Performance testing device of sealing element for sealing lead-bismuth pile

Abstract

The utility model discloses a performance testing device of a sealing element for sealing a lead-bismuth pile, which relates to the technical field of sealing element detection and comprises a test cylinder and an installation cylinder axially nested in the test cylinder, and a test cavity is formed between the bottom of the installation cylinder and the bottom of the test cylinder. A nesting fit clearance is formed between the outer wall of the mounting cylinder in the axial nesting area and the inner wall of the test cylinder; a sealing piece for blocking the test accommodating cavity is annularly arranged between the outer wall of the mounting cylinder and the inner wall of the test cylinder in the axial nesting area; at least one liquid inlet pipe is connected to the test cylinder on the lower side of the sealing element, the liquid inlet pipe is communicated with the inner wall of the test cylinder, and a measuring instrument of a test medium is connected to the liquid inlet pipe; and at least one liquid outlet pipe is connected to the test cylinder on the upper side of the sealing element, is communicated with the inner wall of the test cylinder, and is connected with a measuring instrument of a test medium. The device is simple in structure, high in test accuracy and capable of effectively evaluating the performance of the sealing element for sealing the lead-bismuth pile.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing component detection, in particular to a performance testing device for sealing a lead-bismuth stack. Background Art

[0002] In the nuclear industry, lead-bismuth reactors are an important technology in the fourth-generation nuclear energy system. They use lead-bismuth alloy as a coolant. The high boiling point and low melting point characteristics of this alloy allow the reactor to operate safely at higher temperatures, thereby improving energy conversion efficiency.

[0003] As the lead-bismuth alloy circulates within the lead-bismuth stack to transfer heat, it flows through joints such as pumps, valves, and pipes. Leakage in these joints not only poses a nuclear safety risk but can also pollute the environment. To address this issue, seals are typically used to ensure the tightness of these joints and prevent contact between the lead-bismuth alloy and the environment. Therefore, the selection of seals is crucial. If poor-performing seals are used, they will not be able to withstand the chemical corrosion of the lead-bismuth alloy and the high temperature environment, resulting in seal failure. Therefore, performance testing of seals is crucial.

[0004] In the prior art, most performance testing devices for seals are designed for water or common gases, as well as hardware for industrial applications. There have been no public reports on performance testing devices for seals used in lead-bismuth stacks. Utility Model Content

[0005] In response to the above-mentioned problem that there has been no public report on the performance testing device for sealing lead-bismuth stacks, the utility model provides a performance testing device for sealing lead-bismuth stacks with simple structure and high accuracy.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] A performance testing device for a seal used in lead-bismuth stacks, the testing device comprising a test tube and a mounting tube axially nested within the test tube, a test cavity formed between the bottoms of the mounting tube and the test tube, and a nesting clearance between the outer wall of the mounting tube and the inner wall of the test tube in the axial nesting region;

[0008] A sealing member for sealing the test cavity is provided circumferentially between the outer wall of the installation cylinder and the inner wall of the test cylinder in the axially overlapping area;

[0009] At least one liquid inlet pipe is connected to the test cylinder on the lower side of the sealing member, the liquid inlet pipe is in communication with the inner wall of the test cylinder, and a measuring instrument for the test medium is connected to the liquid inlet pipe;

[0010] At least one liquid outlet pipe is connected to the test cylinder on the upper side of the sealing member. The liquid outlet pipe is in communication with the inner wall of the test cylinder, and a measuring instrument for the test medium is connected to the liquid outlet pipe.

[0011] The above technical measures form a test chamber by means of a test tube and an installation tube axially stacked inside the test tube. The structure is simple and easy to assemble and disassemble, which is beneficial to improving the efficiency and convenience of the test. By setting a liquid inlet pipe and a liquid outlet pipe and correspondingly setting measuring instruments, accurate detection of the test medium can be achieved, which is beneficial to improving the accuracy of the test and can effectively evaluate the performance of the seal.

[0012] Furthermore, a plurality of liquid inlet pipes are evenly connected along the circumference of the test cylinder on the lower side of the sealing member;

[0013] Correspondingly, a plurality of liquid outlet pipes are evenly connected along the circumference of the test cylinder on the upper side of the sealing member, and each liquid outlet pipe is in a one-to-one corresponding matching relationship with each liquid inlet pipe.

[0014] The above technical measures can reduce errors by arranging a one-to-one correspondence between each liquid outlet pipe and each liquid inlet pipe, which is beneficial to improving the accuracy and reliability of the test.

[0015] Furthermore, the bottom of the test cylinder is a spherical crown head structure;

[0016] Correspondingly, the bottom of the installation cylinder is a spherical crown head structure.

[0017] The above technical measures are beneficial to enhancing stability by setting the bottom of the installation tube and the test tube as a spherical crown head structure, while also guiding the moving direction of the test medium.

[0018] Furthermore, a drainage pipe is connected to the center of the bottom of the test cylinder, and the drainage pipe is connected to the inner wall of the test cylinder;

[0019] The liquid discharge pipe is connected to a measuring instrument for the test medium.

[0020] The above technical measures facilitate post-test cleaning and maintenance by providing a drain pipe, which is beneficial to improving test efficiency. At the same time, by connecting a measuring instrument for the test medium to the drain pipe, the discharge of the test medium can be accurately measured, which is beneficial to improving the accuracy of the sealing performance evaluation.

[0021] Furthermore, the testing device further includes a support frame, which is arranged at the bottom of the test cylinder and supports the test cylinder in suspension.

[0022] The above technical measures ensure that the test tube remains stable during the test by setting up a support frame, which is conducive to reducing errors and enhancing stability.

[0023] Furthermore, the rim of the test tube has a receiving platform 1 folded outward;

[0024] Correspondingly, the edge of the mounting tube has a second receiving platform folded outwards;

[0025] The installation cylinder is axially nested in the test cylinder and is seated on the first receiving platform of the test cylinder via the second receiving platform at the rim.

[0026] The above technical measures simplify the assembly between the installation tube and the test tube through the cooperation of the receiving platform 1 and the receiving platform 2, which is conducive to improving convenience.

[0027] Furthermore, a sealing gasket for sealing an assembly gap is provided between the first receiving platform of the test cylinder and the second receiving platform of the installation cylinder.

[0028] The above technical measures block the assembly gap by arranging a sealing gasket between the receiving platform 1 and the receiving platform 2, which is beneficial to prevent leakage of the test medium and improve the sealing performance.

[0029] Furthermore, the first receiving platform of the test cylinder and the second receiving platform of the installation cylinder have a plurality of groups of bolt holes arranged in a one-to-one corresponding manner along the circumferential direction;

[0030] The installation cylinder axially overlapped in the test cylinder is locked by bolts installed in each group of bolt holes between the second receiving platform and the first receiving platform.

[0031] The above technical measures ensure a stable connection between the installation tube and the test tube by locking the receiving platform 1 and the receiving platform 2 using bolts and bolt holes, which is conducive to improving stability.

[0032] Furthermore, the test medium fed into the test cavity through the liquid inlet pipe is liquid, and the pressure of the test medium is 0.3-0.5 MPa and the temperature is ≥500°C.

[0033] The above technical measures can simulate actual environmental conditions by controlling the pressure and temperature of the test medium, which is beneficial to improving the accuracy of seal performance evaluation.

[0034] One or more technical solutions provided by this utility model have at least the following technical effects or advantages:

[0035] The utility model forms a test chamber by a test cylinder and an installation cylinder axially stacked in the test cylinder. The structure is simple and easy to disassemble and assemble, which is beneficial to improving the efficiency and convenience of the test. By arranging a liquid inlet pipe and a liquid outlet pipe and correspondingly arranging measuring instruments, accurate detection of the test medium is achieved, which is beneficial to improving the accuracy of the test and can effectively evaluate the performance of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of the present invention, and do not constitute a limitation of the embodiments of the present invention;

[0037] Figure 1 This is a schematic structural diagram of a performance testing device for a seal used in a lead-bismuth stack seal in the present invention;

[0038] Figure 2 yes Figure 1 A magnified schematic diagram of point A in the middle;

[0039] Figure 3 This is a schematic diagram of the connection structure between two adjacent ring segments in the present utility model;

[0040] Figure 4 yes Figure 1 A magnified schematic diagram of point B in the middle;

[0041] Figure 5 This is a schematic diagram of the installation structure of the sealing member in one embodiment of the present utility model;

[0042] Among them, 1-installation cylinder; 2-test cylinder; 3-liquid outlet pipe; 4-liquid inlet pipe; 5-sealing part; 6-receiving platform 2; 7-receiving platform 1; 8-liquid discharge pipe; 9-support frame; 10-sealing gasket. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0045] Example 1

[0046] Reference Figure 1-4 This embodiment provides a performance testing device for a seal used in lead-bismuth stacks. The testing device includes a test tube 2 and a mounting tube 1 axially nested within the test tube 2. A test chamber is formed between the bottoms of the mounting tube 1 and the bottoms of the test tube 2. An overlapping clearance is provided between the outer wall of the mounting tube 1 and the inner wall of the test tube 2 in the axially nested region.

[0047] A sealing member 5 for sealing the test cavity is provided circumferentially between the outer wall of the installation cylinder 1 and the inner wall of the test cylinder 2 in the axially overlapping region;

[0048] At least one liquid inlet pipe 4 is connected to the test cylinder 2 on the lower side of the seal 5. The liquid inlet pipe 4 is in communication with the inner wall of the test cylinder 2. A measuring instrument for the test medium is connected to the liquid inlet pipe 4.

[0049] At least one liquid outlet pipe 3 is connected to the test cylinder 2 on the upper side of the sealing member 5 . The liquid outlet pipe 3 is in communication with the inner wall of the test cylinder 2 . A measuring instrument for the test medium is connected to the liquid outlet pipe 3 .

[0050] Four liquid inlet tubes 4 are connected to the test tube 2 below the seal 5, and four liquid outlet tubes 3 are connected to the test tube 2 above the seal 5. The seal 5 comprises three ring segments, and adjacent ring segments can be connected using a tapered fit. This facilitates installation without compromising the performance of the seal 5, and there is no gap between the seal 5 and the mounting tube 1.

[0051] On the test cylinder 2 below the seal 5, multiple liquid inlet pipes 4 are evenly connected along the circumference;

[0052] Correspondingly, a plurality of liquid outlet pipes 3 are evenly connected along the circumference of the test cylinder 2 on the upper side of the sealing member 5 , and each liquid outlet pipe 3 is in a one-to-one corresponding matching relationship with each liquid inlet pipe 4 .

[0053] The bottom of the test tube 2 is a spherical cap-shaped head structure; correspondingly, the bottom of the installation tube 1 is a spherical cap-shaped head structure.

[0054] A drain pipe 8 is connected to the center of the bottom of the test cylinder 2 , and the drain pipe 8 is in communication with the inner wall of the test cylinder 2 ; a measuring instrument for the test medium is connected to the drain pipe 8 .

[0055] The testing device further includes a support frame 9 , which is arranged at the bottom of the test cylinder 2 and supports the test cylinder 2 in suspension.

[0056] The support frame 9 is connected to the bottom of the test tube 2 by welding.

[0057] The rim of the test tube 2 has a receiving platform 7 folded outward;

[0058] Correspondingly, the rim of the mounting tube 1 has a receiving platform 6 folded outwards;

[0059] The installation cylinder 1 is axially nested in the test cylinder 2 and is seated on the receiving platform 1 7 of the test cylinder 2 via the receiving platform 2 6 at the rim.

[0060] The receiving platform 1 7 is connected to the rim of the test tube 2 by welding. The receiving platform 2 6 is connected to the rim of the installation tube 1 by welding.

[0061] A sealing gasket 10 is provided between the receiving platform 1 7 of the test tube 2 and the receiving platform 2 6 of the installation tube 1 to seal the assembly gap.

[0062] The receiving platform 1 7 of the test tube 2 and the receiving platform 2 6 of the installation tube 1 are arranged along the circumferential direction with multiple groups of bolt holes that correspond to each other;

[0063] The mounting tube 1 axially nested in the test tube 2 is locked by bolts inserted into each set of bolt holes between the second receiving platform 6 and the first receiving platform 7 .

[0064] The test medium fed into the test cavity through the liquid inlet pipe 4 is liquid, and the pressure of the test medium is 0.3-0.5 MPa and the temperature is ≥500°C.

[0065] During use, the mounting tube 1 is axially nested within the test tube 2, the receiving platform 1 7 and the receiving platform 2 6 are aligned, and the mounting tube 1 and the test tube 2 are fixed using bolts and bolt holes. After the seal 5 to be tested is installed, liquid lead-bismuth alloy is injected through the liquid inlet pipe 4, and the injection flow rate is recorded using a measuring instrument. The liquid lead-bismuth alloy begins to react within the test tube 2 due to the high temperature and high pressure. Within a preset time period, for example, one hour, the flow rates discharged from the liquid outlet pipe 3 and the flow rates discharged from the liquid drain pipe 8 are measured using a meter to obtain test data on the performance of the seal 5, thereby obtaining a performance evaluation result of the seal 5.

[0066] Example 2

[0067] The rest of this embodiment is the same as that of embodiment 1, except that:

[0068] Reference Figure 5 There is an installation gap between the sealing member 5 and the installation tube 1, and the size of the installation gap is 0.10 mm.

[0069] Example 3

[0070] The rest of this embodiment is the same as that of embodiment 2, except that:

[0071] The installation gap size is 0.15mm.

[0072] Example 4

[0073] The rest of this embodiment is the same as that of embodiment 2, except that:

[0074] The installation gap size is 0.20mm.

[0075] Example 5

[0076] The rest of this embodiment is the same as that of embodiment 2, except that:

[0077] The installation gap size is 0.40mm.

[0078] Example 6

[0079] The rest of this embodiment is the same as that of embodiment 2, except that:

[0080] The installation gap size is 0.60mm.

[0081] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0082] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A performance testing device for a seal used in a lead-bismuth stack, characterized in that: The test device comprises a test cylinder (2) and a mounting cylinder (1) axially nested in the test cylinder (2); a test cavity is formed between the bottom of the mounting cylinder (1) and the bottom of the test cylinder (2); and a nesting fit gap is provided between the outer wall of the mounting cylinder (1) and the inner wall of the test cylinder (2) in the axial nesting area; A sealing member (5) for sealing the test cavity is provided circumferentially between the outer wall of the installation cylinder (1) and the inner wall of the test cylinder (2) in the axially overlapping region; At least one liquid inlet pipe (4) is connected to the test cylinder (2) below the sealing member (5), the liquid inlet pipe (4) is in communication with the inner wall of the test cylinder (2), and a measuring instrument for the test medium is connected to the liquid inlet pipe (4); At least one liquid outlet pipe (3) is connected to the test cylinder (2) on the upper side of the sealing member (5), the liquid outlet pipe (3) is in communication with the inner wall of the test cylinder (2), and a measuring instrument for the test medium is connected to the liquid outlet pipe (3).

2. The performance testing device for the lead-bismuth stack seal according to claim 1, characterized in that: On the test cylinder (2) below the sealing member (5), a plurality of liquid inlet pipes (4) are evenly connected along the circumference; Correspondingly, a plurality of liquid outlet pipes (3) are evenly connected along the circumference of the test cylinder (2) on the upper side of the sealing member (5), and each liquid outlet pipe (3) is in a one-to-one matching relationship with each liquid inlet pipe (4).

3. The performance testing device for the lead-bismuth stack sealing member according to claim 1 or 2, characterized in that: The bottom of the test cylinder (2) is a spherical crown-shaped head structure; Correspondingly, the bottom of the installation cylinder (1) is a spherical crown-shaped head structure.

4. The performance testing device for the lead-bismuth stack sealing member according to claim 3, characterized in that: A drainage pipe (8) is connected to the center of the bottom of the test cylinder (2), and the drainage pipe (8) is in communication with the inner wall of the test cylinder (2); The discharge pipe (8) is connected to a measuring instrument for the test medium.

5. The performance testing device for the seal for sealing a lead-bismuth stack according to claim 1, characterized in that: The testing device further comprises a support frame (9), which is arranged at the bottom of the test cylinder (2) and supports the test cylinder (2) in suspension.

6. The performance testing device for the seal for sealing a lead-bismuth stack according to claim 1 or 5, characterized in that: The rim of the test cylinder (2) has a receiving platform (7) folded outward; Correspondingly, the edge of the mounting tube (1) has a second receiving platform (6) folded outwards; The mounting cylinder (1) is axially nested in the test cylinder (2), and is seated on the first receiving platform (7) of the test cylinder (2) via the second receiving platform (6) at the rim.

7. The performance testing device for the lead-bismuth stack sealing member according to claim 6, characterized in that: A sealing gasket (10) for sealing an assembly gap is provided between the first receiving platform (7) of the test cylinder (2) and the second receiving platform (6) of the installation cylinder (1).

8. The performance testing device for the lead-bismuth stack sealing member according to claim 6, characterized in that: The receiving platform 1 (7) of the test cylinder (2) and the receiving platform 2 (6) of the installation cylinder (1) have a plurality of groups of bolt holes arranged in a one-to-one corresponding manner along the circumferential direction; The mounting cylinder (1) is axially nested in the test cylinder (2) and is locked by bolts inserted into each set of bolt holes between the second receiving platform (6) and the first receiving platform (7).

9. The performance testing device for the lead-bismuth stack sealing member according to claim 1, characterized in that: The test medium fed into the test cavity through the liquid inlet pipe (4) is liquid, and the pressure of the test medium is 0.3-0.5 MPa and the temperature is ≥500°C.

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