Steel pipe installing and welding device and installing and welding method

Abstract

The invention relates to the technical field of steel pipe welding, in particular to a steel pipe assembling and welding device and method, comprising supports, connecting handles hinged to one ends of the supports, clamping blocks arranged at one ends, away from the supports, of the connecting handles, a plurality of clamping grooves matched with the clamping blocks are formed in the other ends of the supports at intervals, and the supports can be connected through the clamping blocks and the clamping grooves; the slideway is arranged along the length direction of the support; the lower ends of the jacks are slidably connected to the slide way, one jack is arranged on the outer side of the other jack; the two clamping tables are arranged at the upper end of one group of jacks; the two rotating seats are arranged at the upper ends of the other group of jacks; when the rotating seats are higher than the clamping table, the steel pipe is lifted by the two rotating seats and can rotate; by means of the method, the quality problems of welding misalignment, undercut and the like caused by different pipeline wall thicknesses can be reduced, meanwhile, the pipeline opening aligning time before welding is shortened, and therefore the construction period is shortened, and the welding quality is improved; meanwhile, through cooperative operation of the clamping table and the rotating base, different positions of the annular welded junction can be welded conveniently, adverse positions such as overhead welding are avoided, and the welding quality and the welding speed are improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe welding, in particular to a steel pipe assembly welding device and an assembly welding method. Background Art

[0002] Group welding refers to a method of aligning the end faces of two weldments and heating them at the contact point for welding. Group welding requires that the cross-sectional size and shape of the weldments at the contact point are the same or similar to ensure uniform heating of the weldment contact surface; pipe-to-pipe welding is to align the ends of two seamless steel pipes and then weld them, including manual arc welding, gas shielded welding and submerged arc welding. During the welding process, since the two steel pipes are fixed, it is necessary to manually rotate the steel pipes for welding, which is time-consuming and labor-intensive. Therefore, how to quickly and accurately align the end faces of the two steel pipes so that the welders can rotate and weld the steel pipes without moving their positions is an urgent problem that technical personnel in this field need to solve.

[0003] The existing application number CN202311476556.3 is a large-scale steel pipe butt circumferential seam welding equipment, or the application number CN202410804662.8 is a different diameter steel pipe butt seam welding device, both of which use a multi-claw chuck on a machine tool to achieve steel pipe fixation and rotation welding. However, in actual construction, many steel pipes must be transported to the site for assembly and welding. Due to the relatively harsh on-site environment of the construction site, more sophisticated machining equipment cannot be used on the construction site, and there is no machine tool that can achieve assembly and welding of two sections of steel pipes. Workers can only be relied on for assembly and welding, which requires at least two construction workers to fix the two steel pipes respectively, and one welder to weld and fix the two steel pipes around the weld seam, which is time-consuming and labor-intensive, and the bottom of the butt joint of the two steel pipes is not easy to weld; therefore, it is very important to design a steel pipe assembly and welding device that is suitable for the construction site, has low manufacturing cost, and is easy to use. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a steel pipe assembly welding device and an assembly welding method which are suitable for construction sites, have low manufacturing costs, and are easy to use.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A steel pipe assembly welding device comprises a support, one end of the support is hinged with a connecting handle, a clamping block is arranged at the end of the connecting handle away from the support, and the other end of the support is provided with a plurality of clamping grooves adapted to the clamping block at intervals, and a plurality of supports can be connected through the clamping blocks and the clamping grooves; a slideway is arranged along the length of the support; a jack, the lower end of the jack is slidably connected to the slideway, and the jack is arranged in two groups, one group is outside the other group; two clamping tables are arranged at the upper end of one group of jacks; two rotating seats are arranged at the upper end of the other group of jacks; when the rotating seat is not higher than the clamping table, the two ends of the steel pipe are clamped by the two clamping tables, and when the rotating seat is higher than the clamping table, the steel pipe is lifted by the two rotating seats and can rotate.

[0006] Preferably, a further technical solution of the present invention is: Preferably, a V-shaped card groove is provided on the card platform.

[0007] Preferably, the rotating seat adopts a half-moon bearing adapted to the diameter of the steel pipe.

[0008] Preferably, a slide groove adapted to the slide is provided at the lower end of the jack, and the jack is slidably connected to the slide through the slide groove; a threaded hole connected to the slide groove is provided on the lower side of the jack, and a locking bolt passes through the threaded hole. When the end of the locking bolt abuts against the slide, the position of the jack and the slide is relatively fixed.

[0009] Preferably, a slide groove is provided on the slide, and a slider is correspondingly provided at the lower end of the jack, and the jack is slidably connected in the slide groove of the slide through the slider; corresponding to a group of jacks located on the outside, electric push rods are provided at both ends of the support, and the output ends of the electric push rods are arranged facing each other and connected to the corresponding jacks.

[0010] Preferably, a brake wheel is provided on the lower side of the support.

[0011] Preferably, a threaded rod is provided on the lower side of the support, a threaded sleeve is provided on the brake wheel, and the brake wheel is connected to the threaded rod through the threaded sleeve.

[0012] The present invention also discloses a steel pipe assembly welding method, which is performed by using a steel pipe assembly welding device, and the specific steps are as follows: S1: According to the number or length of steel pipes that need to be welded and fixed, several supports are connected through blocks and slots; S2: Place the steel pipe on the clamping table and the rotating seat, and the clamping table limits the position of the steel pipe; S3: Slide the jack and adjust the height of the jack output end. Measure with a level ruler to make sure that both steel pipes are in a horizontal state and the inner diameters of the two steel pipes are on the same horizontal line to ensure that the weld misalignment meets the requirements. S4: Weld the top and front and rear sides of the annular weld between the steel pipes firmly; S5: Raise the jack on the lower side of the rotating seat synchronously, so that the rotating seat can lift the steel pipe, support the steel pipe and rotate it, so that the bottom of the annular weld can be rotated upward to a height that is convenient for welding, and then weld the remaining unwelded positions to fix them.

[0013] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: The present invention provides a steel pipe assembly welding device and an assembly welding method which can improve the butt welding rate of large-diameter pipes and ensure the accuracy of pipe butt welding, can reduce quality problems such as welding misalignment and undercut caused by different pipe wall thicknesses, and at the same time reduce the time for pipe butt welding before welding, thereby reducing the construction period and enhancing the welding quality; at the same time, through the coordinated operation of the clamping table and the rotating seat, it is convenient to weld different positions of the annular weld, avoid unfavorable positions such as overhead welding, and improve the welding quality and welding rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 2 is a schematic structural diagram of a steel pipe welding device according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a card station in an embodiment of the present invention; Figure 3 is a schematic structural diagram of a rotating seat in an embodiment of the present invention; Figure 4 2 is a schematic diagram of a top view of a steel pipe welding device according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the top view of another steel pipe welding device in an embodiment of the present invention.

[0015] Explanation of the reference numerals in the accompanying drawings: 1. support; 2. connecting handle; 3. slot; 4. slide; 5. jack; 501. slide; 6. clamping table; 601. V-shaped slot; 7. rotating seat; 8. brake wheel; 9. locking bolt; 10. electric push rod. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with specific embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0017] like Figures 1 to 4As shown, this embodiment provides a steel pipe assembly welding device, including a support 1, a connecting handle 2 is hinged at one end of the support 1, a clamping block is arranged on the lower side of one end of the connecting handle 2 away from the support 1, and a plurality of clamping grooves 3 adapted to the clamping block are arranged at intervals at the other end of the support 1. In this embodiment, two connecting handles 2 are arranged, and a connecting seat is provided on the support 1 corresponding to the connecting handle 2. One end of the connecting handle 2 is inserted into the connecting seat and penetrated by a rotating shaft, and the connecting handle 2 is hingedly connected to the connecting seat through the rotating shaft; when in use, different numbers of supports 1 can be selected for connection according to the lengths of the two sections of steel pipes to be welded, and two adapted bases are formed corresponding to the two sections of steel pipes to be welded. After the steel pipes are installed on the corresponding bases, the two bases are connected; wherein, when the support 1 is connected to the support 1 and the bases are connected to the bases, the connecting handle 2 is rotated to make the clamping block stuck in the clamping groove 3 at the appropriate position. A slideway 4 is arranged on the support 1 along the length direction of the support 1, and a jack 5 is slidably connected to the slideway 4. The slideway 4 is a double slideway 4, and the sliding connection of the jack 5 is more stable; two groups of jacks 5 are arranged, one group is outside and the other group is inside, and each group has two; Figure 1 , Figure 4 A clamping table 6 is connected to the output end of the outer group of jacks 5, and a V-shaped clamping groove 601 is arranged on the clamping table 6; a rotating seat 7 is installed on the output end of the inner group of jacks 5, and the rotating seat 7 adopts a half-moon bearing adapted to the diameter of the steel pipe to be welded; when the rotating seat 7 is not higher than the clamping table 6, the two ends of the steel pipe are clamped and limited by the two clamping tables 6, and when the height of the rotating seat 7 is higher than the clamping table 6, the steel pipe is lifted by the two rotating seats 7 and can rotate.

[0018] The structure in which the jack 5 is slidably connected to the slideway 4 is specifically as follows: Figure 2 , Figure 3 The lower end of the jack 5 is provided with a slide groove 501 adapted to the slideway 4, and the jack 5 is slidably connected to the slideway 4 through the slide groove 501; a threaded hole connected to the slide groove 501 is provided on the lower side of the jack 5, and a locking bolt 9 passes through the threaded hole. When the end of the locking bolt 9 abuts against the slideway 4, the position of the jack 5 and the slideway 4 is relatively fixed; during operation, loosen the locking bolt 9, manually move the jack 5, and after moving to the specified position, tighten the locking bolt 9 to fix the position of the jack 5.

[0019] Another structure in which the jack 5 is slidably connected to the slideway 4 is as follows: Figure 5 A slide groove 501 is provided on the slideway 4, and a slider is correspondingly provided at the lower end of the jack 5, and the jack 5 is slidably connected in the slide groove 501 of the slideway 4 through the slider; corresponding to a group of jacks 5 located on the outside, electric push rods 10 are provided at both ends of the support 1, and the output ends of the electric push rods 10 are arranged opposite to each other and connected to the corresponding jacks 5; although the equipment manufacturing cost is increased, no labor is required and the device is more automated.

[0020] In order to facilitate the construction workers to move the device in the factory, a brake wheel 8 is provided on the lower side of the support 1; the specific connection structure between the brake wheel 8 and the support 1 is as follows: Figure 1 As shown, a threaded rod is provided on the lower side of the support 1, a threaded sleeve is provided on the brake wheel 8, and the brake wheel 8 is connected to the threaded rod through the threaded sleeve; it is convenient to adjust the production height.

[0021] The present invention also discloses a steel pipe assembly welding method, which is performed by using a steel pipe assembly welding device, and the specific steps are as follows: S1: According to the lengths of the two sections of steel pipes to be welded, different numbers of supports 1 are selected for connection, so as to form two matching bases corresponding to the two sections of steel pipes to be welded.

[0022] S2: Place the steel pipe on the base, and support and limit the steel pipe through the clamping table 6 and the rotating seat 7 on the base; then connect the two bases.

[0023] S3: Slide the position of jack 5 and adjust the height of the output end of jack 5. After measuring with a level ruler, make sure that both steel pipes are in a horizontal state and the inner diameters of the two steel pipes are on the same horizontal line to ensure that the weld misalignment meets the requirements. By fine-tuning the jack 5 on the device, the misalignment of the pipes during docking is greatly reduced, the docking rate is accelerated, the quality of pipe welding and installation is guaranteed, the one-time pass rate of non-destructive testing is increased, and the occurrence of rework is reduced.

[0024] S4: Weld the top and front and rear sides of the annular weld between the steel pipes firmly.

[0025] S5: The jack 5 on the lower side of the rotating seat 7 is synchronously raised, so that the rotating seat 7 holds up the steel pipe, supports the steel pipe to rotate, and rotates the bottom of the annular weld (the position not welded and fixed) upward to a height convenient for welding, and then welds and fixes the remaining unwelded position; the pipeline is initially fixed by the rotating seat 7 and then rotated to avoid unfavorable positions such as overhead welding, thereby improving welding quality and welding speed.

[0026] The device and method are used to weld large-diameter pipes. After the large-diameter pipes are placed on the device, there is no need to use lifting tools such as truck cranes to move the pipes multiple times during alignment, which reduces the machine usage time and the risk of lifting operations.

[0027] The above description is only the preferred embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made by using the contents of the present invention specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A steel pipe welding device, characterized in that: The support comprises a support (1), one end of the support (1) is hingedly connected to a connecting handle (2), a clamping block is arranged at one end of the connecting handle (2) away from the support (1), and a plurality of clamping slots (3) adapted to the clamping block are arranged at intervals at the other end of the support (1), and a plurality of supports (1) can be connected via the clamping blocks and the clamping slots (3); A slideway (4) is arranged along the length of the support (1); A jack (5), the lower end of which is slidably connected to the slideway (4), and the jack (5) is provided with two groups, one group being outside the other group; Two clamping platforms (6) are arranged on the upper end of one set of jacks (5); Two rotating seats (7) are arranged on the upper end of another set of jacks (5); When the height of the rotating seat (7) is lower than the height of the clamping table (6) or is equal to the height of the clamping table (6), the two ends of the steel pipe are clamped by the two clamping tables (6); when the height of the rotating seat (7) is higher than the clamping table (6), the steel pipe is lifted by the two rotating seats (7) and can rotate.

2. The steel pipe welding device according to claim 1, characterized in that: A V-shaped card slot (601) is provided on the card platform (6).

3. The steel pipe welding device according to claim 1, characterized in that: The rotating seat (7) adopts a half-moon bearing adapted to the diameter of the steel pipe.

4. The steel pipe welding device according to claim 1, characterized in that: A slide groove (501) adapted to the slideway (4) is provided at the lower end of the jack (5), and the jack (5) is slidably connected to the slideway (4) via the slide groove (501); A threaded hole communicating with the slideway (501) is provided on the lower side of the jack (5), and a locking bolt (9) passes through the threaded hole. When the end of the locking bolt (9) abuts against the slideway (4), the position of the jack (5) and the slideway (4) are relatively fixed.

5. The steel pipe welding device according to claim 1, characterized in that: A slide groove (501) is provided on the slideway (4), and a sliding block is correspondingly provided at the lower end of the jack (5), and the jack (5) is slidably connected in the slide groove (501) of the slideway (4) via the sliding block; Corresponding to a group of jacks (5) located on the outside, electric push rods (10) are provided at both ends of the support (1), and output ends of the electric push rods (10) are arranged facing each other and connected to the corresponding jacks (5).

6. The steel pipe welding device according to claim 1, characterized in that: A brake wheel (8) is provided on the lower side of the support (1).

7. The steel pipe welding device according to claim 6, characterized in that: A threaded rod is arranged on the lower side of the support (1), a threaded sleeve is arranged on the brake wheel (8), and the brake wheel (8) is connected to the threaded rod via the threaded sleeve.

8. A steel pipe assembly welding method, characterized in that: The steel pipe welding device according to any one of claims 1 to 7 is used, and the specific steps are as follows: S1: corresponding to the number or length of steel pipes to be welded and fixed, a plurality of supports (1) are connected via clamping blocks and clamping grooves (3); S2: placing the steel pipe on the clamping table (6) and the rotating seat (7), and the clamping table (6) limits the position of the steel pipe; S3: Slide the jack (5) and adjust the height of the output end of the jack (5). Measure with a level ruler to ensure that the two steel pipes are in a horizontal state and the inner diameters of the two steel pipes are on the same horizontal line, ensuring that the weld misalignment meets the requirements. S4: Weld the top and front and rear sides of the annular weld between the steel pipes firmly; S5: The jack (5) on the lower side of the rotating seat (7) is simultaneously raised, so that the rotating seat (7) lifts up the steel pipe, supports the steel pipe and rotates it, so that the bottom of the annular weld is rotated upward to a height convenient for welding, and then the remaining unwelded position is welded and fixed.

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