Getter fixing ring, getter self-adaptive packaging structure and mounting method

Abstract

The invention relates to the technical field of preparation of an infrared detector Dewar assembly, and particularly provides a getter fixing ring, a getter self-adaptive packaging structure and an installation method.The fixing ring comprises an annular part, a welding part and an opening part, the welding part and the opening part are arranged on the annular part, and the width of the annular part is larger than the thickness of the annular part; the welding part is arranged to be an outwards-protruding section protruding out of the annular part, and the opening parts are arranged to be the two ends, extending outwards, of the annular part. The clamping force of the getter fixing ring on the getter can be controlled by clamping the two ends of the opening part, operation is easy, the structure is simple and compact, the installation area is small, and the problems that in the related technology, a getter fixing structure is difficult to fix and weld, small in bearable vibration impact load and poor in reliability can be solved. And miniaturization of the Dewar is not facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of infrared detector dewar components, and in particular to a getter fixing ring, a getter adaptive packaging structure and an installation method. Background Art

[0002] At present, under the guidance of the SWaP (Size, Weight, and Power) concept, the development of infrared detectors is focused on large specifications and miniaturization. As an important component of infrared detectors, the development trend of dewar is miniaturization and compactness. The vacuum life of dewar will greatly affect the service life of infrared detectors, and the main factors affecting the vacuum life of dewar are the leak rate of dewar packaging, material selection, and parts degassing.

[0003] The most effective way to extend the vacuum life of the dewar is to install a getter. The existing Ω-ring getter fixing structure and the spring clamp getter fixing structure both integrate the fixation of the getter and the fixation of the getter assembly, and require a larger installation area when welded inside the dewar. For example, when using the Ω-ring getter fixing structure, it is necessary to expand the annular portion that clamps the getter and then weld the Ω legs to fix the shape. The fixing and welding operations of this structure are all performed on the inner surface of the small dewar. At the same time, because the getter itself cannot be subjected to a large clamping force, the getter assembly used to clamp the getter in the above structure is cross-shaped. In addition to the space occupied by the columnar getter body in the axial direction, it also needs to occupy a space that exceeds the getter diameter by 5 to 10 mm in the radial direction. Therefore, the existing getter fixing structure has poor consistency in tightness when clamping the getter, is difficult to operate and relies on the operator's feel; when the Dewar is subjected to a vibration impact test, the existing getter fixing structure and the getter are prone to relative displacement, and the vibration impact load that can be sustained is small; the installation area is large, which is not conducive to the miniaturization of the Dewar.

[0004] With regard to the problems of the getter fixing structure in the related art, such as difficult fixing welding operation, small vibration impact load bearing capacity and large installation area, no effective solution has been proposed so far. Summary of the invention

[0005] The embodiments of the present invention provide a getter fixing ring, a getter adaptive packaging structure and an installation method, which at least solve the problems in the related art that the fixing welding operation of the getter fixing structure is difficult, the vibration impact load that can be borne is small, and the installation area is large.

[0006] The invention provides a getter fixing ring, comprising an annular portion 41, a welding portion 42 and an opening portion 43; the width of the annular portion 41 is greater than the thickness of the annular portion 41; the welding portion 42 and the opening portion 43 are both arranged on the annular portion 41, wherein the welding portion 42 is arranged as an outer convex section protruding from the annular portion 41, and the opening portion 43 is arranged as two ends of the annular portion 41 extending outward. The clamping force of the getter fixing ring on the getter can be controlled by clamping the two ends of the opening portion 43, and the tightness consistency when clamping the getter is good, easy to operate and does not rely on the operator's feel and experience; the installation area of ​​the getter fixing ring is small, which is conducive to the miniaturization of the Dewar.

[0007] The getter fixing ring provided by the embodiment of the present invention has an annular portion 41 including a first annular segment and a second annular segment; the first annular segment is arranged between one end of the welding portion 42 and the opening portion 43, and the second annular segment is arranged between the other end of the welding portion 42 and the opening portion 43; wherein the length of the first annular segment is greater than the length of the second annular segment, so that the occupied installation space is smaller, which is conducive to the miniaturization of the Dewar.

[0008] The getter fixing ring provided by the embodiment of the present invention has an opening portion 43 comprising a first extension end and a second extension end; the first extension end is arranged on the first annular segment, and the second extension end is arranged on the second annular segment, the first extension end and the second extension end have the same extension length, which is 1 to 3 mm, and the gap between the first extension end and the second extension end is 0.2 to 0.5 mm, which is conducive to reducing the difficulty of clamping and welding operations on the opening portion 43.

[0009] The getter fixing ring provided by the embodiment of the present invention has a corner provided between the welding portion 42 and the annular portion 41, and a corner provided between the annular portion 41 and the opening portion 43, and the R value range of the chamfered R angle of the above corners is 0.05~0.2mm, which is beneficial to improving the durability and strength of the above getter fixing ring.

[0010] The getter fixing ring provided by the present invention has a groove width of the welding portion 42 of 0.5 to 0.7 times the curvature diameter of the getter, and a protruding depth of the welding portion 42 of 0.5 to 1 mm; the contour of the annular portion 41 is concentric with the bottom contour of the getter, and the curvature of the contour of the annular portion 41 is tangent to the curvature of the bottom contour of the getter; wherein the getter is a cylindrical getter that is pre-clamped by the annular portion 41. On the one hand, it is beneficial to improve the clamping and fixing effect of the getter fixing ring on the getter, and on the other hand, it is beneficial to realize the miniaturization of the Dewar.

[0011] The getter fixing ring provided by the present invention has a thickness of the annular portion 41 of 0.3-0.5 mm, a width of the annular portion 41 of 1-3 mm, and a material of the annular portion 41 of Kovar or stainless steel. This is conducive to achieving miniaturization of the Dewar while ensuring the overall structural strength of the getter fixing ring.

[0012] The invention provides an adaptive getter packaging structure, comprising a dewar housing 1, an insulator 2, a getter 3, and any of the above-mentioned getter fixing rings 4; the opening 43 of the getter fixing ring 4 is in a clamped state, the annular portion 41 of the getter fixing ring 4 clamps the getter 3, and the welding portion 42 of the getter fixing ring 4 is welded and fixed to the inner surface of the dewar housing 1; the first electrode 31 of the getter 3 is welded and fixed to the insulator 2, and the second electrode 32 of the getter 3 is welded and fixed to the inner surface of the dewar housing 1. The welding operation difficulty of the above-mentioned adaptive getter packaging structure is relatively low, the vibration impact load that can be withstood is relatively large, and it is conducive to realizing the miniaturization of the dewar.

[0013] The getter adaptive packaging structure provided by the embodiment of the invention has an insulator 2 which is penetrated through the Dewar housing 1 and has good electrical insulation performance.

[0014] The present invention provides an installation method for an adaptive getter packaging structure, which is applicable to any of the above-mentioned adaptive getter packaging structures, including: welding the welding portion 42 of the getter fixing ring 4 to the inner surface of the Dewar shell 1; passing the getter 3 through the annular portion 41 of the getter fixing ring 4; clamping the opening portion 43 of the getter fixing ring 4, and welding and fastening the two ends of the opening portion 43 so that the annular portion 41 clamps the getter 3; welding and fixing the first electrode 31 of the getter 3 to the electrode column of the insulator 2; and welding and fixing the second electrode 32 of the getter 3 to the inner surface of the Dewar shell 1. The installation method of the adaptive getter packaging structure is easy to operate and is conducive to miniaturization of the Dewar.

[0015] The installation method of the getter adaptive packaging structure provided by the embodiment of the invention further includes: adjusting the position of the getter fixing ring 4 so that the center of the annular portion 41 of the getter fixing ring 4 is flush with the electrode column of the insulator 2 before welding the welding portion 42 of the getter fixing ring 4 to the inner surface of the Dewar housing 1. This is conducive to determining the welding position of the welding portion 42 of the getter fixing ring 4.

[0016] The embodiments of the present invention provide a getter fixing ring, a getter adaptive packaging structure and an installation method, which solve the problems of difficult fixing welding operation, small vibration impact load and large installation area in the getter fixing structure in the related art. The clamping force of the getter fixing ring on the getter can be controlled by clamping the two ends of the opening 43. The tightness consistency when clamping the getter is good, the operation is easy and does not rely on the operator's feel and experience; the structure is simple and compact, and the vibration impact load that can be tolerated is large; the installation area of ​​the getter fixing ring is small, which is conducive to the miniaturization of the Dewar, and it can be welded to irregular surfaces and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other embodiments can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic structural diagram of a getter fixing ring in an embodiment of the invention.

[0019] Figure 2 It is a schematic diagram of an adaptive packaging structure of a getter in an embodiment of the invention.

[0020] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle Dewar housing 1.

[0021] Figure 4 yes Figure 2 Schematic diagram of the structure of the middle insulator 2.

[0022] Figure 5 yes Figure 2 Schematic diagram of the structure of the getter 3.

[0023] Figure 6 It is a flow chart of the steps of an installation method of a getter adaptive packaging structure in an embodiment of the present invention.

[0024] The above drawings include the following reference numerals:

[0025] 1—Dewar housing; 2—insulator; 3—getter; 31—first electrode of getter; 32—second electrode of getter; 4—getter fixing ring; 41—annular portion of getter fixing ring 4; 42—welding portion of getter fixing ring 4; 43—opening portion of getter fixing ring 4. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0027] The most effective way to extend the vacuum life of the Dewar is to install a getter.

[0028] Existing getter fixing structures, such as the Ω-ring getter fixing structure and the spring clamp getter fixing structure, have poor consistency in tightness when clamping the getter, are difficult to operate and rely on the operator's feel; when the Dewar is subjected to a vibration impact test, relative displacement with the getter is likely to occur, and the vibration impact load that can be sustained is small; the installation area is large, which is not conducive to the miniaturization of the Dewar.

[0029] To this end, the present invention creates an embodiment that provides a getter fixing ring, a getter adaptive packaging structure and an installation method.

[0030] Please refer to Figure 1 The embodiment of the invention shown in the figure provides an adsorbent fixing ring, comprising an annular portion 41, a welding portion 42 and an opening portion 43; the width b of the annular portion 41 is greater than the thickness a of the annular portion 41; the welding portion 42 and the opening portion 43 are both arranged on the annular portion 41, wherein the welding portion 42 is arranged as an outward convex section protruding from the annular portion 41, and the opening portion 43 is arranged at both ends of the annular portion 41 extending outward.

[0031] It is understandable that the vacuum inside the Dewar may decrease with the passage of time. Therefore, the vacuum life of the Dewar can be effectively extended by absorbing the gas that may exist inside the Dewar through the getter.

[0032] The getter fixing ring refers to a ring-shaped structure used to clamp and fix the getter.

[0033] The annular portion 41 , the welding portion 42 and the opening portion 43 may be integrally formed to reduce process errors.

[0034] The width b of the annular portion 41 is greater than the thickness a, which is beneficial for controlling the material usage of the getter fixing ring while enhancing the clamping and fixing effect of the getter fixing ring on the getter.

[0035] The welding portion 42 has, but is not limited to, the general effects of a welding lug or welding tab, such as providing a welding point and enhancing mechanical strength.

[0036] There is a gap between the two ends of the opening portion 43. During the use of the above-mentioned getter fixing ring, the clamping force of the above-mentioned getter fixing ring on the getter can be improved by clamping the opening portion 43; welding and fastening the opening portion 43 in the clamped state can maintain the clamping force of the above-mentioned getter fixing ring on the getter to fix the getter.

[0037] The getter fixing ring provided in the embodiment of the present invention can control the clamping force of the getter fixing ring on the getter by clamping the two ends of the opening 43. The getter fixing ring has good consistency in tightness when clamping the getter, is easy to operate and does not rely on the operator's feel and experience. The getter fixing ring has a simple structure, is convenient for industrial production and has low cost. The dewar using the getter fixing ring has a compact structure, can withstand large vibration impact loads and has strong structural stability. The installation area of ​​the getter fixing ring is small, which is conducive to the miniaturization of the dewar. The getter fixing ring can be welded to irregular surfaces and has strong applicability.

[0038] Specifically, the annular portion 41 of the above-mentioned getter fixing ring includes a first annular segment and a second annular segment; the first annular segment is arranged between one end of the welding portion 42 and the opening portion 43, and the second annular segment is arranged between the other end of the welding portion 42 and the opening portion 43; wherein the length of the first annular segment is greater than the length of the second annular segment.

[0039] For example, please refer to Figure 2 A schematic diagram of a getter adaptive packaging structure is shown, and Figure 3 The structural schematic diagram of the Dewar housing 1 shown in the figure shows that compared with the case where the length of the first annular segment is equal to the length of the second annular segment, the getter fixing ring 4 occupies a smaller installation space when the length of the first annular segment is greater than the length of the second annular segment, which is conducive to the miniaturization of the Dewar.

[0040] In other words, when the center of the annular portion 41, the welding portion 42, and the opening portion 43 are on the same straight line, the getter fixing ring 4 will occupy a larger installation space, which is not conducive to the miniaturization of the Dewar.

[0041] It can be understood that, in combination with symmetry, the case where the length of the first annular segment is smaller than the length of the second annular segment and the case where the length of the first annular segment is larger than the length of the second annular segment can be converted to each other in practical application.

[0042] Specifically, how much greater the length of the first annular segment is than the length of the second annular segment can be determined by technicians based on the height of the Dewar housing 1, the number of getter fixing rings 4 and the installation position in the actual application scenario.

[0043] Optionally, the opening portion 43 of the above-mentioned getter fixing ring includes a first extension end and a second extension end; the first extension end is arranged on the first annular segment, and the second extension end is arranged on the second annular segment, the first extension end and the second extension end have the same extension length, the extension length is 1~3mm, and the gap between the first extension end and the second extension end is 0.2~0.5mm.

[0044] It can be understood that the extension lengths of the first extension end and the second extension end are the same, which is beneficial to reducing the difficulty of operation during the use of the above-mentioned getter fixing ring.

[0045] If the extension length is too large, on the one hand, it will lead to unnecessary use of materials and increase production costs; on the other hand, it will occupy installation space and increase the difficulty of clamping and welding the opening portion 43 during use of the above-mentioned getter fixing ring.

[0046] If the extension length is too small, on the one hand, the clamping force of the getter fixing ring on the getter will be reduced, and on the other hand, the difficulty of welding the opening 43 will be increased, thereby reducing the welding quality and the structural stability of the getter fixing ring.

[0047] If the gap between the first extension end and the second extension end is too large, on the one hand, the getter cannot be effectively clamped and fixed by the getter fixing ring, and on the other hand, the overall structural strength of the getter fixing ring will be reduced, especially when subjected to shear force.

[0048] If the gap between the first extension end and the second extension end is too small, it may be difficult to pass the getter through the getter fixing ring during use.

[0049] Optionally, a corner is provided between the welding portion 42 and the annular portion 41 , and a corner is provided between the annular portion 41 and the opening portion 43 , and the R value range of the chamfered R angle of the above corners is 0.05-0.2 mm.

[0050] The corners can reduce friction during assembly and disperse stress, thereby improving the durability and strength of the getter fixing ring; on the other hand, they can serve as a smooth transition area during welding, making the weld more uniform and reducing welding defects.

[0051] Optionally, the groove width c of the welding portion 42 is 0.5 to 0.7 times the curvature diameter of the getter, and the protruding depth of the welding portion 42 is 0.5 to 1 mm; the contour of the annular portion 41 is concentric with the bottom surface contour of the getter, and the curvature of the contour of the annular portion 41 is tangent to the curvature of the bottom surface contour of the getter; wherein the above-mentioned getter is a cylindrical getter that is preset to be clamped by the annular portion 41.

[0052] Determining the groove width c of the welding portion 42 according to the curvature diameter of the getter can ensure that the above-mentioned getter fixing ring can tightly and evenly hold the getter, avoiding displacement or even damage of the above-mentioned getter fixing ring when the getter is activated. This is because the getter will generate greater stress during the activation process. If the groove width c of the welding portion 42 is too small, the welding area between the above-mentioned getter fixing ring and the Dewar shell will be too small, resulting in stress concentration and increasing the risk of fracture of the welding portion 42; if the groove width c of the welding portion 42 is too large, the installation space occupied by the above-mentioned getter fixing ring will be too large, which will increase the difficulty of welding, is not conducive to clamping and fixing the getter, and is not conducive to miniaturizing the Dewar.

[0053] If the protruding depth of the welding part 42 is too large, the above-mentioned getter fixing ring will occupy too large an installation space; if the protruding depth of the welding part 42 is too small, it will cause local overheating or uneven heat dissipation of the welding part 42 during the welding process, affecting the welding quality. If the protruding depth is too small, the welding part 42 may also cause unnecessary friction or extrusion of the getter.

[0054] The contour of the annular portion 41 is concentric with the contour of the bottom surface of the getter, and the curvature of the contour of the annular portion 41 is tangent to the curvature of the contour of the bottom surface of the getter. On the one hand, the getter can be subjected to a relatively uniform clamping force to enhance the fixing effect; on the other hand, the stress caused by temperature changes or other external forces can be relatively evenly distributed to the annular portion 41 to reduce stress concentration.

[0055] Optionally, the thickness a of the annular portion 41 is 0.3-0.5 mm, the width b of the annular portion 41 is 1-3 mm, and the material of the annular portion 41 is Kovar or stainless steel.

[0056] If the thickness a of the annular portion 41 and / or the width b of the annular portion 41 is too large, unnecessary material costs will be increased and too much installation space will be occupied, which is not conducive to reducing the difficulty of operation and miniaturizing the Dewar.

[0057] If the thickness a of the annular portion 41 and / or the width b of the annular portion 41 are too small, on the one hand, the clamping force of the above-mentioned getter fixing ring on the getter will be insufficient; on the other hand, the overall structural strength will be reduced, and under the stress caused by external force, the above-mentioned getter fixing ring will be deformed or even broken.

[0058] Specifically, Kovar is an iron-nickel-cobalt alloy with a thermal expansion coefficient similar to that of glass, and has good welding performance; compared with other alloy materials with similar thermal expansion coefficients, Kovar has a relatively low cost, which helps to reduce the overall manufacturing cost of the above-mentioned getter retaining ring. In addition, Kovar has good corrosion resistance and mechanical strength, and is suitable for Dewar components.

[0059] For example, please refer to Figure 2 The embodiment of the invention shown in the figure provides an adaptive packaging structure of an absorber, comprising a Dewar shell 1, an insulator 2, a absorber 3, and any of the above-mentioned absorber fixing rings 4; the opening portion 43 of the absorber fixing ring 4 is in a clamped state, the annular portion 41 of the absorber fixing ring 4 clamps the absorber 3, and the welding portion 42 of the absorber fixing ring 4 is welded and fixed to the inner surface of the Dewar shell 1; the first electrode 31 of the absorber 3 is welded and fixed to the insulator 2, and the second electrode 32 of the absorber 3 is welded and fixed to the inner surface of the Dewar shell 1.

[0060] It can be understood that the getter adaptive packaging structure provided by the embodiments of the present invention is a part of the Dewar. In other words, the Dewar includes but is not limited to the above-mentioned getter adaptive packaging structure.

[0061] The getter adaptive packaging structure provided by the invention embodiment includes any of the above-mentioned getter fixing rings, and therefore, the getter adaptive packaging structure includes all the technical effects of the corresponding getter fixing ring. Since the technical effects of the corresponding getter fixing ring have been described in detail above, the corresponding technical effects will not be repeated here.

[0062] Optional, see Figures 2 to 4 As shown, the insulator 2 is passed through the Dewar housing 1 .

[0063] It can be understood that penetrating means that an opening is provided on the Dewar housing 1 , the insulator 2 is connected to the opening, and the insulator 2 passes through the inside and outside of the Dewar housing 1 .

[0064] On the one hand, this connection method has better electrical insulation performance; on the other hand, the insulator connected to the dewar shell in a through-laying manner is suitable for dewar shells with different geometric shapes.

[0065] In order to ensure the bonding strength and vacuum airtightness, the insulator 2 may be connected to the opening by brazing.

[0066] For example, Figure 5 It is a schematic structural diagram of the getter 3 , and the getter 3 has a first electrode 31 and a second electrode 32 .

[0067] The first electrode 31 and the second electrode 32 may exist in the form of “electrode wire+electrode wire” or “electrode wire+electrode holder”.

[0068] In practical applications, the getter in the Dewar is generally configured with two electrodes, such as the first electrode 31 and the second electrode 32 as shown above. In order to meet specific needs, technicians may use an electrodeless getter or a getter configured with other numbers of electrodes.

[0069] It is understandable that, in the case where the getter has no electrodes or is configured with other numbers of electrodes, the technician can still use the above-mentioned getter fixing ring provided by the embodiment of the invention, and make corresponding adjustments with reference to the above-mentioned getter adaptive packaging structure to achieve the goal of miniaturization of the dewar. For example, the clamping method of the above-mentioned getter fixing ring on the getter and the welding method of the above-mentioned getter fixing ring and the dewar shell remain unchanged, and according to the number of electrodes of the getter, the connection relationship between the getter and the insulator, and the connection relationship between the getter and the dewar shell are adjusted accordingly.

[0070] It can be understood that although the getter used in the Dewar is generally cylindrical, as long as the non-cylindrical getter has a clampable columnar or annular structure and can be fixed by the getter fixing ring provided by the embodiment of the invention, it can be considered to be packaged using the above-mentioned getter adaptive packaging structure provided by the embodiment of the invention to achieve the goal of miniaturization of the Dewar.

[0071] In addition, Figure 5 The packaging structure of a dewar housing 1+an insulator 2+an getter 3 is shown. The getter adaptive packaging structure provided by the present invention can also be a packaging structure of an insulator 2+multiple getters 3, or multiple insulators 2+multiple getters 3 in a dewar housing 1. The technicians can make corresponding adjustments according to actual needs. Among them, multiple getters 3 can be electrically connected in series or in parallel.

[0072] Please refer to Figure 6 The present invention provides a method for installing a getter adaptive packaging structure, which is applicable to installing any of the above-mentioned getter adaptive packaging structures, and includes:

[0073] Step S101 , welding the welding portion 42 of the getter fixing ring 4 to the inner surface of the Dewar housing 1 .

[0074] Step S102 , passing the getter 3 through the annular portion 41 of the getter fixing ring 4 .

[0075] Step S103 , clamping the opening portion 43 of the getter fixing ring 4 , and welding and fastening both ends of the opening portion 43 so that the annular portion 41 clamps the getter 3 .

[0076] Step S104 , the first electrode 31 of the getter 3 is fixed to the electrode column of the insulator 2 by welding.

[0077] Step S105 , the second electrode 32 of the getter 3 is welded and fixed to the inner surface of the Dewar housing 1 .

[0078] The installation method of the getter adaptive packaging structure provided by the embodiment of the invention is applicable to any of the above-mentioned getter adaptive packaging structures. Therefore, the installation method of the getter adaptive packaging structure includes all the technical effects of the corresponding getter adaptive packaging structure, and the corresponding technical effects will not be repeated here.

[0079] Preferably, in step S101, before welding the welding portion 42 of the getter fixing ring 4 to the inner surface of the Dewar shell 1, the above-mentioned installation method also includes: adjusting the position of the getter fixing ring 4 so that the center of its annular portion 41 is flush with the electrode column of the insulator 2, thereby facilitating determining the welding position of the welding portion 42 of the getter fixing ring 4.

[0080] Optionally, step S101 includes: welding the welding portion 42 of the getter fixing ring 4 to the inner surface of the Dewar housing 1 by resistance welding.

[0081] Among them, resistance welding is a metal connection process that uses the resistance heat generated by the current passing through the metal contact surface to make the metal partially melt or plastically deform, thereby achieving the connection between metal parts. Resistance welding has low cost and high welding efficiency.

[0082] Optionally, in step S102 , after passing the getter 3 through the annular portion 41 of the getter fixing ring 4 , the installation method further comprises: adjusting the position of the getter 3 so that the middle section of the body of the getter 3 corresponds to the annular portion 41 of the getter fixing ring 4 .

[0083] On the one hand, after the opening portion 43 is clamped, the getter 3 can be relatively evenly subjected to the clamping force of the annular portion 41 ; on the other hand, it is helpful to determine the installation position of the getter 3 , and prepare for the subsequent corresponding welding and fixation of the first electrode 31 and the second electrode 32 of the getter 3 .

[0084] Optionally, step S103 includes: clamping the opening 43 of the getter fixing ring 4 with electrode pliers or needle-nosed pliers, and welding and fastening both ends of the opening 43 with resistance welding or laser welding so that the annular portion 41 clamps the getter 3 .

[0085] Among them, electrode pliers and needle-nose pliers are two types of hand tools commonly used in electrical and welding work.

[0086] Laser welding is a welding process that uses a high-energy-density laser beam as a heat source to melt and connect materials together. Laser welding has high welding accuracy.

[0087] Optionally, step S104 includes: overlapping the first electrode 31 of the getter 3 onto the electrode column of the insulator 2, clamping the first electrode 31 and the electrode column of the insulator 2 with an electrode clamp, and spot welding the first electrode 31 and the electrode column of the insulator 2.

[0088] Optionally, step S105 includes: fixing the second electrode 32 of the getter 3 to the inner surface of the Dewar housing 1 by spot welding.

[0089] Among them, spot welding refers to local welding at the contact point of two metal parts to form single or multiple welding spots. Spot welding is a type of resistance welding.

[0090] It should be noted that the term "including" and its variations used in the embodiments of the present invention are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The modifications of "one" and "multiple" mentioned in the embodiments of the present invention are illustrative and not restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more". The descriptions of the terms "first", "second", etc. are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.

[0091] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the embodiments of the present invention are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0092] The various steps described in the method implementation methods provided by the embodiments of the present invention can be performed in different orders and / or in parallel. In addition, the method implementation methods may include additional steps and / or omit the steps shown. The scope of protection of the present invention is not limited in this respect.

[0093] The term "embodiment" in this specification refers to specific features, structures or characteristics described in conjunction with the embodiment that can be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. The various embodiments in this specification are described in a related manner, and the same and similar parts between the various embodiments refer to each other. In particular, for the device, equipment, and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts refer to the partial description of the method embodiment.

[0094] The above-described embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of protection. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A getter fixing ring, characterized in that: It comprises an annular portion (41), a welding portion (42) and an opening portion (43); The width of the annular portion (41) is greater than the thickness of the annular portion (41); The welding portion (42) and the opening portion (43) are both arranged on the annular portion (41), wherein the welding portion (42) is arranged as an outwardly protruding section protruding from the annular portion (41), and the opening portion (43) is arranged as two ends of the annular portion (41) extending outwardly.

2. The getter fixing ring according to claim 1, characterized in that: The annular portion (41) comprises a first annular segment and a second annular segment; The first annular segment is arranged between one end of the welding portion (42) and the opening portion (43), and the second annular segment is arranged between the other end of the welding portion (42) and the opening portion (43); Wherein, the length of the first annular segment is greater than the length of the second annular segment.

3. The getter fixing ring according to claim 2, characterized in that: The opening portion (43) comprises a first extending end and a second extending end; The first extension end is arranged on the first annular segment, the second extension end is arranged on the second annular segment, the first extension end and the second extension end have the same extension length, the extension length is 1-3 mm, and the gap between the first extension end and the second extension end is 0.2-0.5 mm.

4. The getter fixing ring according to claim 1, characterized in that: An edge corner is provided between the welding portion (42) and the annular portion (41), and an edge corner is provided between the annular portion (41) and the opening portion (43), and the R value range of the chamfered R angle of the edge corner is 0.05-0.2 mm.

5. The getter fixing ring according to claim 1, characterized in that: The groove width of the welding portion (42) is 0.5 to 0.7 times the curvature diameter of the getter, and the protruding depth of the welding portion (42) is 0.5 to 1 mm; The contour of the annular portion (41) is concentric with the contour of the bottom surface of the getter, and the curvature of the contour of the annular portion (41) is tangent to the curvature of the contour of the bottom surface of the getter; Wherein, the getter is a cylindrical getter that is preset to be clamped by the annular portion (41).

6. The getter fixing ring according to claim 1, characterized in that: The thickness of the annular portion (41) is 0.3-0.5 mm, and the width of the annular portion (41) is 1-3 mm; the material of the annular portion (41) is Kovar or stainless steel.

7. A getter adaptive packaging structure, characterized in that: It comprises a Dewar housing (1), an insulator (2), a getter (3), and a getter fixing ring (4) as claimed in any one of claims 1 to 6; The opening portion (43) of the getter fixing ring (4) is in a clamped state, the annular portion (41) of the getter fixing ring (4) clamps the getter (3), and the welding portion (42) of the getter fixing ring (4) is welded and fixed to the inner surface of the Dewar housing (1); The first electrode (31) of the getter (3) is fixed to the insulator (2) by welding, and the second electrode (32) of the getter (3) is fixed to the inner surface of the Dewar shell (1) by welding.

8. The getter adaptive packaging structure according to claim 7, characterized in that: The insulator (2) is inserted into the Dewar housing (1).

9. A method for installing a getter adaptive packaging structure, characterized in that: The installation method is applicable to installing the getter adaptive packaging structure according to any one of claims 7 to 8, and the installation method comprises: Welding the welding portion (42) of the getter fixing ring (4) to the inner surface of the Dewar housing (1); Passing the getter (3) through the annular portion (41) of the getter fixing ring (4); Clamping the opening portion (43) of the getter fixing ring (4), and welding and fastening the two ends of the opening portion (43) so that the annular portion (41) clamps the getter (3); Welding and fixing the first electrode (31) of the getter (3) to the electrode column of the insulator (2); The second electrode (32) of the getter (3) is welded and fixed to the inner surface of the Dewar shell (1).

10. The method for installing the getter adaptive packaging structure according to claim 9, characterized in that: Before welding the welding portion (42) of the getter fixing ring (4) to the inner surface of the Dewar housing (1), the installation method further comprises: The position of the getter fixing ring (4) is adjusted so that the center of the annular portion (41) of the getter fixing ring (4) is flush with the electrode column of the insulator (2).

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