Vacuum welding neck lap joint flange with serialized specifications

Abstract

The utility model relates to the technical field of vacuum equipment, in particular to a specification-serialized vacuum welding neck lap joint flange which comprises a center flange, the center flange comprises a neck section and a flange section, a pipe fitting is arranged at the tail end, away from the flange section, of the neck section, the neck section is connected with the pipe fitting in a welded mode, and the flange section is connected with the flange section in a welded mode. And a connecting device and a sealing device are annularly arranged on the side surface of the central flange. According to the central flange provided by the utility model, on the basis of the original national vacuum standard, a series of standard flanges are structurally modified and designed into a series of high-neck lap joint flanges, so that the distance from a welding seam to a sealing surface is lengthened, the deformation influence of welding residual stress on an end surface is reduced, secondary processing is not needed, and the production cost is saved; the welding pipe fitting can also adopt external welding on the basis of internal welding, so that the welding requirement is reduced, the product design and production preparation process is accelerated, and the production efficiency is improved; meanwhile, a standard connecting port is reserved, butt joint with a standard flange on the market can be achieved, and universality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum equipment, in particular to a vacuum high-neck slip-on flange with serialized specifications. Background Art

[0002] Vacuum technology standard flanges are widely used in vacuum industry equipment and are the basic structure for connecting vacuum components with steel pipes and pipe fittings. National standard vacuum flanges are divided into fixed flanges, caliper flanges and slip-on flanges. Among them, internal welding is required when welding caliper flanges to pipelines, which has high requirements on welding methods and workers' welding technology. Especially when encountering parts with small cross-sectional dimensions, internal welding is subject to space restrictions; at the same time, the weld is close to the sealing end face, and the residual stress generated will cause the end face to deform, thereby reducing the sealing effect. In ultra-high vacuum equipment, in order to facilitate detection and reduce weld defects, the weld is required to be on the vacuum side as much as possible, so internal welding needs to be maintained; but for medium and high vacuum equipment, the weld position is not strictly required. The welding method corresponding to the vacuum standard flange will lead to low production efficiency and resources cannot be effectively utilized. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a vacuum high-neck slip-on flange with serialized specifications.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A vacuum high-neck slip-on flange with serialized specifications is designed, comprising a center flange, a through hole is arranged in the middle of the center flange surface, the center flange comprises a neck section and a flange section, a pipe fitting is arranged at the end of the neck section away from the flange section, the neck section and the pipe fitting are welded, and a connecting device and a sealing device are arranged in an annular manner on the side surface of the center flange.

[0006] Preferably, the sealing device comprises a sealing ring, the lower end face of the center flange is processed into a smooth plane, the upper end face of the center flange matched therewith is provided with a sealing ring groove in an annular shape, and the sealing ring is annularly arranged inside the sealing ring groove.

[0007] Preferably, the sealing device comprises a center bracket sealing ring, the inner wall of the flange section is provided with a center bracket sealing ring groove in an annular manner, and the center bracket sealing ring is annularly arranged inside the center bracket sealing ring groove.

[0008] Preferably, the thickness of the neck section gradually decreases from close to the flange section to away from the flange section, and the end size of the neck section away from the flange section is consistent with the pipe fitting.

[0009] Preferably, the connecting device includes a slip-on flange, a wire clamping ring groove is provided in an annular manner on the side of the center flange, a wire clamping ring is provided in an annular manner inside the wire clamping ring groove, the slip-on flange is clamped to the wire clamping ring, and a plurality of bolt holes are provided on the surface of the slip-on flange.

[0010] Preferably, the connecting device includes a slip-on flange including a plurality of caliper bolts, a caliper bolt groove is provided in an annular manner on the lower surface of the flange section, and the upper and lower ends of the plurality of caliper bolts are respectively inserted into the caliper bolt grooves, and the two center flanges are fastened and connected by the caliper bolts.

[0011] Preferably, the flange section (5) extends upward with its head end surface as a reference plane, and its upward extension value is equal to the thickness value of the center bracket sealing ring groove.

[0012] The utility model proposes a series of vacuum high-necked slip-on flanges with the following beneficial effects: a central flange is provided, based on the original national vacuum standard, and a series of standard flange structures are modified and designed into a series of high-necked slip-on flanges, thereby lengthening the distance from the weld to the sealing surface, reducing the deformation influence of welding residual stress on the end face, eliminating the need for secondary processing, and saving production costs; external welding can also be used for welding pipe fittings on the basis of internal welding, thereby reducing welding requirements, speeding up product design and production preparation processes, and improving production efficiency; at the same time, the standard connection port is retained, and docking with standard flanges on the market can be achieved, thereby ensuring universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an overall cross-sectional view of the center flange of the utility model;

[0014] Figure 2 This is the GB6070 vacuum standard flange structure diagram;

[0015] Figure 3 This is a structural diagram of a bolted slip-on flange of the utility model;

[0016] Figure 4 This is a structural diagram of the caliper bolt connection flange of the utility model;

[0017] Figure 5 This is the ISO standard single-sided C-type caliper connection mode of the utility model.

[0018] In the figure: center flange 1, sealing ring groove 2, center bracket sealing ring groove 3, caliper bolt groove 4, flange section 5, wire clamp ring groove 6, neck section 7, pipe fitting 8, wire clamp ring 9, slip-on flange 10, sealing ring 11, caliper bolt 12, center bracket sealing ring 13. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-4 , a vacuum high-neck slip-on flange with serialized specifications, including a center flange 1, a through hole is provided in the middle of the surface of the center flange 1, the center flange 1 includes a neck section 7 and a flange section 5, the diameter specifications of the center flange 1 range from DN10 to DN800, the diameter series and connection dimensions of the center flange 1 are consistent with the vacuum standard flange, and the connection dimensions of the flange section 5 are consistent with the national vacuum standard flange, which can maintain the versatility of connection with standard vacuum equipment products on the market. A pipe fitting 8 is provided at the end of the neck section 7 away from the flange section 5, and the matching pipe fitting 8 can be a steel pipe or a vacuum product pipe fitting. The neck section 7 and the pipe fitting 8 are welded, and external welding can also be used on the basis of internal welding, which solves the problem of space limitation during internal welding and reduces the difficulty of welding; the distance from the weld position to the flange end face is lengthened, which avoids deformation of the flange surface caused by stress concentration, does not require secondary processing, and improves the production efficiency of mass manufacturing. A connecting device and a sealing device are provided in an annular shape on the side surface of the center flange 1.

[0021] The sealing device includes a sealing ring 11. The lower end surface of the center flange 1 is processed into a smooth plane. The upper end surface of the center flange 1 matched therewith is provided with a sealing ring groove 2 in an annular manner. The sealing ring groove 2 can be a rectangular groove, a trapezoidal groove or other structural forms. The sealing ring 11 is annularly arranged inside the sealing ring groove 2. When this form of sealing is adopted, the sealing state is achieved by extruding and deforming the sealing ring 11. This method can be used for flange sealing.

[0022] The sealing device includes a center bracket sealing ring 13, and a center bracket sealing ring groove 3 is annularly provided on the inner wall of the flange section 5. The center bracket sealing ring 13 is annularly arranged inside the center bracket sealing ring groove 3. The sealing state is achieved by extruding and deforming the sealing ring 13 by the center bracket. This method can be used for flange sealing.

[0023] The thickness of the neck section 7 gradually decreases from close to the flange section 5 to away from the flange section 5, and can be transitioned through an inclined surface or an arc, avoiding stress concentration and improving stress discontinuity; the end size of the neck section 7 away from the flange section 5 is consistent with the pipe fitting 8.

[0024] The connecting device includes a slip-on flange 10, a wire clamp groove 6 is provided in an annular manner on the side of the center flange 1, a wire clamp 9 is provided in an annular manner inside the wire clamp groove 6, the slip-on flange 10 is clamped onto the wire clamp 9, a plurality of bolt holes are provided on the surface of the slip-on flange 10, and bolts are passed through the bolt holes to fix the two center flanges 1, and this method can be used for flange connection.

[0025] The connecting device includes a slip-on flange 10 including multiple caliper bolts 12. A caliper bolt groove 4 is provided in an annular manner on the lower surface of the flange section 5. The upper and lower ends of the multiple caliper bolts 12 are respectively inserted into the caliper bolt groove 4. The two center flanges 1 are fastened and connected by the caliper bolts 12. The two center flanges 1 are fixed by the caliper bolts 12 being clamped on the caliper bolt groove 4. This is the second connection method, which can be used for flange connection.

[0026] The thickness of flange section 5 is extended upward with its head end surface as the reference plane based on the original national vacuum standard thickness dimension, and its upward extension value is equal to the thickness value of the center bracket sealing ring groove 3. Figure 2 Taking the DN160 flange as an example, the flange thickness H1 in the national standard is 10mm, the thickness of the center bracket sealing ring groove 3 is 3.9mm, and the corresponding thickness of the flange section of the utility model is designed to be 14mm. Figure 5 The adjusted thickness is compatible with the thickness of the center bracket sealing ring groove 3. When the center bracket sealing ring 13 is not used, the two flange connections can be directly compatible with the ISO standard single-sided C-type caliper connection method.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vacuum high-neck slip-on flange with serialized specifications, comprising a center flange (1), wherein a through hole is provided in the middle of the surface of the center flange (1), characterized in that: The center flange (1) comprises a neck section (7) and a flange section (5); a pipe fitting (8) is provided at the end of the neck section (7) away from the flange section (5); the neck section (7) and the pipe fitting (8) are connected by welding; and a connecting device and a sealing device are provided in an annular shape on the side surface of the center flange (1).

2. A vacuum high-neck slip-on flange with serialized specifications according to claim 1, characterized in that: The sealing device comprises a sealing ring (11), the lower end surface of the center flange (1) is processed into a smooth plane, the upper end surface of the center flange (1) matched therewith is provided with a sealing ring groove (2) in an annular shape, and the sealing ring (11) is arranged in an annular shape inside the sealing ring groove (2).

3. The vacuum high-neck slip-on flange with serialized specifications according to claim 1 is characterized in that: The sealing device comprises a central support sealing ring (13), the inner wall of the flange section (5) is provided with a central support sealing ring groove (3) in an annular shape, and the central support sealing ring (13) is arranged in an annular shape inside the central support sealing ring groove (3).

4. The vacuum high-neck slip-on flange with serialized specifications according to claim 1 is characterized in that: The thickness of the neck section (7) gradually decreases from the direction close to the flange section (5) to the direction away from the flange section (5), and the end size of the neck section (7) away from the flange section (5) is consistent with the pipe fitting (8).

5. The vacuum high-neck slip-on flange with serialized specifications according to claim 1 is characterized in that: The connecting device comprises a slip-on flange (10), a wire clamping ring groove (6) is provided in an annular manner on the side of the center flange (1), a wire clamping ring (9) is provided in an annular manner inside the wire clamping ring groove (6), the slip-on flange (10) is clamped onto the wire clamping ring (9), and a plurality of bolt holes are provided on the surface of the slip-on flange (10).

6. The vacuum high-neck slip-on flange with serialized specifications according to claim 1 is characterized in that: The connecting device includes a slip-on flange (10) including a plurality of caliper bolts (12); a caliper bolt groove (4) is provided in an annular shape on the lower surface of the flange section (5); upper and lower ends of the plurality of caliper bolts (12) are respectively inserted into the caliper bolt groove (4); and the two center flanges (1) are fastened and connected by the caliper bolts (12).

7. The vacuum high-neck slip-on flange with serialized specifications according to claim 3 is characterized in that: The flange section (5) extends upward with its head end surface as a reference plane, and the upward extension value is equal to the thickness value of the center bracket sealing ring groove (3).

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