CN110740604A

CN110740604A - Double sealing structure

Info

Publication number: CN110740604A
Application number: CN201911167469.3A
Authority: CN
Inventors: 裴延飞; 徐晓华; 刘洋; 陈洋卫
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-01-31

Abstract

The invention relates to double-seal structures, which comprise a box body, a box cover and an outer-layer sealing element, wherein the upper end of the box body is provided with an inward flange, the box cover is installed and locked on the box body, the lower end of the box cover is provided with the inward flange, the outer-layer sealing element is used for realizing the sealing between the inward flange of the box cover and the inward flange of the box body, the inward flange of the box body is also provided with a vertical part which separates the upper space of the inward flange of the box body, the upper end surface of the inward flange of the box body is connected with a baffle extending out from the lower end surface of the box cover/the lower end surface of the box cover and is sealed by the inner-layer sealing element.

Description

Double sealing structure

Technical Field

The invention relates to the technical field of dustproof and waterproof sealing of electrical equipment, in particular to double-sealing structures.

Background

When the electric equipment is installed in an exposed environment, external rain, dust and other factors enter the inside of the equipment, and the functions of the electric equipment are seriously influenced. For example, electrical equipment of a railway locomotive is usually installed on the roof of the train or hung at the bottom of a frame, and factors such as rainwater and dust enter the equipment to influence the functions of the equipment, so that potential safety hazards are brought to the locomotive. Therefore, the electrical equipment in the exposed environment has higher requirements on the protection level.

The electrical equipment structure is generally composed of a box body and a box cover. The key point to be protected is the junction of the box body and the box cover. The vast majority of protection failure phenomena are caused by rainwater and dust entering the equipment from the joint of the box body and the box cover, and therefore the sealing structure at the joint of the box body and the box cover plays a decisive role in protecting the electrical equipment.

The sealing structure only carries out single-layer sealing, when severe conditions such as rainwater are large, factors such as rainwater and dust can permeate sealing rubber strips and enter electrical equipment, and large potential safety hazards exist in operation of the equipment.

Disclosure of Invention

The invention aims to provide double-layer sealing structures, which can seal the joint of a box cover and a box body in the horizontal direction and the vertical direction by sealing the box body and the box cover in the inner layer and the outer layer, so that electrical equipment in the box body has a reliable sealing environment and meets the use requirements.

The double-seal structure comprises a box body with an inner flange at the upper end, a box cover which is installed and locked on the box body and is provided with an inner flange at the lower end, and an outer seal member for realizing the seal between the inner flange of the box cover and the inner flange of the box body, wherein the inner flange of the box body is also provided with a vertical part which separates the upper space of the inner flange of the box body, and the upper end surface of the vertical part is connected with a baffle plate extending out from the lower end surface of the box cover/the lower end surface of the box cover and is sealed by the inner seal member.

The object of the present invention and the technical problems can be further achieved by following technical means.

The double seal structure described above, wherein the inner seal member is disposed higher than the outer seal member.

In the double-sealing structure, the vertical part is formed by turning over the end of the turned edge in the box body upwards.

In the double-sealing structure, the cover inner flange is formed by extending the periphery of the cover downwards and then turning the cover inwards.

In the aforementioned dual sealing structure, the inner sealing member includes a hollow portion for sealing and a slot portion for fixing.

In the double-sealing structure, the box cover is locked on the box body through a plurality of lockers.

In the aforementioned dual-sealing structure, the lock includes a connecting portion passing through the box cover, an th locking portion in limit fit with the lower surface of the turned edge in the box body, and a second locking portion in limit fit with the upper surface of the box cover.

By means of the technical scheme, the double-sealing structure can achieve considerable technical progress and practicability, has universal utilization value in industry, and at least has the following advantages:

the box cover and the box body are in sealing fit in the horizontal direction and the vertical direction, the joint of the box cover and the box body is provided with the inner and outer double sealing pieces, and the inner and outer sealing pieces are compressed through the locks uniformly distributed on the box cover, so that the sealing requirement of the box cover and the box body is met.

The outer sealing element and the inner sealing element are arranged at different heights, and form internal and external dual protection in the horizontal direction and the vertical direction respectively, so that rain, dust and other factors in the external environment are completely isolated.

Drawings

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

fig. 2 is a partially enlarged view of fig. 1.

[ description of main element symbols ]

1: box body

2: box cover

3: inner flanging of box body

4: inner flanging of box cover

5: vertical part

6: outer seal

7: inner layer sealing element

8: lock set

9 th th locking part

10: second locking part

Detailed Description

To further illustrate the technical means and effects of the present invention for achieving the intended purpose, the following detailed description of the dual seal structure according to the present invention, its structure, features and effects will be given in conjunction with the accompanying drawings and the preferred embodiments.

Please refer to fig. 1 and fig. 2, which are schematic structural diagrams of a double sealing structure of the present invention, the double sealing structure includes a box body 1 and a box cover 2 mounted and locked on the box body 1, wherein the upper end of each side edge of the box body 1 is turned inwards to form a box body inner flange 3, the periphery of the box cover 2 is turned inwards to form a box cover inner flange 4 attached to the box body inner flange, and the box cover inner flange 4 and the box body inner flange 3 are sealed by an outer layer sealing member 6 pressed between the two, so as to prevent external dust, rain water, etc. from entering the box body.

The vertical part 5 which divides the upper space of the box body into an inner part and an outer part is arranged on the box body inner flanging 3, the upper end face of the vertical part 5 is connected with the bottom of the box cover 2 or a baffle extending out of the bottom of the box cover, and an inner layer sealing piece 7 used for realizing the sealing of the box body inner flanging and the inner layer sealing piece is arranged on the contact surface, so that the spaces on two sides of the vertical part on the box body inner flanging are completely isolated, and the secondary protection when the outer layer sealing piece. The outer sealing element and the inner sealing element are arranged at different heights, and form internal and external dual protection in the horizontal direction and the vertical direction respectively, so that rain, dust and other factors in the external environment are completely isolated.

In the embodiment of the invention, the side edge of the box body 1 is Z-shaped after being bent, the inner flanging of the box body is a horizontal waist part of the Z shape, the outer sealing ring is adhered to the upper surface of the inner flanging, the vertical part 5 formed by upward turning of the tail end of the inner flanging 3 of the box body is a vertical tail part of the Z shape, and the inner sealing ring is assembled at the tail end of the vertical part. The box cover 2 is bent to be in a shape of a square-circle as a whole, the bent edge of the square-circle end compresses the outer-layer sealing element 6, and the lower surface of the box cover compresses the inner-layer sealing element 7, but the box cover is not limited to the above.

In the embodiment of the invention, the box cover 2 is locked on the box body 1 through a plurality of locks 8, so that the box cover 2 presses the inner and outer sealing elements to form reliable sealing, the number of the locks is adjusted according to the area of the box cover, and the locks 8 are provided with a connecting part penetrating through the box cover 1, an locking part 9 in limit fit with the lower surface of the turned edge in the box body and a second locking part 10 in limit fit with the upper surface of the box cover 2, but the invention is not limited to the above.

In the present embodiment, the outer seal 6 is in the form of a planar structure. The width of the outer sealing element is matched with the size of a bent edge at the back end of the box cover, and the thickness of the outer sealing element is matched with the height of the lockset and the height of the box cover.

The inner seal 7 is in the form of an upper hollow lower slot structure, but is not limited thereto. The size of the groove of the inner layer sealing element 7 is matched with the thickness of the box body, and the hollow size of the upper part is matched with the height of the lockset and the Z-shaped tail end bending height of the side edge of the box body.

After the box cover and the box body are installed in place, the lock on the box cover enables the box cover to integrally move downwards, and further the outer-layer sealing element and the inner-layer sealing element are compressed, so that the joint of the box cover and the box body is completely filled and sealed by the sealing element. The outer sealing piece and the inner sealing piece have height difference at the arrangement position, so that rain, dust and other factors in the external environment are completely isolated.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

The double-seal structure is characterized by comprising a box body, a box cover and an outer-layer sealing element, wherein the upper end of the box body is provided with an inner flanging, the box cover is installed and locked on the box body, the lower end of the box cover is provided with the inner flanging, the outer-layer sealing element is used for realizing sealing between the inner flanging of the box cover and the inner flanging of the box body, the inner flanging of the box body is further provided with a vertical part which is used for separating the upper space of the box body, and the upper end face of the vertical part is connected with.
2. The double seal structure of claim 1, wherein: wherein the inner seal is disposed higher than the outer seal.
3. The double seal structure of claim 2, wherein: the vertical part is formed by turning the tail end of a turned edge in the box body upwards.
4. The double seal structure of claim 2, wherein: the box cover inner flanging is formed by extending the periphery of the box cover downwards and then turning the box cover inner flanging inwards.
5. The double seal structure of claim 2, wherein: the inner layer sealing element comprises a hollow part for sealing and a clamping groove part for fixing.
6. The double seal structure of claim 2, wherein: wherein the box cover is locked on the box body through a plurality of locksets.
7. The double-sealing structure of claim 6, wherein the lock comprises a connecting portion passing through the box cover, and an th locking portion in limit fit with the lower surface of the turned edge of the box body and a second locking portion in limit fit with the upper surface of the box cover.