A universal sealing test device and use method

Abstract

The present invention provides a universal sealing test device and a method of using the sealing test device, the sealing test device comprising: an upper flange, a lower flange, an external inspection cover and a plurality of connectors, the upper flange and the lower flange are connected up and down by the connectors to form a first sealing space; the upper flange and the external inspection cover are connected up and down by the connectors, and a second sealing space is formed between the upper flange, the lower flange and the external inspection cover; a sealing groove is provided on the butt joint surface of the upper flange and the lower flange, and the sealing part to be tested is provided in the sealing groove. The embodiment of the present invention can detect sealing parts to be tested of different specifications by replacing the specifications of the upper flange and the lower flange, which is not only simple to operate and low in cost, but also has strong versatility.

Description

Technical Field

[0001] The present invention relates to the technical field of seal detection, and in particular to a universal seal test device and a use method thereof. Background Art

[0002] During rocket launch, there are various forms of sealing structures in the launch vehicle tank, pressurized delivery pipeline, engine and other key components, among which the groove-type sealing structure is the most widely used. In order to verify the sealing ability of the sealing ring, the rationality of the torque application and the reliability of the sealing structure, it is necessary to test and verify the seals and sealing structures. However, the existing sealing test devices or tooling are mainly test systems or sealing test tooling for special joints.

[0003] Therefore, there is an urgent need for a universal sealing test device to realize sealing test verification for seals of different specifications. Summary of the invention

[0004] In view of this, an object of an embodiment of the present invention is to provide a universal sealing test device and a method of use, wherein the universal sealing test device can realize sealing test verification for sealing components of different specifications.

[0005] To achieve the above-mentioned purpose, in a first aspect, an embodiment of the present invention provides a universal sealing test device, the sealing test device comprising: an upper flange, a lower flange, an external inspection cover and a plurality of connecting pieces, the upper flange and the lower flange are connected up and down by the connecting pieces to form a first sealed space;

[0006] The upper flange and the external inspection cover are connected up and down through a connecting piece, and a second sealed space is formed between the upper flange, the lower flange and the external inspection cover;

[0007] A sealing groove is arranged on the butt joint surfaces of the upper flange and the lower flange, and the sealing member to be tested is arranged in the sealing groove.

[0008] In some possible implementations, at least two straight-through connectors are provided on the upper flange located at the first sealed space, which are respectively used to fill the first sealed space with a leak detection medium and to perform a sealing test on the seal to be tested;

[0009] At least two straight-through connectors are arranged on the external inspection cover, which are respectively used to fill the second sealed space with a leak detection medium and to perform a sealing test on the seal to be tested.

[0010] In some possible embodiments, a first docking surface is provided on the upper flange, a second docking surface is provided on the lower flange, a groove is provided on the second docking surface, a protrusion matching the groove is provided on the first docking surface, and the sealing groove is formed between the protrusion and the groove.

[0011] In some possible implementations, a sealing gasket is provided at the connection between the upper flange and the external inspection cover.

[0012] In some possible implementations, a pressure plate is provided below the lower flange, and the pressure plate is fixed to the outer bottom surface of the lower flange through the connecting member to prevent the center portion of the lower flange from bulging and deforming when the upper flange and the lower flange are connected.

[0013] In some possible implementations, the sealing test device further includes: a base, and the sealing test device is disposed on the base through the external inspection cover.

[0014] In a second aspect, an embodiment of the present invention provides a method for using a universal sealing test device, the method comprising:

[0015] Step S1, installing the seal to be tested in the sealing groove between the upper flange and the lower flange;

[0016] Step S2, fastening the upper flange to the lower flange and the outer inspection cover respectively through connecting pieces, and applying a torque to the connecting pieces according to the specifications of the seal to be tested;

[0017] Step S3, filling a leak detection medium into a first sealed space formed by the upper flange and the lower flange or a second sealed space formed between the upper flange, the lower flange and the outer inspection cover according to the use condition of the seal to be tested; performing a liquid leakage test on the first sealed space or the second sealed space to ensure that the leakage rate meets the requirements;

[0018] Step S4, after the test is completed, disassemble the connectors on the upper flange, the lower flange and the external inspection cover, and inspect the seal to be tested.

[0019] In some possible implementations, step S2 specifically includes:

[0020] Record the value of the torque loaded on the connecting piece, repeatedly calibrate the torque of the connecting piece according to the preset torque value, and measure the gap between the butt joint surfaces of the upper flange and the lower flange, as well as the gap between the butt joint surfaces of the lower flange and the external inspection cover; use distilled water to perform a hydraulic test on the first sealing space and the second sealing space.

[0021] In some possible implementations, step S3 specifically includes:

[0022] When the operating condition of the seal to be tested is internal pressure, the sealing test device is placed at the test temperature, and the second sealed space is evacuated into a vacuum through the straight-through joint located on the external inspection cover;

[0023] The leak detection medium is filled into the first sealed space through the straight-through joint located on the upper flange. When the first sealed space reaches a specified test pressure and maintains the pressure for a preset time, the straight-through joint located on the external inspection cover is connected to a helium mass spectrometer leak detector or a soap bubble leak detection is performed on the straight-through joint to ensure that the leakage rate meets the requirements.

[0024] In some possible implementations, step S3 specifically includes:

[0025] When the operating condition of the seal to be tested is external pressure, the sealing test device is placed at the test temperature, and the first sealing space is evacuated into a vacuum through the straight-through joint located on the upper flange;

[0026] The leak detection medium is filled into the second sealed space through the straight-through joint located on the external inspection cover. When the second sealed space reaches the specified test pressure and maintains the pressure for a preset time, the straight-through joint located on the upper flange is connected to a helium mass spectrometer leak detector or a soap bubble leak test is performed on the straight-through joint to ensure that the leakage rate meets the requirements.

[0027] The beneficial technical effects of the above technical solution are:

[0028] The embodiment of the present invention provides a universal sealing test device and a method of use, the sealing test device comprising: an upper flange, a lower flange, an external inspection cover and a plurality of connectors, the upper flange and the lower flange are connected up and down by the connectors to form a first sealing space; the upper flange and the external inspection cover are connected up and down by the connectors, and a second sealing space is formed between the upper flange, the lower flange and the external inspection cover; a sealing groove is provided on the butt joint surface of the upper flange and the lower flange, and the seal to be tested is provided in the sealing groove. The embodiment of the present invention can detect seals to be tested of different specifications by replacing the specifications of the upper flange and the lower flange, which is not only simple to operate and low in cost, but also has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of a universal sealing test device according to an embodiment of the present invention;

[0031] Figure 2 yes Figure 1 A partial enlarged view of point C in the middle;

[0032] Figure 3 The present invention is a flowchart of a method for using a universal sealing test device according to an embodiment of the present invention.

[0033] Description of Figure Numbers:

[0034] 1. Upper flange; 11. First docking surface; 12. Protrusion; 2. Lower flange; 21. Second docking surface; 22. Groove; 3. External inspection cover; 4. Connector; 41. Bolt; 42. Flat washer; 43. Spring washer; 44. Nut; 5. Sealing groove; 6. Straight joint; 61. Ball joint; 62. Jacket nut; 63. Plug cap; 7. Sealing gasket; 8. Pressure plate; 9. Base; 10. Lifting ear. DETAILED DESCRIPTION

[0035] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least part of the known structures and technologies are not shown in order to avoid unnecessary ambiguity of the present invention; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0036] Figure 1 is a schematic diagram of the overall structure of a universal sealing test device according to an embodiment of the present invention. Figure 1 As shown, the sealing test device includes: an upper flange 1, a lower flange 2, an external inspection cover 3 and a plurality of connectors 4, wherein the upper flange 1 and the lower flange 2 are connected up and down by the connector 4 to form a first sealing space A; the upper flange 1 and the external inspection cover 3 are connected up and down by the connector 4, and a second sealing space B is formed between the upper flange 1, the lower flange 2 and the external inspection cover 3; a sealing groove 5 is provided on the butt joint surface of the upper flange 1 and the lower flange 2, and the seal to be tested is provided in the sealing groove 5. Specifically, in actual use, the corresponding upper flange 1 and the lower flange 2 can be selected according to the structural form of the seal to be tested to meet the sealing test verification requirements of groove structures such as groove type and tongue type. In addition, the connector 4 can include bolts 41, flat washers 42, spring washers 43 and nuts 44. The embodiment of the present invention can detect seals to be tested (for example, sealing structures and sealing rings) of different specifications by replacing the specifications of the upper flange 1 and the lower flange 2, which is not only simple to operate and low in cost, but also has strong versatility.

[0037] In this embodiment, at least two straight joints 6 are provided on the upper flange 1 located at the first sealed space A, which are respectively used to fill the first sealed space A with a leak detection medium and to perform a seal test on the seal to be tested; at least two straight joints 6 are provided on the external inspection cover 3, which are respectively used to fill the second sealed space B with a leak detection medium and to perform a seal test on the seal to be tested. Specifically, the straight joint 6 includes: a ball joint 61, a sleeve nut 62 and a plug cap 63, wherein the ball joint 61 is provided at the top end inside the sleeve nut 62, and the plug cap 63 is sleeved at the top end outside the sleeve nut 62. The straight joint 6 is welded on the upper flange 1 and the external inspection cover 3 respectively. The number of the straight joints 6 on the upper flange 1 and the external inspection cover 3 is at least two. One straight joint 6 is used as an inflation port for filling the leak detection medium, and one straight joint 6 is used as a detection port for detecting the leakage rate of the first sealed space A and the second sealed space B. In addition, in order to ensure the reliability of the sealing test device, the welds between the straight joint 6 and the upper flange 1 and the external inspection cover 3 should be subjected to 100% radiographic inspection, and the qualified level is Level I. Welding defects such as pores and inclusions are not allowed.

[0038] Figure 2 yes Figure 1 The local enlarged view of point C in the middle is as follows: Figure 2 As shown, in addition, in this embodiment, the upper flange 1 is provided with a first docking surface 11, the lower flange 2 is provided with a second docking surface 21, the second docking surface 21 is provided with a groove 22, the first docking surface 11 is provided with a protrusion 12 matching the groove 22, and a sealing groove 5 is formed between the protrusion 12 and the groove 22. Specifically, for seals to be tested of different specifications, a sealing groove 5 matching the structural shape of the seal to be tested can be machined on the first docking surface 11 and the second docking surface 21, which is used to detect seals to be tested of different specifications. This embodiment is simple to operate, low in cost, and highly versatile.

[0039] like Figure 1 As shown, in some embodiments, a sealing gasket 7 is provided at the connection between the upper flange 1 and the external inspection cover 3. The sealing gasket 7 in this embodiment can be made of a fluororubber plate or a silicone rubber plate according to experimental needs. The sealing gasket 7 can ensure the sealing performance of the upper flange 1 and the external inspection cover 3. If the seal of the seal to be tested leaks, the leaked helium or nitrogen is in the external inspection cover 3, which can protect the experimental operator and avoid the danger of breathing difficulties.

[0040] like Figure 1As shown, in some embodiments, a pressure plate 8 is provided below the lower flange 2, and the pressure plate 8 is fixed to the outer bottom surface of the lower flange 2 through the connecting member 4 to prevent the central part of the lower flange 2 from bulging and deforming when the upper flange 1 is connected to the lower flange 2. Specifically, when the rigidity of the lower flange 2 is poor, it can be prevented that when the connecting member 4 applies a torque, the central part of the lower flange 2 is bulged and deformed due to a large edge torque.

[0041] like Figure 1 As shown, in some embodiments, the sealing test device may further include: a base 9, and the sealing test device is arranged on the base 9 through the external inspection cover 3. Specifically, during the test, if there is no base 9, workers are likely to hit their feet or press their hands during each handling and transfer, and the overall height is too low, which is inconvenient to operate. Therefore, in order to facilitate operation, a universal base 9 is provided in this embodiment, and the sealing test device is placed on the base 9 during each test. In addition, in order to facilitate hoisting, a lifting lug 10 is also provided in this embodiment.

[0042] The universal sealing test device of the embodiment of the present invention can complete the high and low temperature sealing test verification in the range of -250℃ to 500℃ according to the use conditions of the seal to be tested. In particular, when the use condition of the seal to be tested is a low temperature environment, it is necessary to first test the sealing performance of the straight-through joint 6 at a test temperature slightly lower than the use condition, and strictly ensure that the leakage rate requirement of each connection part of the straight-through joint 6 at the test temperature is not greater than 1×10 -7 Pa·m 3 / s.

[0043] Figure 3 is a flow chart of a method for using a universal sealing test device according to an embodiment of the present invention. Figure 2 As shown, the method of use includes the following steps:

[0044] Step S1, installing the seal to be tested in the sealing groove 5 between the upper flange 1 and the lower flange 2;

[0045] Step S2, fastening the upper flange 1 to the lower flange 2 and the outer inspection cover 3 respectively through the connecting piece 4, and applying a torque to the connecting piece 4 according to the specification of the seal to be tested;

[0046] Step S3, according to the use condition of the seal to be tested, the first sealed space A formed by the upper flange 1 and the lower flange 2 or the second sealed space B formed by the upper flange 1, the lower flange 2 and the outer inspection cover 3 is filled with a leak detection medium; the first sealed space A or the second sealed space B is tested for liquid leakage to ensure that the leakage rate meets the requirements;

[0047] Step S4, after the test is completed, the upper flange 1 and the lower flange 2 and the connector 4 on the external inspection cover 3 are disassembled to inspect the seal to be tested.

[0048] Specifically, after the seal to be tested is installed in the sealing groove 5 between the upper flange 1 and the lower flange 2, the butt joint surfaces of the upper flange 1 and the lower flange 2 are first fixedly connected by the connecting piece 4, and then the butt joint surfaces of the upper flange 1 and the external inspection cover 3 are fixedly connected by another connecting piece 4.

[0049] During the connection process, the gap between the first butt joint surface 11 of the upper flange 1 and the second butt joint surface of the lower flange 2 is kept basically the same, that is, the gaps between the various parts of the flange surface where the upper flange 1 contacts the lower flange 2 are basically the same. Insert the bolts 41 into the upper flange 1 and the lower flange 2, and install the flat washers 42, spring washers 43 and nuts 44, tighten them evenly and symmetrically in the circumferential direction, and measure with a feeler gauge to keep the gaps between the butt joint surfaces of the upper flange 1 and the lower flange 2 consistent. Confirm that all bolts 41 have been tightened, load the torque according to the specifications of the seal to be tested, and record the loading torque values ​​on the bolts 41 and nuts 44. After the first loading of the torque is completed, the stress will be released after a period of time, and a part of it will be released by itself, resulting in a decrease in the torque, so correction is required, that is, the torque of the connector 4 is repeatedly corrected according to the preset torque value. The number of corrections can be determined according to the actual situation. In this embodiment, corrections are performed three times, and the gap between the butt joint surfaces of the upper flange 1 and the lower flange 2 is measured.

[0050] After a period of time (e.g. 8 hours), the circumferential direction of the joint surface of the upper flange 1 and the lower flange 2 is corrected with the recorded final torque until the nut 44 stops rotating. In addition, the leakage caused by the failure of the seal has a process. For example, after 15 minutes of pressure, it can be hydraulically tested with distilled water. After the hydraulic test, if the gap does not change, it is considered that the applied torque is reasonable, the flatness is qualified, and the strength and rigidity of the sealing surface are sufficient, then the leakage rate is qualified and the sealing is effective.

[0051] Similarly, the method used when connecting the upper flange 1 and the external inspection cover 3 is the same as the method used when connecting the upper flange 1 and the lower flange 2, and will not be repeated here.

[0052] In this embodiment, when the operating condition of the seal to be tested is internal pressure, the sealing experimental device is placed at the test temperature, and the first sealed space A is evacuated into a vacuum through the straight joint 6 located on the upper flange 1; the leak detection medium is filled into the first sealed space A through the straight joint 6 located on the upper flange 1. When the first sealed space A reaches the specified test pressure and maintains the pressure for a preset time, the straight joint 6 located on the external inspection cover 3 is connected to the helium mass spectrometer leak detector or the straight joint 6 is subjected to soap bubble leak detection to ensure that the leakage rate meets the requirements.

[0053] Specifically, when the operating condition of the seal to be tested is internal pressure, the sealing test device described in the test invention is placed at the test temperature, and the leak detection medium is filled into the first sealed space A of the sealing test fixture through the straight-through joint 6 located on the upper flange 1 (under high temperature and normal temperature conditions, the leak detection medium is preferably air, nitrogen, and helium; under low temperature conditions, the leak detection medium is preferably nitrogen and helium). The chamber between the external inspection cover 3 and the upper flange 1 and the lower flange 2 (i.e., the second sealed space B) is a vacuum environment. According to the principle of graded loading, the pressure should rise slowly, and maintain the pressure for 15 minutes after reaching the specified test pressure. The straight-through joint 6 located on the external inspection cover 3 is connected to the helium mass spectrometer leak detector or a soap bubble leak detection is performed on this position to ensure that the leakage rate meets the requirements.

[0054] When the operating condition of the seal to be tested is external pressure, the sealing experimental device is placed at the test temperature, the second sealing space B is evacuated into a vacuum through the straight-through joint 6 located on the external inspection cover 3, and then the leak detection medium is filled into the second sealing space B. According to the principle of graded loading torque, when the second sealing space A reaches the specified test pressure and maintains the pressure for a preset time, the straight-through joint 6 located on the upper flange 1 is connected to the helium mass spectrometer leak detector or the straight-through joint 6 is subjected to soap bubble leak detection to ensure that the leakage rate meets the requirements.

[0055] Specifically, when the operating condition of the seal 19 to be tested is external pressure, the sealing experimental device described in the embodiment of the test present invention is placed under the test temperature, and the leak detection medium (air, nitrogen, and helium are preferably used under high temperature and normal temperature conditions, and nitrogen and helium are preferably used under low temperature conditions) is filled into the sealing test tooling through the straight-through joint 6 located on the external inspection cover 3. The chamber (first sealed space) between the upper flange 1 and the lower flange 2 is a vacuum environment. According to the principle of graded loading, the pressure should rise slowly, and the pressure should be maintained for 15 minutes after reaching the specified test pressure. The straight-through joint 6 located on the upper flange 1 is connected to a helium mass spectrometer leak detector or a soap bubble leak detection is performed on this position to ensure that the leakage rate meets the requirements.

[0056] In this embodiment, the operating condition refers to the occasion in which the seal to be tested is used when it is officially used. For example, "the operating condition is internal pressure" means that the seal to be tested is used for structural sealing with internal pressure. Similarly, when the operating condition is external pressure, it means that the seal to be tested is used for structural sealing with no internal pressure.

[0057] After the test, unload the pressure, disassemble the test piece, and check whether the seal to be tested has damage or scratches. Under the above medium and pressure, if the seal to be tested is a metal seal ring, the leakage rate is guaranteed to be no more than 1×10 -6 Pa·m 3 / s; when the seal to be tested is a rubber seal ring, the leakage rate is guaranteed to be no greater than 1×10 -5 Pa·m 3 / s.

[0058] The method for using a universal sealing test device provided in an embodiment of the present invention can realize sealing test verification for seals of different specifications by only replacing the upper flange 1 and the lower flange 2, and has simple operation, low cost and strong versatility.

[0059] In the description of the embodiments of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed, connected, connected" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for using a universal sealing test device, characterized in that: The method of use is applied to a universal sealing test device, which comprises: an upper flange (1), a lower flange (2), an external inspection cover (3) and a plurality of connecting pieces (4), wherein the upper flange (1) and the lower flange (2) are connected vertically by the connecting pieces (4) to form a first sealed space (A); the upper flange (1) and the external inspection cover (3) are connected vertically by the connecting pieces (4), and a second sealed space (B) is formed between the upper flange (1), the lower flange (2) and the external inspection cover (3); A sealing groove (5) is provided on the butt joint surface of the upper flange (1) and the lower flange (2), and the seal to be tested is arranged in the sealing groove (5); at least two straight joints (6) are provided on the upper flange (1) located at the first sealed space (A), respectively used for filling the first sealed space (A) with a leak detection medium and performing a sealing test on the seal to be tested; at least two straight joints (6) are provided on the outer inspection cover (3), respectively used for filling the second sealed space (B) with a leak detection medium and performing a sealing test on the seal to be tested; a first butt joint surface (11) is provided on the upper flange (1), a second butt joint surface (21) is provided on the lower flange (2), a groove (22) is provided on the second butt joint surface (21), a protrusion (12) matching the groove (22) is provided on the first butt joint surface (11), and the sealing groove (5) is formed between the protrusion (12) and the groove (22); The method of use includes: Step S1, installing the seal to be tested in the sealing groove (5) between the upper flange (1) and the lower flange (2); Step S2, fastening the upper flange (1) to the lower flange (2) and the outer inspection cover (3) respectively through the connecting piece (4), loading the connecting piece (4) with a torque according to the specification of the seal to be tested; and performing a hydraulic test on the first sealing space (A) and the second sealing space (B) using distilled water; Step S3, filling the first sealed space (A) or the second sealed space (B) with a leak detection medium according to the use condition of the seal to be tested; performing a liquid leakage test on the first sealed space (A) or the second sealed space (B) to ensure that the leakage rate meets the requirements; wherein, When the operating condition of the seal to be tested is internal pressure, the sealing test device is placed at the test temperature, and the second sealed space (B) is evacuated into a vacuum through the straight-through joint (6) located on the external inspection cover (3); the first sealed space (A) is filled with a leak detection medium through the straight-through joint (6) located on the upper flange (1); when the first sealed space (A) reaches a specified test pressure and is maintained at the pressure for a preset time, the straight-through joint (6) located on the external inspection cover (3) is connected to a helium mass spectrometer leak detector or a soap bubble leak detection is performed on the straight-through joint (6) to ensure that the leakage rate meets the requirements; When the operating condition of the seal to be tested is external pressure, the sealing test device is placed at the test temperature, and the first sealing space (A) is evacuated into a vacuum through the straight-through joint (6) located on the upper flange (1); the second sealing space (B) is filled with a leak detection medium through the straight-through joint (6) located on the external inspection cover (3); when the second sealing space (B) reaches a specified test pressure and is maintained at the pressure for a preset time, the straight-through joint (6) located on the upper flange (1) is connected to a helium mass spectrometer leak detector or a soap bubble leak detection is performed on the straight-through joint (6) to ensure that the leakage rate meets the requirements; Step S4, after the test is completed, the upper flange (1) and the lower flange (2) and the connecting piece (4) on the external inspection cover (3) are disassembled to inspect the seal to be tested.

2. The method for using a universal sealing test device according to claim 1, characterized in that: The step S2 specifically includes: The value of the torque loaded on the connecting member (4) is recorded, the torque of the connecting member (4) is repeatedly calibrated according to the preset torque value, and the gap between the butt joint surface between the upper flange (1) and the lower flange (2), and the gap between the butt joint surface between the lower flange (2) and the external inspection cover (3) are measured.

3. The method for using the universal sealing test device according to claim 1, characterized in that: A sealing gasket (7) is provided at the connection between the upper flange (1) and the external inspection cover (3).

4. The method for using the universal sealing test device according to claim 1, characterized in that: A pressure plate (8) is provided below the lower flange (2), and the pressure plate (8) is fixed to the outer bottom surface of the lower flange (2) via the connecting member (4).

5. The method for using the universal sealing test device according to claim 1, characterized in that: The external inspection cover (3) is arranged on a base (9).

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