Special processing equipment for plastic-lined steel pipe flange

Abstract

A special machining device for a plastic-lined steel pipe flange is composed of a pedestal, a lining pipe fixing mechanism and a flange piece fixing mechanism, a sliding rail is installed on the pedestal, the lining pipe fixing mechanism comprises a left electric tackle and a right electric tackle, an inner support is installed on each electric tackle, and each inner support is of a hydraulic supporting structure. The flange piece fixing mechanism is arranged on sliding workbenches at the left end and the right end of the sliding rail, a lifting frame and a welding gun are installed on the sliding workbenches, flange piece clamping plates are installed on the upper portion and the lower portion of the front side of the lifting frame respectively, and a push-pull hydraulic cylinder is installed on the rear side of the lifting frame. A jacking air cylinder is installed on the tackle on the rear side of the sliding workbench, and the tail end of a piston rod of the jacking air cylinder is connected with the sliding workbench. According to the utility model, the mechanical automation of repairing the lining flanging and welding of the plastic-lined pipe is realized, the repairing efficiency and quality of the plastic-lined steel pipe are improved by combining heating flanging with welding reinforcement, and meanwhile, the labor consumption is reduced, and the labor intensity of repairing the plastic-lined steel pipe is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic-lined steel pipe repair and processing equipment, specifically to a special processing equipment for plastic-lined steel pipe flanges. Background Technology

[0002] Plastic-lined pipes are made of ordinary carbon steel pipes as the base, lined with chemically superior thermoplastic plastics, and formed by cold drawing or rotational molding. They have both the mechanical properties of steel pipes and the corrosion resistance of plastic pipes, and are characterized by slow scaling and resistance to microbial growth. They are ideal pipelines for transporting media such as acids, alkalis, salts, and corrosive gases.

[0003] If a leak occurs during the use of plastic-lined steel pipes, it is necessary to repair the leak promptly. Repairing this requires inserting a plastic inner lining into the original plastic-lined steel pipe. The inner lining needs to be flanged and connected to the flange in the original plastic-lined steel pipe. Currently, this is mainly achieved by fixing the lower end of a carbon steel cone to the center of a circular grooved steel plate, which is then used to insert a PE pipe for flangering. However, this method is difficult to control during the one-time heating and forming process on the thin-walled composite pipe, making flangering difficult. Bolt tightening is used, which is time-consuming and labor-intensive. If welded flanges are used, the pressure resistance of welded flanges for U-shaped linings and municipal pipeline linings is insufficient, requiring an outer protective sleeve. This requires a large operating space and is too costly. Another method is hot-melt welding, mainly used for connecting plastic-lined steel pipes. The drawback of this method is that the connection cannot be easily disassembled after connection, and since plastic-lined steel pipes cannot withstand pressure, an outer protective sleeve is required, resulting in high construction costs. Therefore, the industry urgently needs equipment that facilitates the flange flanging and welding of plastic-lined steel pipes. Utility Model Content

[0004] This utility model provides a special processing equipment for plastic-lined steel pipe flanges to solve the problems of difficult flange repair and time-consuming and labor-intensive repair of plastic-lined steel pipes in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A special processing equipment for plastic-lined steel pipe flanges comprises a base, an inner lining pipe fixing mechanism, and a flange fixing mechanism. A slide rail is installed on the base. The inner lining pipe fixing mechanism includes two electric trolleys, each with an inner support using a hydraulic support structure. The flange fixing mechanism is located on sliding worktables at both ends of the slide rail. A lifting frame and a welding torch are installed on the sliding worktables. A flange clamping plate is installed at the top and bottom of the front side of the lifting frame. A push-pull hydraulic cylinder is installed at the rear side of the lifting frame, with its piston rod connected to a tapered flange cylinder. A clamping cylinder is installed on a trolley at the rear of the sliding worktable, with its piston rod end connected to the sliding worktable.

[0007] A positioning sensor is installed on one side of the inner support of the aforementioned electric trolley.

[0008] When using this device, a plastic inner lining tube is placed inside the original pipe to be repaired. Then, the inner support of the electric trolley is placed inside the plastic inner lining tube and secured. The flange of the plastic-lined steel pipe is fixed between the upper and lower flange plates of the lifting frame. The plastic inner lining tube at the flange port is heated, and the push-pull hydraulic cylinder pushes the conical flanging cylinder to flanging the end of the plastic inner lining tube. After the end of the plastic inner lining tube cools down, the conical flanging cylinder is removed. The connection between the flange and the plastic-lined steel pipe is welded using a welding torch.

[0009] This invention achieves mechanical automation of the inner lining flanging and welding in the repair of plastic-lined pipes. By combining heated flanging with welding reinforcement, it improves the efficiency and quality of plastic-lined steel pipe repair, while reducing the amount of manual labor and lowering the labor intensity of plastic-lined steel pipe repair. It has the advantages of reasonable design, convenient use, and safety and reliability. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] The diagram shows: 1. Base, 2. Slide rail, 3. Electric trolley, 4. Internal support, 5. Sliding worktable, 6. Lifting frame, 7. Push-pull hydraulic cylinder, 8. Conical flange cylinder, 9. Welding torch, 10. Tightening cylinder, 11. Flange clamping plate, 12. Positioning sensor. Detailed Implementation

[0013] As shown in the figure, a special processing equipment for plastic-lined steel pipe flanges consists of a base 1, an inner lining pipe fixing mechanism, and a flange fixing mechanism. A slide rail 2 is installed on the base 1. The inner lining pipe fixing mechanism includes two electric trolleys 3 (left and right), each with an inner support 4. The inner support 4 adopts a hydraulic support structure. The flange fixing mechanism is located on sliding worktables 5 at both ends of the slide rail 2. A lifting frame 6 and a welding torch 9 are installed on the sliding worktables 5. A flange clamping plate 11 is installed on the upper and lower front sides of the lifting frame 6. A push-pull hydraulic cylinder 7 is installed on the rear side of the lifting frame 6. The piston rod of the push-pull hydraulic cylinder 7 is connected to a conical flange cylinder 8. A clamping cylinder 10 is installed on the trolley behind the sliding worktable 5, and the end of the piston rod of the clamping cylinder 10 is connected to the sliding worktable 5. A positioning sensor 12 is installed on one side of the inner support on the electric trolley 3.

[0014] When using this device, a plastic inner lining tube is placed inside the original pipe to be repaired. Then, the inner support of the electric trolley is placed inside the plastic inner lining tube and secured. The flange of the plastic-lined steel pipe is fixed between the upper and lower flange plates of the lifting frame. The plastic inner lining tube at the flange port is heated, and the push-pull hydraulic cylinder pushes the conical flanging cylinder to flanging the end of the plastic inner lining tube. After the end of the plastic inner lining tube cools down, the conical flanging cylinder is removed. The connection between the flange and the plastic-lined steel pipe is welded using a welding torch.

Claims

1. A special processing equipment for plastic-lined steel pipe flange, characterized in that It consists of a base, an inner liner tube fixing mechanism, and a flange fixing mechanism. A slide rail is installed on the base. The inner liner tube fixing mechanism includes two electric trolleys on the left and right sides. Each electric trolley is equipped with an inner support, which adopts a hydraulic support structure. The flange fixing mechanism is set on the sliding worktables at the left and right ends of the slide rail. A lifting frame and a welding torch are installed on the sliding worktables. A flange clamping plate is installed on the upper and lower sides of the front side of the lifting frame. A push-pull hydraulic cylinder is installed on the rear side of the lifting frame. The piston rod of the push-pull hydraulic cylinder is connected to the conical flange cylinder. A clamping cylinder is installed on the trolley on the rear side of the sliding worktable. The end of the piston rod of the clamping cylinder is connected to the sliding worktable.

2. The plastic-lined steel pipe flange special machining apparatus according to claim 1, characterized by A positioning sensor is installed on one side of the inner support of the electric trolley.

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