CN215000172U - High-hardness build-up welding blind flange - Google Patents
High-hardness build-up welding blind flange Download PDFInfo
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- CN215000172U CN215000172U CN202120810929.6U CN202120810929U CN215000172U CN 215000172 U CN215000172 U CN 215000172U CN 202120810929 U CN202120810929 U CN 202120810929U CN 215000172 U CN215000172 U CN 215000172U
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- blind flange
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- surfacing
- annular boss
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Abstract
The utility model provides a high-hardness surfacing blind flange, which comprises a bottom disc, a hollow cylindrical part arranged on the upper surface of the bottom disc, and a cylindrical surfacing part arranged inside the hollow cylindrical part; the lower end face of the surfacing part is welded with the upper surface of the bottom disc, and the circumferential surface of the surfacing part is connected with the inner surface of the hollow cylindrical part in a surfacing mode; the weld overlay includes a plurality of annular weld overlays. The utility model discloses an inside cavity of flange carries out the build-up welding, and the blind flange central point after the shaping is the build-up welding layer. The whole blind flange has higher hardness, and can meet the requirements of special working environments, such as long-time use under black water medium and under pressure.
Description
Technical Field
The utility model belongs to special flange field, concretely relates to high rigidity build-up welding blind flange.
Background
The flange is a common mechanical part, a part of the flange is provided with a central hole, and the flange without the central hole inside is a blind flange. Flanges are often used in a variety of environments as connectors. Most of the existing flanges are formed by forging. Under special working conditions or environments, such as environments with high pressure, corrosivity and the like and working conditions, the conventional flange is easy to damage and cannot meet requirements.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high rigidity build-up welding blind flange.
The purpose of the utility model is realized with the following mode: a high-hardness surfacing blind flange comprises a bottom disc, a hollow cylindrical part and a cylindrical surfacing part, wherein the hollow cylindrical part is arranged on the upper surface of the bottom disc; the lower end face of the surfacing part is welded with the upper surface of the bottom disc, and the circumferential surface of the surfacing part is connected with the inner surface of the hollow cylindrical part in a surfacing mode; the weld overlay includes a plurality of annular weld overlays.
The upper surface of the bottom plate is provided with an annular boss; the lower end face of the hollow cylindrical part is welded with the upper end face of the annular boss; the height of the annular boss is smaller than that of the hollow cylindrical part; the circumferential surface of the overlaying member is welded to the inner surface of the annular boss and the inner surface of the hollow cylindrical member, respectively.
The axes of the annular boss and the hollow cylindrical member and the bottom disk are collinear; the inner circumferential surface of the annular boss is coplanar with the inner circumferential surface of the hollow cylindrical part; the outer circumferential surface of the annular boss is coplanar with the outer circumferential surface of the hollow cylindrical piece.
The build-up weld is a wear-resistant alloy; hardness of between 35 and 45 HRC; the bottom plate is an A105 low-carbon steel forging; the hollow cylindrical member is 20 carbon steel.
The upper surface of the build-up welding piece is lower than the upper surface of the hollow cylindrical piece.
The utility model has the advantages that: the utility model discloses an inside cavity of flange carries out the build-up welding, and the blind flange central point after the shaping is the build-up welding layer. The whole blind flange has higher hardness, and can meet the requirements of special working environments, such as long-time use under black water medium and under pressure.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a connecting portion of the annular boss and the hollow cylindrical member.
Wherein, 1 is the bottom plate, 2 is the hollow cylinder spare, 3 is the build-up welding spare, 11 is annular boss.
Detailed Description
In the present invention, unless otherwise explicitly specified and limited, technical terms used in the present application shall have the ordinary meaning as understood by those skilled in the art to which the present invention pertains. The terms "connected", "fixed", "arranged" and the like are to be understood in a broad sense, and may be fixedly connected, detachably connected or integrated; can be directly connected or indirectly connected through an intermediate medium; either mechanically or electrically. Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features, or indirectly contacting the first and second features through intervening media. Furthermore, a first feature may be "on" or "over" or "above" a second feature, and the like, may be directly on or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature "under" or "beneath" a second feature may be directly under or obliquely under the first feature or may simply mean that the first feature is at a lesser level than the second feature. Relational terms such as first, second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Terms used in the description such as "center", "lateral", "longitudinal", "length", "width", "thickness", "height", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated.
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings and specific embodiments. As shown in fig. 1-2, a high-hardness surfacing blind flange comprises a bottom disc 1, a hollow cylindrical member 2 arranged on the upper surface of the bottom disc 1, and a cylindrical surfacing member 3 arranged inside the hollow cylindrical member 2; the lower end face of the overlaying piece 3 is welded with the upper surface of the bottom disc 1, and the circumferential surface of the overlaying piece 3 is welded with the inner surface of the hollow cylindrical piece 2; the weld overlay 3 comprises a plurality of annular weld overlays. The bead weld is performed from the inner wall of the hollow cylindrical member 2 until the bead weld becomes a solid bead weld 3. The utility model discloses an inside cavity of blind flange carries out the build-up welding, and the blind flange central point after the shaping is build-up welding piece 3. The whole blind flange has higher hardness, and can meet the requirements of special working environments, such as long-time use under black water medium and under pressure.
Further, the upper surface of the bottom plate 1 is provided with an annular boss 11; the lower end face of the hollow cylindrical part 2 is welded with the upper end face of the annular boss 11; the height of the annular boss 11 is smaller than that of the hollow cylindrical part 2; the circumferential surface of the overlaying member 3 is welded to the inner surface of the annular boss 11 and the inner surface of the hollow cylindrical member 2, respectively. For the structure of the build-up welding inside the large-size blind flange, if the method of integrally forming the blind flange, removing the middle part and then performing the build-up welding is adopted, more materials need to be removed, and great waste is caused. In the utility model, the middle bottom plate 1 is actually a flange with a lower boss height, and after the central part is removed, the boss on the upper part of the middle bottom plate becomes the annular boss 11; then hollow cylinder spare 2 with the welding of annular boss 11, its height equals the utility model discloses the height of blind flange's boss. The mode can effectively reduce the cost and avoid material waste. And the bottom plate 1 and the hollow cylinder 2 can be made of different materials to achieve different hardness, so that the hollow cylinder is suitable for special occasions. In addition, the annular boss 11 and the hollow cylindrical member 2 are welded instead of directly welding the hollow cylindrical member 2 on the upper surface of the bottom disc 1, so that the welding surface is converted from the joint surface of the boss of the blind flange and the bottom disc 1 to the upper surface of the annular boss 11, the area with large diameter change is avoided, and the strength and the hardness of the welding part are ensured.
The axes of the annular boss 11 and the hollow cylindrical member 2 and the bottom disc 1 are collinear; the inner circumferential surface of the annular boss 11 is coplanar with the inner circumferential surface of the hollow cylindrical member 2; the outer circumferential surface of the annular boss 11 is coplanar with the outer circumferential surface of the hollow cylindrical member 2.
The build-up weld 3 is a wear resistant alloy; hardness of between 35 and 45 HRC; the bottom plate 1 is an A105 low-carbon steel forging; the hollow cylindrical member 2 is 20 carbon steel.
The upper surface of the build-up welding member 3 is lower than the upper surface of the hollow cylindrical member 2. Can be used in combination with a pipeline. In a particular embodiment, the height of the weldment 3 may be 100 mm; the overall height of the blind flange is 200 mm; the overall height of the annular boss 11 and the hollow cylindrical member 2 is 150 mm; the outer diameter of the hollow cylindrical member 2 may vary from 100 mm to 1000 mm. For a blind flange with a larger diameter, one month is needed for finishing one surfacing part. When the blind flange of the utility model is processed, the annular boss 11 of the bottom disc 1 and the hollow cylindrical piece 2 are welded firstly; after welding, overlaying is started on the annular boss 11 and the inner surface of the hollow cylindrical part 2 until the blind flange is formed. The full-automatic hot wire TIG welding can be adopted for surfacing; weld overlay hardness 35 to 45 HRC. In the specific implementation: the utility model discloses a during blind flange upper portion stretched into the pipeline, the lower extreme passed through bolted connection with mating flange. Bearing the impact force of slag water under decompression.
The features of the embodiments described above may be arbitrarily combined, and the combination of the features is not contradictory, and should be considered as a range described in the present specification. Without departing from the overall concept of the present invention, the technical solution of the present invention and equivalent replacements or changes, and a plurality of changes and improvements made, should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a high rigidity build-up welding blind flange which characterized in that: the device comprises a bottom disc, a hollow cylindrical part arranged on the upper surface of the bottom disc, and a cylindrical surfacing part arranged inside the hollow cylindrical part; the lower end face of the surfacing part is welded with the upper surface of the bottom disc, and the circumferential surface of the surfacing part is connected with the inner surface of the hollow cylindrical part in a surfacing mode; the weld overlay includes a plurality of annular weld overlays.
2. The high-hardness build-up welding blind flange according to claim 1, characterized in that: the upper surface of the bottom plate is provided with an annular boss; the lower end face of the hollow cylindrical part is welded with the upper end face of the annular boss; the height of the annular boss is smaller than that of the hollow cylindrical part; the circumferential surface of the overlaying member is welded to the inner surface of the annular boss and the inner surface of the hollow cylindrical member, respectively.
3. The high-hardness build-up welding blind flange according to claim 2, characterized in that: the axes of the annular boss and the hollow cylindrical member and the bottom disk are collinear; the inner circumferential surface of the annular boss is coplanar with the inner circumferential surface of the hollow cylindrical part; the outer circumferential surface of the annular boss is coplanar with the outer circumferential surface of the hollow cylindrical piece.
4. The high-hardness build-up welding blind flange according to claim 3, characterized in that: the build-up weld is a wear-resistant alloy; hardness of between 35 and 45 HRC; the bottom plate is an A105 low-carbon steel forging; the hollow cylindrical member is 20 carbon steel.
5. The high-hardness build-up welding blind flange according to claim 3, characterized in that: the upper surface of the build-up welding piece is lower than the upper surface of the hollow cylindrical piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120810929.6U CN215000172U (en) | 2021-04-20 | 2021-04-20 | High-hardness build-up welding blind flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120810929.6U CN215000172U (en) | 2021-04-20 | 2021-04-20 | High-hardness build-up welding blind flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215000172U true CN215000172U (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120810929.6U Active CN215000172U (en) | 2021-04-20 | 2021-04-20 | High-hardness build-up welding blind flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215000172U (en) |
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2021
- 2021-04-20 CN CN202120810929.6U patent/CN215000172U/en active Active
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