CN110189838B - Electrical penetration device and system for hot chamber and installation method of electrical penetration device and system - Google Patents
Electrical penetration device and system for hot chamber and installation method of electrical penetration device and system Download PDFInfo
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- CN110189838B CN110189838B CN201910522721.1A CN201910522721A CN110189838B CN 110189838 B CN110189838 B CN 110189838B CN 201910522721 A CN201910522721 A CN 201910522721A CN 110189838 B CN110189838 B CN 110189838B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/028—Seals, e.g. for pressure vessels or containment vessels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Engineering & Computer Science (AREA)
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Abstract
The application discloses an electrical penetration device, a system and a method for a hot chamber, wherein the device comprises a hot chamber outer side junction box, a conductor fixing device, a cylinder, an end plate and a hot chamber inner side junction box which are connected in sequence; the hot chamber outer side junction box is provided with a hot chamber outer side connector, and the hot chamber inner side junction box is provided with a hot chamber inner side connector; a shielding component provided with a through hole or a groove for the conductor component or the extension wire of the conductor component to pass through is arranged in the cylinder; the conductor assembly is connected to the conductor fixing device in a sealing way, one end or an extension wire at one end of the conductor assembly extends out of the conductor fixing device to be connected with the hot chamber outside connector, and the other end or an extension wire at the other end penetrates through the shielding assembly to be connected with the hot chamber inside connector. The device has the advantages of high integration level, compact structure, excellent performance, convenient overhaul and maintenance, good radiation protection function, excellent sealing and electrical performance and anti-seismic performance, and can ensure good mechanical integrity and electrical integrity.
Description
Technical Field
The application relates to an electrical penetration technology in the nuclear field, in particular to an electrical penetration device and system for a hot chamber and an installation method thereof.
Background
In the nuclear technical field, a hot cell is a closed space for performing high-radioactivity tests and operations, and is relatively isolated from the surrounding environment by a hot cell shell and a shielding wall. At present, a cable pipe is generally adopted for a hot chamber cable to directly penetrate through a hot chamber shell and a shielding wall body, and the hot chamber cable is locally sealed in a mode of sealing a pipe orifice through sealing filler. The manner in which the cable passes through the shielded wall of the hot chamber has the following disadvantages:
(1) The electrical and sealing properties are not reliable. The sealing filler and the cable are easy to age, the sealing effect is poor, and the electrical and sealing performance cannot be ensured for a long time under severe environmental conditions.
(2) The cable is difficult to replace. The cable is laid by adopting a bent pipe pre-burying mode generally, and once the cable fails, the cable is difficult to maintain and replace.
(3) The sealing performance of the cable penetrating position cannot be detected, and if the hot chamber cannot normally establish the negative pressure running state, the leakage point investigation difficulty is high.
(4) The manipulator cannot be used for remote operation outside the hot chamber, and connection and replacement of cables inside the hot chamber are implemented.
Disclosure of Invention
The application aims to provide an electric penetration device for a hot chamber, which solves the problems of unreliable electric and sealing performance and difficult cable replacement caused by adopting a cable pipe to directly penetrate a hot chamber shell and a shielding wall in the prior art, ensures reliable electric connection of cables inside and outside the hot chamber, and can also effectively prevent radioactive substances from leaking. The application also provides an electric penetration system for the hot chamber and an installation method thereof.
The application is realized by the following technical scheme:
an electrical penetration device for a hot chamber comprises a conductor assembly, a cylinder assembly, a hot chamber outside junction box and a hot chamber inside junction box; the cylinder assembly comprises a cylinder, a conductor fixing device and an end plate, wherein one end of the cylinder is connected with the conductor fixing device, and the other end of the cylinder is connected with the end plate; the hot chamber outer junction box is connected to the conductor fixing device and is connected with the cylinder body at different sides of the conductor fixing device; the connection box at the inner side of the hot chamber is connected to the end plate and is connected with the cylinder body at different sides of the end plate; the hot chamber outside junction box is provided with a hot chamber outside connector, and the hot chamber inside junction box is provided with a hot chamber inside connector; a shielding component for blocking rays is also arranged in the cylinder; the shielding component is provided with a through hole or a groove for the extension wire of the conductor component to pass through; the conductor assembly is connected to the conductor fixing device in a sealing way, and one end of the conductor assembly or an extension wire at one end extends out of the conductor fixing device to be connected with the connector at the outer side of the hot chamber; the other end of the conductor assembly or an extension wire at the other end passes through the shielding assembly to be connected with the connector at the inner side of the hot chamber. In the technical scheme, the conductor fixing device can adopt an end plate flange, a plurality of through holes are formed in the end plate flange, and the conductor component penetrates through the through holes in the end plate flange; the sealing connection of the conductor assembly to the conductor fixing device can be achieved by fixing the conductor assembly to the end plate flange by means of a metal sealing ferrule assembly. And the extension wires of the conductor assembly are respectively welded or connected with the connectors on the outer side and the inner side of the hot chamber in a compression joint mode, the connectors which are connected are arranged on the junction boxes on the outer side and the inner side of the hot chamber, and reliable electric connection with the external cables on the inner side and the outer side of the hot chamber is realized through electric connection of the connectors. The shielding component used for blocking rays is further arranged in the cylinder body, so that workers outside the hot chamber can be effectively guaranteed to be in a safe radiation protection environment.
As a further improvement of the application, the number of the shielding components is one or more, the cylinder body is internally provided with a supporting component, the supporting component comprises a supporting rod, the supporting rod penetrates through all the shielding components and is connected with the conductor fixing device, and all the shielding components are axially fixed through the supporting component.
Preferably, the projections of the through holes and the grooves of all the shielding assemblies on the H plane are not coincident, and the H plane is parallel to the radial direction of the cylinder. In the scheme, the shielding component can adopt a lead shielding block; the supporting component can adopt the supporting rod and the retaining ring, so the core of the scheme is that the lead shielding block for radiation protection is arranged in the extending direction of the body of the electric penetrating device towards the inner side of the embedded sleeve, and the supporting rod, the retaining ring and the like are fixedly connected, so that an extension conductor of the conductor component sequentially passes through the lead shielding blocks in a curved manner in the barrel component of the electric penetrating device, penetrates through the inner side of a direct heat chamber of the whole barrel component, and ensures that the electric penetrating device body has good radiation shielding performance.
Further, a sealing assembly is further arranged between the conductor assembly and the conductor fixing device, and the sealing assembly is used for sealing a gap between the conductor assembly and the conductor fixing device. In this scheme, have the through-channel on the conductor fixing device of barrel subassembly and be the through-hole, the conductor subassembly runs through the through-hole on the transition flange to fix the conductor subassembly on the transition flange through seal assembly, realize the reliable seal of conductor subassembly and penetration piece body.
The utility model provides an electric system of running through for hot chamber, including setting up at the internal pre-buried sleeve pipe of wall, setting up on the wall body pre-weld flange and wear to establish at the internal electric device that runs through of pre-buried sleeve, electric device that runs through is arbitrary for above-mentioned technical scheme an electric device for hot chamber, electric device's conductor fixing device and pre-weld flange connection, and be provided with the sealing washer between conductor fixing device and pre-weld flange, the sealing washer is used for realizing the sealing of the clearance between pre-weld flange terminal surface and the conductor fixing device terminal surface.
Preferably, the embedded sleeve and the cylinder are of a stepped cylindrical structure, and the cylinder is matched with the embedded sleeve, so that the inner diameter of the embedded sleeve at the change position of the outer diameter of the cylinder is correspondingly changed. In this scheme, the barrel subassembly of running through the device has adopted echelonment reducing design, and embedded sleeve also designs into echelonment structure, and it cooperatees with the shape of barrel subassembly, can prevent effectively that the ray from directly penetrating to the hot chamber outside from the gap between barrel subassembly and the embedded sleeve of electric running through the device.
Further, a sealing mechanism is arranged between the outer wall of one side of the cylinder body, which is close to the hot chamber, and the embedded sleeve, and the sealing mechanism is a sealing ring or a sealing gasket. In this scheme, at the electric barrel subassembly externally mounted who runs through the device and be located the hot chamber inboard a sealed pad or sealed pad, can seal the gap between electric barrel subassembly of running through the device and the pre-buried sleeve, prevent that dust, radioactive aerosol, water etc. from getting into among the pre-buried sleeve, pollute the surface of electric device of running through, for the follow-up operation maintenance of device, retire processing and provide convenience.
Further, a first leakage detection hole and a second leakage detection hole are formed in the conductor fixing device; the first leakage detection hole is used for detecting the sealing performance between the conductor assembly and the conductor fixing device, and the second leakage detection hole is used for detecting the sealing performance between the conductor fixing device and the pre-welded flange. In the technical scheme, the flange bolts are adopted between the electric penetrating device and the embedded sleeve, the sealing rings are adopted between the electric penetrating device and the embedded sleeve to seal, 2 sealing detection interfaces are designed on the end plate flange, the sealing performance of the electric penetrating device body and the sealing performance of the electric penetrating device mounting surface are detected respectively, and sealing monitoring is achieved.
The application also provides an installation method of the electrical penetration system for the hot chamber, which comprises the following steps:
s11, inserting the conductor assembly into the conductor fixing device, and sealing and connecting the conductor assembly on the conductor fixing device;
s12, fixing the shielding component on the supporting rod, and fixedly connecting one end, close to the conductor component, of the supporting rod on the conductor component;
s13, penetrating an extension wire of the conductor assembly through the shielding assembly;
s14, sleeving the cylinder body on the outer sides of the support rods and the shielding assembly, and connecting the cylinder body with one side, close to the shielding assembly, of the fixing device;
s15, enabling an extension wire at one end or one end of the conductor assembly to pass through the junction box at the outer side of the hot chamber and be connected with the connector at the outer side of the hot chamber; the extension wire at the other end of the conductor assembly or the other end of the conductor assembly passes through the junction box at the inner side of the hot chamber and is connected with the connector at the inner side of the hot chamber; finally, installing 2 connectors on the corresponding junction boxes to form an electric penetration device;
s16, sleeving an upper sealing ring or a sealing gasket on the outer wall of one side of the cylinder body close to the hot chamber, and mounting a sealing ring on the side surface of one side of the fixing device close to the pre-welding flange;
and S17, enabling the electric penetrating device to penetrate through the embedded sleeve, and fixing the electric penetrating device on the embedded sleeve.
Compared with the prior art, the application has the following advantages and beneficial effects:
1. the electric penetration device for the hot chamber adopts an integrated structural design, has compact overall structure and high integration level, and has high integration of electric functions, mechanical functions and radiation protection functions. The whole electric penetration device is designed to facilitate on-site installation, detection and maintenance.
2. The electrical penetration device for the hot chamber supports conductor assemblies of various specification types, and has strong universality and expandability.
3. The electric penetrating device for the hot chamber is internally provided with a plurality of shielding lead blocks, and the curve of the extension lead of the conductor assembly passes through staggered holes (or slots) on different shielding lead blocks. The electrical penetration device body is effectively ensured to have good radiation shielding performance.
4. According to the embedded sleeve of the electrical penetration system for the hot room and the barrel assembly of the electrical penetration device, the stepped reducing design is adopted, rays can be effectively prevented from directly radiating to the outer side of the hot room from a gap between the barrel of the electrical penetration device and the embedded sleeve, and good shielding performance is ensured between the electrical penetration device and an interface of the embedded sleeve.
5. The electric penetration device is connected with an external cable by adopting a special connector, the connector on the inner side of the hot chamber can adopt a connector capable of being operated remotely, and the connection and replacement operation of the cable can be carried out by a manipulator. This approach is very convenient for service and maintenance work after operation.
6. The electric penetration device and the hot chamber body are sealed by adopting a double-channel O-shaped (or C-shaped) rubber (or metal) sealing ring, and reliable sealing performance is ensured by adopting a sealed redundant design.
7. The electrical penetration device body, the seal between the electrical penetration device and the hot chamber wall body can be detected, and the detection can be carried out periodically during installation and operation. The sealing performance of the electric penetration device is effectively ensured.
8. The clamping sleeve sealing component is adopted to fix the conductor component at the flange of the end plate and double-way metal sealing is realized, and the conductor component is detachable, replaceable and overhaulable and has good sealing effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present application;
FIG. 2 is a side view of the outside of the hot cell;
fig. 3 is a cross-sectional view of fig. 2C-C.
Reference numerals and corresponding part names:
1. an outdoor side connector; 2. a junction box outside the hot chamber; 3. a conductor assembly; 4. a seal assembly; 5. a conductor fixing device; 6. a suspension ring screw; 7. a seal ring; 8. a support rod; 9. a retainer ring; 10. a shielding assembly; 11. a sealing mechanism; 12. a junction box inside the hot chamber; 13. a hot cell inner side connector; 14, embedding a sleeve; 15. a cavity; end plates; 17. pre-welding a flange; 18, a cylinder; 19. A first leak detection hole; 20. and a second leak detection hole.
Detailed Description
In the technical field of cores, a hot chamber cable in the prior art generally adopts a cable pipe to directly penetrate through a hot chamber shell and a shielding wall body, and is partially sealed in a mode of sealing a pipe orifice by sealing filler. The cable penetrates through the heat chamber shielding wall, and has the following defects: (1) The electrical and sealing performance is unreliable, the sealing filler and the cable are easy to age, the sealing effect is poor, and the electrical and sealing performance cannot be ensured for a long time under severe environmental conditions; (2) The cable is difficult to replace, the cable is laid in a mode of pre-burying an elbow, and once the cable fails, the cable is difficult to maintain and replace; (3) The sealing performance of the cable penetration part cannot be detected, and if the hot chamber cannot normally establish the negative pressure running state, the leakage point is difficult to check; (4) The manipulator cannot be used for remote operation outside the hot chamber, and connection and replacement of cables inside the hot chamber are implemented.
In fact, the electrical penetration device is used as a channel for penetrating various cables through the pressure boundary of the radioactive operation space such as a hot room wall, a glove box and the like, needs to meet the requirements of related electrical performance, needs to ensure reliable sealing performance, and can still maintain electrical continuity and the integrity of the pressure boundary and prevent radioactive substances from leaking even under severe working conditions such as high temperature, high pressure, high humidity, high radiation, high corrosion and the like and extreme conditions such as earthquake accidents and the like; further, it is preferable to provide for remote operation between the electrical penetration device and the external cable assembly in the hot room for installation and removal.
In order to solve the problem of unreliable electrical and sealing performance in the prior art and at least realize part of the functional requirements of the electrical penetration device, the application provides an electrical penetration device for a hot chamber, a system and an installation method thereof. The product not only can ensure various electric, mechanical, sealing and radiation protection functions of equipment under the conditions of high temperature, high humidity, high pressure, high irradiation and chemical corrosion, but also is convenient for on-site installation, detection and maintenance and replacement after operation. Furthermore, a special connector is selected, the device can also have a remote operation function, and the remote operation can be performed outside the hot chamber through the manipulator, so that the connection and replacement operation of the cable assembly and the electric penetration device in the hot chamber can be realized.
For the purpose of making apparent the objects, technical solutions and advantages of the present application, the present application will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present application and the descriptions thereof are for illustrating the present application only and are not to be construed as limiting the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the application. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order not to obscure the application.
Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the application. Thus, the appearances of the phrases "in one embodiment," "in an example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the description of the present application, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present application.
[ example 1 ]
The electrical penetration device for the hot chamber in the embodiment is special electrical equipment for penetrating cables such as power supply, instrument control and communication through the hot chamber shell and the shielding wall, has good pressure bearing, ageing resistance, irradiation resistance and excellent sealing performance, can ensure reliable electrical connection of cables inside and outside the hot chamber, and can also effectively prevent radioactive substances from leaking. Further, when the connector capable of being remotely controlled in the prior art is selected, the manipulator can be used for remotely carrying out connector plugging and unplugging and overall replacement operations of cables and equipment in the radioactive space inside the hot chamber, so that the safety of operators is ensured.
As shown in fig. 1-3, an electrical penetration system for a hot chamber includes an embedded sleeve 14 disposed in a wall 15, a pre-welded flange 17 disposed on the wall 15, and an electrical penetration device penetrating the embedded sleeve 14. The left end of the electric penetrating device is far away from the hot chamber and is connected with the pre-welding flange 17, the right end of the electric penetrating device is close to the hot chamber and is positioned in the hot chamber or is positioned in one end of the embedded sleeve 14 close to the hot chamber.
The structure of the electrical penetration device is described in detail below.
An electrical penetration device for a hot chamber comprises a conductor assembly 3, a cylinder assembly, a hot chamber outside junction box 2 and a hot chamber inside junction box 12; the barrel assembly comprises a barrel 18, a conductor fixing device 5 and an end plate 16, wherein the left end of the barrel 18 is connected with the right side of the conductor fixing device 5, and the right end is connected with the left side of the end plate 16; the hot cell outside junction box 2 is connected to the left side of the conductor fixture 5, and the hot cell inside junction box 12 is connected to the right side of the end plate 16; the hot chamber outside junction box 2 is provided with a hot chamber outside connector 1, and the hot chamber inside junction box 12 is provided with a hot chamber inside connector 13; in this embodiment, the conductor fixing device 5 adopts an end plate flange, so that the electrical penetration device for the hot chamber forms a flange assembly type electrical penetration device.
A support assembly and a plurality of shielding assemblies 10 for blocking rays are also arranged in the cylinder 18; the support assembly comprises a support rod 8, which support rod 8 passes through all shielding assemblies 10 and is connected to the conductor fixture 5, through which support assembly all shielding assemblies 10 are axially fixed. The shielding component 10 is provided with a through hole or a groove for the conductor component 3 or the extension wire of the conductor component 3 to pass through. The shielding component 10 is matched with the cylinder body structure, is cylindrical, and is provided with grooves on the circumferential surface of the shielding component 10 when the conductor component 3 or an extension wire of the conductor component 3 needs to pass through the circumferential surface (hereinafter referred to as a wall surface or a side wall), and the grooves penetrate through the left end surface and the right end surface of the shielding component 10, and can be smooth grooves or spiral grooves; when the extension wire of the conductor assembly 3 and the conductor assembly 3 do not need to pass through the circumference surface thereof, a through hole is arranged on the shielding assembly 10, and the through hole also penetrates through the left end surface and the right end surface of the shielding assembly 10; the projections of the through holes and grooves of all the shielding assemblies 10 do not coincide on the H plane, which is any plane parallel to the radial direction of the cylinder 18. The side walls of the shielding assembly 10 are all in contact with the inner wall of the cylinder 18 except for the positions of the grooves so as to block rays and realize radiation protection. The shielding assembly 10 in this embodiment employs a lead shielding block; in other embodiments, the shielding assembly 10 may be made of other radiation-shielding materials, such as lead boron polyethylene, boron-containing polyethylene, and the like. The number and positions of the shielding assemblies 11 are determined according to the calculated requirements of the radiation protection and are positioned by the support assemblies.
The conductor assembly 3 is connected to the conductor fixing device 5 in a sealing way, and the left end or an extension wire at the left end of the conductor assembly 3 extends out of the conductor fixing device 5 to be connected with the hot chamber outer connector 1; the right end of the conductor assembly 3 or an extension wire at the right end is connected through the shielding assembly 10 to the hot room inner connector 13. The extension wire of the conductor assembly refers to the extension wire of the cable inside the conductor assembly, and the conductor assembly 3 is fixed to the end plate flange, so that only the extension wire of the cable inside the conductor assembly passes through the shielding assembly 10. In fig. 1, 1 conductor assembly 3 is shown secured to the end plate flange 5, with only the extension wires of the cable inside it passing through 3 shield assemblies 10. In the implementation process, a plurality of conductor assemblies 3 can be arranged on the end plate flange 5 in a penetrating way, and each shielding assembly 10 can be provided with a plurality of through holes or grooves and can be arranged according to specific requirements; of course, the preferred number of conductor assemblies 3 is 1-3 to ensure tightness. The conductor assembly 3 can adopt conductor assemblies with various specifications, which cover various types of power, instrument control, coaxiality and the like, and can meet the condition that various types of cables penetrate through the pressure boundary of the hot chamber.
The conductor assembly 3 is hermetically connected to the conductor fixing device 5 in the following specific implementation manner: a sealing assembly 4 is further arranged between the conductor assembly 3 and the conductor fixture 5, said sealing assembly 4 being used for sealing a gap between the conductor assembly 3 and the conductor fixture 5.
When the electric penetration device adopts the structure, the specific mode of the electric penetration device and the embedded sleeve 14 is as follows: the left end of the cylinder 18 is connected with an end plate flange; the left end of the end plate flange is connected with the hot chamber outside connector 1, and the right end of the end plate flange is connected with the pre-welded flange 17; the right end of the cylinder is connected with an end plate 16 which is positioned in one end of the embedded sleeve 14 close to the hot chamber. A sealing ring 7 is arranged between the end plate flange and the pre-welding flange 17, and the sealing ring 7 is used for sealing a gap between the end surface of the pre-welding flange 17 and the end surface of the conductor fixing device 5. A sealing mechanism 11 is further arranged between the outer wall of the right end of the cylinder 18 and the embedded sleeve 14, and the sealing mechanism 11 is a sealing ring or a sealing gasket. Wherein: the sealing ring 7 between the right side of the end plate flange 5 and the embedded sleeve 14 can form a sealing cavity between two sealing rings of the double sealing ring 7 and the double sealing ring 7; the leak detection holes can be designed to detect the sealing performance between the end plate flange and the embedded sleeve 14. A sealing ring or gasket can also be arranged between the outer wall of the right end of the cylinder 18 and the embedded sleeve 14. In this embodiment, the seal ring 7 is preferably a double O-ring (or C-ring) rubber seal ring or a double O-ring (or C-ring) metal seal ring.
The conductor fixing device 5 is provided with a first leakage detection hole 19 and a second leakage detection hole 20; the first leakage detection hole 19 is used for detecting the sealing performance between the conductor assembly 3 and the conductor fixing device 5, and the second leakage detection hole 20 is used for detecting the sealing performance between the conductor fixing device 5 and the pre-welding flange 17.
The embedded sleeve 14 and the cylinder 18 are of stepped cylindrical structures, and the cylinder 18 is matched with the embedded sleeve 14, so that the inner diameter of the embedded sleeve 14 is correspondingly changed at the position where the outer diameter of the cylinder 18 is changed. The diameter of the left side of the embedded sleeve 14 and the diameter of the cylinder 18 are large, and the diameter of the right side of the embedded sleeve is small; the inner diameter of the embedded sleeve 14 at the position of changing the outer diameter of the cylinder 18 is correspondingly changed to adapt to the change of the cylinder 18, the cylinder assembly of the penetrating device adopts a sectional and stepped reducing design, the embedded sleeve 14 is also designed into a stepped structure, and the embedded sleeve is matched with the shape of the cylinder assembly, so that rays can be effectively prevented from directly radiating to the outer side of a hot chamber from a gap between the cylinder assembly and the embedded sleeve of the electric penetrating device.
The specific structure and principle of the present application will be described in detail below by taking the electrical penetration device in which 1 conductor assembly 3 and 3 lead shield blocks are mounted in fig. 1 as an example:
the electric penetration device mainly comprises parts such as a hot chamber outside connector 1, a hot chamber outside junction box 2, a conductor assembly 3, a sealing assembly 4, a cylinder assembly, a supporting rod 8, a check ring 9, a lead shielding block, a hot chamber inside junction box 12, a hot chamber inside connector 13 and the like.
The cylinder assembly penetrates through the wall body 15 of the whole pressure boundary, the cylinder assembly consists of an end plate flange 5, a cylinder 18 and an end plate 16, the cylinder assembly is connected with a pre-welded flange 17 on the wall body through bolts, and a double-channel O-shaped (or C-shaped) rubber (or metal) sealing ring 7 is adopted between the cylinder assembly and the wall body for sealing. The lead shielding blocks are uniformly arranged at intervals in the barrel assembly through the supporting rods 8, and the retainer rings 9 are adopted for axially positioning the lead shielding blocks 10. The lead shielding block is provided with grooves or through holes for the cable to pass through, and the grooves and the through holes of the lead shielding block are staggered in position, so that the effective shielding thickness is ensured. The number and positions of the lead shielding blocks are determined according to the calculation requirements of radiation protection and are positioned through the support assembly.
The conductor assembly 3 mainly consists of an insulating coated conductor, a sealing module and a stainless steel protective sleeve. The type of the conductor component covers various types such as power, instrument control, coaxiality and the like, and can meet the penetration pressure boundary of various types of cables. The supporting component in this embodiment includes a supporting rod 8, a retainer ring 9, and a fastener, where the supporting rod 8 passes through a through hole on the shielding component 10 and completes supporting and positioning of the shielding component 10 through the retainer ring 9 and the fastener, specifically, two sides of the shielding component 10 are limited by the retainer ring 9, and the retainer ring 9 is sleeved on the supporting rod 8 and then fixed on the supporting rod 8 by the fastener, and the fastener includes but is not limited to a screw, a bolt, and a stud. Wherein the support rods 8 in the support assembly may further pass through the shielding assembly 10 in sequence in the form of stepped shafts. The shielding component 10 is provided with spiral grooves or holes for the extending wires of the large-specification conductor component 3 or the small-specification conductor component 3 to penetrate, the positions of the grooves or holes on the shielding component 10 are staggered, and the extending wires of the conductor components in the electric penetrating device penetrate through all the shielding components 10 at a proper angle so as to ensure that the shielding performance on any straight line penetrating through the device meets the radiation protection requirement.
The conductor assembly 3 penetrates through the end plate flange 5 of the barrel assembly, and the sealing assembly 4 is adopted to realize double-way metal sealing between the conductor assembly 3 and the end plate flange 5 of the barrel assembly. The extension wires of the conductor assembly 3 positioned at the inner side of the hot chamber sequentially pass through the through holes of the lead shielding blocks, extend into the hot chamber internal junction box 12 and are connected with the hot chamber internal connector 13, so that reliable electrical connection at the inner side of the hot chamber is realized. The hot indoor junction box 12 is mounted to the end plate 16 of the cylinder assembly by bolts, and the hot indoor connector 13 is mounted on the cover plate of the hot indoor junction box 12, and can realize the function of remote operation by using a manipulator outside the hot room when a connector capable of remote operation is selected. In this way, the electrical penetration device achieves termination with the inner conductor assembly 3 using the dedicated hot cell outer connector 1 and hot cell inner connector 13 and achieves quick connection with the external cable.
The conductor assembly 3 mainly consists of an insulating coated conductor (i.e. a cable), an insulating medium block and an armoured sheath, wherein the armoured sheath is coated outside the cable, and the insulating medium block is filled between the armoured sheath and the cable. The types of the cable can comprise the types of instrument control, power, twisted pair, coaxial, triaxial, optical fiber and the like, and can meet the penetration pressure boundary of various types of cables. The conductor assembly 3 can be independently installed or mixed, has various specifications, covers various types of power, instrument control, coaxiality and the like, and can meet the penetration pressure boundary of various types of cables. In this embodiment, a number of different numbers and sizes of conductor assemblies 3 may be used and mounted on the end plate flange 5 by the seal assembly 4. The conductor component 3 penetrates through the end plate flange 5, metal sealing between the conductor component and the end plate flange 5 is achieved through the sealing component 4, the sealing component 4 mainly comprises a compression nut, a rear clamping sleeve, a compression ring, a front clamping sleeve and the like which are sequentially arranged, the sealing component 4 is used for achieving sealing of a gap between the conductor component 3 and the end plate flange 5, the compression nut is used for producing sealing specific pressure as a person skilled in the art, the rear clamping sleeve is extruded to continuously transmit pressure to the compression ring, the compression ring transmits pressure to the front clamping sleeve, the front clamping sleeve is deformed finally, first sealing between the conductor component 3 and the end plate flange 5 is achieved, and the rear clamping sleeve is deformed under the combined action of the compression nut and the compression ring, so that second sealing between the conductor component 3 and the end plate flange 5 is achieved. A small hole is designed on any point of the circumference of the compression ring and is used as a leakage detection hole, the leakage detection hole on the compression ring is positioned between the first seal and the second seal, and the detection of the sealing performance of the double-channel metal clamping sleeve can be realized through the design of the leakage detection hole. The sealing assembly is sealed by adopting a metal clamping sleeve, so that the corresponding sealing effect can be realized, and meanwhile, the conductor assembly 3 is fixed on the end plate flange 5 by providing sealing pretightening force through the compression nut, namely, the sealing assembly actually plays a role in fixation. The seal assembly 4 may be designed on either side of the end plate flange 5, as desired.
The hot chamber outside junction box 2 is mounted on an end plate flange 5 of the cylinder assembly through bolts, the hot chamber outside connector 1 is mounted on a cover plate of the hot chamber outside junction box 2, and a hot chamber outside extension wire of the conductor assembly 3 is connected with the hot chamber outside connector 1. Thereby a reliable electrical connection of the inside of the hot cell is achieved.
The sealing mechanism 11 between the outer wall of the right end of the cylinder 18 and the embedded sleeve 14 adopts an O-shaped gasket (ring), and the sealing mechanism 11 is arranged on the outer side of the cylinder assembly and is used for sealing a gap between the cylinder assembly and the embedded sleeve, so that radioactive aerosol is effectively prevented from entering the gap, the outer surface of the cylinder assembly is polluted, and convenience is brought to subsequent operation maintenance and retired treatment of the device.
On the basis of the embodiment, the electrical penetration system can be further improved,
as shown in fig. 3, two leak detection holes in the end plate flange 5 of the cartridge assembly: a second leak 20 and a first leak 19; the second leakage detection hole 20 can detect the sealing performance of a double-channel O-shaped (or C-shaped) rubber (or metal) sealing ring between the end plate flange 5 and the mating flange of the embedded sleeve 14, and the first leakage detection hole 19 can detect the sealing performance of a double-channel metal sealing formed between the conductor assembly 3 and the end plate flange 5. The sealing performance of the electric penetration device can be detected regularly, the sealing performance is ensured to be within effective monitoring, the completeness of the pressure boundary is ensured, and the radioactive substances are prevented from leaking.
Because the sealing ring 7 between the right side of the end plate flange 5 and the embedded sleeve 14 can adopt a double-way sealing ring 7, when the second detection hole 20 is arranged, a sealing cavity formed between two sealing rings of the double-way sealing ring 7 is communicated with the second detection hole 20; likewise, the sealing assembly 4 realizes double-path metal sealing of the gap between the conductor assembly 3 and the end plate flange 5, and when the first leakage detection holes 19 are arranged, a sealing cavity between the double-path metal sealing is communicated to the first leakage detection holes 19.
The device and the system of the embodiment have the following characteristics:
the structural design of the flange assembly ensures that the assembly steps of the device assembly are simple, and the device assembly has good maintenance performance;
the modularized design is adopted, such modules as an electrical function, a shielding function, a sealing function and a remote operation function are designed, and the functions are integrated, so that the independence of the functions is ensured, and the reliability of the equipment is improved;
the realization of the electrical function is realized through the conductor component and the connector, and the application of the connector facilitates the field operation and maintenance;
the shielding function is realized by a plurality of lead shielding blocks, the arrangement and the perforating positions of the lead shielding blocks fully consider the radiation protection requirement, and the good shielding effect is ensured;
the application of the barrel assembly and the embedded sleeve stepped structure also ensures that the gap between the barrel assembly and the embedded sleeve has enough shielding thickness;
when the connector capable of being remotely operated is selected, the hot chamber side connector has a remote operation function, and remote operation of equipment is realized.
In summary, the electrical penetration device for the hot chamber of the embodiment has the advantages of reasonable structure, reliable performance, convenient overhaul and maintenance, and has special requirements of good high temperature resistance, high pressure resistance, irradiation resistance, earthquake resistance and the like, can ensure good mechanical integrity and electrical integrity under the environmental conditions in the pressure boundary of the hot chamber, and can further utilize the manipulator to finish the connection and replacement operation of the cables on the inner side of the hot chamber outside the hot chamber. The device can satisfy the functional requirement that the cable runs through pressure boundary.
The embodiment also provides an installation method of the electrical penetration system for the hot chamber, which comprises the following steps:
s11, inserting the conductor assembly 3 into the conductor fixing device 5, and sealing and connecting the conductor assembly 3 on the conductor fixing device 5;
s12, fixing the shielding component 10 on the supporting rod 8, and fixedly connecting one end of the supporting rod 8, which is close to the conductor component 3, on the conductor component 3;
s13, sequentially passing the extension wires of the conductor assembly 3 through the shielding assembly 10 from left to right;
s14, sleeving the cylinder 18 on the outer sides of the support rod 8 and the shielding assembly 10, and connecting the cylinder with one side of the fixing device 5 by adopting welding or threaded connection;
s15, an extension wire at the left end of the conductor assembly 3 (or the left end of the conductor assembly 3) passes through the hot chamber outside junction box 2 and is then connected with the hot chamber outside connector 1 by crimping or welding; the right-end extension wire of the conductor assembly 3 passes through the hot chamber inner junction box 12 and is then connected with the hot chamber inner connector 13 by crimping or welding, and finally, the hot chamber outer connector 1 is installed on the hot chamber outer junction box 2, and the hot chamber inner connector 13 is installed on the hot chamber inner junction box 12; at this time, the electric penetration device is assembled;
s16, sleeving an upper sealing ring or a sealing gasket on the outer wall of one side of the cylinder 18 close to the hot chamber, and mounting a double-way O-shaped ring on one side of the fixing device 5 close to the pre-welding flange 17;
and S17, enabling the electric penetrating device to penetrate through the embedded sleeve 14, and fixing the electric penetrating device on the embedded sleeve 14 by adopting bolts.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (10)
1. An electrical penetration device for a hot chamber is characterized by comprising a conductor assembly (3), a cylinder assembly, a hot chamber outside junction box (2) and a hot chamber inside junction box (12); the cylinder assembly comprises a cylinder (18), a conductor fixing device (5) and an end plate (16), wherein one end of the cylinder (18) is connected with the conductor fixing device (5), and the other end of the cylinder is connected with the end plate (16);
the hot chamber outer junction box (2) is connected to the conductor fixing device (5) and is connected with the cylinder (18) at different sides of the conductor fixing device (5); the hot chamber inner side junction box (12) is connected to the end plate (16) and is connected with the cylinder (18) at different sides of the end plate (16);
a hot chamber outside connector (1) is arranged on the hot chamber outside junction box (2), and a hot chamber inside connector (13) is arranged on the hot chamber inside junction box (12);
a shielding component (10) for blocking rays is also arranged in the cylinder (18); the shielding component (10) is provided with a through hole or a groove for the extension wire of the conductor component (3) to pass through;
the conductor assembly (3) is connected to the conductor fixing device (5) in a sealing way, and one end of the conductor assembly (3) or an extension wire at one end extends out of the conductor fixing device (5) to be connected with the hot chamber outer connector (1); the other end of the conductor assembly (3) or an extension wire at the other end passes through the shielding assembly (10) to be connected with the connector (13) at the inner side of the hot chamber.
2. An electrical penetration device for a hot cell according to claim 1, characterized in that the number of shielding assemblies (10) is one or more, a support assembly is further provided in the cylinder (18), the support assembly comprises a support rod (8), the support rod (8) passes through all shielding assemblies (10) and is connected with the conductor fixing device (5), and all shielding assemblies (10) are axially fixed by the support assembly.
3. An electrical penetration device for hot chambers according to claim 1, characterized in that the projections of the through holes and grooves of all the shielding assemblies (10) on the H plane, parallel to the radial direction of the cylinder (18), do not coincide.
4. An electrical penetration device for a hot chamber according to claim 1, characterized in that a sealing assembly (4) is further arranged between the conductor assembly (3) and the conductor fixture (5), the sealing assembly (4) being adapted to effect sealing of the gap between the conductor assembly (3) and the conductor fixture (5).
5. An electrical penetration device for a hot chamber according to claim 1, characterized in that the cylinder (18) is of stepped cylindrical structure.
6. The utility model provides an electric system of running through for hot chamber, its characterized in that includes pre-buried sleeve (14) of setting in wall body (15), sets up on wall body (15) prewelding flange (17) and wears to establish electric device of running through in pre-buried sleeve (14), electric device of running through for hot chamber is any one of claim 1-5, electric device's conductor fixing device (5) are connected with prewelding flange (17), and are provided with sealing washer (7) between conductor fixing device (5) and prewelding flange (17), sealing washer (7) are used for realizing the sealing of clearance between prewelding flange (17) terminal surface and conductor fixing device (5) terminal surface.
7. The electrical penetration system for a hot room according to claim 6, wherein the pre-buried sleeve (14) and the cylinder (18) are of a stepped cylindrical structure, and the cylinder (18) is matched with the pre-buried sleeve (14) so that the inner diameter of the pre-buried sleeve (14) is correspondingly changed at the position where the outer diameter of the cylinder (18) is changed.
8. An electrical penetration system for a hot chamber according to claim 6, characterized in that a sealing mechanism (11) is further arranged between the outer wall of the side of the cylinder (18) close to the hot chamber and the embedded sleeve (14), and the sealing mechanism (11) is a sealing ring or a sealing gasket.
9. An electrical penetration system for a hot cell according to claim 8, characterized in that the conductor fixing means (5) are provided with a first (19) and a second (20) leak-detection hole; the first leakage detection hole (19) is used for detecting the sealing performance between the conductor assembly (3) and the conductor fixing device (5), and the second leakage detection hole (20) is used for detecting the sealing performance between the conductor fixing device (5) and the pre-welding flange (17).
10. A method of installing an electrical penetration system for a hot cell according to claim 8, comprising the steps of:
s11, inserting the conductor assembly (3) into the conductor fixing device (5), and sealing and connecting the conductor assembly (3) on the conductor fixing device (5);
s12, fixing the shielding component (10) on the supporting rod (8), and fixedly connecting one end, close to the conductor component (3), of the supporting rod (8) on the conductor component (3);
s13, penetrating an extension wire of the conductor assembly (3) through the shielding assembly (10);
s14, sleeving the cylinder (18) on the outer sides of the support rod (8) and the shielding assembly (10), and connecting the cylinder with one side, close to the shielding assembly (10), of the fixing device (5);
s15, an extension wire at one end or one end of the conductor assembly (3) passes through the hot chamber outside junction box (2) and is connected with the hot chamber outside connector (1); passing the other end or the extension wire of the other end of the conductor assembly (3) through the hot chamber inner junction box (12) and connecting with the hot chamber inner connector (13); finally, installing 2 connectors on the corresponding junction boxes to form an electric penetration device;
s16, sleeving an upper sealing ring or a sealing gasket on the outer wall of one side, close to the hot chamber, of the cylinder (18), and mounting a sealing ring (7) on the side surface, close to the pre-welding flange (17), of the fixing device (5);
and S17, enabling the electric penetrating device to penetrate through the embedded sleeve (14), and fixing the electric penetrating device on the embedded sleeve (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910522721.1A CN110189838B (en) | 2019-06-17 | 2019-06-17 | Electrical penetration device and system for hot chamber and installation method of electrical penetration device and system |
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| CN201910522721.1A CN110189838B (en) | 2019-06-17 | 2019-06-17 | Electrical penetration device and system for hot chamber and installation method of electrical penetration device and system |
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| CN110189838B true CN110189838B (en) | 2023-10-03 |
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| CN111766194B (en) * | 2020-07-15 | 2022-03-01 | 中国核动力研究设计院 | Lead penetration piece for high-temperature and high-pressure electrochemical corrosion experiment and assembling method thereof |
| CN114121312B (en) * | 2021-11-19 | 2024-05-07 | 中国核动力研究设计院 | Low-voltage electric penetrating device for thorium-based molten salt experimental reactor |
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| CN104217772A (en) * | 2014-08-15 | 2014-12-17 | 江苏华光电缆电器有限公司 | High-temperature high-pressure electrical penetration assembly |
| CN106098112A (en) * | 2016-07-19 | 2016-11-09 | 江苏华光电缆电器有限公司 | HTGR Helium fan electrical penetration and processing method thereof |
| CN107851467A (en) * | 2015-06-30 | 2018-03-27 | 原子能技术公司 | Electrically run through component for nuclear reactor vessel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217772A (en) * | 2014-08-15 | 2014-12-17 | 江苏华光电缆电器有限公司 | High-temperature high-pressure electrical penetration assembly |
| CN107851467A (en) * | 2015-06-30 | 2018-03-27 | 原子能技术公司 | Electrically run through component for nuclear reactor vessel |
| CN106098112A (en) * | 2016-07-19 | 2016-11-09 | 江苏华光电缆电器有限公司 | HTGR Helium fan electrical penetration and processing method thereof |
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