Non-magnetic quartz observation window

Abstract

A mounting opening is arranged on a mounting flange, a mounting step extending along the inner edge of the mounting opening is formed on one side of the mounting opening, a transition ring extends along the inner edge of the mounting step, and quartz glass is positioned on the mounting step and is fixedly welded with the mounting flange through the transition ring. And the quartz glass is welded and fixed at the mounting step of the mounting flange through the transition ring, so that vacuum sealing is realized, sealing materials with poor irradiance such as rubber are effectively replaced, and the device is suitable for ultrahigh vacuum, strong magnetic and irradiation environments such as accelerators, strong magnetic fields, magnetic confinement fusion and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of strong magnetism, in particular to a non-magnetic quartz observation window. Background Art

[0002] Traditional quartz observation windows use either rubber rings or Kovar alloy sealing technology to achieve a vacuum seal. Rubber rings offer the lowest cost, but due to the high outgassing rate of the rubber ring material, they are not suitable for use in ultra-high vacuum environments. Vacuum sealing rubber rings also have poor radiation resistance and are not suitable for use in irradiated environments. Kovar alloy and quartz sealing technology is relatively mature and is often used in ultra-high vacuum and irradiated environments. However, due to the magnetic nature of Kovar alloy, it cannot be used in environments with high requirements for the material's magnetic permeability. Therefore, in strong magnetic environments such as accelerators, strong magnetic fields, and magnetic confinement fusion, where low magnetic permeability materials and radiation resistance are required, neither rubber ring sealing nor Kovar alloy sealing technologies meet the requirements. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model proposes a non-magnetic quartz observation window.

[0004] The utility model provides a non-magnetic quartz observation window, comprising: quartz glass, a mounting flange and a transition ring;

[0005] A mounting opening is provided on the mounting flange, and a mounting step extending along the inner edge of the mounting opening is formed on one side of the mounting opening. A transition ring extends along the inner edge of the mounting step. The quartz glass is located on the junction of the mounting step and is welded and fixed to the mounting flange through the transition ring.

[0006] Preferably, the transition ring has a side ring portion and an end ring portion extending along an inner wall of one end of the side ring portion, the end ring portion abuts against the mounting step, and the quartz glass abuts against the end ring portion.

[0007] Preferably, the inner radial direction of the side ring portion decreases toward the end ring portion.

[0008] Preferably, the quartz glass is provided with an annular sealing area cooperating with the transition ring, and the annular sealing area has an arc-shaped cross-section.

[0009] Preferably, the mounting flange is made of titanium or a titanium alloy material, and the transition ring is made of titanium or a titanium alloy material.

[0010] Preferably, the mounting flange and the transition ring are sealed by fusion welding, and the quartz glass and the transition ring are connected by furnace brazing.

[0011] Preferably, an annular sealing area cooperating with the transition ring is provided on the quartz glass, and the annular sealing area is metallized.

[0012] Preferably, a first metal layer, a second metal layer and a third metal layer are sequentially provided on the annular sealing area, the first metal layer is made of titanium, the second metal layer is made of molybdenum or copper, and the third metal layer is made of nickel.

[0013] Preferably, the thickness of the first metal layer is 80-160 nm, the thickness of the second metal layer is 150-250 nm, and the thickness of the third metal layer is 5-10 um.

[0014] Preferably, a stress relief groove is provided on a side of the mounting flange close to the mounting step.

[0015] The non-magnetic quartz observation window proposed in this utility model has a mounting opening on a mounting flange. A mounting step is formed on one side of the mounting opening, extending along the inner edge of the mounting opening. A transition ring extends along the inner edge of the mounting step. A quartz glass is positioned at the junction of the mounting step and welded to the mounting flange via the transition ring. The quartz glass is welded to the mounting step of the mounting flange via the transition ring, achieving a vacuum seal and effectively replacing sealing materials with poor radiation resistance, such as rubber. It is suitable for use in ultra-high vacuum, strong magnetic, and radiation-exposed environments, such as accelerators, high magnetic fields, and magnetic confinement fusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of an implementation method of a non-magnetic quartz observation window proposed by the utility model.

[0017] Figure 2 This is a schematic structural diagram of a transition ring in one embodiment of a non-magnetic quartz observation window proposed in the present invention.

[0018] Figure 3 This is a schematic structural diagram of quartz glass in one embodiment of a non-magnetic quartz observation window proposed in the present invention.

[0019] Figure 4 This is a schematic diagram of the partial cooperation between the transition ring and the mounting flange in one embodiment of a non-magnetic quartz observation window proposed by the present invention. DETAILED DESCRIPTION

[0020] like Figures 1 to 4 As shown, Figure 1 This is a structural diagram of an embodiment of a non-magnetic quartz observation window proposed in the utility model. Figure 2 This is a structural diagram of a transition ring in one embodiment of a non-magnetic quartz observation window proposed in the present invention. Figure 3 This is a schematic structural diagram of quartz glass in one embodiment of a non-magnetic quartz observation window proposed in the present invention. Figure 4 This is a schematic diagram of the partial cooperation between the transition ring and the mounting flange in one embodiment of a non-magnetic quartz observation window proposed by the present invention.

[0021] Reference Figure 1 The utility model proposes a non-magnetic quartz observation window, comprising: quartz glass 1, a mounting flange 3 and a transition ring 2;

[0022] A mounting opening is provided on the mounting flange 3, and a mounting step extending along the inner edge of the mounting opening is formed on one side of the mounting opening. The transition ring 2 extends along the inner edge of the mounting step. The quartz glass 1 is located on the junction of the mounting step and is welded to the mounting flange 3 through the transition ring 2.

[0023] In this embodiment, the proposed non-magnetic quartz observation window features a mounting opening on a mounting flange. A mounting step is formed on one side of the mounting opening, extending along the inner edge of the opening. A transition ring extends along the inner edge of the mounting step. A quartz glass member is positioned at the junction of the mounting step and welded to the mounting flange via the transition ring. The quartz glass is welded to the mounting step of the mounting flange via the transition ring, achieving a vacuum seal and effectively replacing sealing materials with poor radiation resistance, such as rubber. This makes it suitable for ultra-high vacuum, strong magnetic, and radiation-exposed environments, such as accelerators, high magnetic fields, and magnetic confinement fusion.

[0024] Reference Figure 2 In the specific design of the transition ring, the transition ring 2 includes a side ring portion 21 and an end ring portion 22 extending along the inner wall of one end of the side ring portion 21. The end ring portion 22 abuts the mounting step, and the quartz glass 1 abuts against the end ring portion 22. This ensures that the transition ring and the quartz glass 1 fit together through the L-shaped cross-section, ensuring reliable adhesion between the two. Furthermore, the inner diameter of the side ring portion 21 decreases toward the end ring portion 22.

[0025] Reference Figure 3 To accommodate the L-shaped weld zone, the quartz glass 1 is provided with an annular sealing region 11 that mates with the transition ring 2. This annular sealing region 11 has an arcuate cross-section. The quartz glass has a light transmittance greater than 95% and a purity greater than 99.99%. In the specific design of the annular sealing region, end-face sealing is used for portions where the quartz sealing surface mates with the end ring for diameters less than 150 mm. Cylindrical sealing is used for portions where the quartz glass mates with the side ring for diameters greater than 150 mm.

[0026] In the specific material selection of this embodiment, the mounting flange 3 is made of titanium or titanium alloy material, 304, 316L or other stainless steel materials, and the transition ring 2 is made of the same material as the mounting flange 3. During the welding process, the mounting flange 3 and the transition ring 2 are sealed by fusion welding. Specifically, gas shielded fusion welding such as argon arc welding and laser welding can be used for sealing. The weld is vacuum leak tested using a helium mass spectrometer, and the helium leak rate is less than 1x10 -11 Pam 3 / s. The quartz glass 1 and the transition ring 2 are connected by furnace brazing. Specifically, AgCu, Ti-Zr-Cu-N, AgCuNi and other solders can be used to achieve sealing. The brazing welds are vacuum leak tested using a helium mass spectrometer, and the helium leak rate is less than 1x10 -11 Pam 3 / s.

[0027] During welding, the quartz glass 1 is provided with an annular sealing region 11 that mates with the transition ring 2. Prior to welding, the annular sealing region 11 is metallized. A first metal layer and a second metal layer are sequentially provided on the annular sealing region 11. The first metal layer is made of titanium, and the second metal layer is made of molybdenum or copper.

[0028] During the metallization process for quartz glass, first remove oil and stains from the surface and ultrasonically clean the glass. Then, a protective film is applied to the non-metallized area. Specifically, the sealing area is plated with titanium using a magnetron sputtering device to a thickness of 80-160nm; the sealing area is plated with molybdenum or copper using a magnetron sputtering device to a thickness of 150-250nm; and the sealing area is electroplated with nickel to a thickness of 5-10μm.

[0029] The transition ring is made of titanium or titanium alloy, 304, 316L and other stainless steel materials, with a thickness of 0.5mm-1mm.

[0030] Reference Figure 4 In other specific embodiments, a stress relief groove 31 is provided on the side of the mounting flange 3 close to the mounting step. The stress relief groove is provided close to the transition ring, with a groove size of 2mmx2mm, and a welding edge width that is the same as the thickness of the transition ring, 0.5mm-1mm.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A non-magnetic quartz observation window, characterized in that: include: Quartz glass (1), mounting flange (3) and transition ring (2); A mounting opening is provided on the mounting flange (3), a mounting step extending along the inner edge of the mounting opening is formed on one side of the mounting opening, a transition ring (2) extends along the inner edge of the mounting step, and the quartz glass (1) is located on the junction of the mounting step and is welded and fixed to the mounting flange (3) via the transition ring (2); The transition ring (2) comprises a side ring portion (21) and an end ring portion (22) extending along the inner wall of one end of the side ring portion (21); the end ring portion (22) abuts against the mounting step; and the quartz glass (1) abuts against the end ring portion (22).

2. The non-magnetic quartz observation window according to claim 1, characterized in that: The inner diameter of the side ring portion (21) decreases toward the end ring portion (22).

3. The non-magnetic quartz observation window according to claim 1, characterized in that: An annular sealing area (11) cooperating with a transition ring (2) is provided on the quartz glass (1), and the annular sealing area (11) has an arc-shaped cross section.

4. The non-magnetic quartz observation window according to claim 1, characterized in that: The mounting flange (3) is made of titanium or a titanium alloy material, and the transition ring (2) is made of titanium or a titanium alloy material.

5. The non-magnetic quartz observation window according to claim 4, characterized in that: The mounting flange (3) and the transition ring (2) are sealed by fusion welding, and the quartz glass (1) and the transition ring (2) are connected by furnace brazing.

6. The non-magnetic quartz observation window according to claim 4, characterized in that: An annular sealing area (11) cooperating with a transition ring (2) is provided on the quartz glass (1), and the annular sealing area (11) is metallized.

7. The non-magnetic quartz observation window according to claim 6, characterized in that: The annular sealing area (11) is provided with a first metal layer, a second metal layer and a third metal layer in sequence, the first metal layer is made of titanium, the second metal layer is made of molybdenum or copper, and the third metal layer is made of nickel.

8. The non-magnetic quartz observation window according to claim 7, characterized in that: The thickness of the first metal layer is 80-160 nm, the thickness of the second metal layer is 150-250 nm, and the thickness of the third metal layer is 5-10 μm.

9. The non-magnetic quartz observation window according to claim 1, characterized in that: A stress relief groove (31) is provided on one side of the mounting flange (3) close to the mounting step.

Images