A spiral steel pipe submerged arc welding flux scraping tooling

Abstract

The present application belongs to the technical field of flux scraping, and particularly relates to a flux scraping tool for submerged arc welding of spiral steel pipes, which comprises a base, a support frame, a wall-attached layered cleaning mechanism and a push-type slag removing mechanism. The support frame is arranged on the upper wall of the base. The wall-attached layered cleaning mechanism comprises a height adjusting assembly, a wall-attached assembly and a sanding assembly. The height adjusting assembly is arranged at one end of the support frame. The wall-attached assembly is arranged at the end of the height adjusting assembly away from the support frame. The sanding assembly is arranged on the wall-attached assembly. The present application can separately recycle the sand flux of the outer layer and the intermediate layer of the flux which have not been substantially changed and the slag of the bottom layer of the flux, and can dynamically monitor the bonding strength between the flux layer and the weld to ensure that the flux scraping tool for submerged arc welding of spiral steel pipes has moderate bonding strength between the flux layer and the weld.

Description

Technical Field

[0001] This invention belongs to the field of flux removal technology, specifically referring to a flux removal tool for submerged arc welding of spiral steel pipes. Background Technology

[0002] In the submerged arc welding process of spiral steel pipes, sand with a specific ratio is used as flux to protect the weld. During welding, some of the flux melts upon heating and solidifies on the weld surface, forming a coating. After the weld has completely cooled, this solidified flux layer must be thoroughly removed.

[0003] The existing flux removal fixtures for submerged arc welding of spiral steel pipes have the following problems: Existing flux removal tools for submerged arc welding of spiral steel pipes lack the ability to classify and recover the outer and middle layers of loose flux that have not undergone essential changes, along with the underlying slag, when removing the flux layer. Furthermore, traditional flux removal tools for submerged arc welding of spiral steel pipes also lack the ability to dynamically monitor the adhesion strength between the flux layer and the weld. On the one hand, this easily leads to the flux layer falling off prematurely after briefly covering the outside of the weld, affecting the protection effect on the weld. On the other hand, it makes it difficult to remove the flux layer from the weld, easily damaging the base material, and failing to meet current production and usage requirements. Summary of the Invention

[0004] In response to the above situation and to overcome the shortcomings of the existing technology, this solution provides a flux scraping tool for spiral steel pipe submerged arc welding that can separately recover the sand flux in the outer and middle layers of flux that have not undergone essential changes, as well as the welding slag at the bottom layer of flux. It can also dynamically monitor the bonding strength between the flux layer and the weld, ensuring that the bonding strength between the flux layer and the weld is appropriate.

[0005] The technical solution adopted in this solution is as follows: This solution proposes a flux scraping fixture for submerged arc welding of spiral steel pipes, including a base, a support frame, a wall-mounted layered cleaning mechanism, and a top-push slag removal mechanism. The support frame is located on the upper wall of the base. The wall-mounted layered cleaning mechanism includes a height adjustment component, a wall-mounting component, and a sanding component. The height adjustment component is located at one end of the support frame, the wall-mounting component is located at the end of the height adjustment component away from the support frame, and the sanding component is located on the wall-mounting component. The top-push slag removal mechanism includes a guiding component, a slag removal component, a slag collection component, and a adhesion measuring component. The guiding component is located at the end of the support frame away from the height adjustment component, the slag removal component is located on the guiding component, the slag collection component is located on the upper wall of the base, and the adhesion measuring component is located on the bottom wall of the guiding component.

[0006] As a further preferred embodiment of the present invention, the height adjustment assembly includes an adjusting bolt, a slag removal frame, and a locking nut. Multiple sets of the adjusting bolts are rotatably mounted on the upper wall of the support frame. The slag removal frame is fitted against the upper wall of the support frame outside the adjusting bolts and is threadedly connected to the adjusting bolts. The locking nut is located on the outside of the adjusting bolts above the slag removal frame and is threadedly connected to the adjusting bolts. The wall-mounted assembly includes a concave arc-shaped plate and a sand-leaking trough. The concave arc-shaped plate is located on the bottom wall of the slag removal frame at the end furthest from the support frame. Multiple sets of the sand-leaking troughs are located on the bottom wall of the concave arc-shaped plate and are interconnected. The sand-grinding assembly includes a sand-grinding block and a sand-grinding layer. The sand-grinding block is located on the bottom wall of the concave arc-shaped plate, and multiple sets of the sand-grinding layer are located on the upper wall of the sand-grinding block. The thickness of the sand-grinding layer gradually increases along the spiral direction of the spiral weld seam of the spiral steel pipe.

[0007] In use, the base and support frame are set along the travel path of the spiral steel pipe. The concave arc plate is located below the spiral steel pipe and is concentric with it. The operator rotates the adjusting bolt, which rotates along the upper wall of the support frame, causing the slag removal frame, which is threaded with it, to rise. The slag removal frame, through the concave arc plate, causes the abrasive blocks to rise. The abrasive blocks bring the abrasive layer closer to the surface of the spiral steel pipe. The spiral steel pipe, having completed its outer weld, enters above the concave arc plate. The sand flux covering the weld surface first contacts the thinner abrasive layer. The shape of the abrasive layer is consistent with the spiral path of the weld. The abrasive layer grinds and separates the sand flux from the outer layer of flux. First, a sand-flux recovery box is set below the concave arc plate. The sand-flux separated from the outer layer of flux falls into the recovery box. As the spiral steel pipe continues to move in a spiral state, the sand-flux in the outer and middle layers of flux comes into contact with the thinner, thicker, and thickest abrasive layers, respectively. This process grinds and separates the sand-flux in the outer and middle layers of flux in sequence. On the one hand, this achieves the recovery of sand-flux; on the other hand, it reduces the resistance of the abrasive layer on the flux layer, preventing the flux layer from falling off the weld and causing the bottom layer of flux to fall into the recovery box, thus reducing the recovery efficiency of sand-flux.

[0008] Preferably, the guide assembly includes an upwardly convex arc-shaped plate, an arc-shaped groove, a support rod seat, and an arc-shaped rod. The upwardly convex arc-shaped plate is located on the upper wall of the support frame away from the slag removal frame. The arc-shaped groove is located on the upper wall of the upwardly convex arc-shaped plate and is continuous. The support rod seats are symmetrically located on the bottom walls at both ends of the arc-shaped groove, and the arc-shaped rod is located between the support rod seats. The slag removal assembly includes a sliding block, a first pressure spring, a second pressure spring, and a slag removal block. The sliding block is slidably located on the outside of the arc-shaped rod. The first pressure spring is located on the outside of the sliding block and the support rod. Between the seats, the second pressure spring is located on the outer side of the arc-shaped rod at the end of the upper convex arc plate away from the first pressure spring, and is located between the support rod seat and the sliding block. The slag removal block is located on the bottom wall of the sliding block. The slag collection assembly includes a fixed column and a slag collection box. The fixed column is located on the upper wall of the base, and the slag collection box is located on the upper wall of the fixed column, with the slag collection box having an opening at the top. The adhesion measuring assembly includes a sensing slider and a proximity switch. The proximity switches are symmetrically located on the bottom walls at both ends of the upper convex arc plate, and the sensing slider is located on the side of the sliding block near the proximity switch.

[0009] During use, the ground flux layer enters the area below the convex arc plate as the spiral steel pipe rotates. Initially, pressure spring one is compressed and pressure spring two is extended. The sliding block is located at the end of the arc rod near the support frame. The end of the flux layer below the convex arc plate abuts against the slag removal block. The spiral movement of the spiral steel pipe pushes the slag removal block through the flux layer. Under the elastic action of pressure spring one and pressure spring two, the slag removal block slides along the arc rod into the arc groove between the two sets of proximity switches. As the deformation of pressure spring one and pressure spring two increases, the resistance of the slag removal block to the flux layer increases. At this point, when the resistance of the slag removal block to the flux layer is greater than the adhesion strength between the flux layer and the weld, the flux layer falls off from the outside of the weld and into the slag collection box, completing the scraping operation of the flux layer.

[0010] Specifically, the support frame is equipped with a controller on its side wall.

[0011] The controller is electrically connected to the proximity switch.

[0012] The beneficial effects achieved by this solution using the above structure are as follows: Compared with existing technologies, this solution combines a wall-mounted layered cleaning mechanism with a top-push slag removal mechanism. Through the inclusion of height adjustment components, wall-mounting components, abrasive components, guiding components, slag removal components, slag collection components, and adhesion measurement components, it can separate the flux layer formed on the outer side of the weld layer by layer during cooling. This allows the outer and middle layers of flux to be recovered separately from the bottom layer. The abrasive layer, arranged from thin to thick, recovers the sand-like flux that has only been subjected to high-temperature radiation and has not undergone fundamental changes, with relatively low resistance. After the outer and middle layers are recycled, the elastic deformation of pressure springs one and two causes the slag removal block to scrape off the bottom layer of flux on the outside of the weld. The scraping force of the slag removal block on the bottom layer of flux is monitored by a proximity switch, so that the sand flux formula can be adjusted in time to ensure that the flux layer and the weld are in a moderate adhesion. On the one hand, this ensures that the sand flux layer will not fall off on its own, ensuring the protection efficiency of the weld. On the other hand, it avoids that the adhesion force between the flux layer and the weld is too large, thereby reducing the cleaning difficulty and preventing damage to the base material. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this solution; Figure 2 This is the front perspective stereoscopic view of this solution; Figure 3 This is a bottom-view perspective of the design. Figure 4 This is the main view of this solution; Figure 5 This is a side view of the design. Figure 6 This is a top view of the plan; Figure 7 for Figure 6 Sectional view of AA section; Figure 8 for Figure 1 Enlarged structural view of section I; Figure 9 for Figure 2 Enlarged structural view of Part II; Figure 10 for Figure 5 Enlarged structural view of Part III.

[0014] The components are as follows: 1. Base; 2. Support frame; 3. Wall-mounted layered cleaning mechanism; 4. Height adjustment component; 5. Adjustment bolt; 6. Slag removal frame; 7. Locking nut; 8. Wall-mounted component; 9. Recessed arc plate; 10. Sand leakage trough; 11. Abrasive component; 12. Abrasive block; 13. Abrasive layer; 14. Top-push slag removal mechanism; 15. Guide component; 16. Convex arc plate; 17. Arc groove; 18. Support rod seat; 19. Arc rod; 20. Slag removal component; 21. Sliding block; 22. Pressure spring one; 23. Pressure spring two; 24. Slag collection component; 25. Fixed column; 26. Slag collection box; 27. Adhesion testing component; 28. Inductive slider; 29. ​​Proximity switch; 30. Controller; 31. Slag removal block.

[0015] The accompanying drawings are provided to further understand the present solution and form part of the specification. They are used together with the embodiments of the present solution to explain the present solution and do not constitute a limitation thereof. Detailed Implementation

[0016] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this solution, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this solution without creative effort are within the scope of protection of this solution.

[0017] In the description of this solution, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this solution.

[0018] like Figures 1-10As shown, the present solution proposes a flux scraping fixture for submerged arc welding of spiral steel pipes, including a base 1, a support frame 2, a wall-mounted layered cleaning mechanism 3, and a top-push slag removal mechanism 14. The support frame 2 is located on the upper wall of the base 1. The wall-mounted layered cleaning mechanism 3 includes a height adjustment component 4, a wall-mounted component 8, and a sanding component 11. The height adjustment component 4 is located at one end of the support frame 2, the wall-mounted component 8 is located at the end of the height adjustment component 4 away from the support frame 2, and the sanding component 11 is located on the wall-mounted component 8. The top-push slag removal mechanism 14 includes a guide component 15, a slag removal component 20, a slag collection component 24, and a adhesion measuring component 27. The guide component 15 is located at the end of the support frame 2 away from the height adjustment component 4, the slag removal component 20 is located on the guide component 15, the slag collection component 24 is located on the upper wall of the base 1, and the adhesion measuring component 27 is located on the bottom wall of the guide component 15.

[0019] The height adjustment assembly 4 includes adjusting bolts 5, a slag removal frame 6, and a locking nut 7. Multiple sets of adjusting bolts 5 are rotatably mounted on the upper wall of the support frame 2. The slag removal frame 6 is fitted against the upper wall of the support frame 2 outside the adjusting bolts 5, and the slag removal frame 6 is threadedly connected to the adjusting bolts 5. The locking nut 7 is located on the outside of the adjusting bolts 5 above the slag removal frame 6, and the locking nut 7 is threadedly connected to the adjusting bolts 5. The wall-mounting assembly 8 includes a concave arc plate 9 and a sand-leaking groove 10. The concave arc plate 9 is located on the bottom wall of the slag removal frame 6 away from the support frame 2. Multiple sets of sand-leaking grooves 10 are located on the bottom wall of the concave arc plate 9, and the sand-leaking grooves 10 are arranged through the wall. The sand-grinding assembly 11 includes a sand-grinding block 12 and a sand-grinding layer 13. The sand-grinding block 12 is located on the bottom wall of the concave arc plate 9, and multiple sets of sand-grinding layers 13 are located on the upper wall of the sand-grinding block 12. The thickness of the sand-grinding layer 13 gradually increases along the rotation path of the spiral steel pipe weld.

[0020] The guide assembly 15 includes an upwardly convex arc-shaped plate 16, an arc-shaped groove 17, a support rod seat 18, and an arc-shaped rod 19. The upwardly convex arc-shaped plate 16 is located on the upper wall of the support frame 2 away from the slag removal frame 6. The arc-shaped groove 17 is located on the upper wall of the upwardly convex arc-shaped plate 16 and is through-hole. The support rod seat 18 is symmetrically located on the bottom walls at both ends of the arc-shaped groove 17. The arc-shaped rod 19 is located between the support rod seats 18. The slag removal assembly 20 includes a sliding block 21, a first pressure spring 22, a second pressure spring 23, and a slag removal block 31. The sliding block 21 is slidably located on the outside of the arc-shaped rod 19. The first pressure spring 22 is located on the outside of the sliding block 21 and the support rod seat 19. Between 8, the second pressure spring 23 is located on the outside of the arc-shaped rod 19 at the end of the upper convex arc plate 16 away from the first pressure spring 22, and is located between the support rod seat 18 and the sliding block 21. The slag removal block 31 is located on the bottom wall of the sliding block 21. The slag collection assembly 24 includes a fixed column 25 and a slag collection box 26. The fixed column 25 is located on the upper wall of the base 1, and the slag collection box 26 is located on the upper wall of the fixed column 25. The slag collection box 26 is open at the top. The adhesion measuring assembly 27 includes a sensing slider 28 and a proximity switch 29. The proximity switch 29 is symmetrically located on the bottom walls at both ends of the upper convex arc plate 16. The sensing slider 28 is located on the side of the sliding block 21 close to the proximity switch 29.

[0021] The support frame 2 is equipped with a controller 30 on its side wall.

[0022] The controller 30 is electrically connected to the proximity switch 29.

[0023] In actual use, in the initial state, the first pressure spring 22 is in a compressed state, the second pressure spring 23 is in an extended state, the sliding block 21 is located at one end of the arc rod 19 near the support frame 2, the base 1 and the support frame 2 are set on the travel path of the spiral steel pipe, the concave arc plate 9 is set with the spiral steel pipe at the same center, and a sand flux recovery box is set below the concave arc plate 9 in advance. The operator rotates the adjusting bolt 5, the adjusting bolt 5 rotates along the upper wall of the support frame 2 to drive the slag removal frame 6 that is threaded with it to rise, the slag removal frame 6 drives the sanding block 12 to rise through the concave arc plate 9, the sanding block 12 drives the sanding layer 13 to approach the surface of the spiral steel pipe, and then rotates the locking nut 7, the locking nut 7 rotates along the adjusting bolt 5 to descend and fit against the upper wall of the slag removal frame 6 to complete the locking operation; After the spiral steel pipe with the outer weld is completed, it enters above the concave arc plate 9. The flux layer covering the weld surface first comes into contact with the thinner abrasive layer 13. The shape of the abrasive layer 13 is consistent with the spiral path of the weld. The abrasive layer 13 grinds and separates the sand flux on the outer layer of the flux. The sand flux separated from the outer layer of the flux falls into the flux recovery box. As the spiral steel pipe continues to move in a spiral state, the sand flux on the outer layer and the middle layer of the flux comes into contact with the thinner abrasive layer 13, the thicker abrasive layer 13 and the thickest abrasive layer 13 respectively. This grinds and separates the sand flux that has not formed slag in sequence. On the one hand, it realizes the recycling of sand flux. On the other hand, it can reduce the resistance of the abrasive layer 13 to the flux layer, avoid pushing the flux layer off the weld, reduce the probability of the bottom layer of flux falling into the flux recovery box, and thus improve the recycling efficiency of sand flux. The ground flux layer enters below the convex arc plate 16 as the spiral steel pipe rotates. The end of the flux layer below the convex arc plate 16 abuts against the slag removal block 31. The spiral movement of the spiral steel pipe pushes the slag removal block 31 through the flux layer. The slag removal block 31 slides along the arc rod 19 into the arc groove 17 between the proximity switches 29 by the elastic deformation of the pressure spring 22 and the pressure spring 23. The proximity switch 29 senses the sliding block 28 passing over it. As the deformation of the pressure spring 22 and the pressure spring 23 increases, the resistance of the slag removal block 31 to the flux layer increases. At this time, the resistance of the slag removal block 31 to the flux layer is greater than the adhesion strength between the flux layer and the weld. The flux layer falls off from the outside of the weld and falls into the slag collection box 26, completing the scraping operation of the flux layer. When the flux layer adhesion is weak and the slag removal block 31 fails to push the sliding block 21 and the sensing slider 28 past the proximity switch 29 and into the arc groove 17 between the proximity switches 29, the controller 30 cannot receive the signal from the proximity switch 29. Alternatively, when the flux layer adhesion is strong and the slag removal block 31 is pushed in succession, the sliding block 21 and the sensing slider 28 pass past two sets of proximity switches 29 and slide out of the arc groove 17 between the proximity switches 29, the controller 30 receives the signal from the second set of proximity switches 29. This alerts the operator to adjust the flux formula in time to ensure that the adhesion strength between the flux layer and the weld is moderate. On the one hand, this reduces the probability of the flux layer automatically falling off and improves the protection efficiency of the flux layer for the weld. On the other hand, it reduces the adhesion strength between the flux layer and the weld, ensuring that the flux layer can be easily scraped off without damaging the base material. The above operation can be repeated for the next use.

[0024] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] The present solution and its implementation methods have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present solution; the actual structure is not limited to this. In conclusion, if a person skilled in the art, inspired by this description, designs a similar structure and embodiment without departing from the inventive intent of this solution, such design should fall within the protection scope of this solution.

Claims

1. A flux scraping fixture for submerged arc welding of spiral steel pipes, comprising a base and a support frame, characterized in that: It also includes a wall-mounted layered cleaning mechanism and a top-push welding slag removal mechanism. The support frame is set on the upper wall of the base. The wall-mounted layered cleaning mechanism includes a height adjustment component, a wall-mounting component, and a sanding component. The height adjustment component is set at one end of the support frame, the wall-mounting component is set at the end of the height adjustment component away from the support frame, and the sanding component is set on the wall-mounting component. The top-push welding slag removal mechanism includes a guide component, a slag removal component, a slag collection component, and a sticking test component. The guide component is set at the end of the support frame away from the height adjustment component, the slag removal component is set on the guide component, the slag collection component is set on the upper wall of the base, and the sticking test component is set on the bottom wall of the guide component. The guiding component includes an arc-shaped groove; the slag removal component includes a sliding block and a slag removal block; the adhesion measurement component includes a sensing slider and a proximity switch. The support frame is equipped with a controller on its side wall; When the flux layer fails to push the slag removal block, causing the sliding block and sensing slider to slide past the proximity switch and enter the arc groove between the proximity switches, the controller cannot receive the feedback signal from the proximity switch. Alternatively, when the flux layer successively pushes the slag removal block, causing the sliding block and sensing slider to slide past two sets of proximity switches and slide out of the arc groove between the proximity switches, the controller receives the feedback signal from the second set of proximity switches, thereby reminding the operator to adjust the flux formula in time to ensure that the bonding strength between the flux layer and the weld is appropriate.

2. The flux scraping tool for submerged arc welding of spiral steel pipes according to claim 1, characterized in that: The height adjustment assembly includes an adjusting bolt, a slag removal frame, and a locking nut. Multiple sets of the adjusting bolts are rotatably mounted on the upper wall of the support frame. The slag removal frame is fitted against the upper wall of the support frame outside the adjusting bolts, and the slag removal frame is threadedly connected to the adjusting bolts. The locking nut is located on the outside of the adjusting bolts above the slag removal frame, and the locking nut is threadedly connected to the adjusting bolts.

3. The flux scraping fixture for submerged arc welding of spiral steel pipes according to claim 2, characterized in that: The wall-mounted assembly includes a concave arc-shaped plate and a sand-leaking trough. The concave arc-shaped plate is located on the bottom wall of the slag removal frame away from the support frame. Multiple sets of the sand-leaking troughs are located on the bottom wall of the concave arc-shaped plate and are arranged in a continuous manner.

4. The flux scraping fixture for submerged arc welding of spiral steel pipes according to claim 3, characterized in that: The frosting component includes a frosting block and a frosting layer. The frosting block is disposed on the bottom wall of the concave arc plate, and multiple sets of the frosting layer are disposed on the upper wall of the frosting block. The thickness of the frosting layer gradually increases along the spiral direction of the spiral steel pipe weld.

5. The flux scraping tool for submerged arc welding of spiral steel pipes according to claim 2, characterized in that: The guide assembly also includes an upwardly convex arc plate, a support rod seat, and an arc rod. The upwardly convex arc plate is located on the upper wall of the support frame away from the slag removal frame. The arc groove is located on the upper wall of the upwardly convex arc plate and is a through-type arc groove. The support rod seat is symmetrically located on the bottom walls at both ends of the arc groove, and the arc rod is located between the support rod seats.

6. The flux scraping tool for submerged arc welding of spiral steel pipes according to claim 5, characterized in that: The slag removal assembly also includes a first pressure spring and a second pressure spring. The sliding block is slidably disposed on the outside of the arc-shaped rod. The first pressure spring is disposed between the sliding block and the support rod seat on the outside of the arc-shaped rod. The second pressure spring is disposed on the outside of the arc-shaped rod away from the end of the upper convex arc plate, and is disposed between the support rod seat and the sliding block. The slag removal block is disposed on the bottom wall of the sliding block.

7. The flux scraping fixture for submerged arc welding of spiral steel pipes according to claim 1, characterized in that: The slag collection assembly includes a fixed column and a slag collection box. The fixed column is located on the upper wall of the base, and the slag collection box is located on the upper wall of the fixed column, with the slag collection box having an opening at the top.

8. The flux scraping tool for submerged arc welding of spiral steel pipes according to claim 5, characterized in that: The proximity switches are symmetrically arranged on the bottom walls at both ends of the convex arc plate, and the sensing slider is located on the side of the sliding block close to the proximity switches.

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