Device for correcting flange welding

Abstract

The utility model discloses a device for correcting flange welding, which comprises a first threaded rod, a first semi-ring piece and a second semi-ring piece, the first semi-ring piece and the second semi-ring piece are fixed on the first threaded rod at intervals, through holes with corresponding positions are arranged on the first semi-ring piece and the second semi-ring piece, the first threaded rod penetrates through the through holes, and two ends of the first threaded rod respectively extend out of the first semi-ring piece and the second semi-ring piece. The end, extending out of the first semi-ring piece, of the first threaded rod is provided with an expansion part, the part, extending out of the second semi-ring piece, of the first threaded rod is connected with a nut matched with the expansion part, and an inner threaded cylinder is fixed to the expansion part and is in threaded connection with the second threaded rod. According to the device for correcting flange welding, it is guaranteed that flange holes of two welding flanges are coaxial, the welding flanges and a pipeline are coaxial, and construction efficiency and welding quality are improved.

Description

Technical Field

[0001] The utility model belongs to the field of pipeline welding, and in particular relates to a device for correcting flange welding. Background Art

[0002] Flange connection is a pipeline connection method that uses flanges, gaskets and bolts to fix and seal pipelines, pipe fittings or equipment. After fixing two pipelines, pipe fittings or equipment with flanges, the welding flanges are fastened together with bolts to complete the connection. Flange connection is easy to disassemble and disassemble, has high strength and good sealing performance, and can withstand greater pressure. It is an important connection method for high-pressure pipeline construction and is widely used in the fields of petroleum, chemical industry, natural gas, power stations, metallurgical pipelines, etc. Before two pipelines are connected by flange, the flange needs to be fixed to the pipeline first. The flange and the pipeline are coaxially welded and connected. The two connecting flanges need to be kept on the same axis to ensure the sealing effect and uniform force. However, when welding the flange to the end of the pipeline, it is very easy for the flange to be out of axiality with the welded pipeline, resulting in the two connecting flanges not being on the same axis. In addition, the flange holes are misaligned. The misalignment of the flange holes affects the normal penetration of the bolts into the flange holes, affecting work efficiency. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a device for calibrating flange welding, which ensures that the flange holes of two welding flanges are coaxial, the welding flange is coaxial with the pipeline, and the construction efficiency and welding quality are improved.

[0004] The utility model provides a device for correcting flange welding, which comprises a first threaded rod, a first half ring piece and a second half ring piece fixed on the first threaded rod at intervals, the first half ring piece and the second half ring piece are provided with through holes corresponding to positions, the first threaded rod passes through the through holes and two ends extend from the first half ring piece and the second half ring piece respectively, an enlarged portion is provided at one end of the first threaded rod extending out of the first half ring piece, a nut matching the nut is connected to the part of the first threaded rod extending out of the second half ring piece, an internal threaded barrel is fixed to the enlarged portion, and the internal threaded barrel is threadedly connected to the second threaded rod.

[0005] Furthermore, the shapes of the first half ring segment and the second half ring segment are similar or identical, and the first half ring segment and the second half ring segment are obtained by dividing the welding flange in half, and the distance between the first half ring segment and the second half ring segment can be, for example, 10-30cm, preferably 15-25cm, and the first half ring segment and the second half ring segment are obtained by dividing the DN50 flat welding flange in half.

[0006] Furthermore, the diameter of the circle where the outer ring edge of the first half ring segment is located is consistent with the diameter of the circle where the outer ring edge of the second half ring segment is located.

[0007] Furthermore, the diameter of the circle on which the inner ring edge of the first half ring piece is located is consistent with the diameter of the circle on which the inner ring edge of the second half ring piece is located, and the diameter of the circle on which the inner ring edge of the first half ring piece is located or the diameter of the circle on which the inner ring edge of the second half ring piece is located is consistent with the outer diameter of the pipe. The device of the utility model is placed on the pipe, and the inner ring surfaces of the first half ring piece and the second half ring piece just fit the outer surface of the pipe.

[0008] Furthermore, there are at least two first threaded rods, and the number of the first threaded rods is, for example, the same as the number of the through holes.

[0009] Furthermore, there are at least two through holes, and the distribution positions of the plurality of through holes on the first half ring piece and the second half ring piece are consistent with the positions of the flange holes of the welding flange. Preferably, the through holes are flange holes on the first half ring piece and the second half ring piece. At least two through holes are respectively distributed on both sides of the first half ring piece and the second half ring piece.

[0010] Furthermore, the length of the first threaded rod extending out of the second half ring piece is greater than the sum of the thickness of the welding flange and the thickness of the nut, for example, at most 2-5 cm, preferably 2.5-3.5 cm.

[0011] Further, the internal threaded barrel is coaxial with the first threaded rod, and the length of the internal threaded barrel may be, for example, 3-8 cm, preferably 4-6 cm.

[0012] Furthermore, the sum of the lengths of the second threaded rod and the first threaded rod is greater than the length of the pipe, for example, 5-10 cm greater.

[0013] The utility model discloses a method for using a device for correcting flange welding:

[0014] (1) First, remove the nut from the first threaded rod, remove the second threaded rod from the internal threaded barrel, and place the first half ring piece and the second half ring piece on the pipe, with the first half ring piece located on the right side of the second half ring piece. At this time, the inner ring surfaces of the first half ring piece and the second half ring piece fit the outer surface of the pipe. Move the first half ring piece and the second half ring piece close to the left port of the pipe, take the first welding flange and insert it into the left port of the pipe, and use the second welding flange to raise the right end of the pipe. Adjust the position of the first welding flange so that the first welding flange is flush with the port of the pipe, and move the first welding flange in the direction of the first welding flange. Move the first half ring piece and the second half ring piece to adjust the angle of the device, align the first threaded rod with the flange hole of the first welding flange, pass the first threaded rod through the flange hole and extend out of the first welding flange, the second half ring piece is against the first welding flange, and the nut is screwed into the first threaded rod. After the nut is tightened, the first welding flange is close to the second half ring piece. Since the second half ring piece is coaxial with the pipeline, the first welding flange is coaxial with the pipeline. Spot weld the first welding flange and the pipeline. After welding, remove the nut, take out the first half ring piece and the second half ring piece, and the left end of the pipeline is connected to the first welding flange.

[0015] (2) Place the first half ring piece and the second half ring piece on the pipeline, with the first half ring piece located on the left side of the second half ring piece. Take the second welding flange and insert it into the right end of the pipeline. The first welding flange that has been welded on the left end of the pipeline is raised. Adjust the position of the second welding flange so that the second welding flange is flush with the right end of the pipeline. Move the first half ring piece and the second half ring piece in the direction of the second welding flange. Adjust the angle of the device. Align the first threaded rod with the flange hole of the second welding flange. The first threaded rod passes through the flange hole and extends out of the second welding flange. The second half ring piece is against the second welding flange. The second threaded rod passes through the flange hole of the first welding flange and is screwed into the internal threaded tube. The nut is screwed into the first threaded rod. After the nut is tightened, the second welding flange is close to the second half ring piece. Since the second half ring piece is coaxial with the pipeline, the second welding flange is coaxial with the pipeline. Spot weld the second welding flange and the pipeline. After welding is completed, remove the nut and the second threaded rod, remove the first half ring piece and the second half ring piece, and the right end of the pipeline is connected to the second welding flange.

[0016] Beneficial effects of the utility model:

[0017] The utility model is a device for correcting flange welding. Since the first half ring piece and the second half ring piece are divided in half by the welding flange, when the first half ring piece and the second half ring piece are placed on the pipeline, the inner ring surface of the first half ring piece and the second half ring piece just fits the outer surface of the pipeline. After the nut is tightened, the welding flange is close to the second half ring piece to ensure that the welding flange is coaxial with the pipeline. Since the first threaded rod and the second threaded rod are coaxial, the distribution position of the through holes of the first half ring piece and the second half ring piece corresponds to the position of the flange hole of the welding flange. When the second threaded rod passes through the flange hole of the welding flange and is connected to the internal threaded hole, the flange holes of the welding flanges at both ends of the pipeline are ensured to be coaxial, avoiding the misalignment of the flange holes. The utility model is a device for correcting flange welding. Accurate correction and fixation of the welding flange is achieved, ensuring welding quality and precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram of a device for correcting flange welding.

[0019] Figure 2 The utility model is a schematic diagram of connecting a first welding flange using a device for correcting flange welding of the utility model.

[0020] Figure 3 The utility model is a schematic diagram of connecting a second welding flange using a device for correcting flange welding of the utility model.

[0021] Reference numerals:

[0022] 1-first threaded rod, 2-first half ring piece, 3-second half ring piece, 4-expansion portion, 5-nut, 6-inner threaded cylinder, 7-second threaded rod, 8-pipeline, 9-first welding flange, 10-second welding flange. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] like Figure 1 As shown, the utility model provides a device for correcting flange welding, which includes a first threaded rod 1, a first half ring piece 2 and a second half ring piece 3 fixed on the first threaded rod 1 at intervals, the first half ring piece 2 and the second half ring piece 3 are provided with through holes corresponding to the positions, the first threaded rod 1 passes through the through holes and the two ends extend out from the first half ring piece 2 and the second half ring piece 3 respectively, an enlarged portion 4 is provided at the end of the first threaded rod 1 extending out of the first half ring piece 2, the part of the first threaded rod 1 extending out of the second half ring piece 3 is connected with a nut 5 adapted thereto, an internal threaded barrel 6 is fixed to the enlarged portion 4, and the internal threaded barrel 6 is threadedly connected to the second threaded rod 7.

[0026] The first half ring segment 2 and the second half ring segment 3 have the same or similar shapes. The first half ring segment 2 and the second half ring segment 3 are obtained by dividing the welding flange in half. The distance between the first half ring segment 2 and the second half ring segment 3 can be, for example, 10-30 cm, preferably 15-25 cm. The first half ring segment 2 and the second half ring segment 3 are obtained by dividing the DN50 flat welding flange in half.

[0027] The diameter of the circle where the outer ring edge of the first half ring segment 2 is located is consistent with the diameter of the circle where the outer ring edge of the second half ring segment 3 is located.

[0028] The diameter of the circle where the inner ring edge of the first half ring segment 2 is located is consistent with the diameter of the circle where the inner ring edge of the second half ring segment 3 is located. The diameter of the circle where the inner ring edge of the first half ring segment 2 is located or the diameter of the circle where the inner ring edge of the second half ring segment 3 is located is consistent with the outer diameter of the pipe 8. The device of the utility model is placed on the pipe 8, and the inner ring surfaces of the first half ring segment 2 and the second half ring segment 3 just fit the outer surface of the pipe 8.

[0029] There are at least two first threaded rods 1, and the number of the first threaded rods 1 is, for example, the same as the number of the through holes. In a specific application, since there are at least two first threaded rods 1, the firmness of the connection between the second half ring piece 3 and the welding flange is enhanced.

[0030] There are at least two through holes, and the distribution positions of the multiple through holes on the first half ring segment 2 and the second half ring segment 3 are consistent with the positions of the corresponding flange holes of the welding flange. Preferably, the through holes are flange holes on the first half ring segment 2 and the second half ring segment 3, for example, two through holes are respectively distributed on both sides of the first half ring segment and the second half ring segment, and correspond to two of the flange holes of the welding flange. In a specific application, since the distribution positions of the multiple through holes on the first half ring segment 2 and the second half ring segment 3 are consistent with the positions of the flange holes of the welding flange, the flange holes of the welding flange are ensured to be coaxial.

[0031] The length of the first threaded rod 1 extending out of the second half ring piece 3 is greater than the sum of the thickness of the welding flange and the thickness of the nut 5, for example, is 2-5 cm, preferably 2.5-3.5 cm. In specific applications, since the length of the first threaded rod 1 extending out of the second half ring piece 3 is greater than the sum of the thickness of the welding flange and the thickness of the nut 5, it is ensured that the nut 5 is normally screwed into the first threaded rod 1.

[0032] The internal threaded barrel 6 is coaxial with the first threaded rod 1 , and the length of the internal threaded barrel 6 can be, for example, 3-8 cm, preferably 4-6 cm. In specific applications, since the internal threaded barrel 6 is coaxial with the first threaded rod 1 , when the second threaded rod 7 is screwed into the internal threaded barrel 6 , the first threaded rod 1 and the second threaded rod 7 are ensured to be coaxial.

[0033] The sum of the lengths of the second threaded rod 7 and the first threaded rod 1 is greater than the length of the pipe 8, for example, 5-10 cm greater. In specific applications, since the sum of the lengths of the second threaded rod 7 and the first threaded rod 1 is greater than the length of the pipe 8, the first threaded rod 1 and the second threaded rod 7 can position the welding flanges at both ends of the pipe 8.

[0034] The utility model discloses a method for using a device for correcting flange welding:

[0035] (1) If Figure 2As shown, first remove the nut 5 from the first threaded rod 1, remove the second threaded rod 7 from the internal threaded barrel 6, place the first half ring segment 2 and the second half ring segment 3 on the pipe 8, the first half ring segment 2 is located on the right side of the second half ring segment 3, at this time, the inner ring surface of the first half ring segment 2 and the second half ring segment 3 fits the outer surface of the pipe 8, move the first half ring segment 2 and the second half ring segment 3 to make them close to the left port of the pipe 8, take the first welding flange 9 and insert it into the left port of the pipe 8, the right end of the pipe 8 is raised by using the second welding flange 10, adjust the position of the first welding flange 9 so that the first welding flange 9 is flush with the port of the pipe 8, and move the first welding flange 9 to the left side of the pipe 8. Move the first half ring piece 2 and the second half ring piece 3 to adjust the angle of the device, align the first threaded rod 1 with the flange hole of the first welding flange 9, the first threaded rod 1 passes through the flange hole and extends out of the first welding flange 9, the second half ring piece 3 is against the first welding flange 9, the nut 5 is screwed into the first threaded rod 1, after the nut 5 is tightened, the first welding flange 9 is close to the second half ring piece 3, because the second half ring piece 3 is coaxial with the pipeline 8, so the first welding flange 9 is coaxial with the pipeline 8, spot weld the first welding flange 9 and the pipeline 8, after welding, remove the nut 5, take out the first half ring piece 2 and the second half ring piece 3, and the left end of the pipeline 8 is connected with the first welding flange 9;

[0036] (2) If Figure 3 As shown, the first half ring piece 2 and the second half ring piece 3 are placed on the pipe 8, the first half ring piece 2 is located on the left side of the second half ring piece 3, the second welding flange 10 is taken and inserted into the right end of the pipe 8, the first welding flange 9 welded on the left end of the pipe 8 is raised, the position of the second welding flange 10 is adjusted so that the second welding flange 10 is flush with the right end of the pipe 8, the first half ring piece 2 and the second half ring piece 3 are moved toward the direction of the second welding flange 10, the angle of the device is adjusted, the first threaded rod 1 is aligned with the flange hole of the second welding flange 10, the first threaded rod 1 passes through the flange hole and extends out of the first threaded rod 1. Second welding flange 10, the second half ring piece 3 is against the second welding flange 10, the second threaded rod 7 passes through the flange hole of the first welding flange 9 and is screwed into the internal threaded tube 6, the nut 5 is screwed into the first threaded rod 1, after the nut 5 is tightened, the second welding flange 10 is close to the second half ring piece 3, since the second half ring piece 3 is coaxial with the pipe 8, the second welding flange 10 is coaxial with the pipe 8, the second welding flange 10 and the pipe 8 are spot welded, after welding, the nut 5 and the second threaded rod 7 are removed, the first half ring piece 2 and the second half ring piece 3 are removed, and the right end of the pipe 8 is connected to the second welding flange 10.

[0037] The above describes the preferred embodiments of the present invention, however, the above description is not intended to be limiting. A person skilled in the art may make many changes or modifications to the present invention without departing from the spirit and scope of the present invention. The changes or modifications should be included in the scope of the appended claims.

Claims

1. A device for correcting flange welding, characterized in that: The invention comprises a first threaded rod (1), a first half ring piece (2) and a second half ring piece (3) fixed to the first threaded rod (1) at intervals, the first half ring piece (2) and the second half ring piece (3) being provided with through holes corresponding to the positions, the first threaded rod (1) passing through the through holes and having two ends extending out of the first half ring piece (2) and the second half ring piece (3) respectively, an enlarged portion (4) being provided at one end of the first threaded rod (1) extending out of the first half ring piece (2), a nut (5) matching the nut being connected to the portion of the first threaded rod (1) extending out of the second half ring piece (3), an internal threaded barrel (6) being fixed to the enlarged portion (4), and the internal threaded barrel (6) being threadedly connected to the second threaded rod (7).

2. The device for correcting flange welding according to claim 1, characterized in that: The first half ring piece (2) and the second half ring piece (3) are similar in shape, and the first half ring piece (2) and the second half ring piece (3) are obtained by dividing the welding flange in half.

3. The device for correcting flange welding according to claim 1 or 2, characterized in that: The diameter of the circle where the outer ring edge of the first half ring piece (2) is located is consistent with the diameter of the circle where the outer ring edge of the second half ring piece (3) is located.

4. The device for correcting flange welding according to claim 3, characterized in that: The diameter of the circle on which the inner ring edge of the first half ring segment (2) is located is consistent with the diameter of the circle on which the inner ring edge of the second half ring segment (3) is located, and the diameter of the circle on which the inner ring edge of the first half ring segment (2) is located or the diameter of the circle on which the inner ring edge of the second half ring segment (3) is located is consistent with the outer diameter of the pipe (8).

5. The device for correcting flange welding according to claim 1, characterized in that: There are at least two first threaded rods (1), and the number of the first threaded rods (1) is the same as the number of the through holes.

6. The device for correcting flange welding according to claim 1 or 5, characterized in that: There are at least two through holes, and the distribution positions of the plurality of through holes on the first half ring piece (2) and the second half ring piece (3) are consistent with the positions of the flange holes of the welding flange.

7. The device for correcting flange welding according to claim 1 or 5, characterized in that: The length of the first threaded rod (1) extending out of the second half ring piece (3) is greater than the sum of the thickness of the welding flange and the thickness of the nut (5).

8. The device for correcting flange welding according to claim 1, characterized in that: The internal threaded cylinder (6) is coaxial with the first threaded rod (1).

9. The device for correcting flange welding according to claim 1, characterized in that: The sum of the lengths of the second threaded rod (7) and the first threaded rod (1) is greater than the length of the pipe (8).

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