CN212277849U

CN212277849U - Sealing structure of junction box of traction reactor box

Info

Publication number: CN212277849U
Application number: CN202021135206.2U
Authority: CN
Inventors: 田广荣
Original assignee: Changsha Changyuan Transformer Co ltd
Current assignee: Changsha Changyuan Transformer Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-01-01
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a traction reactor case terminal box seal structure, establish apron (2) on the terminal box including terminal box (1) and lid, the both sides of terminal box set up a plurality of wiring holes (14), wiring hole internal seal installation glan head (4), the operation mouth is seted up at the top of terminal box, just the sealing washer is established to the cover on the surrounding edge of operation mouth, the arc angle is fallen into in the turn of surrounding edge, the apron warp the sealing washer with terminal box sealing connection. The utility model discloses can guarantee to pass through the insulator connection in the terminal box with first connecting cable and second connecting cable under the tight circumstances of external dimension, guarantee to seal protective properties ground situation fixed to guarantee that the reactor draws forth wiring safety, the protection level reaches IP65, and the volume is littleer, and weight is lighter, and electric clearance is bigger, moves safelyr.

Description

Sealing structure of junction box of traction reactor box

Technical Field

The utility model relates to a rail vehicle traction reactor, especially a traction reactor case terminal box seal structure.

Background

At present, electric transmission equipment of motor train units, subways and trams in the rail transit industry, particularly equipment below vehicles, is large in size, small in installation space, incapable of interfering other parts in installation and disassembly, modular in design, compact in structure and small in size as far as possible. The size of some electric transmission equipment products in a certain direction is strictly limited, the customization requirements of customers are strict, and various parameters including inductance, overall dimension, weight, electric clearance, temperature rise and protection grade are ensured to meet the requirements in a limited space. However, the existing traction reactor box junction box is generally poor in sealing performance and waterproof performance and is not suitable for various severe environments possibly encountered under vehicles.

A junction box sealing structure is used for a traction reactor box of a subway and plays a role in protecting connection of a reactor and other equipment in a circuit connection loop.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to current traction reactor case terminal box general leakproofness, waterproof performance are not good, provide a traction reactor case terminal box seal structure that leakproofness, waterproof nature are good.

In order to solve the technical problem, the utility model provides a traction reactor case terminal box seal structure, establish the apron on the terminal box including terminal box and lid, the both sides of terminal box set up a plurality of wiring holes, the interior seal installation glan head of wiring hole, the operation mouth is seted up at the top of terminal box, just the sealing washer is established to the cover on the surrounding edge of operation mouth, the arc angle is fallen into in the turn of surrounding edge, the apron warp the sealing washer with terminal box sealing connection.

The utility model discloses an at wiring hole internal seal installation glan head, can prevent in the infiltration terminal box of junction box from wiring hole department such as rainwater, in addition, the sealing washer is established to the cover on the surrounding edge of terminal box operation mouth, the turn of surrounding edge is fallen into the arc angle, guarantees not corrugating after the sealing washer installation, guarantees that the apron is installed after the terminal box, and the sealing washer closely laminates with the apron, forms seal structure to improve overall structure's leakproofness and waterproof nature.

Preferably, a plurality of insulators used for connecting cable joints are fixedly mounted at the bottom of the junction box, a first connecting cable for connecting an electric reactor penetrates through a wiring hole on one side of the junction box and is connected to the insulators, and a second connecting cable for connecting external equipment penetrates through a wiring hole on the other side of the junction box and is electrically connected with the first connecting cable connected to the insulators, so that the ground electric gap and the creepage distance of a cable nose meet requirements, and the electric reactor connecting wire and other equipment connecting wires can be protected.

Preferably, the electrical strength of the insulator is not less than 10kV so as to ensure the electrical safety of the connecting terminal inside the junction box.

Preferably, the wire noses of the first and second connecting cables have an electrical clearance to ground of more than 40mm, and the creepage distance is more than 50 mm.

Preferably, a blind nut is installed at the top of the junction box, an alignment stud is installed on the cover plate, and the alignment stud on the cover plate is fixedly connected with the blind nut on the junction box.

Preferably, the edge of the cover plate is bent inwards to strengthen the stress of the fastening position of the cover plate, so that the cover plate is not easy to deform.

Preferably, the sealing ring is made of a foamed rubber sealing strip, so that the sealing ring has good elasticity, and can be applied to severe environments for a long time without aging and deformation.

Preferably, the IP protection rating of the glan header is not less than IP 65.

Preferably, the junction box and the cover plate are formed by bending and welding metal plates, and the welding position ensures water resistance and no leakage.

Preferably, the two ends of the junction box are provided with connecting parts for connecting with an external box of the reactor, so that the junction box can be conveniently connected and fixed.

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

1. the utility model discloses can guarantee sealed barrier propterty under the circumstances that keeps the external dimension compactness, it is fixed to pass through the insulator connection in the terminal box with first connecting cable and second connecting cable, guarantees that the reactor draws forth wiring safety, and the protection level reaches IP65, and the volume is littleer, and weight is lighter, and electric clearance is bigger, moves safelyr.

Drawings

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

fig. 2 is a schematic structural view of the junction box of the present invention;

fig. 3 is a schematic structural diagram of the cover plate of the present invention.

In the figure: 1. a junction box; 2. a cover plate; 3. a seal ring; 4. a glan head; 5. an insulator; 6. a first connection cable; 7. a wire nose; 8. the wire nose fastening nut; 9. a blind nut; 10. aligning the stud; 11. a second connection cable; 12. a connecting portion; 13. mounting a bolt on the insulator; 14. a wiring hole; 15. and an operation port.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described with reference to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.

Example 1:

referring to fig. 1, 2 and 3, an embodiment of the sealing structure for the junction box of the traction reactor box of the present invention includes a junction box 1, a cover plate 2, a sealing ring 3, a glan head 4 and other components.

The junction box 1 and the cover plate 2 are formed by welding metal sheets, and waterproof welding seams are guaranteed. The top of the junction box 1 is welded with a blind nut 9, the cover plate 2 is welded with an alignment stud 10, the blind nut 9 and the alignment stud 10 are correspondingly arranged, and the cover plate 2 is covered on the junction box 1 through the alignment stud 10 and the blind nut 9. 6 insulator mounting bolts 13 are welded inside the junction box 1, and insulators 5 are mounted on the insulator mounting bolts 13. Wiring holes 14 are symmetrically formed in side plates on two sides of the junction box 1, and the insulators 5 are just arranged in the middle of the wiring holes 14 on the two sides. The glan head 4 is arranged in the wiring hole 14, and the aperture of the wiring hole 14 is consistent with that of the glan head 4, so that the minimum clearance fit between the wiring hole 14 and the glan head 4 is kept. The outside of the terminal box 1 is welded with 4 cylindrical connecting parts 13, and the connecting parts 13 are used for connecting with the external box of the reactor. Operation mouth 15 is seted up at the top of terminal box 1, and installation sealing washer 3 on the surrounding edge of operation mouth 15, and the transition of the radius arc angle of department of turning on the surrounding edge of operation mouth 15 to guarantee not corrugate after 3 installations of sealing washer, guarantee 2 fastening connection terminal boxes of apron after 1, sealing

washer

3 and 2 inseparable laminating of apron form seal structure. The glan head preferably employs a protection rating of IP65 to ensure hermeticity of the cable exit.

In this embodiment, since the internal space of the entire terminal box 1 is compact, and the wire noses 7 of the 6 sets of cables need to be respectively crimped on the 6 insulators 5 to realize fixed electrical connection, electrical connection between the reactor and an external device is realized in the terminal box 1.

The insulator 5 in the embodiment can ensure that the wire nose 7 of the cable has an electrical clearance to the ground of more than 40mm and the creepage distance is more than 50 mm.

The utility model discloses during the use, first connecting cable 6 of connecting the reactor passes the wiring hole 14 of terminal box 1 one side is connected its line nose 7 insulator 5 is last, and the second connecting cable 11 of connecting external equipment passes the wiring hole 14 of terminal box 1 opposite side is also connected its line nose on insulator 5, through the fastening of line nose fastening nut 8 and insulator 5 can be with installing the first, the line nose 7 electricity of two connecting cable on same insulator 5 is connected.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. The utility model provides a traction reactor case terminal box seal structure, includes terminal box (1) and lid and establishes apron (2) on the terminal box, the both sides of terminal box set up a plurality of wiring holes (14), its characterized in that, wiring hole internal seal installation glan head (4), operation mouth (15) are seted up at the top of terminal box, just sealing washer (3) are established to the cover on the surrounding edge of operation mouth, the turn of surrounding edge is fallen into the arc angle, the apron warp the sealing washer with terminal box sealing connection.

2. The structure of a junction box of a traction reactor box according to claim 1, wherein a plurality of insulators (5) are fixedly installed at the bottom of the junction box, a first connecting cable (6) for connecting a reactor is passed through a wiring hole at one side of the junction box and connected to the insulators, and a second connecting cable (11) for connecting an external device is passed through a wiring hole at the other side of the junction box and electrically connected to the first connecting cable connected to the insulators.

3. The traction reactor box terminal box sealing structure according to claim 2, wherein the electrical strength of the insulator is not less than 10 kV.

4. The traction reactor box junction box sealing structure according to claim 2, wherein a ground electrical gap of wire noses of the first and second connection cables is larger than 40mm, and a creepage distance is larger than 50 mm.

5. The structure of the junction box of the traction reactor box is characterized in that a blind nut (9) is installed at the top of the junction box, an alignment stud (10) is installed on the cover plate, and the alignment stud on the cover plate is tightly connected with the blind nut on the junction box.

6. The traction reactor box terminal box sealing structure according to claim 1, wherein an edge of the cover plate is bent inward.

7. The traction reactor box junction box sealing structure according to claim 1, wherein the sealing ring is made of a foamed rubber sealing strip.

8. The traction reactor box terminal box sealing structure according to claim 1, wherein an IP protection rating of the glan head is not less than IP 65.

9. The traction reactor box junction box sealing structure according to claim 1, wherein the junction box and the cover plate are formed by bending and welding metal plates.

10. The traction reactor box terminal box sealing structure according to claim 1, wherein both ends of the terminal box are mounted with connection portions for connection with a reactor outer box.