Dry-type transformer for charging pile

Abstract

The utility model relates to the technical field of transformers, in particular to a dry-type transformer for a charging pile, which comprises a dry-type transformer body, a plurality of heat dissipation channels are arranged in quartz sand poured in the dry-type transformer body through a curing device, and ventilation heat dissipation pipes are arranged in the heat dissipation channels through traction devices. According to the dry-type transformer, on the basis of an original scheme, the ventilation and heat dissipation pipes are arranged in the quartz sand replacing oil, and heat in the quartz sand is taken away by air through the ventilation and heat dissipation pipes through the fans, so that the heat dissipation performance is better; faults caused by heat accumulation in the dry-type transformer body and the influence of high temperature on the service life and working performance of components are effectively reduced, and the ventilation and heat dissipation pipes can be conveniently and rapidly replaced through the traction rope after being used for a long time and aged.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a dry-type transformer for a charging pile. Background Art

[0002] Dry-type transformers are widely used in places such as local lighting, high-rise buildings, airports, and CNC machinery equipment at docks. Simply put, a dry-type transformer refers to a transformer whose core and windings are not immersed in insulating oil. With the popularization of electric vehicles and other equipment, the large-scale installation of charging piles is particularly important to make charging more convenient for users. Among them, because the voltage generated by the power supply cannot be directly used for the voltage output of the charging pile, the output of ordinary transformers is uncontrollable due to the constant turns ratio. The constant current may burn some low-capacity electrical appliances. The demand for transformers that can be easily adjusted and have stable performance is becoming more and more urgent. The existing application number is CN202011238510.4, which is a dry-type transformer for charging piles and its working method. It includes a coil, an upper clamp, a lower clamp, an insulating spacer, an iron core, a copper busbar, an inductor coil, a support plate, an insulator, a connecting rod and a wire end... By adjusting the position of the suspended iron core, the range of the electromagnetic induction effect of the internal coil is changed, thereby adjusting the dry-type transformer to provide a suitable voltage to each charging pile. The coil of this transformer is made of epoxy resin and cast with quartz sand inside. It is not impregnated with insulating oil. Since quartz sand is not easy to flow, the heat dissipation performance is insufficient. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcoming of insufficient heat dissipation performance in the prior art and to propose a dry-type transformer for a charging pile.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A dry-type transformer for a charging pile is designed, comprising a dry-type transformer body, wherein a plurality of heat dissipation channels are provided in the quartz sand cast inside the dry-type transformer body through a curing device, and a ventilation and heat dissipation pipe is provided in the heat dissipation channel through a traction device, and the upper and lower ends of the ventilation and heat dissipation pipe both pass through and extend outside the dry-type transformer body, a base is fixedly provided at the bottom of the dry-type transformer body through a support plate, a ventilation box is fixedly installed on the top of the base, a plurality of through holes corresponding to the ventilation and heat dissipation pipes are provided on the top of the ventilation box, and an inverted funnel is fixed in the through hole, the upper end of the inverted funnel is sealed and connected to the ventilation and heat dissipation pipe, a through hole is provided on the outer wall of the ventilation box, and an air intake pipe is fixed in the through hole, and the outer end of the air intake pipe is fixedly connected to the air intake bellows, and a fan located above the air intake pipe is fixedly installed inside the ventilation box.

[0006] Preferably, the curing device includes a support tube, the support tube is bonded to the inner wall of the heat dissipation channel, and the inner wall of the support tube is slidably connected to the ventilation and heat dissipation tube.

[0007] Preferably, a heating wire is provided inside the support tube when pouring quartz sand, and the support tube is made of thermosetting plastic.

[0008] Preferably, the outer end of the air intake bellows is fixedly connected to a mounting ring for penetrating and fixedly connected to the charging pile housing, and the inner wall of the mounting ring is fixedly mounted with a dust filter.

[0009] Preferably, the traction device includes a traction rope and a traction groove. The traction groove is integrally formed on the outer wall of the ventilation and heat dissipation pipe, and a traction rope is embedded in the traction groove through a connecting device. The upper and lower ends of the traction rope are located outside the dry-type transformer body and are fixedly connected on the outside of the dry-type transformer body.

[0010] Preferably, the connecting device includes a screw and a fixing ring. The outer wall of the traction rope is fixed with a fixing ring located in the traction groove. The right end face of the fixing ring is provided with a threaded hole, and a screw is threadedly connected in the threaded hole. The right end of the screw is threadedly connected to the ventilation and heat dissipation pipe.

[0011] Preferably, a plurality of heat dissipation fins for increasing the heat dissipation contact area are integrally formed on the inner wall of the ventilation and heat dissipation pipe.

[0012] The utility model proposes a dry-type transformer for a charging pile, which has the following beneficial effects: on the basis of the original solution, the dry-type transformer is provided with a ventilation and heat dissipation pipe inside the quartz sand that replaces oil, and a fan is used to allow air to pass through the ventilation and heat dissipation pipe to remove the heat in the quartz sand, thereby improving the heat dissipation performance, effectively reducing the failure caused by heat accumulation in the dry-type transformer body and the influence of high temperature on the service life and working performance of components, and the ventilation and heat dissipation pipe can be conveniently and quickly replaced by a traction rope after aging after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a dry-type transformer for a charging pile proposed in the utility model;

[0014] Figure 2 This is an enlarged view of area A of a dry-type transformer for a charging pile proposed in the present utility model;

[0015] Figure 3 This is a schematic diagram of the support tube structure of a dry-type transformer for a charging pile proposed in the utility model;

[0016] Figure 4 This is a schematic diagram of the heating wire structure of a dry-type transformer for a charging pile proposed in the present utility model;

[0017] Figure 5 This is a schematic diagram of the ventilation and heat dissipation pipe structure of a dry-type transformer for a charging pile proposed in the utility model.

[0018] In the figure: 1. Base; 2. Air intake pipe; 3. Ventilation box; 4. Inverted funnel; 5. Dry-type transformer body; 6. Traction rope; 7. Ventilation and heat dissipation pipe; 8. Support plate; 9. Mounting ring; 10. Dust filter; 11. Air intake bellows; 12. Fan; 13. Traction groove; 14. Fixing ring; 15. Screw; 16. Quartz sand; 17. Support tube; 18. Heating wire; 19. Heat dissipation fin. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-5 A dry-type transformer for a charging pile includes a dry-type transformer body 5. The quartz sand 16 cast inside the dry-type transformer body 5 is provided with a plurality of heat dissipation channels through a curing device, and a ventilation and heat dissipation pipe 7 is provided in the heat dissipation channel through a traction device. The upper and lower ends of the ventilation and heat dissipation pipe 7 pass through and extend to the outside of the dry-type transformer body 5. The bottom of the dry-type transformer body 5 is fixedly provided with a base 1 through a support plate 8. A ventilation box 3 is fixedly installed on the top of the base 1. The top of the ventilation box 3 is provided with a plurality of through holes corresponding to the ventilation and heat dissipation pipes 7, and an inverted funnel 4 is fixed in the through hole. The upper end of the inverted funnel 4 is sealed and connected to the ventilation and heat dissipation pipe 7. The outer wall of the ventilation box 3 is provided with a through hole, and an air intake pipe 2 is fixed in the through hole, and the outer end of the air intake pipe 2 is fixedly connected to an air intake bellows 11. A fan 12 located above the air intake pipe 2 is fixedly installed inside the ventilation box 3.

[0021] The curing device includes a support tube 17 , the support tube 17 is bonded to the inner wall of the heat dissipation channel, and the inner wall of the support tube 17 is slidably connected to the ventilation and heat dissipation tube 7 .

[0022] When pouring the quartz sand 16 , a heating wire 18 is provided inside the support tube 17 , and the support tube 17 is made of thermosetting plastic.

[0023] The outer end of the air intake bellows 11 is fixedly connected to a mounting ring 9 for penetrating and fixedly connected to the charging pile housing, and the inner wall of the mounting ring 9 is fixedly mounted with a dust filter 10 .

[0024] The traction device includes a traction rope 6 and a traction groove 13. The traction groove 13 is integrally formed on the outer wall of the ventilation and heat dissipation pipe 7, and the traction rope 6 is embedded in the traction groove 13 through a connecting device. The upper and lower ends of the traction rope 6 are located outside the dry-type transformer body 5 and are fixedly connected outside the dry-type transformer body 5.

[0025] The connecting device includes a screw 15 and a fixing ring 14. The outer wall of the traction rope 6 is fixed with a fixing ring 14 located in the traction groove 13. A threaded hole is opened on the right end face of the fixing ring 14, and a screw 15 is threadedly connected in the threaded hole. The right end of the screw 15 is threadedly connected to the ventilation and heat dissipation pipe 7.

[0026] A plurality of heat dissipation fins 19 are integrally formed on the inner wall of the ventilation and heat dissipation pipe 7 to increase the heat dissipation contact area.

[0027] Working principle: When pouring quartz sand 16 for replacing oil into the dry-type transformer body 5, a support tube 17 with a heating wire 18 and a traction rope 6 inside is placed in advance, and then the support tube 17 is heated by the heating wire 18 after the quartz sand 16 is poured to solidify it; the heating wire 18 is taken out and the traction rope 6 is placed in the traction groove 13, and then the screw 15 is inserted into the ventilation and heat dissipation pipe 7, and the ventilation and heat dissipation pipe 7 is brought into the support tube 17 by pulling up the traction rope 6; the outside air filtered by the dust filter 10 is sucked into the ventilation box 3 through the air intake pipe 2 and the air intake bellows 11 by the fan 12, and then enters the ventilation and heat dissipation pipe 7 through the inverted funnel 4 and is discharged, so as to discharge the heat inside the dry-type transformer body 5 and dissipate heat.

[0028] On the basis of the original solution, the dry-type transformer is provided with a ventilation and heat dissipation pipe 7 inside the quartz sand 16 that replaces oil, and the fan 12 allows air to pass through the ventilation and heat dissipation pipe 7 to remove the heat in the quartz sand 16, thereby improving the heat dissipation performance, effectively reducing the failure caused by heat accumulation in the dry-type transformer body 5 and the impact of high temperature on the service life and working performance of components, and the ventilation and heat dissipation pipe 7 can be conveniently and quickly replaced through the traction rope 6 after aging after long-term use.

[0029] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dry-type transformer for a charging pile, comprising a dry-type transformer body (5), characterized in that: The quartz sand (16) cast inside the dry-type transformer body (5) is provided with a plurality of heat dissipation channels through a curing device, and a ventilation and heat dissipation pipe (7) is provided in the heat dissipation channel through a traction device, and the upper and lower ends of the ventilation and heat dissipation pipe (7) are both penetrated and extended to the outside of the dry-type transformer body (5), the bottom of the dry-type transformer body (5) is fixed with a base (1) through a support plate (8), and a ventilation box (3) is fixedly installed on the top of the base (1), and the top of the ventilation box (3) is provided with a plurality of through holes corresponding to the ventilation and heat dissipation pipes (7), and an inverted funnel (4) is fixed in the through hole, and the upper end of the inverted funnel (4) is sealed and connected to the ventilation and heat dissipation pipe (7), the outer wall of the ventilation box (3) is provided with a through hole, and an air intake pipe (2) is fixed in the through hole, and the outer end of the air intake pipe (2) is fixedly connected to an air intake bellows (11), and a fan (12) located above the air intake pipe (2) is fixedly installed inside the ventilation box (3).

2. A dry-type transformer for a charging pile according to claim 1, characterized in that: The curing device comprises a support tube (17), the support tube (17) is bonded to the inner wall of the heat dissipation channel, and the inner wall of the support tube (17) is slidably connected to the ventilation and heat dissipation tube (7).

3. A dry-type transformer for a charging pile according to claim 2, characterized in that: When pouring quartz sand (16), a heating wire (18) is provided inside the support tube (17), and the support tube (17) is made of thermosetting plastic.

4. A dry-type transformer for a charging pile according to claim 1, characterized in that: The outer end of the air intake bellows (11) is fixedly connected to a mounting ring (9) for penetrating and fixedly connecting to the charging pile housing, and the inner wall of the mounting ring (9) is fixedly mounted with a dustproof filter (10).

5. A dry-type transformer for a charging pile according to claim 1, characterized in that: The traction device comprises a traction rope (6) and a traction groove (13); the traction groove (13) is integrally formed on the outer wall of the ventilation and heat dissipation pipe (7); and the traction rope (6) is embedded in the traction groove (13) via a connecting device; the traction rope (6) is located outside the dry-type transformer body (5) at its upper and lower ends and is fixedly connected outside the dry-type transformer body (5).

6. A dry-type transformer for a charging pile according to claim 5, characterized in that: The connecting device comprises a screw (15) and a fixing ring (14); the outer wall of the traction rope (6) is fixed with a fixing ring (14) located in the traction groove (13); the right end surface of the fixing ring (14) is provided with a threaded hole, and the threaded hole is threadedly connected to a screw (15); the right end of the screw (15) is threadedly connected to the ventilation and heat dissipation pipe (7).

7. A dry-type transformer for a charging pile according to claim 1, characterized in that: A plurality of heat dissipation fins (19) for increasing the heat dissipation contact area are integrally formed on the inner wall of the ventilation and heat dissipation pipe (7).

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