CN212461348U

CN212461348U - Dry-type transformer with neutral point and arc suppression coil matched winding

Info

Publication number: CN212461348U
Application number: CN202021642713.5U
Authority: CN
Inventors: 王良明; 徐伟; 陈勇军
Original assignee: Jiangsu Ruien Electric Co ltd
Current assignee: Jiangsu Ruien Electrical Co ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-02-02
Anticipated expiration: 2030-08-10

Abstract

The utility model discloses a dry-type transformer of neutral point and arc suppression coil cooperation winding, including casing and fan, the outside of casing is provided with the shock attenuation box, and both ends all are provided with damping screw about the shock attenuation box, the fan sets up in the lower extreme of shock attenuation box, and the lower extreme of fan is provided with the bottom plate, the top of shock attenuation box is provided with the roof, the front end of casing is provided with the wire, and the front end of wire is provided with the wire screw, the inside of casing is provided with the hollow tube, and the inside of hollow tube is provided with the iron core, buffer spring's inside is provided with the damping piece, the left and right sides of casing all is provided with the support, and the inside of support is provided. This dry-type transformer of neutral point and arc suppression coil cooperation winding is provided with the hollow tube, leaves the space between hollow tube and the iron core, can increase the area of contact of iron core and air, and the coil separates through the wire casing, avoids the coil winding together, improves the radiating effect of coil.

Description

Dry-type transformer with neutral point and arc suppression coil matched winding

Technical Field

The utility model relates to a transformer equipment technical field specifically is the dry-type transformer of neutral point and arc suppression coil cooperation winding.

Background

Dry-type transformers are widely used in local lighting, high-rise buildings, airports, wharf CNC machines and other places, and simply, dry-type transformers refer to transformers in which iron cores and windings are not immersed in insulating oil. The dry-type transformer mainly comprises an iron core formed by silicon steel sheets and a coil poured by epoxy resin, an insulating cylinder is arranged between a high-voltage coil and a low-voltage coil to increase electrical insulation, and the high-voltage coil and the low-voltage coil are supported by cushion blocks and restrained coils, fasteners overlapped with parts of the dry-type transformer have anti-loosening performance, and arc extinguishing coils are arc extinguishing by thinking and are inductance coils with iron cores.

The existing dry-type transformer is safe in operation and long in service life, the reliability of insulation of a transformer winding is greatly determined, when the temperature is too high, the internal winding is greatly influenced, the normal use of the transformer is further influenced, the use requirement of people can not be well met, and technical innovation is performed on the basis of the existing dry-type transformer aiming at the above situation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dry-type transformer of neutral point and arc suppression coil cooperation winding to propose current dry-type transformer in solving above-mentioned background art, safe operation and its life, to a great extent depend on the insulating safe reliability of transformer winding, and inside winding can suffer very big influence when the high temperature, and then influences the normal use of transformer, can not be fine satisfy people's user demand problem.

In order to achieve the above object, the utility model provides a following technical scheme: the dry-type transformer with neutral point and arc suppression coil matched winding comprises a shell and a fan, wherein a damping box is arranged outside the shell, and the left and right ends of the damping box are provided with damping screws, the fan is arranged at the lower end of the damping box, a bottom plate is arranged at the lower end of the fan, a top plate is arranged above the damping box, a lead is arranged at the front end of the shell, and the front end of the lead is provided with a lead screw, the interior of the shell is provided with a hollow tube, the interior of the hollow tube is provided with an iron core, the left side and the right side of the iron core are both provided with wire grooves, and the inside of the wire groove is provided with a coil, the inside of the shock absorption box is provided with a rubber pad, and the inside of the rubber pad is provided with a buffer spring, damping blocks are arranged inside the buffer springs, supports are arranged on the left side and the right side of the shell, and cooling fins are arranged inside the supports.

Preferably, the wire is in threaded connection with the shell through a wire screw, and the lower end of the shell is of a hollow mesh structure.

Preferably, the iron core penetrates through the hollow pipe, a spiral structure is formed between the wire casing and the hollow pipe, and the coil penetrates through the wire casing.

Preferably, the damping box is in threaded connection with the fan through a damping screw, and the damping box is in adhesive connection with the rubber pad.

Preferably, the damping box is elastically connected with the buffer spring, and the damping box is in adhesive connection with the damping block.

Preferably, the cooling fins penetrate through the outer surface of the shell, and six groups of cooling fins are arranged.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model is provided with the lead screw, the traditional dry type transformer welds the lead and the transformer, thereby fixing the lead, increasing the maintenance burden when the lead is damaged, and improving the maintenance cost;

2. the utility model is provided with the hollow pipe, a gap is left between the hollow pipe and the iron core, the contact area between the iron core and the air can be increased, the coil is separated through the wire groove, the coil is prevented from being wound together, the heat dissipation effect of the coil is improved, the fan is arranged, air is supplied from the bottom of the dry-type transformer, and the air circulation can be accelerated;

3. the utility model discloses be provided with the shock attenuation box, dry-type transformer carries out the during operation, and itself can take place slight vibration, can cause wearing and tearing to the casing outside for a long time getting off, and the shock attenuation box can play the shock attenuation effect to dry-type transformer, is provided with the fin, and the multiunit fin carries out work simultaneously, can improve dry-type transformer's radiating effect.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic view of the internal structure of the housing of the present invention;

FIG. 3 is a schematic side view of the present invention;

FIG. 4 is a schematic view of the internal structure of the damping box of the present invention;

fig. 5 is a schematic view of the rear view structure of the present invention.

In the figure: 1. a housing; 2. a wire; 3. a shock-absorbing box; 4. a fan; 5. a base plate; 6. a top plate; 7. a wire screw; 8. a hollow tube; 9. a wire slot; 10. a coil; 11. an iron core; 12. a heat sink; 13. a support; 14. a damping screw; 15. a damping block; 16. a rubber pad; 17. a buffer spring.

Detailed Description

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.

Referring to fig. 1-5, the present invention provides a technical solution: the dry type transformer with the neutral point and the arc suppression coil matched winding comprises a shell 1 and a fan 4, wherein a damping box 3 is arranged outside the shell 1, damping screws 14 are arranged at the left end and the right end of the damping box 3 respectively, the fan 4 is arranged at the lower end of the damping box 3, a bottom plate 5 is arranged at the lower end of the fan 4, a top plate 6 is arranged above the damping box 3, a lead 2 is arranged at the front end of the shell 1, a lead screw 7 is arranged at the front end of the lead 2, the lead 2 is in threaded connection with the shell 1 through the lead screw 7, the lower end of the shell 1 is arranged to be of a hollow net-shaped structure, the lead screw 7 is arranged, and the lead 2 and the transformer are welded together by the traditional dry type transformer, so that the lead 2 is fixed, maintenance burden;

the hollow tube 8 is arranged in the shell 1, the iron core 11 is arranged in the hollow tube 8, the wire slots 9 are formed in the left side and the right side of the iron core 11, the coil 10 is arranged in the wire slots 9, the iron core 11 penetrates through the hollow tube 8, a spiral structure is formed between the wire slots 9 and the hollow tube 8, the coil 10 penetrates through the wire slots 9, the hollow tube 8 is arranged, a gap is reserved between the hollow tube 8 and the iron core 11, the contact area of the iron core 11 and air can be increased, the coil 10 is separated through the wire slots 9, the coil 10 is prevented from being wound together, and the heat dissipation effect of the coil 10 is improved; a rubber pad 16 is arranged inside the shock absorption box 3, a buffer spring 17 is arranged inside the rubber pad 16, the shock absorption box 3 is in threaded connection with the fan 4 through a shock absorption screw 14, the shock absorption box 3 is in adhesive connection with the rubber pad 16, the fan 4 is arranged, air is supplied from the bottom of the dry-type transformer, and air circulation can be accelerated;

the damping block 15 is arranged in the buffer spring 17, the damping box 3 is elastically connected with the buffer spring 17, the damping box 3 is in adhesive connection with the damping block 15, the damping box 3 is arranged, when the dry-type transformer works, the dry-type transformer can slightly vibrate and wear the outer part of the shell 1 for a long time, and the damping box 3 can play a damping effect on the dry-type transformer; the left side and the right side of the shell 1 are provided with the supports 13, the radiating fins 12 are arranged inside the supports 13, the radiating fins 12 penetrate through the outer surface of the shell 1, six groups of radiating fins 12 are arranged, the multiple groups of radiating fins 12 work simultaneously, and the radiating effect of the dry-type transformer can be improved.

The working principle is as follows: when the dry type transformer with the neutral point and the arc suppression coil matched with the winding is used, firstly, no current passes through the coil 10 and the iron core 11 when the dry type transformer works normally, the neutral point potential rises to a phase voltage when the dry type transformer is struck by lightning or single-phase arc grounding occurs, at this time, inductive current flowing through the coil 10 and the iron core 11 and capacitive fault current of the single-phase grounding are mutually counteracted, so that the fault current is compensated, and the residual current after compensation is very small and is not enough to maintain the arc, thereby the dry type transformer is self-extinguished. Therefore, the grounding fault can be rapidly eliminated without causing overvoltage, the fan 4 is started, the hollow tube 8 is not in direct contact with the iron core 11, the fan 4 and the radiating fins 12 are matched to radiate the inside of the shell 1, the normal use of the dry-type transformer is ensured, when the lead 2 is damaged, the lead 2 on the top plate 6 can be detached by screwing the lead screw 7, when the shell 1 vibrates, the driven shock absorption box 3 can vibrate, at the moment, the buffer spring 17 is compressed and generates elasticity after compression to counteract the vibration force, meanwhile, the damping block 15 and the rubber pad 16 play a role in buffering to avoid the up-and-down collision of the shock absorption box 3, the shock absorption box 3 can be detached by screwing the shock absorption screw 14, and the working principle of the dry-type transformer with the neutral arc-extinguishing point and the coil matched with the winding is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Neutral point and arc suppression coil cooperation winding's dry-type transformer, including casing (1) and fan (4), its characterized in that: the damping box (3) is arranged outside the shell (1), damping screws (14) are arranged at the left end and the right end of the damping box (3), the fan (4) is arranged at the lower end of the damping box (3), a bottom plate (5) is arranged at the lower end of the fan (4), a top plate (6) is arranged above the damping box (3), a lead (2) is arranged at the front end of the shell (1), a lead screw (7) is arranged at the front end of the lead (2), a hollow tube (8) is arranged inside the shell (1), an iron core (11) is arranged inside the hollow tube (8), wire grooves (9) are arranged at the left side and the right side of the iron core (11), a coil (10) is arranged inside the wire grooves (9), a rubber pad (16) is arranged inside the damping box (3), and a buffer spring (17) is arranged inside the rubber pad (16), damping blocks (15) are arranged inside the buffer springs (17), supports (13) are arranged on the left side and the right side of the shell (1), and cooling fins (12) are arranged inside the supports (13).

2. A dry-type transformer having a neutral point and arc suppression coil-fitted winding according to claim 1, characterized in that: the wire (2) is in threaded connection with the shell (1) through a wire screw (7), and the lower end of the shell (1) is of a hollow mesh structure.

3. A dry-type transformer having a neutral point and arc suppression coil-fitted winding according to claim 1, characterized in that: the iron core (11) penetrates through the interior of the hollow pipe (8), a spiral structure is formed between the wire groove (9) and the hollow pipe (8), and the coil (10) penetrates through the interior of the wire groove (9).

4. A dry-type transformer having a neutral point and arc suppression coil-fitted winding according to claim 1, characterized in that: the damping box (3) is in threaded connection with the fan (4) through a damping screw (14), and the damping box (3) is in adhesive connection with the rubber pad (16).

5. A dry-type transformer having a neutral point and arc suppression coil-fitted winding according to claim 1, characterized in that: the damping box (3) is elastically connected with the buffer spring (17), and the damping box (3) is in adhesive connection with the damping block (15).

6. A dry-type transformer having a neutral point and arc suppression coil-fitted winding according to claim 1, characterized in that: the radiating fins (12) penetrate through the outer surface of the shell (1), and six groups of radiating fins (12) are arranged.