Fuel element sealing test device and method thereof

Abstract

The invention discloses a fuel element sealing test device and method. The fuel element sealing test device comprises a fixing unit 100, a test unit 200 and a chamber unit 300. By simulating the operating environment of the high-temperature gas cooled reactor fuel element, the wear loss test of the spherical fuel element is carried out, so that the motion state of the simulated environment of the spherical fuel element is more diversified, and the wear loss test result of the spherical fuel element is more accurate; abrasion objects attached to the surface of the spherical fuel element are cleaned in time in the movement process, so that the situation that large deviation is generated in the actual abrasion simulation process due to too many abrasion objects in the simulation process of the spherical fuel element is avoided, and the test result is further more accurate; the air environment in the chamber can be replaced by helium under the action of the chamber unit, the operating environment of the spherical fuel element can be simulated through a test, and the influence of helium on the wear of the spherical fuel element can be tested through a control group.

Description

Technical Field

[0001] The invention relates to the technical field of high temperature gas-cooled reactor fuel operation, in particular to a fuel element sealing test device and method thereof. Background Art

[0002] The high temperature gas-cooled reactor is an advanced high temperature prototype reactor technology. Its main purpose is to develop a safe, economical and environmentally friendly new nuclear reactor to meet the growth of future energy demand. It is characterized by not using coolant circulation, but using direct expansion of gas to achieve heat removal, thereby improving heat conversion efficiency and reducing operating costs. The important role of spherical fuel elements in high temperature gas-cooled reactors is to provide stable energy output and ensure the normal and safe operation of the reactor.

[0003] In order to effectively verify the wear amount of spherical fuel elements, it is necessary to simulate the operating environment of high-temperature gas-cooled reactor fuel elements and carry out spherical fuel element wear tests. However, since the movement process of spherical fuel elements during the test is difficult to simulate, and the wear amount of spherical fuel elements cannot be accurately calculated due to the fine slag attached to the surface during the wear process, large errors occur in the simulation. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problem of large wear error of simulated spherical fuel elements mentioned above or in the prior art, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a fuel element sealing test device and method thereof, which can simulate the actual wear environment of a spherical fuel element and perform a control simulation test.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a fuel element sealing test device, which includes a fixing unit, including a support assembly, and a pipe assembly arranged on the upper part of the support assembly;

[0008] The test unit includes a power assembly and a wear assembly disposed on the upper portion of the power assembly;

[0009] The chamber unit includes a protection component and a collection component disposed on the upper portion of the protection component;

[0010] The support assembly includes a fixed round seat, a wear test disc arranged on the upper part of the fixed round seat, a barrier cover fixedly connected to the upper part of the wear test disc, through grooves arranged on both sides of the barrier cover, and a partition plate arranged on the upper part of the fixed round seat.

[0011] As a preferred solution of the fuel element sealing test device of the present invention, the protective assembly includes an extended partition arranged on the upper part of the partition plate, a square cover body arranged on both sides of the extended partition body, a closed side plate arranged on one side of the square cover body, and two sets of valves arranged on the upper part of the square cover body.

[0012] As a preferred solution of the fuel element sealing test device of the present invention, the collecting assembly includes a collecting box.

[0013] As a preferred solution of the fuel element sealing test device of the present invention, the extended partition is fixedly connected to the partition plate, the square cover is fixedly connected to one side of the extended partition, and the closed side plate is fixedly connected to one side of the square cover.

[0014] As a preferred solution of the fuel element sealing test device of the present invention, the collection box is fixedly connected to the lower part of the wear test plate, and the collection box is fixedly connected to one side of the extended partition.

[0015] As a preferred embodiment of the fuel element sealing test device of the present invention, the wear test disc is provided with a test arc surface on the upper part, two sets of concave slide rails are provided on the upper part of the test arc surface, two sets of placement chute grooves are provided on the upper part of the test arc surface, and a through hole is provided at the bottom of the placement chute groove;

[0016] The pipeline assembly includes a first pipeline, a second pipeline arranged on one side of the first pipeline, a first pipeline top bracket fixedly connected to one side of the first pipeline, a first pipeline bottom bracket fixedly connected to one side of the first pipeline, a second pipeline top bracket fixedly connected to one side of the second pipeline, a second pipeline bottom bracket fixedly connected to one side of the second pipeline, and cleaning brushes respectively arranged at the bottom of the first pipeline and the second pipeline.

[0017] As a preferred solution of the fuel element sealing test device of the present invention, the power assembly includes a built-in motor, a rolling wheel arranged on the upper part of the built-in motor, a protective shell arranged on one side of the rolling wheel, two sets of ball inlets arranged at the bottom of the protective shell, two sets of ball outlets arranged on the upper part of the protective shell, two sets of baffles arranged on one side of the protective shell, and a cross test track arranged on one side of the rolling wheel;

[0018] The wear assembly comprises a plurality of groups of spherical test elements and a pressure rotating disk arranged on the upper part of the spherical test elements.

[0019] To solve the above technical problems, the present invention provides the following technical solutions: A test method includes a fuel element sealing test device, which includes placing a fuel element on a fixing unit;

[0020] The gas in the chamber is replaced by the inlet and outlet valves of the chamber unit;

[0021] Start the test unit;

[0022] According to the needs, after running for a certain period of time, remove the fuel element;

[0023] The fuel elements are cleaned, weighed, and the weights m1', m2', m3', ... mn' after the wear test are recorded;

[0024] Calculate the average wear based on the initial weight and the weight after the wear test

[0025] {(m1'+m2'+m3'+...+mn')-(m1+m2+m3+...+mn)} / n.

[0026] As a preferred embodiment of the test method of the present invention, replacing the gas in the chamber through the chamber unit inlet and exhaust valve includes replacing the gas in the chamber through the chamber inlet and exhaust valve, replacing the air in the chamber with helium, simulating the operating environment of the spherical fuel element.

[0027] As a preferred solution of the test method of the present invention, starting the test unit includes starting a power component to simulate a wear environment for the fuel element.

[0028] Beneficial effects of the present invention: the present invention simulates the operating environment of high-temperature gas-cooled reactor fuel elements to carry out wear test of spherical fuel elements, and can divide the spherical fuel elements into two groups of different sizes for simultaneous simulation during operation, thereby reducing the time of spherical fuel element simulation test as a whole, making the motion state of the simulated environment of the spherical fuel elements more diversified, thereby making the wear test result of the spherical fuel elements more accurate, and by timely cleaning the wear materials attached to the surface of the spherical fuel elements during the movement, the spherical fuel elements will not have a large deviation in the actual wear simulation process due to excessive wear materials during the simulation process, thereby further making the test result more accurate, and the air environment in the chamber can be replaced by helium through the action of the chamber unit, so that the operating environment of the spherical fuel elements can be simulated through experiments, and the influence of helium on the wear of the spherical fuel elements can be tested through a control group. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0030] Figure 1 This is a schematic diagram of the overall structure of the fuel element sealing test device.

[0031] Figure 2 This is a schematic diagram of the overall structure of the fuel element sealing test device.

[0032] Figure 3 This is a schematic diagram of the internal structure of the chamber of the fuel element sealing test device.

[0033] Figure 4 This is a schematic top view of the internal structure of the chamber of the fuel element sealing test device.

[0034] Figure 5 This is a schematic top view of the internal structure of the chamber of the fuel element sealing test device.

[0035] Figure 6 This is a schematic diagram of the structure of the fixing unit and the testing unit of the fuel element sealing test device.

[0036] Figure 7 Schematic diagram of the internal structure of the power assembly of the fuel element sealing test device.

[0037] Figure 8 The figure is a schematic diagram of the overall flow of the test method. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0041] Example 1

[0042] Reference Figures 1 to 7 , which is the first embodiment of the present invention, provides a fuel element sealing test device, which includes a fixing unit 100, a test unit 200 and a chamber unit 300, which can simulate the actual wear environment of the spherical fuel element and perform a control simulation test.

[0043] Specifically, the fixing unit 100 includes a support assembly 101 and a pipe assembly 102 disposed on the upper portion of the support assembly 101;

[0044] The test unit 200 includes a power assembly 201 and a wear assembly 202 disposed on the upper portion of the power assembly 201;

[0045] The chamber unit 300 includes a protection component 301 and a collection component 302 disposed on the upper portion of the protection component 301;

[0046] The support assembly 101 includes a fixed round seat 101a, a wear test disc 101b arranged on the upper part of the fixed round seat 101a, a barrier cover 101c fixedly connected to the upper part of the wear test disc 101b, through grooves 101d arranged on both sides of the barrier cover 101c, and a partition plate 101e arranged on the upper part of the fixed round seat 101a, the partition plate 101e is provided with a rotating groove adapted to the rolling wheel 201b and the pressure rotating disc 202b, and the partition plate 101e is arranged in the middle of the barrier cover 101c.

[0047] Furthermore, the protection assembly 301 includes an extended partition 301a arranged on the upper part of the partition plate 101e, a square cover body 301b arranged on both sides of the extended partition 301a, a closed side plate 301c arranged on one side of the square cover body 301b, and two sets of valves 301d arranged on the upper part of the square cover body 301b. The valve 301d can exhaust or intake air through existing technology to replace the air in the chamber with helium.

[0048] Furthermore, the collection component 302 includes a collection box 302a, which is quasi-quarter-circular in shape and can collect wear residues of the spherical test element 202a that slides down from the through hole 101b-4. A collection cabinet is provided inside the collection box 302a, and the collection cabinet is slidably connected to the collection box 302a to facilitate the removal of wear residues.

[0049] Furthermore, the extended partition 301a is fixedly connected to the partition plate 101e, the square cover body 301b is fixedly connected to one side of the extended partition 301a, and the closed side plate 301c is fixedly connected to one side of the square cover body 301b.

[0050] Furthermore, the collection box 302a is fixedly connected to the lower portion of the wear test plate 101b, and the collection box 302a is fixedly connected to one side of the extended partition 301a.

[0051] Further, the wear test disc 101b is provided with a test camber 101b-1 on the upper part, two groups of recessed slide rails 101b-2 on the upper part of the test camber 101b-1, two groups of placement chute 101b-3 on the upper part of the test camber 101b-1, and a through hole 101b-4 provided at the bottom of the placement chute 101b-3. The connection between the recessed slide rail 101b-2 and the test camber 101b-1 is an inclined surface. The recessed slide rail 101b-2 allows the spherical test element 202a to pass through and roll through the through groove 101d and roll into the barrier cover 101c. The placement chute 101b-3 is shallower than the recessed slide rail 101b-2. The through hole 101b-2 is connected to the bottom of the wear test disc 101b to allow fine wear residue to pass through.

[0052] The pipe assembly 102 includes a first pipe 102a, a second pipe 102b arranged on one side of the first pipe 102a, a first pipe top bracket 102c fixedly connected to one side of the first pipe 102a, a first pipe bottom bracket 102d fixedly connected to one side of the first pipe 102a, a second pipe top bracket 102e fixedly connected to one side of the second pipe 102b, a second pipe bottom bracket 102f fixedly connected to one side of the second pipe 102b, and a cleaning brush 102g respectively arranged at the bottom of the first pipe 102a and the second pipe 102b. The first pipe 102a has a thicker diameter than the second pipe 102b. The first pipe 102a and the second pipe 102b are respectively suitable for spherical test elements 202a of different sizes. The first pipe 102a is higher than the upper pipe mouth of the second pipe 102b in the direction of the cross test track 201g.

[0053] Furthermore, the power assembly 201 includes a built-in motor 201a, a rolling wheel 201b disposed on the upper part of the built-in motor 201a, a protective shell 201c disposed on one side of the rolling wheel 201b, two sets of ball inlets 201d disposed at the bottom of the protective shell 201c, two sets of ball outlets 201e disposed on the upper part of the protective shell 201c, two sets of blocking plates 201f disposed on one side of the protective shell 201c, and a cross test track 201g disposed on one side of the rolling wheel 201b. The ball outlets 201e are divided into two sizes, one large and one small, which correspond to the spherical test elements 202a of different sizes respectively. The larger ball outlet 201e is connected to the first pipe 10 2a corresponds to the upper pipe opening, the smaller ball outlet 201e corresponds to the upper pipe opening of the second pipe 102b, the cross test track 201g is two sets of staggered and threaded hollow tracks along the outer side of the rolling wheel 201b, the spherical test element 202a has two sets of sizes, one large and one small, which are respectively arranged on both sides of the partition plate 101e, the large size corresponds to one side of the first pipe 102a, and the small size spherical test element 202a corresponds to one side of the second pipe 102b. Different sets of sizes can be set in the same number for simulation according to specific test needs. The upper part of the pressure rotating disk 202b is a circular bottom and the angle with the test arc surface 101b-1 is an arc surface with a smaller angle closer to the bottom;

[0054] The wear assembly 202 includes several groups of spherical test elements 202a and a pressure rotating disk 202b arranged on the upper part of the spherical test elements 202a. The spherical test elements 202a can be placed in the gap between the wear test disk 101b and the pressure rotating disk 202b. The large-size group of spherical test elements 202a is adapted to the diameter of the first pipe 102a and is larger than the diameter of the second pipe 102b. The small-size group of spherical test elements 202a is adapted to the size of the second pipe 102b.

[0055] Preferably, when the rolling wheel 201b rotates, the protective shell 201c fixedly connected to the outer side of the rolling wheel 201b and the pressure rotating disk 202b fixedly connected to the outer side of the protective shell 201c will be driven to rotate. When the pressure rotating disk 202b rotates, the spherical test elements 202a of different sizes located at the lower part of the pressure rotating disk 202b will roll under the pressure of the pressure rotating disk 202b and produce certain wear to form a rolling wear simulation with a certain pressure, until the spherical test element 202a rolls to the concave slide rail 101b-2. Due to the deeper groove of the concave slide rail 101b-2, the spherical test element 202a will roll and fall through the through groove 101d. When the rolling wheel 201b rotates, the spherical test elements 202a of different sizes will contact and rub against each other in the cross-test track 201g and gradually rise, until the smaller spherical test elements 202a are on the side of the second pipe 102b and enter the second pipe 102b through the centrifugal force when the rolling wheel 201b rotates, and then the larger spherical test elements 202a cannot pass through due to their larger size and slide out and enter the first pipe 102a when they rotate to the side of the first pipe 102a.

[0056] Preferably, the two groups of spherical test elements 202a of different sizes will respectively contact a cleaning brush 102g near the bottom of the first pipe 102a and the second pipe 102b when rolling to the bottom of the first pipe 102a and the second pipe 102b, and the cleaning brush 102g will clean the wear fine residue attached to the outside of the spherical test elements 202a. Then, when the spherical test elements 202a fall out of the pipe mouth, they will fall on the test arc surface 101b-1 on one side of the placement chute 101b-3 on both sides. The wear fine residue will flow to the through hole 101b-4 through the gap at the bottom of the slope of the placement chute 101b-3, and slide along the through hole 101b-4 to the collection box 302a to collect the fine residue for another simulation test, and then pass. Then, the spherical test element 202a continues to roll on the test arc surface 101b-1 under the rotation of the pressure rotating disk 202b and repeats the simulation test process.

[0057] It should be noted that the wear test disc 101b is fixedly connected to the upper part of the fixed round seat 101a, the partition plate 101e is fixedly connected to the fixed round seat 101a, the partition plate 101e is fixedly connected to the barrier cover 101c, the first pipe top bracket 102c, the first pipe bottom bracket 102d, the second pipe top bracket 102e and the second pipe bottom bracket 102f are respectively fixedly connected to the upper part of the wear test disc 101b, the cleaning brush 102g is respectively arranged at the bottom of the first pipe 102a and the second pipe 102b, the rolling wheel 201b is rotatably connected to the wear test disc 101b, the protective shell 201c is fixedly connected to the rolling wheel 201b, the spherical test element 202a is adapted to the wear test disc 101b, the spherical test element 202a is adapted to the first pipe 102a and the second pipe 102b, and the spherical test element 202a is adapted to the cross test track 201f;

[0058] One side of the placement chute 101b-3 is a slope, so that the spherical test element 202a can be placed on the test arc surface 101b-1 on one side of the slope. When the spherical test element 202a is located on the placement chute 101b-3, the wear fine residue can slide from the hollow bottom of the slope of the placement chute 101b-3 to the through hole 101b-4. The blocking plate 201f is fixedly arranged on the upper part of the wear test disk 101b. The smaller ball outlet 201e cannot pass the larger spherical test element 202a. The cleaning brush 102g is a plurality of groups of circular soft brushes distributed along the direction of the pipeline and can be bent to prevent the spherical test element 202a from rolling out. The cleaning brush 102g is not provided with a soft brush on the side close to the ground. The pressure rotating disk 202b is fixedly connected to the outer side of the protective shell 201c. The pressure rotating disk 202b is located on the upper part of the blocking cover 101c and there is a certain gap. The rolling wheel 201b is connected to the built-in motor 201a. The pressure rotating disk 202b is connected to the driving shaft of the first pipe 102a, and the pressure rotating disk 202b can be disassembled and installed through the existing technology. The simulation test cannot bear the long-term use, resulting in the wear of the larger spherical test element 202a to a smaller size, affecting the experimental results. The protective component 301 can be disassembled and assembled through the existing technology. The spherical test element 202a is divided into two groups of several spherical test elements 202a of different sizes. The larger spherical test element 202a is preset on one side of the first pipe 102a, and the smaller spherical test element 202a is preset on one side of the second pipe 102b and the two groups of spherical test elements 202a of different sizes are separated by the partition plate 101e. The angle formed between the pressure rotating disk 202b and the wear test disk 101b, which becomes smaller as it approaches the bottom, will make the spherical test elements 202a of different sizes located between the wear test disk 101b and the pressure rotating disk 202b and stop sliding down.

[0059] First, the air state in the chamber is changed through valve 301d, and the natural air in the chamber can be selectively replaced with helium 7MPa according to the test requirements.

[0060] The built-in motor 201a is started to rotate the scroll wheel 201b disposed on the upper part of the built-in motor 201a. When the scroll wheel 201b rotates, the protective shell 201c fixedly connected to the outer side of the scroll wheel 201b and the pressure rotating disk 202b fixedly connected to the outer side of the protective shell 201c are driven to rotate. When the pressure rotating disk 202b rotates, the spherical test elements 202a of different sizes located at the lower part of the pressure rotating disk 202b are rolled under the pressure of the pressure rotating disk 202b and a certain amount of wear is generated to form a rolling wear simulation with a certain pressure, until the spherical test element 202a rolls to the concave slide rail 101b-2. Due to the deeper groove of the concave slide rail 101b-2, the spherical test element 2 02a rolls and falls into the blocking cover 101c through the through groove 101d, and rolls to the goal hole 201d under the obstruction of the blocking plate 201f, and enters the cross test track 201g through the goal hole 201d. When the rolling wheel 201b rotates, the spherical test elements 202a of different sizes will contact and rub against each other in the cross test track 201g and gradually rise, until the smaller spherical test element 202a is on the side of the second pipe 102b, it will enter the second pipe 102b through the centrifugal force when the rolling wheel 201b rotates, and then the larger size will not be able to pass through due to its large size and will slide out and enter the first pipe 102a when it rotates to the side of the first pipe 102a.

[0061] During the cleaning stage, the two groups of spherical test elements 202a of different sizes will respectively contact a cleaning brush 102g near the bottom of the first pipe 102a and the second pipe 102b when rolling to the bottom of the first pipe 102a and the second pipe 102b, and the cleaning brush 102g will clean the wear fine residue attached to the outside of the spherical test elements 202a. Then, when the spherical test elements 202a fall out of the pipe mouth, they will fall on the test arc surface 101b-1 on one side of the placement chute 101b-3 on both sides. The wear fine residue will flow to the through hole 101b-4 through the gap at the bottom of the slope of the placement chute 101b-3, and slide along the through hole 101b-4 to the collection box 302a to collect the fine residue for another simulation test. Then, the spherical test elements 202a continue to roll on the test arc surface 101b-1 under the rotation of the pressure rotating disk 202b and repeat the simulation test process.

[0062] In summary, the present invention simulates the operating environment of high-temperature gas-cooled reactor fuel elements to carry out wear test of spherical fuel elements, and can divide the spherical fuel elements into two groups of different sizes for simultaneous simulation during operation, thereby reducing the time of the spherical fuel element simulation test as a whole, making the motion state of the simulated environment of the spherical fuel elements more diversified, thereby making the wear test results of the spherical fuel elements more accurate, and by timely cleaning the wear materials attached to the surface of the spherical fuel elements during the movement, the spherical fuel elements will not have a large deviation in the actual wear simulation process due to excessive wear materials during the simulation process, thereby further making the test results more accurate, and the air environment in the chamber can be replaced by helium through the action of the chamber unit, so that the operating environment of the spherical fuel elements can be simulated through experiments, and the influence of helium on the wear of the spherical fuel elements can be tested through a control group.

[0063] Example 2

[0064] Reference Figure 8 , which is the second embodiment of the present invention, provides a test method, which can help staff understand the simulation test process and the calculation method after the test.

[0065] Specifically, the fuel element is placed on the fixing unit 100;

[0066] The gas in the chamber is replaced by the inlet and outlet valves of the chamber unit 300;

[0067] Start the test unit 200;

[0068] According to the needs, after running for a certain period of time, remove the fuel element;

[0069] The fuel elements are cleaned, weighed, and the weights m1', m2', m3', ... mn' after the wear test are recorded;

[0070] Based on the initial weight and the weight after the wear test, calculate the average wear amount {(m1'+m2'+m3'+…+mn')-(m1+m2+m3+…+mn)} / n.

[0071] Furthermore, replacing the gas in the chamber through the inlet and exhaust valves of the chamber unit 300 includes replacing the gas in the chamber through the inlet and exhaust valves of the chamber, replacing the air in the chamber with helium 7MPa to simulate the operating environment of the spherical fuel element.

[0072] Furthermore, the start-up test unit 200 includes a start-up power assembly 201 to simulate a wear environment for the fuel element.

[0073] In summary, by setting up the test method, it is convenient for the staff to be familiar with the operating steps of the device, and it is convenient for the staff to preset, repair and replace, which improves work efficiency, makes it convenient for the staff to quickly master the usage methods and operating procedures, and makes it convenient for the staff to understand the calculation process after the test.

[0074] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0075] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0076] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A fuel element sealing test device, characterized in that: include, A fixing unit (100) comprises a supporting assembly (101) and a pipe assembly (102) arranged on the upper part of the supporting assembly (101); A test unit (200) comprises a power assembly (201) and a wear assembly (202) arranged on the upper part of the power assembly (201); The chamber unit (300) comprises a protection component (301) and a collection component (302) arranged on the upper part of the protection component (301); The support assembly (101) comprises a fixed round seat (101a), a wear test disc (101b) arranged on the upper part of the fixed round seat (101a), a barrier cover (101c) fixedly connected to the upper part of the wear test disc (101b), through grooves (101d) arranged on both sides of the barrier cover (101c), and a partition plate (101e) arranged on the upper part of the fixed round seat (101a).

2. The fuel element sealing test device according to claim 1, characterized in that: The protection component (301) comprises an extended partition (301a) arranged on the upper part of the partition plate (101e), a square cover (301b) arranged on both sides of the extended partition (301a), a closed side plate (301c) arranged on one side of the square cover (301b), and two sets of valves (301d) arranged on the upper part of the square cover (301b).

3. The fuel element sealing test device according to claim 2, characterized in that: The collection assembly (302) includes a collection box (302a).

4. The fuel element sealing test device according to claim 3, characterized in that: The extended partition (301a) is fixedly connected to the partition plate (101e), the square cover (301b) is fixedly connected to one side of the extended partition (301a), and the closed side plate (301c) is fixedly connected to one side of the square cover (301b).

5. The fuel element sealing test device according to claim 4, characterized in that: The collection box (302a) is fixedly connected to the lower part of the wear test disc (101b), and the collection box (302a) is fixedly connected to one side of the extended partition (301a).

6. The fuel element sealing test device according to claim 5, characterized in that: The wear test disc (101b) is provided with a test camber (101b-1) on the upper part, two groups of recessed slide rails (101b-2) are provided on the upper part of the test camber (101b-1), two groups of placement slant grooves (101b-3) are provided on the upper part of the test camber (101b-1), and a through hole (101b-4) is provided at the bottom of the placement slant groove (101b-3); The pipe assembly (102) comprises a first pipe (102a), a second pipe (102b) arranged at one side of the first pipe (102a), a first pipe top bracket (102c) fixedly connected to one side of the first pipe (102a), a first pipe bottom bracket (102d) fixedly connected to one side of the first pipe (102a), a second pipe top bracket (102e) fixedly connected to one side of the second pipe (102b), a second pipe bottom bracket (102f) fixedly connected to one side of the second pipe (102b), and cleaning brushes (102g) respectively arranged at the bottom of the first pipe (102a) and the second pipe (102b).

7. The fuel element sealing test device according to claim 6, characterized in that: The power assembly (201) comprises a built-in motor (201a), a rolling wheel (201b) arranged on the upper part of the built-in motor (201a), a protective shell (201c) arranged on one side of the rolling wheel (201b), two groups of ball inlets (201d) arranged at the bottom of the protective shell (201c), two groups of ball outlets (201e) arranged on the upper part of the protective shell (201c), two groups of baffles (201f) arranged on one side of the protective shell (201c), and a cross test track (201g) arranged on one side of the rolling wheel (201b); The wear assembly (202) includes a plurality of groups of spherical test elements (202a) and a pressure rotating disk (202b) arranged on the upper part of the spherical test elements (202a).

8. A test method, characterized in that: The fuel element sealing test device according to any one of claims 1 to 7; and placing a fuel element on the fixing unit (100); replacing the gas in the chamber through the inlet and outlet valves of the chamber unit (300); Starting the test unit (200); According to the needs, after running for a certain period of time, remove the fuel element; The fuel elements are cleaned, weighed, and the weights m1', m2', m3', ... mn' after the wear test are recorded; Calculate the average wear based on the initial weight and the weight after the wear test {(m1'+m2'+m3'+...+mn')-(m1+m2+m3+...+mn)} / n.

9. The test method according to claim 8, characterized in that: The replacing of the gas in the chamber through the inlet and outlet valve of the chamber unit (300) comprises replacing the gas in the chamber through the inlet and outlet valve of the chamber, replacing the air in the chamber with helium (7MPa), and simulating the operating environment of the spherical fuel element.

10. The test method according to claim 9, characterized in that: The starting of the test unit (200) includes starting the power assembly (201) to make the fuel element simulate a wear environment.

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