A corrosion-resistant stainless steel pipe and its welding device

Abstract

This invention relates to the field of pipe manufacturing and welding technology, specifically to a corrosion-resistant stainless steel pipe and its welding device. The stainless steel pipe of this invention comprises an outer pipe, an inner pipe fitted inside the outer pipe, a skeleton disposed between the inner and outer pipes, and an installation ring disposed between the outer and inner pipes. Both ends of the inner pipe are fixedly provided with annular arc plates. One annular arc plate has an annular slot at its end, and the other annular arc plate has an annular insert plate fixed at its end. The annular arc plates, with their opposite ends interlocked, can isolate the welding area between the two pipe sections, preventing the transported fluid from contacting the welding area and causing corrosion. The welding device of this invention includes a welding mechanism and a feeding mechanism, which can simultaneously clean the surface of the welding area before welding, weld the welding area, and clean the welding slag in the welding area, and also perform position correction before pipe body docking.

Description

Technical Field

[0001] This invention relates to the field of pipe manufacturing and welding technology, specifically a corrosion-resistant stainless steel pipe and its welding apparatus. Background Technology

[0002] Stainless steel pipe is a hollow, long, round steel material, widely used in industrial pipelines for transporting fluids in petroleum, chemical, medical, food, light industry, and machinery, as well as in mechanical structural components. Generally, when stainless steel pipes are used to transport fluids or as structural components, they often need to have excellent corrosion resistance. Furthermore, during the laying of long pipelines, welding is often required to extend the pipeline further.

[0003] The prior art discloses a Chinese patent with publication number CN 218152766 U: a corrosion-resistant stainless steel pipe, which discloses that the stainless steel pipe body has a ring of inwardly squeezed pits near the opening, which improves the structural strength of the connection.

[0004] However, the aforementioned existing technology still has certain drawbacks. During use, after the two pipe sections are welded, the fluid being transported will directly contact the weld surface, which can easily cause corrosion in the welded area. Furthermore, the pit design can easily trap a large amount of fluid that cannot be discharged, which can cause corrosion of the pipe body if left for a long time.

[0005] The prior art discloses a Chinese patent with publication number CN 117773449 A: a steel pipe welding device, which discloses a rotary mechanism and a robot slidably mounted on the rotary mechanism. By having multiple welding robots weld steel pipes simultaneously, the welding efficiency is improved. Furthermore, by having the welding robots make circular motion relative to the supporting ring, the position of the welding robots can be easily adjusted.

[0006] However, the aforementioned existing technology still has certain drawbacks. During use, it is necessary to manually correct the docking position of the pipes to be welded. In addition, before and after welding, it is also necessary to clean the surface of the welding area of ​​the pipes and remove the welding slag, resulting in low overall processing efficiency. Summary of the Invention

[0007] The purpose of this invention is to provide a corrosion-resistant stainless steel pipe and its welding device to solve the problems mentioned in the background art.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A corrosion-resistant stainless steel pipe, the corrosion-resistant stainless steel pipe comprising:

[0010] The tube body consists of an outer tube, an inner tube fitted inside the outer tube, a skeleton set between the outer side of the inner tube and the inner side of the outer tube, and a mounting ring set between the corresponding ends of the outer tube and the inner tube. The mounting ring between the outer tube and the inner tube is fixed by locking bolts.

[0011] Both ends of the inner tube are integrally formed with annular arc plates. One end of the annular arc plate is provided with an annular slot, and the end of the other annular arc plate is fixed with an annular insert plate that matches the annular slot.

[0012] The present invention also provides a welding apparatus for welding adjacent sections of the aforementioned corrosion-resistant stainless steel pipe, the welding apparatus comprising:

[0013] A welding mechanism, comprising a support, a ring frame fixed to the top center of the support, a slot opened on one side of the support, a welding drive component mounted on the ring frame, and a welding processing assembly mounted on the welding drive component.

[0014] The feeding mechanism includes two feeding components, a bracket located at opposite ends of the two feeding components, and a correction component for synchronously correcting the position of the two pipe sections to be welded.

[0015] The base, the welding mechanism and the feeding mechanism are both installed on the top of the base, and the welding mechanism is located at the midpoint between the two feeding components.

[0016] As a preferred embodiment of the welding device for the corrosion-resistant stainless steel pipe of the present invention, the ring frame includes a ring plate fixedly connected to the support, and ring bars concentrically arranged at both ends of the inner side of the ring plate. Multiple connecting rods evenly distributed in a ring are fixedly connected between the outer sides of the two ring bars and the inner side of the ring plate.

[0017] As a preferred embodiment of the welding device for the corrosion-resistant stainless steel pipe of the present invention, the welding drive component includes a cover frame located between the opposite sides of two ring bars and a gear ring fixed in the middle of the inner side of the ring plate. Arc blocks are fixed on both sides of the cover frame. Ring grooves are opened on the opposite sides of the two ring bars to correspond to the arc blocks. The arc blocks are slidably connected to the inside of the corresponding ring grooves. Two side frames are fixed on the top of the cover frame. A gear 1 that meshes with the gear ring is rotatably installed between the two side frames. The welding processing component is installed inside the cover frame.

[0018] As a preferred embodiment of the welding device for the corrosion-resistant stainless steel pipe of the present invention, the welding processing component includes two partitions fixed inside the cover frame. The two partitions divide the inside of the cover frame into a pre-treatment area, a welding area and a post-treatment area, and the pre-treatment area, welding area and post-treatment area are distributed sequentially along the movement direction of the welding processing component.

[0019] As a preferred embodiment of the welding device for the corrosion-resistant stainless steel pipe of the present invention, a cylinder is fixedly installed at the position corresponding to the welding area on the inner side of the cover frame, a lifting plate is fixedly connected to the telescopic end of the cylinder, two partitions movably pass through the lifting plate, and a welding head is fixedly installed at the bottom of the lifting plate at the position corresponding to the middle of the welding area.

[0020] As a preferred embodiment of the welding device for the corrosion-resistant stainless steel pipe of the present invention, two lugs are fixedly provided at the bottom of the lifting plate corresponding to the position of the pretreatment area, an arc cover is fixedly connected between the two lugs, and a grinding roller is rotatably installed between the two lugs inside the arc cover.

[0021] Both ends of the outer side of the arc cover are fixedly connected to mounting brackets. The bottom of each mounting bracket has a groove. A cleaning block is fixedly embedded in the groove of the mounting bracket near the welding area. An arc groove is formed inside the groove of the mounting bracket away from the welding area. A ball head rod is movably fitted inside the arc groove. The spherical end of the ball head rod passes through the ear seat and the cover frame in sequence. A cleaning block is movably embedded in the groove of the mounting bracket away from the welding area. One end of the ball head rod is fixedly connected to the cleaning block, and the end of the cleaning block away from the ball head rod is fixedly connected to the inner side of the corresponding end of the arc groove by a straight spring.

[0022] As a preferred embodiment of the welding device for the corrosion-resistant stainless steel pipe of the present invention, wherein: two lugs are located at the bottom of the lifting plate corresponding to the post-processing area, and an arc cover is fixedly connected between the two lugs; a grinding roller is rotatably installed between the two lugs inside the arc cover.

[0023] A side plate is fixedly connected between the two ear seats on one side. A shaft is rotatably installed in the middle of the side plate. A gear is fixedly sleeved on the outside of the shaft. Two limiting frames are fixedly connected to one side of the side plate, which are arranged symmetrically about the shaft. A rack that meshes with the gear is movably inserted into the inside of each limiting frame. An L-shaped scraper is fixedly installed at the bottom of each rack.

[0024] Two racks are fixedly connected at opposite ends to a straight rod and a ball-head rod extending through to the outside of the cover frame. An I-shaped ring is movably sleeved on the outside of both the straight rod and the ball-head rod. Both I-shaped rings are movably mounted on the cover frame. A straight spring is movably sleeved on the outside of both the straight rod and the ball-head rod, and is fixedly connected to the corresponding rack and the I-shaped ring.

[0025] As a preferred embodiment of the welding device for the corrosion-resistant stainless steel pipe of the present invention, the welding mechanism further includes a track ring fixed inside the two ring bars. The track ring is composed of a ring plate and a plurality of inclined tops fixed on one side of the ring plate in a ring-shaped and uniformly distributed manner. The spherical ends of the ball head rod one and the ball head rod two extend into the corresponding track ring.

[0026] As a preferred embodiment of the welding device for the corrosion-resistant stainless steel pipe of the present invention, the correction component includes a straight guide groove opened on the top of the base and a vertical frame fixed on the top of the base at one end of the straight guide groove. Slide seats are slidably connected inside the two straight guide grooves. L-shaped frames are fixedly connected to the top of the two slide seats. End plates are fixedly connected to one end of the two L-shaped frames. A cylinder is fixedly installed between the vertical frame and the L-shaped frame, which are arranged in a corresponding manner.

[0027] The correction assembly also includes a pusher fixed to the top of the two slides and two dovetail grooves opened on the top of the base. A toggle and a reset member for pushing the toggle to reset are slidably installed inside the two dovetail grooves.

[0028] The beneficial effects of this invention are:

[0029] After welding, the stainless steel pipe of the present invention can be isolated from the welded area between the two pipe sections by using an annular arc plate that interlocks the opposite ends of the two pipe sections. This avoids the fluid from directly contacting the welded area during the fluid transport process, thus preventing corrosion of the welded area. In addition, the anti-corrosion layer set on the inner and outer sides of the pipe can improve the corrosion resistance of the stainless steel pipe and increase its service life.

[0030] The stainless steel pipe of the present invention, through the design of the insertion tube, insertion hole, inclined liquid tank and inclined setting of the inner side of the two pipe sections at the joint end, can form an inclined structure between the adjacent pipe sections after the joint is completed, which solves the corrosion problem caused by the annular arc plate added at both ends of the inner pipe, which causes the fluid to remain after the transportation is completed and cannot go out.

[0031] 3. In the process of rotary welding of the circumferential seam between two pipe sections using the welding processing component that rotates with the cover frame, the present invention can simultaneously clean the surface of the welding area before welding, weld the welding area, and clean the welding slag in the welding area. This not only improves the welding quality but also ensures a smooth weld surface, enhances the aesthetics of the welding area, and increases production efficiency.

[0032] 4. During the process of pushing two sections of pipe to be welded to the welding station using a feeding mechanism, the present invention can automatically perform position correction on both sections of pipe at the same time, ensuring that the inserts on the two sections of pipe are set horizontally and collinearly, so that the two sections of pipe to be welded can be accurately inserted and aligned without manual adjustment, which further improves the processing efficiency. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the stainless steel pipe of the present invention;

[0035] Figure 2 This is the present invention. Figure 1 Enlarged schematic diagram of section A in the middle;

[0036] Figure 3 This is the present invention. Figure 1 Enlarged schematic diagram of section B;

[0037] Figure 4 This is a schematic diagram of the overall structure of the welding device of the present invention;

[0038] Figure 5 This is a schematic diagram of the overall structure of the welding mechanism of the welding device of the present invention;

[0039] Figure 6 This is a schematic diagram of the welding mechanism of the welding device of the present invention.

[0040] Figure 7 This is a partial structural diagram of the welding mechanism of the welding device of the present invention;

[0041] Figure 8 This is a schematic diagram of the welding processing component structure of the welding device of the present invention;

[0042] Figure 9 This is the present invention. Figure 8 Overall bottom view in the middle;

[0043] Figure 10 This is the present invention. Figure 9 Schematic diagram of the cross section along line B'-B';

[0044] Figure 11 This is the present invention. Figure 9 Schematic diagram of the cross section along line A'-A';

[0045] Figure 12 This is a schematic diagram of the overall structure of the feeding mechanism of the welding device of the present invention;

[0046] Figure 13 This is a schematic diagram of the welding device of the present invention for welding two sections of stainless steel pipe.

[0047] Figure 14 This is a schematic diagram of the structure of two adjacent sections of the stainless steel pipe after welding.

[0048] The attached figures are labeled as follows: 1. Outer tube; 2. Inner tube; 201. Annular arc plate; 202. Annular slot; 203. Annular insert plate; 3. Frame; 4. Mounting ring; 5. Insertion hole; 6. Insertion tube; 7. Liquid tank; 8. Welding mechanism; 81. Support; 82. Groove; 83. Ring frame; 831. Ring plate; 832. Ring bar; 84. Welding drive component; 841. Cover frame; 842. Arc block; 843. Annular groove; 844. Gear one; 845. Gear ring; 85. Track ring; 86. Welding processing assembly; 861. Partition plate; 862. Lifting plate; 863. Cylinder one; 864. Welding head; 865. Ear seat one; 866. Arc cover one; 867. Grinding roller one; 8 68. Mounting bracket; 869. Ball head rod 1; 8610. Straight spring 1; 8611. Ear seat 2; 8612. Arc cover 2; 8613. Grinding roller 2; 8614. Side plate; 8615. Limiting frame; 8616. Gear 2; 8617. Rack; 8618. L-shaped scraper; 8619. Straight rod; 8620. Ball head rod 2; 8621. I-shaped ring cylinder; 8622. Straight spring 2; 9. Feeding mechanism; 91. Feeding component; 92. Bracket; 93. Correction assembly; 931. Straight guide groove; 932. Slide seat; 933. L-shaped frame; 934. Cylinder 2; 935. End plate; 936. Push seat; 937. Actuating component; 938. Reset component; 10. Base. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] The welding device of the present invention belongs to a part of the intelligent manufacturing equipment industry. It is a type of metal material welding equipment and is mainly used for the production welding of two sections of stainless steel pipe. Specifically, it is used for the position correction of two sections of stainless steel pipe before insertion and the rotary welding after insertion during the welding process. Example

[0051] Refer to the instruction manual appendix Figures 1-3This embodiment is the first embodiment of the present invention, providing a corrosion-resistant stainless steel pipe. The pipe body consists of an outer pipe 1, an inner pipe 2 sleeved inside the outer pipe 1, a skeleton 3 disposed between the outer side of the inner pipe 2 and the inner side of the outer pipe 1, and mounting rings 4 disposed between corresponding ends of the outer pipe 1 and the inner pipe 2. Multiple skeletons 3 are equidistantly arranged on both the outer side of the inner pipe 2 and the inner side of the outer pipe 1, and the skeletons 3 are arranged in a one-to-one correspondence. There are two mounting rings 4, one located on the left end of the inner side of the outer pipe 1 and the other on the right end of the outer side of the inner pipe 2. The rings 4 on the left end of the inner side of the outer pipe 1 and the other on the right end of the outer side of the inner pipe 2 are... The diameter of the inner tube 2 and the outer tube 1 is equal to the width of the circumferential joint between them. The mounting ring 4 on the outer tube 1 is fixed to the skeleton 3 at the left end of the inner tube, and the mounting ring 4 on the inner tube 2 is fixed to the skeleton 3 at the right end of the outer tube by locking bolts. In addition, the inner side of the inner tube 2 is coated with epoxy resin, while the outer side of the outer tube 1 is covered with glass fiber resin (not shown in the attached figure), so as to achieve the purpose of corrosion protection for the inner and outer sides of the tube body. Furthermore, the area between the two mounting rings on the inner side of the outer tube 1 and the outer side of the inner tube 2 is covered with sound-absorbing cotton and heat-insulating cotton respectively (used for conveying fluids with temperature requirements).

[0052] Both ends of the inner tube 2 are integrally formed with annular arc plates 201. One of the annular arc plates 201 has an annular slot 202 at its end, and the other annular arc plate 201 has an annular insert plate 203 that is adapted to the annular slot 202 at its end.

[0053] It should be noted that during the assembly of the inner tube 2 and the outer tube 1, the end of the inner tube 2 without the mounting ring 4 is inserted into the end of the outer tube 1 without the mounting ring 4. After insertion until it contacts the mounting ring on the inner side of the outer tube 1, the mounting holes are aligned and then secured with locking bolts. When welding the two sections of stainless steel pipe after the outer tube 1 and inner tube 2 are assembled, the annular insert plate 203 on the annular arc plate 201 at the end of one section of the pipe is inserted into the annular slot 202 on the annular arc plate 201 at the end of the other section of the pipe. The welding between the two sections of the outer tube 1 is completed with the two pipe sections in a tight fit. After welding, the stainless steel pipe body can be separated from the welding area between the two pipe sections by the semi-circular protrusion formed by the two interlocking annular arc plates 201, avoiding direct contact between the fluid and the welding area during fluid transportation, which would cause corrosion of the welding area. In conjunction with the anti-corrosion layer set on the inner and outer sides of the pipe body, the corrosion resistance of the stainless steel pipe body is improved, and the service life of the stainless steel pipe body is increased.

[0054] Furthermore, such as Figures 1-3As shown, an insert 6 is integrally formed on the annular arc plate 201 at one end of the inner tube 2. The insert 6 is connected to the inner cavity of the corresponding inner tube 2. An insertion hole 5 adapted to the insert 6 is opened through the annular arc plate 201 at the other end of the inner tube 2. The inner side of the inner tube 2 is inclined downward from the end where the insertion hole 5 is located to the end where the insert 6 is located. An inclined liquid groove 7 communicating with the insertion hole 5 is opened on the inner side of the inner tube 2. At the same time, the inner side of the insert 6 is also set to be inclined in the same direction as the inner side of the inner tube 2. The lower end of the liquid groove 7 The liquid inlet end of the insertion tube 6 is flush with the liquid inlet end, and the high end of the liquid tank 7 is flush with the low end of the insertion tube 6. This allows an inclined structure to be formed between adjacent sections of the tube after the connection is completed. After the fluid is transported, the fluid inside the tube can be drained through the hole using this inclined structure, which prevents the fluid from accumulating and causing corrosion to the tube. In addition, a sealing gasket can be wrapped around the part of the insertion hole 5 on the outside of the insertion tube 6 to improve the sealing in the insertion state and prevent the transported fluid from leaking into the welding area and causing corrosion to the weld surface.

[0055] Furthermore, a marking line can be added to the outer side of the outer tube 1 of the pipe body at the position corresponding to the liquid tank to increase the identification of the pipe body during actual installation and use.

[0056] It should be noted that the optimized design of the joint end of the adjacent pipe sections not only solves the corrosion problem caused by the annular arc plate 201 added to both ends of the inner pipe 2, which prevents the fluid from leaving after transportation, but also avoids the fluid from leaking into the welding area and causing corrosion to the weld surface during transportation, thus further improving the corrosion resistance of the pipe during use. Example

[0057] Refer to the instruction manual appendix Figures 4-7 This embodiment is the second embodiment of the present invention, which provides a welding device for corrosion-resistant stainless steel pipes. The welding device includes a base 10 and a welding mechanism 8 fixedly installed on the top of the base 10.

[0058] The welding mechanism 8 includes a support 81, a ring frame 83 fixed at the top center of the support 81, a slot 82 opened on one side of the support 81, a welding drive 84 mounted on the ring frame 83, and a welding processing assembly 86 mounted on the welding drive 84.

[0059] It should be noted that during the welding process of adjacent pipe sections, the two pipe sections to be welded are inserted into the two ends of the ring frame 83 respectively, and the annular insert plate 203 on the annular arc plate 201 at the end of one pipe section is inserted into the annular slot 202 on the annular arc plate 201 at the end of the other pipe section. At the same time, the insert tube 6 on the annular arc plate 201 at the end of one pipe section is inserted into the insert hole 5 on the annular arc plate 201 at the end of the other pipe section. Then, the joint seam of the two pipe sections after insertion is aligned with the welding processing assembly 86, and the welding driving component 84 is used to drive the welding processing assembly 86 to rotate along the ring frame 83 to complete the welding of the annular seam in the joint area.

[0060] Furthermore, such as Figure 6 As shown, the ring frame 83 includes a ring plate 831 fixedly connected to the support 81. Both ends of the inner side of the ring plate 831 are provided with ring bars 832 arranged concentrically with the ring plate 831. Multiple connecting rods in a ring-shaped uniform distribution are fixedly connected between the outer side of the two ring bars 832 and the inner side of the ring plate 831. The welding drive component 84 is slidably installed between the two ring bars 832.

[0061] Furthermore, the welding drive component 84 includes a cover frame 841 located between the opposite sides of the two ring bars 832 and a gear ring 845 fixed in the middle of the inner side of the ring plate 831. Arc blocks 842 are fixedly provided on both sides of the cover frame 841. Annular grooves 843 corresponding to the arc blocks 842 are opened on the opposite sides of the two ring bars 832, and the arc blocks 842 are slidably connected inside the corresponding annular grooves 843 to limit the movement trajectory of the cover frame 841. Two side frames are fixedly provided on the top of the cover frame 841. A gear 844 is rotatably mounted and meshes with a gear ring 845. The gear 844 is driven to rotate by a motor mounted on the outside of one of the side frames. The welding processing assembly 86 is installed inside the cover frame 841. The opening end of the cover frame 841 is arc-shaped, and the radius of the arc at the opening end of the cover frame 841 is equal to the outer radius of the pipe body to be welded. This allows a movable isolation cavity to be formed between the cover frame 841 and the welding area during the welding process, ensuring the cleanliness of the working environment during welding.

[0062] It should be noted that during the welding of adjacent pipe sections, after the two pipe sections to be welded are inserted from the two ring bars 832 and the joint seam of the two pipe sections is aligned with the welding processing component 86, the motor is started to drive the gear 844 to rotate. Utilizing the meshing between the gear 844 and the gear ring 845, the gear 844, under the constraint of the gear ring 845, the arc block 842, and the annular groove 843, drives the cover frame 841 to perform circumferential motion, thereby driving the welding processing component 86 installed inside the cover frame 841 to complete the welding of the annular seam of the joint area of ​​the two pipe sections.

[0063] Furthermore, such as Figures 7-11 As shown, the welding processing assembly 86 includes two partitions 861 fixed inside the cover frame 841. The two partitions 861 divide the inside of the cover frame 841 into a pre-processing area, a welding area, and a post-processing area. The pre-processing component, welding component, and post-processing component are respectively installed in the corresponding areas inside the cover frame 841. The pre-processing area, welding area, and post-processing area are distributed sequentially along the movement direction of the welding processing assembly 86, so that the three steps of cleaning the welding surface before welding, welding the welding surface, and treating the welding slag after welding are carried out synchronously, thereby improving production efficiency.

[0064] Furthermore, a cylinder 863 is fixedly installed on the inner side of the cover frame 841 at the position corresponding to the welding area. A lifting plate 862 is fixedly connected to the telescopic end of the cylinder 863. Both partitions 861 movably pass through the lifting plate 862. A welding head 864 is fixedly installed at the bottom of the lifting plate 862 at the position corresponding to the middle of the welding area. The welding head 864 is a conventional component on existing welding equipment and will not be described in detail here. This part constitutes the welding component. During the welding process, the lifting plate 862 is raised and lowered by the cylinder 863, thereby driving the pre-processing component, welding component and post-processing component to move synchronously and complete the corresponding processing actions with the movement of the cover frame 841.

[0065] Furthermore, two lugs 865 are fixedly installed at the bottom of the lifting plate 862 corresponding to the position of the pre-processing area. An arc cover 866 is fixedly connected between the two lugs 865. Inside the arc cover 866, a grinding roller 867 is rotatably installed between the two lugs 865. During the rotation of the grinding roller 867, the part of the grinding roller 867 that contacts the tube is always exposed outside the arc cover 866. Both ends of the arc cover 866 are set as wedge-shaped structures to clean the debris remaining on the surface of the grinding roller 867 during the grinding process, thereby improving the grinding quality. The grinding roller 867 is driven to rotate by a motor installed on the outside of one of the lugs 865.

[0066] Both ends of the outer side of the arc cover 866 are fixedly connected to mounting brackets 868. Each mounting bracket 868 has a groove at its bottom. A cleaning block is fixedly embedded in the groove at the bottom of the mounting bracket 868 closer to the welding area. An arc groove is formed inside the groove at the bottom of the mounting bracket 868 further away from the welding area. A ball-head rod 869 is movably fitted inside the arc groove. The spherical end of the ball-head rod 869 passes through the lug seat 865 and the cover frame 841. Since the lug seat 865 moves up and down with the lifting plate 862, a through slot is formed on the side of the cover frame 841 corresponding to the ball-head rod 869 to ensure the ball-head rod 869... The lifting plate 862 will not be obstructed from lifting. The bottom groove of the mounting bracket 868, which is far from the welding area, is movably fitted with a cleaning block 2. One end of the ball head rod 869 located inside the arc groove is fixedly connected to the cleaning block 2. The end of the cleaning block 2 away from the ball head rod 869 is fixedly connected to the inner side of the corresponding end of the arc groove by a straight spring 8610. The outer diameter of the straight spring 8610 is larger than the opening width of the arc groove, which can effectively prevent the straight spring 8610 from being misaligned during the extrusion process, thus affecting the service life of the straight spring 8610. This part describes the pretreatment component.

[0067] Furthermore, at the bottom of the lifting plate 862 corresponding to the post-processing area, there are two ear seats 8611. An arc cover 8612 is fixedly connected between the two ear seats 8611. Inside the arc cover 8612, there is a grinding roller 8613 that is rotatably installed between the two ear seats 8611. Similarly, the structural settings of the arc cover 8612 and the grinding roller 8613 are the same as those of the arc cover 866 and the grinding roller 867 mentioned above, and will not be repeated here.

[0068] A side plate 8614 is fixedly connected between the two ear seats 8611 on one side. A shaft is rotatably mounted in the middle of the side plate 8614. A gear 8616 is fixedly sleeved on the outside of the shaft. Two limiting frames 8615 are fixedly connected to one side of the side plate 8614 and are arranged symmetrically about the shaft. A rack 8617 that meshes with the gear 8616 is movably inserted into the inside of each of the two limiting frames 8615. An L-shaped scraper 8618 is fixedly mounted at the bottom of each of the two racks 8617. An inclined support is added to the inner side of each of the two L-shaped scrapers 8618 to enhance the toughness of the L-shaped scrapers 8618. In addition, the end of each of the two L-shaped scrapers 8648 away from the lifting plate 862 is also rounded to improve the quality of scraping off welding slag.

[0069] Two racks 8617 are fixedly connected at opposite ends to a straight rod 8619 and a ball-head rod 8620 extending through to the outside of the cover frame 841. I-shaped ring cylinders 8621 are movably sleeved on the outer sides of both the straight rod 8619 and the ball-head rod 8620. Both I-shaped ring cylinders 8621 are movably mounted on the cover frame 841. Slots 2 are provided on both sides of the cover frame 841 at positions corresponding to the straight rod 8619 and the ball-head rod 8620. The two I-shaped ring cylinders 8621 are slidably installed inside the corresponding slots 2, ensuring that the straight rod 8619 and the ball-head rod 8620 do not obstruct the lifting movement of the lifting plate 862. Straight springs 8622 are movably sleeved on the outer sides of both the straight rod 8619 and the ball-head rod 8621, and are fixedly connected to the corresponding racks 8617 and I-shaped ring cylinders 8621. This part constitutes the post-processing component.

[0070] Furthermore, the welding mechanism 8 also includes a track ring 85 fixed inside the two ring bars 832. The track ring 85 consists of a ring plate and a plurality of inclined pins evenly distributed in a ring on one side of the ring plate. The spherical ends of the ball head rod 1 869 and the ball head rod 2 8620 both extend into the area where the inclined pins on the corresponding track ring 85 are located (see...). Figure 7 As shown in the figure, the height of the slanted top is greater than the maximum longitudinal movement distance of ball joint 869 and ball joint 8620.

[0071] It should be noted that during the welding process of the two pipe sections to be welded using the welding assembly 86 that rotates with the cover frame 841, after the two pipe sections have entered the designated welding station, the lifting plate 862 is first driven by the cylinder 863 to move towards the pipe to be welded until the grinding rollers 867 and 8613 contact the outer wall of the pipe. Then, the corresponding motor drives the gear 844 to rotate. As the cover frame 841 moves synchronously under the rotation of the gear 844, the inclined pusher on the track ring 85 will squeeze the ball end of the ball rod 869, causing the ball rod 869 to retract into the arc groove and push the cleaning block to squeeze the straight spring 8610. When the ball rod 869 disengages from the current inclined pusher, it will automatically reset under the restoring force of the straight spring 8610. Because the inertia of the straight spring 8610 when it returns to its original position will drive the ball head rod 869 to reciprocate, it will increase the frequency of wiping by the cleaning block 2 to a certain extent and improve the surface cleaning effect. Then, after contacting the next inclined top, the same motion process will continue. In this way, the cleaning block 2 can be driven to move left and right repeatedly, which can improve the cleaning of the attachments and oil film on the surface of the pipe welding area. Because it is a left and right reciprocating motion cleaning, even if there are uncleanable protrusions in the welding area of ​​the pipe (i.e., metal protrusions formed during the forming process of the pipe), they can still be cleaned. Here, the uncleanable protrusions refer to the side of the protrusion that is away from the direction of the circular motion of the cleaning block 2. Therefore, the left and right reciprocating motion of the cleaning block 2 is used to improve the cleaning effect. The cleaning block 1 and the cleaning block 2 mentioned above are wiping cotton blocks or cleaning brushes.

[0072] When the grinding roller 867 enters the area where the cleaning has been completed, the control end will control the grinding roller 867 to rotate, and complete the polishing process of the welding area of ​​the pipe body. The cleaning block will deal with the debris left on the surface of the pipe body during the polishing process, improve the front-end processing effect, and ensure the subsequent welding quality. When the welding head 864 enters the area where the front-end processing has been completed, the control end will start the welding process.

[0073] Similarly, referring to the movement process of ball head rod 869, ball head rod 8620 will also reciprocate under the action of the inclined pusher on the track ring 85. During this process, when ball head rod 8620 moves towards the tube body, it will push the corresponding rack 8617 to move synchronously. Since both racks 8617 are meshed with gear 8616, when the rack 8617 connecting ball head rod 8620 moves in a feed motion under the action of the inclined pusher, it will drive gear 8616 to rotate. The rotating gear 8616 will then drive the other rack 8617 to move closer to the tube body, thereby causing the two L-shaped scrapers 8618 to move towards each other, realizing the removal of weld slag in the welding area. During the scraping process, both straight springs 8622 are stretched. Once the ball head rod 8620 disengages from the current position of the inclined top, the two L-shaped scrapers 8618 will move in opposite directions to reset under the restoring force of the corresponding straight springs 8622. The reset process of the straight springs 8622 will also drive the L-shaped scrapers 8618 to reciprocate to a certain extent, improving the scraping effect of the weld slag. The above process is repeated after the ball head rod 8620 contacts the next inclined top. In addition, during the scraping of the weld using the L-shaped scrapers 8618, the grinding roller 8613 will rotate continuously under the drive of the corresponding motor to further grind the residual weld slag, ensuring a smooth weld surface and improving the aesthetics of the weld area.

[0074] In the above process, the working status of the pre-processing component, welding component and post-processing component can be controlled by the PLC controller to ensure the orderly and stable progress of the welding process. PLC control is a mature existing technology and will not be elaborated here. Example

[0075] Refer to the instruction manual appendix Figure 12 This embodiment is the second embodiment of the present invention. The difference between this embodiment and the second embodiment is that: the top of the base 10 is also equipped with a feeding mechanism 9 for synchronously correcting the position of the two pipe sections to be welded. The feeding mechanism 9 includes two feeding parts 91, a bracket 92 located at the opposite end of the two feeding parts 91, and a correction component 93. The welding mechanism 8 is located at the midpoint between the two feeding parts 91.

[0076] Each feeding component 91 includes an electric push rod and two straight guide rods fixedly installed on the top of the base 10. The telescopic end of the electric push rod is fixedly connected to a V-shaped plate that is movably sleeved on the outside of the straight guide rod. Both ends of the inner side of the V-shaped plate are equipped with conveyor belts for conveying the tube body. The material support part at the top of the two brackets 92 is a J-shaped plate, and the two J-shaped plates are centrally symmetrical about the center of the welding mechanism 8.

[0077] It should be noted that during the process of pushing the two sections of pipe to be welded to the welding station for welding, the two sections of pipe are placed on two J-shaped plates in a certain arrangement. Then, the position of the two sections of pipe is corrected by the correction component 93 (that is, the insertion tubes 6 on the two ends of the pipe are adjusted to be horizontally collinear), and the corrected pipe is pushed to the welding station. When the feed end of the pipe enters the area of ​​the feeding component 91, it will be fed by the conveyor belt.

[0078] Furthermore, such as Figure 12 As shown, the correction assembly 93 includes a straight guide groove 931 opened on the top of the base 10 and a vertical frame fixed on the top of the base 10 at one end of the straight guide groove 931. Slide seats 932 are slidably connected inside the two straight guide grooves 931. L-shaped frames 933 are fixedly connected to the top of the two slide seats 932. End plates 935 are fixedly connected to one end of the two L-shaped frames 933. The two end plates 935 have spherical protrusions on the side facing the tube body. A positioning rod is fixedly provided on one end plate 935 at the position of the tube body insertion hole 5. A positioning through hole is opened on the other end plate 935 at the position of the tube body insertion tube 6. After the position correction of the two tube bodies is completed, the end plate 935 will hold the corresponding tube body and stably push the tube body into the welding station. A cylinder 934 is fixedly installed between the vertical frame and the L-shaped frame 933.

[0079] The correction assembly 93 also includes a pusher 936 fixed to the top of the two slides 932 and two dovetail grooves opened on the top of the base 10. Each dovetail groove contains a sliding actuator 937 and a resetter 938 for pushing the actuator 937 back to its original position. Specifically, the pusher 936 consists of a support fixed to the top of the corresponding slide 932 and a wedge block fixed to the top of the support. The actuator 937 consists of a dovetail block slidably installed inside the dovetail groove, a vertical rod fixed to the top of the dovetail block, a triangular block fixed to the top of the vertical rod, and an inclined block fixedly sleeved on the outside of the vertical rod and horizontally coplanar with the wedge block. The resetter 938 consists of a horizontal bar fixed inside the dovetail groove and a reset spring sleeved on the outside of the horizontal bar at the end away from the pusher 936. The lowest point of the triangular block is aligned with the correction insertion tube 6 (see...). Figure 1 As shown, the insertion tube is aligned with the highest point on the outside of the lower end of the tube body, while the dovetail block is movably fitted onto the outside of the crossbar.

[0080] It should be noted that, in the initial state, one of the actuating elements 937 is located at the end of the bracket 92 away from the corresponding feeder 91, while the other actuating element is located between the bracket 92 and the corresponding feeder 91 (see [link]). Figure 4As shown), the end plate 935 will not contact or intersect with the tube body at the corresponding position before the actuating member 937 completes the tube body position correction (i.e., partial insertion occurs), while the inclined surface on the wedge block contacts the inclined surface on the inclined block at the corresponding position. In the process of using the feeding mechanism 9 to push the two tube bodies to be welded to the welding station for welding, the two tube bodies are first placed on two J-shaped plates in a certain arrangement (i.e., the inserted part on the tube body corresponds to the actuating member 937 at the position). Then, the two cylinders 934 are controlled to pull the corresponding L-shaped frame 933 to move towards each other. During this period, the two push seats 936 will move synchronously along the straight guide groove 931 with the corresponding slide seat 932.

[0081] During the opposing movement of the two pushers 936, the wedge-shaped blocks on them will press against the inclined blocks on the corresponding actuating components, causing the dovetail block on the actuating component 937 to press against the return spring on the reset component 938 along the direction of the dovetail groove. During this process, as the wedge-shaped blocks gradually press against the inclined blocks, the triangular block fixed to the top of the upright will gradually move closer to the tube body. If the insertion tube 6 is exactly located at the lower end of the tube body, the actuating component 937 will not contact the insertion tube 6 on the tube body at its current position during the feeding process along the dovetail groove. If the insertion tube 6 deviates from the lower end of the tube body at its current position... During the feeding process, the inclined surface of the triangular block will contact the insertion tube 6 on the corresponding tube body. As the triangular block continues to feed, the inclined surface of the triangular block will push the insertion tube 6, causing the tube body to rotate until the insertion tube 6 is located at the lower end of the corresponding tube body. When the feeding wedge block squeezes the inclined block to the maximum extent, the triangular block completely passes over the corresponding tube body. During the feeding process, the wedge block will prevent the inclined block after fluctuation from resetting. After the insertion tube position is corrected, the end plate 935 will abut against the end of the corresponding tube body and push the tube body closer to the welding station.

[0082] When the tube enters the area of ​​the feeding part 91 under the push of the corresponding end plate 935, the electric push rod will push the corresponding V-shaped plate upward until the conveyor belt contacts the outer wall of the tube. Then, the tube is pushed to the welding station for processing by the assistance of the transmission conveyor belt. After the welding is completed, the welded tube can be removed from the welding station by controlling the two conveyor belts to drive in the same direction.

[0083] In the above technical solution, the cylinder 863 mentioned is a single-acting cylinder of model DSA25N200; the cylinder 934 mentioned is a DSTA-3S pneumatic multi-section telescopic cylinder; and the electric actuator mentioned is an electric actuator of model HB-DJ801.

[0084] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A welding device for corrosion-resistant stainless steel pipes, characterized in that, The corrosion-resistant stainless steel pipe includes: The tube body consists of an outer tube (1), an inner tube (2) sleeved inside the outer tube (1), a skeleton (3) set between the outer side of the inner tube (2) and the inner side of the outer tube (1), and a mounting ring (4) set between the corresponding ends of the outer tube (1) and the inner tube (2). The mounting ring (4) between the outer tube (1) and the inner tube (2) is fixed by a locking bolt. Both ends of the inner tube (2) are integrally formed with annular arc plates (201). Annular slots (202) are provided at the end of one of the annular arc plates (201), and annular inserts (203) that are compatible with the annular slots (202) are fixed at the end of the other annular arc plate (201). The welding device is used to weld adjacent sections of a corrosion-resistant stainless steel pipe, characterized in that the welding device comprises: The welding mechanism (8) includes a support (81), a ring frame (83) fixed at the top center of the support (81), a slot (82) opened on one side of the support (81), a welding drive (84) mounted on the ring frame (83), and a welding processing assembly (86) mounted on the welding drive (84). The ring frame (83) includes a ring plate (831) fixedly connected to the support (81). Both ends of the inner side of the ring plate (831) are provided with ring bars (832) arranged concentrically with the ring plate (831). Multiple connecting rods in a ring-shaped and uniformly distributed manner are fixedly connected between the outer side of the two ring bars (832) and the inner side of the ring plate (831). The welding drive component (84) includes a cover frame (841) located between the opposite sides of the two ring bars (832) and a gear ring (845) fixed in the middle of the inner side of the ring plate (831). Arc blocks (842) are fixed on both sides of the cover frame (841). Annular grooves (843) are opened on the opposite sides of the two ring bars (832) and are directly opposite to the corresponding arc blocks (842). The arc blocks (842) are slidably connected to the inside of the corresponding annular grooves (843). Two side frames are fixed on the top of the cover frame (841). A gear (844) that meshes with the gear ring (845) is rotatably installed between the two side frames. The welding processing component (86) is installed inside the cover frame (841). The welding processing assembly (86) includes two partitions (861) fixed inside the cover frame (841). The two partitions (861) divide the inside of the cover frame (841) into a pre-processing area, a welding area and a post-processing area, and the pre-processing area, welding area and post-processing area are distributed sequentially along the movement direction of the welding processing assembly (86). The feeding mechanism (9) includes two feeding parts (91), a bracket (92) located at opposite ends of the two feeding parts (91), and a correction component (93) for synchronously correcting the position of the two pipe sections to be welded. The base (10) is equipped with both the welding mechanism (8) and the feeding mechanism (9) on the top of the base (10), and the welding mechanism (8) is located at the midpoint between the two feeding parts (91).

2. The welding apparatus for corrosion-resistant stainless steel pipes according to claim 1, characterized in that, A cylinder (863) is fixedly installed on the inner side of the cover frame (841) at the position corresponding to the welding area. A lifting plate (862) is fixedly connected to the telescopic end of the cylinder (863). Both partitions (861) can move through the lifting plate (862). A welding head (864) is fixedly installed at the bottom of the lifting plate (862) at the position corresponding to the middle of the welding area.

3. The welding device for corrosion-resistant stainless steel pipes according to claim 2, characterized in that, The bottom of the lifting plate (862) is fixedly provided with two ear seats (865) at the position corresponding to the pre-processing area. An arc cover (866) is fixedly connected between the two ear seats (865). Inside the arc cover (866) is a grinding roller (867) that is rotatably installed between the two ear seats (865). Both ends of the outer side of the arc cover (866) are fixedly connected to mounting brackets (868). The bottom of the two mounting brackets (868) is provided with a groove. The bottom groove of the mounting bracket (868) near the welding area is fixedly embedded with a cleaning block (1). The bottom groove of the mounting bracket (868) away from the welding area is provided with an arc groove. The ball head rod (869) is movably fitted inside the arc groove. The spherical end of the ball head rod (869) passes through the ear seat (865) and the cover frame (841) in sequence. The bottom groove of the mounting bracket (868) away from the welding area is movably embedded with a cleaning block (2). One end of the ball head rod (869) located inside the arc groove is fixedly connected to the cleaning block (2). The end of the cleaning block (2) away from the ball head rod (869) is fixedly connected to the inner side of the corresponding end of the arc groove by a straight spring (8610).

4. The welding apparatus for corrosion-resistant stainless steel pipes according to claim 3, characterized in that, The bottom of the lifting plate (862) has two ear seats (8611) at the position corresponding to the post-processing area. An arc cover (8612) is fixedly connected between the two ear seats (8611). Inside the arc cover (8612) is a grinding roller (8613) that is rotatably installed between the two ear seats (8611). A side plate (8614) is fixedly connected between the two ear seats (8611) on one side. A shaft is rotatably installed in the middle of the side plate (8614). A gear (8616) is fixedly sleeved on the outside of the shaft. Two limiting frames (8615) are fixedly connected to one side of the side plate (8614) and are arranged symmetrically about the shaft. A rack (8617) that meshes with the gear (8616) is movably inserted into the inside of each of the two limiting frames (8615). An L-shaped scraper (8618) is fixedly installed at the bottom of each of the two racks (8617). Two racks (8617) are respectively fixedly connected to a straight rod (8619) and a ball head rod (8620) extending through to the outside of the cover frame (841). Both the straight rod (8619) and the ball head rod (8620) are movably sleeved with an I-shaped ring cylinder (8621). Both I-shaped ring cylinders (8621) are movably installed on the cover frame (841). Both the straight rod (8619) and the ball head rod (8620) are movably sleeved with a straight spring (8622) that is fixedly connected to the corresponding rack (8617) and the I-shaped ring cylinder (8621).

5. The welding apparatus for corrosion-resistant stainless steel pipes according to claim 4, characterized in that, The welding mechanism (8) also includes a track ring (85) fixed inside the two ring bars (832). The track ring (85) is composed of a ring plate and a plurality of inclined tops fixed on one side of the ring plate in a ring-shaped and uniform distribution. The spherical ends of the ball head rod one (869) and the ball head rod two (8620) extend into the corresponding track ring (85).

6. The welding apparatus for corrosion-resistant stainless steel pipes according to claim 1, characterized in that, The correction assembly (93) includes a straight guide groove (931) opened on the top of the base (10) and a vertical frame fixed on the top of the base (10) at one end of the straight guide groove (931). Slide seats (932) are slidably connected inside the two straight guide grooves (931). L-shaped frames (933) are fixedly connected to the top of the two slide seats (932). End plates (935) are fixedly connected to one end of the two L-shaped frames (933). Cylinders (934) are fixedly installed between the vertical frame and the L-shaped frame (933) that are arranged in a corresponding manner. The correction assembly (93) also includes a pusher (936) fixed on the top of the two slides (932) and two dovetail grooves opened on the top of the base (10). A toggle (937) and a reset member (938) for pushing the toggle (937) to reset are slidably installed inside the two dovetail grooves.

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