Rolling welding device for stainless steel on inner layer of composite welded pipe

Abstract

The invention discloses a composite welded pipe inner layer stainless steel rolling welding device, and belongs to the technical field of pipeline welding, the composite welded pipe inner layer stainless steel rolling welding device comprises a composite steel pipe, a rolling welding device is arranged below inner burrs to be rolled and welded on the inner side wall of the composite steel pipe, the rolling welding device comprises a contraction sliding rail, and a rolling blade mechanism is slidably arranged in the contraction sliding rail; a telescopic mechanism is arranged on the right side of the telescopic sliding rail, the telescopic end of the telescopic mechanism is connected with a rolling blade mechanism, and a burr removing mechanism is arranged at the end, away from the rolling blade mechanism, of the telescopic mechanism. According to the rolling welding device for the inner-layer stainless steel of the composite welded pipe, forging and welding of the inner-layer stainless steel of the inner-layer stainless steel bimetallic composite welded pipe can be achieved, the whole welding process of the inner layer and the outer layer is completed on line, and the offline welding process is replaced.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline welding, and particularly relates to a rolling welding device for the inner layer of stainless steel of a composite welded pipe. Background Art

[0002] A stainless steel composite welded pipe is a composite steel pipe made of stainless steel composite plates, produced through a variety of equipment and processes, combining the corrosion resistance of stainless steel and the advantages of other metal materials. When using a high-frequency welded pipe production line to produce stainless steel composite welded pipes, due to the different thicknesses of the two layers of metal, the stainless steel is extruded and turned over to both sides of the inner weld by the flowing metal extruded by the carbon steel during the extrusion welding process, and opposite forging welding cannot be achieved. Based on this, the present invention proposes a rolling welding device for the inner layer of stainless steel of a composite welded pipe to solve the above welding problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a rolling welding device for the inner layer of stainless steel of a composite welded pipe to solve the problems mentioned above.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A rolling welding device for the inner layer of stainless steel of a composite welded pipe of the present invention includes a composite steel pipe. A rolling welding device is provided below the inner burr to be roll-welded on the inner side wall of the composite steel pipe. The rolling welding device includes a retractable slide rail. A roll blade mechanism is slidably provided inside the retractable slide rail. An expansion mechanism is provided at the right side position of the retractable slide rail. The expansion end of the expansion mechanism is connected to the roll blade mechanism. A burr removal mechanism is provided at the end of the expansion mechanism away from the roll blade mechanism.

[0006] Further, the retractable slide rail includes a retractable slide rail body that cooperates with the composite steel pipe. A retractable slide rail groove is formed on the upper end surface of the retractable slide rail body. The size of the opening of the retractable slide rail groove gradually becomes smaller along the working direction. A support slide plate installation groove is formed on the lower end surface of the retractable slide rail body. A support slide plate is provided in the support slide plate installation groove. The support slide plate is in frictional contact with the inner side wall of the composite steel pipe.

[0007] Further, the roll blade mechanism includes right roll blade supports and left roll blade supports that are alternately distributed front and back. A right support gland is provided on the right roll blade support. A left support gland is provided on the left roll blade support. The right support gland and the left support gland are alternately distributed front and back. Roll blades are provided on the upper end surfaces of the right roll blade supports and the left roll blade supports.

[0008] Furthermore, the right rolling blade support and the left rolling blade support have the same structure, both including a support body. A rolling blade mounting frame is provided at the top of the support body. An arc-shaped groove 1 is opened at the center position of the support body. A protrusion is integrally formed on the end face of the support body that contacts the right support cover / left support cover. A through hole 1 is opened on the support body.

[0009] Furthermore, the right support cover and the left support cover have the same structure, both including a cover body. An arc-shaped groove 2 that matches the arc-shaped groove 1 is opened at the center position of the cover body. A groove that matches the protrusion is opened on the end face of the cover body that contacts the support body. A through hole 2 that matches the through hole 1 is opened on the support body. The through hole 1 and the through hole 2 are connected together by a connecting piece.

[0010] Furthermore, the rolling blade is arranged on the right rolling blade support / left rolling blade support through a blade cover. The blade cover is fixedly connected to the right rolling blade support / left rolling blade support through a blade mounting compression screw.

[0011] Furthermore, the telescopic mechanism includes an oil cylinder body. The left and right ends of the oil cylinder body are symmetrically provided with an oil cylinder front end cover and an oil cylinder rear end cover. A cylinder rod is provided at the center position of the oil cylinder front end cover. The cylinder rod is connected to the rolling blade mechanism.

[0012] Furthermore, the front end of the pressing blade mechanism is connected to the cylinder rod through a cylinder rod compression nut.

[0013] Furthermore, the burr removal mechanism includes a scraping tool holder. A scraping ring tool holder is provided on the side of the scraping tool holder close to the inner burr to be rolled and welded. A scraping ring tool is provided at the center position of the scraping ring tool holder. The burr after extrusion welding is cut off by the scraping ring tool.

[0014] Furthermore, an impedance component is provided at one end of the pressing blade mechanism away from the telescopic mechanism.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are:

[0016] In the inner layer stainless steel roll welding device for composite welded pipes of the present invention, the rolling blade mechanism moves along the contraction slide rail under the push of the telescopic mechanism to realize the forging and welding of the inner layer stainless steel, and the burr after extrusion welding can also be removed by the burr removal mechanism. In short, the inner layer stainless steel roll welding device for composite welded pipes of the present invention can solve the forging and welding of the inner layer stainless steel of the inner layer stainless steel bimetal composite welded pipe, complete the entire welding process of the inner and outer layers online, and replace the offline welding process. Description of the Drawings

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is the front view of the inner layer stainless steel roll welding device for the composite welded pipe of the present invention;

[0019] Figure 2 It is the sectional view of the inner layer stainless steel roll welding device for the composite welded pipe of the present invention;

[0020] Figure 3 It is the partial structure schematic diagram of the inner layer stainless steel roll welding device for the composite welded pipe of the present invention;

[0021] Figure 4 It is the schematic diagram of the retractable slide rail structure Figure 1 ;

[0022] Figure 5 It is the schematic diagram of the retractable slide rail structure Figure 2 ;

[0023] Figure 6 It is the exploded view of the installation of the right roll blade support / left roll blade support;

[0024] Figure 7 It is the schematic diagram of the structure of the right roll blade support / left roll blade support;

[0025] Figure 8 It is the schematic diagram of the structure of the right support gland / left support gland;

[0026] Figure 9 It is the side view of the retractable slide rail;

[0027] Explanation of reference numerals in the drawings: 1. Composite steel pipe; 2. Inner burr to be roll welded; 3. Retractable slide rail; 4. Right roll blade support; 5. Left roll blade support; 6. Right support gland; 7. Left support gland; 8. Roll blade; 9. Blade gland; 10. Blade installation compression screw; 11. Support slide plate; 12. Oil cylinder body; 13. Front end cover of the oil cylinder; 14. Rear end cover of the oil cylinder; 15. Cylinder rod; 16. Cylinder rod compression nut; 17. Scraping tool holder, 18. Impedance component; 19. Scraping ring knife; 20. Scraping ring knife seat; 21. Burr after extrusion welding;

[0028] 301. Retractable slide rail body; 302. Retractable slide rail groove; 303. Support slide plate installation groove; 304. High-pressure oil inlet pipeline; 305. High-pressure oil outlet pipeline; 306. High-pressure water pipeline;

[0029] 401. Support body; 402. Roll blade mounting bracket; 403. First arc groove; 404. Projection; 405. First through hole;

[0030] 601. gland body; 602. second arc-shaped groove; 603. groove; 604. second through hole; 605. connecting piece. Specific implementation manner

[0031] As Figure 1 , 2 , as shown in Fig. 3, a rolling welding device for the inner layer stainless steel of a composite welded pipe includes a composite steel pipe 1. A rolling welding device is installed below the inner burr 2 to be roll-welded on the inner side wall of the composite steel pipe 1. The rolling welding device includes a retractable slide rail 3. A rolling blade mechanism is slidably installed inside the retractable slide rail 3. An expansion mechanism is installed at the right side position of the retractable slide rail 3. The expansion end of the expansion mechanism is connected to the rolling blade mechanism. A burr removal mechanism is installed at the end of the expansion mechanism away from the rolling blade mechanism.

[0032] The expansion mechanism includes an oil cylinder body 12. The left and right ends of the oil cylinder body 12 are symmetrically installed with an oil cylinder front end cover 13 and an oil cylinder rear end cover 14. A cylinder rod 15 is installed at the central position of the oil cylinder front end cover 13. The cylinder rod 15 is connected to the rolling blade mechanism. The front end of the pressing blade mechanism is connected to the cylinder rod 15 through a cylinder rod pressing nut 16.

[0033] The burr removal mechanism includes a scraping tool holder 17. A scraping ring tool holder 20 is installed on the side of the scraping tool holder 17 close to the inner burr 2 to be roll-welded. A scraping ring tool 19 is installed at the central position of the scraping ring tool holder 20. The burr 21 after extrusion welding is cut off by the scraping ring tool 19 and finally discharged from the middle of the scraping ring tool 19.

[0034] As Figure 4 , 5 , as shown, the retractable slide rail 3 includes a retractable slide rail body 301 that matches the composite steel pipe 1. A retractable slide rail groove 302 is opened on the upper end surface of the retractable slide rail body 301. The size of the notch of the retractable slide rail groove 302 gradually becomes smaller along the working direction. A support slide plate installation groove 303 is opened on the lower end surface of the retractable slide rail body 301. A support slide plate 11 is installed in the support slide plate installation groove 303. The support slide plate 11 is in frictional contact with the inner side wall of the composite steel pipe 1. Specifically, the support slide plate 11 is a piston structure. The piston is pushed up and down by high-pressure water, thereby adjusting the friction force between the support slide plate 11 and the inner side wall of the composite steel pipe 1 to meet the welding requirements. As Figure 9As shown, inside the retractable slide rail body 301, there are also provided a high-pressure oil inlet pipeline 304, a high-pressure oil outlet pipeline 305, and a high-pressure water pipeline 306. The high-pressure oil inlet pipeline 304 and the high-pressure oil outlet pipeline 305 are respectively connected to the cylinder block 12 to drive the operation of the cylinder assembly. This is prior art and will not be elaborated here. The high-pressure water pipeline 306 is connected to the installation groove 303, and the support sliding plate 11 is driven to slide downward by high-pressure water. This path uses high-pressure water for single-pipeline unidirectional drive. When the support sliding plate 11 is reset, after the high-pressure water stops pressurizing, the entire device moves downward under its own gravity, and the water in the installation groove 303 is squeezed out, and the support sliding plate 11 is reset. By using high-pressure water to replace hydraulic oil to push the support sliding plate 11, the pollution problem caused by hydraulic oil leakage is solved.

[0035] As Figure 6 shown, the rolling blade mechanism includes right rolling blade supports 4 and left rolling blade supports 5 that are alternately distributed front and back. A right support gland 6 is installed on the right rolling blade support 4, and a left support gland 7 is installed on the left rolling blade support 5. The right support gland 6 and the left support gland 7 are alternately distributed front and back. Rolling blades 8 are installed on the upper end faces of both the right rolling blade support 4 and the left rolling blade support 5.

[0036] As Figure 7 shown, the right rolling blade support 4 and the left rolling blade support 5 have the same structure, and both include a support body 401. A rolling blade mounting frame 402 is installed on the top of the support body 401. An arc-shaped groove 403 is provided at the central position of the support body 401. A protrusion 404 is integrally formed on the end face of the support body 401 that contacts the right support gland 6 / left support gland 7. A through hole 405 for connection is provided on the support body 401.

[0037] As Figure 8 shown, the right support gland 6 and the left support gland 7 have the same structure, and both include a gland body 601. An arc-shaped groove 602 that matches the arc-shaped groove 403 is provided at the central position of the gland body 601. The arc-shaped groove 403 and the arc-shaped groove 602 cooperate to form a central hole structure for the cylinder rod 15 to pass through. A groove 603 that matches the protrusion 404 is provided on the end face of the gland body 601 that contacts the support body 401, which plays a positioning role and enables quick installation. A through hole 604 that matches the through hole 405 is provided on the support body 401. The through hole 405 and the through hole 604 are connected together by a connecting member 605. Specifically, the connecting member loosely connects the through hole 405 and the through hole 604, leaving a movable space for the left and right rolling blade supports to approach and move away from each other.

[0038] The rolling blade 8 is installed on the right rolling blade support 4 / left rolling blade support 5 through the blade gland 9, and the blade gland 9 is fixedly connected with the right rolling blade support 4 / left rolling blade support 5 through the blade mounting compression screw 10.

[0039] An impedance component 18 is installed at one end of the pressing blade mechanism away from the telescopic mechanism, which plays roles such as assisting welding and improving high-frequency heating efficiency. This is a prior art means and will not be elaborated here.

[0040] The operation process of the present invention is as follows:

[0041] First, the support slide plate 11 moves away from the composite steel pipe 1, and the rolling welding device is moved inside the composite steel pipe 1 to the position where pressure welding is required; then, the support slide plate 11 presses the inner wall of the composite steel pipe 1, making the retractable slide rail 3 fixed. At this time, the left and right rolling blade supports are located on the right side of the retractable slide rail 3, that is, the side with a larger notch; then, the oil cylinder is started, and the cylinder rod 15 drives the left and right rolling blade supports to gradually move towards the left side of the retractable slide rail 3, that is, the side with a smaller notch. During the advancing process, the two rolling blades 8 gradually contract and contact along the inner wall of the steel pipe, and the inner burrs 2 of the rolling welding are squeezed and welded; finally, after the welding is completed, the support slide plate 11 returns to its original position, and the cylinder rod 15 returns to its original position. The rolling welding device continues to advance. When advancing, the two rolling blades 8 are separated from each other under the push of the burrs, and the burrs 21 after the extrusion welding are cut off by the scraping ring knife 19 and finally discharged from the middle of the scraping ring knife 19.

[0042] The above-described embodiments are only descriptions of the preferred modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A composite welded pipe inner layer stainless steel rolling welding device, characterized in that: The invention comprises a composite steel pipe (1), wherein a rolling welding device is arranged below an inner burr (2) to be rolled and welded on the inner wall of the composite steel pipe (1), wherein the rolling welding device comprises a retractable slide rail (3), wherein a rolling blade mechanism is slidably arranged inside the retractable slide rail (3), wherein a telescopic mechanism is arranged on the right side of the retractable slide rail (3), wherein the telescopic end of the telescopic mechanism is connected to the rolling blade mechanism, and a burr removal mechanism is arranged at one end of the telescopic mechanism away from the rolling blade mechanism.

2. The inner layer stainless steel rolling welding device of the composite welded pipe according to claim 1 is characterized in that: The retractable slide rail (3) comprises a retractable slide rail body (301) matched with the composite steel pipe (1), and a retractable slide rail groove (302) is provided on the upper end surface of the retractable slide rail body (301), and the size of the groove of the retractable slide rail groove (302) gradually decreases along the working direction; a support slide plate installation groove (303) is provided on the lower end surface of the retractable slide rail body (301), and a support slide plate (11) is arranged in the support slide plate installation groove (303), and the support slide plate (11) is in friction contact with the inner wall of the composite steel pipe (1).

3. The inner layer stainless steel rolling welding device of the composite welded pipe according to claim 1 is characterized in that: The rolling blade mechanism comprises a right rolling blade support (4) and a left rolling blade support (5) which are alternately arranged front and back, the right rolling blade support (4) is provided with a right support pressure cover (6), the left rolling blade support (5) is provided with a left support pressure cover (7), and the right support pressure cover (6) and the left support pressure cover (7) are alternately arranged front and back; and rolling blades (8) are provided on the upper end surfaces of the right rolling blade support (4) and the left rolling blade support (5).

4. The inner layer stainless steel rolling welding device of the composite welded pipe according to claim 3 is characterized in that: The right rolling blade support (4) and the left rolling blade support (5) have the same structure, and both include a support body (401). A rolling blade mounting frame (402) is arranged on the top of the support body (401). An arc groove (403) is provided at the center of the support body (401). A protrusion (404) is integrally formed on the end surface of the support body (401) that contacts the right support pressure cover (6) / left support pressure cover (7); and a through hole (405) is provided on the support body (401).

5. The inner layer stainless steel rolling welding device of the composite welded pipe according to claim 4 is characterized in that: The right support pressure cover (6) and the left support pressure cover (7) have the same structure and both include a pressure cover body (601); an arc groove 2 (602) matching the arc groove 1 (403) is provided at the center of the pressure cover body (601); a groove (603) matching the protrusion (404) is provided on the contact end surface between the pressure cover body (601) and the support body (401); a through hole 2 (604) matching the through hole 1 (405) is provided on the support body (401); and the through hole 1 (405) and the through hole 2 (604) are connected together by a connecting piece (605).

6. The inner layer stainless steel rolling welding device of the composite welded pipe according to claim 3 is characterized in that: The rolling blade (8) is arranged on the right rolling blade support (4) / left rolling blade support (5) via a blade pressure cover (9), and the blade pressure cover (9) is fixedly connected to the right rolling blade support (4) / left rolling blade support (5) via a blade installation clamping screw (10).

7. The inner layer stainless steel rolling welding device of the composite welded pipe according to claim 1 is characterized in that: The telescopic mechanism comprises a cylinder body (12), a cylinder front end cover (13) and a cylinder rear end cover (14) are symmetrically arranged at the left and right ends of the cylinder body (12), a cylinder rod (15) is arranged at the center of the cylinder front end cover (13), and the cylinder rod (15) is connected to the rolling blade mechanism.

8. The inner layer stainless steel rolling welding device of the composite welded pipe according to claim 7 is characterized in that: The front end of the blade pressing mechanism is connected to the cylinder rod (15) via a cylinder rod clamping nut (16).

9. The inner layer stainless steel rolling welding device of the composite welded pipe according to claim 1 is characterized in that: The burr removal mechanism comprises a scraper seat (17), a scraper ring seat (20) is arranged on one side of the scraper seat (17) close to the internal burr (2) to be roll-welded, a scraper ring (19) is arranged at the center of the scraper ring seat (20), and the burr (21) after extrusion welding is removed by the scraper ring (19).

10. The inner layer stainless steel rolling welding device of the composite welded pipe according to claim 1, characterized in that: An impedance component (18) is arranged at one end of the blade pressing mechanism away from the telescopic mechanism.

Images