Wear resistant hardfacing flange

Abstract

The utility model provides a kind of wear-resistant surfacing flange, it is related to surfacing flange technical field, solve the problem that the flange in surfacing now appears error and is replaced to cause higher cost, including flange body, the flange body includes the connecting end and welding end connected with each other, channel is set up on the connecting end, the welding end includes connecting pipe and the extension part being arranged at the edge of connecting pipe, the diameter of channel and the outer diameter of connecting pipe are same, channel is provided with placing groove, the placing groove and extension part are matched, the extension part is in placing groove, it is fixed between the extension part and placing groove by bolt, the inner wall of connecting pipe is provided with wear-resistant layer. The device adopts the connecting end and welding end of split, even if welding end surfacing error, just replace new welding end and carry out surfacing, improve practicality.

Description

Technical Field

[0001] This utility model belongs to the field of overlay flange technology, and more specifically, it relates to an wear-resistant and corrosion-resistant overlay flange. Background Technology

[0002] Flanges are mechanical components used to connect equipment such as pipes, valves, pumps, and containers, serving functions of connection, sealing, support, and easy disassembly. They achieve sealing through the combined action of bolts, gaskets, and flanges. There are various types, including flat-welded, butt-welded, and threaded connections, and materials encompassing carbon steel, stainless steel, and others. They are widely used in industries such as petroleum, chemical, and power. To improve the wear and corrosion resistance of flanges, a welding overlay process is often used.

[0003] Based on the above, the inventors have discovered the following problem: current flanges are usually integral structures, and welding errors may occur during the welding process, requiring the replacement of other flanges, which is costly.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a wear-resistant and corrosion-resistant weld overlay flange in order to achieve a more practical value. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a wear-resistant and corrosion-resistant weld overlay flange, thereby solving the problem of high costs associated with replacing flanges due to errors during the weld overlay process.

[0006] The purpose and effect of this wear-resistant and corrosion-resistant weld overlay flange are achieved by the following specific technical means: A wear-resistant weld overlay flange includes a flange body, the flange body including a connecting end and a welding end connected to each other, the connecting end having a channel, the welding end including a connecting pipe and an extension disposed on the edge of the connecting pipe, the diameter of the channel being the same as the outer diameter of the connecting pipe, the channel having a placement groove provided thereon, the placement groove matching the extension, the extension being located within the placement groove, the extension and the placement groove being fixed together by bolts, and the inner wall of the connecting pipe having a wear-resistant layer.

[0007] Furthermore, the extension has multiple threaded holes that do not penetrate the extension. The connecting end has a corresponding through hole that extends into the placement groove. The bolt passes through the through hole and rotates into the threaded hole. The head of the bolt is located on the same side as the connecting pipe.

[0008] Furthermore, an annular sealing ring is provided between the placement groove and the extension.

[0009] Furthermore, the wear-resistant layer includes a transition layer and an alloy layer welded to the surface of the transition layer.

[0010] Furthermore, the transition layer is made of ER308L stainless steel welding wire.

[0011] Furthermore, the alloy layer is made of ERNiCrMo-3 welding wire.

[0012] Furthermore, 6-12 mounting holes are evenly opened circumferentially on the outer peripheral wall of the connecting end, and the inner wall of the mounting holes is coated with an epoxy resin anti-corrosion coating with a thickness of 0.1-0.2mm.

[0013] Compared with the prior art, the present invention has the following beneficial effects: When using this utility model, a wear-resistant layer can be first welded onto the inner wall of the connecting pipe. After the welding is completed, the connecting pipe at the welded end is inserted into the channel. At this time, the extension is located in the placement groove, and the welded end is fixed by bolts. Through the above design, the connecting end and the welding end are separate. Even if the welding end is welded incorrectly, only a new welding end needs to be replaced for welding, which improves the practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an wear-resistant and corrosion-resistant weld overlay flange according to this utility model.

[0015] Figure 2 This is a schematic diagram of the assembly of a wear-resistant and corrosion-resistant weld overlay flange according to this utility model.

[0016] Figure 3 This is a schematic diagram showing the location of the threaded hole in a wear-resistant and corrosion-resistant weld overlay flange according to this utility model.

[0017] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Flange body; 101. Connecting end; 102. Welding end; 1021. Connecting pipe; 1022. Extension; 2. Mounting hole; 3. Channel; 4. Placement slot; 5. Bolt; 6. Wear-resistant layer; 601. Transition layer; 602. Alloy layer; 7. Threaded hole; 8. Through hole; 9. Annular sealing ring. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0019] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] As attached Figure 1 To be continued Figure 3 As shown: This utility model provides a wear-resistant and corrosion-resistant weld overlay flange, including a flange body 1. The flange body 1 includes a connecting end 101 and a welding end 102 that are connected to each other. The connecting end 101 is used to connect with another flange body 1, and the welding end 102 is used to weld to a pipeline. 6-12 mounting holes 2 are evenly opened circumferentially on the outer peripheral wall of the connecting end 101, and the inner wall of the mounting holes 2 is coated with an epoxy resin anti-corrosion coating with a thickness of 0.1-0.2 mm.

[0022] The connecting end 101 has a channel 3, and the welding end 102 includes a connecting pipe 1021 and an extension 1022 disposed on the edge of the connecting pipe 1021. The diameter of the channel 3 is the same as the outer diameter of the connecting pipe 1021. The channel 3 is provided with a placement groove 4, which matches the extension 1022. The extension 1022 is located in the placement groove 4. The extension 1022 and the placement groove 4 are fixed together by bolts 5. The inner wall of the connecting pipe 1021 is provided with a wear-resistant layer 6.

[0023] When in use, the wear-resistant layer 6 can be welded onto the inner wall of the connecting pipe 1021 first. After the welding is completed, the connecting pipe 1021 of the welding end 102 is inserted into the channel 3. At this time, the extension 1022 is located in the placement groove 4. Then, the welding end 102 is fixed by the bolt 5. With the above design, the connecting end 101 and the welding end 102 are separate. Even if the welding end 102 is welded incorrectly, only a new welding end 102 needs to be replaced for welding, which improves the practicality.

[0024] The extension 1022 has multiple threaded holes 7, which do not penetrate the extension 1022. The connecting end 101 has a corresponding through hole 8, which extends into the placement groove 4. The bolt 5 passes through the through hole 8 and is turned into the threaded hole 7. The head of the bolt 5 is located on the same side as the connecting pipe 1021. Through the above design, the bolt 5 can be located outside the flange body 1, thereby avoiding corrosion by the internal liquid.

[0025] An annular sealing ring 9 is also provided between the placement groove 4 and the extension 1022 to improve the sealing performance.

[0026] The wear-resistant layer 6 includes a transition layer 601 and an alloy layer 602 welded to the surface of the transition layer 601. The transition layer 601 is made of ER308L stainless steel welding wire and is deposited by gas metal arc welding with a welding current of 180-200A, a voltage of 22-24V, and a deposit thickness of 1.5mm. After welding, it is subjected to stress relief treatment at 200℃ for 1h. 304L has good fluidity and can fill small defects on the surface of the substrate, avoiding the problems of porosity and slag inclusion caused by the large difference between the substrate and the alloy material when directly depositing the weld.

[0027] The alloy layer 602 is welded using ERNiCrMo-3 welding wire and MIG welding. The welding current is 160-180A, the voltage is 20-22V, the weld thickness is 4mm, and the surface roughness is reduced to Ra=0.6μm after welding by grinding with a grinding wheel. The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A wear-resistant and corrosion-resistant weld overlay flange, comprising a flange body (1), characterized in that: The flange body (1) includes a connecting end (101) and a welding end (102) connected to each other. The connecting end (101) has a channel (3). The welding end (102) includes a connecting pipe (1021) and an extension (1022) provided on the edge of the connecting pipe (1021). The diameter of the channel (3) is the same as the outer diameter of the connecting pipe (1021). The channel (3) is provided with a placement groove (4). The placement groove (4) and the extension (1022) are matched. The extension (1022) is located in the placement groove (4). The extension (1022) and the placement groove (4) are fixed by bolts (5). The inner wall of the connecting pipe (1021) is provided with a wear-resistant layer (6).

2. The wear-resistant and corrosion-resistant weld overlay flange as described in claim 1, characterized in that: The extension (1022) has multiple threaded holes (7), which do not penetrate the extension (1022). The connecting end (101) has a corresponding through hole (8), which extends into the placement groove (4). The bolt (5) passes through the through hole (8) and rotates into the threaded hole (7). The head of the bolt (5) is located on the same side as the connecting pipe (1021).

3. The wear-resistant and corrosion-resistant weld overlay flange as described in claim 2, characterized in that: An annular sealing ring (9) is also provided between the placement groove (4) and the extension (1022).

4. The wear-resistant and corrosion-resistant weld overlay flange as described in claim 1, characterized in that: The wear-resistant layer (6) includes a transition layer (601) and an alloy layer (602) welded to the surface of the transition layer (601).

5. The wear-resistant and corrosion-resistant weld overlay flange as described in claim 4, characterized in that: The transition layer (601) is made of ER308L stainless steel welding wire.

6. The wear-resistant and corrosion-resistant weld overlay flange as described in claim 4, characterized in that: The alloy layer (602) is made of ERNiCrMo-3 welding wire.

7. The wear-resistant and corrosion-resistant weld overlay flange as described in claim 1, characterized in that: The outer peripheral wall of the connecting end (101) has 6-12 mounting holes (2) evenly opened along the circumference, and the inner wall of the mounting holes (2) is coated with an epoxy resin anti-corrosion coating with a thickness of 0.1-0.2mm.

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