fins, and the positions of the heat dissipation fins, corresponding to the fans, are fixedly connected with the outer wall of the protective shell.

Through adopting above-mentioned technical scheme, some follow vents are released in the fan rotation of the absorbed heat of fan, and on another part passed through fan base and transmitted protective housing, the heat of protective housing gathering released through the fin, made the transformer heat dissipation more abundant.

The utility model discloses further set up to: the radiating fins are arranged in a herringbone structure.

By adopting the technical scheme, when heat is transferred to the radiating fins from the protective shell, the herringbone structure of the radiating fins enables the contact area of the heat and the radiating fins to be larger, the contact area of the radiating fins and air is also enlarged, and the radiating speed of the radiating fins is enabled to be faster.

The utility model discloses further set up to: and a heat-conducting silicone grease layer is arranged on the outer surface of the radiating fin.

Through adopting above-mentioned technical scheme, the heat conductivility of heat conduction silicone grease makes the better derivation from the fin of heat, makes things convenient for the heat dissipation of fin, and heat conduction silicone grease has good insulating properties, and the thunder and lightning is difficult for stopping on the fin, directly gets into in the ground through protective housing and earth connection contact.

The utility model discloses further set up to: the inner wall of the protective shell is provided with a plurality of radiating grooves, and the radiating grooves are located below the insulating layer.

Through adopting above-mentioned technical scheme, increased the area of contact of heat with protective housing bottom, further improved the radiating effect.

The utility model discloses further set up to: the outer edge of the lightning protection cover extends out of the protective shell.

By adopting the technical scheme, in thunderstorm weather, when rainwater falls down on the lightning protection cover, the edge of the lightning protection cover exceeds the edge of the protection shell, so that the rainwater is not easy to enter the protection shell along a straight line downwards to influence the work of the transformer.

The utility model discloses further set up to: the lightning protection cover is provided with a plurality of mounting groove, the lightning rod bottom corresponds a plurality of installation journal stirrup of mounting groove fixedly connected with, the installation journal stirrup cooperatees with the mounting groove shape, the lateral wall of mounting groove has seted up the stroke groove along the circumference of lightning rod axis, stroke groove thickness be less than the mounting groove and with installation journal stirrup thickness cooperation, the stroke inslot is equipped with magnet.

Through adopting above-mentioned technical scheme, installation journal stirrup on the lightning rod gets into from the mounting groove to rotatory entering stroke groove realizes being connected of lightning rod and lightning protection cover, and after installation journal stirrup got into the stroke groove, the magnet of stroke inslot made installation journal stirrup and stroke groove zonulae occludens, was difficult directly to take out the lightning rod from. When the lightning rod needs to be replaced after being used, the lightning rod is rotated to be separated from the attraction of the magnet, and the lightning rod is rotated back to the mounting groove from the stroke groove and taken out of the lightning protection cover to realize replacement.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the heat in the protective outer shell is taken out of the shell through the rotation of the fan, so that the heat dissipation effect is good, and the working environment of the transformer is not easily influenced by heat;

2. the heat accumulated on the shell of the protective shell is radiated through the radiating fins, so that the radiating effect is further improved;

3. the contact area between heat and the protective shell is increased through the heat dissipation groove, so that the heat is transferred more quickly, and the heat dissipation effect of the protective shell is better;

4. the lightning rod is connected with the lightning protection cover through the magnet so that the lightning rod can be replaced conveniently.

Drawings

Fig. 1 is a schematic view of an overall structure of a transformer with a lightning protection function according to this embodiment.

Fig. 2 is a schematic sectional view for showing the internal structure of the protective casing in the embodiment.

Fig. 3 is a partially enlarged schematic view for embodying the fan structure in the present embodiment.

Fig. 4 is a schematic diagram for showing the relationship between the lightning rod and the lightning protection cover structure in this embodiment.

Fig. 5 is a schematic cross-sectional view for embodying the structure of the heat sink in the present embodiment.

In the figure, 1, a transformer; 2. a protective housing; 21. a heat sink; 211. a fan; 212. a fan base; 2121. an insulating base; 213. a fan case; 214. a motor; 215. a vent hole; 216. a heat sink; 2161. a thermally conductive silicone layer; 22. a ventilation slot; 23. a heat sink; 3. an insulating layer; 4. a lightning protection cover; 41. mounting grooves; 42. a stroke slot; 421. a magnet; 5. a lightning rod; 51. mounting a support lug; 6. a discharge column; 7. a lightning arrester; 8. and a ground line.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): the utility model provides a transformer with lightning protection function, as shown in fig. 1 and fig. 2, including transformer 1, protective housing 2 and insulating layer 3, insulating layer 3 and the bottom fixed connection of 2 inner walls of protective housing, transformer 1 in protective housing 2 and with insulating layer 3 fixed connection, 2 upper ends of protective housing are equipped with lightning protection cover 4 and pass through a plurality of bolted connection with protective housing 2, are equipped with a plurality of lightning rod 5 on the lightning protection cover 4, make up into lightning protection transformer 1's basic component.

As shown in fig. 2, the bottom of the inner wall of the protective casing 2 is provided with a plurality of heat dissipation grooves 23, so that the contact area between heat and the protective casing 2 is increased, and the heat dissipation performance of the protective casing 2 is further improved.

As shown in fig. 2 and fig. 3, a plurality of heat dissipation devices 21 are disposed on a side surface of an inner wall of the protective housing 2, each heat dissipation device 21 includes a fan 211, a fan base 212 and a fan housing 213, the fan base 212 is fixed on the inner wall of the protective housing 2, the fan housing 213 is fixed on the fan base 212 and the fan 211 is disposed in the fan housing 213, a motor 214 for driving the fan 211 to rotate is disposed in the fan housing 213, and the motor 214 is fixed on the fan base 212. The fan 211 and the fan base 212 are made of heat insulating material at the position corresponding to the motor 214, so that the motor 214 is not easily affected by heat, and the side surface of the fan base 212 contacting the protective casing 2 corresponding to the motor 214 is provided with an insulating seat 2121 for preventing the influence of current disturbance on the motor 214 when lightning passes through. The positions of the fan base 212 and the protective housing 2 corresponding to the fan base 212 are provided with the vent holes 215, so that when the fan 211 rotates to absorb the heat of the transformer 1, the heat is released from the protective housing 2 through the vent holes 215, and a good heat dissipation effect is achieved.

As shown in fig. 2 and fig. 3, the heat dissipation device 21 further includes a plurality of heat dissipation fins 216, the heat dissipation fins 216 are fixedly connected to the outer wall of the protective housing 2 corresponding to the position of the fan 211, and a part of heat absorbed by the fan 211 during rotation is released from the ventilation holes 215, and a part of heat is transmitted to the protective housing 2 through the base of the fan 211 and then dissipated through the heat dissipation fins 216.

As shown in fig. 5, the herringbone structure of the heat sink 216 enlarges the contact area between heat and the heat sink 216, further improving the heat dissipation effect, and the heat conductive silicone layer 2161 is disposed on the outer surface of the heat sink 216, so that the heat conductivity is greatly improved, and the insulation of the heat conductive silicone layer 2161 makes the lightning not easy to stay on the heat sink 216 and quickly enter the ground.

As shown in fig. 2 and 4, the edge of the lightning protection cover 4 extends to the outside of the protective casing 2, so that rainwater is not easy to enter the protective casing 2 to affect the operation of the transformer 1 when falling. Be equipped with a plurality of mounting groove 41 on the lightning protection cover 4, 5 bottom fixedly connected with a plurality of installation journal stirrup 51 of lightning rod, installation journal stirrup 51 cooperatees with the shape of mounting groove 41, make lightning rod 5 imbed in lightning protection cover 4 through installation journal stirrup 51, realize being connected of lightning rod 5 and lightning protection cover 4, the lateral wall of mounting groove 41 is equipped with stroke groove 42, stroke groove 42 thickness is less than mounting groove 41 and cooperates with installation journal stirrup 51 thickness, stroke groove 42 sets up along the circumference of lightning rod 5 axis, be equipped with magnet 421 in the stroke groove 42, behind installation journal stirrup embedding mounting groove 41, rotatory lightning rod 5 will install journal stirrup 51 and move to stroke groove 42 from mounting groove 41 in, and with the magnet 421 in the stroke groove 42 in close contact with, stabilize lightning rod 5 and lightning protection cover 4's being connected. When the lightning rod 5 is damaged after being used and needs to be replaced, the lightning rod 5 is rotated reversely by force to separate the mounting support lug 51 from the magnet 421, and then the mounting support lug is pulled out from the mounting groove 41 to complete replacement, so that the operation is very simple and convenient. The bottom of lightning rod 5 is equipped with the discharge post 6 of contradicting with lightning rod 5, and the bottom fixedly connected with arrester 7 of discharge post 6, arrester 7 are equipped with a plurality of earth connections and arrester 7 and earth connection and pass the casing of protecting sheathing 2 and be connected in the side of protecting sheathing 2 on protecting sheathing 2's 2 bottoms, realize transformer 1's lightning-arrest effect.

The specific implementation process comprises the following steps: when the transformer 1 operates, the motor 214 is turned on to drive the motor 214 to drive the fan 211 to rotate, the wind power drives the heat in the protective shell 2 to be released from the vent hole 215, the other part of the heat is transferred to the protective shell 2 from the fan base 212, and the heat is emitted out of the shell through the heat radiating fins 216, so that the heat radiating effect is realized, the heat conducting performance of the heat radiating fins 216 is greatly improved due to the herringbone structures of the heat radiating fins 216 and the heat conducting silicone grease in the heat radiating fins 216, and the heat conducting silicone grease is not easy to stay on the heat radiating fins 216 to damage the heat radiating fins 216 when thunder passes through, so that the heat conducting property is damaged. The heat extracted from the fan 211 makes the air enter from the ventilation slot 22, further improving the heat dissipation effect, and making the periphery of the transformer 1 filled with fresh air, which is not easily affected by excessive heat. The heat dissipation groove 23 at the bottom of the protective casing 2 also increases the contact area between heat and the protective casing 2, and further improves the heat dissipation effect.

When receiving the thunderbolt, lightning rod 5 introduces the thunder and lightning to leading-in with the thunder and lightning through discharge column 6 and arrester 7, the earth connection of being connected with arrester 7 introduces the thunder and lightning underground from protective housing 2 bottom, accomplishes lightning-arrest effect, uses the back at lightning rod 5, and lightning rod 5 receives the damage under the lightning impulse, needs in time to change lightning rod 5 and prevents lightning-arrest effect variation. Therefore, the lightning rod 5 is screwed out of the stroke groove 42, the lightning rod is separated from the suction action of the magnet 421 and is pulled out of the mounting groove 41, the new lightning rod 5 is embedded into the mounting groove 41 again, the lightning rod 5 is screwed to the bottom of the stroke groove 42 and is tightly connected with the magnet 421, the replacement of the lightning rod 5 is completed, and the lightning rod replacement is very simple and convenient.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A transformer with lightning protection function comprises a transformer (1), a protective shell (2) and an insulating layer (3), wherein the bottom of the insulating layer (3) is fixedly connected with the bottom of the protective shell (2), the transformer (1) is arranged in the protective shell (2) and the bottom of the transformer (1) is fixedly connected with the insulating layer (3), the upper end of the protective shell (2) is provided with a lightning protection cover (4), the lightning protection cover (4) is provided with a plurality of lightning rods (5), a discharge column (6) which is abutted against the lightning rod (5) is arranged below the lightning rod (5), a lightning arrester (7) connected with the discharge column (6) is arranged below the discharge column (6), the lightning arrester (7) is positioned in the upper side face of the protective shell (2), and the bottom of the protective shell (2) is provided with a plurality of grounding wires (8) and connected with the lightning arrester (7);

the method is characterized in that: be equipped with a plurality of heat abstractor (21) on the side of protecting sheathing (2), heat abstractor (21) includes fan (211), fan base (212) and fan shell (213), fan base (212) are fixed on the inner wall of protecting sheathing (2), fan shell (213) are fixed on fan base (212), fan (211) are in fan shell (213), be equipped with in fan shell (213) and drive fan (211) pivoted motor (214), fan base (212) correspond motor (214) position and are equipped with insulating seat (2121), fan base (212) and protecting sheathing (2) correspond fan base (212) position and are equipped with ventilation hole (215).

2. The transformer with lightning protection function according to claim 1, wherein: and a ventilation groove (22) is formed in the side wall, on which the fan (211) is not installed, of the protective shell (2).

3. The transformer with lightning protection function according to claim 2, wherein: the heat dissipation device (21) further comprises a plurality of heat dissipation fins (216), and the positions of the heat dissipation fins (216) corresponding to the fan (211) are fixedly connected with the outer wall of the protective shell (2).

4. The transformer with lightning protection function according to claim 3, characterized in that: the fins (216) are arranged in a chevron configuration.

5. The transformer with lightning protection function according to claim 4, characterized in that: the upper outer surface of the radiating fin (216) is provided with a heat-conducting silicone layer (2161).

6. The transformer with lightning protection function according to claim 1, wherein: the inner wall of the protective shell (2) is provided with a plurality of radiating grooves (23), and the radiating grooves (23) are located below the insulating layer (3).

7. The transformer with lightning protection function according to claim 1, wherein: the outer edge of the lightning protection cover (4) extends out of the protective shell (2).

8. The transformer with lightning protection function according to claim 1, wherein: be equipped with a plurality of mounting groove (41) on lightning protection cover (4), lightning rod (5) bottom fixedly connected with a plurality of installation journal stirrup (51), installation journal stirrup (51) cooperate with mounting groove (41) shape, stroke groove (42) have been seted up along the circumference of lightning rod (5) axis to the lateral wall of mounting groove (41), and stroke groove (42) thickness is less than mounting groove (41) and with installation journal stirrup (51) thickness cooperation, be equipped with magnet (421) in stroke groove (42).