A detachable sealing plug for detecting the tightness of a cladding tube

Abstract

A detachable sealing detection plug of a cladding tube, comprising an outer shaft sleeve compression screw, a special-shaped double-end nut, an inner shaft sleeve compression screw, the outer shaft sleeve compression screw is sleeved on the cladding tube, the right end of the outer shaft sleeve compression screw is connected with a sealing ring A and a sealing ring B, and there is an outer sleeve ring between the sealing ring A and the sealing ring B, the outer sleeve ring is sleeved on the outside of the cladding tube; the right side of the outer sleeve ring is an outer top sleeve, the outer top sleeve is sleeved on the outside of the cladding tube, and the right end of the outer top sleeve is in contact with the inner shaft sleeve compression screw; the sealing ring A, the sealing ring B, the outer sleeve ring and the outer top sleeve are all located between the outer shaft sleeve compression screw and the special-shaped double-end nut; the whole device is simple in structure design, reasonable in layout, uniform in cladding stress, easy to disassemble as a whole, realizes non-destructive sealing of the cladding, realizes effective sealing of the new ceramic material thin-wall cladding, and good application effect is achieved.

Description

Technical Field

[0001] This application relates to the field of sealing technology for ceramic-clad tubes, specifically to a removable sealing test plug for clad tubes. Background Technology

[0002] In the development of new fuel elements, ceramic cladding is increasingly valued for its excellent radiation resistance and high-temperature mechanical properties. Ceramic cladding tubes are often manufactured using braiding and sintering processes. To fully ensure the safety of the fuel element, non-destructive testing of the cladding's sealing performance is necessary. Unlike traditional zirconium alloy cladding, welding and sealing of the new material cladding is more difficult, requiring process performance evaluation to ensure weld quality, making pre-welding sealing testing challenging. For sealing this new material cladding, a metal plug combined with a sealing ring is typically used, utilizing the mechanical deformation of the sealing ring to achieve a seal at the port. However, due to the thin wall thickness of the ceramic cladding tube (generally less than 1mm), traditional mechanically deformed metal plugs result in significant deformation and are prone to cracking. Furthermore, the inherent brittleness of the cladding material and the processing techniques result in poor sealing performance from conventional plugs, easily causing irreversible damage to the cladding, thus contradicting the purpose of non-destructive testing. Utility Model Content

[0003] The purpose of this application is to provide a detachable sealing test plug for a ceramic-clad tube, thereby solving the problem of port closure in the sealing test of ceramic-clad tubes.

[0004] The technical solution of this application is as follows: a sealing test plug for a detachable casing tube, including an outer bushing clamping screw, a special-shaped double-ended nut, and an inner bushing clamping screw. The outer bushing clamping screw is fitted on the casing tube. The right end of the outer bushing clamping screw is connected to sealing ring A and sealing ring B, and there is an outer ring between sealing ring A and sealing ring B. The outer ring is fitted on the outside of the casing tube.

[0005] The outer sleeve is located on the right side of the outer ring. The outer sleeve is fitted outside the casing tube, and the right end of the outer sleeve is in contact with the inner shaft sleeve clamping screw.

[0006] Sealing ring A, sealing ring B, outer ring, and outer top sleeve are all located between the outer shaft sleeve clamping screw and the special-shaped double-ended nut;

[0007] The inner bushing clamping screw is installed inside the casing tube. Its left end has sealing rings C and D, and there is an inner sleeve between sealing rings C and D. The inner sleeve is installed on the inner mandrel. The right end of the inner mandrel passes through the irregular double-ended nut, while sealing rings C, D, and the inner sleeve are located between the inner mandrel and the inner wall of the casing tube.

[0008] The area where the outer ring contacts the sealing rings A and B has a bevel structure.

[0009] The outer bushing clamping screw and the irregular double-ended nut 3 have a threaded structure for contact, and at the same time, they have a bevel structure, so that the sealing rings A and B are pressed tightly against the outer wall of the casing tube.

[0010] There is a bevel structure between the inner mandrel and the sealing rings C and D. The inner mandrel is connected to the irregular double-ended nut by the nut. With the bevel structure, the sealing rings C and D press against the inner wall of the casing tube.

[0011] Both ends of the casing tube are sealed using the removable casing tube sealing test plugs.

[0012] The significant advantages of this application are: the entire device has a simple and reasonable structural design, uniform stress on the shell, and is easy to disassemble, achieving a non-destructive seal on the shell. This patent has enabled the effective sealing of the thin-walled shell made of novel ceramic material, and has been successfully applied to the sealing performance testing in the fuel element development process, including but not limited to shells made of novel ceramic and metal materials, achieving good application results. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a leak test plug for a removable sheathed tube;

[0014] In the diagram: 1-Shell tube, 2-Outer shaft sleeve clamping screw, 3-Irregular double-ended nut, 4-Sealing ring A, 5-Outer outer ring, 6-Outer top sleeve, 7-Inner shaft sleeve clamping screw, 8-Inner ring, 9-Inner mandrel, 10-Sealing ring B, 11-Sealing ring C, 12-Sealing ring D. Detailed Implementation

[0015] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0016] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0017] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first.

[0018] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] A removable sheathing tube sealing test plug is used to seal the sheathing tube 1, such as... Figure 1 As shown, it includes an outer bushing clamping screw 2, a special-shaped double-ended nut 3, and an inner bushing clamping screw 7. The outer bushing clamping screw 2 is fitted onto the casing tube 1, and its contact surface with the special-shaped double-ended nut 3 has a threaded structure. The right end of the outer bushing clamping screw 2 is connected to sealing ring A4 and sealing ring B10, and there is an outer ring 5 between sealing ring A4 and sealing ring B10. The outer ring 5 is fitted onto the outside of the casing tube 1, and the part of it that contacts sealing ring A4 and sealing ring B10 has a bevel structure.

[0020] The outer sleeve 5 is located on the right side of the outer top sleeve 6. The outer top sleeve 6 is fitted outside the casing tube 1, and the right end of the outer top sleeve 6 is in contact with the inner shaft sleeve clamping screw 7.

[0021] Sealing ring A4, sealing ring B10, outer ring 5, and outer top sleeve 6 are all located between the outer shaft sleeve clamping screw 2 and the irregular double-ended nut 3. The outer shaft sleeve clamping screw 2 and the irregular double-ended nut 3 are connected by threads and, together with the bevel structure, make sealing ring A4 and sealing ring B10 press against the outer wall of the casing tube 1, thereby enhancing the sealing effect.

[0022] The inner bushing clamping screw 7 is installed inside the casing tube 1. Its left end has sealing rings C11 and D12, with an inner sleeve 8 between them. The inner sleeve 8 is mounted on the inner mandrel 9, and there is a bevel structure between the inner mandrel 9 and the sealing rings C11 and D12. The right end of the inner mandrel 9 passes through a shaped double-ended nut 3 and is connected to it via a nut. The sealing rings C11, D12, and 8 are located between the inner mandrel 9 and the inner wall of the casing tube 1. With the bevel structure, the sealing rings C11 and D12 press against the inner wall of the casing tube 1, achieving a sealing effect.

[0023] This embodiment demonstrates the sealing of the right end of the casing tube, while the sealing of the left end of the casing tube is the same as in this embodiment;

[0024] The above description is merely a preferred embodiment of this patent and is not intended to limit this patent. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this patent shall be included within the scope of protection of this patent.

[0025] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0026] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0027] The preferred embodiments disclosed above are merely illustrative of this application. The optional embodiments do not exhaustively describe all details, nor do they limit this application to only the specific implementations described. Clearly, many modifications and variations can be made based on the content of this application. These embodiments are selected and specifically described in this application to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application.

Claims

1. A removable sheathed tube sealing test plug, characterized in that: Includes an outer bushing clamping screw (2), a special-shaped double-ended nut (3), and an inner bushing clamping screw (7). The outer bushing clamping screw (2) is fitted onto the casing tube (1). The right end of the outer bushing clamping screw (2) is connected to sealing ring A (4) and sealing ring B (10), and there is an outer ring (5) between sealing ring A (4) and sealing ring B (10). The outer ring (5) is fitted onto the outside of the casing tube (1). The outer sleeve (5) is located on the right side of the outer sleeve (6). The outer sleeve (6) is fitted outside the casing tube (1), and the right end of the outer sleeve (6) is in contact with the inner bushing clamping screw (7). The sealing ring A (4), sealing ring B (10), outer ring (5), and outer top sleeve (6) are all located between the outer shaft sleeve clamping screw (2) and the irregular double-ended nut (3); The inner bushing clamping screw (7) is installed inside the casing tube (1). Its left end has a sealing ring C (11) and a sealing ring D (12). There is an inner sleeve (8) between the sealing ring C (11) and the sealing ring D (12). The inner sleeve (8) is installed on the inner mandrel (9). The right end of the inner mandrel (9) passes through the irregular double-ended nut (3), while the sealing ring C (11), the sealing ring D (12), and the inner sleeve (8) are located between the inner mandrel (9) and the inner wall of the casing tube (1).

2. The sealing performance testing plug for a detachable sheathed tube according to claim 1, characterized in that: The part where the outer ring (5) contacts the sealing ring A (4) and sealing ring B (10) has a bevel structure.

3. The sealing performance testing plug for a detachable sheathed tube according to claim 2, characterized in that: The outer bushing clamping screw (2) and the irregular double-ended nut (3) have a threaded structure for contact, and at the same time, they are fitted with a bevel structure so that the sealing ring A (4) and sealing ring B (10) press against the outer wall of the casing tube (1).

4. The sealing performance testing plug for a detachable sheathed tube according to claim 1, characterized in that: There is a bevel structure between the inner mandrel (9) and the sealing rings C (11) and D (12). The inner mandrel (9) is connected to the irregular double-ended nut (3) through the nut. With the bevel structure, the sealing rings C (11) and D (12) press against the inner wall of the shell tube (1).

5. The sealing test plug for a detachable sheathed tube according to claim 1, characterized in that: Both ends of the casing tube (1) are sealed using the sealing test plugs of the detachable casing tube.

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