Observation window glass flange connecting structure

Abstract

The utility model relates to an observation window glass flange connecting structure which comprises a flange ring, a packaging metal ring and a visible glass sheet, a glass sheet embedding groove is formed in the flange ring, and the visible glass sheet is embedded in the glass sheet embedding groove. The top of the flange ring is further provided with a circle of metal ring buckling groove communicated with the glass sheet caulking groove, the outer surface of the visible glass sheet is provided with a circle of glass sheet outer protruding ring, the bottom of the glass sheet caulking groove is provided with anti-skid sealing groove lines, and the bottom of the packaging metal ring is provided with metal ring sealing groove lines. According to the observation window glass flange connecting structure, installation deviation is prevented through the trapezoidal design of the outer protruding ring of the glass sheet, thermal expansion and cold contraction deformation is compensated through the fluted line meshing structure, the contact area and friction force are increased through the wavy or zigzag fluted lines formed by the anti-skid sealing fluted lines and the metal ring sealing fluted lines, and sliding failure of the sealing face is avoided.

Description

Technical Field

[0001] This utility model relates to the field of mechanical sealing technology, specifically to an observation window glass flange connection structure. Background Technology

[0002] A vacuum observation window, also known as a vacuum viewing window, is an optical feedthrough. It is typically used to monitor the production process inside a vacuum container or to transmit light sources. The glass material used to monitor the production process inside a vacuum can be quartz glass or optical glass.

[0003] Existing observation window flange connection structures mostly employ a single sealing method, such as relying solely on rubber gaskets or flat-plate compression seals. These structures are prone to seal failure during long-term use due to material aging, thermal expansion and contraction, or pressure fluctuations, leading to media leakage or the intrusion of external contaminants. Furthermore, if traditional structures are not precisely aligned during installation, localized sealing gaps can easily form, further reducing reliability. Therefore, a new observation window glass flange connection structure is proposed to address these issues by providing a vacuum observation window flange that offers poor sealing performance and convenient installation. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an observation window glass flange connection structure, which has the advantages of enhancing the friction and deformation compensation capabilities of the sealing surface through a continuous wave-shaped or sawtooth pattern design. This solves the problems of insufficient friction in the sealing structure and poor sealing caused by easy deformation due to thermal expansion and contraction.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a glass flange connection structure for an observation window, comprising a flange ring, an encapsulating metal ring, and a viewing glass sheet. The flange ring has a glass sheet recess inside, into which the viewing glass sheet is embedded. The top of the flange ring also has a metal ring engaging groove communicating with the glass sheet recess. The encapsulating metal ring is pressed against the metal ring engaging groove. The outer surface of the viewing glass sheet has a glass sheet convex ring. The bottom of the glass sheet recess has an anti-slip sealing groove. The bottom of the encapsulating metal ring has a metal ring sealing groove. Two rubber pads are provided between the glass sheet convex ring and the anti-slip sealing groove, and between the metal ring sealing groove and the glass sheet convex ring.

[0006] Furthermore, the intersecting surfaces of the visible glass sheet and the outer convex ring of the glass sheet form trapezoidal layers, and the trapezoidal layers respectively have gap fits with the inner ring of the encapsulation metal ring and the bottom inner ring of the flange ring.

[0007] Furthermore, the anti-slip sealing groove and the metal ring sealing groove are wavy or sawtooth continuous patterns, which can generate sufficient friction when the surface of the rubber pad pressed on the anti-slip sealing groove and the metal ring sealing groove comes into contact with the wavy or sawtooth continuous patterns of the anti-slip sealing groove and the metal ring sealing groove. The engagement depth of the anti-slip sealing groove and the metal ring sealing groove is 0.5-1.2mm.

[0008] Furthermore, the flange ring surface is also provided with a plurality of connection limiting holes, which are used to connect the observation window glass flange and the fixing holes of the equipment.

[0009] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0010] The observation window glass flange connection structure uses a trapezoidal design of the outer convex ring of the glass to prevent installation misalignment, a groove interlocking structure to compensate for thermal expansion and contraction deformation, and a wave-shaped or sawtooth groove formed by the anti-slip sealing groove and the metal ring sealing groove to increase the contact area and friction, thus avoiding slippage failure of the sealing surface. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the flange ring structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the visible glass sheet structure of this utility model;

[0014] Figure 4 This is a schematic diagram of the encapsulation metal ring structure of this utility model;

[0015] Figure 5 This is a schematic diagram of the rubber pad structure of this utility model.

[0016] In the diagram: 1. Flange ring; 2. Encapsulating metal ring; 3. Visible glass sheet; 4. Metal ring snap-fit ​​groove; 5. Connection limiting hole; 6. Outer convex ring of glass sheet; 7. Glass sheet recess; 8. Anti-slip sealing groove; 9. Metal ring sealing groove; 10. Rubber pad. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-5 The observation window glass flange connection structure in this embodiment includes a flange ring 1, an encapsulating metal ring 2, and a viewing glass sheet 3. The flange ring 1 has a glass sheet groove 7 inside, and the viewing glass sheet 3 is embedded in the glass sheet groove 7. The top of the flange ring 1 also has a metal ring fastening groove 4 that communicates with the glass sheet groove 7. The encapsulating metal ring 2 is fastened on the metal ring fastening groove 4. The outer surface of the viewing glass sheet 3 is provided with a glass sheet outer protrusion ring 6. The bottom of the glass sheet groove 7 is provided with an anti-slip sealing groove 8. The bottom of the encapsulating metal ring 2 is provided with a metal ring sealing groove 9. Two rubber pads 10 are provided between the glass sheet outer protrusion ring 6 and the anti-slip sealing groove 8, and between the metal ring sealing groove 9 and the glass sheet outer protrusion ring 6.

[0019] In this embodiment, the intersecting surfaces of the visible glass sheet 3 and the outer convex ring 6 of the glass sheet form trapezoidal layers, and the trapezoidal layers respectively have gap fits with the inner ring of the encapsulation metal ring 2 and the bottom inner ring of the flange ring 1.

[0020] In this embodiment, the anti-slip sealing groove 8 and the metal ring sealing groove 9 are wavy or sawtooth continuous patterns, which can generate sufficient friction when the surface of the rubber pad 10 pressed on the anti-slip sealing groove 8 and the metal ring sealing groove 9 comes into contact with the wavy or sawtooth continuous patterns of the anti-slip sealing groove 8 and the metal ring sealing groove 9. The engagement depth of the anti-slip sealing groove 8 and the metal ring sealing groove 9 is 0.5-1.2mm.

[0021] In this embodiment, the flange ring 1 is also provided with a plurality of connection limiting holes 5, which are used to connect the observation window glass flange and the fixing holes of the equipment.

[0022] 1. Install the viewing glass: First, align the outer convex ring 6 of the viewing glass 3 with the glass groove 7 of the flange ring 1, and gently press it in. The trapezoidal cross section provides initial positioning.

[0023] 2. Place rubber pads: Place rubber pads 10 between the outer convex ring 6 of the glass plate and the anti-slip sealing groove 8, and between the metal ring sealing groove 9 and the outer convex ring.

[0024] 3. Fastening the encapsulated metal ring: Align the metal ring sealing groove 9 of the encapsulated metal ring 2 with the anti-slip sealing groove 8, rotate and press to make the wavy or sawtooth pattern tightly interlock.

[0025] 4. Flange fastening: Fix the flange ring 1 to the equipment through the connecting limit hole 5, tighten the bolts to apply preload, and compress the rubber gasket 10 until the groove engagement depth is 0.5-1.2mm to complete the pressure seal.

[0026] 5. Instructions for the process of fastening and sealing the metal ring and welding the flange ring:

[0027] 1. Pre-welding treatment

[0028] • Place the snap-fitted encapsulated metal ring (2) and flange ring (1) in a vacuum fixture to ensure that the concentricity error is ≤0.05mm;

[0029] • Clean the welding surfaces (metal ring fastening groove (4) and outer edge of the encapsulation metal ring (2)) with acetone to remove grease and oxides;

[0030] • Apply a 0.1mm thick anti-oxidation layer (aluminum-silicon alloy powder, melting point 575℃) to the welding area.

[0031] 2. Laser welding parameters

[0032]

[0033] 3. Welding path design ( Figure 4 (As shown by the dashed line)

[0034] • Weld along the outer circumference of the encapsulation metal ring (2) using a spiral trajectory (pitch 0.8mm);

[0035] • The starting and ending points of the arc are staggered from the positions of the connecting limiting holes (5) to avoid stress concentration;

[0036] • Precise control of welding depth: 80% of the thickness of the encapsulation metal ring is melted through (typical value 1.0mm), leaving 20% ​​unmelted layer as an elastic buffer.

[0037] 4. Post-weld treatment

[0038] • Helium mass spectrometry leak detection: The vacuum chamber is pressurized to 2 MPa, and the leakage rate is <1×10⁻⁶. -9 Pa·m 3 / s;

[0039] • Stress relief: Annealing at 250℃ for 2 hours (heating rate 5℃ / min) eliminates >90% of residual stress;

[0040] • Sealing reinforcement: Apply a PTFE coating (50μm thick) to the weld surface to enhance corrosion resistance.

[0041] The working principle of the above embodiments is as follows:

[0042] During the sealing process, the mechanical engagement of the outer convex ring 6 of the glass plate with the groove 7 prevents media penetration; the rubber gasket 10 is deformed under pressure at the groove engagement point, increasing frictional resistance through wavy or sawtooth patterns; the bolt preload further compresses the sealing surface, forming a high-pressure sealing layer. The triple seal works together to block leakage paths, adapting to complex working conditions.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A viewing window glass flange connection structure, comprising a flange ring (1), an encapsulating metal ring (2), and a viewing glass sheet (3), characterized in that: The flange ring (1) has a glass plate groove (7) inside, and the visible glass plate (3) is embedded in the glass plate groove (7). The top of the flange ring (1) also has a metal ring fastening groove (4) that communicates with the glass plate groove (7). The encapsulation metal ring (2) is fastened above the metal ring fastening groove (4). The outer surface of the visible glass plate (3) is provided with a glass plate outer protrusion ring (6). The bottom of the glass plate groove (7) is provided with an anti-slip sealing groove (8). The bottom of the encapsulation metal ring (2) is provided with a metal ring sealing groove (9). Two rubber pads (10) are provided between the glass plate outer protrusion ring (6) and the anti-slip sealing groove (8) and between the metal ring sealing groove (9) and the glass plate outer protrusion ring (6).

2. The observation window glass flange connection structure according to claim 1, characterized in that: The visible glass sheet (3) and the outer convex ring (6) of the glass sheet intersect to form a trapezoidal layer, and the trapezoidal layer is respectively fitted with the inner ring of the encapsulation metal ring (2) and the bottom inner ring of the flange ring (1) with a gap.

3. The observation window glass flange connection structure according to claim 1, characterized in that: The anti-slip sealing groove (8) and the metal ring sealing groove (9) are wavy or sawtooth continuous patterns, which can generate sufficient friction when the surface of the rubber pad (10) pressed on the anti-slip sealing groove (8) and the metal ring sealing groove (9) comes into contact with the wavy or sawtooth continuous patterns of the anti-slip sealing groove (8) and the metal ring sealing groove (9). The engagement depth of the anti-slip sealing groove (8) and the metal ring sealing groove (9) is 0.5-1.2mm.

4. The observation window glass flange connection structure according to claim 1, characterized in that: The flange ring (1) is also provided with a plurality of connection limiting holes (5), which are used to connect the observation window glass flange and the fixing hole of the equipment.

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