CN211702729U

CN211702729U - Sealing structure of outdoor electrical equipment shell

Info

Publication number: CN211702729U
Application number: CN202020319250.2U
Authority: CN
Inventors: 周斌欣
Original assignee: Nanjing Saikewen Electromechanical Technology Co ltd
Current assignee: Nanjing Saikewen Electromechanical Technology Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-10-16
Anticipated expiration: 2030-03-13

Abstract

The utility model provides a sealing structure of an outdoor electrical equipment shell, which comprises a shell, a first sealing plate, a second sealing plate, a plug connector, a sealing ring and a pressing plate; the first sealing plate and the second sealing plate respectively seal two open ends of the shell; the first sealing plate is provided with a jack and a sealing groove which are communicated with each other, the plug connector can penetrate through the jack, and the sealing ring is sleeved on the plug connector; the pressing plate is fixed on the surface of the first sealing plate and presses the sealing ring in the sealing groove, and the sealing ring is tightly attached to the plug connector and the sealing groove after being pressed and deformed; the inner walls of the first sealing plate and the second sealing plate are respectively provided with an annular end face sealing groove matched with the shape of the open end of the shell, an end face sealing ring is arranged in the end face sealing groove, and the first sealing plate and the second sealing plate respectively extrude the end face sealing ring together with the open end. The utility model provides a closing plate of outdoor electrical equipment casing can not repeated dismantlement, and the equipment degree of difficulty is big, the unstable problem of sealed effect.

Description

Sealing structure of outdoor electrical equipment shell

Technical Field

The utility model belongs to the technical field of the electric casing is sealed, concretely relates to seal structure of outdoor electrical equipment casing.

Background

Outdoor electrical equipment such as transformer, instrument case etc. need have good waterproof sealing performance, and current partial electrical equipment shell comprises the casing and installs the closing plate at the casing both ends, and the outside binding post is connected after the plug connector is worn out from the closing plate. The mode through the encapsulating is direct to bond plug connector and closing plate fixed usually, and this kind of plug connector leads to the unable dismantlement of plug connector with the sealed mode of closing plate, and subsequent overhaul of the equipments of being inconvenient for to the encapsulating quantity is difficult to the accurate control. Also have some shells to adopt the sealing washer to seal the plug connector, however to flexible yielding cable plug connector, the sealing washer is difficult to compress tightly the cable effectively, leads to the equipment degree of difficulty big, and sealed effect is unstable.

Similarly, the housing and the sealing plate are also sealed and fixed by glue filling. In addition, a gasket is adopted to compress and seal the shell and the sealing plate, but the shell is formed by extrusion, so that the end face of the shell is determined to be narrow, the contact surface with the gasket is correspondingly reduced, and the sealing effect is poor; and because the end faces of the sealing plate and the shell are only fixed tightly at a plurality of vertex angles by screws, the stress of most positions of the gasket, particularly the middle position far away from the screws, is reduced, the gasket cannot be tightly attached to the end faces of the sealing plate and the shell, and the sealing effect is not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a seal structure of outdoor electrical equipment casing to solve the closing plate that adopts the encapsulating mode equipment and can not repeated the dismantlement, the equipment degree of difficulty is big when adopting the equipment of sealing washer mode, the unstable problem of sealed effect.

The utility model provides a following technical scheme:

a sealing structure of an outdoor electrical equipment shell comprises a shell, a first sealing plate, a second sealing plate, a plug connector, a sealing ring and a pressing plate;

the first sealing plate and the second sealing plate respectively seal two open ends of the shell, so that a sealing cavity is formed in the shell;

the first sealing plate is provided with a jack and a sealing groove which are communicated with each other, the plug connector can penetrate through the jack, and the sealing ring is sleeved on the plug connector; the pressing plate is fixed on the surface of the first sealing plate and presses the sealing ring in the sealing groove, and the sealing ring is tightly attached to the plug connector and the sealing groove after being pressed and deformed;

the inner walls of the first sealing plate and the second sealing plate are respectively provided with an annular end face sealing groove matched with the shape of the open end of the shell, an end face sealing ring is arranged in the end face sealing groove, and the first sealing plate and the second sealing plate respectively extrude the end face sealing ring together with the open end.

Preferably, the pressing plate is provided with a pressing hole for the plug connector to pass through; the jack on the first sealing plate and the sealing groove share the axis, and the sealing groove is a circular truncated cone-shaped groove with the diameter gradually reduced from the top to the bottom.

As another variation, the pressing plate is provided with a pressing hole for the insertion part to pass through; the jack on the first closing plate shares the axle center with the seal groove, and the cross section of seal groove is the circular or polygon with the shape adaptation of plug connector.

The plug connector is a flexible cable or a rigid plug connector.

Furthermore, the top of the sealing ring is provided with a positioning blind hole, the bottom of the pressing plate is provided with a positioning bulge matched with the positioning blind hole, and the positioning bulge is inserted into the positioning blind hole.

Preferably, the pressure plate and the shell are fixed through screws.

Preferably, the cross section of the end face seal ring is circular or polygonal.

The utility model has the advantages that:

the utility model discloses set up jack and seal groove on first closing plate, overlap the sealing washer on the plug connector, then make the sealing washer warp through the clamp plate and hug closely plug connector and seal groove, seal the plug connector, the cooperation structure of clamp plate and sealing washer makes this device be applicable to outdoor electrical equipment's casing sealed, and waterproof performance is good.

Meanwhile, annular end face sealing grooves matched with the shapes of the open ends of the shell are formed in the inner walls of the first sealing plate and the second sealing plate, end face sealing rings are arranged in the end face sealing grooves, and the first sealing plate and the second sealing plate respectively extrude the end face sealing rings together with the open ends, so that the sealing mode of pouring glue between the shell and the sealing plates is replaced by the structure, the assembly is simple, and the disassembly can be repeated; this structure replaces directly to add the gasket between casing and closing plate, then screws up the sealed mode all around of closing plate with the screw, has increased the area of contact between sealing member and casing and the closing plate, has avoided the gasket to seal the insecure problem that leaks in the position beyond screwing up the stress point, and sealed effect is balanced.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

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

fig. 2 is a schematic view of a fitting structure of a seal ring and a seal groove of the present invention;

fig. 3 is a schematic view of another fitting structure of the sealing ring and the sealing groove of the present invention;

fig. 4 is a front view of an inner structure of the first sealing plate of the present invention.

Labeled as: 10. a housing; 11. sealing the cavity; 20. a first sealing plate; 21. a jack; 22. a sealing groove; 23. an end face seal groove; 30. a second sealing plate; 40. a plug-in unit; 50. a seal ring; 60. pressing a plate; 61. pressing the hole; 62. positioning the projection; 70. and an end face seal ring.

Detailed Description

The present disclosure provides a sealing structure of an outdoor electrical equipment housing, which is used for sealing housings of outdoor electrical equipment such as an electrical cabinet, an instrument box, a transformer box, a circuit breaker and the like.

As shown in fig. 1 and 2, the sealing structure includes a housing 10, a first sealing plate 20, a second sealing plate 30, a plug 40, a packing 50, and a pressure plate 60.

The housing 10 has two open ends, and the first sealing plate 20 and the second sealing plate 30 seal the two open ends of the housing 10, respectively, so that a sealed cavity 11 is formed inside the housing 10 to seal the electric components, the wiring board, and various terminals.

The first sealing plate 20 is provided with a plurality of insertion holes 21 and sealing grooves 22 which are communicated with each other, the plug-in unit 40 can penetrate through the insertion holes 21, and the sealing ring 50 is sleeved on the plug-in unit 40. The pressing plate 60 is provided with a pressing hole 61 for the plug-in unit 40 to pass through, the plug-in unit 40 can penetrate through the pressing hole 61, the pressing plate 60 is fixed on the surface of the first sealing plate 20 through screws, the sealing ring 50 is pressed in the sealing groove 22, and the sealing ring 50 is tightly pressed and deformed to be tightly attached to the plug-in unit 40, the sealing groove 22 and the pressing plate 60, so that the joint of the plug-in unit 40 and the first sealing plate 20 is sealed. Preferably, the insertion hole 21 of the first seal plate 20 is coaxial with the seal groove 22, so that the axial and radial deformation of the seal ring 50 is more uniform, and the sealing effect is more stable. The plug connector 40 may be a flexible cable or a rigid plug connector, and when the plug connector is a cable, the pressing plate 60 reliably fixes a flexible portion of the cable extending out of the first sealing plate, so as to prevent the cable from being bent arbitrarily due to extrusion of the sealing ring.

As shown in fig. 2, the sealing groove 22 is a circular truncated groove with a diameter gradually decreasing from top to bottom as a sealing form. The sealing ring 50 is arranged in the circular truncated cone-shaped sealing groove, so that the sealing ring 50 can be more effectively extruded and deformed, the outer side of the sealing ring is tightly attached to the sealing groove, the inner side of the sealing ring is tightly attached to the plug connector 40, the space in the sealing groove 22 is fully filled, and the sealing effect is better. Meanwhile, the circular truncated cone-shaped sealing groove can solve the problem that the outer diameter sizes of cables of different manufacturers in the same national brand are not consistent.

As another modification, as shown in fig. 3, the cross section of the sealing groove 22 is a circular or polygonal groove adapted to the shape of the plug-in unit 40. Because the plug connector 40 can be a circular cable, a circular or other metal connector, the cross sections of the sealing groove 22 and the insertion hole 21 can be flexibly configured to be matched with the shape of the plug connector 40, so that a good sealing effect is achieved.

As shown in fig. 4, in order to accommodate the diversity of connectors, the first sealing plate 20 may be provided with two types of sealing grooves.

Further, referring to fig. 2 and 3, a blind positioning hole may be set at the top of the sealing ring 50, and a positioning protrusion 62 matching with the blind positioning hole is disposed at the bottom of the pressing plate 60, when assembling, the positioning protrusion 62 is inserted into the blind positioning hole, to perform local pre-positioning on the sealing ring 22, and then the pressing plate 60 is pressed tightly, so that the sealing ring 50 is deformed more sufficiently, and the outer circumferential wall thereof can be more closely attached to the sealing groove 22, the plug-in connector 40, and the pressing plate 60, thereby reducing the gap at the joint of each sealing element and improving the sealing effect. The positioning protrusions 62 also enable the sealing ring 50 to be smoothly pressed into the sealing groove 22, so that the sealing ring 50 is prevented from being twisted and deformed in the process of pressing down the sealing ring, and the assembly process is easier. The positioning protrusion 62 may be a cylindrical column or a circular arc plate.

Referring to fig. 1 and 4, in order to better seal the open end of the casing 10, annular end face seal grooves 23 matching the shape of the open end of the casing 10 are formed on the inner walls of the first seal plate 20 and the second seal plate 30, end face seal rings 70 are disposed in the end face seal grooves 23, the first seal plate 20 and the second seal plate 30 respectively press the end face seal rings 70 together with the open end of the casing, and then the first seal plate 20 and the second seal plate 30 are screwed to the casing 10. The end face seal groove 23 is formed in the end face seal groove 23 on the first seal plate 20 and the second seal plate 30, the end face seal ring 70 is assembled in the end face seal groove 23, the mounting position of the end face seal ring is transferred to the seal plates, the contact area between the end face seal ring and the open end of the shell 10 can be increased, and the problems that the contact area between a seal gasket and the shell is small due to the thin wall of the shell 10, the sealing performance is weak, and the sealing performance is unbalanced due to the small stress of the middle part of the gasket are solved. The cross-section of the face seal ring 70 is circular or polygonal, i.e.: the cross-section may be any regular or irregular shape capable of serving a sealing function.

The utility model discloses an installation does: the plug 40 is inserted into the insertion hole 21 and extends out of the sealing groove 22, the sealing ring 50 is sleeved on the plug 40, the pressing plate 60 presses the sealing ring 50 to deform and fill the sealing groove 22, and then the pressing plate 60 is fixed on the first sealing plate 20 by screws. The cables, if present, may also be assembled and secured to the first sealing sheet 20 in a similar manner as described above. Then, the two end face seal rings 70 are respectively placed in the end face seal grooves 23 of the first seal plate 20 and the second seal plate 30, and the first seal plate 20 and the second seal plate 30 are screwed to the housing 10 by screws, thereby completing the assembly of the sealed housing.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure of an outdoor electrical equipment shell is characterized by comprising a shell, a first sealing plate, a second sealing plate, a plug connector, a sealing ring and a pressing plate;

the first sealing plate and the second sealing plate respectively seal the two open ends of the shell, so that a sealing cavity is formed in the shell;

the first sealing plate is provided with a jack and a sealing groove which are communicated with each other, the plug connector can penetrate through the jack, and the sealing ring is sleeved on the plug connector; the pressing plate is fixed on the surface of the first sealing plate and compresses the sealing ring in the sealing groove, and the sealing ring is tightly attached to the plug connector and the sealing groove after being compressed and deformed;

the inner wall of the first sealing plate and the inner wall of the second sealing plate are both provided with annular end face sealing grooves matched with the shapes of the open ends of the shell, end face sealing rings are arranged in the end face sealing grooves, and the first sealing plate and the second sealing plate are respectively extruded together with the open ends of the end face sealing rings.

2. A sealing structure of an outdoor electrical equipment casing according to claim 1, wherein said pressing plate is provided with a pressing hole for said plug connector to pass through; the jack and the seal groove on the first seal plate share the axis, and the seal groove is a circular truncated cone-shaped groove with the diameter gradually reduced from the top to the bottom.

3. A sealing structure of an outdoor electrical equipment casing according to claim 1, wherein said pressing plate is provided with a pressing hole for said plug connector to pass through; the jack and the seal groove on the first seal plate share the axle center, and the cross section of the seal groove is circular or polygonal in shape adaptation with the plug connector.

4. A sealing arrangement of an outdoor electrical equipment housing according to claim 1, characterised in that the plug is a flexible cable or a rigid plug.

5. A sealing structure of an outdoor electrical equipment shell according to claim 2 or 3, characterized in that the top of the sealing ring is provided with a positioning blind hole, the bottom of the pressing plate is provided with a positioning protrusion matched with the positioning blind hole, and the positioning protrusion is inserted into the positioning blind hole.

6. A sealing structure of an outdoor electrical equipment casing according to claim 2 or 3, characterized in that the pressing plate and the casing are fixed by screws.

7. A sealing arrangement of an outdoor electrical equipment housing according to claim 1, characterised in that the cross-section of the end-face sealing ring is circular or polygonal.