CN113539544B

CN113539544B - Cladding tube irradiation bearing device and gas filling device and method for same

Info

Publication number: CN113539544B
Application number: CN202110834923.7A
Authority: CN
Inventors: 汪海; 赵文斌; 林瑞霄; 孙胜; 杨文华; 伍晓勇; 蒋国富; 席航; 何文; 黄岗; 张帅; 张慧; 胡晓晖; 徐灵杰; 刘水清; 康长虎; 邓才玉
Original assignee: Nuclear Power Institute of China
Current assignee: Nuclear Power Institute of China
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2023-11-21
Anticipated expiration: 2041-07-23
Also published as: CN113539544A

Abstract

The application discloses a cladding tube irradiation bearing device, which comprises: the device comprises an outer sleeve, a clamping assembly and a fixing assembly, wherein an upper end and a lower end are respectively fixedly arranged at two ends of the outer sleeve; the clamping assembly is arranged in the outer sleeve, and a cladding tube to be subjected to an irradiation test is arranged in the clamping assembly; the clamping assembly is fixed in the shell tube through the fixing assembly. According to the application, the cladding tube to be subjected to the irradiation test is fixed in the outer sleeve through the clamping assembly, and the outer sleeve is arranged in the hole in the irradiation element, so that a stable irradiation environment meeting the test requirement is provided for the irradiation sample. Meanwhile, the sample can be fixed at a specific position of the hole in the element, so that the irradiation sample can meet the requirements of parameters such as neutrons, temperature and the like.

Description

Cladding tube irradiation bearing device and gas filling device and method for same

Technical Field

The application relates to the technical field of material irradiation for research stacks, in particular to a cladding tube irradiation bearing device, a gas filling device and a gas filling method for the cladding tube irradiation bearing device.

Background

In order to confirm the irradiation result of the new material in the irradiation environment and to know the change condition of the internal structure tissue of the material before and after irradiation through the appearance inspection and destructive inspection after irradiation, an irradiation test is a necessary means for realizing the above requirements. Therefore, the research of the irradiation performance of the material is important for the development and research of new materials

The irradiation device is used as an important device for researching the material performance and plays a role of bearing an irradiated sample in the material irradiation process. With the increase of new materials, the existing irradiation resources are limited, and the research and development period of the new materials is prolonged.

However, in the irradiation test at the present stage, the application degree of the holes in the irradiation element is low, so that the waste of the hole channel resources is caused.

Disclosure of Invention

The application aims to provide a cladding tube irradiation bearing device, a gas filling device and a gas filling method for the same, and solves the problem of limited irradiation resources.

The application is realized by the following technical scheme:

a cladding tube irradiation carrier apparatus comprising:

an upper end and a lower end are respectively fixedly arranged at two ends of the outer sleeve;

the clamping assembly is arranged in the outer sleeve, and a cladding tube to be subjected to an irradiation test is arranged in the clamping assembly;

and the clamping assembly is fixed in the outer sleeve through the fixing assembly.

Specifically, one end of the upper end head, which is opposite to the outer sleeve, is set as the upper end of the bearing device, and one end of the lower end head, which is opposite to the outer sleeve, is set as the lower end of the bearing device;

the fixing assembly includes:

the support rod is arranged between the clamping assembly and the lower end head, and two ends of the support rod respectively abut against the clamping assembly and the lower end head;

the elastic component is arranged between the clamping component and the upper end head, and two ends of the elastic component are respectively abutted against the clamping component and the upper end head.

Preferably, the clamping assembly comprises at least one clamping block assembly comprising:

two arc clamping plates which can be spliced into a cylindrical structure;

the clamping plate sleeves are fixedly arranged at two ends of the arc-shaped clamping plate and apply constraint force to the arc-shaped clamping plate;

the cladding tube is arranged between the two arc-shaped clamping plates;

wherein the length of the arc clamping plate is larger than the length of the cladding tube, and the inner diameter of the arc clamping plate is larger than the outer diameter of the cladding tube.

As an embodiment, if the number of the clamping block assemblies is not less than 2, a plurality of the clamping block assemblies are coaxially disposed, and the clamping assembly further includes:

two-way fixed block, adjacent two the clamp splice subassembly is passed through two-way fixed block connects, two-way fixed block includes:

a straight tube inserted into the cladding tube;

and the annular bulge is arranged in the middle of the straight pipe, and the outer annular surface of the annular bulge is corrugated and is in facial line contact with the inner side of the outer sleeve.

Specifically, the bearing device further comprises a detection component for detecting temperature and neutron quantity, and the detection component is fixedly arranged in the outer sleeve;

the two detection assemblies are at least two, wherein two ends of one detection assembly are respectively connected with the clamping assembly and the supporting rod, and two ends of the other detection assembly are respectively connected with the clamping assembly and the elastic assembly.

As another embodiment, when the number of the clamping assemblies is not less than two, the number of the detecting assemblies is three, the three detecting assemblies are respectively arranged at the upper section, the middle section and the lower end of the outer sleeve, and two ends of the detecting assembly positioned at the middle section are respectively connected with two adjacent clamping assemblies.

Specifically, the detection assembly includes:

a detector box;

a detector cover for closing the detector box and detachably connecting with the detector box;

the temperature measuring element is fixedly arranged on the outer side face of the detector box;

and a neutron detection sheet disposed inside the detector box;

the bottom of detector box with the top of detector lid all is provided with the counter bore, detection subassembly with connect through one-way fixed block between the clamping component, one-way fixed block includes:

one end of the straight rod is inserted into the counter bore of the detection assembly, and the other end of the straight rod is inserted into the cladding tube;

and the circular ring is arranged in the middle of the straight rod, and the outer circular surface of the circular ring is contacted with the inner side surface of the outer sleeve.

Specifically, the elastic component includes:

the upper end of the movable rod is inserted into the counter bore in the upper end head and is fixed with the counter bore;

the lower end of the moving rod is inserted into the supporting cylinder and can slide up and down along the supporting cylinder;

the upper end of the elastic piece is fixedly connected with the upper section of the movable rod, and the lower end of the elastic piece is fixedly connected with the upper end of the supporting cylinder.

A gas filling device for a cladding tube irradiation carrier device,

the carrying device further comprises:

the air hole is arranged in the lower end head and used for communicating the inside of the outer sleeve;

plugging the air holes;

the gas filling device includes:

the bearing device is arranged in the cylinder body, and the upper end head is connected with the bottom cover;

the first end of the driving rod penetrates through the end cover to extend into the cylinder body, and the plug is arranged on the driving rod;

the driving nut is in threaded connection with the driving rod and drives the driving rod to move towards the inside of the cylinder body and seal the air hole;

and one end of the air pipe opening is communicated with the inside of the cylinder body, and the other end of the air pipe opening is communicated with the vacuum pump/air bottle.

The gas filling method of the cladding tube irradiation bearing device comprises the following specific steps of:

after the assembly of the cladding tube irradiation bearing device is completed, the upper end head and the lower end head are welded with the outer sleeve;

opening the end cover, and fixing the upper end head with the bottom cover;

installing the plug on the driving rod, arranging the plug corresponding to the air hole and reserving a gap;

the inside of the cylinder body is communicated with the vacuum pump and the gas bottle through arranging a plurality of gas pipe openings or connecting a three-way valve;

carrying out vacuum treatment on the inside of the cylinder, closing the vacuum pump when the pressure is lower than a set value, and filling gas into the inside of the cylinder through the gas bottle;

when the pressure value is higher than the set value, closing the gas bottle and carrying out vacuum treatment on the cylinder body through the vacuum pump;

repeating the vacuum treatment operation and the gas filling operation to finally fill the cylinder with gas;

the driving rod moves inwards and plugs the plug into the air hole;

and opening the end cover, taking out the bearing device and welding the blockage.

Compared with the prior art, the application has the following advantages and beneficial effects:

the cladding tube to be subjected to the irradiation test is fixed in the outer sleeve through the clamping assembly, and the outer sleeve is arranged in the hole in the irradiation element, so that a stable irradiation environment meeting the test requirement is provided for the irradiation sample. Meanwhile, the sample can be fixed at a specific position of the hole in the element, so that the irradiation sample can meet the requirements of parameters such as neutrons, temperature and the like.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the application and together with the description serve to explain the principles of the application.

Fig. 1 is a schematic structural view of a cladding tube irradiation carrier according to the present application.

Fig. 2 is a partial view of i in fig. 1.

Fig. 3 is a partial view of ii in fig. 1.

Fig. 4 is a partial view of iii in fig. 1.

Fig. 5 is a partial view of iv of fig. 1.

Fig. 6 is a schematic view of the structure of the elastic assembly according to the present application.

Fig. 7 is a schematic view of the structure of the lower head according to the present application.

Fig. 8 is a schematic view of the structure of the upper head according to the present application.

Fig. 9 is a schematic structural view of a bidirectional fixing block according to the present application.

Fig. 10 is a schematic structural view of a unidirectional fixing block according to the present application.

Fig. 11 is a schematic view of the splint sleeve according to the present application.

Fig. 12 is a schematic view of the structure of a probe assembly according to the present application.

Fig. 13 is a cross-sectional view of a gas filling device for a cladding tube irradiation carrier according to the application.

Fig. 14 is a schematic view of the structure of a gas filling device for a cladding tube irradiation carrier according to the application.

Reference numerals: the device comprises a 1-upper end socket, a 2-elastic component, a 3-detection component, a 4-cladding tube, a 5-clamping plate sleeve, a 6-bidirectional fixed block, a 7-arc clamping plate, an 8-unidirectional fixed block, a 9-outer sleeve, a 10-supporting rod, a 11-lower end socket, a 101-driving rod, a 102-driving nut, a 103-end cover, a 104-cylinder, a 105-supporting table, a 106-supporting seat, a 107-gas pipe orifice, a 108-bottom cover, a 21-moving rod, a 22-elastic piece, a 23-pressing block, a 24-supporting cylinder, a 31-detector cover, a 32-temperature measuring element and a 33-detector box.

Detailed Description

The present application will be described in further detail with reference to the drawings and embodiments, for the purpose of making the objects, technical solutions and advantages of the present application more apparent. It is to be understood that the specific embodiments described herein are merely illustrative of the substances, and not restrictive of the application.

It should be further noted that, for convenience of description, only the portions related to the present application are shown in the drawings.

Embodiments of the present application and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1

A cladding tube irradiation carrier comprising: the device comprises an outer sleeve 9, a clamping assembly and a fixing assembly, wherein an upper end head 1 and a lower end head 11 are respectively fixedly arranged at two ends of the outer sleeve 9; the clamping assembly is arranged in the outer sleeve 9, and a cladding tube 4 to be subjected to an irradiation test is arranged in the clamping assembly; the clamping component is fixed in the outer sleeve through the fixing component.

The outer sleeve 9 is sealed through the upper end head 1 and the lower end head 11, then the cladding tube 4 is arranged in the clamping assembly, and the cladding tube 4 is fixed in a certain position of the outer sleeve 9 through the cooperation of the clamping assembly and the fixing assembly, so that the sample of the cladding tube 4 to be irradiated is fixed at a certain axial position, the position of the sample in the irradiation device is ensured not to change, and the irradiation test of the cladding tube 4 is realized.

In addition, in this embodiment, since the sleeve is intended to be inserted into the hole in the element, it is necessary to ensure that the diameter of the outer sleeve 9 is not greater than the inner diameter of the hole in the element.

Example two

This embodiment includes the structure in the first embodiment.

The bearing device is vertically arranged in the hole in the element, so that the upper end of the bearing device is required to be lifted and fixed to fix the position of the whole bearing device, and therefore, one end of the upper end head 1 is set to be the upper end of the bearing device, and one end of the lower end head 11 is set to be the lower end of the bearing device.

Namely, the end of the upper end head 1 relative to the outer sleeve 9 is set as the upper end of the bearing device, and the end of the lower end head 11 relative to the outer sleeve 9 is set as the lower end of the bearing device;

the fixing assembly includes a support rod 10 and an elastic assembly 2.

The support rod 10 is arranged between the clamping assembly and the lower end 11, and two ends of the support rod 10 are respectively abutted against the clamping assembly and the lower end 11;

the elastic component 2 is arranged between the clamping component and the upper end head 1, and two ends of the elastic component 2 are respectively abutted against the clamping component and the upper end head 1.

The clamping assembly needs to be stably fixed in the outer sleeve, so that the aim is fulfilled by arranging the fixing assembly.

Meanwhile, in order to enable the support rod 10 to be stably connected with the lower end head 11, a counter bore is formed in the lower end head 11, and the lower end of the support rod 10 is inserted into the counter bore to achieve fixation.

Likewise, in order to stably connect the elastic component 2 with the upper end 1, a counter bore is provided on the upper end 1, and the upper end of the elastic component 2 is inserted into the counter bore to realize fixation.

In the present embodiment, the connection between the support rod 10 and the clamping assembly and the connection between the elastic assembly 2 and the clamping assembly can be varied, and examples are as follows:

1. counter bores are also formed at both ends of the clamping assembly, and the support rod 10 and the elastic assembly 2 are respectively inserted into the clamping assembly, thereby realizing fixation.

2. The fixation is directly achieved by means of abutment, i.e. the distance between the upper end of the support rod 10 and the lower end of the elastic assembly 2 is set to be no greater than the length of the clamping assembly, so that the elastic assembly 2 is in a slightly compressed state, and fixation is achieved.

The elastic assembly 2 is provided in this embodiment because the clamping assembly and the cladding tube 4 will expand thermally when irradiated in the stack, and displacement of the clamping assembly can be counteracted by providing the elastic assembly 2 to ensure safety of the device.

Two examples are provided, as follows:

1. the elastic component 2 includes movable block, supporting shoe and elastic component 22, and the both ends of elastic component 22 are respectively with movable block and supporting shoe fixed connection, and movable block and upper end 1 fixed connection, supporting shoe are connected or are supported with the centre gripping subassembly.

With the above structure, when the holding member is extended, the supporting block is moved upward, and then the elastic member 22 is compressed, thereby shortening the distance between the moving block and the supporting block.

However, with the above structure, there is a problem that the moving block and the supporting block are not coaxial, so that the offset occurs, and thus the moving block and the supporting block are optimized as follows.

2. The elastic assembly 2 includes: a moving rod 21, a support cylinder 24 and an elastic member 22.

The upper end of the movable rod 21 is inserted into a counter bore in the upper end head 1 and fixed with the counter bore;

the lower end of the moving rod 21 is inserted into the support cylinder 24 and can slide up and down along the support cylinder 24;

the upper end of the elastic piece 22 is fixedly connected with the upper section of the movable rod 21, and the lower end of the elastic piece 22 is fixedly connected with the upper end of the supporting cylinder 24.

The upper end of the movable rod 21 is connected with a counter bore in the upper end head 1, the lower end of the supporting cylinder 24 is connected with or abutted against the clamping assembly, the movable block and the supporting block are optimized and abstracted into a rod body and a cylinder body 104, so that the movable rod 21 can slide up and down in the supporting cylinder 24, the guide function is realized through the movable rod 21 and the supporting cylinder 24 which are coaxially arranged, and the offset is avoided.

Meanwhile, in order to facilitate the connection of the elastic member 22, an annular plate may be fixedly disposed at the upper portion of the moving rod 21, and a pressing block 23 may be fixedly disposed at the upper end of the supporting rod 10, so that the elastic member 22 is fixedly connected between the annular plate and the pressing block 23.

The elastic member 22 may have various structures, such as: springs, resilient metal sheets, etc.

The aperture of the supporting cylinder 24 is larger than the diameter of the moving rod 21, the compressing block 23 is provided with a hole, the aperture is larger than the diameter of the moving rod 21 and smaller than the outer diameter of the elastic piece 22.

Example III

The present embodiment includes the structures of the first embodiment and the second embodiment.

The clamping assembly comprises at least one clamping block assembly, and the clamping block assembly comprises two arc clamping plates 7 and a clamping plate sleeve 5 which can be spliced into a cylindrical structure.

The cladding tube 4 is arranged between two arc-shaped clamping plates 7; the fixing of the cladding tube 4 is achieved by means of the arc clamp 7 which can form a cylinder, and the length of the arc clamp 7 is greater than the length of the cladding tube 4, so that the cladding tube 4 can expand axially in the arc clamp 7 after irradiation, but the length is not too great, and in general, the length of the arc clamp 7 is 0.5-1 mm longer than the length of the cladding tube 4.

The inner diameter of the arc clamp 7 is larger than the outer diameter of the cladding tube 4, but it is ensured that the inner side of the arc clamp 7 is in close contact with the cladding tube 4, i.e. that the radial expansion of the cladding tube 4 is not affected too much, while the cladding tube 4 is kept in the arc clamp 7 without excessive movement.

The clamping plate sleeves 5 are fixedly arranged at two ends of the arc clamping plate 7 and apply constraint force to the arc clamping plate 7; the arc-shaped clamping plates 7 are spliced into a cylindrical structure through the clamping plate sleeve 5, and the gap between the inner diameter of the clamping plate sleeve 5 and the outer diameter of the arc-shaped clamping plates 7 is smaller than 0.05mm, in addition, in order to avoid the cladding tube 4 from sliding out of the arc-shaped clamping plates 7 after installation, a circular ring can be arranged at one end of the clamping plate sleeve 5, and the inner diameter of the circular ring is smaller than the outer diameter of the cladding tube 4, so that the stability of the cladding tube 4 can be increased.

Meanwhile, an annular cavity is formed between the outer side face of the arc-shaped clamping plate 7 and the inner side face of the outer sleeve 9, and the thickness of the cavity is preferably 0.2-0.3 mm.

During the test, the cavity is filled with protective gas to form an annular gas protection layer, so that the test is ensured to reach the temperature requirement.

Example IV

This embodiment is an extension of embodiment three in which the number of clamping assemblies is one, i.e. only one cladding tube 4 can be tested at a time, whereas in this embodiment the number of cladding tubes 4 is increased to at least two, whereby each test can be performed in turn.

The number of the clamping block assemblies is not less than 2, the clamping block assemblies are coaxially arranged, the clamping assembly further comprises two-way fixing blocks 6, and two adjacent clamping block assemblies are connected through the two-way fixing blocks 6.

Because a plurality of clamping assemblies are arranged, the clamping assemblies are required to be connected through the bidirectional fixing block 6, the bidirectional fixing block 6 is a straight pipe inserted into the cladding pipe 4, and the purpose of coaxially connecting the two clamping block assemblies can be achieved through the straight pipe.

In order to realize the position fixation of the bidirectional fixing block 6 and the outer sleeve 9, the annular bulge is arranged in the middle of the straight pipe, the outer annular surface of the annular bulge is corrugated and is in line contact with the inner side of the outer sleeve 9, and the purpose of line contact is to ensure that the arc clamping plate 7 and the inner side of the outer sleeve 9 form a cavity for filling protective gas.

Example five

The present embodiment includes the structures of the first, second, and third embodiments.

In order to detect the temperature detection and neutron fluence of the irradiation test, the bearing device further comprises a detection component 3 for detecting the temperature and neutron fluence, and the detection component 3 is fixedly arranged in the outer sleeve;

the detection assembly 3 is at least two, and the both ends of one detection assembly 3 are connected with clamping assembly and bracing piece 10 respectively, and the both ends of another detection assembly 3 are connected with clamping assembly and elastic component 2 respectively.

I.e. the detection assembly 3 is arranged at the upper end and the lower end of the outer sleeve 9, and the temperature and the neutron fluence at the two ends of the outer sleeve 9 are detected.

The detection assembly 3 includes: a detector case 33, a temperature measuring element 32, a neutron detecting sheet, and a detector cover 31 for closing the detector case 33 and detachably connecting thereto; the temperature measuring element 32 is fixedly arranged on the outer side surface of the detector box 33, and the neutron detection sheet is arranged inside the detector box 33;

the fixation of the neutron detection wafer is achieved by providing a detector box 33 and a detector cover 31.

The number of the temperature measuring elements 32 may be plural, and the temperature measuring elements 32 with different melting points and different numbers of the temperature measuring elements 32 may be selected in practice according to the temperature requirement, without being known on the outer side of the probe case 33 along the central axis of the probe case 33.

For example: the temperature measuring element 32 is a metal wire, and the melting points of the temperature measuring wires are different, and a plurality of circular grooves are formed in the outer side of the detector box 33 for installing the temperature measuring wires.

Also for example: the temperature measuring element 32 can also be a temperature sensor, and a plurality of circular grooves are formed on the outer side of the detector box 33 for installing the temperature sensor.

Counter bores are formed in the bottom of the detector box 33 and the top of the detector cover 31, and positioning ribs are machined on the outer side of the bottom of the detector box 33. The detecting component 3 is connected with the clamping component through a unidirectional fixed block 8,

because the detecting component 3 is arranged at the two ends of the clamping component, a fixing scheme is provided, and a unidirectional fixing block 8 is adopted, wherein the unidirectional fixing block 8 is a straight rod, one end of the straight rod is inserted into a counter bore of the detecting component 3, and the other end of the straight rod is inserted into the cladding tube 4;

meanwhile, in order to avoid excessive movement of the straight rod in the counter bore and the cladding tube 4, a circular ring is arranged in the middle of the straight rod, the outer circular surface of the circular ring is in contact with the inner side surface of the outer sleeve 9, and the annular side surfaces of the circular ring are respectively attached to the clamping assembly and the detection assembly 3.

Example six

The structure of the fifth embodiment is optimized for the fifth embodiment, that is, a plurality of clamping assemblies are arranged, when the number of the clamping assemblies is not less than two, the number of the detecting assemblies 3 is three, the three detecting assemblies 3 are respectively arranged at the upper section, the middle section and the lower end of the outer sleeve, and two ends of the detecting assembly 3 positioned at the middle section are respectively connected with two adjacent clamping assemblies.

In this embodiment, as shown in fig. 1, two clamping assemblies are provided, three detecting assemblies 3 are provided, the clamping assemblies and the detecting assemblies 3 are sequentially arranged at intervals, and are arranged at the upper, middle and lower positions of the outer sleeve 9 (9), and at the same position, the neutron fluence is at least one measuring point, and the temperature measuring points are at least three.

In addition, three ribs are machined in the axial direction on the outer side of the outer sleeve 9 for the purpose of increasing strength.

Example seven

Since an inert gas needs to be injected into the outer sleeve 9 for protecting the whole device before the irradiation test is performed, this embodiment provides a gas filling device for a cladding tube irradiation carrier device.

For the use of gas filling devices, it is necessary to provide gas holes and plugs on the carrier device.

And the air hole arranged in the lower end head 11 and used for communicating the inside of the outer sleeve 9 is used for discharging air in the outer sleeve 9 and introducing inert gas.

In general, the air holes are stepped holes which are communicated with the inside and the outside of the outer sleeve 9, and the aperture of the end face of the lower end 11, which is not connected with the outer sleeve 9, is smaller than 1mm.

The stepped hole is mainly used for final shielding gas seal welding of the device, and the shielding gas is filled in the device during the test.

The blocking of the blocking air holes is used for sealing the whole bearing device after the injection of the inert gas is completed.

The gas filling device comprises a barrel 104, a drive rod 101, a drive nut 102 and a gas nozzle 107.

The two ends of the cylinder 104 are fixedly provided with an end cover 103 and a bottom cover 108 respectively, the bearing device is arranged in the cylinder 104, and the upper end head 1 is connected with the bottom cover 108; in order to stably connect the bearing device with the bottom cover 108, a connecting hole is provided on the inner side surface of the bottom cover 108, and the upper end 1 can be installed in the connecting hole to realize fixation.

In practical use, the carrier device may be required to be disposed coaxially with the cylinder 104, so that a plurality of support tables 105 may be disposed inside the cylinder 104 for the purpose of achieving the purpose, the carrier device may be supported by the support tables 105, and a support 106 may be disposed outside the cylinder 104 for fixing the whole gas filling device.

The first end of the driving rod 101 penetrates through the end cover 103 to extend into the cylinder 104, the driving rod 101 is blocked, the driving nut 102 is in threaded connection with the driving rod 101, and the driving rod 101 is driven to move towards the inside of the cylinder 104 to block the air hole;

by turning the drive nut 102, the drive rod 101 may be moved inward, thereby effecting the plugging operation, and reference may be made specifically to the gas filling method described below.

One end of the air port 107 communicates with the interior of the cylinder 104, and the other end of the air port 107 communicates with a vacuum pump/air bottle.

A plurality of gas nozzles 107 may be provided and connected to the vacuum pump and the gas bottle, respectively, to perform a gas filling operation.

It is also possible to provide 1 air port 107 and to connect the vacuum pump to the gas bottle via a three-way valve.

Example eight

The embodiment provides a gas filling method of a gas filling device of a cladding tube irradiation bearing device based on the above, which specifically comprises the following steps:

s1, after the assembly of a bearing device of the irradiation bearing device of the cladding tube is completed, welding an upper end head 1 and a lower end head 11 with an outer sleeve 9, and performing weld qualification inspection;

s2, opening the end cover 103, fixing the upper end head 1 with the bottom cover 108, and placing the whole bearing device on the supporting platform 105.

S3, installing the plug on the driving rod 101, and arranging the plug corresponding to the air hole and reserving a gap;

s4, communicating the interior of the cylinder 104 with a vacuum pump and a gas bottle (helium bottle is adopted in the embodiment) by arranging a plurality of gas nozzles 107 or connecting a three-way valve;

s5, opening a vacuum pump to vacuumize the interior of the cylinder 104, closing the vacuum pump when the pressure is lower than a set value (150 KPa), and filling helium into the interior of the cylinder 104 through a helium bottle;

s6, when the pressure value is higher than a set value (1.5 atm), closing the helium bottle and carrying out vacuum treatment on the cylinder 104 again through the vacuum pump;

s7, repeating the operations of the steps S6 and S7 for 5-6 times, and finally filling the cylinder 104 with helium;

s8, rotating the driving nut 102 to enable the driving rod 101 to move inwards, inserting the plug into the air hole, enabling the distance between the plug and the air hole of the lower end 11 to be larger than 2mm, and enabling the plug to be in interference fit with the air hole of the lower end 11.

S9, opening the end cover 103, taking out the bearing device, quickly welding the plug with the lower end head 11, and checking the welding seam. .

In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "a particular example," "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

It will be appreciated by persons skilled in the art that the above embodiments are provided for clarity of illustration only and are not intended to limit the scope of the application. Other variations or modifications of the above-described application will be apparent to those of skill in the art, and are still within the scope of the application.

Claims

1. A cladding tube irradiation carrier apparatus comprising:

the clamping assembly is fixed in the outer sleeve through the fixing assembly;

the upper end head is set to be the upper end of the bearing device relative to the end where the outer sleeve is located, and the lower end head is set to be the lower end of the bearing device relative to the end where the outer sleeve is located;

the fixing assembly includes: the support rod is arranged between the clamping assembly and the lower end head, and two ends of the support rod respectively abut against the clamping assembly and the lower end head; the elastic component is arranged between the clamping component and the upper end head, and two ends of the elastic component are respectively abutted against the clamping component and the upper end head;

the clamping assembly includes at least one clamping block assembly, the clamping block assembly including: the two arc clamping plates and clamping plate sleeves can be spliced into a cylindrical structure, and the clamping plate sleeves are fixedly arranged at two ends of the arc clamping plates and apply constraint force to the arc clamping plates; the cladding tube is arranged between the two arc-shaped clamping plates; the length of the arc clamping plate is larger than that of the cladding tube, and the inner diameter of the arc clamping plate is larger than the outer diameter of the cladding tube;

if the number of the clamping block assemblies is not less than 2, a plurality of the clamping block assemblies are coaxially arranged, and the clamping assembly further comprises: two-way fixed block, adjacent two the clamp splice subassembly is passed through two-way fixed block connects, two-way fixed block includes: the straight pipe inserted into the cladding pipe and the annular bulge arranged in the middle of the straight pipe, and the outer annular surface of the annular bulge is corrugated and is in facial line contact with the inner side of the outer sleeve.

2. A cladding tube irradiation carrier according to claim 1, further comprising a detection assembly for detecting temperature and neutron quantity, the detection assembly being fixedly arranged inside the outer sleeve;

3. A cladding tube irradiation carrier according to claim 2, wherein when the number of said clamping assemblies is not less than two, the number of said detecting assemblies is three, three of said detecting assemblies are respectively provided at the upper, middle and lower ends of said outer jacket tube, and two ends of said detecting assembly at the middle are respectively connected with two adjacent clamping assemblies.

4. A cladding tube irradiation carrier apparatus according to claim 2 or 3, wherein said detection assembly comprises: