Clamping device and method for short pipe-non-standard elbow pipe fitting welding

Abstract

The invention discloses a clamping device and method for welding of a short pipe-non-standard elbow pipe fitting, the short pipe-non-standard elbow pipe fitting is formed by connecting a short pipe and a non-standard elbow, and the short pipe-non-standard elbow pipe fitting comprises a rotary connecting rod, a clamping base, an elbow clamping block, a short pipe clamping block and an adjusting screw rod; wherein the rotary connecting rod is fixed on the compression roller type positioner, the axis of the rotary connecting rod coincides with the rotation center of the compression roller type positioner, and the clamping base is fixedly connected to the end of the rotary connecting rod and rotates around the rotation center of the compression roller type positioner along with the rotary connecting rod. The elbow clamping block is fixed on the clamping base and fixes a non-standard elbow through the U-shaped pipe clamp, the short pipe clamping block is fixed on the clamping base through the adjusting screw rod in a position-adjustable mode, and the short pipe clamping block fixes a short pipe through the U-shaped pipe clamp; when the rotary connecting rod rotates along with the compression roller type positioner, the circumferential center of an arc welding seam at the welding position of the non-standard elbow and other pipe fittings coincides with the rotary center of the compression roller type positioner. The device achieves the effects of improving the welding quality, improving the operation efficiency, reducing the use cost, and being reliable and safe.

Description

Technical Field

[0001] The invention relates to a pipe fitting processing technology, in particular to a clamping device and method for welding short pipe-non-standard elbow pipe fittings, belonging to the technical field of pipeline welding. Background Art

[0002] Pipeline structure is an indispensable part of many heavy equipment. For example, marine engines have various pipeline systems for transporting gas and liquid. Due to the needs of marine engine structure, there are many pipe fittings in these pipeline systems that are connected by straight pipes and pipe elbows. With the development of marine engine technology, straight pipe and elbow splices are often needed in pipeline systems. As the structure of marine engines becomes more and more compact, the length of the straight pipe in the splice is getting shorter and shorter, becoming a shorter short pipe 01, such as Figure 3 As shown, the elbow is often a non-standard elbow 02 with a non-90° angle, and the elbow angle varies.

[0003] See also Figure 1 , these short tubes-non-standard elbow pipe fittings need to be welded with other straight pipes 03 in the pipeline system, which brings difficulties to the clamping of the short tube-non-standard elbow pipe fittings when welding with other pipe fittings, because the length of the short tube 01 is too short, and the bending angle of the non-standard elbow 02 is not standard, so the displacement mechanism of the current welding device is difficult to clamp and rotate it, and it is difficult to complete the welding of the weld between the non-standard elbow 02 and other straight pipes 03. At present, the common practice is mainly for the operator to make a self-made tool, and use the method of bolt centering to clamp the non-standard elbow 02 to ensure that the weld of the non-standard elbow 02 always rotates around the circumference center of the straight pipe 03 during the rotation process. The disadvantage of this method is that the bolts can easily damage the surface of the non-standard elbow 02, resulting in quality risks of the product; at the same time, since the clamping point of the non-standard elbow 02 is point contact, there is a risk of falling off, which can easily affect the welding quality of the pipeline. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiency that the existing welding positioner cannot directly clamp short tube-non-standard elbow pipe fittings and realize the circular motion of the butt weld, and provide a clamping device and method for welding short tube-non-standard elbow pipe fittings, so that the center of the butt weld coincides with the rotation center of the welding positioner, so that the butt weld moves in a circular motion around the rotation center of the welding positioner, thereby cooperating with the welding equipment to complete the welding of the short tube-non-standard elbow pipe fittings, thereby achieving the effect of improving welding quality, improving work efficiency, reducing use cost and ensuring reliable and safe operation.

[0005] Based on the above purpose, the technical solution provided by the present invention is as follows:

[0006] A clamping device for welding short tube-non-standard elbow pipe fittings, connected to a roller positioner, and used in conjunction with welding equipment to achieve welding of short tube-non-standard elbow pipe fittings, wherein the short tube-non-standard elbow pipe fittings are formed by connecting a short tube with a non-standard elbow, and is characterized in that the clamping device comprises a rotating connecting rod, a clamping base, an elbow clamping block, a short tube clamping block, and an adjusting screw;

[0007] The rotating connecting rod is fixedly connected to the roller positioner and its axis coincides with the rotation center of the roller positioner. The clamping base is fixedly connected to the end of the rotating connecting rod and rotates around the rotation center of the roller positioner together with the rotating connecting rod. The elbow clamping block is fixed to the clamping base and fixes the non-standard elbow through a U-shaped pipe clamp. The short tube clamping block is fixed to the clamping base through the adjusting screw and its position can be adjusted. The short tube clamping block fixes the short tube through another U-shaped pipe clamp.

[0008] When the rotating connecting rod rotates with the roller positioner, the circumferential center of the arc weld at the welding point between the non-standard elbow and other pipe fittings coincides with the rotation center of the roller positioner.

[0009] Furthermore, the clamping base is provided with a curved groove connected to the adjusting screw for adjusting the fixed position of the short tube clamping block on the clamping base to adapt to the clamping of short tubes and non-standard elbow pipe fittings with different bending angles.

[0010] Furthermore, the bending angle of the non-standard elbow is any angle within the range of 0°-180° except 0°, 90° and 180°.

[0011] Furthermore, other pipe fittings welded to the non-standard elbow are straight pipes or curved pipes.

[0012] Another technical solution of the present invention is:

[0013] A clamping method for welding short pipes and non-standard elbow pipe fittings using the above-mentioned clamping device comprises the following specific steps:

[0014] 1) installing the rotating connecting rod on the roller positioner so that the central axis of the rotating connecting rod coincides with the rotation center of the roller positioner;

[0015] 2) The elbow clamping block is fixed to the clamping base by bolts, and the non-standard elbow of the short pipe-non-standard elbow pipe fitting is fixedly connected to the elbow clamping block by using a U-shaped pipe clamp;

[0016] 3) Fix the short tube clamping block to the clamping base through the adjusting screw, adjust the position of the adjusting screw on the clamping base to adapt to non-standard elbows with different bending angles, and then use a U-shaped pipe clamp to fix the short tube to the short tube clamping block;

[0017] 4) Rotate the roller positioner to adjust and confirm that the circumferential center of the arc weld at the welding point between the non-standard elbow and other pipe fittings coincides with the rotation center of the roller positioner;

[0018] 5) Cooperate with welding equipment to realize welding of the short pipe-non-standard elbow pipe fitting and other pipe fittings.

[0019] Compared with the current welding clamping method, the present invention achieves the following effects:

[0020] 1. Stable and reliable - the present invention clamps the short tube and non-standard elbow by means of a clamping block and a semicircular U-shaped pipe clamp, thereby realizing reliable clamping of the short tube-non-standard elbow pipe fittings, with high clamping force and stable effect, thus ensuring the completion of the welding operation of the short tube-non-standard elbow pipe fittings.

[0021] 2. Improved welding quality - the circumferential center of the weld of the short pipe-non-standard elbow fitting is precisely aligned with the rotation center of the rotating connecting rod and the rotation center of the roller positioner, thereby ensuring the stability of the weld quality.

[0022] 3. Wide range of applications - the short tube clamping block can adapt to the clamping of short tubes and non-standard elbow fittings with different bending angles by adjusting the position of the adjusting screw in the curved groove of the clamping base.

[0023] 4. Low investment cost: The clamping device of the present invention has a simple structure, is easy to manufacture, and has a low use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the present invention.

[0025] Figure 2 It is the front view of the present invention.

[0026] Figure 3 yes Figure 2 Top view of the .

[0027] In the figure, 01 is a short tube, 02 is a non-standard elbow, 03 is a straight tube, 1 is a rotating connecting rod, 2 is a clamping base, 3 is a short tube clamping block, 4 is an elbow clamping block, 5 is a U-shaped pipe clamp, and 6 is an adjusting screw. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the accompanying drawings. Any equivalent changes and modifications made based on the contents of this specification belong to the technical scope of the present invention.

[0029] The present invention is used for clamping on a roller positioner during welding of short tube-non-standard elbow pipe fittings, and cooperates with welding equipment to achieve welding of short tube-non-standard elbow pipe fittings and other pipe fittings. Figure 1 As shown, the short tube-non-standard elbow pipe fitting is formed by connecting a short tube 01 with a non-standard elbow 02. The bending angle of the non-standard elbow 02 is any angle within the range of 0°-180° except 0°, 90° and 180°. The non-standard elbow 02 needs to be butt welded with other pipe fittings. The other pipe fittings welded with the non-standard elbow 02 can be a straight pipe 03 or a bent pipe.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the clamping device for welding short pipes and non-standard elbow pipe fittings is connected to a roller positioner, and includes a rotating connecting rod 1, a clamping base 2, a short pipe clamping block 3, an elbow clamping block 4 and an adjusting screw 6.

[0031] The rotating connecting rod 1 is fixedly connected to the roller positioner and its axis coincides with the rotation center of the roller positioner.

[0032] The clamping base 2 is fixedly connected to the end of the rotating connecting rod 1 and rotates around the rotation center of the roller type positioner together with the rotating connecting rod 1; the clamping base 2 is provided with a curved groove connected to the adjusting screw 6, which is used to adjust the fixed position of the short tube clamping block 3 on the clamping base 2 to adapt to the clamping of short tubes and non-standard elbow pipe fittings with different bending angles.

[0033] The elbow clamping block 4 is fixed on the clamping base 2 and fixes the non-standard elbow 02 through the U-shaped pipe clamp 5.

[0034] The short tube clamping block 3 is fixed to the clamping base 2 through the adjusting screw 6, and the short tube clamping block 3 fixes the short tube 01 through another U-shaped tube clamp 5; the adjusting screw 6 is connected to the curved groove of the clamping base 2, and the position of the short tube clamping block 3 can be adjusted by adjusting its position in the curved groove, so as to adapt to the clamping of short tubes and non-standard elbow pipe fittings with different bending angles.

[0035] When the rotating connecting rod 1 rotates with the roller positioner, the circumferential center of the arc weld at the welding point between the non-standard elbow 02 and other pipe fittings coincides with the rotation center of the roller positioner.

[0036] The clamping method for welding short pipe-non-standard elbow pipe fittings of the present invention comprises the following specific steps:

[0037] 1) installing the rotating connecting rod 1 on the roller positioner so that the central axis of the rotating connecting rod 1 coincides with the rotation center of the roller positioner;

[0038] 2) The elbow clamping block 4 is fixed to the clamping base 2 by bolts, and the non-standard elbow 02 of the short pipe-non-standard elbow pipe fitting is fixedly connected to the elbow clamping block 4 by using a U-shaped pipe clamp 5;

[0039] 3) Fix the short tube clamping block 3 on the clamping base 2 through the adjusting screw 6, adjust the position of the adjusting screw 6 on the clamping base 2 to adapt to non-standard elbows with different bending angles, and then use another U-shaped pipe clamp 5 to fix the short tube 01 to the short tube clamping block 3;

[0040] 4) Rotate the roller positioner to adjust and confirm that the circumferential center of the arc weld at the welding point between the non-standard elbow 02 and other pipe fittings coincides with the rotation center of the roller positioner to complete the preparation work before welding;

[0041] 5) Cooperate with welding equipment to realize welding of the short pipe-non-standard elbow pipe fitting and other pipe fittings.

[0042] The protection scope claimed by the present invention is not limited to the above-mentioned embodiments, but should also include other obvious changes and alternatives to the present invention.

Claims

1. A clamping device for welding short tube-non-standard elbow pipe fittings, connected to a roller positioner, and used in conjunction with welding equipment to achieve welding of short tube-non-standard elbow pipe fittings, wherein the short tube-non-standard elbow pipe fittings are formed by connecting a short tube with a non-standard elbow, and are characterized in that: The clamping device comprises a rotating connecting rod, a clamping base, an elbow clamping block, a short tube clamping block and an adjusting screw; The rotating connecting rod is fixedly connected to the roller positioner and its axis coincides with the rotation center of the roller positioner. The clamping base is fixedly connected to the end of the rotating connecting rod and rotates around the rotation center of the roller positioner together with the rotating connecting rod. The elbow clamping block is fixed to the clamping base and fixes the non-standard elbow through a U-shaped pipe clamp. The short tube clamping block is fixed to the clamping base through the adjusting screw and its position can be adjusted. The short tube clamping block fixes the short tube through another U-shaped pipe clamp. When the rotating connecting rod rotates with the roller positioner, the circumferential center of the arc weld at the welding point between the non-standard elbow and other pipe fittings coincides with the rotation center of the roller positioner.

2. The clamping device for welding short pipes and non-standard elbow pipe fittings according to claim 1, characterized in that: The clamping base is provided with a curved groove connected to the adjusting screw, which is used to adjust the fixed position of the short tube clamping block on the clamping base to adapt to the clamping of short tubes and non-standard elbow pipe fittings with different bending angles.

3. The clamping device for welding short pipes and non-standard elbow pipe fittings according to claim 1, characterized in that: The bending angle of the non-standard elbow is any angle within the range of 0°-180° except 0°, 90° and 180°.

4. The clamping device for welding short pipes and non-standard elbow pipe fittings according to claim 1, characterized in that: Other pipe fittings welded with the non-standard elbow are straight pipes or curved pipes.

5. A clamping method for welding short pipes and non-standard elbow pipe fittings using the clamping device of claim 1, characterized in that: The clamping method comprises the following specific steps: 1) installing the rotating connecting rod on the roller positioner so that the central axis of the rotating connecting rod coincides with the rotation center of the roller positioner; 2) The elbow clamping block is fixed to the clamping base by bolts, and the non-standard elbow of the short pipe-non-standard elbow pipe fitting is fixedly connected to the elbow clamping block by using a U-shaped pipe clamp; 3) Fix the short tube clamping block to the clamping base through the adjusting screw, adjust the position of the adjusting screw on the clamping base to adapt to non-standard elbows with different bending angles, and then use a U-shaped pipe clamp to fix the short tube to the short tube clamping block; 4) Rotate the roller positioner to adjust and confirm that the circumferential center of the arc weld at the welding point between the non-standard elbow and other pipe fittings coincides with the rotation center of the roller positioner; 5) Cooperate with welding equipment to realize welding of the short pipe-non-standard elbow pipe fitting and other pipe fittings.

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