Tool for testing welding sealing performance of water pipe and flange

Abstract

The utility model relates to the technical field of sealing testing, and discloses a tool for testing the welding sealing performance of a water pipe and a flange, the tool comprises a first shell and a second shell, the second shell is detachably installed on the first shell, the second shell and the first shell define a testing cavity, and the first shell is detachably installed on the first shell. The first shell is provided with a first through hole, the first through hole penetrates through the first shell in the thickness direction of the first shell, and the first through hole is suitable for being plugged by a flange installed in the test cavity. The technical problem that the welding sealing performance of the flange and the water pipe of the molecular pump is difficult to test is solved.

Description

Technical Field

[0001] The present application relates to the technical field of sealing testing, and in particular to a tool for testing the sealing performance of welding of water pipes and flanges. Background Art

[0002] With the maturity and development of magnetic levitation motor technology, magnetic levitation motors are increasingly being used in molecular pumps. The heat generated during operation necessitates cooling the motors by running water pipes inside them. These pipes are welded to sealing flanges, allowing coolant to flow into the molecular pumps. However, prior art has made it difficult to perform leak-tightness testing on the welded joints between the sealing flanges and the water pipes. Utility Model Content

[0003] The present application provides a method for testing the sealing performance of welding between a water pipe and a flange, which solves the technical problem of difficulty in testing the sealing performance of welding between the flange and the water pipe of a molecular pump.

[0004] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0005] An embodiment of the present application provides a tool for testing the welding sealing of a water pipe and a flange. The tool includes a first shell and a second shell. The second shell is detachably mounted on the first shell. The second shell and the first shell define a test chamber. A first through hole is provided on the first shell. The first through hole passes through the first shell along the thickness direction of the first shell. The first through hole is suitable for being sealed by a flange mounted on the test chamber.

[0006] The tooling for testing the sealing performance of welding between water pipes and flanges proposed in an embodiment of the present application has a first through hole penetrating the first shell along the thickness direction of the first shell. The first through hole is suitable for being sealed by a flange installed in a test chamber. The tooling can detect the sealing performance of the flange and the interface where the flange is connected or welded to the water pipe, and at the same time can improve the detection accuracy of the sealing performance of the welding between the flange and the water pipe.

[0007] Optionally, there are multiple first through holes, and the inner diameters of the multiple first through holes are different, and / or the cross-sectional shapes of the multiple first through holes are different.

[0008] The inner diameters of the multiple first through holes are different, and / or the cross-sectional shapes of the multiple first through holes are different, so that multiple flanges of different types or sizes can be installed on the same tool at the same time, so that multiple or different types of flanges can seal the first through holes, and then the assemblies of different types of flanges and water pipes can be tested at the same time, which expands the scope of use of the tool and improves the detection efficiency of the sealing of the flange and water pipe welding.

[0009] Optionally, the first housing has a first side surface facing the test chamber, and a first sealing member is provided in an area of the first side surface surrounding the first through hole, and the first sealing member is suitable for cooperating with the flange.

[0010] A first seal is provided in the area surrounding the first through hole on the first side surface. The first seal is suitable for cooperating with the flange and can test the sealing between the flange and the first seal or the flange, thereby improving the efficiency and accuracy of the tooling sealing test.

[0011] Optionally, a first groove is provided on the first side surface, the first groove surrounds the first through hole, and the first sealing member is provided in the first groove.

[0012] The first seal is arranged in the first groove, which enables the first seal to fit better with the flange, thereby enhancing the sealing between the flange and the first shell, reducing the probability of leakage between the flange and the first shell, and improving the accuracy of the flange and water pipe welding sealing test.

[0013] Optionally, a second through hole is further provided on the first shell, and the second through hole passes through the first shell along the thickness direction of the first shell, and the second through hole is used to connect to the vacuum pump.

[0014] The second through hole passes through the first shell and is used to connect to the vacuum pump, so that the test chamber is closer to the internal environment of the molecular pump, thereby improving the accuracy and reliability of the test results.

[0015] Optionally, the first shell is constructed as a plate-like structure, and the second shell includes a bottom wall and a peripheral wall, the peripheral wall is connected to the outer periphery of the bottom wall and extends toward the first shell, and one end of the peripheral wall away from the bottom wall is connected to the first shell.

[0016] One end of the peripheral wall away from the bottom wall is connected to the first shell, which can effectively utilize the test chamber defined by the first shell and the second shell, expand the volume of the test chamber, and simultaneously meet the sealing test of assemblies formed by flanges and water pipes of various types or sizes, thereby improving the detection efficiency of the sealing of the welding between the flange and the water pipe.

[0017] Optionally, a second sealing member is provided between an end of the peripheral wall away from the bottom wall and the first shell.

[0018] A second sealing member is provided between the end of the peripheral wall away from the bottom wall and the first shell, which can enhance the sealing performance inside the test chamber and improve the accuracy and reliability of the tool sealing test.

[0019] Optionally, a second groove is provided at one of the first shell and the end of the peripheral wall away from the bottom wall, and the second sealing member is provided in the second groove.

[0020] A second groove is provided at one of the ends of the first shell and the peripheral wall away from the bottom wall, and the second seal is provided in the second groove, which can enable the second seal to fit better with the first shell and the second shell, thereby strengthening the sealing between the second shell and the first shell, reducing the probability of leakage between the second shell and the first shell, and improving the accuracy of the flange and water pipe sealing test.

[0021] Optionally, the first shell is provided with a plurality of first mounting holes, the plurality of first mounting holes surround the first through hole, and the plurality of first mounting holes are used for the plurality of first fasteners to pass through so that the first fasteners cooperate with the flange.

[0022] Multiple first mounting holes are provided for multiple first fasteners to pass through so that the first fasteners can cooperate with the flange. On the one hand, this can increase the force points and force area between the flange and the first shell, reduce single-point force conditions, reduce the risk of stress concentration between the flange and the first shell, and improve the stability and reliability of the tooling. This can ensure the accuracy of the sealing test of the flange and the water pipe, and on the other hand, it can also enhance the stability of the connection between the first shell and the flange.

[0023] Optionally, the first shell and the second shell are fixedly connected by a plurality of second fasteners.

[0024] The first shell and the second shell are fixedly connected by multiple second fasteners. On the one hand, this can increase the force points and force area between the first shell and the second shell, reduce single-point force conditions, reduce the risk of stress concentration between the second shell and the first shell, and improve the stability and reliability of tooling use, thereby ensuring the accuracy of flange and water pipe sealing tests. On the other hand, it can also enhance the stability of the connection between the first shell and the second shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A schematic diagram of the structure of the tooling provided in the embodiment of the present application;

[0027] Figure 2 A first housing is shown;

[0028] Figure 3 for Figure 2 A top view of

[0029] Figure 4 for Figure 2Bottom view of

[0030] Figure 5 for Figure 2 Side view of

[0031] Figure 6 A first groove and a second groove are shown;

[0032] Figure 7 for Figure 6 Top view of .

[0033] [Description of Reference Numerals]

[0034] Tool 100; first shell 110; first through hole 111; second through hole 112; second shell 120; bottom wall 121; peripheral wall 122; test chamber 130; first side surface 150; first groove 151; first mounting hole 160; water pipe 170; flange 180; second mounting hole 190; second groove 200. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0037] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0039] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0040] The term "multiple" in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0041] In some embodiments, the flange may be a single sealing flange, or may be a single sealing flange welded to a water pipe.

[0042] With the maturity and development of magnetic levitation motor technology, magnetic levitation motors are more and more widely used in molecular pumps. The magnetic levitation motor generates heat during operation, so it is necessary to pass water pipes inside the magnetic levitation motor to cool the magnetic levitation motor.

[0043] The water pipe is welded to the sealing flange, allowing the coolant to flow into the molecular pump. Magnetic levitation molecular pumps have very high vacuum sealing requirements. Therefore, if a cooling water pipe is installed in the molecular pump cavity, the sealing of the cooling water pipe must be very strict. For example, the sealing of the welding between the water pipe and the flange, as well as the sealing of the flange and other parts of the molecular pump, must be carried out. If the sealing is not tested in advance, the stability and reliability of the overall operation of the molecular pump cannot be guaranteed.

[0044] However, in the related art, there is no tooling for testing the sealing performance of the water pipe welding flange, making it difficult to perform a sealing performance test on the sealing flange of the molecular pump and the water pipe.

[0045] In view of this, in order to improve the efficiency of the sealing detection of the sealing flange and the water pipe of the molecular pump, while ensuring the stability and reliability of the operation of the molecular pump, some embodiments of the present application provide a tool for testing the welding sealing of the water pipe and the flange, the tool comprising a first shell and a second shell.

[0046] The second shell is detachably mounted on the first shell, and the second shell and the first shell define a test chamber, wherein a first through hole is provided on the first shell, and the first through hole passes through the first shell along the thickness direction of the first shell, and the first through hole is suitable for being sealed by a flange mounted on the test chamber.

[0047] In the above scheme, the first through hole passes through the first shell, and the test chamber defined by the first shell and the second shell can be connected to the outside world. The first through hole is suitable for being sealed by the flange installed in the test chamber, and can test the sealing of the flange and the sealing of the welding between the flange and the water pipe, and at the same time can improve the detection accuracy of the sealing of the welding between the flange and the water pipe.

[0048] For the convenience of description, the following embodiments are described by taking a tool for testing the welding sealing of a water pipe and a flange according to an embodiment of the present application as an example.

[0049] Please refer to Figures 1 to 7 , Figure 1 A schematic structural diagram of the tool 100 provided in an embodiment of the present application; Figure 2 A first housing 110 is shown; Figure 3 for Figure 2 A top view of Figure 4 for Figure 2 Bottom view of Figure 5 for Figure 2 Side view of Figure 6 A first groove 151 and a second groove 200 are shown; Figure 7 for Figure 6 Top view of .

[0050] In an embodiment of the present application, a tool 100 for testing the welding sealing of a water pipe 170 and a flange 180 includes a first shell 110 and a second shell 120. The second shell 120 is detachably mounted on the first shell 110. The second shell 120 and the first shell 110 define a test chamber 130, wherein a first through hole 111 is provided on the first shell 110. The first through hole 111 passes through the first shell 110 along the thickness direction of the first shell 110. The first through hole 111 is suitable for being blocked by the flange 180 mounted on the test chamber 130.

[0051] The first shell 110 and the second shell 120 define a test chamber 130. Specifically, the test chamber 130 is disposed between the first shell 110 and the second shell 120. For example, when testing the sealing performance of the water pipe 170 and the flange 180, the test chamber 130 is in a vacuum state. A first through-hole 111 is provided in the first shell 110. The first through-hole 111 extends through the thickness of the first shell 110. Specifically, when not sealed by the flange 180, the test chamber 130 is open to the outside world and is in a non-vacuum state. The first through hole 111 is suitable for being sealed by the flange 180 installed in the test chamber 130. During the sealing test of the flange 180, the first shell 110 and the second shell 120 are disassembled and separated, and then the flange 180 is installed to seal the first through hole 111. At this time, the test chamber 130 is evacuated. When the test chamber 130 is close to a vacuum state, a test gas is sprayed from the side of the first shell 110 away from the test chamber 130 to the flange 180 to test the sealing of the flange 180. If the sealing of the test flange 180 is good, the flange 180 is further replaced with a flange 180 welded with a water pipe 170. The assembly of the flange 180 welded with the water pipe 170 is subjected to a welding sealing test in the same manner as above. The first shell 110 and the second shell 120 are detachably connected, which greatly improves the installation efficiency of the flange 180 on the first shell 110. Moreover, when the tooling 100 needs to be updated or maintained, its components or parts can be easily removed or reinstalled, which makes daily maintenance, inspection, repair, updating and replacement of faulty parts simpler and faster, greatly reducing the time and cost required for maintenance and updating.

[0052] In some embodiments, the detection gas may be helium.

[0053] In some embodiments, a hole structure is provided on the flange 180 , the water pipe 170 extends into the interior of the flange 180 and communicates with the first through hole 111 , and the water pipe 170 and the flange 180 are connected by welding.

[0054] Specifically, a first through hole 111 is provided on the first shell 110. The first through hole 111 passes through the first shell 110 along the thickness direction of the first shell 110. The first through hole 111 is suitable for being sealed by the flange 180 installed in the test chamber 130. The sealing performance of the flange 180 and the interface where the flange 180 is connected or welded to the water pipe 170 can be detected, and the detection accuracy of the sealing performance of the welding between the flange 180 and the water pipe 170 can be improved.

[0055] Please refer to Figures 1 to 7In some embodiments of the present application, there are multiple first through holes 111 , the inner diameters of the multiple first through holes 111 are different, and / or the cross-sectional shapes of the multiple first through holes 111 are different.

[0056] There can be multiple first through holes 111, that is, multiple first through holes 111 can correspond to multiple flanges 180 respectively, and the inner diameters of the first through holes 111 are different, and the sizes or models of the corresponding flanges 180 can also be different, and / or the shapes of the cross sections of the multiple first through holes 111 are different. In this way, multiple flanges 180 of different types or sizes can be installed on the same tool 100 at the same time, so that multiple or different types of flanges 180 can block the first through holes 111, and then the assemblies of different types of flanges 180 and water pipes 170 welded together can be inspected at the same time, which expands the scope of use of the tooling and improves the inspection accuracy of the sealing of the welding between the flanges 180 and the water pipes 170.

[0057] In some embodiments of the present application, the tool 100 further includes a sealing plate (not shown) for sealing the first through-holes 111. When only a portion of the plurality of first through-holes 111 are blocked by the flange 180 to be tested, the sealing plate can be used to block the remaining first through-holes 111, thereby preventing external gas used for testing from entering the test chamber 130 through the first through-holes 111. Alternatively, there is only one type of flange 180 to be tested. Therefore, when testing this type of flange 180, the first through-holes 111 that cooperate with other different types of flanges 180 can be blocked with the sealing plate, thereby preventing external gas used for testing from entering the test chamber 130 through the first through-holes 111, thereby improving the detection accuracy of the tool 100.

[0058] In some embodiments, the number of the first through holes 111 may be four, so that sealing tests can be performed on welding points between various types of flanges 180 and water pipes 170 .

[0059] In some embodiments, the cross-sectional shape of the first through hole 111 may be set to be circular, rectangular, or other polygonal, and the cross-sectional shape of the first through hole 111 may correspond to the cross-sectional shape of the flange 180 .

[0060] Please refer to Figures 1 to 7 In this embodiment, the first shell 110 has a first side surface 150 facing the test chamber 130 . A first seal is provided in the area of the first side surface 150 surrounding the first through hole 111 . The first seal is adapted to cooperate with the flange 180 .

[0061] Because the magnetic levitation molecular pump has high requirements for internal vacuum, a sealing ring is installed at the connection between the flange 180 and other internal structures of the molecular pump to further enhance the sealing of the molecular pump. The first housing 110 has a first side 150 facing the test chamber 130. In other words, the first side 150 is in direct contact with the test chamber 130. The area of the first side 150 surrounding the first through hole 111 is provided with a first seal. The first seal is disposed within the test chamber 130 and is adapted to cooperate with the flange 180. The flange 180 and the first side 150 squeeze the first seal. This allows the weld seal between the flange 180 and the first seal to be tested.

[0062] Specifically, a first seal is provided in the area surrounding the first through hole 111 of the first side surface 150. The first seal is suitable for cooperating with the flange 180 and can test the sealing between the flange 180 and the first seal or the flange 180, thereby improving the sealing test efficiency and accuracy of the tooling 100.

[0063] Please refer to Figures 1 to 7 In this embodiment, the first side surface 150 is provided with a first groove 151 , the first groove 151 surrounds the first through hole 111 , and the first sealing member is provided in the first groove 151 .

[0064] The first seal is positioned within first groove 151, enabling a better fit between the first seal and flange 180. This enhances the seal between flange 180 and first housing 110, reduces the likelihood of leakage between flange 180 and first housing 110, and improves the accuracy of the seal test between flange 180 and water pipe 170. Furthermore, first groove 151 provides a stable installation environment for the first seal, helping to reduce seal failures caused by unstable installation. Positioning the first seal within first groove 151 reduces stress on the first seal, reducing damage to the first seal due to stress concentration, thereby extending its service life.

[0065] Please refer to Figures 1 to 7 In this embodiment, a second through hole 112 is further provided on the first shell 110. The second through hole 112 passes through the first shell 110 along the thickness direction of the first shell 110. The second through hole 112 is used to connect to the vacuum pump.

[0066] The second through hole 112 is connected to a vacuum pump, that is, the vacuum pump can be connected to the test chamber 130. During the process of using the tooling 100 to perform a sealing test on the water pipe 170 and the flange 180, the vacuum pump can be used to suck the test chamber 130 into a vacuum state, making it easier for the test gas to be detected after entering the test chamber 130, thereby improving the accuracy and reliability of the test results.

[0067] In some embodiments, a KF40 connector may be provided on the second through hole 112 , and the KF40 connector is connected to a helium leak detector. After the helium leak detector is working, the test chamber 130 may be evacuated to form a vacuum chamber, and then helium may be sprayed to the welding connection between the flange 180 and the water pipe 170 using a helium tank.

[0068] Please refer to Figures 1 to 7 In this embodiment, the first shell 110 is constructed as a plate-like structure, and the second shell 120 includes a bottom wall 121 and a peripheral wall 122. The peripheral wall 122 is connected to the outer periphery of the bottom wall 121 and extends toward the first shell 110. The end of the peripheral wall 122 away from the bottom wall 121 is connected to the first shell 110.

[0069] One end of the peripheral wall 122 away from the bottom wall 121 is connected to the first shell 110, which can effectively utilize the test chamber 130 defined by the first shell 110 and the second shell 120, expand the volume of the test chamber 130, and can simultaneously meet the sealing test of the assembly formed by flanges 180 and water pipes 170 of various types or sizes, thereby expanding the scope of use of the tooling and improving the efficiency of testing the sealing of the flange and water pipe welding.

[0070] Please refer to Figures 1 to 7 In this embodiment, a second sealing member is provided between the first shell 110 and one end of the peripheral wall 122 away from the bottom wall 121 .

[0071] A second sealing member is provided between the first housing 110 and one end of the peripheral wall 122 away from the bottom wall 121 , which can enhance the sealing performance inside the test chamber 130 and improve the accuracy and reliability of the sealing performance test of the tool 100 .

[0072] Please refer to Figures 1 to 7 In this embodiment, a second groove 200 is provided at one of the first shell 110 and the end of the peripheral wall 122 away from the bottom wall 121 , and the second sealing member is provided in the second groove 200 .

[0073] A second groove 200 is provided between the first housing 110 and one end of the peripheral wall 122 away from the bottom wall 121. The second seal is disposed within the second groove 200, allowing the second seal to better fit within the first and second housings 110, 120. This strengthens the seal between the second housing 120 and the first housing 110, reduces the likelihood of leakage between the second housing 120 and the first housing 110, and improves the accuracy of the seal test between the flange 180 and the water pipe 170. Furthermore, the second groove 200 provides a stable installation environment for the second seal, helping to reduce seal failures caused by unstable installation. Placing the second seal within the second groove 200 reduces stress on the second seal, reducing damage to the second seal due to stress concentration, thereby extending its service life.

[0074] Please refer to Figures 1 to 7 In this embodiment, the first shell 110 is provided with a plurality of first mounting holes 160 , which surround the first through hole 111 , and the plurality of first mounting holes 160 are provided for the passage of a plurality of first fasteners so as to enable the first fasteners to cooperate with the flange 180 .

[0075] Multiple first mounting holes 160 are provided for multiple first fasteners to pass through so that the first fasteners can cooperate with the flange 180. On the one hand, this can increase the force points and force area between the flange 180 and the first shell 110, reduce single-point force conditions, and reduce the risk of stress concentration between the flange 180 and the first shell 110, thereby improving the stability and reliability of the use of the tooling 100, thereby ensuring the accuracy of the welding sealing test of the flange 180 and the water pipe 170, and on the other hand, can also enhance the stability of the connection between the first shell 110 and the flange 180.

[0076] Please refer to Figures 1 to 7 In this embodiment, the first shell 110 and the second shell 120 are fixedly connected by a plurality of second fasteners.

[0077] The first shell 110 and the second shell 120 are fixedly connected by multiple second fasteners. On the one hand, this can increase the force points and force area between the first shell 110 and the second shell 120, reduce single-point force conditions, and reduce the risk of stress concentration between the second shell 120 and the first shell 110, thereby improving the stability and reliability of the use of the tooling 100, thereby ensuring the accuracy of the sealing welding test of the flange 180 and the water pipe 170. On the other hand, it can also enhance the stability of the connection between the first shell 110 and the second shell 120.

[0078] In some embodiments, second mounting holes 190 are correspondingly provided on the first shell 110 and the second shell 120 for a plurality of second fasteners to pass through, so that the second fasteners can securely connect the first shell 110 and the second shell 120 .

[0079] In some embodiments, the first fastener and the second fastener may be configured as bolts.

[0080] For example, when the flange 180 is fixed on the first through hole 111, the helium detector can be connected to the second through hole 112. The helium detector can evacuate the interior of the test chamber 130 into a vacuum state, and then spray helium toward the welded connection between the flange 180 and the water pipe 170 on the side of the first shell 110 away from the test chamber 130. If the helium detector detects that there is helium inside the test chamber 130, the sealing of the connection between the flange 180 and the water pipe 170 is poor. If the helium detector does not detect helium inside the test chamber 130 or the detected helium is less than a threshold value, the sealing of the connection between the flange 180 and the water pipe 170 is good.

[0081] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0082] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0083] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

[0084] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A tool for testing the sealing performance of water pipe and flange welding, characterized in that: include: a first shell; a second housing detachably mounted on the first housing, wherein the second housing and the first housing define a test chamber; A first through hole is provided on the first shell, and the first through hole passes through the first shell along the thickness direction of the first shell. The first through hole is suitable for being sealed by a flange installed on the test chamber.

2. The tooling according to claim 1, characterized in that: There are a plurality of the first through holes, and the inner diameters of the plurality of the first through holes are different, and / or the cross-sectional shapes of the plurality of the first through holes are different.

3. The tooling according to claim 1, characterized in that: The first housing has a first side surface facing the test chamber. A first sealing member is provided in an area of the first side surface surrounding the first through hole. The first sealing member is adapted to cooperate with the flange.

4. The tooling according to claim 3, characterized in that: A first groove is provided on the first side surface, the first groove surrounds the first through hole, and the first sealing member is provided in the first groove.

5. The tooling according to claim 1, characterized in that: The first shell is further provided with a second through hole. The second through hole passes through the first shell along the thickness direction of the first shell. The second through hole is used to connect to the vacuum pump.

6. The tooling according to any one of claims 1 to 5, characterized in that: The first shell is constructed as a plate-like structure. The second shell includes a bottom wall and a peripheral wall. The peripheral wall is connected to the outer periphery of the bottom wall and extends toward the first shell. One end of the peripheral wall away from the bottom wall is connected to the first shell.

7. The tooling according to claim 6, characterized in that: A second sealing member is provided between an end of the peripheral wall away from the bottom wall and the first shell.

8. The tooling according to claim 7, characterized in that: A second groove is provided at one of the first shell and an end of the peripheral wall away from the bottom wall, and the second sealing member is provided in the second groove.

9. The tooling according to claim 1, characterized in that: The first shell is provided with a plurality of first mounting holes, the plurality of first mounting holes surround the first through hole, and the plurality of first mounting holes are used for a plurality of first fasteners to pass through so that the first fasteners are matched with the flange.

10. The tooling according to claim 1, characterized in that: The first shell and the second shell are fixedly connected by a plurality of second fasteners.

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