A high-temperature sealing material testing system for local vacuum electron beam welding

Abstract

The present invention provides a high-temperature sealing material testing system for local vacuum electron beam welding, comprising: a support device, which is limited to be fixed relative to the ground; a moving device, which is used to load the weld plate, and the moving device can drive the weld plate to move as a whole; a test plate, which is installed above the support device, and a sealing ring connector is provided on the lower surface of the test plate, and the sealing ring connector is used to connect the part to be tested; a pressurizing device, which can adjust the pressure borne by the part to be tested on the test plate; and a traction device, which is used to adjust the relative position of the moving device on the support device. The high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention can simultaneously perform rapid tests on the high-temperature resistance, plastic sealing and stacking damage performance of the part to be tested on the test plate. The test plate can be replaced with a simple operation, which greatly improves the efficiency and reliability of the sealing performance testing of high-temperature sealing materials for local vacuum electron beam welding.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing performance, in particular to a high-temperature sealing material testing system for local vacuum electron beam welding. Background Art

[0002] Electron beam welding (EBW) is a fusion welding method that has rapidly developed with the advancement of modern science and technology. Electron beams offer high energy density, high weld depth-to-width ratios (up to 15:1), a small heat-affected zone (HAZ), minimal workpiece deformation, and fine-grained metals. The weld metal thickness ranges from 1 to 150 mm, and no beveling or welding wire is required. The weld quality is high, achieved in a single pass, something unattainable with other welding methods. Considering factors such as welding efficiency and quality, EBW offers advantages over other welding methods, particularly in welding thick metal plates exceeding 50 mm. EBW offers a significant advantage, achieving full penetration in a single pass, significantly reducing the number of welds and shortening the welding process. For example, when welding a metal ring with a thickness of 100 mm and an inner diameter of 5000 mm, if narrow gap tungsten inert gas shielded arc welding is used, multiple passes are performed, each pass has a filling thickness of 1.5 mm to 2 mm, and a welding speed of 80 mm / min to 120 mm / min, then the welding time will be at least 110 hours. If the cooling time required for temperature control between welding layers is taken into account, the welding cycle will need to be further extended. For the same workpiece, the welding cycle for vacuum electron beam welding is about 2 hours.

[0003] However, this type of welding needs to be carried out in a vacuum environment. For the welding of large-size pipes for ship systems, the weld seam after welding must move relative to the weld seam of the vacuum electron beam welding. Therefore, how to ensure the sealing of the vacuum electron beam welding space and the performance testing of high-temperature sealing materials used for local vacuum electron beam welding are technical problems that need to be urgently solved by technical personnel in this field in China. There are currently no ready-made testing systems, equipment and tools. Summary of the Invention

[0004] In view of this, the present invention aims to propose a high-temperature sealing material testing system for local vacuum electron beam welding to solve the technical problems in the prior art that the sealing material performance is difficult to detect or the function is relatively single when detecting local vacuum electron beam welding.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A high-temperature sealing material testing system for local vacuum electron beam welding, comprising:

[0007] The supporting device is limited to be fixed relative to the ground;

[0008] A moving device, used for loading the weld plate, wherein the moving device can drive the weld plate to move relatively on the supporting device as a whole;

[0009] A test platen is mounted above the support device, with a sealing ring connector provided on its lower surface for connecting to the test piece. A first connecting pipe and a second connecting pipe are provided within the sealing ring connector. The first connecting pipe passes through the test platen and is connected to a vacuum pump. The second connecting pipe passes through the test platen and is connected to a pressure gauge. The height of the test platen above the support device can be relatively adjusted.

[0010] A pressurizing device capable of adjusting the pressure borne by the test piece on the test plate when in contact with the weld plate;

[0011] The traction device is used to adjust the relative position of the moving device on the supporting device.

[0012] Furthermore, the moving device includes a moving bracket, a wheel assembly is arranged below the moving bracket, and a limiting device is arranged above the moving bracket, and the limiting device is used to accommodate and limit the welding plate.

[0013] Furthermore, the limiting device includes a first limiting baffle, a second limiting baffle, a third limiting baffle and a fixed baffle, the fixed baffle is arranged on one end of the mobile bracket close to the traction device, the first limiting baffle, the second limiting baffle and the third limiting baffle are detachably connected to the mobile bracket through a first limiting bolt, the first limiting bolt is installed vertically up and down, and a second limiting bolt is arranged on the first limiting baffle, the second limiting baffle and the third limiting baffle, and the second limiting bolt is installed horizontally from the outside to the inside.

[0014] Furthermore, the wheel assemblies are provided in four groups, and the center lines of two wheel assemblies arranged in the direction of movement are collinear.

[0015] Furthermore, the support device includes a support frame, a track is provided on the upper surface of the support frame, and the wheel assembly moves horizontally along the track under the action of the traction device.

[0016] Furthermore, the traction device includes a handwheel and a first adjusting rod, the first adjusting rod passes through the first adjusting plate and is threadedly connected to the threaded connecting plate, the first adjusting plate is fixed on the upper surface of the support frame, the first adjusting rod and the first adjusting plate are hingedly connected through a bearing or a clamping plate, and the threaded connecting plate is fixed on the movable bracket.

[0017] Furthermore, the test pressure plate includes a plate body, the sealing ring connector is welded to the lower surface of the plate body, the plate body is arranged in a rectangular shape, the center of the sealing ring connector coincides with the center of the plate body, and a limit seat is arranged at the upper end of the four azimuth angles of the plate body, and the limit seat is used to limit the installation of the pressure device.

[0018] Furthermore, the sealing ring connector includes a first sealing layer and a second sealing layer, a sealed inner cavity is formed between the first sealing layer and the second sealing layer, and the part to be detected is assembled into the sealed inner cavity.

[0019] Furthermore, the pressure-applying device includes a second adjusting rod and a pressure spring. A through hole is provided at the center of the limit seat. The lower end of the second adjusting rod passes through the through hole and is connected to the first connecting plate. The first connecting plate is fixed on the support frame. The pressure spring is sleeved on the second adjusting rod, and the lower end of the pressure spring extends into the interior of the limit seat and abuts against the upper surface of the plate body. A spring seat is provided above the pressure spring, and a first adjusting nut is provided at the upper end of the spring seat. The first adjusting nut is threadedly connected to the second adjusting rod.

[0020] Furthermore, a second adjusting nut is provided below the plate at a position corresponding to the through hole, and the second adjusting nut is threadedly connected to the second adjusting rod.

[0021] Compared with the prior art, the high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention has the following advantages:

[0022] (1) The high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention can simultaneously perform rapid tests on the high-temperature resistance, plastic sealing and stacking damage performance of the parts to be tested on the test pressure plate. The test pressure plate can be replaced simply, which greatly improves the efficiency and reliability of the sealing performance testing of high-temperature sealing materials for local vacuum electron beam welding.

[0023] (2) The high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention is a mobile device formed by detachable fixing of steel plates, channel steels and square tubes. On the one hand, it ensures the overall structural strength of the mobile device and avoids the deformation of the mobile bracket when the pressurizing device is pressurized. At the same time, it is also convenient to install or replace different weld plates, greatly improving the sealing performance testing of high-temperature sealing materials for local vacuum electron beam welding under diversified working conditions.

[0024] (3) The high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention, through the provision of a traction device and a pressurizing device, enables the weld plate fixed on the mobile device to be suitable for working conditions under different speeds and pressures when conducting sealing performance testing. It has an ingenious structure, convenient operation, and reliable adjustment, further ensuring the efficiency and reliability of the sealing performance testing of high-temperature sealing materials for local vacuum electron beam welding.

[0025] (4) The high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention can quickly test the sealing performance of sealing materials when used for local vacuum electron beam welding, and can simultaneously perform high-temperature resistance, mobile plastic sealing and sealing performance tests under different surfacing heights, so that the tested seals can be applied to different working conditions, greatly reducing the test cost, greatly improving the sealing performance testing efficiency, and can quickly and reliably determine the sealing materials suitable for local vacuum electron beam welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 This is a schematic front view of the structure of a high-temperature sealing material testing system for local vacuum electron beam welding according to an embodiment of the present invention;

[0028] Figure 2 This is a side structural schematic diagram of a high-temperature sealing material testing system for local vacuum electron beam welding according to an embodiment of the present invention;

[0029] Figure 3 This is a side structural diagram of a mobile device according to an embodiment of the present invention;

[0030] Figure 4 2 is a schematic side view of the mobile device according to an embodiment of the present invention from a second viewing angle;

[0031] Figure 5 This is a front view structural diagram of the test platen according to an embodiment of the present invention;

[0032] Figure 6 Schematic diagram of the side structure of the test platen according to an embodiment of the present invention;

[0033] Figure 7 Schematic diagram of the side structure of the test platen according to the embodiment of the present invention from a second viewing angle;

[0034] Figure 8 Schematic diagram of the top view of the weld plate according to an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the high-temperature sealing material testing system for local vacuum electron beam welding according to an embodiment of the present invention when testing a component to be tested;

[0036] Figure 10 Schematic diagram of the cross-sectional structure of the component to be tested prepared in an embodiment of the present invention;

[0037] Description of reference numerals:

[0038] 1-Support device; 101-Support frame; 102-Base plate; 103-Track; 104-First adjustment plate; 105-First connecting plate; 2-Moving device; 21-Moving bracket; 22-Wheel assembly; 23-First limiting baffle; 24-Second limiting baffle; 25-Third limiting baffle; 26-Fixed baffle; 27-Support platform; 28-Threaded connecting plate; 29-First limiting bolt; 210-Second limiting bolt; 3-Test pressure plate; 31-Plate body; 32-Limiting seat; 33-Through hole; 34 -Second connecting pipe; 4-Traction device; 401-Handwheel; 402-First adjusting rod; 5-Sealing ring connector; 51-First sealing layer; 52-Second sealing layer; 53-Sealed inner cavity; 6-Pressure gauge; 7-First connecting pipe; 8-Pressure device; 81-Second adjusting rod; 82-Pressure spring; 83-Spring seat; 84-First adjusting nut; 85-Second adjusting nut; 9-Weld plate; 91-Weld; 10-Part to be tested; 1001-Sealing ring; 1002-Deformation cavity; 11-Vacuum pump. DETAILED DESCRIPTION

[0039] In order to make the technical means, objectives and effects of the present invention easier to understand, embodiments of the present invention are described in detail below with reference to specific figures.

[0040] It should be noted that all terms used in the present invention to indicate direction and position, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative position relationship and connection status between the components in a certain specific state (as shown in the accompanying drawings). They are only for the convenience of describing the present invention, and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0041] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0042] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0043] Example 1

[0044] like Figures 1 to 9 As shown, the present invention discloses a high-temperature sealing material testing system for local vacuum electron beam welding, comprising:

[0045] The support device 1 is limited to be fixed relative to the ground;

[0046] A moving device 2 is used to load the weld plate 9, and the moving device 2 can drive the weld plate 9 to move relatively on the supporting device 1;

[0047] A test platen 3 is mounted above the support device 1. A sealing ring connector 5 is provided on the lower surface of the test platen 3. The sealing ring connector 5 is used to connect to the test object 10. A first connecting pipe 7 and a second connecting pipe 34 are provided within the sealing ring connector 5. The first connecting pipe 7 passes through the test platen 3 and is connected to the vacuum pump 11. The second connecting pipe 34 passes through the test platen 3 and is connected to the pressure gauge 6. The height of the test platen 3 above the support device 1 can be relatively adjusted.

[0048] A pressurizing device 8 capable of adjusting the pressure borne by the test piece 10 on the test plate 3 when in contact with the weld plate 9;

[0049] The traction device 4 is used to adjust the relative position of the moving device 2 on the supporting device 1.

[0050] During their research, the applicant discovered that for local vacuum electron beam welding of large-sized pipes used in ship systems, the sealing performance of the seals set around the electron beam gun is of paramount importance in achieving vacuum welding. However, since the weld formed by the electron beam gun on the welded part is long and the temperature of the weld is extremely high after welding, the seals are required to have strong high-temperature resistance and a certain degree of deformation ability. For existing seals, generally high-temperature resistant materials have extremely high rigidity. Therefore, when high-temperature sealing materials are used for local vacuum electron beam welding, when encountering moving welds, the sealing materials are very likely to fail due to their poor deformation ability, thereby affecting the overall performance of vacuum electron beam welding. Therefore, the applicant needs to improve the existing sealing materials and continuously test the sealing properties of the improved seals. The applicant has designed a high-temperature sealing material testing system for local vacuum electron beam welding as described above. When in use, the weld plate 9 is loaded and fixed on the moving device 2. When the weld plate 9 on the moving device 2 moves to the bottom of the test pressure plate 3 under the action of the traction device 4, the height of the test pressure plate 3 and the pressure on the part to be tested 10 are adjusted by adjusting the pressurizing device 8. At this time, the lower surface of the part to be tested 10 covers the weld 91 of the weld plate 9 and is in sealing contact with the upper surface of the weld plate 9. The air in the sealed inner cavity 53 is extracted through the first connecting pipe 7 connected to the vacuum equipment to form a vacuum state. The air pressure inside the sealed inner cavity 53 is detected by the pressure gauge 6 connected to the second connecting pipe 34. During the detection process, the traction device 4 can be adjusted as needed to drive the weld plate 9 to move relative to the part to be detected 10 to perform dynamic sealing performance detection of the weld. The pressurizing device 8 can be adjusted as needed to perform sealing performance detection under different pressure states of the part to be detected 10. At the same time, the weld height on the weld plate 9 can be adjusted as needed to perform sealing performance detection of the part to be detected 10 under different welding height conditions. This greatly improves the efficiency of sealing performance detection of high-temperature sealing materials for local vacuum electron beam welding and facilitates replacement of the test pressure plate 3.

[0051] The high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention can simultaneously perform rapid tests on the high-temperature resistance, plastic sealing and stacking damage performance of the test piece 10 on the test pressure plate 3. Replacing the test pressure plate 3 is simple, which greatly improves the efficiency and reliability of the sealing performance testing of high-temperature sealing materials for local vacuum electron beam welding.

[0052] As a preferred example of the present invention, the mobile device 2 includes a mobile bracket 21, a wheel assembly 22 is provided below the mobile bracket 21, and a limiting device is provided above the mobile bracket 21, the limiting device being used to accommodate and limit the weld plate 9. Specifically, as an example of the present invention, the mobile bracket 21 includes a transverse link and a longitudinal link (arranged along the direction of movement of the trolley) that are integrally formed and arranged vertically, and the transverse link and the longitudinal link of the mobile bracket 21 are made of channel steel by welding.

[0053] This setting discloses a structure of a mobile device 2, which ensures the overall structural strength of the mobile device 2, avoids the mobile bracket 21 from being deformed by force when the pressurizing device 8 is pressurized, and improves the reliability of the high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention.

[0054] As a preferred example of the present invention, the limiting device includes a first limiting baffle 23, a second limiting baffle 24, a third limiting baffle 25 and a fixed baffle 26, and the fixed baffle 26 is arranged on one end of the mobile bracket 21 close to the traction device 4, and the first limiting baffle 23, the second limiting baffle 24, and the third limiting baffle 25 are detachably connected to the mobile bracket 21 through a first limiting bolt 29, and the first limiting bolt 29 is installed vertically up and down, and a second limiting bolt 210 is arranged on the first limiting baffle 23, the second limiting baffle 24, and the third limiting baffle 25, and the second limiting bolt 210 is installed horizontally from the outside to the inside. Preferably, a support platform 27 is formed on the upper surface of the movable bracket 21 between the first limit baffle 23, the second limit baffle 24, the third limit baffle 25 and the fixed baffle 26 for installing and placing the weld plate 9, and at least two first limit bolts 29 are set to detachably connect the first limit baffle 23 and the movable bracket 21, at least two first limit bolts 29 are set to detachably connect the second limit baffle 24 and the movable bracket 21, and at least two first limit bolts 29 are set to detachably connect the third limit baffle 25 and the movable bracket 21; at least two second limit bolts 210 are set on the first limit baffle 23, and the two second limit bolts 210 are on the outside of the first limit bolt 29 on the first limit baffle 23. The setting method of the second limit bolts 210 on the second limit baffle 24 and the third limit baffle 25 is similar to that of the second limit bolt 210 on the first limit baffle 23, and will not be repeated here.

[0055] By setting up the removable first limit baffle 23, the second limit baffle 24, the third limit baffle 25 and the fixed baffle 26, it is convenient to install and fix different weld plates 9. At the same time, through the adjustment of the second limit bolt 210, on the one hand, the limit device can be applied to weld plates 9 of different sizes or types, thereby improving its applicability. On the other hand, it also improves the convenience of replacing the weld plate 9 and the stability of fixing, thereby further improving the reliability of sealing detection.

[0056] In a preferred embodiment of the present invention, four wheel assemblies 22 are provided, with the centerlines of two wheel assemblies 22 arranged in the direction of motion collinear. Two of the wheel assemblies 22 are mounted on a longitudinal link arranged in a front-to-rear pattern along the direction of motion on the mobile support 21, and the other two wheel assemblies 22 are mounted on another longitudinal link. Preferably, the wheels of the wheel assemblies 22 are pressure-bearing wheels.

[0057] This arrangement further improves the reliability of the movement of the mobile device 2 on the mobile bracket 21, especially the reliability and stability of the movement when the weld plate 9 is under pressure, and further improves the efficiency and reliability of the sealing detection of the high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention.

[0058] As a preferred example of the present invention, the support device 1 includes a support frame 101, a track 103 is provided on the upper surface of the support frame 101, and the wheel assembly 22 moves horizontally along the track 103 under the action of the traction device 4. As an example of the present invention, the support frame 101 is a rectangular frame formed by welding channel steel. Two tracks 103 are provided on the support frame 101, each track 103 being formed by welding two square steel bars. As a preferred example of the present invention, a base plate 102 is provided at the lower end of the support frame 101 for leveling the support device 1 and ensuring that the support device 1 is securely fixed relative to the ground.

[0059] This arrangement not only facilitates the production of the supporting device 1 , but also enhances the structural strength of the supporting device 1 , thereby ensuring the reliability of the sealing test of the component to be tested 10 .

[0060] As a preferred embodiment of the present invention, the traction device 4 includes a handwheel 401 and a first adjustment rod 402. The first adjustment rod 402 passes through the first adjustment plate 104 and is threadedly connected to the threaded connecting plate 28. The first adjustment plate 104 is fixed to the upper surface of the support frame 101. The first adjustment rod 402 is hingedly connected to the first adjustment plate 104 via a bearing or a clamping plate. The threaded connecting plate 28 is fixed to the movable bracket 21. This configuration discloses a structure in which the traction device 4 drives the movable device 2 to move horizontally forward or backward. During use, by rotating the handwheel 401, the handwheel 401 drives the first adjustment rod 402 to rotate integrally. Under the action of the first adjustment plate 104, the first adjustment rod 402 can only rotate. The threaded portion formed on the end of the first adjustment rod 402 away from the handwheel 401 is threadedly connected to the threaded connecting plate 28. When the first adjustment rod 402 rotates, it can drive the threaded connecting plate 28 to move forward or backward, thereby driving the movable bracket 21 and the weld plate 9 to move forward or backward as a whole. Preferably, the first adjustment rod 402 is arranged on the center line between the two rails 103 .

[0061] This setting drives the movement adjustment of the mobile device 2 by adjusting the traction device 4 manually or with the help of mechanical tools. It has a simple structure, reliable transmission, and convenient adjustment, which further improves the stability and reliability of the movement adjustment of the mobile device 2. At the same time, the movement speed of the mobile device 2 can be adjusted quickly or slowly as needed, thereby improving the sealing detection of the diversified working conditions of the part 10 to be tested.

[0062] As a preferred example of the present invention, the test pressure plate 3 includes a plate body 31, the sealing ring connector 5 is welded to the lower surface of the plate body 31, the plate body 31 is arranged in a rectangular shape, the center of the sealing ring connector 5 coincides with the center of the plate body 31, and a limit seat 32 is provided at the upper end of the four azimuth angles of the plate body 31, and the limit seat 32 is used to limit the installation of the pressure device 8.

[0063] As a preferred example of the present invention, the sealing ring connector 5 includes a first sealing layer 51 and a second sealing layer 52, with a sealed inner cavity 53 formed between the first sealing layer 51 and the second sealing layer 52. The part to be tested 10 is assembled into the sealed inner cavity 53. As an example of the present invention, the sealed inner cavity 53 is subjected to a water leakage test after being welded to the plate body 31, and the part to be tested 10 is interference fit with the sealed inner cavity 53.

[0064] This arrangement further improves the convenience and stability of the installation of the pressurizing device 8, while also ensuring that the test platen 3 can be evenly loaded on the test piece 10 when adjusting the pressure, thereby ensuring the reliability of the sealing performance test of the test piece 10 under different pressures.

[0065] As a preferred example of the present invention, the pressurizing device 8 includes a second adjusting rod 81 and a pressure spring 82. A through hole 33 is provided at the center of the limit seat 32. The lower end of the second adjusting rod 81 passes through the through hole 33 and is connected to the first connecting plate 105. The first connecting plate 105 is fixed to the support frame 101. The pressure spring 82 is sleeved on the second adjusting rod 81, and the lower end of the pressure spring 82 extends into the interior of the limit seat 32 and abuts against the upper surface of the plate body 31. A spring seat 83 is provided above the pressure spring 82, and a first adjusting nut 84 is provided at the upper end of the spring seat 83. The first adjusting nut 84 is threadedly connected to the second adjusting rod 81. As an example of the present invention, the first connecting plate 105 is provided on the outer upper edge of the support frame 101, and two connecting ribs ( Figure 1 ), the connecting rib is welded to the supporting frame 101.

[0066] This setting discloses the structure of a pressurizing device 8, which simultaneously realizes the rapid fixation of the pressure spring 82 and the quick adjustment of the spring pressure, further improving the pressure adjustment during the sealing test of the high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention, and further improving the sealing test of the component 10 to be tested under various working conditions.

[0067] Preferably, a second adjusting nut 85 is provided below the plate 31 at a position corresponding to the through hole 33, and the second adjusting nut 85 is threadedly connected to the second adjusting rod 81. This arrangement facilitates adjustment of the height of the plate 31 relative to the support device 1, has a simple structure, is easy to operate, and provides a stable connection.

[0068] As a specific example of the present invention, the total spring pressure value of the pressure spring 82 is not less than 800KG, the total test pressure value of the test piece 10 is the weight of the steel plate plus the spring pressure, the test stroke of the moving device 2 is 150mm, the length of the plate body 31 of the test pressure plate 3 is in the range of 500mm to 700mm, the width of the plate body 31 of the test pressure plate 3 is in the range of 260mm to 520mm, and the length of the plate body 31 is greater than the width of the plate body 31, the pressure gauge 6 is a commercially available pressure gauge, and its vacuum pressure gauge measurement range is -0.1MPa--0.9MPa, and there must be no oil or water when the vacuum pump 11 and the test piece 10 are subjected to the sealing performance test.

[0069] As an example of the present invention, the present invention also discloses a method for testing high-temperature sealing materials for local vacuum electron beam welding, comprising the following steps:

[0070] S1: Install the test piece 10 on the sealing ring connector 5 on the lower surface of the test plate 3, install the test piece 10 into the sealed inner cavity 53 on the sealing ring connector 5 with an interference fit, and calibrate the lower surface of the test piece 10 to be flush;

[0071] S2: Adjust the second adjusting nut 85 and the first adjusting nut 84 to select a predetermined height of the test platen 3 relative to the support frame 101 and a preset pressure value of the pressure spring 82;

[0072] S3: Select a weld plate 9 with a first weld height H1 and install the weld plate 9 on the support platform 27 inside the limiting device;

[0073] S4: Adjust the traction device 4 by rotating the hand wheel 401 to drive the wheel assembly 22 on the moving device 2 to move along the track 103 toward one side of the traction device 4, so that the weld 91 on the weld plate 9 slides along a straight line across the lower surface of the workpiece 10 to be inspected according to a preset rotation speed;

[0074] S5: During the sliding process of the weld plate 9, the value of the pressure gauge 6 is recorded to determine whether the maximum fluctuation value of the pressure gauge 6 is greater than a preset threshold value. If so, proceed to S6; if not, proceed to S7;

[0075] S6: Adjust and increase the pressure of the pressure spring 82, and enter S4 again until the pressure spring 82 is adjusted to the maximum pressure value. If the maximum fluctuation value of the pressure gauge 6 in step S5 is still greater than the preset threshold, mark the seal;

[0076] S7: Replace the weld plate 9 and select a weld plate 9 with a second weld height H2, where H2>H1, and then proceed to S4 again to detect the stacking damage sealing performance of the component to be inspected 10.

[0077] The high-temperature sealing material testing method for local vacuum electron beam welding described in the present invention is applied to the high-temperature sealing material testing system for local vacuum electron beam welding described in the present invention. It can quickly perform sealing performance testing of the part to be tested 10 when it is used for local vacuum electron beam welding. It can simultaneously perform high-temperature resistance, mobile plastic sealing and sealing performance testing under different surfacing heights, so that the tested sealing parts can be applied to different working conditions, greatly reducing the test cost, greatly improving the sealing performance testing efficiency, and can quickly and reliably determine the sealing materials suitable for local vacuum electron beam welding.

[0078] The applicant further discovered during research that nitrile rubber (NBR) is a copolymer of butadiene and acrylonitrile. It has excellent oil resistance, wear resistance, heat resistance, and adhesion, making it the most commonly used raw material for sealing rubber. However, nitrile rubber seals prepared using different modifications and processing techniques generally exhibit different properties. Seals used in vacuum electron beam welding require high wear resistance, high temperature resistance, high elasticity, and high strength. The components of the test piece 10 described in the present invention include:

[0079] 100 parts of a nitrile rubber copolymer; in the present invention, the nitrile rubber copolymer is manufactured by copolymerization of α, β-ethylenically unsaturated monocarboxylic acid alkyl ester monomers or α, β-ethylenically unsaturated monocarboxylic acid alkoxyalkyl ester monomers; the Mooney viscosity (ML1+4, 100°C) of the nitrile rubber copolymer is preferably 35 to 65.

[0080] The method for producing the acrylonitrile-butadiene rubber copolymer rubber used in the present invention is not particularly limited, and can be produced by copolymerizing the above-mentioned monomers and, if necessary, hydrogenating the carbon-carbon double bonds in the resulting copolymer. The polymerization method is not particularly limited, and can be carried out by a known emulsion polymerization method or solution polymerization method. During the polymerization, in addition to using an emulsifier, a polymerization initiator, and a molecular weight regulator, commonly used polymerization auxiliary materials can also be used.

[0081] 35-55 parts of liquid nitrile rubber modified carbon black; the liquid nitrile rubber modified carbon black is obtained by reacting amino-terminated liquid nitrile rubber with carbon black treated with an epoxy silane coupling agent;

[0082] 3 to 5 parts of a composite vulcanizing agent; the composite vulcanizing agent preferably includes sulfur, dicumyl peroxide and N, N'-m-phenylene bismaleimide (HVA-2);

[0083] 1 to 3 parts of a copolymeric antioxidant; wherein the copolymeric antioxidant includes N-(4-anilinophenyl) acrylamide, N-(4-anilinophenyl) methacrylamide, N-(4-anilinophenyl) cinnamic acid amide, N-(4-anilinophenyl) crotonamide, N-phenyl-4-(3-vinylbenzyloxy) aniline, N-phenyl-4-(4-vinylbenzyloxy) aniline, etc.;

[0084] 1 to 3 parts of an accelerator; wherein the accelerator preferably includes one or more of triallyl cyanurate, triallyl isocyanurate and m-phenylene bismaleimide.

[0085] When preparing the test piece 10, the nitrile rubber copolymer, the nitrile rubber modified carbon black, the amine crosslinking agent, the copolymerizable anti-aging agent and the accelerator are mixed or extruded. Preferably, the test piece 10 is extruded through a special mold to obtain the test piece 10, such as Figure 10As shown, the test piece prepared by this solution can be continuously formed, with low cost and high efficiency, while improving the product yield rate. The test piece 10 includes a sealing ring 1001, and a hollow deformation cavity 1002 is provided in the cross-sectional direction of the sealing ring 1001. Preferably, the deformation cavity 1002 is any one or more of the structures such as a circle, a rhombus or a regular polygon. By providing the hollow deformation cavity 1002 inside the sealing ring 1001, the overall elastic deformation performance of the test piece 10 is further improved.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-temperature sealing material testing system for local vacuum electron beam welding, characterized in that: include: The supporting device (1) is limited to be fixed relative to the ground; A moving device (2) is used to load the weld plate (9), and the moving device (2) can drive the weld plate (9) to move relatively on the supporting device (1) as a whole; during the detection process, the weld plate (9) needs to be moved relative to the test piece (10) to detect the sealing performance of the weld under dynamic conditions; A test pressure plate (3) is installed above the support device (1), and a sealing ring connector (5) is provided on the lower surface of the test pressure plate (3), and the sealing ring connector (5) is used to connect the to-be-tested part (10). A first connecting pipe (7) and a second connecting pipe (34) are provided in the sealing ring connector (5), and the first connecting pipe (7) passes through the test pressure plate (3) and is connected to the vacuum pump (11), and the second connecting pipe (34) passes through the test pressure plate (3) and is connected to the pressure gauge (6). The height of the test pressure plate (3) above the support device (1) can be relatively adjusted; A pressure device (8) capable of adjusting the pressure borne by the test piece (10) on the test pressure plate (3) when in contact with the weld plate (9); A traction device (4) is used to adjust the relative position of the moving device (2) on the supporting device (1).

2. The high-temperature sealing material testing system for local vacuum electron beam welding according to claim 1, characterized in that: The moving device (2) comprises a moving bracket (21), a wheel assembly (22) is provided below the moving bracket (21), and a limiting device is provided above the moving bracket (21), the limiting device being used to accommodate and limit the welding plate (9).

3. The high-temperature sealing material testing system for local vacuum electron beam welding according to claim 2, characterized in that: The limiting device comprises a first limiting baffle (23), a second limiting baffle (24), a third limiting baffle (25) and a fixed baffle (26); the fixed baffle (26) is arranged on one end of the movable bracket (21) close to the traction device (4); the first limiting baffle (23), the second limiting baffle (24) and the third limiting baffle (25) are detachably connected to the movable bracket (21) via a first limiting bolt (29); the first limiting bolt (29) is installed vertically up and down; a second limiting bolt (210) is arranged on the first limiting baffle (23), the second limiting baffle (24) and the third limiting baffle (25); the second limiting bolt (210) is installed horizontally from the outside to the inside.

4. The high-temperature sealing material testing system for local vacuum electron beam welding according to claim 2, characterized in that: The wheel assemblies (22) are provided in four groups, and the center lines of two wheel assemblies (22) arranged in the direction of movement are collinear.

5. The high-temperature sealing material testing system for local vacuum electron beam welding according to claim 2, 3 or 4, characterized in that: The support device (1) comprises a support frame (101), a track (103) is provided on the upper surface of the support frame (101), and the wheel assembly (22) moves horizontally along the track (103) under the action of a traction device (4).

6. The high-temperature sealing material testing system for local vacuum electron beam welding according to claim 5, characterized in that: The traction device (4) comprises a hand wheel (401) and a first adjustment rod (402); the first adjustment rod (402) passes through a first adjustment plate (104) and is threadedly connected to a threaded connection plate (28); the first adjustment plate (104) is fixed to the upper surface of the support frame (101); the first adjustment rod (402) and the first adjustment plate (104) are hingedly connected via a bearing or a clamping plate; and the threaded connection plate (28) is fixed to the movable bracket (21).

7. The high-temperature sealing material testing system for local vacuum electron beam welding according to claim 1 or 6, characterized in that: The test pressure plate (3) includes a plate body (31), the sealing ring connector (5) is welded to the lower surface of the plate body (31), the plate body (31) is arranged in a rectangular shape, the center of the sealing ring connector (5) coincides with the center of the plate body (31), and a limit seat (32) is provided at the upper end of the four azimuth angles of the plate body (31), and the limit seat (32) is used for limiting the installation of the pressure device (8).

8. The high-temperature sealing material testing system for local vacuum electron beam welding according to claim 7, characterized in that: The sealing ring connector (5) comprises a first sealing layer (51) and a second sealing layer (52), a sealed inner cavity (53) is formed between the first sealing layer (51) and the second sealing layer (52), and the part to be detected (10) is assembled into the sealed inner cavity (53).

9. The high-temperature sealing material testing system for local vacuum electron beam welding according to claim 7, characterized in that: The pressurizing device (8) includes a second adjusting rod (81) and a pressure spring (82). A through hole (33) is provided at the center of the limiting seat (32). The lower end of the second adjusting rod (81) passes through the through hole (33) and is connected to the first connecting plate (105). The first connecting plate (105) is fixed on the supporting frame (101). The pressure spring (82) is sleeved on the second adjusting rod (81), and the lower end of the pressure spring (82) extends into the interior of the limiting seat (32) and abuts against the upper surface of the plate body (31). A spring seat (83) is provided above the pressure spring (82), and a first adjusting nut (84) is provided at the upper end of the spring seat (83). The first adjusting nut (84) is threadedly connected to the second adjusting rod (81).

10. The high-temperature sealing material testing system for local vacuum electron beam welding according to claim 9, characterized in that: A second adjusting nut (85) is provided below the plate body (31) at a position corresponding to the through hole (33), and the second adjusting nut (85) is threadedly connected to the second adjusting rod (81).

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