A skid-mounted stainless steel lined pipe on-site pipe making unit

Abstract

The present invention discloses a skid-mounted stainless steel liner pipe on-site pipe making unit, which includes an unwinder, a sizing and trimming device, an edge scrubbing and dust removal device, an arc pressing roller, a preliminary shaping and rounding roller, a welding device, a grinder, and a precise rounding machine in sequence along the feeding direction. The unwinder, the sizing and trimming device, the edge scrubbing and dust removal device, the arc pressing roller, the preliminary shaping and rounding roller, the double-sided welding device, the grinder, and the precise rounding machine are sequentially placed in a container that can be used for hoisting and transportation. The present invention has a simple structure, excellent performance, convenient use, a wide range of pipe diameters, and flexible pipe diameter adjustment. According to the diameter of the old pipe, no factory is required, and the occupied land is saved. The inner liner pipe that matches the required pipe diameter can be manufactured on-site flexibly and accurately. At the same time, the on-site avoidance of repeated pressing rollers and one-step pressing processes are simplified. Combined with a reducing machine and a traction machine, the "one-step" short process construction of pipe making, welding, flaw detection, reducing, traction into the pipe, and pressing and shaping can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of trenchless pipeline lining repair, and in particular to a skid-mounted stainless steel lining pipe on-site pipe making unit. Background Art

[0002] With the rapid development of urban construction, the improvement of people's lives, and the increase in demand for water, gas, and oil, higher requirements have been placed on the transportation capacity of urban pipelines. The increase in the number of newly built pipelines has led to a smaller and smaller underground space, and fewer and fewer routes for laying pipelines. As time goes by, the scaling, leakage, and corrosion of the original pipelines continue to worsen, and their transformation has become inevitable in the process of urban development. Technically speaking, these pipelines can be completely solved by lining repair technology. The overall advantage of the non-excavation repair method is that the construction has little negative impact, the repair occupies less space, and the impact on the ground, transportation, environment, and surrounding underground pipelines is very small.

[0003] With the continuous development of trenchless pipeline lining repair technology, the use of various materials to repair pipelines has been widely used, such as stainless steel lined pipes, PE solid wall lined pipes, heat (light) cured CIPP lined pipes, pressure-bearing composite hoses, etc. However, in terms of high quality, fast construction speed, corrosion resistance, high temperature resistance, high pressure resistance, long-distance construction and small diameter loss after lining, the performance of other lining repair pipes is far behind that of stainless steel lined pipes, and various performance indicators are far lower than those of stainless steel lined pipes.

[0004] The manufacturing of stainless steel lined pipes is currently all factory-produced. After the pipes are transported to the construction site and undergo processes such as welding, flaw detection, pressure testing, and necking, a traction machine is used to insert the stainless steel lined pipe into the old pipe that needs lining repair. Then it is expanded with water or physical methods, so that the outer wall of the lining pipe expands and solidifies onto the inner wall of the old pipe to be repaired, finally forming a new composite structure pipeline with higher corrosion resistance, fluidity, practicality, and operating economy than the original pipeline.

[0005] At present, since stainless steel lined pipes at home and abroad are all produced in factories with fixed diameters and lengths, the length of factory pipe making units is generally more than 30 meters, and the length of each pipe produced is basically within 12 meters. The diameter of the produced pipes is quite different from the diameter of the old pipes that need to be lined and repaired on site, which cannot meet the needs of accurate and flexible pipe making, and it is even more impossible to produce high-quality integral stainless steel lined pipes with only one weld and a length of more than 12 to 1000 meters. The wall thickness of the common stainless steel lined pipes is generally between 0.5mm and 3mm, and the wall thickness is very thin. It is very easy to deform and damage during transportation, so the transportation cost is very high. During on-site construction, it is almost all "the pipe is rolled on site by a pipe reel, pulled into the pipe section by section, and then welded and drilled into the pipe for manual welding." The welding quality requirements for repairing stainless steel linings in pipelines are relatively high. Therefore, transportation deformation and damage as well as manual welding make it impossible to guarantee the construction quality, and the production efficiency is very low, which greatly increases the construction difficulty of on-site welding, flaw detection, pressure testing and other processes, resulting in very high fixed charges for manpower, machines, materials, etc., which directly affects the popularization and development of stainless steel lining pipeline repair technology. Summary of the invention

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is: a skid-mounted stainless steel liner pipe on-site pipe making unit, which includes an uncoiler, a sizing and trimming device, an edge scrubbing and dust removal device, an arc pressing roller, a preliminary shaping and rounding roller, a double-sided welding device, a grinder, and a precise rounding machine in sequence along the feeding direction. The uncoiler is used to unfold the raw material coil, the sizing and trimming device is used to perform standard cutting on the raw materials that do not meet the size requirements, the edge scrubbing and dust removal device is used to grind and erase the dust on the edge welding of the raw material coil, and the arc pressing roller is used to press the arc on the feeding edge of the raw material coil to form a preliminary flattened coil. Arc shape, the preliminary shaping and rounding roller is used to shape and round the raw material coil into a preliminary circle, the double-sided welding device is used to perform double-sided welding on the opening of the tube body, so that the raw material coil is transformed from a plate body into a closed round tube body, the grinder is used to level and grind the outer weld, and the precise rounding machine is used to perform a third precise rounding on the round tube after welding and grinding and to perform linear drive on the tube, the uncoiler, sizing and trimming device, edge scrubbing and dust removal device, arc pressing roller, preliminary shaping and rounding roller, double-sided welding device, grinder, and precise rounding machine are sequentially placed in a container that can be used for lifting and transportation.

[0007] As an improvement, the uncoiler is provided with a foldable automatic centering device, and the sizing and trimming device is provided with an adjustable and detachable roller.

[0008] As an improvement, the sizing and trimming device includes a bracket, a screw, a moving block, a connecting piece, a hob, a ruler, a motor 1 and a motor 2. The bracket is arranged in a door shape on both sides of the raw material coil, and one side of the bracket is provided with a motor 2 fixedly connected to it, and a screw connecting the brackets on both sides is arranged in the middle, a moving block matching the screw is arranged on the screw, and a threaded hole matching the screw is arranged in the middle of the moving block, a motor 1 fixedly connected to it is arranged above the moving block, a connecting piece fixedly connected to it is arranged below the moving block, a hob is arranged on the end of the connecting piece away from the moving block, and the hob is transmission-connected to the motor 1 through a connecting piece, and the ruler is arranged parallel to the screw and fixedly connected to the bracket.

[0009] As an improvement, the width of the arc pressing roller can be adjusted according to the width of the raw material coil. There are multiple arc pressing rollers, and the first arc pressing roller along the feeding direction is provided with an edge scrubbing and dust removal device.

[0010] As an improvement, the preliminary shaping and rounding rollers are multiple and symmetrically arranged on both sides of the raw material coil.

[0011] As an improvement, the precise rounding machine has 2 wheels, 4 wheels, 6 wheels, or 8 wheels arranged symmetrically, and is driven by a chain transmission or a shaft driving a rubber pressure wheel.

[0012] As an improvement, a continuous flaw detection device for continuous flaw detection of welds and a round tube linear motion roller are provided behind the precise rounding machine along the feeding direction. The continuous flaw detection device is used to detect the welding quality at the joint of the round tube, and the round tube linear motion roller is arranged in pairs on both sides of the round tube, and is used to rotate and guide the round tube to move along its axial direction.

[0013] After adopting the above structure, the present invention has the following advantages: the present invention has a simple structure, excellent performance, convenient use, wide coverage of pipe diameters, flexible adjustment of pipe diameters, high pipe forming accuracy, fast pipe making speed, and low cost. The present invention can flexibly and accurately manufacture stainless steel pipe liner pipes that match the required pipe diameter on site without the need for a factory building according to the diameter of the old pipe, saving land occupied at the construction site, and simplifying the on-site multiple repeated roller pressing and one (test) pressing process. Combined with a reducing machine and a traction machine, it can realize the "one-step" short process construction of pipe making, welding, flaw detection, reducing, traction into the pipe, and pressing and shaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic structural diagram of a skid-mounted stainless steel lined pipe on-site pipe making unit.

[0015] Figure 2 The invention discloses a schematic structural diagram of a sizing and trimming device of a skid-mounted stainless steel lined pipe on-site pipe making unit.

[0016] Figure 3 The invention discloses a schematic diagram of a two-wheel structure of a precise rounding machine for a skid-mounted stainless steel lined pipe on-site pipe making unit.

[0017] Figure 4 It is a four-wheel cross-sectional view of a skid-mounted stainless steel lined pipe on-site pipe making unit precision rounding machine of the present invention.

[0018] As shown in the figure: 1. Uncoiler, 2. Sizing and trimming device, 2.1. Bracket, 2.2. Screw, 2.3. Moving block, 2.31. Motor 1, 2.32. Threaded hole, 2.4. Connector, 2.5. Hob, 2.6. Ruler, 2.7. Motor 2, 3. Edge cleaning and dust removal device, 4. Arc pressing roller, 5. Preliminary shaping and rounding roller, 6. Double-sided welding device, 7. Grinding machine, 8. Precision rounding machine, 9. Continuous flaw detection device, 10. Round tube linear motion roller. DETAILED DESCRIPTION

[0019] Combined with Figures 1 to 4 A skid-mounted stainless steel liner pipe on-site pipe making unit comprises, in sequence along the feeding direction, an uncoiler 1, a sizing and trimming device 2, an edge scrubbing and dust removal device 3, an arc pressing roller 4, a preliminary shaping and rounding roller 5, a double-sided welding device 6, a grinder 7, and a precise rounding machine 8. The uncoiler 1 is used to unwind the raw material coil, the sizing and trimming device 2 is used to perform standard cutting on the raw materials that do not meet the size requirements, the edge scrubbing and dust removal device 3 is used to grind and erase the dust on the edge welding of the raw material coil, the arc pressing roller 4 is used to press the arc on the feeding edge of the raw material coil to form a preliminary flat arc shape, and the preliminary shaping and rounding roller 5 is used to press the arc on the feeding edge of the raw material coil to form a preliminary flat arc shape. The round pressing roller 5 is used to shape and round the raw material coil into a preliminary round shape, the double-sided welding device 6 is used to perform double-sided welding on the opening of the tube body, so that the stainless steel coil is transformed from a plate body into a closed round tube body, the grinder 7 is used to level and grind the outer weld, and the precise rounding machine 8 is used to perform a third precise rounding on the round tube after welding and grinding and to linearly drive the tube, the uncoiler 1, the sizing and trimming device 2, the edge scrubbing and dust removal device 3, the arc pressing roller 4, the preliminary shaping and rounding pressing roller 5, the double-sided welding device 6, the grinder 7, and the precise rounding machine 8 are sequentially arranged in a container that can be used for lifting and transportation.

[0020] As a preferred implementation of this embodiment, the uncoiler 1 is provided with a foldable automatic centering device, and the sizing and trimming device 2 is provided with an adjustable and detachable hob 2.5.

[0021] As a preferred implementation scheme of this embodiment, the sizing and trimming device 2 includes a bracket 2.1, a screw 2.2, a moving block 2.3, a connecting piece 2.4, a hob 2.5, a ruler 2.6, a motor 1 2.31, and a motor 2 3.7. The bracket 2.1 is arranged in a door shape on both sides of the raw material coil, and one side of the bracket is provided with a motor 2 2.7 fixedly connected thereto, and a screw 2.2 connecting the brackets 2.1 on both sides is arranged in the middle, and a moving block 2.3 cooperating with the screw 2.2 is arranged on the screw 2.2. A threaded hole 2.32 cooperating with the screw is provided in the middle of the moving block 2.3, a motor 2.31 fixedly connected to the moving block 2.3 is provided above the moving block 2.3, a connecting piece 2.4 fixedly connected to the moving block 2.3 is provided below the moving block 2.3, a hob 2.5 is provided at one end of the connecting piece 2.4 away from the moving block 2.3, the hob 2.5 is transmission-connected to the motor 2.31 via the connecting piece 2.4, and the ruler 2.6 is arranged parallel to the screw 2.2 and fixedly connected to the bracket 2.1.

[0022] As a preferred implementation scheme of this embodiment, the arc pressing roller 4 can adjust the width according to the width of the raw material coil, and there are multiple arc pressing rollers 4. The first arc pressing roller 4 along the feeding direction is provided with an edge scrubbing and dust removal device 3.

[0023] As a preferred implementation scheme of this embodiment, there are multiple preliminary shaping and rounding rollers 5, which are symmetrically arranged on both sides of the raw material coil.

[0024] As a preferred implementation scheme of this embodiment, the precise rounding machine 8 has 2 wheels, 4 wheels, 6 wheels, or 8 wheels symmetrically arranged, and is driven by chain transmission or shaft-driven rubber pressure wheel transmission.

[0025] As a preferred implementation scheme of this embodiment, a continuous flaw detection device 9 for continuous flaw detection of welds and a round tube linear motion roller 10 are provided behind the precise rounding machine 8 along the feeding direction. The continuous flaw detection device 9 is used to detect the welding quality at the joint of the round tube, and the round tube linear motion roller 10 is arranged in pairs on both sides of the round tube, and is used for rotational motion to guide the round tube to move along its axial direction.

[0026] In the specific implementation of the present invention, the unwinder, the sizing and trimming device, the edge scrubbing and dust removal device, the arc pressing roller, the preliminary shaping and rounding roller, the pipe diameter sizing roller, the double-sided welding device, the grinder, etc. are sequentially arranged in a transportable and hoisting container along the feeding direction, and the processing location can be flexibly selected according to the construction location by car. When in use, the unwinder rotates and unfolds the stainless steel raw material coil and conveys it to the flattening roller. The sizing and trimming device arranged on the flattening roller determines the required width of the stainless steel coil according to the diameter of the old pipe on site. The coil is conveyed from the flattening roller to the edge scrubbing and dust removal device to scrub and dust the trimmed edge. After the treatment is completed, the stainless steel plate is rolled into a round tube with an edge that is close to "tight fit" through the arc pressing roller and the preliminary shaping and rounding roller. The opening of the round tube is welded on both sides inside and outside through the double-sided welding device. After the welding is completed, the weld is leveled and polished by the grinder, and the stainless steel tube with a precise round shape is obtained through the flaw detection and the precise rounding machine. Stainless steel pipes can be combined with a reducing machine and a traction machine to achieve a "one-step" short process construction of pipe making, welding, flaw detection, reducing the diameter, traction into the pipe, and pressure shaping (testing).

[0027] The shape and size of the present invention can be determined according to the range of pipe diameter, and the adjustment of length, width and height should not exceed the national restrictions on road transportation, but the internal structure and principle remain unchanged.

[0028] The following embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A skid-mounted stainless steel liner pipe on-site pipe making unit, which includes an unwinder, a sizing and trimming device, an edge scrubbing and dust removal device, an arc pressing roller, a preliminary shaping and rounding roller, a double-sided welding device, a grinder, and a precise rounding machine in the feeding direction, characterized in that: The uncoiler is used to unfold the raw material coil, the sizing and trimming device is used to perform standard trimming on the raw materials that do not meet the size requirements, the edge scrubbing and dust removal device is used to grind and wipe the dust on the edge welding of the raw material coil, the arc pressing roller is used to press the arc on the feeding edge of the raw material coil to form a preliminary flat arc shape, the preliminary shaping and rounding roller is used to shape and round the raw material coil to initially form a round shape, the double-sided welding device is used to perform double-sided welding on the opening of the tube body, so that the raw material coil is transformed from a plate body into a closed round tube body, the grinder is used to level and grind the external weld, and the precise rounding machine is used to perform a third precise rounding on the round tube after welding and grinding and linearly drive the tube, the uncoiler, sizing and trimming device, edge scrubbing and dust removal device, arc pressing roller, preliminary shaping and rounding roller, double-sided welding device, grinder, and precise rounding machine are sequentially placed in a container that can be used for lifting and transportation; The uncoiler is provided with a foldable automatic centering device, and the sizing and trimming device is provided with an adjustable and detachable roller cutter; The sizing and trimming device includes a bracket, a screw, a moving block, a connecting piece, a hob, a ruler, a motor 1, and a motor 2. The bracket is arranged in a door shape on both sides of the raw material coil, and one side of the bracket is provided with a motor 2 fixedly connected to it, and a screw connecting the brackets on both sides is arranged in the middle, and a moving block matching with the screw is arranged on the screw, and a threaded hole matching with the screw is arranged in the middle of the moving block, and a motor 1 fixedly connected to it is arranged above the moving block, and a connecting piece fixedly connected to it is arranged below the moving block, and a hob is arranged at one end of the connecting piece away from the moving block, and the hob is connected to the motor 1 through the connecting piece. The ruler is arranged parallel to the screw and fixedly connected to the bracket; The width of the arc pressing roller can be adjusted according to the width of the raw material coil. There are multiple arc pressing rollers, and an edge scrubbing and dust removal device is arranged on the first arc pressing roller along the feeding direction.

2. The skid-mounted stainless steel lined pipe on-site pipe making unit according to claim 1 is characterized in that: The preliminary shaping and rounding rollers are multiple and symmetrically arranged on both sides of the raw material coil.

3. The skid-mounted stainless steel lined pipe on-site pipe making unit according to claim 1 is characterized in that: The precise rounding machine has two wheels, four wheels, six wheels or eight wheels that are symmetrically arranged, and is driven by a chain transmission or a shaft driving a rubber pressure wheel.

4. The skid-mounted stainless steel lined pipe on-site pipe making unit according to claim 1 is characterized in that: A continuous flaw detection device for continuous flaw detection of welds and a round tube linear motion roller are also arranged behind the precise rounding machine along the feeding direction. The continuous flaw detection device is used to detect the welding quality at the joint of the round tube. The round tube linear motion rollers are arranged in pairs on both sides of the round tube, and are used to rotate and guide the round tube to move along its axial direction.

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