CN115816012A

CN115816012A - Filling device and filling method for filling a mandrel into a radioactive tube

Info

Publication number: CN115816012A
Application number: CN202310114433.9A
Authority: CN
Inventors: 白冰; 鱼滨涛; 梁瑞鹏; 张�林; 赵迎超; 张长义
Original assignee: China Institute of Atomic of Energy
Current assignee: China Institute of Atomic of Energy
Priority date: 2023-01-29
Filing date: 2023-01-29
Publication date: 2023-03-21
Anticipated expiration: 2043-01-29
Also published as: CN115816012B

Abstract

The embodiment of the application relates to combined machining of metals, in particular to a filling device and a filling method for filling a mandrel into a radioactive pipe fitting. The filling device comprises: the funnel comprises a bracket, at least one funnel and at least one elastic piece. The bracket is provided with at least one first through hole. Each funnel includes conical surface section and the export section that meets with the lower extreme of conical surface section, and wherein, conical surface section is used for receiving the dabber of waiting to pack, and the internal diameter of export section is greater than the diameter of dabber and is less than the length of dabber to do benefit to the dabber that gets into conical surface section and can get into the radioactive pipe spare that is located export section below along export section upright, export the section and install in first through-hole, and configure to can operably follow first through-hole lapse when the dabber in the conical surface section is detained. Each elastic member is used for providing upward restoring force for the funnel when one outlet section slides downwards along the first through hole so that the mandrel detained in the conical section can be bounced to slide into the outlet section.

Description

Filling device and filling method for filling a mandrel into a radioactive tube

Technical Field

The embodiment of the application relates to combined machining of metals, in particular to a filling device and a filling method for filling a mandrel into a radioactive pipe fitting.

Background

Internal pressure tests of radioactive tubes such as cladding tubes are generally performed in hot rooms. When the radioactive tube is subjected to the internal pressure test, a mandrel is sometimes inserted into the radioactive tube. In the related art, the filling of the mandrels is generally performed by an operator operating a robot outside the hot chamber. In the operation process, due to the fact that the operation of the manipulator is difficult to align due to the fact that the operation of the manipulator is difficult, the cladding tube and the core shaft are small in size, and in addition, the problems of visual angle and the like caused by lead glass of a hot chamber are solved, smooth filling cannot be achieved frequently, and time and labor are wasted in the filling process. In addition, the mouth of the tube of the cladding tube is easily broken when the manipulator loads the mandrel, and air leakage is easy to occur when the cladding tube sample is sealed and assembled at a later stage, so that an internal pressure test is difficult to perform.

Disclosure of Invention

In order to solve the technical problem, the embodiment of the present application provides a loading device and a loading method for loading a mandrel into a radioactive tube.

In a first aspect, embodiments of the present application provide a loading device for loading a mandrel into a radioactive tube, including:

the support is provided with at least one first through hole;

at least one funnel, each funnel comprises a conical surface section and an outlet section connected with the lower end of the conical surface section, wherein the conical surface section is used for receiving a mandrel to be filled, the inner diameter of the outlet section is larger than the diameter of the mandrel and smaller than the length of the mandrel, so that the mandrel entering the conical surface section can vertically enter the radioactive pipe fitting below the outlet section along the outlet section, and the outlet section is installed in the first through hole and configured to be capable of operatively sliding downwards along the first through hole when the mandrel in the conical surface section is detained; and

at least one elastic member, each elastic member is used for providing upward restoring force to the funnel when one outlet section slides downwards along the first through hole, so that the mandrel detained in the conical surface section can be bounced to slide into the outlet section.

In a second aspect, embodiments of the present application provide a loading method for loading a mandrel into a radioactive tube, the loading method being implemented by using the loading apparatus of the first aspect of the present application, the loading method including:

aligning the open end of the radioactive tube with the outlet section of the funnel below the funnel using a first manipulator or clamp;

grabbing the mandrel by using a second manipulator, and placing the mandrel on the conical surface section of the funnel;

if the mandrel does not enter the outlet section, the funnel is pressed downwards by using the second manipulator, and then the second manipulator is separated from the funnel, so that the mandrel is bounced upwards under the restoring force of the elastic part;

if the mandrel enters the outlet section, the filling operation of the mandrel is finished;

if the mandrel does not enter the outlet section, the funnel is pressed downwards again by the second manipulator, so that the mandrel bounces upwards again under the restoring force of the elastic part until the mandrel enters the outlet section.

In the embodiment of the invention, the manipulator only needs to place the mandrel in the conical surface section of the funnel, and does not need to directly place the mandrel in the radioactive pipe fitting with smaller inner diameter, so that the mandrel can enter the radioactive pipe fitting. Even though the dabber leads to the dabber to slide smoothly in horizontal in the conical surface section occasionally and gets into the export section, only need the manipulator to push down the funnel and can make the dabber bounce and change the gesture, because the dabber tip has the chamfer, and under the guide effect of conical surface section, the dabber probably can slide down and get into in the export section. Therefore, the filling device and the filling method greatly reduce the operation difficulty of the manipulator, and are particularly suitable for filling the core shaft of the pipe fittings such as the cladding pipe in a hot chamber.

Drawings

Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.

FIG. 1 is a schematic block diagram of a filling apparatus according to one embodiment of the present invention;

FIG. 2 is a schematic side view of the loading device of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the loading device of FIG. 1;

FIG. 4 is a schematic cross-sectional view from another angle of the loading device of FIG. 1;

FIG. 5 is a partial enlarged view of area A shown in FIG. 4;

FIG. 6 is an enlarged view of the funnel of FIG. 5, schematically illustrating the mandrel; and

fig. 7 is a schematic side view of a loading device according to another embodiment of the invention.

It is noted that the drawings are not necessarily to scale and are merely illustrative in nature and not intended to obscure the reader.

Description of reference numerals:

10. a support; 11. a base; 111. a positioning part; 112. a clamping portion; 113. a vertical plate; 114. a transverse plate; 12. rotating the disc; 121. a central portion; 122. an extension portion; 1221. a first through hole; 1222. a second through hole; 123. a positioning and matching part; 124. an installation part; 125. a copper sleeve; 126. a rotating shaft; 127. a bearing seat; 128. a bearing;

20. a funnel; 21. a conical surface section; 22. an outlet section; 221. an outer ring groove; 222. an extension section; 223. an inner ring groove; 23. a curved surface section;

30. an elastic member;

200. a radioactive tube;

300. and (3) a mandrel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention. It should be apparent that the described embodiment is one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

It is to be noted that technical terms or scientific terms used herein should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs, unless otherwise defined.

The meaning of "a plurality" in the description of embodiments of the invention is at least two, e.g., two, three, etc., unless explicitly specified otherwise.

When the internal pressure test is performed on the cladding tube sample, a mandrel can be filled in the cladding tube in order to reduce the volume of the pressure medium required to be filled in the cladding tube sample. Especially when the pressure medium is gas, the gas is compressed more, so the gas consumption is more during filling. After the mandrel occupies a part of the volume in the cladding tube, the using amount of filling gas can be reduced, so that the test is easier to develop and control, and a large amount of pressure media (gas and liquid) can be prevented from being released into the high-temperature furnace after the cladding tube sample is broken, so that the damage of thermal shock to the high-temperature furnace is reduced.

The mandrel is generally cylindrical. The end part of the mandrel is provided with a chamfer, and the circumferential surface of the mandrel is provided with a plurality of grooves parallel to the axis, so that pressure media can conveniently circulate. The inner diameter of the cladding tube is typically small, for example less than 10mm, or around 10 mm. The diameter of the mandrel is slightly smaller than the inner diameter of the cladding tube.

In the present embodiment, multiple mandrels may be loaded axially into each containment tube. For example, for a 120mm cladding tube, the interior is filled with approximately 11 mandrels of about 10mm in length. For mandrels of such small size, it is very difficult to directly fill the mandrel into the cladding tube using a robot.

In order to solve the above problem, embodiments of the present application provide a filling device for filling a mandrel into a radioactive tube, which facilitates filling the mandrel with a small size into the radioactive tube.

Referring to fig. 1 to 5, the filling device includes: a support 10, at least one funnel 20 and at least one resilient member 30.

The bracket 10 is provided with at least one first through hole 1221. The number of the first through holes 1221 and the funnels 20 is the same. Each of the funnels 20 is installed at one of the first through-holes 1221.

In some embodiments, the filling device may include only one funnel 20. In other embodiments, the filling device may include multiple funnels 20 for filling mandrels 300 of different diameters, respectively. For example, the filling device may include 2, 3, 4, 5, and more hoppers 20.

Each funnel 20 comprises a conical section 21 and an outlet section 22 connected to the lower end of the conical section 21. Wherein the outlet section 22 is mounted within the first through hole 1221. The conical section 21 serves to receive a mandrel 300 to be filled. The outlet section 22 may be a cylindrical section of uniform internal diameter. The inside diameter of the outlet section 22 is larger than the diameter of the mandrel 300 and smaller than the length of the mandrel 300 to facilitate the mandrel 300 entering the conical section 21 to enter the radioactive tube 200 located below the outlet section 22 vertically along the outlet section 22. It will be readily appreciated that the upper end opening of the tapered section 21 is larger than the lower end opening. The manipulator only needs to put the mandrel 300 into the funnel 20, and compared with the manipulator which directly loads the mandrel 300 into the radioactive pipe fitting 200, the manipulator of the embodiment of the application has greatly reduced operation difficulty.

In the present embodiment, only one mandrel 300 is loaded at a time. After the mandrel 300 in the funnel 20 enters the radioactive tube 200, the robot places another mandrel 300 into the funnel 20 to continue filling.

In some embodiments, the upper end opening of tapered section 21 may be greater than the length of mandrel 300 to facilitate the insertion of mandrel 300 therein by a robotic arm. It will be readily appreciated that when the manipulator places the mandrel 300 into the tapered section 21, the mandrel 300 may lie laterally within the tapered section 21 and may not slide down smoothly into the outlet section 22 (i.e., the mandrel 300 may be trapped within the tapered section 21).

In the embodiment of the present application, in order to enable the retained mandrel 300 to slide down into the outlet section 22 smoothly, in particular, the outlet section 22 is installed in the first through hole 1221 and configured to be able to slide down along the first through hole 1221 when the retained mandrel 300 in the conical surface section 21 is retained.

Each of the elastic members 30 is adapted to provide an upward restoring force to the funnel 20 when one of the outlet sections 22 slides down along the first through-hole 1221 so that the mandrel 300 retained in the tapered section 21 can be slid into the outlet section 22 after being sprung up to the replacement position. The elastic member 30 may be a spring, for example. In other embodiments, the elastic member 30 may be other common structures capable of providing a reverse restoring force.

Specifically, when the mandrel 300 is retained in the tapered surface section 21, the manipulator can press down the funnel 20 to slide the outlet section 22 downwards relative to the first through hole 1221, and then the manipulator moves away quickly, so that the funnel 20 rebounds instantaneously under the action of the elastic member 30, and at this time, the mandrel 300 in the funnel 20 is also bounced together, and the bounced mandrel 300 can slide down to the outlet section 22 smoothly along the tapered surface section 21 after changing the posture.

It can be seen that the manipulator in the embodiment of the present invention only needs to place the mandrel 300 in the tapered section 21 of the funnel 20, and does not need to place the mandrel 300 directly into the radioactive tube 200 with a smaller inner diameter, so that the mandrel 300 can enter the radioactive tube 200 through the funnel 20. Even if the mandrel 300 is placed transversely in the conical surface section 21 occasionally, the mandrel 300 cannot slide down smoothly to enter the outlet section 22, the manipulator only needs to press the funnel 20 downwards to enable the mandrel 300 to bounce and change the posture, and the end of the mandrel 300 is provided with a chamfer, and the mandrel 300 can slide down into the outlet section 22 probably under the guiding action of the conical surface section 21.

Referring to fig. 6, in some embodiments, each funnel 20 further comprises: and the curved surface section 23 is connected with the upper end of the conical surface section 21, and the curved surface section 23 is inwards convex along the radial direction. It will be readily understood that "the curved surface section 23 is inwardly convex in the radial direction" means that when the upper and lower ends of the curved surface section 23 are connected by a tapered surface, the midpoint of the curved surface section 23 is located on the inner side of the tapered surface (i.e., the side closer to the axis). In the embodiment of the present application, the funnel 20 is configured to include the curved surface section 23 and the conical surface section 21 which are sequentially connected from top to bottom, and compared with the configuration that the upper portion of the outlet section 22 of the funnel 20 is entirely configured as the conical surface section 21, the curved surface section 23 is more favorable for maintaining the posture of the mandrel 300 sliding down along the conical surface section 21 in an inclined manner, so that the probability of the mandrel 300 crossing the conical surface section 21 is reduced. In other words, the combination of the curved section 23 and the tapered section 21 is more beneficial to make the mandrel 300 slide down to the outlet section 22 smoothly, and the probability that the mandrel 300 is placed on the tapered section 21 transversely is reduced.

It will be readily appreciated that the radially inner surface of the funnel 20 in the embodiment of the present application is smooth, and the curved surface section 23, the conical surface section 21 and the outlet section 22 are all connected in smooth transition.

In some embodiments, referring to fig. 5, the first through-hole 1221 has a copper sleeve 125 mounted therein, and the outlet section 22 of the funnel 20 is slidably disposed within the copper sleeve 125.

Specifically, the lower portion of the first through hole 1221 is formed with a stepped surface above which the copper bush 125 is mounted. The spring (i.e., resilient member 30) fits over the outlet section 22 of the funnel 20. The bottom of the outlet section 22 of the funnel 20 protrudes downwardly beyond the first through-hole 1221. Radially outwardly of the bottom of the outlet section 22 is an outer annular groove 221 for receiving a collar (not shown). The collar serves to prevent the funnel 20 from being removed upwardly from the first through-hole 1221 when the funnel 20 is moved upwardly by the spring.

In some embodiments, the bottom of the outlet section 22 is formed with an enlarged diameter expanded section 222. The outer ring groove 221 is formed radially outward of the expansion section 222. The expanding section 222 is used to receive the upper port of the radioactive tube 200, thereby facilitating the smooth sliding of the mandrel 300 into the radioactive tube 200. The radially inner side of the expanding section 222 is formed with an inner ring groove 223 for placing a rubber ring (not shown in the drawings) for clamping the upper end of the radioactive tube member 200 by the rubber ring.

In some embodiments, when the number of the funnels 20 is plural, the inner diameters of the outlet sections 22 of the respective funnels 20 are different to be respectively used for filling the mandrels 300 of different diameters. Since multiple hoppers 20 can accommodate different diameter mandrel 300 loading, loading efficiency is improved.

In some embodiments, the position of each funnel 20 may remain fixed for the case of multiple funnels 20. When filling is performed, the robot operates at the corresponding hopper 20.

In other embodiments, the position of each hopper 20 can be changed to facilitate operator inspection of the hot cell, so that the robot is always operated in a position that facilitates operator inspection of the hot cell.

In some embodiments, the stand 10 may include a base 11 and a rotating disk 12 rotatably disposed on the base 11. The first through-hole 1221 is formed on the rotary disc 12, i.e., the funnel 20 is mounted on the rotary disc 12. Since the rotatable disk 12 is rotatable relative to the base 11, the robot can rotate the funnel 20 to be used to an operating position for viewing by an operator outside the hot chamber during filling.

Referring to fig. 1, the rotary disk 12 may include a central portion 121 and a plurality of extension portions 122 extending outward from the central portion 121. Wherein the central portion 121 is rotatably disposed on the base 11, and each of the extending portions 122 is formed with a first through hole 1221. Each funnel 20 is disposed on an extension 122 to facilitate placement of the radioactive tubing 200 under the extension 122.

The base 11 may include a vertically extending riser 113 and a cross plate 114 extending horizontally from a top end of the riser 113.

A rotating shaft 126 may extend downward from the bottom of the central portion 121, and the horizontal plate 114 of the base 11 is provided with a rotating shaft hole, a bearing 128 disposed in the rotating shaft hole, and a bearing seat 127 coaxial with the bearing 128. The rotating shaft 126 is rotatably disposed in the bearing housing 127 by a bearing 128.

In some embodiments, a detent arrangement may be provided to ensure that the rotating disc 12 remains non-rotating during a filling operation when the desired funnel 20 has been rotated to the operating position. The locating structure may be a structure commonly used in the art for preventing relative rotation of two components, such as a structure that the rotating disc 12 is held against rotation relative to the base 11 by a pin and hole fit.

In some embodiments, the base 11 is provided with a positioning portion 111. Each extension 122 is further formed with a second through hole 1222, and each extension 122 is provided with a positioning matching portion 123 extending from the second through hole 1222 to the lower side of the extension 122. When the rotating disc 12 is rotated such that the positioning engagement portion 123 of one of the extending portions 122 faces the positioning portion 111, the positioning engagement portion 123 operatively engages with the positioning portion 111 to position the extending portion 122.

In some embodiments, the positioning portion 111 is a snap projection; the locating mating portion 123 is correspondingly a card slot. In other embodiments, the positioning portion 111 is a card slot; the detent engagement 123 is correspondingly a snap-fit projection.

The extension portion 122 is further provided with a mounting portion 124 and a second elastic member, the mounting portion 124 is fixed to the rotating disc 12, and the positioning portion 111 is rotatably mounted to the mounting portion 124. The second elastic member is used to provide a supporting force for the positioning portion 111.

The second elastic member may be a spring, for example. When the positioning matching part 123 is a snap-fit protrusion, the mounting part 124 and the second elastic member may be similar to a clip structure. When the manipulator rotates the rotary disc 12 to position any funnel 20 at the operating position, the corresponding positioning matching part 123 of the funnel 20 can be in positioning matching with the positioning part 111. At this time, the manipulator pulls the engaging protrusion into the engaging groove to lock the rotating disc 12. When the rotating disc 12 needs to be rotated, the clamping protrusions are reversely stirred by the manipulator to be separated from the clamping grooves, and then the rotating disc 12 is unlocked.

The positioning portion 111 may be provided at the top end of the riser 113 of the base 11. To facilitate positioning, the riser 113 is disposed facing the viewing window of the thermal chamber, and the width of the riser 113 may be the same as the width of the extension 122. When the extension 122 is rotated to be substantially aligned with the riser 113, the rotary disk 12 is rotated to a position where the positioning portion 111 and the positioning engagement portion 123 can be engaged. With this arrangement, it is convenient for an operator outside the hot chamber to observe whether the rotary disk 12 rotates to a position where the positioning portion 111 and the positioning engagement portion 123 can be engaged with each other.

Referring to fig. 7, in some embodiments, the priming device further comprises: a clamping portion 112 for clamping the radioactive tube 200 to align the open end of the radioactive tube 200 with the outlet section 22 of the funnel 20 below the rotating disk 12.

The clamping portion 112 may be mounted to the base 11.

The clamping portion 112 may be disposed below the positioning portion 111. When the positioning engagement portion 123 and the positioning portion 111 are engaged to position the extension portion 122, the radioactive tube 200 gripped by the grip portion 112 is coaxial with the corresponding funnel 20. In other words, when the robotic arm rotates the turn disc 12 to position either funnel 20 in an operational position, the open end of the radioactive tube 200 is aligned with the outlet section 22 of that funnel 20 below the turn disc 12.

The clamping portion 112 may be configured to be able to move up and down relative to the base 11, thereby being able to move the open end of the radioactive tubing 200 up into the exit section 22 of the funnel 20 or down out of the exit section 22.

In other embodiments, the clamp 112 may not be provided and the radioactive tubing 200 may be held by another robot or other mating structure.

In the illustrated embodiment, the rotary disk 12 has four extensions 122, and the rotary disk 12 is cross-shaped as a whole. The number of funnels 20 is four in total, one funnel 20 being provided on each extension 122. The outlet sections 22 of the four funnels have different inside diameters to accommodate the filling requirements of four different diameter mandrels 300. Different symbols may be marked on the corresponding locating engagement 123 or on the extension 122 of each funnel 20 for distinguishing between funnels 20 of different mandrel sizes. For example, 1, 2, 3, 4 may be marked on the respective locating engagement portions 123 of the four extensions 122 to distinguish funnels 20 of different mandrel sizes.

As can be seen from the above, the loading device for loading the mandrel 300 into the radioactive tube 200 according to the present invention can load mandrels into radioactive tubular samples with different diameters. The curved surface in the funnel 20 can smoothly guide the dabber 300 to the interior of the radioactive tubular sample, has improved the dabber efficiency of filling. The complex operation of filling the mandrels with different sizes is simplified, and the workload of manual operation is reduced. When the mandrel 300 cannot fall down in the funnel 20, the mandrel 300 can be reset through the spring below the funnel 20, and the problem that the mandrel 300 is blocked and detained is solved.

The embodiment of the present application further provides a loading method for loading the mandrel 300 into the radioactive tube 200, which is implemented by using the loading device according to any embodiment of the present application.

The filling method includes the following steps S1 to S5.

S1, the open end of the radioactive tube 200 is aligned with the outlet section 22 of the funnel 20 below the funnel 20 using a first manipulator or gripper 112.

And S2, grabbing the mandrel 300 by using a second mechanical arm, and placing the mandrel 300 into the conical section 21 of the funnel 20.

And S3, if the mandrel 300 does not enter the outlet section 22, pressing the funnel 20 downwards by using the second manipulator, and then separating the second manipulator from the funnel 20, so that the mandrel 300 is bounced upwards under the restoring force of the elastic member 30.

S4, if the mandrel 300 enters the outlet section 22, the filling operation of the mandrel 300 is completed.

And S5, if the mandrel 300 does not enter the outlet section 22, pressing the funnel 20 downwards again by using the second manipulator, so that the mandrel 300 bounces upwards again under the restoring force of the elastic member 30 until the mandrel 300 enters the outlet section 22.

It is understood that after the filling operation of one mandrel 300 is completed, the step S2 is repeated until the sum of the lengths of the mandrels 300 filled in the radioactive tube 200 is close to or equal to the length of the radioactive tube 200.

The filling device and the filling method greatly reduce the operation difficulty of the manipulator, and are particularly suitable for filling the mandrel 300 for the pipe fittings such as cladding pipes in a hot room.

It should also be noted that, in the case of the embodiments of the present invention, features of the embodiments and examples may be combined with each other to obtain a new embodiment without conflict.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention is subject to the scope of the claims.

Claims

1. A loading device for loading a mandrel into a radioactive tube, comprising:

the support (10), the support (10) is provided with at least one first through hole (1221);

at least one funnel (20), each funnel (20) comprising a conical section (21) and an outlet section (22) contiguous with a lower end of the conical section (21), wherein the conical section (21) is configured to receive a mandrel (300) to be filled, the outlet section (22) has an inner diameter greater than the diameter of the mandrel (300) and less than the length of the mandrel (300) to facilitate the mandrel (300) entering the conical section (21) to be able to enter a radioactive tube (200) located below the outlet section (22) vertically along the outlet section (22), the outlet section (22) is mounted within the first through hole (1221) and configured to be operable to slide down the first through hole (1221) when the mandrel (300) within the conical section (21) is stagnant; and

at least one elastic member (30), each elastic member (30) is used for providing upward restoring force to the funnel (20) when one outlet section (22) slides downwards along the first through hole (1221) so that the mandrel (300) detained in the conical surface section (21) can be bounced to slide into the outlet section (22).

2. The filling device according to claim 1, wherein each of the hoppers (20) further comprises: the curved surface section (23) is connected with the upper end of the conical surface section (21), and the curved surface section (23) is inwards convex along the radial direction.

3. The filling device according to claim 1, wherein the number of the first through holes (1221) and the number of the funnels (20) are each plural, and the inner diameters of the outlet sections (22) of the funnels (20) are different from each other for filling mandrels (300) of different diameters, respectively.

4. The filling device as claimed in claim 3, characterized in that the holder (10) comprises a base (11) and a rotary disk (12) which is rotatably arranged on the base (11), the first through-opening (1221) being formed in the rotary disk (12).

5. The filling device according to claim 4, wherein the rotary disk (12) comprises a central portion (121) and a plurality of extensions (122) extending outwardly from the central portion (121),

wherein the center portion (121) is rotatably provided on the base (11), and each of the extending portions (122) is formed with one of the first through holes (1221).

6. Filling device according to claim 5, characterized in that the base (11) is provided with a positioning portion (111),

each of the extending portions (122) is further formed with a second through hole (1222), each of the extending portions (122) is provided with a positioning engagement portion (123) extending from the second through hole (1222) to a position below the extending portion (122), and when the rotating disk (12) rotates to make the positioning engagement portion (123) of one of the extending portions (122) face the positioning portion (111), the positioning engagement portion (123) is operable to engage with the positioning portion (111) to position the extending portion (122).

7. The filling device according to claim 6, wherein the positioning portion (111) is a snap-fit projection or a snap-fit groove; the positioning matching part (123) is correspondingly a clamping groove or a clamping protrusion.

8. The filling device according to claim 6, wherein the extension portion (122) is further provided with a mounting portion (124) and a second elastic member, the positioning portion (111) is rotatably mounted to the mounting portion (124), and the second elastic member is used for providing an abutting force for the positioning portion (111).

9. The filling device of claim 6, further comprising:

a clamping portion (112) for clamping the radioactive tubing (200) to align an open end of the radioactive tubing (200) with the outlet section (22) of the funnel (20) below the rotating disc (12).

10. The filling device according to claim 9, wherein the clamping portion (112) is provided below the positioning portion (111),

wherein the radioactive tube (200) clamped by the clamping portion (112) is coaxial with the corresponding funnel (20) when the positioning engagement portion (123) and the positioning portion (111) are engaged to position the extension portion (122).

11. A loading method for loading a mandrel into a radioactive tube, the loading method being carried out using the loading device of any one of claims 1 to 10, wherein the loading method comprises:

aligning the open end of the radioactive tube (200) with the outlet section (22) of the funnel (20) below the funnel (20) with a first manipulator or grip (112);

grabbing the mandrel (300) by using a second manipulator, and placing the mandrel (300) on the conical section (21) of the funnel (20);

if the mandrel (300) does not enter the outlet section (22), pressing the hopper (20) downwards by using the second manipulator, and then separating the second manipulator from the hopper (20) so that the mandrel (300) is bounced upwards under the restoring force of the elastic piece (30);

completing a priming operation of the spindle (300) if the spindle (300) enters the outlet section (22);

if the mandrel (300) does not enter the outlet section (22), pressing the funnel (20) downwards again by using the second manipulator, so that the mandrel (300) bounces upwards again under the restoring force of the elastic piece (30) until the mandrel (300) enters the outlet section (22).