Straight seam welding device for heavy conical pipe

Abstract

The utility model discloses a straight seam welding device for a heavy conical pipe, which relates to the technical field of heavy steel pipe processing and comprises a ground rail, a welding door frame is arranged on the ground rail, a submerged arc welding gun is arranged on the welding door frame, a jig frame is arranged in the door frame, clamping arms are symmetrically arranged on two sides of the jig frame, clamping hydraulic cylinders are mounted on the clamping arms, and the clamping hydraulic cylinders are connected with the welding door frame. A supporting seat is fixedly arranged at one end of the jig frame, the jig frame is provided with a sliding rail parallel to the ground rail, a sliding seat is arranged on the sliding rail in a sliding mode, a driving mechanism enabling the sliding seat to slide along the sliding rail is arranged on the sliding seat in a matched mode, and a wedge block is arranged at the top of the sliding seat; the driving mechanism comprises a lead screw penetrating through the sliding seat, a synchronous belt is arranged at one end of the lead screw, and a driving motor is arranged on the synchronous belt; according to the utility model, the wedge block is driven by the driving motor to be inserted between the conical pipe and the jig frame, so that a welding bead is in a horizontal state, and the quality of a welding seam is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy steel pipe processing, in particular to a heavy tapered pipe straight seam welding device. Background Art

[0002] Conical tubes are also called concentric reducers. When making them, the steel plate is first cut into a fan-shaped structure. The cut steel plate is then placed in a plate rolling machine and rolled into a cylinder with a certain taper. The cylinder is then placed on a welding device for welding. After welding, the conical tube is placed on a cone rolling machine for correction to obtain the final product.

[0003] During the welding process, in order to ensure and improve the quality of the weld, it is necessary to keep the welding angle of the welding gun in the horizontal and downward welding position as much as possible, and reduce vertical welding and overhead welding. The welding parameters of the equipment need to be precisely adjusted during vertical welding and overhead welding, so the skill level of the operator is required to be higher. Compared with vertical welding or overhead welding, horizontal and downward welding is easier for operators to operate and easier to ensure the quality of the weld.

[0004] When welding straight seams of tapered pipes, since the tapered pipes have a certain taper at this time, the entire weld is not horizontal after being placed on the workbench, but sloped, and the welding angle is between flat welding and vertical welding. When welding at this angle, the molten metal in the molten pool will flow downward along the weld under the action of gravity, resulting in incomplete welding at the high position of the weld and excessive weld height at the low position. In this case, the width of the weld obtained will be inconsistent, which will affect the quality of the entire weld.

[0005] Therefore, a heavy-duty tapered pipe straight seam welding device is urgently needed to ensure that the weld of the tapered pipe is in a horizontal state during straight seam welding to ensure the quality of the weld. Utility Model Content

[0006] In response to the above technical problems, the utility model provides a heavy-duty tapered pipe straight seam welding device, which is used to solve the problem that the weld is not in a horizontal state during the straight seam welding of existing tapered pipes, resulting in the inability to ensure the quality of the weld.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A heavy-duty tapered pipe straight seam welding device comprises a ground rail, a welding gantry is provided on the ground rail, a submerged arc welding gun is provided on the welding gantry, a tire frame is provided in the welding gantry, clamping arms are symmetrically provided on both sides of the tire frame, a clamping hydraulic cylinder is installed on the clamping arms, a support seat is fixedly provided at one end of the tire frame, a slide rail is provided on the tire frame parallel to the ground rail, a slide seat is slidably provided on the slide rail, a driving mechanism is provided on the slide seat for sliding along the slide rail, and a wedge is provided on the top of the slide seat;

[0009] The driving mechanism includes a screw that passes through the slide, one end of the screw is provided with a synchronous belt, and the synchronous belt is equipped with a driving motor;

[0010] The support seat is provided with a first support opening, and the wedge block is provided with a second support opening.

[0011] Furthermore, the first supporting opening and the second supporting opening are both arc-shaped openings with a taper.

[0012] Furthermore, a height compensation mechanism is provided between the wedge block and the slide seat.

[0013] Furthermore, the height compensation mechanism includes a cylinder arranged on a slide, the output end of the cylinder is connected to the wedge block, a plurality of guide tubes are rectangularly arranged on the slide, a guide rod is arranged in the guide tube, and one end of the guide rod is connected to the wedge block.

[0014] Furthermore, a stop portion is provided at the front end of the support seat located at the first support opening.

[0015] Furthermore, an elastic clamp is provided at the output end of the clamping hydraulic cylinder.

[0016] Furthermore, a plurality of clamping arms are arranged along the length direction of the tire frame.

[0017] In summary, the beneficial technical effects of the present invention are:

[0018] (1) The first supporting opening on the supporting seat is used to support the large diameter end of the tapered tube, and the driving motor is used to drive the slide to insert the wedge block into the gap between the other end of the tapered tube and the tire frame to provide support, so that the weld on the entire tapered tube is in a horizontal state, ensuring that the submerged arc welding gun can achieve welding at a flat welding angle, thereby ensuring the quality of the weld.

[0019] (2) The first supporting opening and the second supporting opening with a taper are used to increase the contact area with the side wall of the tapered tube, thereby improving the stability of the tapered tube support.

[0020] (3) The cylinder can be used to further lift the wedge block when the wedge block support height is insufficient, thereby playing a role in height compensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 yes Figure 1 Structural diagram from another angle;

[0023] Figure 3 yes Figure 1Structural diagram from the third angle;

[0024] Figure 4 yes Figure 2 Hidden schematic diagram of the wedge;

[0025] Figure 5 This is a schematic diagram of the use of the utility model;

[0026] Figure 6 yes Figure 5 Schematic diagram from another angle.

[0027] Figure numerals: 1. Ground rail; 2. Welding gantry; 3. Submerged arc welding gun; 4. Cradle; 5. Support seat; 6. Slide rail; 7. Slide seat; 8. Wedge; 9. Lead screw; 10. Synchronous belt; 11. Drive motor; 12. First support port; 13. Second support port; 14. Guide tube; 15. Guide rod; 16. Cylinder; 17. Clamp arm; 18. Clamping hydraulic cylinder; 19. Elastic chuck; 20. Stopper; 21. Tapered tube; 22. Weld bead. DETAILED DESCRIPTION

[0028] The present invention will be described clearly and completely below with reference to the embodiments.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In the description of the embodiments, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections, connections through an intermediary medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on their specific circumstances.

[0031] See attached Figure 1-4 , shown is a heavy-duty tapered pipe straight seam welding device, comprising a ground rail 1, a welding gantry 2 provided on the ground rail 1, a submerged arc welding gun 3 slidably provided on the welding gantry 2, and the submerged arc welding gun 3 is controlled by the ground rail 1 and the welding gantry 2 to achieve forward, backward, left, right, up and down movement during welding;

[0032] The tire frame 4 is fixedly provided in the welding gantry 2, and a plurality of clamping arms 17 are symmetrically arranged on both sides of the tire frame 4, and a clamping hydraulic cylinder 18 is installed on each clamping arm 17, and the output end of the clamping hydraulic cylinder 18 is bolted to an elastic collet 19, wherein the elastic collet 19 is made of rubber. The elastic collet 19 can not only reduce the rigidity between the output end of the clamping hydraulic cylinder 18 and the tapered tube 21, but also avoid the clamping damage of the tapered tube 21 by the clamping hydraulic cylinder 18. A support seat 5 is fixedly provided at one end of the tire frame 4, and a first support opening 12 is opened on the support seat 5. At the same time, a stop portion 20 is provided at the front end of the support seat 5 at the first support opening 12. When welding, the end of the large diameter of the tapered tube 21 is placed in the first support opening 12, and the end of the tapered tube 21 is abutted against the stop portion 20. The stop portion 20 limits the tapered tube 21 when clamping and fixing it, and prevents the tapered tube 21 from sliding forward when clamping;

[0033] At the same time, the tire frame 4 is located on both sides of the support seat 5 and is provided with slide rails 6 parallel to the length direction of the tire frame 4. A slide seat 7 is slidably provided on the slide rail 6. A threaded hole is opened at the center of the slide seat 7. A screw 9 is passed through the screw hole. One end of the screw 9 is rotatably connected to the support seat 5, and the other end is connected to the tire frame 4 through a rotating seat. At the same time, a step pulley is provided at the end of the screw 9 away from the support seat 5. A synchronous belt 10 is provided on the step pulley. A driving motor 11 is provided at the other end of the synchronous belt 10. At the same time, a wedge 8 is provided on the slide seat 7. The wedge 8 is provided with a second support opening 13 along the length direction of the slide rail 6, wherein the first support opening 12 and the second support opening 13 are both connected to the cone The arc-shaped openings of the tapered tube 21 have the same taper. When in use, the end of the tapered tube 21 with a large diameter is placed in the first support opening 12. At this time, in order to keep the weld bead 22 in a horizontal state, a gap of a certain width is generated between the end of the tapered tube 21 with a small diameter and the tire frame 4. At this time, the slide 7 and the wedge 8 are inserted into this gap by the driving motor 11 using the screw 9. The wedge 8 supports the end of the tapered tube 21 with a small diameter, so that the weld bead 22 remains horizontal. Therefore, the wedge 8 can be inserted into gaps of different widths to support tapered tubes 21 of different diameters, thereby ensuring that the submerged arc welding gun 3 can weld at a flat and downward welding angle, further ensuring the quality of the weld.

[0034] At the same time, a height compensation mechanism is provided between the slide 7 and the wedge 8. When the insertion height of the wedge 8 cannot meet the gap width between the minor diameter end of the tapered tube 21 and the tire frame 4, the height of the wedge 8 can be further lifted by the height compensation mechanism. The specific height compensation mechanism includes a cylinder 16 provided on the slide 7, the output end of the cylinder 16 is connected to the bottom of the wedge 8, and a guide tube 14 is provided at each of the four corners of the slide 7. A guide rod 15 is provided in the guide tube 14. When the cylinder 16 lifts the wedge 8 upward, the cooperation between the guide tube 14 and the guide rod 15 improves the stability of the wedge 8.

[0035] When welding, see the attached Figure 5-6 First, the tapered tube 21 is hoisted onto the tire frame 4 through the lifting device, and the large diameter end of the tapered tube 21 is placed in the first support opening 12, and the end is abutted against the stopper 20. At the same time, it is necessary to ensure that the weld bead 22 is located at the top position of the tapered tube 21 and the weld bead 22 is in a horizontal state. Then, the slide 7 and the wedge block 8 are driven by the driving motor 11 to insert into the gap between the small diameter end of the tapered tube 21 and the tire frame 4, so that the wedge block 8 can lift the small diameter end of the tapered tube 21 through the second support opening 13. Then, the clamping hydraulic cylinders 18 on both sides of the tapered tube 21 use the elastic chuck 19 to clamp the left and right sides of the tapered tube 21, so that it can achieve the purpose of seaming the weld bead 22 and prevent displacement during welding. Then, the submerged arc welding gun 3 is moved to the top of the weld bead 22 through the welding gantry 2 for welding.

[0036] The above description is only a preferred specific embodiment of the present invention and does not limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heavy-duty tapered pipe straight seam welding device, comprising a ground rail (1), a welding gantry (2) provided on the ground rail (1), a submerged arc welding gun (3) provided on the welding gantry (2), a tire frame (4) provided inside the welding gantry (2), clamping arms (17) symmetrically provided on both sides of the tire frame (4), a clamping hydraulic cylinder (18) installed on the clamping arms (17), characterized in that: A support seat (5) is fixedly provided at one end of the tire frame (4), and a slide rail (6) is provided on the tire frame (4) parallel to the ground rail (1). A slide seat (7) is provided on the slide rail (6) for sliding. The slide seat (7) is provided with a driving mechanism for sliding along the slide rail (6), and a wedge block (8) is provided on the top of the slide seat (7); The driving mechanism comprises a screw (9) passing through the slide (7), one end of the screw (9) is provided with a synchronous belt (10), and the synchronous belt (10) is equipped with a driving motor (11); The support seat (5) is provided with a first support opening (12), and the wedge block (8) is provided with a second support opening (13).

2. A heavy-duty tapered pipe straight seam welding device according to claim 1, characterized in that: The first supporting opening (12) and the second supporting opening (13) are both arc-shaped openings with a taper.

3. The heavy-duty tapered pipe straight seam welding device according to claim 1, characterized in that: A height compensation mechanism is also provided between the wedge block (8) and the slide seat (7).

4. A heavy-duty tapered pipe straight seam welding device according to claim 3, characterized in that: The height compensation mechanism comprises a cylinder (16) arranged on a slide (7), the output end of the cylinder (16) is connected to a wedge (8), a plurality of guide tubes (14) are arranged in a rectangular shape on the slide (7), a guide rod (15) is arranged in the guide tube (14), and one end of the guide rod (15) is connected to the wedge (8).

5. The heavy-duty tapered pipe straight seam welding device according to claim 1, characterized in that: The support seat (5) is provided with a stopper (20) at the front end of the first support opening (12).

6. The heavy-duty tapered pipe straight seam welding device according to claim 1, characterized in that: An elastic clamp (19) is provided at the output end of the clamping hydraulic cylinder (18).

7. The heavy-duty tapered pipe straight seam welding device according to claim 1, characterized in that: A plurality of clamping arms (17) are arranged along the length direction of the tire frame (4).

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