CN115824826B

CN115824826B - Internal pressure test system and internal pressure test method for radioactive tubular sample

Info

Publication number: CN115824826B
Application number: CN202310103558.1A
Authority: CN
Inventors: 宁广胜; 鱼滨涛; 梁瑞鹏; 白冰; 张长义; 贺新福; 杨文�
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: 2023-05-23
Anticipated expiration: 2043-01-29
Also published as: CN115824826A

Abstract

The present application relates to analysis of mechanical properties of radioactive tubular samples by means of physical properties of tubular metals, in particular to an internal pressure test system and an internal pressure test method for radioactive tubular samples. The internal pressure test system includes: a joint assembling device, at least one internal pressure furnace and a sample loading and unloading device. The joint assembling device is used for installing a sealing joint and a pressurizing joint at two ports of the radioactive tubular sample respectively so as to assemble the radioactive tubular sample into a test sample. The internal pressure furnace comprises a furnace chamber and a pressure joint positioned in the furnace chamber. The pressure connector is used for being in sealing connection with the pressurizing connector of the test sample so as to provide pressure medium for the interior of the test sample. The sample loading and unloading device can move between any internal pressure furnace and the joint assembling device and is used for sealing and connecting or separating the pressurizing joint of the test sample with the pressure joint of one internal pressure furnace. The internal pressure test system can shorten the assembly time for carrying out internal pressure test on the radioactive tubular sample.

Description

Internal pressure test system and internal pressure test method for radioactive tubular sample

Technical Field

The present invention relates to analysis of mechanical properties of a radioactive tubular sample by means of physical properties of the tubular metal, and in particular to an internal pressure test system and an internal pressure test method for a radioactive tubular sample.

Background

Due to the special nature of the application sites of the reactor fuel cladding, internal pressure tests are required to measure the mechanical properties of the reactor fuel cladding both before practical application and after irradiation. When an internal pressure test is performed on a cladding tube sample, it is necessary to separately attach a closing joint and a pressurizing joint for introducing a pressure medium into the inside of the cladding tube sample to both ports of the cladding tube sample.

In the related art, since the cladding tube sample itself has radioactivity, the cladding tube sample and the joint can only be placed inside the hot chamber, and the assembly is performed by an operator operating the robot outside the hot chamber. After the tubular sample is assembled into the test sample, an operator outside the hot chamber is required to operate the manipulator to assemble the pressurizing connector of the test sample with the pressure connector of the internal pressure furnace. Due to the inconvenience of the manipulator, the efficiency and quality of the assembly between the cladding tube sample and the joint and between the test sample and the internal pressure furnace are lower.

Disclosure of Invention

In view of the above problems, the present application has been made in order to provide an internal pressure test system for a radioactive tubular sample and an internal pressure test method that overcome or at least partially solve the above problems.

In a first aspect, embodiments of the present application provide an internal pressure test system for a radioactive tubular sample, comprising:

the joint assembling device is used for respectively installing two joints at two ports of the radioactive tubular sample so as to assemble the radioactive tubular sample into a test sample, wherein the two joints comprise a closed joint and a pressurizing joint;

at least one internal pressure furnace, each internal pressure furnace comprising a furnace chamber and a pressure joint positioned in the furnace chamber, wherein the pressure joint is used for being in sealing connection with the pressurizing joint of the test sample so as to provide pressure medium for the interior of the test sample; and

the sample loading and unloading device can move between any internal pressure furnace and the joint assembling device so as to transfer the test sample to any internal pressure furnace, and the test sample pressurizing joint can be connected with or disconnected from the pressure joint of the internal pressure furnace in a sealing way.

In a second aspect, embodiments of the present application provide a method of testing internal pressure of a radioactive tubular sample, comprising:

Respectively installing two connectors at two ports of the radioactive tubular sample by utilizing a connector assembling device so as to assemble the radioactive tubular sample into a test sample, wherein the two connectors comprise a sealing connector and a pressurizing connector;

moving the test sample to a preset internal pressure furnace by using a sample loading and unloading device, and sealing and connecting a pressurizing connector of the test sample with a pressure connector of the internal pressure furnace;

the test sample was subjected to an internal pressure test in an internal pressure furnace.

According to the internal pressure test system and the internal pressure test method, the assembly time for carrying out the internal pressure test on the radioactive tubular sample can be shortened, and the assembly quality is improved.

Drawings

Other objects and advantages of the present invention will become apparent from the following description of the invention with reference to the accompanying drawings, which provide a thorough understanding of the present invention.

FIG. 1 is a schematic diagram of the structure of a test sample according to one embodiment of the invention;

FIG. 2 is a schematic diagram of the internal pressure test system for radioactive tubular samples according to one embodiment of the present invention;

FIG. 3 is a top view of the internal pressure test system shown in FIG. 2;

FIG. 4 is an enlarged view of the joint assembly device of FIG. 3;

FIG. 5 is a schematic view of the joint assembly device of FIG. 4;

FIG. 6 is a schematic view of the sample transfer mechanism of FIG. 5;

FIG. 7 is a schematic view of the joint tightening mechanism of FIG. 5;

FIG. 8 is a schematic view of the mandrel filling mechanism of FIG. 5;

FIG. 9 is a schematic view of a sample handling apparatus according to one embodiment of the present invention;

FIG. 10 is an enlarged view of a portion of the sample handling apparatus of FIG. 9;

FIG. 11 is a schematic view of the structure of an internal pressure creep furnace according to an embodiment of the present invention;

FIG. 12 is a partial cross-sectional view of the internal pressure creep furnace shown in FIG. 11;

FIG. 13 is a schematic view of the internal pressure creep furnace shown in FIG. 11 with the furnace cover omitted;

FIG. 14 is a cross-sectional view of the internal pressure creep furnace shown in FIG. 13; and

fig. 15 is a flow chart of a method of internal pressure testing according to one embodiment of the present invention.

It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

Reference numerals illustrate:

110. a panel; 111. a slide rail;

100. an internal pressure creep furnace; 10. an upper furnace body; 101. a cavity;

11. a fixed table;

12. a rotary table;

13. a base; 131. a rotating shaft; 132. a bottom heat-insulating ring; 133. a bushing;

141. a pressure joint; 142. a pressure supply pipeline; 143. a vacuumizing pipeline; 1430. a through hole; 1431. an upper vacuumizing pipeline; 1432. a lower vacuumizing pipeline; 144. a vacuum chamber; 1441. a vacuum pumping port;

15. A housing; 152. a sidewall;

160. a heat preservation layer;

170. a heating section;

18. a measurement window; 181. a measuring sensor; 182. a sensor lifting mechanism;

1921. a support rod; 1922. a slide block;

1931. a screw shaft; 1933. a vertical driving part;

1951. sealing sleeve; 1952. a seal ring;

20. a sample loading/unloading device; 21. a motor;

210. a base station; 220. a holding section;

230. a clamping part;

241. a support; 2411. a motor; 242. a horizontal bracket; 2421. a motor;

251. a motor;

271. an origin switch;

30. a joint assembling device;

31. a sample holding mechanism;

32. a joint pre-assembly mechanism; 321. a gripping part; 322. a vertical driving part; 323. a lateral driving section; 324. a bracket; 325. a slide bar;

33. a joint tightening mechanism; 331. a clamping part; 332. a tightening part; 333. a vertical driving part; 334. a clamping part; 335. a vertical slideway; 336. a rotation driving part; 337. a sliding part; 338. a base;

34. a sample transfer mechanism; 341. a clamping part; 342. a rotating part; 343. a turnover part; 344. a lifting cylinder; 345. a clamping jaw cylinder; 346. a turnover cylinder; 347. a revolving cylinder; 348. a support panel; 349. a bracket;

35. A mandrel loading mechanism; 3511. a base; 3512. a rotating disc; 352. a funnel; 3521. a conical surface section; 3522. an outlet section; 353. an elastic member;

36. a joint holding mechanism; 361. a receiving groove;

400. internal pressure blasting furnace;

700. a radioactive tubular sample; 71. a test sample;

800. closing the joint; 800', a pressurizing connector; 810. a fixing member; 820. a rotating member; 840. a threaded interface; 841. an air inlet;

900. and (5) 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 clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are one embodiment, but not all embodiments, of the present invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.

It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present invention belongs.

In the description of the embodiments of the present invention, the meaning of "plurality" is at least two, for example, two, three, etc., unless explicitly defined otherwise.

Referring to fig. 1, the radioactive tubular sample 700 is a hollow tube. In some embodiments, the radioactive tubular sample 700 may be, for example, a cladding tube for a nuclear reactor. The cladding tube may be a cladding tube which has been subjected to nuclear radiation and the internal nuclear fuel removed, it being readily understood that for such cladding tubes it is radioactive.

The radioactive tubular sample 700 has two opposite open ports, and when performing an internal pressure test or a burst test, it is necessary to install the sealing joint 800 and the pressurizing joint 800' at the two open ports of the radioactive tubular sample 700, respectively. Referring to fig. 1, a radioactive tubular sample 700 is assembled with a closing joint 800 and a pressurizing joint 800' to form a test sample 71.

The closure tab 800 may be a plug. The closure tab 800 includes a fixed member 810 and a rotatable member 820 threadably coupled to the fixed member 810. The rotating member 820 can rotate relative to the fixing member 810, and when the radioactive tubular sample 700 is mounted, the fixing member 810 is sleeved on the open port on one side of the radioactive tubular sample 700, and the sealing joint 800 and the radioactive tubular sample 700 can be screwed up by rotating the rotating member 820. The sealing joint 800 is a structure that is more common in the internal pressure test, and will not be described here.

The pressurizing connector 800' also includes a fixing member 810 and a rotating member 820 screw-coupled with the fixing member 810. Unlike the closed joint 800, the pressurizing joint 800' has an air passage inside communicating with the inside of the radioactive tubular sample 700, and when the pressurizing joint 800' is connected to a pressure medium source, the inside of the radioactive tubular sample 700 is filled with a pressure medium through the air passage inside the pressurizing joint 800 '.

Specifically, the pressurized adapter 800' further includes a threaded interface 840 that is coupled to the rotary member 820. The screw joint 840 is used for sealing connection with a pressure joint of the internal pressure furnace. The end face of the threaded interface 840 is provided with a frustoconical surface tapering outwardly in diameter, the circumferential surface of the frustoconical surface being a conical surface. The middle of the circular table is provided with an air inlet 841 communicated with the inside of the radioactive tubular sample 700.

The thread end of the pressure joint of the internal pressure furnace is provided with a conical groove matched with the round table, and the sealing connection between the test sample 71 and the pressure joint of the internal pressure furnace is further ensured through the matching of the conical groove and the round table.

After the radioactive tubular sample 700 is hermetically connected to the pressure joint of the internal pressure furnace through the pressurizing joint 800', a pressure medium from the pressure joint is supplied to the inside of the radioactive tubular sample 700 through the air inlet 841.

In the embodiment shown in fig. 1, both the stationary member 810 and the rotary member 820 have a hexagonal structure.

Referring to fig. 2 and 3, an internal pressure test system for a radioactive tubular sample 700 according to an embodiment of the present application includes: at least one internal pressure furnace, a joint assembly device 30, and a sample handling device 20.

The internal pressure furnace comprises a furnace chamber and a pressure joint positioned in the furnace chamber. The pressure connector is adapted to be in sealing connection with the pressurizing connector 800' of the test sample 71 so as to supply a pressure medium to the inside of the test sample 71 through the pressure connector.

The joint assembly device 30 is used to mount a closing joint and a pressurizing joint at two ports of the radioactive tubular sample 700, respectively, to assemble the radioactive tubular sample 700 into the test sample 71.

The sample handling apparatus 20 is movable between any internal pressure furnace and the joint assembling apparatus 30 to transfer the test sample 71 to any internal pressure furnace, and can seal-connect or disconnect the pressurized joint 800' of the test sample 71 with the pressure joint of the internal pressure furnace. The sample loading and unloading device 20 is moved between any internal pressure furnace and the joint assembling device 30, and is respectively abutted with the joint assembling device 30 and the internal pressure furnace. Specifically, when the sample handling apparatus 20 is docked with the joint assembly apparatus 30, the sample handling apparatus 20 is in a transfer docking station and the test sample 71 can be transferred from the joint assembly apparatus 30 to the sample handling apparatus 20. When the sample handling apparatus 20 is docked with the internal pressure furnace, the sample handling apparatus 20 is in the internal pressure furnace docking station and the test sample 71 can be docked with the pressure tap 141 of the internal pressure furnace.

According to the internal pressure test system, the test sample 71 is assembled through the joint assembling device 30, the test sample 71 and the internal pressure furnace are assembled through the sample loading and unloading device 20, and compared with the operation and the assembly of a manipulator, the internal pressure test system can shorten the assembly time for carrying out the internal pressure test on the radioactive tubular sample, and improve the assembly quality.

The number of the internal pressure furnaces may be plural. Each of the internal pressure furnaces and the joint assembling device 30 are arranged in a predetermined direction (i.e., a first direction, see x-axis direction in the drawing), and the sample loading and unloading device 20 is configured to be movable in the first direction so as to be movable between any of the internal pressure furnaces and the joint assembling device 30 (specifically, the sample transfer mechanism 34).

The panel 110 may be provided with a slide rail 111 extending in the first direction, and the sample loading and unloading device 20 may be slidably disposed on the slide rail 111. A motor 21 may also be provided on the panel 110 for driving the sample handling apparatus 20 to slide along the slide rail 111. Each internal pressure furnace and joint assembly device 30 may be mounted on the panel 110.

In some embodiments, the internal pressure furnace is an internal pressure blast furnace 400. In some embodiments, the internal pressure furnace is an internal pressure creep furnace 100. In some embodiments, the internal pressure test system includes one internal pressure blast furnace 400 and a plurality of internal pressure creep furnaces 100.

Referring to fig. 4 and 5, a joint assembling device 30 provided in an embodiment of the present application includes: a sample holding mechanism 31, a joint pre-assembling mechanism 32, a joint tightening mechanism 33, and a sample transferring mechanism 34.

The sample holding mechanism 31 is for holding a radioactive tubular sample 700.

When the sample holding mechanism 31 holds the radioactive tubular sample 700, one port of the radioactive tubular sample 700 faces upward. In other words, when the sample holding mechanism 31 holds the radioactive tubular sample 700, the radioactive tubular sample 700 extends vertically.

The connector pre-assembly mechanism 32 is used to grasp the closed connector 800 or the pressurized connector 800' (hereinafter referred to as the connector) and pre-assemble the connector with the port of the radioactive tubular sample 700 facing upward.

The joint tightening mechanism 33 is used to tighten the preassembled joint with the radioactive tubular sample 700.

Referring to fig. 6, the sample transfer mechanism 34 includes a rotating portion 342 and a clamping portion 341 provided on the rotating portion 342. The clamping part 341 is used for clamping the radioactive tubular sample 700, and the rotating part 342 is used for driving the clamping part 341 to rotate in the horizontal plane so as to transfer the radioactive tubular sample 700 from the sample holding mechanism 31 (i.e. the joint preassembling station) to the joint tightening mechanism 33 (i.e. the tightening station).

The joint assembling device 30 of the embodiment of the application can automatically assemble the joint of the radioactive tubular sample 700 by arranging the sample holding mechanism 31, the joint pre-assembling mechanism 32, the joint tightening mechanism 33 and the sample transferring mechanism 34, and the whole assembly process does not need manual intervention, so that the assembly efficiency is greatly improved.

In some embodiments, when sample handling apparatus 20 is docked with connector assembly apparatus 30, sample handling apparatus 20 is in a transfer docking station that interfaces with sample transfer mechanism 34.

The clamping portion 341 may be configured to: the radioactive tubular sample 700 is clamped when the connector pre-assembly mechanism 32 pre-loads the connector with the port of the radioactive tubular sample 700 facing upward. That is, when the joint pre-assembly mechanism 32 pre-assembles the joint with the port of the radioactive tubular sample 700 facing upward, the radioactive tubular sample 700 is held by both the sample holding mechanism 31 and the clamping portion 341, thereby ensuring that the radioactive tubular sample 700 remains stable during pre-assembly, and facilitating improvement of the pre-assembly effect and efficiency.

Because the internal pressure test has higher sealing requirements on the joint, the screwing force of the manipulator operation cannot be guaranteed to meet the use requirements, so that the quality of the assembly between the cladding tube sample and the joint is lower. In the embodiment of the present application, the specific torque tightening can be achieved by the joint tightening mechanism 33, ensuring the assembly quality.

The sample transfer mechanism 34 may include a clamp drive for driving the clamp 341 to clamp or unclamp the radioactive tubular sample 700. The clamping portion 341 is connected to a clamping driving portion provided on the rotating portion 342, so that the clamping portion 341 is indirectly provided on the rotating portion 342 through the clamping driving portion. In some embodiments, the clamping portion 341 may be a clamping jaw and the clamping drive portion may be a clamping jaw cylinder 345. In other embodiments, the clamping drive may also be a motor.

The sample transfer mechanism 34 further includes a rotation drive portion to which the rotation portion 342 is coupled. The rotation driving part is used for driving the rotation part 342 to rotate around the vertical shaft in the horizontal plane. In some embodiments, the rotary drive may be a rotary cylinder 347. In other embodiments, the rotary drive may also be a motor.

In some embodiments, the sample transferring mechanism 34 may further include a turnover portion 343, and the clamping portion 341 is disposed on the rotating portion 342 through the turnover portion 343. The turning part 343 is used for driving the clamping part 341 to turn 180 degrees in the vertical plane after one port of the radioactive tubular sample 700 is screwed with the connector, so that the other port of the radioactive tubular sample 700 faces upwards, and the other port is assembled.

In such an embodiment, the sample transfer mechanism 34 has three functions, sample clamping, sample transfer, and sample flipping. The connector assembling device 30 of the embodiment of the application, through making the sample transferring mechanism 34 include the turnover part 343, can automatically assemble the connector at the other end after completing the assembly of the connector at one end of the radioactive tubular sample 700, and is very convenient.

It is readily understood that the turning portion 343 may be turned by the turning portion 342 to the turning station before the turning portion 343 is turned. At the flipping station, the flipping portion 343 does not interfere with other components when the clamping portion 341 and the radioactive tubular sample 700 are flipped.

The sample transfer mechanism 34 further includes an inversion driving section for driving the gripping section 341 to invert 180 degrees in a vertical plane about a horizontal axis. The inversion driving part may be an inversion cylinder 346. In other embodiments, the flip drive may be a motor.

Referring to fig. 6, the jaw is disposed on the jaw cylinder 345, and the jaw cylinder 345 is disposed on the turnover portion 343; the turnover part 343 is disposed on the turnover cylinder 346, and the turnover cylinder 346 is disposed on the rotation part 342; the rotating portion 342 is provided on the revolving cylinder 347. The jaw cylinder 345 drives the jaws through the air supply to perform sample gripping and the fitting pre-assembly mechanism 32 is engaged to perform pre-assembly of the fitting with the radioactive tubular sample 700. The rotary cylinder 347 rotates with the jaw cylinder 345, and transfers the radioactive tubular sample 700 held by the jaws between the joint preassembling station, the turning station, and the tightening station. After one end joint is screwed, the turning cylinder 346 drives the clamping jaw cylinder 345 to turn 180 degrees, and then the turning cylinder 347 is utilized to transfer back to the joint preassembling station for preassembling the other end joint.

In some embodiments, the sample transfer mechanism 34 may further include a vertical drive portion for driving the gripping portion 341 to move vertically. In some embodiments, the vertical drive is a lift cylinder 344. In other embodiments, the vertical drive may be a motor. When the radioactive tubular sample 700 needs to be taken out of the sample holding mechanism 31, the radioactive tubular sample 700 may be gripped by the gripping portion 341, and then the radioactive tubular sample 700 is lifted upward from the sample holding mechanism 31 by the vertical driving portion, so that the radioactive tubular sample 700 is separated from the sample holding mechanism 31, and the radioactive tubular sample 700 is transported to another station by the sample transport mechanism 34.

Since the clamping portion 341 is vertically adjustable in height, the radioactive tubular sample 700 is also facilitated to be engaged with the joint tightening mechanism 33 when the rotating portion 342 rotates the radioactive tubular sample 700 to the joint tightening mechanism 33.

Referring to fig. 6, the sample transport mechanism 34 may also include a support panel 348 and a bracket 349. The support panel 348 is mounted to a bracket 349 by a vertically extending slide bar. The vertical driving part drives the supporting panel 348 to move along the sliding bar, thereby driving the clamping part 341 to move vertically.

In some embodiments, referring to fig. 4 and 5, the joint assembly device 30 further includes: a joint holding mechanism 36 for holding at least one joint to be assembled. The joint holding mechanism 36 and the sample holding mechanism 31 are arranged in the first direction in the horizontal direction. That is, the joint pre-assembling mechanism 32 is disposed facing both the joint holding mechanism 36 and the sample holding mechanism 31. Alternatively, the joint holding mechanism 36 and the sample holding mechanism 31 are regarded as a whole, and the joint preassembly mechanism 32 is aligned with the whole in the horizontal direction along a second direction perpendicular to the first direction (i.e., the y-axis direction in the drawing).

Referring to fig. 4 and 5, the splice holding mechanism 36 can include a plurality of receiving slots 361, each receiving slot 361 for receiving a splice. The receiving grooves 361 are aligned in the first direction. The radioactive tubular sample 700 held by the sample holding mechanism 31 and the receiving grooves 361 are all positioned on the same straight line extending in the first direction, thereby facilitating the operation of the joint pre-assembly mechanism 32.

The dimensions of the receiving grooves 361 may not be exactly the same, so that connectors of different dimensions may be received.

Referring to fig. 5, the joint pre-assembly mechanism 32 includes: a gripping portion 321, a vertical driving portion 322, and a lateral driving portion 323.

The gripping portion 321 is located directly above the joint holding mechanism 36 or the sample holding mechanism 31 for gripping the joint. The vertical driving part 322 is used for driving the grabbing part 321 to move vertically. The lateral driving unit 323 is connected to the gripping unit 321, and drives the gripping unit 321 to move in the lateral direction, so that the gripping unit 321 can move directly above any of the receiving grooves 361 and directly above the radioactive tubular sample 700 held by the sample holding mechanism 31.

The lateral driving portion 323 is mounted on the bracket 324. The lateral driving part 323 drives the vertical driving part 322 to slide along the first direction. The vertical driving part 322 may drive the grip 321 to vertically slide with respect to the slide bar 325.

The vertical driving portion 322 is configured to drive the grabbing portion 321 to move vertically downward to grab the connector received in the receiving groove 361 when the grabbing portion 321 moves to a position right above the receiving groove 361; after the grabbing portion 321 grabs the joint, the grabbing portion 321 is driven to move upwards vertically, and when the grabbing portion 321 carries the joint to move to the position right above the radioactive tubular sample 700, the grabbing portion 321 is driven to move downwards vertically, and the joint is sleeved to one port of the radioactive tubular sample 700 to finish preassembly.

Referring to fig. 5, the sample holding mechanism 31 may be a pneumatic chuck configured to hold radioactive tubular samples 700 of different diameters.

Referring to fig. 7, the joint tightening mechanism 33 includes: a clamping portion 331 and a tightening portion 332. The clamping portion 331 is used to clamp the fixing member 810 of the joint. The tightening part 332 is disposed right above the clamping part 331 and is used for cooperating with the rotating member 820 of the joint to drive the rotating member 820 to rotate, so as to tighten the joint with the radioactive tubular sample 700.

In some embodiments, the joint tightening mechanism 33 may further include: a vertical driving part 333. The vertical driving part 333 is used for driving the tightening part 332 to move vertically relative to the clamping part 331 after the clamping part 331 clamps the fixing member 810 of the joint, so that the tightening part 332 is engaged with the rotating member 820 of the joint.

The vertical driving part 333 may be a motor. In other embodiments, the vertical drive 333 may be a cylinder.

The vertical driving portion 333 may drive the tightening portion 332 to move vertically along the vertical slide 335. The vertical slide 335 is fixedly disposed on the base 338. The tightening portion 332 may be fixedly connected to the sliding portion 337, and the sliding portion 337 is slidably disposed on the vertical slide 335.

Tightening portion 332 may be an adaptive sleeve to avoid positional deflection of the joint that may occur. The joint tightening mechanism 33 further includes a rotation driving portion 336 for driving the tightening portion 332 to rotate, thereby tightening the joint. The rotation driving part 336 may be a motor. The torque when the joint is screwed up can be adjusted through presetting the motor torque, so that the assembly quality of the radioactive tubular sample 700 is better ensured.

The clamping portion 331 may be fixedly disposed on the base 338. The clamping portion 331 may include two clamping jaws. The joint tightening mechanism 33 may include a jaw cylinder for driving the two jaws of the grip portion 331 to open and close. Because the clamping force provided by the jaw cylinder is slightly less than sufficient to ensure a relatively static holding of the fastener 810 during tightening, the joint tightening mechanism 33 may further include: the holding portion 334. The clamping portion 334 is used for clamping the clamping portion 331 after the clamping portion 331 clamps the fixing member 810 of the joint, so as to prevent the fixing member 810 from rotating during tightening.

In some embodiments, the catch 334 may have a wrench structure. The clamping portion 334 may be fixedly connected to the tightening portion 332, and when the vertical driving portion 333 drives the tightening portion 332 to move vertically downward relative to the clamping portion 331, the clamping portion 334 moves downward to clamp the clamping portion 331. When the vertical driving portion 333 drives the tightening portion 332 to move vertically upward with respect to the clamping portion 331, the catching portion 334 moves upward to disengage from the clamping portion 331.

In the embodiment shown in fig. 7, the holding portion 334 and the tightening portion 332 are fixedly connected to the sliding portion 337, so that the holding portion 334 and the tightening portion 332 move up and down simultaneously when the vertical driving portion 333 drives the sliding portion 337 to move up and down along the vertical sliding path 335.

The joint tightening mechanism 33, the sample transfer mechanism 34, and the sample holding mechanism 31 are arranged in the first direction, with the sample transfer mechanism 34 being located between the joint tightening mechanism 33 and the sample holding mechanism 31.

Specifically, referring to fig. 4, the rotational axis of the tightening portion 332 of the joint tightening mechanism 33, the rotational axis of the rotational portion 342 of the sample transfer mechanism 34, and the axis of the air chuck of the sample holding mechanism 31 are coplanar in the first direction, so that the rotational portion 342 of the sample transfer mechanism 34 is rotated 180 degrees to transfer the radioactive tubular sample 700 from the sample holding mechanism 31 to the joint tightening mechanism 33.

In order to reduce the volume of the cladding tube sample that needs to be filled with pressure medium when the cladding tube is subjected to an internal pressure test, a filling mandrel may be inserted into the cladding tube. Particularly when the pressure medium is gas, the gas compression ratio is large, so that the amount of gas required in filling is large. 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 medium (gas and liquid) can be prevented from being released into the internal pressure creep furnace after the cladding tube sample is broken, so that the damage of thermal shock to the internal pressure creep furnace is reduced.

The mandrel is generally cylindrical. The end 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 medium can flow conveniently. 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 inside diameter of the cladding tube. A plurality of mandrels may be axially loaded into each cladding tube. For example, for a 120mm cladding tube, the interior is filled with approximately 11 mandrels of length 10 mm.

In the related art, the filling of the mandrel is typically performed by an operator operating a robot outside the hot chamber. In the operation process, the problems of difficulty in alignment, small sizes of the cladding tube and the mandrel, visual angle caused by hot-chamber lead glass and the like exist in the operation of the manipulator, so that the filling process is time-consuming and labor-consuming. In addition, the pipe orifice of the cladding pipe is easy to be broken when the core shaft is filled by the manipulator, and air leakage is easy to occur when the cladding pipe sample is assembled in a sealing way in the later period, so that an internal pressure test is difficult to carry out.

Accordingly, the joint assembling device 30 of the embodiment of the present application further includes a mandrel filling mechanism 35 for filling the mandrel into the radioactive tubular sample 700 after the sample transfer mechanism 34 turns over the grip portion 341.

The rotating portion 342 of the sample transferring mechanism 34 is further configured to rotate the clamping portion 341 in a horizontal plane to transfer the radioactive tubular sample 700 to the mandrel filling mechanism 35 (i.e., the filling station).

Referring to fig. 8, the spindle loading mechanism 35 includes: a bracket, a funnel 352 and an elastic member 353. The bracket is provided with a through hole, and a funnel 352 is arranged at the through hole. Funnel 352 includes a tapered section 3521 and an outlet section 3522 that meets the lower end of tapered section 3521. The upper end opening of the tapered section 3521 is larger than the lower end opening. The outlet section 3522 fits within the through bore. The tapered section 3521 is for receiving a mandrel 900 to be filled. The outlet section 3522 may be a cylindrical section of uniform inner diameter.

By the rotation of the rotation portion 342, the radioactive tubular sample 700 held by the holding portion 341 can be positioned right below the outlet section 3522 (i.e., a filling station).

The inner diameter of the outlet section 3522 is greater than the diameter of the mandrel 900 and less than the length of the mandrel 900 to facilitate the mandrel 900 entering the tapered section 3521 being able to enter the radioactive tubular sample 700 located below the outlet section 3522 upright along the outlet section 3522. The manipulator only needs to put the mandrel 900 into the funnel 352, and compared with the mode that the manipulator directly loads the mandrel 900 into the radioactive tubular sample 700, the operation difficulty of the manipulator is greatly reduced in the embodiment of the application.

In embodiments of the present application, one mandrel 900 may be filled at a time. After the mandrel 900 in the funnel 352 enters the radioactive tubular sample 700, the manipulator places another mandrel 900 into the funnel 352 for further filling.

It will be readily appreciated that when the manipulator places the mandrel 900 into the tapered section 3521, the mandrel 900 may be laterally disposed within the tapered section 3521 and not slide down smoothly into the outlet section 3522 (i.e., the mandrel 900 resides within the tapered section 3521).

In the present embodiment, in order to enable the retained mandrel 900 to slide down smoothly into the outlet section 3522, in particular, the outlet section 3522 is mounted within the through-hole and configured to be operably slidable down the through-hole.

The elastic member 353 serves to provide an upward restoring force to the funnel 352 when the outlet section 3522 slides down the through hole, so that the mandrel 900 retained in the tapered section 3521 can be slid into the outlet section 3522 after being sprung up for replacement. The elastic member 353 may be, for example, a spring. In other embodiments, the resilient member 353 can be other conventional structures capable of providing a reverse restoring force.

Specifically, when the mandrel 900 stays in the conical section 3521, the manipulator presses down the funnel 352 to enable the outlet section 3522 to slide down relative to the through hole, then the manipulator moves away rapidly, the funnel 352 rebounds instantaneously under the action of the elastic member 353, at this time, the mandrel 900 in the funnel 352 is also sprung together, and the sprung mandrel 900 slides down the conical section 3521 to the outlet section 3522 smoothly with a high probability after changing the posture.

It can be seen that the manipulator in the present embodiment only needs to place the mandrel 900 in the tapered section 3521 of the funnel 352, and does not need to directly place the mandrel 900 into the radioactive tubular sample 700 with a smaller inner diameter, so that the mandrel 900 can enter the radioactive tubular sample 700 through the funnel 352. Even if the mandrel 900 is accidentally placed in the conical section 3521 horizontally, the mandrel 900 cannot slide down smoothly into the outlet section 3522, the mandrel 900 can be sprung up to change the posture only by pressing the funnel 352 by a mechanical arm, and the mandrel 900 can slide down into the outlet section 3522 with high probability under the guiding action of the conical section 3521 due to the chamfer at the end of the mandrel 900, and then into the radioactive tubular sample 700.

It will be readily appreciated that the radially inner surface of funnel 352 in the embodiments of the present application is provided smooth.

The spring (i.e., the resilient member 353) is sleeved over the outlet section 3522 of the funnel 352. The bottom of the outlet section 3522 of the funnel 352 protrudes downwardly through the aperture. Radially outward of the bottom of the outlet section 3522 is provided a stop for preventing the funnel 352 from escaping upwardly from the through hole.

In some embodiments, the mandrel charging mechanism 35 comprises: a plurality of funnels 352 and a plurality of elastic members 353. For example, the mandrel filling mechanism 35 may include 2, 3, 4, 5, and more hoppers 352. The support of the spindle loading mechanism 35 is provided with a plurality of through holes. The number of through holes and funnels 352 is the same. Each funnel 352 is mounted at one of the through holes.

In some embodiments, when the number of funnels 352 is multiple, the inner diameter of the outlet section 3522 of each funnel 352 is different for filling the mandrels 900 of different diameters, respectively.

In some embodiments, the support of the spindle loading mechanism 35 may include a base 3511 and a rotatable plate 3512 rotatably disposed on the base 3511. Through holes are formed on the rotating disk 3512, i.e., the funnel 352 is provided on the rotating disk 3512.

The rotation of the rotating portion 342 and the rotating disk 3512 enables the clamping portion 341 to be located at a position directly below the outlet section 3522 of either funnel 352.

Specifically, when filling the mandrel, the rotating portion 342 rotates to bring the clamping portion 341 to the mandrel filling station. The robot can rotate the funnel 352 to be used to the filling station. At this loading station, the radioactive tubular sample 700 held by the holding portion 341 is aligned with the outlet section 3522. The loading of the mandrel 900 is performed by actuation of the lift cylinder 344 which moves the open end of the radioactive tubular sample 700 upwardly into the outlet section 3522 of the funnel 352. After filling, the open end of the radioactive tubular sample 700 is removed downwardly from within the outlet section 3522 by actuation of the lifting cylinder 344.

Referring to fig. 9 and 10, the sample handling apparatus 20 includes: base 210, main body, holding unit 220, and rotating unit.

The base 210 may be movable along the panel 110 in a first direction. The main body is provided on the base 210. The holding part 220 is rotatably disposed on the main body part, and is used for holding the test sample 71 and driving the test sample 71 to rotate.

The holding portion 220 has an opening that mates with the pressurizing connector 800', so that the test sample 71 is held by receiving the pressurizing connector 800' in the opening.

The holding portion 220 may have an opening that mates with the rotational member 820 of the charging connector 800', it being readily understood that the opening of the holding portion 220 may function like a wrench.

Specifically, the circumference of the rotary member 820 of the test sample 71 may have at least one plane, and accordingly, the holding portion 220 has at least one mating surface mated with the at least one plane of the rotary member 820, so that when the holding portion 220 rotates, the holding portion 220 drives the test sample 71 to coaxially rotate due to the mating action of the holding portion 220 and the rotary member 820.

The rotating part of the sample loading and unloading device 20 is used for driving the holding part 220 to rotate clockwise or anticlockwise, so that the test sample 71 can be in threaded connection with the pressure joint 141 or can be in threaded connection with the pressure joint 141, and therefore the test sample 71 and the pressure joint 141 can be automatically screwed and dismounted.

The sample handling apparatus 20 further comprises: the holding portion 230 is provided in the main body portion and holds the test sample 71.

In some embodiments, the clamp 230 is a jaw that can be opened and closed.

Because the screwing and disassembling device is used for internal pressure testing, the sealing performance of the connection at the interface is high. In the screwing and disassembling process of the test sample 71, the clamping jaw is used for clamping the test sample 71 to ensure that the test sample 71 is always aligned with the pressure connector 141, and the test sample 71 is prevented from tilting, so that smooth matching between threads of the test sample 71 and threads of the pressure connector 141 is ensured, and simultaneously, sealing matching between a conical groove at the tail end of the threads of the pressure connector 141 and a circular table of the test sample 71 is ensured.

In some embodiments, the sample handling apparatus 20 may further comprise: and a moving part for driving the holding part 220 to move relative to the base 210 so that the holding part 220 holds the test sample 71 or separates from the test sample 71. In such an embodiment, after the test sample 71 is automatically screwed with the pressure joint 141, the holding part 220 is separated from the test sample 71 by the movement of the moving part, thereby allowing the upper furnace body of the internal pressure furnace to be unseated, so that the upper furnace body can seal the test sample 71 connected with the pressure joint 141 therein, and thus perform an internal pressure test on the test sample 71.

In some embodiments, the moving part includes: the horizontal moving part is used for driving the clamping part 230 and the holding part 220 to horizontally move towards the direction away from or towards the pressure joint 141.

In some embodiments, the mobile portion further comprises: the vertical moving part is used for driving the holding part 220 to move up and down relative to the base 210, so that the pressurizing connector 800' of the test sample 71 is accommodated in the opening of the holding part 220 or is staggered with the opening of the holding part 220.

In some embodiments, the body portion includes: a vertically extending support 241 and a horizontal support 242 liftably provided on the support 241. The holding portion 220 and the rotating portion are slidably provided on the horizontal bracket 242 in the horizontal direction.

The horizontal moving part is used to drive the holding part 220 and the rotating part to slide along the horizontal bracket 242. The horizontal bracket 242 is provided with a horizontal chute extending in a horizontal direction, and the horizontal moving part further includes a motor 2421 for driving the holding part 220 and the rotating part to slide along the horizontal chute.

The longitudinal moving part is used for driving the horizontal bracket 242 to slide up and down along the support 241. The support 241 is provided with a vertical chute extending vertically, and the longitudinal moving portion further includes a motor 2411 for driving the horizontal support 242 to slide along the vertical chute.

The clamping part 230, the holding part 220 and the rotating part can move along the horizontal direction under the drive of the horizontal moving part; and move along the vertical direction under the drive of the longitudinal moving part.

In some embodiments, the rotating portion includes: motor 251, speed reducer and driving medium. The speed reducer reduces the output rotation speed of the motor 251, and then transmits the reduced output rotation speed to the transmission member, and then to the holding portion 220 via the transmission member.

In some embodiments, the transmission may be a gear. The rotating part may further include: an encoder for recording the tightening angle of the gear, i.e., the direction of the opening of the holding portion 220.

The holding portion 220 may be a gear having a hollow inside and a notch communicating with the hollow (the hollow and the notch together form the opening). The hollow of the gear serves to hold the rotor 820 of the test specimen 71. The hollow perimeter of the gear may extend upwardly to form an extension to more stably retain the rotary member 820 of the test specimen 71.

In some embodiments, an origin switch 271 may be provided on the holding portion 220 for recording the zero point position of the tightening of the holding portion 220 (i.e., the position of the notch of the gear facing the pressure joint 141), so that the holding portion 220 and the clamping portion 230 can be smoothly withdrawn after tightening the pressurizing joint 800' of the test sample 71 with the pressure joint 141, and can be smoothly moved over the pressure joint 141 after removing the test sample 71.

In some embodiments, the internal pressure test system may further include: a control portion (not shown) that can be used to control the joint assembly device 30 to assemble the radioactive tubular sample 700 into the test sample 71.

The control unit may also be used to control the sample handling apparatus 20 to sealingly connect or disconnect the pressurized connector 800' of the test sample 71 to or from the pressure connector 141 of the internal pressure furnace.

Specifically, the control part is configured to control the clamping part 230 to clamp the test sample 71 when the rotating member 820 of the test sample 71 is received in the opening of the holding part 220 and the rotating part drives the holding part 220 to rotate in the first direction or the second direction. In such an embodiment, the clamping portion 230 continuously clamps the test sample 71, thereby ensuring accurate alignment of the test sample 71 with the pressure joint 141, preventing tilting of the test sample 71, resulting in rigid damage to the threads of the pressure joint 141 and the test sample 71 during rotation.

Further, the control part may be further configured to control the rotation part to rotate the holding part 220 such that the opening of the holding part 220 faces the pressure joint 141 and the holding part 220 is at the zero position when the rotation part 820 of the test sample 71 and the opening of the holding part 220 are staggered from each other.

In some embodiments, the control portion is further configured to: the control rotation part drives the holding part 220 and the test sample 71 to rotate at least one circle with a first moment, then the clamping part 230 is controlled to be released, and then the control rotation part drives the holding part 220 and the test sample 71 to rotate with a second moment which is larger than the first moment until the test sample 71 is screwed with the pressure joint 141. Thus, when the sample loading and unloading device 20 according to the embodiment of the present application is used to screw the test sample 71 and the pressure joint 141, the test sample 71 may be clamped by the clamping portion 230 in order to ensure that the test sample 71 is coaxial with the pressure joint 141 and to avoid damage to the threads of the pressure joint 141 and the test sample 71. In order to reduce the abrasion of the clamping part 230 and the radioactive tubular sample 700 caused by the relative rotation of the clamping part 230 and the radioactive tubular sample 700 of the test sample 71, the embodiment of the present application drives the holding part 220 and the test sample 71 to rotate at least one revolution (or at least one revolution), such as two weeks (two revolutions), with a small moment, so that the threads of the test sample 71 and the threads of the pressure connector 141 can be correctly matched, which is beneficial to avoiding damage to the threads of the pressure connector 141 and the test sample 71 caused by incorrect thread matching; and then the clamping part 230 is loosened, and the holding part 220 and the test sample 71 are driven to rotate to be screwed up by a large moment, so that abrasion to the clamping part 230 and the radioactive tubular sample 700 is avoided, and the sealing connection between the test sample 71 and the pressure joint 141 is ensured.

The motion control of the embodiment of the invention can completely adopt servo motion control, so that the measurement precision is higher, faster and more accurate. When the device is screwed, the test sample 71 can be screwed at the pressure joint 141, the screwing is performed according to the set torque, and the screwing position is recorded. When the device is disassembled, the device can automatically find the screwing angle for matching and disassembling. It can be seen that the sample loading and unloading device 20 according to the embodiment of the present invention uses the components such as the incomplete gear transmission, the motor, the speed reducer, the clamping jaw, the encoder, etc. to automatically screw/disassemble the test sample 71, and replaces the operator to perform the intelligent operation before the experiments such as the high temperature and the low temperature are performed.

Referring to fig. 11 to 14, an internal pressure creep furnace 100 of an embodiment of the present application includes: a base 13, a vacuum pipe 143, a pressure medium supply part and an upper furnace body 10.

The upper furnace body 10 is adapted to be coupled to the base 13 to form a sealed cavity 101.

The evacuation line 143 extends upwardly from the base 13 to the oven cavity 101. The pipe section of the vacuum line located inside the cavity 101 is provided with a through hole 1430 to vacuum the cavity 101 through the through hole 1430.

The pressure medium supply portion includes a pressure supply line 142 and a pressure joint 141 communicating with the pressure supply line 142. The pressure supply line 142 extends upward from the inside of the vacuum line 143 to the cavity 101.

Wherein, the lower part of the pressure joint 141 is embedded in the upper end opening of the vacuumizing pipeline 143 and is communicated with the pressure supply pipeline 142.

The pressure joint 141 is adapted to be sealingly connected to the test sample 71 so as to provide a pressure medium to the interior of the test sample 71. The pressure connector 141 may have a threaded interface, and the pressurized connector 800' of the test sample 71 and the pressure connector 141 may be connected by a threaded seal.

The internal pressure creep furnace 100 of the embodiment of the present application may further include: a fixed table 11 and a rotary table 12. The stationary table 11 may be provided stationary. For example, the fixing table 11 may be mounted on the panel 110, or the fixing table 11 is the panel 110 itself. The rotary table 12 is rotatably provided above the fixed table 11. In other words, the rotary table 12 is disposed above the fixed table 11 and is rotatable with respect to the fixed table 11.

Referring to fig. 13, a base 13 is provided on the rotary table 12 to follow the rotation of the rotary table 12. Specifically, the base 13 is fixedly disposed on the rotary table 12, and when the rotary table 12 rotates, the base 13 is driven to coaxially and synchronously rotate.

The base 13 includes: a hollow rotation shaft 131, the rotation shaft 131 extending downward to below the fixed stage 11 through the rotation stage 12 and the fixed stage 11 in this order. The evacuation line 143 extends upwardly inside the rotary shaft 131 to above the base 13. The rotation shaft 131 is fixedly connected to the rotary table 12, and is rotatable relative to the fixed table 11 and the vacuum line 143.

The pressure supply line 142 and the upper end of the rotation shaft 131 may be provided with a bushing 133.

According to the embodiment of the application, the vacuumizing pipeline 143 is arranged between the pressure supply pipeline 142 and the rotating shaft 131, so that the space can be reasonably utilized, and the pressure supply pipeline 142 can be protected by the vacuumizing pipeline 143.

It will be readily appreciated that when the base 13 rotates with the turntable 12, the upper furnace body 10 rotates coaxially and synchronously with the base 13.

According to the embodiment of the application, the rotary table 12 is arranged, so that the base 13 and the upper furnace body 10 can relatively rotate with the pressure medium supply part, and therefore when an internal pressure test is carried out, the heating part can rotate around the test sample 71, and the temperature uniformity of the test sample 71 is ensured in the high-temperature internal pressure test process, so that the measurement accuracy is prevented from being influenced by the local temperature difference of the test sample 71.

In some embodiments, upper furnace body 10 is configured to be movable up and down relative to base 13 so as to interface with base 13 to collectively form furnace chamber 101 for sealing pressure fitting 141 and test sample 71 therein; or separate from the base 13 to expose the pressure fitting 141 and test sample 71.

In some embodiments, internal pressure creep furnace 100 may be a lift furnace. The internal pressure creep furnace 100 further includes: a plurality of support rods 1921 and a drive mechanism. The upper furnace body 10 is vertically slidably provided on a plurality of support rods 1921 by means of sliders 1922. The driving mechanism is used for driving the upper furnace body 10 to vertically move relative to the base 13.

The drive mechanism may include a vertical drive 1933 and a transmission assembly. The vertical driving part 1933 may be a servo motor. The transmission assembly may include: a screw shaft 1931 and a ball nut. The ball nut is connected to the upper furnace body 10, and moves along the axial direction of the screw shaft 1931 when the screw shaft 1931 rotates, thereby driving the upper furnace body 10 to ascend or descend.

In some embodiments, the side wall of the upper furnace body 10 is provided with a measurement window 18 for observing the test sample 71 in the furnace chamber 101. When the upper furnace body 10 is joined with the base 13 to form the furnace chamber 101 together, the measurement window 18 faces the test sample 71.

In some embodiments, the internal pressure creep furnace 100 further includes: the measuring sensor 181 is configured to rotate following the rotary table 12 and is disposed facing the measuring window 18 for measuring profile data of the test sample 71 in the oven cavity 101.

In order to measure the test sample 71 in the furnace chamber 101 in real time in the process of the internal pressure test by using the measuring sensor 181, the embodiment of the present application is provided with the measuring window 18 on the side wall of the upper furnace body 10, so that the measuring sensor 181 can measure the test sample 71 in the furnace chamber 101 in real time through the measuring window 18. It is easy to understand that since the embodiment of the present application is provided with the measuring window 18 at the side wall of the upper furnace body 10, there is a significant temperature difference in the circumferential direction of the temperature inside the furnace chamber 101. According to the embodiment of the application, the rotary table 12 is arranged, so that the base 13 and the upper furnace body 10 can relatively rotate with the pressure medium supply part and the test sample 71, and the temperature uniformity of the circumferential direction of the test sample 71 is guaranteed in the high-temperature internal pressure test process, so that the measurement accuracy is prevented from being influenced by the local temperature difference of the test sample 71.

Further, since the internal pressure creep furnace 100 of the embodiment of the present application can measure the test sample 71 in the furnace chamber 101 in real time through the measurement window 18, the real state of the test sample 71 at different temperatures, different pressures and different times can be measured; meanwhile, the measuring sensor 181 can rotate along with the rotary table 12, namely, can rotate around the test sample 71, so that the measuring sensor 181 can measure the sizes of the test sample 71 in different circumferential directions, circumferential scanning of the test sample 71 is realized, and the authenticity and reliability of measured data are improved.

As can be seen, the internal pressure creep furnace 100 according to the embodiment of the present application, by providing the measurement sensor 181, the measurement window 18, and the rotary table 12, achieves real-time and accurate measurement of the test sample 71 in the furnace chamber 101 during the internal pressure test.

In some embodiments, the measurement sensor 181 may be fixedly provided to the rotary table 12 or the upper furnace body 10 so as to rotate with the rotary table 12. In other words, the height of the measurement sensor 181 with respect to the turntable 12 or the upper furnace body 10 is constant and rotates with the turntable 12.

In some embodiments, the internal pressure creep furnace 100 further includes: the sensor lifting mechanism 182 is used for driving the measuring sensor 181 to move up and down so as to measure the profile data of the test sample 71 at different heights in the oven cavity 101. Thus, the internal pressure creep furnace 100 according to the embodiment of the present application can further realize full-size profile measurement of the test sample 71 at any position including the axial direction and the circumferential direction, and further improve the authenticity and accuracy of measurement data.

In some embodiments, the measurement window 18 is made of transparent glass. In some embodiments, the measurement sensor 181 may be a CCD. In some embodiments, measurement sensor 181 may be a laser ranging sensor. The laser ranging sensor includes a transmitter for transmitting laser light and a receiver for receiving the laser light. At this time, the number of the measurement windows 18 is two, and the two measurement windows 18 are oppositely disposed. The transmitter and receiver are each disposed facing one of the measurement windows 18 to measure the diameter of the test sample 71 using a laser. The measurement principle of the laser ranging sensor is well known to those skilled in the art, and will not be described here.

The sensor lifting mechanism 182 drives the transmitter and the receiver of the laser ranging sensor to move up and down simultaneously, thereby ensuring that the receiver is arranged opposite to the transmitter in real time to measure the outline data of the test sample 71 at different heights.

In some embodiments, the upper furnace body 10 includes: a housing 15, a heat insulating layer 160, a heating part 170 and a temperature measuring part.

A cavity having an opening at the lower side is formed in the housing 15. The heat insulating layer 160 is disposed inside the housing 15, and the heat insulating layer 160 defines the cavity 101. The heating part 170 is disposed at a radial inner side of the insulation layer 160 for heating the cavity 101. The side wall 152 of the shell 15 is provided with a measuring window 18, and a position of the lateral heat preservation layer facing the measuring window 18 is provided with a yielding groove. The temperature measuring part is used to measure the temperature of the cavity 101.

In some embodiments, the base 13 comprises: the bottom insulating ring 132, and the pressure supply pipe 142 extends upward to the cavity 101 radially inward of the bottom insulating ring 132.

Referring to fig. 12, a hollow rotation shaft 131 is provided at the radially inner side of the bottom insulating ring 132, and the rotation shaft 131 extends downward to the fixing table 11 sequentially through the rotation table 12 and the fixing table 11. The rotation shaft 131 is fixedly connected to the rotary table 12 and is rotatable relative to the fixed table 11. The pressure supply line 142 extends upwardly inside the rotation shaft 131 to the cavity 101 above the base 13. The rotation shaft 131 is rotatable relative to the pressure supply line 142.

The internal pressure creep furnace 100 further includes: the rotation driving unit is provided on the fixed table 11 and drives the rotary table 12 to rotate relative to the fixed table 11. A plurality of support rods 1921 extend vertically upward from the turntable 12. The rotation driving part may be a servo motor.

Referring to fig. 14, in some embodiments, the evacuation lines 143 include an upper evacuation line 1431 located above and a lower evacuation line 1432 located below. The inner diameter of the upper vacuum line 1431 is greater than the inner diameter of the lower vacuum line 1432, so that the upper vacuum line 1431 can be used to support the pressure joint 141, and the vacuum effect can be improved due to the increased space between the vacuum line 143 and the pressure supply line 142. The through hole 1430 may be provided on the upper vacuum line 1431.

The inner diameter of the lower vacuum line 1432 is larger than the outer diameter of the pressure supply line 142 so that there is a gap therebetween, so that air in the cavity 101 can flow out through the gap when vacuum is drawn.

The lower portion of the upper vacuum line 1431 is located inside the rotation shaft 131, and the portion of the upper vacuum line 1431 located inside the rotation shaft 131 may be provided with at least one through hole 1430, thereby facilitating the evacuation of the inside of the rotation shaft 131.

In some embodiments, the internal pressure creep furnace 100 of an embodiment of the present application may further include: a sealing sleeve 1951, a plurality of sealing rings 1952, and a vacuum chamber 144.

The sealing sleeve 1951 passes through the fixing table 11 and is fixedly connected with the fixing table 11. The rotation shaft 131 extends downward into the sealing sleeve 1951, and the lower end of the rotation shaft 131 is located radially inward of the sealing sleeve 1951.

A sealing ring 1952 is disposed within the sealing sleeve 1951 and configured to abut against the rotating shaft 131 to form a dynamic seal. The vacuum chamber 144 is located below the sealing sleeve 1951. The evacuation line 143 extends downwardly beyond the rotary shaft 131 and the sealing sleeve 1951 and communicates with the vacuum chamber 144. It will be readily appreciated that the vacuum chamber 144 is not in communication with the sealing sleeve 1951, and that the vacuum chamber 144 is in communication with the oven cavity 101 only via the evacuation line 143, thereby evacuating the oven cavity 101 with the vacuum pump. The vacuum chamber 144 has a vacuum suction port 1441, and the vacuum suction port 1441 is connected to a vacuum pump through a pipe.

The pressure supply line 142 extends from the evacuation line 143 into the vacuum chamber 144. After exiting the vacuum chamber 144, the supply line 142 may be in communication with a high pressure medium source via a line to provide high pressure medium from the high pressure medium source.

In some embodiments, the high pressure medium source is a high pressure argon source. In some embodiments, after the pressure supply pipeline 142 comes out of the vacuum cavity 144, the pressure supply pipeline can be respectively communicated with a high-pressure argon source and a vacuum pump through a tee joint, so that the vacuum pump can be used for vacuumizing the test sample 71 before the pressure medium is supplied to the test sample 71, and then the high-pressure argon source is used for supplying argon to the test sample 71; the vacuum-pumping operation and the argon-supplying operation are repeated so many times that the air in the test sample 71 is pumped away. Thereafter, a pressure medium was supplied to the test sample 71 by a high-pressure argon gas source, and an internal pressure test was performed.

The embodiment of the application also provides an internal pressure test method for the radioactive tubular sample. Referring to fig. 15, the internal pressure test method includes steps S1 to S3.

Step S1: the closing joint 800 and the pressurizing joint 800' are installed at two ports of the radioactive tubular sample 700, respectively, using the joint assembling device 30 to assemble the radioactive tubular sample 700 into the test sample 71.

Step S2: the sample loading/unloading device 20 is used to move the test sample 71 to a predetermined internal pressure furnace, and the pressurizing connector 800' of the test sample 71 is hermetically connected to the pressure connector 141 of the internal pressure furnace.

Step S3: the test sample 71 was subjected to an internal pressure test in an internal pressure furnace.

According to the internal pressure test method, the test sample 71 is assembled through the joint assembling device 30, the test sample 71 and the internal pressure furnace are assembled through the sample loading and unloading device 20, and compared with the operation and the assembly of a manipulator, the internal pressure test method can shorten the assembly time of carrying out the internal pressure test on the radioactive tubular sample and improve the assembly quality.

Assembling the sample in step S1 may specifically include mounting one connector to one port of the radioactive tubular sample 700, rotating the radioactive tubular sample 700 180 degrees, and mounting another connector to another port of the radioactive tubular sample 700.

Specifically, the method of installing a connector at one port of the radioactive tubular sample 700 includes steps S11 to S14.

Step S11: the radioactive tubular sample 700 is held by the sample holding mechanism 31 such that one port of the radioactive tubular sample 700 faces upward.

Step S12: a connector is grasped by the connector preassembly mechanism 32 and preassembled with the port of the radioactive tubular sample 700 facing upward.

Step S13: the radioactive tubular sample 700 is transported from the sample holding mechanism 31 to the joint tightening mechanism 33 (i.e., at the tightening station) using the sample transport mechanism 34.

Step S14: the preassembled fitting is screwed with the radioactive tubular sample 700 using the fitting screw-down mechanism 33.

Before step S11, the two types of connectors may be placed in the receiving grooves 361 of the connector holding mechanism 36, respectively, by using a robot arm, and then the radioactive tubular sample 700 may be clamped on the air chuck to wait for pre-assembly.

In step S12, the gripping part 321 is driven by the lateral driving part 323 of the joint pre-assembling mechanism 32 to move above a specific joint, the gripping part 321 is driven by the vertical driving part 322 to descend, the joint is gripped, then the gripping part 321 is driven by the lateral driving part 323 to horizontally translate to be right above the radioactive tubular sample 700, then the gripping part 321 is driven by the vertical driving part 322 to descend, and the joint is sleeved at the upper end part of the radioactive tubular sample 700, so that the pre-assembling of the joint is completed. The radioactive tubular sample 700 may be held by the holding portion 341 of the sample transfer mechanism 34 while the radioactive tubular sample 700 is preassembled with the adapter using the adapter preassembly mechanism 32.

In step S13, after the radioactive tubular sample 700 is preassembled with the connector, the lifting cylinder 344 of the sample transfer mechanism 34 is lifted up, so that the clamping portion 341 drives the radioactive tubular sample 700 to be taken out from the air chuck of the connector holding mechanism 36; the rotary cylinder 347 rotates 180 ° to the joint tightening mechanism 33 position.

In step S14, the clamping portion 331 of the joint tightening mechanism 33 clamps the radioactive tubular sample 700, the vertical driving portion 333 drives the sleeve to descend, the rotator 820 that is fitted over the joint at the end of the radioactive tubular sample 700, and the clamping portion 334 clamps the clamping portion 331; the rotation driving part 336 starts to drive the sleeve to rotate, and stops rotating after reaching the set torque, so as to realize the final assembly of the joint and the radioactive tubular sample 700.

In some embodiments, the method of rotating the radioactive tubular sample 700 180 degrees includes steps S15-S16.

Step S15: the sample transfer mechanism 34 is used to transfer the radioactive tubular sample 700 to the flipping station. At the inversion station, the radioactive tubular sample 700 does not interfere with other components when inverted 180 degrees in the vertical plane.

Step S16: the sample transport mechanism 34 is used to turn the radioactive tubular sample 700 180 degrees in a vertical plane so that the other port of the radioactive tubular sample 700 is facing up.

After one port of the radioactive tubular sample 700 is screwed with the connector, steps S15 to S16 may be performed.

In step S16, the radioactive tubular sample 700 is rotated to the loading station using the rotating portion 342 of the sample transfer mechanism 34. The rotating disk 3512 of the mandrel filling mechanism 35 is rotated to rotate the predetermined funnel 352 to the filling station, where the port of the radioactive tubular sample 700 is aligned with the outlet section 3522. The mandrel 900 is plunged into the funnel 352 by manual manipulation of the manipulator, causing the mandrel 900 to fall down the funnel 352 into the interior of the radioactive tubular sample 700.

In some embodiments, the method of installing another connector at another port of the radioactive tubular sample 700 includes repeating steps S12 through S14.

In some embodiments, when it is desired to fill the mandrel 900 into the radioactive tubular sample 700, after rotating the radioactive tubular sample 700 180 degrees, it may further include filling the mandrel 900 into the radioactive tubular sample 700, and then installing another connector into another port of the radioactive tubular sample 700.

In some embodiments, filling the mandrel 900 into the radioactive tubular sample 700 includes steps S17-S18.

Step S17: the sample transfer mechanism 34 is used to transfer the radioactive tubular sample 700 to a filling station where the radioactive tubular sample 700 interfaces with the outlet section 3522 of one funnel 352 of the mandrel filling mechanism 35.

Step S18: the radioactive tubular sample 700 is filled with a mandrel by the mandrel filling mechanism 35.

In some embodiments, step S2 may specifically include steps S21 to S23.

Step S21: the sample transfer mechanism 34 is used to transfer the radioactive tubular sample 700 to the transfer docking station, and the base 210 of the sample handling apparatus 20 is moved in the first direction so that the holding portion 220 is docked with the clamping portion 341 of the sample transfer mechanism 34. At this transfer docking station, test sample 71 is transferred from grip 341 into the opening of holder 220 and grip 230.

Step S22: the sample handling apparatus 20 is used to transport the radioactive tubular sample 700 to an internal furnace docking station where the pressurized connector 800' of the radioactive tubular sample 700 is aligned with the pressure connector 141.

Step S23: the radioactive tubular sample 700 is screwed with the pressure fitting 141 using the sample handling apparatus 20.

In step S21, the clamp portion 230 and the holding portion 220 are located at the initial positions. The opening of the holding portion 220 faces the direction of the pressure joint 141 (i.e., the direction as shown in fig. 10, which may be referred to as the zero point position), and the clamping portion 230 clamps the test sample 71.

In step S22, the test sample 71 is moved from the initial position to the working position above the pressure joint 141 aligned with the pressure joint 141 (i.e., the axis of the screw joint 840 coincides with the axis of the pressure joint 141) by the horizontal movement section. The test sample 71 is moved down to a first vertical position with the longitudinal movement to bring the end portion of the threaded interface 840 into the pressure joint 141.

In step S23, the motor 251 provides a first torque to rotate the holding portion 220 for two turns, and then the clamping portion 230 is released, and the motor 251 provides a second torque greater than the first torque to rotate the holding portion 220 to rotate the test specimen 71 to screw with the pressure joint 141. After tightening, the tapered groove at the threaded end of the pressure fitting 141 sealingly engages the frustoconical surface at the end of the test specimen 71.

After tightening, the direction of the opening of the holding portion 220 may be oriented to any position, and the direction of the opening of the holding portion 220 (i.e., the angle of the opening from the zero point position) is recorded with an encoder. The holding portion 220 is raised to a second vertical position (i.e., a position where the lower end surface of the holding portion 220 is higher than the upper end surface of the rotary member 820 of the test sample 71) by the longitudinal moving portion so that the opening of the holding portion 220 is separated from the rotary member 820 of the test sample 71. The opening direction of the holding portion 220 is turned to the zero point position shown in fig. 10. The holding portion 220 and the clamping portion 230 are returned to the initial positions by the horizontal movement portion.

In some embodiments, the internal pressure furnace is an internal pressure creep furnace 100, and performing an internal pressure test on the test sample 71 in the internal pressure furnace may include steps S31 to S34.

Step S31: the upper furnace body 10 of the internal pressure creep furnace 100 is hermetically connected with the base 13 to form a furnace chamber 101.

Step S32: the test sample 71 is heated and the furnace chamber 101 is evacuated, after which the test sample 71 is filled with a pressure medium.

Step S33: a base 13 of the rotary internal pressure creep furnace 100 and an upper furnace body 10.

Step S34: the profile data of the test sample 71 in the oven cavity 101 is measured by the measuring sensor 181.

In some embodiments, the internal pressure test method further comprises: after the internal pressure test, the pressurizing connector 800' of the test sample 71 is detached from the pressure connector 141 by the sample loading/unloading device 20.

The method of detaching the pressurized connector 800' of the test sample 71 from the pressure connector 141 may specifically include the following steps 1-9.

1. The clamping part 230 is opened and the opening of the holding part 220 is turned to the zero position facing the direction of the pressure joint 141.

2. The holding portion 220 is moved up to a second vertical position higher than the upper end face of the rotary member 820 of the test specimen 71 by the longitudinally moving portion.

3. The holding portion 220 and the clamping portion 230 are moved from the initial position to the working position by the horizontal movement portion, and at this time, the test sample 71 is positioned in the opening of the holding portion 220 and in the clamping portion 230.

4. By the encoder recording the direction of the opening of the holding portion 220 in step 6 of the tightening process, the opening direction of the holding portion 220 is turned to this position so as to be adapted to the angle of the rotary member 820 of the test sample 71 in the tightened state.

5. The holding portion 220 is moved down to the first vertical position by the longitudinal moving portion so that the rotary member 820 of the test sample 71 is accommodated in the opening.

6. The clamping portion 230 is closed, and the test sample 71 is clamped.

7. The holding portion 220 is rotated by the motor 251 to unscrew the test sample 71 until the screw interfaces 840 are all unscrewed from the pressure joints 141.

8. The holding portion 220 is rotated to the zero position shown in fig. 10, the test sample 71 is gripped by the hot chamber robot, and thereafter the gripping portion 230 is released, and the test sample 71 is taken out by the hot chamber robot.

9. The holding portion 220 and the clamping portion 230 are returned to the initial positions by the horizontal movement portion.

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

The present invention is not limited to the above embodiments, but the scope of the invention is defined by the claims.

Claims

1. An internal pressure test system for a radioactive tubular sample, comprising:

At least one internal pressure furnace, each internal pressure furnace comprising a furnace chamber and a pressure joint positioned in the furnace chamber, wherein the pressure joint is used for being in sealing connection with a pressurizing joint of the test sample so as to provide pressure medium for the interior of the test sample; and

the sample loading and unloading device can move between any internal pressure furnace and the joint assembling device so as to transfer the test sample to any internal pressure furnace, and the test sample pressurizing joint and the pressure joint of the internal pressure furnace can be connected or disconnected in a sealing way;

wherein, the joint assembling device includes:

a sample holding mechanism for holding the radioactive tubular sample such that one port of the radioactive tubular sample faces upward;

the joint preassembling mechanism is used for grabbing a joint and preassembling the joint and the port of the radioactive tubular sample, which faces upwards;

the joint tightening mechanism is used for tightening the preassembled joint and the radioactive tubular sample; and

the sample transferring mechanism comprises a rotating part and a clamping part arranged on the rotating part, the clamping part is used for clamping the radioactive tubular sample, and the rotating part is used for driving the clamping part to rotate in a horizontal plane so as to transfer the radioactive tubular sample from the sample holding mechanism to the joint tightening mechanism;

The sample loading and unloading device comprises:

a main body portion configured to be movable in a preset direction;

the clamping part is arranged on the main body part and used for clamping the test sample;

a holding portion rotatably provided to the main body portion for holding the test sample;

a horizontal moving part for driving the clamping part and the holding part to horizontally move in a direction away from or close to the pressure joint of the internal pressure furnace;

and the rotating part is used for driving the holding part to rotate clockwise or anticlockwise, so that the pressurizing connector of the test sample and the pressure connector are in threaded connection or are in threaded connection release.

2. The system of claim 1, wherein the at least one internal pressure oven and the joint assembly device are aligned in the predetermined direction in a horizontal plane, the sample handling device being configured to be movable in the predetermined direction so as to be movable between any of the internal pressure ovens and the joint assembly device.

3. The system of claim 1, wherein the sample transport mechanism further comprises:

and the turnover part is used for driving the clamping part to turn over 180 degrees in a vertical plane after one port of the radioactive tubular sample is screwed with the joint, so that the other port of the radioactive tubular sample faces upwards.

4. The system of claim 3, wherein the joint assembly device further comprises:

the mandrel filling mechanism is used for filling a mandrel into the radioactive tubular sample after the sample transferring mechanism turns over the clamping part;

the rotating part of the sample transferring mechanism is further used for driving the clamping part to rotate in the horizontal plane so as to transfer the radioactive tubular sample to the mandrel filling mechanism.

5. The system of claim 4, wherein the mandrel loading mechanism comprises:

the bracket is provided with a through hole;

a funnel comprising a conical section and an outlet section connected to a lower end of the conical section, wherein the outlet section is mounted within the through bore and configured to operably slide down the through bore; and

an elastic member for providing an upward restoring force to the funnel when the outlet section slides down the through hole;

the sample transferring mechanism can enable the clamping part to be located right below the outlet section through rotation of the rotating part.

6. The system of claim 1, wherein the charging connector comprises a threaded interface;

The holding part is provided with an opening matched with the pressurizing connector, so that the testing sample is held by accommodating the pressurizing connector in the opening;

the sample handling apparatus further comprises: and the longitudinal moving part is used for driving the clamping part and the holding part to move vertically, so that the pressurizing connector is contained in the opening of the holding part or is staggered with the opening of the holding part.

7. The system of claim 1, wherein the internal pressure furnace is an internal pressure blasting furnace or an internal pressure creeping furnace.

8. The system of claim 7, wherein the internal pressure creep furnace further comprises:

a base;

the upper furnace body is connected with the base to jointly form the furnace chamber;

the vacuumizing pipeline extends upwards from the base to the furnace chamber, and a pipe section of the vacuumizing pipeline positioned in the furnace chamber is provided with a through hole so as to vacuumize the furnace chamber through the through hole; and

a pressure supply pipeline which extends upwards from the interior of the vacuumizing pipeline to the furnace chamber,

the lower part of the pressure joint is embedded into the upper end opening of the vacuumizing pipeline and is communicated with the pressure supply pipeline.

9. The system of claim 8, wherein the internal pressure creep furnace further comprises:

a fixed table; and

the rotating table is rotatably arranged above the fixed table; the base and the upper furnace body are arranged on the rotary table so as to rotate along with the rotary table;

the base includes: a hollow rotating shaft which passes through the rotating table and the fixed table in turn downwards and extends to the lower part of the fixed table,

the vacuumizing pipeline extends upwards to the position above the base in the rotating shaft;

the rotating shaft is fixedly connected with the rotating table and can rotate relative to the fixed table and the vacuumizing pipeline.

10. The system of claim 9, wherein a side wall of the upper furnace body is provided with a measurement window, the measurement window facing the test sample when the upper furnace body is joined with the base to collectively form the furnace chamber;

the internal pressure creep furnace further includes: and a measuring sensor configured to rotate following the rotary table and disposed facing the measuring window for measuring profile data of the test sample in the oven cavity.

11. An internal pressure test method for a radioactive tubular sample, comprising:

installing two connectors at two ports of a radioactive tubular sample respectively by utilizing a connector assembling device so as to assemble the radioactive tubular sample into a test sample, wherein the two connectors comprise a closed connector and a pressurizing connector;

performing an internal pressure test on the test sample in the internal pressure furnace;

the fitting assembly device for installing two fittings at two ports of a radioactive tubular sample, respectively, comprises:

holding the radioactive tubular sample with a sample holding mechanism such that one port of the radioactive tubular sample is facing upward;

grabbing a joint by using a joint pre-assembling mechanism, and pre-assembling the joint and an upward port of the radioactive tubular sample;

transferring the radioactive tubular sample from the sample holding mechanism to a joint tightening mechanism using a sample transfer mechanism;

the pre-assembled joint is screwed with the radioactive tubular sample by the joint screwing mechanism;

The method for moving the test sample to a preset internal pressure furnace by using a sample loading and unloading device, and sealing and connecting a pressurizing connector of the test sample with a pressure connector of the internal pressure furnace comprises the following steps:

the sample transferring mechanism is utilized to drive the test sample to be transferred to a transferring and docking station, and the base of the sample loading and unloading device is moved along a first direction, so that the holding part of the sample loading and unloading device is docked with the clamping part of the sample transferring mechanism; at the transfer docking station, transferring the test sample from the clamping portion of the sample transfer mechanism into the opening of the holding portion of the sample handling apparatus and the clamping portion of the sample handling apparatus;

conveying the test sample to a docking station of the internal pressure furnace by using the sample loading and unloading device, wherein a pressurizing connector of the test sample is aligned with the pressure connector at the docking station;

the test sample is screwed with the pressure fitting using the sample handling apparatus.

12. The method as recited in claim 11, further comprising:

and after the internal pressure test is finished, the pressurizing connector of the test sample is detached from the pressure connector by using a sample loading and unloading device.

13. The method of claim 11, wherein the installing two connectors at two ports of the radioactive tubular sample, respectively, using a connector assembly device, further comprises:

after one port of the radioactive tubular sample is screwed with the joint, the sample transferring mechanism is utilized to drive the radioactive tubular sample to turn over 180 degrees in a vertical plane so that the other port of the radioactive tubular sample faces upwards;

filling a mandrel into the radioactive tubular sample by using a mandrel filling mechanism;

and transferring the radioactive tubular sample filled with the mandrel to the sample holding mechanism by using the sample transferring mechanism so as to mount another connector on another port of the radioactive tubular sample.

14. The method of claim 11, wherein the internal pressure furnace is an internal pressure creep furnace, and wherein the internal pressure testing of the test sample in the internal pressure furnace comprises:

the upper furnace body of the internal pressure creep furnace is connected with the base in a sealing way to form a furnace chamber;

heating the test sample, vacuumizing a furnace chamber, and filling a pressure medium into the test sample;

and rotating the base and the upper furnace body of the internal pressure creep furnace, and measuring the outline data of the test sample in the furnace chamber by using a measuring sensor.