CN217406112U

CN217406112U - Junction box and nuclear reactor containment

Info

Publication number: CN217406112U
Application number: CN202221399035.3U
Authority: CN
Inventors: 赵亚城; 单士起; 杨佳儒; 郭毅飞; 曾刚; 张伟; 杨景利; 吴显东; 孙洪涛
Original assignee: China Techenergy Co Ltd
Current assignee: China Techenergy Co Ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-09-09
Anticipated expiration: 2032-06-07

Abstract

The utility model discloses a junction box and nuclear reactor containment, junction box include the seal assembly in box main part, chamber door and sealed chamber door and box main part gap, and seal assembly includes sealing washer and spacing subassembly, and spacing subassembly is equipped with the draw-in groove that the annular is used for the holding sealing washer, and spacing unit mount is on box main part or chamber door. In the junction box that this application provided, through setting up spacing subassembly, set up the draw-in groove of holding sealing washer at spacing subassembly, and then reduce the dislocation of closing the door to the sealing washer and roll for the sealing washer effectively seals, and then has improved the leakproofness of junction box.

Description

Junction box and nuclear reactor containment

Technical Field

The utility model relates to a nuclear power station technical field, in particular to junction box. The utility model discloses still relate to a nuclear reactor containment including above-mentioned junction box.

Background

Nuclear reactor containment, or containment, containment building or enclosure, safety plant, safety shelter, is the building that constitutes the outermost periphery of a pressurized water reactor, and is used to control and limit the diffusion of radioactive materials out of the reactor, so as to protect the public from the harm of the radioactive materials. In case of rare loss of coolant accident with escape of primary water from the reactor, the containment is the last barrier to prevent fission products from being released to the surroundings.

However, the conventional junction box of the nuclear reactor containment comprises a box body main body and a box door mounted on the box body main body, a gap between the box door and the box body main body is sealed by a bonded sealing ring, however, the sealing ring is frequently subjected to dislocation rolling to cause deformation of the sealing ring, the sealing performance of the junction box is reduced, and of course, the above problems also exist in other electrical junction boxes.

Therefore, how to improve the sealing performance of the junction box is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a junction box, the leakproofness of this junction box improves. It is another object of the present invention to provide a nuclear reactor containment vessel including the junction box described above.

In order to achieve the above object, the utility model provides a junction box, including the seal assembly in box main part, chamber door and sealed chamber door and box main part gap, seal assembly includes sealing washer and spacing subassembly, and spacing subassembly is equipped with the annular draw-in groove that is used for holding the sealing washer, and spacing unit mount is on box main part or chamber door.

Preferably, the stopper is installed on the door, and the stopper assembly includes:

the first limiting component comprises a first mounting ring and a first limiting ring connected with the edge of the first mounting ring, and the mounting ring is connected with the box door; and

the first limiting ring is positioned on one side of the first limiting ring, which is far away from the second limiting member, and the second limiting ring is positioned on one side of the second limiting ring, which is far away from the first limiting member.

Preferably, the door further comprises a reinforcing rib fixedly connected with the back surface of the door, and the end part of the reinforcing rib is connected with the limiting assembly.

Preferably, at least one of the first stop member and the second stop member is laser-welded to the door.

Preferably, the box body is provided with a limiting flange which is bent outwards, and the end face of the limiting flange forms a limiting face which is abutted to the sealing ring.

Preferably, the opposite sides of the sealing ring are equally divided into waterproof rings which are arranged in a convex annular mode, the waterproof ring on one side is abutted against the box door, the waterproof ring on the other side is abutted against the box body main body, the waterproof rings are arranged in an annular mode along the surface of the sealing ring, and the middle of the waterproof rings is a hollow position of the sealing ring.

Preferably, each side of the sealing ring is provided with at least three waterproof rings, and the waterproof rings on each side of the sealing ring are sequentially sleeved at intervals from outside to inside.

Preferably, the box body main body comprises an outer skin, a bearing beam and an inner frame, the inner frame is welded on the inner side of the outer skin in a corner mode, a notch is formed in the bending position of the bearing beam, and the notch is welded with the inner frame through the corner welding; the fixed thread piece of the box body is welded with the bearing beam, and the thread end part of the fixed thread piece protrudes out of the box body.

Preferably, the box door further comprises a threaded fastener for fastening the box door and the box body, and the threaded fastener is positioned outside the sealing ring;

the box body main body is provided with a blind hole mounting part, the edge of the blind hole mounting part is fixedly connected with the box body main body in a sealing way, a thread blind hole matched with a thread fastener in a thread way is arranged in the blind hole mounting part, and the outer end of the blind hole mounting part is provided with a boss protruding out of the box body main body;

the box door is provided with a mounting plate, and the mounting plate is provided with a limiting end face of which the end face is abutted to the boss.

A reactor containment vessel comprising a junction box as claimed in any one of the preceding claims.

In the technical scheme, the utility model provides a junction box includes the seal assembly in box main part, chamber door and sealed chamber door and box main part gap, and seal assembly includes sealing washer and spacing subassembly, and spacing subassembly is equipped with the draw-in groove that the annular is used for the holding sealing washer, and spacing unit mount is on box main part or chamber door.

According to the above description, in the junction box provided by the application, through setting up the limiting assembly, the clamping groove for accommodating the sealing ring is arranged on the limiting assembly, and then the dislocation of the sealing ring is rolled when the door is closed is reduced, so that the sealing ring is effectively sealed, and the sealing performance of the junction box is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an open state of a junction box according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an installation position of a junction box according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a box body provided in an embodiment of the present invention;

FIG. 4 is a schematic view of the case body of FIG. 3 along the A-A direction;

fig. 5 is a schematic view of an internal structure of a box body provided in an embodiment of the present invention;

FIG. 6 is a schematic view of the box body of FIG. 5 along the direction B-B;

fig. 7 is a three-dimensional structure diagram of the box body provided by the embodiment of the present invention;

fig. 8 is a layout diagram of a plurality of junction boxes provided in an embodiment of the present invention;

fig. 9 is a front view of a door in accordance with an embodiment of the present invention;

fig. 10 is a rear view of a door in accordance with an embodiment of the present invention;

fig. 11 is a cross-sectional view of a seal ring according to an embodiment of the present invention;

fig. 12 is a diagram illustrating a mounting position of a seal ring according to an embodiment of the present invention;

FIG. 13 is a partially enlarged view of a connecting position between the main body and the door of the case according to the embodiment of the present invention;

fig. 14 is a view of the arrangement of the threaded fasteners of the box door according to the embodiment of the present invention.

Wherein in FIGS. 1-14: 1-box body, 2-box door, 3-sealing ring, 4-threaded fastener, 5-hinge, 6-built-in structural member, 7-mounting bracket, 8-limit end face, 9-outer skin, 10-inner frame, 11-bearing beam, 12-internal connecting member, 13-fixed threaded member, 14-mounting hole, 15-reinforcing rib, 16-limit component, 17-mounting plate, 18-waterproof ring, 19-limit flanging, 20-blind hole mounting member, 21-boss, 22-first limit member and 23-second limit member.

Detailed Description

The core of the utility model is to provide a junction box, the leakproofness of this junction box improves. At the other core of the utility model, provide a nuclear reactor containment including above-mentioned junction box.

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the accompanying drawings and embodiments.

Please refer to fig. 1 to 14.

In a specific implementation manner, the utility model discloses the junction box that specific embodiment provided includes the seal assembly in box main part 1, chamber door 2 and sealed chamber door 2 and the 1 gap of box main part, and seal assembly includes sealing washer 3 and spacing subassembly 16, and spacing subassembly 16 is equipped with the annular draw-in groove that is used for holding sealing washer 3, and spacing subassembly 16 is installed on box main part 1 or chamber door 2. Specifically, one side of the sealing ring 3 is connected with the box door 2, and the other side is connected with the box body main body 1.

Preferably, the stop assembly 16 is mounted on the door 2. Wherein, the inside U type groove of spacing subassembly 16 forms the draw-in groove. The position limiting component 16 is disposed around the inner wall of the door 2, and specifically, the position limiting component 16 is welded to the door 2. Specifically, preferably, the clamping groove is of an annular groove body structure.

Specifically, the exterior of the box body 1 is connected with an external structure through a mounting bracket 7. The internal connecting piece 12 is arranged inside the box body 1, specifically, the internal connecting piece 12 can be a bolt, and the internal connecting piece 12 is arranged, so that the internal structural component of the box body 1 can be conveniently installed.

Because the junction box requirement satisfies IP67 protection level requirement under the long-term operation operating mode in the nuclear power station containment, sealing washer 3 mounting structure adopts the draw-in groove design, prevents that sealing washer 3 from receiving the dislocation to roll when chamber door 2 frequently closes, forms the displacement and influences chamber door 2 sealing system stability.

In one embodiment, the stop is mounted to the door 2, and the stop assembly 16 includes a first stop member 22 and a second stop member 23. The first limiting member 22 comprises a first mounting ring and a first limiting ring connected with the edge of the first mounting ring, and the mounting ring is connected with the box door 2. The second limiting member 23 comprises a second mounting ring and a second limiting ring connected with the edge of the second mounting ring, a clamping groove is formed on the surfaces of the first limiting ring, the second limiting ring and the box door 2, the first mounting ring is positioned on one side, away from the second limiting member 23, of the first limiting ring, and the second mounting ring is positioned on one side, away from the first limiting member 22, of the second limiting ring.

Specifically, the first position-limiting member 22 is sleeved outside the second position-limiting member 23.

Chamber door 2 and box mounting structure adopt to prevent slow-witted design, adopt three hinge 5 about in, ensure that sealing washer 3 volume of compression all around keeps unanimous and reliable and stable.

Further, the junction box also comprises a reinforcing rib 15 fixedly connected with the back surface of the box door 2, and the end part of the reinforcing rib 15 is connected with a limiting component 16. Specifically, the reinforcing rib 15 is provided in plural, and the plural reinforcing ribs are reinforced to form a cross-shaped structure. This application is spacing 16 through using two L type structure component combined forming, this draw-in groove distribute around 2 inner walls of chamber door with 2 inner walls of chamber door 15 combined action, consolidate chamber door 2, improve 2 rigidity of chamber door, make chamber door 2 press closed receive the sealing strip reverse action under, chamber door 2 is enough level and smooth with 3 contact surfaces of sealing washer.

Preferably, at least one of the first and second stop members 22 and 23 is laser-welded to the door 2. The first limiting member 22 and the second limiting member 23 are subjected to staggered laser welding, the contact surface of the sealing ring 3 is not damaged, the staggered welding forms two-point fixation of a section straight line, and the flatness of the connecting position of the first limiting member 22 and the second limiting member 23 is improved.

As shown in fig. 12, in order to prolong the service life of the seal ring 3, it is preferable that the case body 1 is provided with a stopper flange 19 bent outward, and an end surface of the stopper flange 19 forms a stopper surface to be brought into contact with the seal ring 3. The box body flanging design is adopted, the sealing ring 3 is in surface-to-surface contact with the box body crimping surface, the sealing ring 3 is in a parameterized design, the compression amount of the sealing ring is controlled to be 20% -30%, the elastic performance of the sealing ring can be kept from losing efficacy in long-term use, and the sealing ring 3 is prevented from generating stress permanent deformation for ensuring that the IP67 is locally stressed too much in long-term use.

In a specific embodiment, the limiting flange 19 and the abutting surface of the box door 2 with the sealing ring 3 are respectively of an annular corrugated structure, and the sealing ring 3 deforms to form a multi-sealing structure after the sealing ring 3 is pressed.

As shown in fig. 11, in order to further improve the sealing performance, it is preferable that waterproof rings 18 protruding outward in a ring shape are formed on both opposite sides of the gasket 3, one side of the waterproof ring 18 abuts against the door 2, the other side of the waterproof ring 18 abuts against the box body 1, the waterproof ring 18 is provided in a ring shape along the surface of the gasket 3, and the middle is a hollow position of the gasket 3. Preferably, the centers of all waterproofing rings 18 are located on the same line as the center of the sealing ring 3.

Preferably, at least two waterproofing rings 18 are provided on each side of the sealing ring 3. More preferably, each side of the sealing ring 3 is provided with at least three waterproof rings 18, and the waterproof rings 18 on each side of the sealing ring 3 are sequentially sleeved at intervals from outside to inside. After the sealing ring 3 is in compression joint, three waterproof rings 18 on each side form three ribs and form three waterproof layers after compression joint, so that the waterproof stability and reliability are ensured.

The box body 1 comprises an outer skin 9, a bearing beam 11 and an inner frame 10, and specifically, the outer skin 9 is flanged to form a limiting flange 19. The outer skin 9 is preferably a metal piece.

The inner frame 10 is fillet welded on the inner side of the outer skin 9, a notch is arranged at the bending part of the bearing beam 11, and the notch is welded with the inner frame 10 through fillet welding.

As shown in FIG. 6, the fixing screw 13 of the box body 1 is welded to the load beam 11, and the screw end of the fixing screw 13 protrudes out of the box body 1. This application box main part 1 includes outer covering 9, spandrel girder 11 and internal frame 10, and through welded connection, the atress intensity is big, ensures the bulk strength of box main part 1.

In the specific assembly, the electrical equipment is mounted on the bearing beam 11, the shielding ground, the binding wire frame and the like in the built-in structural component 6 are mounted on the inner frame 10, no processing trace is left on the outer surface of the box body 1, and the outer surface is attractive. The built-in structural member 6 and the electrical equipment are mounted on the bearing beam 11 and the inner frame 10, and specifically, the fixing screw 13 is mounted on the inner frame 10. The outer surface of the box body 1 is not provided with redundant openings.

Specifically, the fixing screw 13 is embedded into the bearing beam 11 (as shown in fig. 6) by full-weld welding, and penetrates through the outer skin 9, the bearing beam 11 and the inner frame 10, so that the box body 1 is prevented from being damaged due to local stress in the anti-seismic process.

The hinge mounting hole on the box body 1 is designed by adopting a blind hole with a limit threaded hole, the hole body of the hinge 5 mounted on the box body 1 is a threaded hole isolated from the box body 1, and the hinge 5 is mounted through a threaded part in the threaded hole. The structure of the hole body is arranged on the box body main body 1 for full welding treatment.

On the basis of each scheme, the junction box further comprises a threaded fastener 4 used for fastening the box door 2 and the box body main body 1, the threaded fastener 4 is located on the outer side of the sealing ring 3, other holes are not formed in the sealing ring 3 on the box door 2, the threaded fastener 4 is arranged at four corners of the sealing ring 3, and the situation that the four corners are greatly stressed to cause tilting is avoided.

The box body 1 is provided with a blind hole installation part 20, the edge of the blind hole installation part is fixedly connected with the box body 1 in a sealing mode, a threaded blind hole matched with the threaded fastener 4 in a threaded mode is arranged in the blind hole installation part 20, and a boss 21 protruding out of the box body 1 is arranged at the outer end of the blind hole installation part 20. Among them, the blind hole mount 20 is preferably subjected to a full-scale welding process for the case body 1.

Specifically, the box body 1 is provided with a mounting hole 14 for receiving the threaded fastener 4 therein, wherein the mounting hole 14 may be provided on the inner frame 10 or the bearing beam 11.

The box door 2 is provided with an installation plate 17, and the installation plate 17 is provided with a limit end surface 8 with an end surface abutting against the boss 21.

This application chamber door 2 installation is done and is prevented slow-witted, spacing processing, guarantees under the normal production technology that 3 compression capacities of sealing washer are in application range, through setting up spacing subassembly 16, sets up the draw-in groove of holding sealing washer 3 at spacing subassembly 16, and then reduces the dislocation to sealing washer 3 when closing the door and roll for sealing washer 3 effectively seals, and then has improved the leakproofness of junction box.

The box can satisfy two kinds of mounting means of conventional installation and cabinet combination installation simultaneously according to on-the-spot in service behavior.

The junction box is not limited to other products which use a certain part of the structure form of the box body independently, and can be suitable for products in any shape and in any size form according to the requirement.

The IP67 waterproof design is satisfied through the junction box, the product is guaranteed to have good shock resistance, impact resistance, compression resistance and IP67 protective properties in long-term use, the service cycle is long, and the junction box is used in a service environment with strict requirements on stability and reliability.

The reactor containment provided by the application comprises any one of the junction boxes. The foregoing describes a specific structure of the junction box, and the present application includes the above junction box, which also has the above technical effects.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a junction box, its characterized in that, includes box main part (1), chamber door (2) and seals chamber door (2) with the seal assembly in box main part (1) gap, seal assembly includes sealing washer (3) and spacing subassembly (16), spacing subassembly (16) are equipped with the annular and are used for the holding the draw-in groove of sealing washer (3), install spacing subassembly (16) box main part (1) or on chamber door (2).

2. The junction box of claim 1, wherein the stop assembly (16) comprises:

the first limiting member (22), the first limiting member (22) comprises a first mounting ring and a first limiting ring connected with the edge of the first mounting ring, and the first mounting ring is connected with the box door (2); and

the second limiting member (23), the second limiting member (23) include the second collar and with the second collar that the second collar border is connected, the second collar with chamber door (2) are connected, first collar, the second collar and chamber door (2) surface form the draw-in groove, first collar is located first collar is kept away from second limiting member (23) one side, the second collar is located the second collar is kept away from first limiting member (22) one side.

3. The junction box according to claim 2, characterized in that it further comprises a reinforcing rib (15) fixedly connected to the back of said box door (2), the end of said reinforcing rib (15) being connected to said stop assembly (16).

4. The junction box according to claim 2, characterized in that at least one of said first stop member (22) and said second stop member (23) is laser-welded with said box door (2) in offset position.

5. The junction box according to claim 1, characterized in that the box body (1) is provided with a limiting flange (19) which is bent outwards, and the end surface of the limiting flange (19) forms a limiting surface which is abutted against the sealing ring (3).

6. The junction box according to claim 1, characterized in that opposite sides of the sealing ring (3) are respectively formed with a waterproof ring (18) in a convex annular arrangement, one side of the waterproof ring (18) is abutted against the box door (2), the other side of the waterproof ring (18) is abutted against the box body main body (1), the waterproof ring (18) is arranged in an annular arrangement along the surface of the sealing ring (3), and the middle part is a hollow position of the sealing ring (3).

7. The connection box according to claim 6, characterized in that at least three waterproofing rings (18) are provided on each side of the sealing ring (3), the waterproofing rings (18) on each side of the sealing ring (3) being arranged one above the other at intervals from the outside inwards.

8. The junction box according to claim 1, characterized in that the box body (1) comprises an outer skin (9), a bearing beam (11) and an inner frame (10), the inner frame (10) is fillet-welded on the inner side of the outer skin (9), a bending part of the bearing beam (11) is provided with a notch, and the notch is welded with the inner frame (10) through fillet welding; and a fixed threaded part (13) of the box body (1) is welded with the bearing beam (11), and the threaded end part of the fixed threaded part (13) protrudes out of the box body (1).

9. The connection box according to any one of claims 1 to 8, further comprising a threaded fastener (4) for fastening the box door (2) to the box body (1), the threaded fastener (4) being located outside the gasket (3);

a blind hole mounting piece (20) with the edge fixedly connected with the box body main body (1) in a sealing manner is arranged on the box body main body (1), a threaded blind hole in threaded fit with the threaded fastener (4) is arranged in the blind hole mounting piece (20), and a boss (21) protruding out of the box body main body (1) is arranged at the outer end of the blind hole mounting piece (20);

be equipped with mounting panel (17) on chamber door (2), mounting panel (17) be equipped with the terminal surface with spacing terminal surface (8) of boss (21) butt.

10. A reactor containment vessel comprising a junction box according to any one of claims 1 to 9.