A 1000mpa grade pressure steel pipe welding environment improvement device

Abstract

This utility model discloses a device for improving the welding environment of 1000MPa pressure steel pipes, relating to the field of water conservancy and hydropower technology, including: a three-proof cloth. This utility model involves holding two levers to bring two sliding plates closer together, causing two sliding heads to slide in the installation groove, pushing two triangular blocks. This moves two connecting steel bars away from the limiting steel bar and causes their own suspension hooks to expand the distance, pressing the limiting steel bar against the fixed flat steel where the three-proof cloth is located. Under the alignment of the outward expansion and inward contraction tilting platforms, the ends of the limiting steel bar and the fixed flat steel are aligned. With one end of the suspension hook aligned with the side edge of the fixed flat steel, the suspension hook is aligned on both sides of the fixed flat steel. Releasing the levers causes the spring force to pull the sliding plates back to their original position until the suspension hook is fastened to the fixed flat steel. Finally, screwing the positioning screw into the corresponding positioning hole completes the uniform clamping and installation of the three-proof cloth. The installation method is quick and has good long-term stability, preventing the three-proof cloth from loosening and avoiding water leakage.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and hydropower technology, specifically to a device for improving the welding environment of 1000MPa pressure steel pipes. Background Technology

[0002] In domestic pumped storage power station projects, starting with the Ming Tombs Pumped Storage Power Station, which began using 800MPa-grade high-strength steel imported from Japan, the use of 800MPa-grade high-strength steel has expanded significantly with the development of domestic science and technology. The manufacturing processes for 800MPa-grade high-strength steel, including coiling, welding, and hot-working properties, are now quite mature. For example, the water intake pressure pipes of the Ninghai and Jinyun Pumped Storage Power Stations, currently under construction, both use 800MPa-grade high-strength steel, and considerable experience has been accumulated in the welding testing and manufacturing technology of this steel.

[0003] The Tiantai pumped storage power station consists of two inclined shafts. The section from the lower inclined shaft's bend to the water diversion branch pipe is entirely constructed using 1000MPa high-strength steel pipes with a plate thickness of 50mm-60mm. The installation conditions for the steel pipes are complex: the geological conditions at the location are poor, with severe water seepage and high humidity; the tunnel's construction creates significant drafts in the flow channel. The biggest challenge in welding the 1000MPa pressure steel pipes inside the tunnel is the humid environment. Humidity significantly affects the diffusible hydrogen content of the weld metal during welding. Excessive humidity at the installation site will cause the welding rods to absorb moisture, increasing the diffusible hydrogen in the weld metal and raising the risk of cold cracking. To mitigate this, the welding environment is typically improved to meet welding requirements and enhance weld quality.

[0004] The traditional improvement method is to install a partition space in the welding area. The existing technology involves arranging steel frames and three-proof cloth in the area where 1000MPa high-strength steel pipes need to be welded in the tunnel. The environment within the partition welding space meets the welding process requirements and ensures the installation and welding quality. However, the three-proof cloth and the steel frame are fixed with nail guns. The fixing strength of this method is relatively low because the pull-out and shear resistance of a single nail is limited. Under long-term load, vibration, water pressure and other coupling, it is easy to loosen. In addition, the nail holes may become a source of leakage. Without additional sealing measures, water vapor and water pressure can easily seep in. Utility Model Content

[0005] The purpose of this invention is to provide a welding environment improvement device based on 1000MPa pressure steel pipes. This solves the problem that in traditional welding environment improvement devices based on 1000MPa pressure steel pipes, the three-proof cloth and the steel frame are fixed with a nail gun. Because the pull-out and shear resistance of a single nail is limited, it is easy to loosen under long-term load, vibration, water pressure and other coupling, and the nail hole may become a source of leakage. Without additional sealing measures, water vapor and water pressure can easily seep in.

[0006] This utility model solves the above-mentioned technical problems through the following technical solution: A device for improving the welding environment of 1000MPa pressure steel pipes, characterized in that it includes: Three-proof fabric; A suspension assembly is used to lay the three-proof cloth inside the tunnel. The suspension assembly includes a fixing component and a limiting component. The three-proof cloth is disposed between the fixing component and the limiting component. The fixing component is disposed on the inner wall of the tunnel. The fixing component includes at least two anchor rods disposed on the inner wall of the tunnel. A fixing flat steel is fixed between one end of the two anchor rods. Both ends of the fixing flat steel are fixed with inward tilting platforms.

[0007] Preferably, the limiting component includes a limiting steel bar, both ends of which are fixed with an outwardly expanding inclined platform. An inner groove is formed on the inner side of the limiting steel bar. Connecting steel bars are provided on both sides of the limiting steel bar. A support bar is fixed on one side of each of the two connecting steel bars. One end of each of the two support bars extends to the inner side of the inner groove. A suspension hook is fixed on each of the two connecting steel bars. An opening and closing component is provided on the inner side of the inner groove.

[0008] Preferably, the opening and closing component includes two triangular blocks that slide in the inner groove and two sliding plates that slide in the inner groove. Both triangular blocks extend to the outside of the limiting steel strip and are fixedly connected to the two connecting steel strips respectively. Each of the two triangular blocks has an installation groove on its inclined surface. Each of the two installation grooves has a sliding head that slides on its inner side. One end of each sliding head is fixed to the two sliding plates respectively.

[0009] Preferably, the opening and closing component further includes two fixing plates fixed to the inner side of the inner groove, two double positive magnetic plates fixed to the inner side of the inner groove, and double negative magnetic plates respectively fixed to the two sliding plates. Springs are fixed to both fixing plates, and one end of each spring is fixed to the two sliding plates respectively.

[0010] Preferably, the limiting steel bar has two first grooves and two second grooves, both of which are connected to the inner groove, and the limiting steel bar has two positioning holes.

[0011] Preferably, the opening and closing component further includes two connecting plates, one of which slides between two first grooves and the other sliding between two second grooves. The two connecting plates are respectively fixedly connected to two sliding plates. A positioning screw is threadedly connected to each of the two connecting plates, and a handle is fixed to each of the two connecting plates.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By gripping the two levers, the two sliding plates are brought closer together, causing the two sliding heads to slide in the mounting groove and push the two triangular blocks. This moves the two connecting steel bars away from the limiting steel bars and causes their own suspension hooks to widen the gap. The limiting steel bars are then pressed against the fixed flat steel where the three-proof cloth is located. With the alignment of the outward expansion tilting platform and the inward contraction tilting platform, the ends of the limiting steel bars and the fixed flat steel are aligned. With one end of the suspension hook aligned with the side edge of the fixed flat steel, the suspension hook is aligned on both sides of the fixed flat steel. The levers are released, and the spring force pulls the sliding plates back to their original position until the suspension hook is fastened to the fixed flat steel. The positioning screw is then screwed into the corresponding positioning hole to complete the uniform clamping and installation of the three-proof cloth. The installation method is quick and has good long-term stability. The three-proof cloth is not easy to loosen, avoiding water leakage. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram showing the disassembled suspension assembly in this utility model; Figure 3 This is a bottom-view exploded view of the limiting component in this utility model; Figure 4 for Figure 3 Enlarged schematic diagram of part A in the middle.

[0014] The numbers in the diagram represent: 1. Three-proof cloth; 2. Suspension assembly; 21. Anchor rod; 22. Fixing flat steel; 23. Inward tilting platform; 24. Limiting steel bar; 25. Inner groove; 26. Connecting steel bar; 27. Support bar; 28. Outward tilting platform; 29. ​​Triangular block; 210. Sliding plate; 211. Mounting groove; 212. Sliding head; 213. Fixing plate; 214. Double positive magnetic plate; 215. Double negative magnetic plate; 216. Spring; 217. First groove; 218. Second groove; 219. Positioning hole; 220. Connecting plate; 221. Positioning screw; 222. Handle; 223. Suspension hook. Detailed Implementation

[0015] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0016] This embodiment provides a technical solution: a device for improving the welding environment of 1000MPa pressure steel pipes, such as... Figures 1-4As shown, it includes a three-proof cloth 1 and a suspension assembly 2. The suspension assembly 2 is used to lay the three-proof cloth 1 inside the tunnel and to isolate the welding area of ​​the 1000MPa high-strength steel pipe. The three-proof cloth 1 is mainly used for fire prevention, flame retardancy and rain protection. The 1000MPa high-strength steel pipe inside the three-proof cloth 1 will be welded in a local small environment formed by the three-proof cloth 1 to ensure the welding quality. The three-proof cloth is laid out in one go and is placed around the entire tunnel cross section.

[0017] The suspension components 2 are arranged in a ring around the inner wall of the tunnel section. The distance between two adjacent suspension components 2 is 1 meter. A ring of suspension components 2 can be regarded as a row of components. According to the extension direction of the tunnel, multiple rows of suspension components 2 are set in the areas where isolation is required. The suspension components 2 include fixing parts and limiting parts. The three-proof cloth 1 is set between the fixing parts and the limiting parts. The fixing parts are set on the inner wall of the tunnel. The fixing parts include at least two anchor rods 21 set on the inner wall of the tunnel. A fixing flat steel 22 is fixed between one end of the two anchor rods 21. The specific number of anchor rods 21 on a fixing flat steel 22 can be set by the user. Both ends of the fixing flat steel 22 are fixed with inward tilting platforms 23.

[0018] The limiting component includes a limiting steel bar 24, with outwardly expanding inclined platforms 28 fixed at both ends of the limiting steel bar 24. When the inclined surfaces of the outwardly expanding inclined platforms 28 and the inwardly contracting inclined platforms 23 are in contact, the upper and lower surfaces of the fixed flat steel 22 and the limiting steel bar 24 are in contact and sealed. Furthermore, the opposing inclined surfaces of the two components help align the ends of the limiting steel bar 24 and the fixed flat steel 22 when the limiting steel bar 24 is pressed against the fixed flat steel 22. After the limiting steel bar 24 is hung on the fixed flat steel 22, it also prevents misalignment between the limiting steel bar 24 and the fixed flat steel 22, thus preventing any impact on the hanging quality of the three-proof cloth 1. An inner groove 25 is provided on the inner side of the limiting steel bar 24, and the two sides of the limiting steel bar 24... Each is equipped with a connecting steel bar 26, and a support bar 27 is fixed to one side of each connecting steel bar 26. One end of each support bar 27 extends to the inner side of the inner groove 25. When the connecting steel bar 26 moves away from the limiting steel bar 24, the support bar 27 can stabilize the connecting steel bar 26. At least two suspension hooks 223 are fixed on each of the two connecting steel bars 26. The upper end of the suspension hook 223 is an inclined arc surface. When the suspension hook 223 moves toward the fixed flat steel 22, it can quickly align the suspension hooks 223 on the two connecting steel bars 26 to both sides of the fixed flat steel 22 by sliding with the inclined arc surface in contact with the edge of the fixed flat steel 22. An opening and closing part is provided on the inner side of the inner groove 25.

[0019] The opening and closing component includes two triangular blocks 29 that slide in the inner groove 25 and two sliding plates 210 that slide in the inner groove 25. The inclined surfaces of the two triangular blocks 29 are arranged opposite each other. The two triangular blocks 29 are both located between the two sliding plates 210. The two triangular blocks 29 extend to the outside of the limiting steel bar 24 and are fixedly connected to the middle part of the two connecting steel bars 26 respectively. The inclined surfaces of the two triangular blocks 29 are provided with mounting grooves 211. Sliding heads 212 slide on the inner side of the two mounting grooves 211 respectively. One end of the two sliding heads 212 is fixed to the two sliding plates 210 respectively.

[0020] The opening and closing mechanism also includes two fixing plates 213 fixed to the inner side of the inner groove 25, two double positive magnetic plates 214 fixed to the inner side of the inner groove 25, and double negative magnetic plates 215 respectively fixed to the two sliding plates 210. The two fixing plates 213 and the two double positive magnetic plates 214 are respectively set on one side of the two sliding plates 210, that is, the two sliding plates 210 are located between the two fixing plates 213 and the two double positive magnetic plates 214. Springs 216 are fixed on both fixing plates 213. One end of the two springs 216 is fixed to the two sliding plates 210 respectively. When the springs 216 are at their original length, the double negative magnetic plates 215 and the double positive magnetic plates 214 on the sliding plates 210 attract each other. Later, when the springs 216 slightly fail or the elasticity is fatigued, the attraction between the double positive magnetic plates 214 and the double negative magnetic plates 215 drives the sliding plates 210 to return to their original position completely, preventing the suspension hook 223 from detaching from the fixed flat steel 22.

[0021] The limiting steel bar 24 has two first grooves 217 and two second grooves 218, both of which are connected to the inner groove 25. The limiting steel bar 24 has two positioning holes 219. The opening and closing component also includes two connecting plates 220. One connecting plate 220 slides between the two first grooves 217 and is fixedly connected to one of the sliding plates 210. The other connecting plate 220 slides between the two second grooves 218 and is fixedly connected to the other sliding plate 210. Both connecting plates 220 are threaded with positioning screws 221 whose diameter matches the inner diameter of the positioning holes 219. Both connecting plates 220 are fixed with handles 222.

[0022] In use: Anchor bolts 21 are fixed to the required installation position of the suspension assembly 2 in the tunnel using existing methods (such as pre-embedding or bolt fixing). The fixing flat steel 22 on the anchor bolts 21 is distributed around the inner wall of the tunnel section. Then, the three-proof cloth 1 is installed and suspended starting from the bottommost suspension assembly 2 on one side of the tunnel. After pressing the three-proof cloth 1 onto the fixing flat steel 22, the positioning screw 221 on the limiting steel bar 24 is unscrewed from the positioning hole 219. One hand holds the two handles 222 on the limiting steel bar 24, and the handles 222 drive the connecting plate 220 connected to it in the first groove 217 or the second groove 217. The sliding mechanism 18 drives the two sliding plates 210 in the inner groove 25 to move closer to each other and pulls the spring 216. This causes the two sliding heads 212 to slide in the mounting slots 211 on the two triangular blocks 29. As the sliding heads 212 push, the two triangular blocks 29 will move out of the limiting steel bar 24, thereby pushing the two connecting steel bars 26 away from the limiting steel bar 24 and pulling the support bar 27 out of the inner groove 25. Under the support and restriction of the support bar 27, the stability of the connecting steel bars 26 is maintained. The two connecting steel bars 26 will drive the suspension hooks 223 on themselves to widen the gap. Then, press the limiting steel bar 24 onto the fixed flat steel 22 where the three-proof cloth 1 is located. With the sliding alignment of the inclined surfaces of the outward-expanding inclined platform 28 and the inward-retracting inclined platform 23, the two ends of the limiting steel bar 24 and the fixed flat steel 22 are aligned. At the same time, the end of the suspension hook 223 with the inclined arc surface will abut against the side edge of the fixed flat steel 22. When the limiting steel bar 24 is pressed against the fixed flat steel 22, the suspension hooks 223 on the two connecting steel bars 26 will quickly align with both sides of the fixed flat steel 22 along this inclined arc surface until the limiting steel bar 24 presses the three-proof cloth 1 and is tightly attached to the fixed flat steel 22. Then the handle 222 can be released, and the spring 216 will release the spring. Under the force reset, the sliding plate 210 will be pulled back to its original position. When the spring 216 fatigues later, the attraction of the double positive magnetic plate 214 and the double negative magnetic plate 215 will cause the sliding plate 210 to be completely reset. The reset of the sliding plate 210 will pull the sliding head 212 back to its original position, thereby causing the triangular block 29 to drive the connecting steel strip 26 to reset. The suspension hook 223 will be fastened to the fixed flat steel 22. Then, the positioning screw 221 will be screwed into the corresponding positioning hole 219 to prevent the sliding plate 210 from being displaced by vibration. This completes the installation and suspension of the three-proof cloth 1. The installation method allows the three-proof cloth 1 to have uniform clamping pressure. Because the clamping force is relatively stable, the long-term stability is good.

[0023] The above description is merely a preferred embodiment of the present utility model and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present utility model, all of which will fall within the protection scope of the present utility model.

Claims

1. A device for improving the welding environment of 1000MPa pressure steel pipes, characterized in that, include: Three-proof fabric (1); The suspension assembly (2) is used to lay the three-proof cloth (1) in the tunnel. The suspension assembly (2) includes a fixing component and a limiting component. The three-proof cloth (1) is disposed between the fixing component and the limiting component. The fixing component is disposed on the inner wall of the tunnel. The fixing component includes at least two anchor rods (21) disposed on the inner wall of the tunnel. A fixing flat steel (22) is fixed between one end of the two anchor rods (21). Both ends of the fixing flat steel (22) are fixed with inward tilting platforms (23).

2. The device for improving the welding environment of 1000MPa pressure steel pipes as described in claim 1, characterized in that, The limiting component includes a limiting steel bar (24), both ends of which are fixed with an outwardly expanding inclined platform (28). An inner groove (25) is provided on the inner side of the limiting steel bar (24). Connecting steel bars (26) are provided on both sides of the limiting steel bar (24). A support bar (27) is fixed on one side of each of the two connecting steel bars (26). One end of each of the two support bars (27) extends to the inner side of the inner groove (25). A suspension hook (223) is fixed on each of the two connecting steel bars (26). An opening and closing component is provided on the inner side of the inner groove (25).

3. The device for improving the welding environment of 1000MPa pressure steel pipes as described in claim 2, characterized in that, The opening and closing component includes two triangular blocks (29) that slide in the inner groove (25) and two sliding plates (210) that slide in the inner groove (25). The two triangular blocks (29) extend to the outside of the limiting steel bar (24) and are fixedly connected to the two connecting steel bars (26) respectively. The inclined surfaces of the two triangular blocks (29) are provided with mounting grooves (211). The inner sides of the two mounting grooves (211) are provided with sliding heads (212). One end of the two sliding heads (212) is fixed to the two sliding plates (210) respectively.

4. The device for improving the welding environment of 1000MPa pressure steel pipes as described in claim 3, characterized in that, The opening and closing component also includes two fixing plates (213) fixed to the inner side of the inner groove (25), two double positive magnetic plates (214) fixed to the inner side of the inner groove (25), and double negative magnetic plates (215) respectively fixed to the two sliding plates (210). Springs (216) are fixed on both fixing plates (213), and one end of each spring (216) is fixed to the two sliding plates (210).

5. The device for improving the welding environment of 1000MPa pressure steel pipes as described in claim 4, characterized in that, The limiting steel bar (24) has two first grooves (217) and two second grooves (218), and the two first grooves (217) and the two second grooves (218) are connected to the inner groove (25). The limiting steel bar (24) is provided with two positioning holes (219).

6. The device for improving the welding environment of 1000MPa pressure steel pipes as described in claim 5, characterized in that, The opening and closing component also includes two connecting plates (220), one of which slides between two first grooves (217) and the other sliding between two second grooves (218). The two connecting plates (220) are respectively fixedly connected to two sliding plates (210). Both connecting plates (220) are threaded with positioning screws (221) and handles (222) are fixedly attached to both connecting plates (220).

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