Auxiliary support for girth welding of pressure steel pipe

Abstract

The utility model discloses an auxiliary support for girth welding of a pressure steel pipe, which relates to the technical field of pressure steel pipe processing and comprises a support, filler strips distributed at equal intervals are fixedly connected to the bottom of the support, and guide rails distributed symmetrically are fixedly connected to the tops of the filler strips. Symmetrically-distributed guide rods are fixedly connected to the two sides of the top of the support, heating structures are mounted on the inner sides of the two guide rods, each heating structure comprises a mounting block located on the inner side of the corresponding guide rod, and two symmetrically-distributed heating plates are rotationally connected to the interior of each mounting block; the heating plates are hinged end to end to form an arc-shaped structure with the adjustable curvature, and the arc-shaped structure is located on the outer side of the pressure steel pipe. According to the auxiliary support for girth welding of the pressure steel pipes, through the heating plate with the adjustable radian, automatic adaptation can be conducted according to the pressure steel pipes of different sizes, a heating area is more uniform, the welding stress is effectively reduced, the temperature gradient is reduced, the stability of a welding joint is improved, and cracking is prevented.

Description

Technical Field

[0001] This utility model relates to the field of pressure steel pipe processing technology, specifically an auxiliary support for circumferential welding of pressure steel pipes. Background Technology

[0002] Pressure steel pipes are pipelines used to transport high-pressure fluids and are widely used in water conservancy, power, petroleum, chemical and other fields. Pressure steel pipes need to be welded during the processing and auxiliary heating is applied to the weld joints.

[0003] To achieve the above functions, a prior art Chinese patent (publication number: CN222037285U) discloses a heating device for welded circumferential seams of pressure steel pipes, which consists of a support mechanism, an arc-shaped bracket, and heating elements installed on the arc-shaped bracket. The support mechanism consists of a circular tube supporting two sets of supports. Each set of supports includes an I-beam, electric push rods, diagonal braces, pads, vertical plates, and horizontal plates. The I-beam is welded and fixed to the circular tube axially perpendicularly. Two electric push rods are arranged in parallel, and a pad of the same length as the vertical plate is welded between the front walls of the two electric push rods. The two ends of the pad surface are respectively supported and fixed to the circular tube by welding diagonal braces. The arc-shaped bracket has an arc-shaped surface matching the diameter of the pressure steel pipe. The back of the arc-shaped bracket is welded and fixed to the right-angle groove formed by the horizontal and vertical plates. Heating elements are installed on the inner side of the arc-shaped bracket. The structure has high stability and safety, safer electricity use, high heating efficiency, significant energy saving effect, improved welding efficiency, and greatly reduced labor intensity.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist in their operation: the weld seam needs to be heated during the welding process of pressure steel pipes. In this process, the pressure steel pipes need to be installed inside the auxiliary support for heating. The weld seam is generally heated by a heating plate with an arc structure. However, pressure steel pipes have different sizes, and the curvature of the existing arc heating plate is not easy to adjust. Utility Model Content

[0005] The purpose of this utility model is to provide an auxiliary support for circumferential welding of pressure steel pipes, so as to solve the problem that in the above-mentioned background technology, the weld seam is generally heated by a heating plate with an arc structure. However, pressure steel pipes have different sizes, and the curvature of the existing arc heating plate is not easy to adjust.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary support for circumferential welding of pressure steel pipes, comprising a support, wherein the bottom of the support is fixedly connected with equidistantly distributed pads, and the top of the pads is fixedly connected with symmetrically distributed guide rails;

[0007] The top two sides of the bracket are fixedly connected with symmetrically distributed guide rods, and heating structures are installed on the inner sides of the two guide rods. The heating structure includes a mounting block located inside the guide rod, and two symmetrically distributed heating plates are rotatably connected inside the mounting block. The heating plates are hinged at the ends to form an arc-shaped structure with adjustable curvature, and the arc-shaped structure is located outside the pressure steel pipe.

[0008] The top of the guide rail is equipped with a support structure to support the pressure steel pipe.

[0009] Preferably, an adjusting block is slidably connected to the outside of the guide rod, and two connecting rods are rotatably connected to the side of the adjusting block away from the guide rod. The end of the connecting rod away from the adjusting block is rotatably connected to the mounting block, and the two connecting rods maintain a parallel motion state.

[0010] Preferably, the heating plate is fixedly connected to symmetrically distributed mounting seats on the side away from the pressure steel pipe, and the pneumatic rod located inside the mounting block is fixed inside it.

[0011] Preferably, the adjusting block has a threaded hole in the middle, and a lead screw is threadedly connected inside the adjusting block, with both ends of the lead screw rotatably connected to the top of the bracket.

[0012] Preferably, the top of the adjusting block is fixedly connected to two symmetrically distributed studs, and a clamping plate is slidably connected between the two studs. Nuts are threadedly connected to the outside of the studs, and when the nuts are tightened, they press against the top of the clamping plate.

[0013] Preferably, a pull rope is clamped between the bottom of the clamping plate and the top of the adjusting block, and a pull ring is installed at the end of the pull rope away from the adjusting block, and the pull ring is fixedly connected to the middle of the outer side of the mounting block.

[0014] Preferably, the support structure includes a motion seat mounted on the top of the guide rail, with support wheels rotatably connected to the four corners of the top of the motion seat, and pulleys rotatably connected to the four corners of the bottom of the motion seat, with the pulleys forming a rolling engagement with the guide rail.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This auxiliary support for circumferential welding of pressure steel pipes can automatically adapt to different sizes of pressure steel pipes through an adjustable heating plate, making the heating area more uniform, effectively reducing welding stress, lowering the temperature gradient, improving the stability of the welded joint, and preventing cracking.

[0017] The support wheels allow the pressure steel pipe to rotate, and the pulleys enable the support structure to move horizontally on the guide rail, facilitating the adjustment of the welding position. This allows the steel pipe to be easily transported and processed after welding, improving work efficiency and safety. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the support structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the guide rail structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the motion seat structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the heating plate structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the mounting block of this utility model.

[0024] In the diagram: 1. Bracket; 2. Pad strip; 3. Guide rail; 4. Guide rod; 5. Adjusting block; 6. Connecting rod; 7. Mounting block; 8. Heating plate; 9. Mounting seat; 10. Pneumatic rod; 11. Lead screw; 12. Stud; 13. Clamping plate; 14. Nut; 15. Pull rope; 16. Pull ring; 17. Motion seat; 18. Support wheel; 19. Pulley. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: Please refer to Figure 1 - Figure 6This utility model provides the following technical solution: an auxiliary support for circumferential welding of pressure steel pipes, comprising a support 1, with equidistantly distributed pads 2 fixedly connected to the bottom of the support 1, and symmetrically distributed guide rails 3 fixedly connected to the top of the pads 2; symmetrically distributed guide rods 4 fixedly connected to both sides of the top of the support 1, and a heating structure installed on the inner side of each guide rod 4, the heating structure including a mounting block 7 located inside the guide rod 4, and two symmetrically distributed heating plates 8 rotatably connected inside the mounting block 7, the heating plates 8 forming an adjustable curvature arc structure by hinges at both ends, and the arc structure located outside the pressure steel pipe; a support structure for supporting the pressure steel pipe is installed on the top of the guide rails 3; an adjusting block 5 is slidably connected to the outer side of the guide rod 4, and two connecting rods 6 are rotatably connected to the side of the adjusting block 5 away from the guide rod 4, the connecting rods 6 being away from the adjusting block 5... One end is rotatably connected to the mounting block 7, and the two connecting rods 6 maintain parallel movement; the side of the heating plate 8 away from the pressure steel pipe is fixedly connected to symmetrically distributed mounting seats 9, and the pneumatic rod 10 located inside the mounting block 7 is fixed inside it; the center of the adjusting block 5 is provided with a threaded hole, and the adjusting block 5 is threadedly connected to a lead screw 11, and the two ends of the lead screw 11 are rotatably connected to the top ends of the bracket 1; the top of the adjusting block 5 is fixedly connected to two symmetrically distributed studs 12, and a clamping plate 13 is slidably connected between the two studs 12, and a nut 14 is threadedly connected to the outside of the studs 12, and when the nut 14 is tightened, it presses the top of the clamping plate 13; a pull rope 15 is clamped between the bottom of the clamping plate 13 and the top of the adjusting block 5, and a pull ring 16 is installed at the end of the pull rope 15 away from the adjusting block 5, and the pull ring 16 is fixedly connected to the middle of the outside of the mounting block 7.

[0027] When welding pressure steel pipes, the pressure steel pipes are first fixedly installed inside the support 1 by the support structure to make them stable. At this time, the pressure steel pipes are placed between the arc-shaped structures formed by the heating plates 8 so as to accurately heat the welding parts of the pressure steel pipes, thereby reducing welding stress, alleviating temperature gradient changes in the welding area, effectively reducing thermal stress, and preventing cracks from appearing in the weld joint.

[0028] For pressure steel pipes of different sizes, the curvature of the arc structure can be adjusted by controlling the deformation of the heating plate 8, so that it can better fit the outer surface of the pressure steel pipe. Since the heating plates 8 are connected end to end to form a whole, the angle change between them is controlled by the pneumatic rod 10. When the pneumatic rod 10 extends or retracts, it will drive the fixedly connected mounting base 9 to move away from or towards each other, so that the two adjacent heating plates 8 rotate around their hinge point, thereby adjusting the curvature of the arc structure. All pneumatic rods 10 are uniformly controlled by the same pneumatic control module to ensure that the movement length of each pneumatic rod 10 is consistent, so as to achieve precise adjustment of the overall curvature of the arc structure and improve the uniformity and efficiency of welding heating.

[0029] In order to ensure that the welding position of the pressure steel pipe inside the bracket 1 is accurately aligned with the heating plate 8, the adjusting block 5 can be driven to slide along the outside of the guide rod 4 by rotating the lead screw 11. The movement of the adjusting block 5 will drive the connecting rod 6, the mounting block 7 and the heating plate 8 inside the mounting block 7 to move along the outer surface of the pressure steel pipe, thereby ensuring that the heating plate 8 is accurately aligned with the welding position and improving the welding quality.

[0030] Since the adjusting block 5 and the mounting block 7 are connected by parallel connecting rods 6, the adjusting block 5, connecting rods 6 and mounting block 7 together form a parallelogram structure. When the mounting block 7 moves up and down, it always remains parallel to the adjusting block 5, thereby ensuring that the movement trajectory of the heating plate 8 is stable and does not tilt or deviate.

[0031] In addition, the position of the mounting block 7 can be further adjusted by adjusting the length of the pull rope 15 between the adjusting block 5 and the mounting block 7, thereby precisely adjusting the specific position of the heating plate 8 on the outside of the pressure steel pipe. One end of the pull rope 15 is connected to the mounting block 7 through the pull ring 16, while the other end passes through the adjusting block 5 and is fixed by the clamping plate 13. When it is necessary to adjust the height of the mounting block 7, the pull rope 15 can be pulled, and then the clamping plate 13 can be tightened with the nut 14 to ensure the fixed state of the pull rope 15 and prevent the mounting block 7 from moving accidentally, thus achieving precise fixation of the position of the heating plate 8.

[0032] Example 2: Based on Example 1, a support structure is also disclosed, the specific structure of which is as follows: The support structure includes a motion seat 17 installed on the top of the guide rail 3, and a support wheel 18 is rotatably connected to the four corners of the top of the motion seat 17, and a pulley 19 is rotatably connected to the four corners of the bottom of the motion seat 17, and the pulley 19 forms a rolling engagement with the guide rail 3.

[0033] After the pressure steel pipe is installed inside the bracket 1, it will be located at the top of the support structure and supported at the bottom by the support wheel 18. Since the support wheel 18 can rotate freely, the pressure steel pipe can rotate on the support wheel 18 during the welding or adjustment process, so that different welding areas can smoothly enter the working range of the heating plate 8, improving the convenience and uniformity of welding. At the same time, the pulley 19 at the bottom of the motion seat 17 can roll along the guide rail 3, so that the entire support structure can move in the horizontal direction, thereby adjusting the support position of the pressure steel pipe as needed.

[0034] The support structure not only facilitates the rotation and adjustment of the pressure steel pipe inside the bracket 1, but also allows the pressure steel pipe to move horizontally along the bracket 1. After the welding operation is completed, it can be more convenient to carry out subsequent handling or other process treatments, which greatly improves the efficiency and safety of operation.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it 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 based on the specific circumstances.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An auxiliary support for circumferential welding of pressure steel pipe, comprising a support (1), wherein the bottom of the support (1) is fixedly connected with equidistantly distributed pads (2), and the top of the pads (2) is fixedly connected with symmetrically distributed guide rails (3). Its features are: The bracket (1) has symmetrically distributed guide rods (4) fixedly connected to the top two sides, and heating structures are installed on the inner sides of the two guide rods (4). The heating structure includes a mounting block (7) located inside the guide rod (4), and two symmetrically distributed heating plates (8) are rotatably connected inside the mounting block (7). The heating plates (8) form an arc structure with adjustable curvature by hinged ends, and the arc structure is located outside the pressure steel pipe. The top of the guide rail (3) is equipped with a support structure to support the pressure steel pipe.

2. The auxiliary support for circumferential welding of pressure steel pipes according to claim 1, characterized in that: An adjusting block (5) is slidably connected to the outside of the guide rod (4), and two connecting rods (6) are rotatably connected to the side of the adjusting block (5) away from the guide rod (4). The end of the connecting rod (6) away from the adjusting block (5) is rotatably connected to the mounting block (7), and the two connecting rods (6) maintain a parallel motion state.

3. The auxiliary support for circumferential welding of pressure steel pipes according to claim 1, characterized in that: The heating plate (8) is fixedly connected to symmetrically distributed mounting seats (9) on the side away from the pressure steel pipe, and the pneumatic rod (10) located inside the mounting block (7) is fixed inside it.

4. The auxiliary support for circumferential welding of pressure steel pipes according to claim 2, characterized in that: The adjusting block (5) has a threaded hole in the middle, and a screw (11) is threaded inside the adjusting block (5), and the two ends of the screw (11) are rotatably connected to the top two ends of the bracket (1).

5. The auxiliary support for circumferential welding of pressure steel pipes according to claim 4, characterized in that: The top of the adjusting block (5) is fixedly connected to two symmetrically distributed studs (12), and a clamping plate (13) is slidably connected between the two studs (12). A nut (14) is threadedly connected to the outside of the studs (12), and when the nut (14) is tightened, it presses against the top of the clamping plate (13).

6. The auxiliary support for circumferential welding of pressure steel pipes according to claim 5, characterized in that: A pull rope (15) is clamped between the bottom of the clamping plate (13) and the top of the adjusting block (5), and a pull ring (16) is installed at the end of the pull rope (15) away from the adjusting block (5), and the pull ring (16) is fixedly connected to the middle of the outer side of the mounting block (7).

7. The auxiliary support for circumferential welding of pressure steel pipes according to claim 1, characterized in that: The support structure includes a motion seat (17) installed on the top of the guide rail (3), and a support wheel (18) is rotatably connected to each of the four corners of the top of the motion seat (17). A pulley (19) is rotatably connected to each of the four corners of the bottom of the motion seat (17), and the pulley (19) forms a rolling fit with the guide rail (3).

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