CN113270214A

CN113270214A - Fastener for top cover of reactor pressure vessel of nuclear power station

Info

Publication number: CN113270214A
Application number: CN202110509810.XA
Authority: CN
Inventors: 葛少辉; 石松泉; 葛海泉; 戴建海; 张鑫伟; 徐国标
Original assignee: Zhejiang Gaoqiangdu Fasteners Co ltd
Current assignee: Zhejiang Gaoqiangdu Fasteners Co ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-08-17
Anticipated expiration: 2041-05-11
Also published as: CN113270214B

Abstract

The invention discloses a fastener for a top cover of a reactor pressure vessel of a nuclear power station, which comprises a fastening flange and is characterized in that: the gasket device is provided with limiting columns, and the limiting columns are symmetrically arranged on the outer side of the fastening flange and extend into the fastening flange; the swing device is provided with a swing plate, the top of the fastening gasket is uniformly provided with swing discs, and the top of the fastening gasket is provided with a limit groove matched with the swing discs; an adjusting plate; the invention relates to a breathing device, and relates to the technical field of fasteners. This a fastener for nuclear power station reactor pressure vessel top cap has reached the purpose of conveniently clearing up the impurity of the top cap solid particle of nuclear power station reactor pressure vessel, has reduced the clearance degree of difficulty of the solid particle impurity on the pressure vessel top cap, has reduced the wearing and tearing that lead to the pressure vessel to produce among the clearance process, has improved pressure vessel's life.

Description

Fastener for top cover of reactor pressure vessel of nuclear power station

Technical Field

The invention relates to the technical field of fasteners, in particular to a fastener for a top cover of a reactor pressure vessel of a nuclear power station.

Background

The rod position detector is installed outside the stroke cover shell of the driving mechanism, above the reactor pressure vessel, and the coil induction principle is applied, the position of the control rod in the reactor core is displayed, in order to prevent the nuclear power station from being in a shutdown maintenance state, when the top cover of the reactor pressure vessel is opened, impurities such as solid particles on the top cover drop into the pressure vessel, the requirement of the rod position detector installed above the pressure vessel on the cleanliness is very high, but the rod position detector can only detect the cleanliness, the impurities such as the solid particles can not be cleaned when the impurities exist on the surface of the pressure vessel, the difficulty of cleaning the surface of the pressure vessel is increased, meanwhile, the top cover of the pressure vessel is easily abraded in the cleaning process, and the service life of the pressure vessel is shortened.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the fastener for the top cover of the reactor pressure vessel of the nuclear power station, which solves the problem that the impurity cleaning difficulty of the solid particles of the top cover of the reactor pressure vessel of the nuclear power station is higher, reduces the abrasion of the pressure vessel in the cleaning process and prolongs the service life of the pressure vessel.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a fastener for nuclear power station reactor pressure vessel top cap, includes fastening flange, its characterized in that, fastening flange's the outside is provided with:

the gasket device is provided with limiting columns, the limiting columns are symmetrically arranged on the outer sides of the fastening flanges and extend into the fastening flanges, lifting plates are arranged on the outer sides of the limiting columns, limiting plates are arranged on the positions, close to the lifting plates, of the outer sides of the limiting columns, fastening gaskets are arranged on the tops of the lifting plates, and through holes matched with the fastening flanges are formed in the tops of the fastening gaskets;

the swing device is provided with a swing plate, the top of the fastening gasket is uniformly provided with swing discs, the top of the fastening gasket is provided with a limiting groove matched with the swing discs, and the top of each swing disc is provided with a counterweight ball;

the adjusting plate is provided with a reference plate, the top of the reference plate is provided with attaching plates, and the attaching plates are rotatably connected;

respiratory device, this respiratory device have the extension post, extend post and attaching plate fixed connection, the one end that the attaching plate was kept away from to the extension post is provided with breathes the board.

Preferably, a reference groove is formed in one side, away from the swinging plate, of the reference plate, an elastic plate is arranged inside the reference groove, and one end, extending to the outside of the reference groove, of the elastic plate penetrates through the attaching plate.

Preferably, the below that the outside of fastening flange is located swing board is provided with the guide block, one side sliding connection that fastening flange was kept away from to the guide block has the elastic steel board, the dwang is passed through at the top of elastic steel board and is connected with swing board, the spacing spout with dwang looks adaptation is seted up at the top of elastic steel board, with elastic steel board along fastening flange slide to the guide block on, upwards promote swing board and regulating plate after the distance between elastic steel board and the swing board reduces, rotate the benchmark board to the position that is closest to inboard pressure vessel top cap, the attaching plate drives the top cap of elastic plate downwarping laminating pressure vessel because self gravity, can change the appearance according to pressure vessel's top cap and laminate, has improved the adaptation degree of device, can satisfy the needs of the pressure vessel shell of different appearances.

Preferably, the extension groove has been seted up to the one end of extension post, the inside of extension groove is provided with extension spring, extension spring's one end is provided with the extension rod, the extension rod extends to the outside one end of extension groove and is connected with the breathing board.

Preferably, breathe the board and keep away from one side of extending the post and seted up the laminating groove, inner wall one side in laminating groove is rotated and is connected with the attaching plate, inner wall one side in laminating groove is passed through metal shrapnel and is connected with the attaching plate, and metal shrapnel is released the attaching plate to the outside in laminating groove because the elasticity of self, and the attaching plate produces the contact of bigger area with outside top cap after expanding to the outside, and the device rocks the area of contact that improves the collision when leading to breathing the board striking pressure vessel's top cap, reduces the pressure that the striking produced, has reduced because the damage that the collision caused between the device, has improved the life of device.

Preferably, breathe the breathing chamber has been seted up to the inside of breathing the board, the inside of breathing the chamber is provided with the hollow bag of elasticity, the breathing hole has been seted up to the hollow bag of elasticity one side of keeping away from the extension post, one side of breathing the chamber is through bleeder vent and laminating groove intercommunication.

Preferably, one side of extending the post is provided with the compression leg, breathe one side of board set up with the extrusion groove of compression leg looks adaptation, extrusion groove and breathing chamber intercommunication, the compression leg extends to the inside of breathing chamber, through the hollow bag of compression leg extrusion elasticity when extending the post and being close to the top cap, the inside air of the hollow bag of elasticity is spouted to the top cap from laminating groove department after being extruded, with the solid particle on top cap surface impact, can utilize the device because the rocking that external environment reason produced makes the air current and clear up the top cap, eliminates the casing particulate matter on top cap surface, avoids dropping the pressure vessel the inside with impurities such as solid particle on the top cap when opening reactor pressure vessel top cap, has improved the degree of safety when device uses.

(III) advantageous effects

The invention provides a fastener for a top cover of a reactor pressure vessel of a nuclear power station. The method has the following beneficial effects:

(I), this a fastener for nuclear power station reactor pressure vessel top cap, through extrusion post extrusion elasticity hollow bag when being close to the top cap through the extension post, the inside air of elasticity hollow bag is spouted to the top cap from laminating groove after being extruded, hit the solid particle on top cap surface, can utilize the device to make the air current clear up the top cap owing to rocking of external environment reason production, eliminate the casing particulate matter on top cap surface, avoid dropping the pressure vessel the inside with impurities such as solid particle on the top cap when opening reactor pressure vessel top cap, the degree of safety when the device uses has been improved.

(II), this a fastener for nuclear power station reactor pressure vessel top cap, through metal shrapnel because the elasticity of self pushes out the attaching plate to the outside in laminating groove, the attaching plate produces the contact of bigger area with outside top cap after expanding to the outside, the device rocks and improves the area of contact of collision when leading to breathing the board striking pressure vessel's top cap, reduces the pressure that the striking produced, has reduced between the device because the damage that the collision caused, has improved the life of device.

(III), this a fastener for nuclear power station reactor pressure vessel top cap, through with elastic steel plate along fastening flange slide to the guide block on, elastic steel plate and swing distance between the board reduce the back upwards promote swing board and regulating plate, rotate the benchmark board to the position that is closest to inboard pressure vessel top cap, the attaching plate drives the top cap that the elastic plate downwarping laminated pressure vessel because the gravity of self, can change the appearance according to pressure vessel's top cap and laminate, the adaptation degree of device has been improved, can satisfy the needs of the pressure vessel shell of different appearances.

The fastening flange aligns with the flange on the main body when the top cover of the pressure vessel is connected with the main body, the threaded column is used for penetrating the fastening gasket and the fastening flange and then fixing, and the fastening gasket can play a role in protecting the pressure vessel of the reactor of the nuclear power plant and has protection capability.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic view of the construction of the shim means and the oscillating means of the present invention;

FIG. 3 is a schematic structural view of the joint of the elastic steel plates according to the present invention;

FIG. 4 is a schematic view of a datum plate according to the present invention;

FIG. 5 is a schematic view of the construction of the breathing apparatus of the present invention;

FIG. 6 is a cross-sectional view of the interior of a respiratory device of the present invention;

fig. 7 is a schematic structural view of the internal strut of the respiratory device of the present invention during operation.

In the figure: 1-fastening flange, 2-gasket device, 21-limiting column, 22-lifting plate, 23-fastening gasket, 3-swinging device, 31-swinging plate, 32-swinging disk, 33-counterweight ball, 4-adjusting plate, 41-reference plate, 42-attaching plate, 43-reference groove, 44-elastic plate, 5-breathing device, 51-extending column, 52-breathing plate, 6-guiding block, 7-elastic steel plate, 8-rotating rod, 9-extending groove, 10-extending spring, 11-extending rod, 12-attaching groove, 13-attaching plate, 14-metal elastic sheet, 15-breathing cavity, 16-elastic hollow capsule and 17-extruding column.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a fastener for nuclear power station reactor pressure vessel top cap, includes fastening flange 1, its characterized in that, the outside of fastening flange 1 is provided with:

the gasket device 2 is provided with a limiting column 21, the limiting column 21 is symmetrically arranged on the outer side of the fastening flange 1 and extends into the fastening flange 1, a lifting plate 22 is arranged on the outer side of the limiting column 21, a limiting plate is arranged on the outer side of the limiting column 21 close to the lifting plate 22, a fastening gasket 23 is arranged on the top of the lifting plate 22, and a through hole matched with the fastening flange 1 is formed in the top of the fastening gasket 23;

the swinging device 3 is provided with a swinging plate 31, the top of the fastening gasket 23 is uniformly provided with a swinging disc 32, the top of the fastening gasket 23 is provided with a limit groove matched with the swinging disc 32, and the top of the swinging disc 32 is provided with a counterweight ball 33;

the adjusting plate 4 is provided with a reference plate 41, the top of the reference plate 41 is provided with an attaching plate 42, and the attaching plates 42 are rotatably connected;

respiratory device 5, this respiratory device 5 have extend post 51, extend post 51 and rigging board 42 fixed connection, and the one end that extends post 51 and keep away from rigging board 42 is provided with breathing board 52.

Extension 9 has been seted up to extension column 51's one end, and extension spring 10 is provided with in extension 9's inside, and extension spring 10's one end is provided with extension rod 11, and extension rod 11 extends to the outside one end of extension 9 and is connected with respiratory board 52.

One side of the breathing plate 52, which is far away from the extension column 51, is provided with a fitting groove 12, one side of the inner wall of the fitting groove 12 is rotatably connected with a fitting plate 13, and one side of the inner wall of the fitting groove 12 is connected with the fitting plate 13 through a metal elastic sheet 14.

Breathing chamber 15 has been seted up to breathing plate 52's inside, and the inside of breathing chamber 15 is provided with elasticity hollow bag 16, and the breathing hole has been seted up to one side that elasticity hollow bag 16 kept away from extension post 51, and one side of breathing chamber 15 is through bleeder vent and laminating groove 12 intercommunication.

One side of extending post 51 is provided with the compression column 17, and the extrusion groove with compression column 17 looks adaptation is seted up to one side of respiratory board 52, and the extrusion groove communicates with respiratory cavity 15, and compression column 17 extends to respiratory cavity 15's inside.

When the device is used, when a nuclear power station is installed in a container on the sea, the nuclear power station is easy to shake along with the container, the fastening flange 1 is installed on a top cover of a pressure container, the attaching plate 42 is bent inwards to be close to the top cover, when the nuclear power station shakes along with an external container, the pressure container of a reactor of the nuclear power station shakes along with the external container, the attaching plate 42 swings in the shaking process, the breathing plate 52 collides with the top cover, the extending column 51 squeezes the elastic hollow bag 16 through the squeezing column 17 when approaching to the top cover, air in the elastic hollow bag 16 is squeezed out and then is sprayed to the top cover from the attaching groove 12, solid particles on the surface of the top cover are flushed away, the top cover can be cleaned by utilizing the shaking produced by the device due to the external environment, shell particles on the surface of the top cover are eliminated, impurities such as the solid particles on the top cover are prevented from falling into the pressure container when the top cover of the reactor is opened, the safety degree of the device in use is improved.

The metal elastic sheet 14 pushes the attaching plate 13 out of the attaching groove 12 due to the elasticity of the metal elastic sheet, the attaching plate 13 is in contact with an external top cover after being unfolded outwards, the contact area of collision is increased when the breathing plate 52 collides with the top cover of the pressure container due to shaking of the device, the pressure generated by collision is reduced, the damage caused by collision between the devices is reduced, and the service life of the device is prolonged.

When the top cover of the pressure vessel is connected with the main body, the fastening flange 1 is aligned with the flange on the main body, the threaded column is used for penetrating the fastening gasket 23 and the fastening flange and then fixing, and the fastening gasket 23 can play a role in protecting the pressure vessel of the nuclear power plant reactor during installation and has protection capacity.

Example two

Referring to fig. 1-7, the present invention provides a technical solution: in the first embodiment, a reference groove 43 is formed in a side of the reference plate 41 away from the swinging plate 31, an elastic plate 44 is disposed inside the reference groove 43, and one end of the elastic plate 44 extending to the outside of the reference groove 43 penetrates the attachment plate 42.

The outside of fastening flange 1 is located the below of swing board 31 and is provided with guide block 6, and one side sliding connection elastic steel plate 7 that fastening flange 1 was kept away from to guide block 6, and dwang 8 is passed through at elastic steel plate 7's top and is connected with swing board 31, and the spacing spout with dwang 8 looks adaptation is seted up at elastic steel plate 7's top.

During the use, slide elastic steel plate 7 to guide block 6 along fastening flange 1 on, upwards promote swing board 31 and regulating plate 4 after the distance between elastic steel plate 7 and the swing board 31 reduces, rotate benchmark board 41 to the position that is nearest inboard pressure vessel top cap, attaching plate 42 is because the gravity of self drives the top cap of elastic plate 44 decurrent bending laminating pressure vessel, can change the appearance according to pressure vessel's top cap and laminate, the adaptation degree of device has been improved, can satisfy the needs of the pressure vessel shell of different appearances.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A fastener for a nuclear power plant reactor pressure vessel top cover, comprising a fastening flange (1), characterized in that the outside of the fastening flange (1) is provided with:

the gasket device (2) is provided with a limiting column (21), the limiting column (21) is symmetrically arranged on the outer side of the fastening flange (1) and extends into the fastening flange (1), a lifting plate (22) is arranged on the outer side of the limiting column (21), a limiting plate is arranged on the outer side of the limiting column (21) close to the lifting plate (22), a fastening gasket (23) is arranged at the top of the lifting plate (22), and a through hole matched with the fastening flange (1) is formed in the top of the fastening gasket (23);

the swing device (3) is provided with a swing plate (31), the top of the fastening gasket (23) is uniformly provided with swing discs (32), the top of the fastening gasket (23) is provided with a limiting groove matched with the swing discs (32), and the top of the swing discs (32) is provided with counterweight balls (33);

the adjusting plate (4) is provided with a reference plate (41), the top of the reference plate (41) is provided with a joint plate (42), and the joint plates (42) are rotatably connected;

respiratory device (5), this respiratory device (5) have extension post (51), extend post (51) and rigging board (42) fixed connection, the one end of keeping away from rigging board (42) of extension post (51) is provided with breathing board (52).

2. A fastener for a nuclear power plant reactor pressure vessel head according to claim 1, wherein: reference groove (43) have been seted up to reference plate (41) one side of keeping away from swing board (31), the inside of reference groove (43) is provided with elastic plate (44), laminating board (42) is run through to the outside one end that extends to reference groove (43) elastic plate (44).

3. A fastener for a nuclear power plant reactor pressure vessel head according to claim 1, wherein: the below that the outside of fastening flange (1) is located swing board (31) is provided with guide block (6), one side sliding connection that fastening flange (1) was kept away from in guide block (6) has elastic steel plate (7), dwang (8) are passed through at the top of elastic steel plate (7) and are connected with swing board (31), the spacing spout with dwang (8) looks adaptation is seted up at the top of elastic steel plate (7).

4. A fastener for a nuclear power plant reactor pressure vessel head according to claim 1, wherein: extension groove (9) have been seted up to the one end of extension post (51), the inside of extension groove (9) is provided with extension spring (10), the one end of extension spring (10) is provided with extension rod (11), extension rod (11) extend to the outside one end of extension groove (9) and are connected with breathing board (52).

5. A fastener for a nuclear power plant reactor pressure vessel head according to claim 1, wherein: one side of the breathing plate (52) far away from the extension column (51) is provided with a fitting groove (12), one side of the inner wall of the fitting groove (12) is rotatably connected with a fitting plate (13), and one side of the inner wall of the fitting groove (12) is connected with the fitting plate (13) through a metal elastic sheet (14).

6. A fastener for a nuclear power plant reactor pressure vessel head according to claim 5, wherein: breathing chamber (15) have been seted up to the inside of breathing board (52), the inside of breathing chamber (15) is provided with elasticity hollow bag (16), the breathing hole has been seted up to one side that extension post (51) was kept away from in elasticity hollow bag (16), one side of breathing chamber (15) is through bleeder vent and laminating groove (12) intercommunication.

7. The fastener for a nuclear power plant reactor pressure vessel head as defined in claim 6, wherein: extend one side of post (51) and be provided with extrusion post (17), breathe the extrusion groove of offering with extrusion post (17) looks adaptation in one side of board (52), extrusion groove and breathing cavity (15) intercommunication, extrusion post (17) extend to the inside of breathing cavity (15).