A processing device and a processing method for corrosion-resistant seamless steel pipe

Abstract

The present invention discloses a processing device and a processing method for corrosion-resistant seamless steel pipes, and belongs to the technical field of seamless steel pipe processing. It includes a steel pipe feeding mechanism, a positioning clamping assembly, an end clamp, a corrosion-inhibiting coating assembly and a processing spindle assembly, wherein the corrosion-inhibiting coating assembly includes a first linear drive, a first cylinder is fixed at the driving end of the first linear drive, and a plurality of coating heads are fixed at intervals at one end of the first cylinder, and the processing spindle assembly includes a second linear drive and a processing module, and the processing module includes a corrosion-resistant injection head, an isolation air dryer, a rinser and a roughening device connected in sequence; the corrosion-inhibiting coating assembly and the processing spindle assembly are arranged opposite to each other at both ends of the positioning clamping assembly. The processing device and the processing method for corrosion-resistant seamless steel pipe of the present invention, by coating a corrosion-inhibiting protective layer on the electroplating layer, can complete the roughening, cleaning, air drying and coating of the electroplating layer at one time during coating, with high coating efficiency and strong anti-peeling ability of the protective layer.

Description

Technical Field

[0001] The present invention specifically relates to a processing device and a processing method for a corrosion-resistant seamless steel pipe, and belongs to the technical field of seamless steel pipe processing. Background Art

[0002] The fluid medium transmitted by the seamless steel pipe is often accompanied by an acidic medium, which can easily cause corrosion of the seamless steel pipe. In the prior art, in order to improve the corrosion resistance of the seamless steel pipe, a protective layer is electroplated inside the seamless steel pipe in many cases. The electroplated protective layer includes a zinc plating layer, a nickel plating layer and a chromium plating layer, which can improve the corrosion resistance. For example, Chinese Patent Publication No.: CN103924273B discloses a treatment process for a corrosion-resistant seamless steel pipe. The process adopts tube blank forming treatment, cleaning treatment, tube material electroplating nickel treatment, chromium plating treatment and secondary inspection to improve the corrosion resistance of the seamless steel pipe. However, the existing electroplating layer, such as the zinc plating layer, is prone to thermal deformation and oxidation of the coating under high temperature or high pressure environment, thereby affecting its corrosion resistance. In addition, for the existing electroplating layer in a strong acidic environment, although the corrosion rate can be slowed down, the corrosion resistance will be greatly affected by the environment, and the electroplating layer cannot accurately control the uniformity of the coating. When corrosion penetration occurs at a certain point of the electroplating layer, the fluid medium continues to contact the point, which will cause the point to gradually expand and the corrosion will become more serious. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a processing device and method for corrosion-resistant seamless steel pipes. By coating a corrosion-inhibiting protective layer on the electroplating layer, the electroplating layer can be roughened, cleaned, air-dried and coated at one time. The coating efficiency is high and the corrosion-inhibiting protective layer has strong anti-peeling ability.

[0004] The processing device of the corrosion-resistant seamless steel pipe of the present invention comprises:

[0005] A steel pipe feeding mechanism, the steel pipe feeding mechanism comprising a transmission chain belt driven by a feeding drive motor;

[0006] A positioning clamping assembly, the positioning clamping assembly comprising a lower hydraulic clamping member installed in the middle of the bottom surface of the transmission chain belt, and an upper hydraulic clamping member installed on the top surface of the transmission chain belt, the upper hydraulic clamping member and the lower hydraulic clamping member are installed opposite to each other;

[0007] The end clamp comprises a cylinder seat fixed to the top surfaces of both ends of the lower hydraulic clamp; an end cylinder is fixed on the cylinder seat, a pressure plate is fixed on the piston rod of the end cylinder, and the pressure plate is pressed against the lower edge of the end of the steel pipe;

[0008] The corrosion-inhibiting coating assembly comprises a first linear drive, a first cylinder is fixed to the driving end of the first linear drive, a plurality of coating heads are fixed at intervals at one end of the first cylinder, the coating head comprises an equal-diameter disk, and a reduced-diameter disk is integrally formed at the end of the equal-diameter disk; the first cylinder and the steel pipe are on the same axis; the gap between the equal-diameter disk and the steel pipe is 12-18 μm;

[0009] A processing spindle assembly comprises a second linear drive and a processing module, wherein the processing module comprises a corrosion-resistant injection head, an isolation air dryer, a rinser and a roughener connected in sequence; the roughener is fixed to the driving end of the second linear drive.

[0010] The corrosion-inhibiting coating assembly and the processing spindle assembly are arranged opposite to each other at two ends of the positioning and clamping assembly.

[0011] Furthermore, the first linear drive and the second linear drive include a guide cylinder and a walking mechanism, wherein legs are fixed on both sides of the guide cylinder; a linear slideway is provided at the bottom of the guide cylinder; the first column and the bottom surface of the roughener are integrally formed with a slider slidably mounted on the linear slideway, and the walking mechanism includes two pedestals, on which sprockets are respectively mounted through bearings, one of the sprockets being mounted to a walking drive motor; the walking drive motor is fixed to the pedestal; a driving chain is mounted on the two sprockets, and the slider is fixed to the driving chain through a connecting plate; the walking drive motor drives the sprocket to rotate, thereby causing the driving chain to move synchronously, and driving the slider and the first column to slide linearly along the guide cylinder and the linear slideway.

[0012] Furthermore, the lower hydraulic clamping member includes a support, and slide rails are fixed to the top surfaces of both ends of the support; a lower seat plate is slidably arranged between the slide rails; a lower hydraulic cylinder is fixed between the lower seat plate and the support; the upper hydraulic clamping member includes an upper hydraulic cylinder, and an upper seat plate is fixed to the bottom surface of the upper hydraulic cylinder, and the upper hydraulic cylinder is fixed to the hanging beam by bolts and nuts; multiple groups of clamping heads are fixed to the surfaces of the upper seat plate and the lower seat plate close to each other; the clamping head includes a concave wheel seat, and pressure wheels are movably installed at both ends of the wheel seat; the upper hydraulic cylinder and the lower hydraulic cylinder can respectively drive the upper seat plate and the lower seat plate to move up and down, and clamp and return the steel pipe through the pressure wheels.

[0013] Furthermore, a diversion channel is hinged on one side of the cylinder seat near the lower hydraulic clamp, and a positioning cylinder is hinged on the bottom surface of one end of the diversion channel; the other end of the positioning cylinder is hinged to the side of the slide rail, and the diversion channel is swung by the positioning cylinder, so that the diversion channel can be guided, thereby enabling the flushing water and anti-corrosion coating brought out of the end of the steel pipe to be collected and processed separately.

[0014] Furthermore, the roughening device includes a first pipe section and a sleeve, the first pipe section is a convex structure; a hollow rotating mechanism is embedded and fixed inside the sleeve, and a ring-shaped grinding wheel is fixed to the rotating end of the hollow rotating mechanism; the grinding wheel fits the inner wall of the steel pipe, the first pipe section moves through the sleeve and the grinding wheel, and the sleeve is fixed to the first pipe section by bolts; the sleeve is fastened to the thick-diameter end of the first pipe section by bolts; a plurality of guide pipes are fixed inside the first pipe section; one end of the guide pipe extends out of the end of the first pipe section, and the other end is arranged inside the first pipe section ; When the roughener is working, the hollow rotating mechanism drives the grinding wheel to rotate, and drives linearly through the second linear drive to achieve sanding and roughening of the electroplating layer inside the steel pipe; thereby, the corrosion inhibition protective layer and the electroplating layer can be closely combined, and the corrosion inhibition protective layer enhances the corrosion resistance of the electroplating layer, while forming tension on the surface of the electroplating layer; improving the deformation resistance of the electroplating layer; the hollow rotating mechanism is installed in the sleeve, and the sleeve is supported by the first pipe section, and multiple guide pipes are arranged inside the first pipe section, one end of the guide pipe is docked with the components of the processing spindle assembly, and the other end is docked with external equipment;

[0015] The washer comprises a second pipe section, the end of the second pipe section and the end of the first pipe section are integrally formed with a protrusion and an embedding groove that fit in with each other, and the protrusion and the embedding groove are fastened by bolts after being embedded; a first sealing sleeve is fixed to the outside of the second pipe section by bolts, and first end seals are embedded and fixed at both ends of the second pipe section, a first inner tube and a second inner tube are embedded and passed through the two first end seals, and a water inlet pipe and a water suction pipe are embedded and fixed on the first end seal close to the first sealing sleeve; a ring of pressure nozzles are fixed at intervals in the circumference of the second pipe section, and a drainage nozzle is screwed on the bottom of the second pipe section; the drainage nozzle is screwed to the suction pipe, the water inlet pipe is a hollow structure at one end inside the second pipe section, and the suction pipe is a closed structure at one end inside the second pipe section, and a threaded blind hole is opened on the second pipe section;

[0016] During flushing, pressurized water is provided by external equipment, and the pressurized water enters the second pipe section through the guide pipe, and a flow storage chamber is formed inside the second pipe section. By arranging a pressure nozzle on the flow storage chamber, the pressure nozzle sprays pressure impact water flow, and the water flow collects the powder after grinding into the first sealing sleeve, the second sealing sleeve and the inner wall of the steel pipe to form a collecting chamber. Finally, the water flow and powder in the collecting chamber are sucked out of the inner wall of the seamless steel pipe through the drainage nozzle to complete the cleaning of this position.

[0017] An isolation air dryer, the isolation air dryer comprising a third pipe section, the third pipe section is sleeved on the outside of the second pipe section and fastened with a threaded blind hole by bolts; a threaded groove is provided at one end of the third pipe section away from the second pipe section; a second sealing sleeve and a third sealing sleeve are fixed to the outside of both ends of the third pipe section; a ring air knife air nozzle is provided between the second sealing sleeve and the third sealing sleeve; and second end seals are fixed to both ends of the third pipe section;

[0018] During air drying, high-pressure air is provided by external equipment. The high-pressure air provides linear high-pressure air to the cleaned part through the air knife nozzle. The high-pressure air quickly dries the cleaned part. In order to prevent pressure build-up, an independent exhaust pipe can be set in the first pipe section and the second pipe section, and an exhaust hood can be set outside the third pipe section. By connecting the exhaust hood with the discharge pipe;

[0019] The first inner tube passes through two second end seals; the second inner tube passes through a second end seal near one end of the second tube section, and the first inner tube is screwed with a limiting nut on the outside of the second end seal;

[0020] The corrosion-resistant injection head comprises a nut screwed to the thread groove of the third pipe section; the nut is tightly pressed against the second end seal; and a plurality of liquid supply heads are screwed to the nut;

[0021] The cleaned part is coated with a coating layer, and an anti-corrosion coating liquid of a corrosion-inhibiting protective layer is provided to the first inner tube through an external device. The first inner tube delivers the anti-corrosion coating liquid to the liquid supply head and accumulates the liquid between the third sealing sleeve and the coating head. Then, the coating head is used for thickness coating. The coating thickness can be determined by the distance between the outer wall of the coating head and the inner wall of the electroplating layer; wherein, the thickness of the corrosion-inhibiting protective layer is 12-18 μm;

[0022] The first inner tube, the second inner tube, the water inlet pipe and the water suction pipe are respectively connected to a guide pipe; the external equipment includes a feed pump, a high-pressure fan, a water suction pump and a water supply pump; the first inner tube is connected to the feed pump through the guide pipe, the second inner tube is connected to the high-pressure fan through the guide pipe, and the water inlet pipe and the water suction pipe are respectively connected to the water suction pump and the water supply pump through the guide pipe;

[0023] The first to third sealing sleeves are all sleeved and fixed with leather cups on their exteriors, and the exteriors of the leather cups are tightly attached to the outer wall of the steel pipe, forming a closed surface through the outer edge of the leather cups and the inner wall of the steel pipe.

[0024] Furthermore, the first inner tube, the second inner tube, the water inlet pipe and the water suction pipe are installed on the end of the flow guide pipe by being embedded, or are made integrally with the flow guide pipe.

[0025] Furthermore, the first end seal and the second end seal are orifice plates welded to the ends of the second pipe segment and the third pipe segment, or plungers embedded in the second pipe segment and the third pipe segment.

[0026] Furthermore, the hollow rotating mechanism is a hollow motor or a hollow reduction driver, and the rotor of the hollow motor is a hollow rotor composed of a Halbach magnetic ring; the hollow reduction driver includes a gear sleeve, and a gear ring is installed on the inner side of the gear sleeve; a gear ring drive motor is fixed to the end of the gear sleeve away from the grinding wheel, and the output shaft of the gear ring drive motor is embedded in the inner side of the gear sleeve and fixed with a driving gear disk, and the driving gear disk is meshed with the gear ring; the first pipe section can pass through the center of the hollow rotor or the gear ring, and a safety gap is set with the inner wall of the hollow rotor or the gear ring; the hollow motor drives the hollow rotor to rotate, or the gear ring drive motor drives the gear ring to rotate, thereby driving the grinding wheel to rotate, and the grinding wheel roughens the electroplating layer; the grinding wheel adopts 1200 mesh to form a rough layer of 3.5~5μm on the surface of the electroplating layer.

[0027] Furthermore, the corrosion-inhibiting coating assembly and the processing spindle assembly are provided with a core column and an embedding hole that are interlocked and docked with each other near one end. Through the cooperation of the core column and the embedding hole, the corrosion-inhibiting coating assembly and the processing spindle assembly can be aligned, thereby ensuring the working linearity of the processing spindle assembly when the processing spindle assembly is working.

[0028] A method for processing a corrosion-resistant seamless steel pipe, using a processing device for the corrosion-resistant seamless steel pipe, the method comprising:

[0029] The first step is to feed the steel pipe, which is to feed the steel pipe that has been electroplated internally into the steel pipe feeding mechanism. The thickness of the electroplating layer inside the steel pipe is 35-40 μm. Then, the steel pipe to be treated is fed into the positioning clamping assembly through the steel pipe feeding mechanism.

[0030] The second step is to clamp and position the steel pipe. The lower hydraulic clamp rises above the transmission chain belt to lift the steel pipe, and the steel pipe falls onto the lower hydraulic clamp. Then, the end clamps clamp the lower edges of both ends of the steel pipe, and then drive the upper hydraulic clamp downward, and press the upper hydraulic clamp onto the upper part of the steel pipe to complete the clamping of the steel pipe.

[0031] The third step is pretreatment before coating. During pretreatment, the corrosion-inhibiting coating assembly is driven into the interior of the steel pipe by the first linear drive and docked with the processing spindle assembly at the other end of the steel pipe. Then, the first linear drive is driven to rotate in the reverse direction, and the second linear drive is rotated synchronously at the same time, so that the processing spindle assembly enters the interior of the steel pipe. Then, the first roughening is started. When working, the roughening device is turned on to grind from the inner wall of one end of the steel pipe to the inner wall of the other end;

[0032] The fourth step is synchronous coating. When working, the first linear drive and the second linear drive are reversed, and the roughener, high-pressure fan, water suction pump and water supply pump are turned on; the inside of the steel pipe is roughened, and water washing and drainage are carried out simultaneously. Then, the inside of the steel pipe is quickly dried by high-pressure wind. When the processing spindle assembly moves, the corrosion-inhibiting coating assembly moves synchronously until a coating head enters the inner end of the steel pipe, and the roughener, high-pressure fan, water suction pump, water supply pump, first linear drive and second linear drive are turned off, and the feed pump is turned on until overflow appears on the upper part of the coating head. The roughener, high-pressure fan, water suction pump, water supply pump, first linear drive and second linear drive are turned on again, and the feed pump is kept feeding continuously until the coating head slides out of the other end of the steel pipe, and the roughener, water suction pump, water supply pump, high-pressure fan and feed pump are turned off in turn; then, the first linear drive drives the corrosion-inhibiting coating assembly to reset;

[0033] The fifth step is to discharge the steel pipe, reset the positioning and clamping assembly, and send the processed steel pipe out of the positioning and clamping assembly through the steel pipe feeding mechanism to wait for drying and curing.

[0034] Compared with the prior art, the processing device and method of the corrosion-resistant seamless steel pipe of the present invention adopt the combination of the electroplating layer and the corrosion inhibition protective layer to realize the enhancement of the corrosion resistance of the electroplating layer. At the same time, the corrosion inhibition protective layer is closely combined with the electroplating layer and tension is formed on the surface of the electroplating layer, so as to improve the heat deformation resistance and oxidation resistance of the electroplating layer. By coating the corrosion inhibition protective layer on the electroplating layer, the electroplating layer can be roughened, cleaned, air-dried and coated at one time during coating, so as to ensure that the coating operation surface is directly coated after the surface is cleaned, thereby achieving dust-free coating and improving the anti-peeling ability of the corrosion inhibition protective layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the steel pipe feeding mechanism, positioning clamping assembly and end clamp installation structure of the present invention.

[0036] Figure 2 For the present invention Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0037] Figure 3 It is a schematic diagram of the installation structure of the positioning clamping assembly, the diversion channel and the adjustment cylinder of the present invention.

[0038] Figure 4 It is a schematic diagram of the upper hydraulic clamping member and the hanging beam installation structure of the present invention.

[0039] Figure 5 It is a schematic diagram of the installation structure of the corrosion-inhibiting coating assembly and the first linear drive of the present invention.

[0040] Figure 6It is a schematic diagram of the installation structure of the processing spindle assembly and the second linear drive of the present invention.

[0041] Figure 7 It is a schematic diagram of the installation structure of the guide cylinder and the first column of the present invention.

[0042] Figure 8 This is a schematic diagram of the structure of the processing spindle assembly of the present invention before assembly.

[0043] Fig. 9 For the present invention Figure 8 Schematic diagram of the local enlarged structure at point B in the middle.

[0044] Fig.10 It is a schematic diagram of the structure of the processing spindle assembly after assembly of the present invention.

[0045] Fig.11 It is a schematic diagram of the structure of the hollow reduction driver of the present invention.

[0046] Fig.12 It is a schematic diagram of the structure of the hollow reduction driver of the present invention.

[0047] Figure numerals: 1, feeding drive motor, 2, transmission chain belt, 3, cylinder seat, 4, end cylinder, 5, pressure plate, 6, steel pipe, 7, first column, 8, coating head, 9, equal diameter plate, 10, reduced diameter plate, 11, guide cylinder, 12, support foot, 13, linear slide, 14, slider, 15, pedestal, 16, sprocket, 17, driving chain, 18, support, 19, slide rail, 20, lower seat plate, 21, lower hydraulic cylinder, 22, upper hydraulic cylinder, 23, upper seat plate, 24, hanging beam, 25, wheel seat, 26, pressure wheel, 27, diversion channel, 28, adjustment cylinder, 29, first pipe section, 30 , sleeve, 31, hollow rotating mechanism, 32, grinding wheel, 33, guide tube, 34, second pipe section, 35, protrusion, 36, first sealing sleeve, 37, first end seal, 38, first inner tube, 39, second inner tube, 40, water inlet pipe, 41, water suction pipe, 42, pressure nozzle, 43, drainage suction nozzle, 44, third pipe section, 45, second sealing sleeve, 46, third sealing sleeve, 47, air knife nozzle, 48, second end seal, 49, nut, 50, liquid supply head, 51, gear sleeve, 52, gear ring, 53, gear ring drive motor, 54, drive gear disc, 55, core column, 56, embedded hole. DETAILED DESCRIPTION

[0048] Example:

[0049] like Figures 1 to 12 The processing device of the corrosion-resistant seamless steel pipe shown comprises:

[0050] A steel pipe feeding mechanism, the steel pipe feeding mechanism comprises a transmission chain belt 2 driven by a feeding drive motor 1;

[0051] A positioning clamping assembly, the positioning clamping assembly comprises a lower hydraulic clamping member installed in the middle of the bottom surface of the transmission chain belt 2, and an upper hydraulic clamping member installed on the top surface of the transmission chain belt 2, the upper hydraulic clamping member and the lower hydraulic clamping member are installed opposite to each other;

[0052] The end chuck comprises a cylinder seat 3 fixed to the top surfaces of both ends of the lower hydraulic clamp; an end cylinder 4 is fixed on the cylinder seat 3, a pressure plate 5 is fixed on the piston rod of the end cylinder 4, and the pressure plate 5 is pressed against the lower edge of the end of the steel pipe 6;

[0053] The corrosion-inhibiting coating assembly comprises a first linear drive, a first cylinder 7 is fixed to the driving end of the first linear drive, a plurality of coating heads 8 are fixed at intervals at one end of the first cylinder 7, the coating head 8 comprises an equal-diameter disk 9, and a reduced-diameter disk 10 is integrally formed at the end of the equal-diameter disk 9; the first cylinder 7 and the steel pipe 6 are on the same axis; the gap between the equal-diameter disk 9 and the steel pipe 6 is 12-18 μm;

[0054] A processing spindle assembly comprises a second linear drive and a processing module, wherein the processing module comprises a corrosion-resistant injection head, an isolation air dryer, a rinser and a roughener connected in sequence; the roughener is fixed to the driving end of the second linear drive.

[0055] The corrosion-inhibiting coating assembly and the processing spindle assembly are arranged opposite to each other at two ends of the positioning and clamping assembly.

[0056] The first linear drive and the second linear drive include a guide cylinder 11 and a walking mechanism, wherein legs 12 are fixed on both sides of the guide cylinder 11; a linear slideway 13 is provided at the bottom of the guide cylinder 11; the first column 7 and the bottom surface of the coarsening device are integrally formed with a slider 14 slidably mounted on the linear slideway 13, and the walking mechanism includes two pedestals 15, on which sprockets 16 are respectively mounted through bearings, and one of the sprockets 16 is mounted with a walking drive motor; the walking drive motor is fixed on the pedestal 15; a driving chain 17 is mounted on the two sprockets 16, and the slider 14 is fixed to the driving chain 17 through a connecting plate; the walking drive motor drives the sprocket 16 to rotate, thereby causing the driving chain 17 to move synchronously, and driving the slider 14 and the first column 7 to slide linearly along the guide cylinder 11 and the linear slideway 13.

[0057] The lower hydraulic clamping member includes a support 18, and slide rails 19 are fixed to the top surfaces of both ends of the support 18; a lower seat plate 20 is slidably arranged between the slide rails 19; a lower hydraulic cylinder 21 is fixed between the lower seat plate 20 and the support 18; the upper hydraulic clamping member includes an upper hydraulic cylinder 22, and an upper seat plate 23 is fixed to the bottom surface of the upper hydraulic cylinder 22, and the upper hydraulic cylinder 22 is fixed to the hanging beam 24 by bolts and nuts; multiple groups of clamping heads are fixed to the surfaces close to each other of the upper seat plate 23 and the lower seat plate 20; the clamping head includes a concave wheel seat 25, and pressure wheels 26 are movably installed at both ends of the wheel seat 25; the upper hydraulic cylinder 22 and the lower hydraulic cylinder 21 can respectively drive the upper seat plate 23 and the lower seat plate 20 up and down, and clamp and return the steel pipe 6 by the pressure wheel 26.

[0058] A diversion channel 27 is hinged on one side of the cylinder seat 3 near the lower hydraulic clamp, and a positioning cylinder 28 is hinged on the bottom surface of one end of the diversion channel 27; the other end of the positioning cylinder 28 is hinged to the side of the slide rail 19, and the diversion channel 27 swings, and the positioning cylinder 28 swings, so that the diversion channel 27 can be guided, so that the flushing water and anti-corrosion coating brought out of the end of the steel pipe 6 can be collected and processed separately.

[0059] The roughening device includes a first pipe section 29 and a sleeve 30. The first pipe section 29 is a convex structure. A hollow rotating mechanism 31 is embedded and fixed inside the sleeve 30. A ring-shaped grinding wheel 32 is fixed to the rotating end of the hollow rotating mechanism 31. The grinding wheel 32 is in contact with the inner wall of the steel pipe 6. The first pipe section 29 moves through the sleeve 30 and the grinding wheel 32. The sleeve 30 is fixed to the first pipe section 29 by bolts. The sleeve 30 is fastened to the thick-diameter end of the first pipe section 29 by bolts. A plurality of guide pipes 33 are fixed inside the first pipe section 29. One end of the guide pipe 33 extends out of the end of the first pipe section 29, and the other end is arranged at Inside the first pipe section 29; when the roughener is working, the hollow rotating mechanism 31 drives the grinding wheel 32 to rotate, and drives linearly through the second linear drive to achieve sanding and roughening of the electroplating layer inside the steel pipe 6; thereby, the corrosion inhibition protective layer and the electroplating layer can be closely combined, and the corrosion inhibition protective layer strengthens the corrosion resistance of the electroplating layer, and at the same time forms tension on the surface of the electroplating layer; improves the deformation resistance of the electroplating layer; the hollow rotating mechanism 31 is installed in the sleeve 30, and the sleeve 30 is supported by the first pipe section 29, and multiple guide pipes 33 are arranged inside the first pipe section 29, and one end of the guide pipe 33 is docked with various components of the processing spindle assembly, and the other end is docked with external equipment;

[0060] The flusher includes a second pipe section 34, the end of the second pipe section 34 and the end of the first pipe section 29 are integrally formed with a protrusion 35 and an embedding groove that fit together, and the protrusion 35 and the embedding groove are fastened by bolts after being embedded; a first sealing sleeve 36 is fixed to the outside of the second pipe section 34 by bolts, and first end seals 37 are embedded and fixed at both ends of the second pipe section 34, and a first inner tube 38 and a second inner tube 39 are embedded and passed through the two first end seals 37, and a water inlet pipe 40 and a water suction pipe 41 are embedded and fixed on the first end seal 37 close to the first sealing sleeve 36; a ring of pressure nozzles 42 are fixed at intervals in the circumferential direction of the second pipe section 34, and a drainage suction nozzle 43 is screwed to the bottom of the second pipe section 34; the drainage suction nozzle 43 is screwed to the water suction pipe 41, the water inlet pipe 40 is a hollow structure at one end inside the second pipe section 34, and the water suction pipe 41 is a closed structure at one end inside the second pipe section 34, and a threaded blind hole is opened on the second pipe section 34;

[0061] During flushing, pressurized water is provided by an external device, and the pressurized water enters the second pipe section 34 through the guide pipe 33, and a flow storage chamber is formed inside the second pipe section 34. By arranging a pressure nozzle 42 on the flow storage chamber, the pressure nozzle 42 sprays a pressure impact water flow, and the water flow collects the powder after grinding into the first sealing sleeve 36, the second sealing sleeve and the inner wall of the steel pipe 6 to form a collecting chamber. Finally, the water flow and powder in the collecting chamber are sucked out of the inner wall of the steel pipe 6 through the drainage nozzle 43, and the cleaning of this position is completed;

[0062] An isolation air dryer, the isolation air dryer comprises a third pipe section 44, the third pipe section 44 is sleeved on the outside of the second pipe section 34, and is fastened with a threaded blind hole by bolts; a threaded groove is provided at one end of the third pipe section 44 away from the second pipe section 34; a second sealing sleeve 45 and a third sealing sleeve 46 are fixed to the outside of both ends of the third pipe section 44; a ring air knife air nozzle 47 is provided between the second sealing sleeve 45 and the third sealing sleeve 46; and second end seals 48 are fixed to both ends of the third pipe section 44;

[0063] During air drying, high-pressure air is provided by an external device, and the high-pressure air provides linear high-pressure air to the cleaned part through the air knife air nozzle 47, and the high-pressure air quickly dries the cleaned part. In order to prevent pressure build-up, an independent exhaust pipe can be provided in the first pipe section 29 and the second pipe section 34, and an exhaust hood can be provided outside the third pipe section 44, by connecting the exhaust hood with the discharge pipe;

[0064] The first inner tube 38 passes through two second end seals 48; the second inner tube 39 passes through the second end seal 48 near one end of the second tube section 34, and the first inner tube 38 is screwed with a limiting nut on the outside of the second end seal 48;

[0065] The corrosion-resistant injection head includes a nut 49 screwed to the thread groove of the third pipe section 44; the nut 49 is pressed tightly against the second end seal 48; and a plurality of liquid supply heads 50 are screwed to the nut 49;

[0066] The cleaned part is coated with a coating layer, and an anti-corrosion coating liquid of a corrosion-inhibiting protective layer is provided to the first inner tube 38 through an external device. The first inner tube 38 delivers the anti-corrosion coating liquid to the liquid supply head 50, and accumulates the liquid between the third sealing sleeve 46 and the coating head 8, and then the coating is performed through the coating head 8. The coating thickness can be determined by the distance between the outer wall of the coating head 8 and the inner wall of the electroplating layer; wherein, the thickness of the corrosion-inhibiting protective layer is 12-18 μm; the anti-corrosion coating liquid can be a ceramic film-forming liquid, a resin film-forming liquid or a corrosion-inhibiting film-forming liquid. Taking the corrosion-inhibiting film-forming liquid as an example, when coating, the HC-Y-01 corrosion inhibitor of Hubei Hechang New Materials Technology Co., Ltd. is used, and the HC-Y-01 corrosion inhibitor and diesel are pre-mixed in a 1:1 ratio. Mix, then, the mixed liquid is pumped into the steel pipe 6 through external equipment for immersion coating. The HC-Y-01 corrosion inhibitor coating has good adhesion, can quickly penetrate into the surface of the electroplating layer, has strong adhesion ability, and can quickly form a corrosion inhibition protective layer on the surface of the electroplating layer; the first inner tube 38, the second inner tube 39, the water inlet pipe 40 and the water suction pipe 41 are respectively connected to a guide pipe 33; the external equipment includes a feed pump, a high-pressure fan, a water suction pump and a water supply pump; the first inner tube 38 is connected to the feed pump through the guide pipe 33, the second inner tube 39 is connected to the high-pressure fan through the guide pipe 33, and the water inlet pipe 40 and the water suction pipe 41 are respectively connected to the water suction pump and the water supply pump through the guide pipe 33;

[0067] The first to third sealing sleeves 36 to 46 are all sleeved and fixed with leather cups on their exteriors, and the exteriors of the leather cups are in close contact with the outer wall of the steel pipe 6 , forming a closed surface through the outer edge of the leather cups and the inner wall of the steel pipe 6 .

[0068] The first inner tube 38 , the second inner tube 39 , the water inlet pipe 40 and the water suction pipe 41 are installed at the end of the flow guide pipe 33 by being embedded, or are made integrally with the flow guide pipe 33 .

[0069] The first end seal 37 and the second end seal 48 are orifice plates welded to the ends of the second pipe segment 34 and the third pipe segment 44 , or plungers embedded in the second pipe segment 34 and the third pipe segment 44 .

[0070] The hollow rotating mechanism 31 is a hollow motor or a hollow reduction driver, and the rotor of the hollow motor is a hollow rotor composed of a Halbach magnetic ring; the hollow reduction driver includes a gear sleeve 51, and a gear ring 52 is installed on the inner side of the gear sleeve 51; a gear ring drive motor 53 is fixed to the end of the gear sleeve 51 away from the grinding wheel 32, and the output shaft of the gear ring drive motor 53 is embedded in the inner side of the gear sleeve 51, and a driving gear disc 54 is fixed, and the driving gear disc 54 is meshed with the gear ring 52; the first pipe section 29 can pass through the center of the hollow rotor or the gear ring 52, and a safety gap is set with the inner wall of the hollow rotor or the gear ring 52; the hollow motor drives the hollow rotor to rotate, or the gear ring drive motor 53 drives the gear ring 52 to rotate, thereby driving the grinding wheel 32 to rotate, and the grinding wheel 32 roughens the electroplating layer; the grinding wheel 32 adopts 1200 mesh, so that a rough layer of 3.5~5μm is formed on the surface of the electroplating layer.

[0071] The corrosion-inhibiting coating assembly and the processing spindle assembly are provided with a core column 55 and an embedding hole 56 that are interlocked and docked with each other at one end close to each other. The core column 55 and the embedding hole 56 cooperate with each other to achieve the centering operation of the corrosion-inhibiting coating assembly and the processing spindle assembly, thereby ensuring the working linearity of the processing spindle assembly when the processing spindle assembly is working.

[0072] A method for processing a corrosion-resistant seamless steel pipe, using a processing device for the corrosion-resistant seamless steel pipe, the method comprising:

[0073] The first step is to feed the steel pipe 6 that has completed the internal electroplating treatment into the steel pipe feeding mechanism. The thickness of the electroplating layer inside the steel pipe 6 is 35-40 μm. Then, the steel pipe 6 to be treated is fed into the positioning clamping component through the steel pipe feeding mechanism. Fig.12 As shown in step S1;

[0074] The second step is to clamp and position the steel pipe. The lower hydraulic clamp rises above the transmission chain belt 2, thereby lifting the steel pipe 6, and the steel pipe 6 falls onto the lower hydraulic clamp. Then, the end clamps clamp the lower edges of both ends of the steel pipe 6, and then drive the upper hydraulic clamp downward, and press the upper hydraulic clamp onto the upper part of the steel pipe 6 to complete the clamping of the steel pipe 6.

[0075] The third step is pretreatment before coating. During pretreatment, the corrosion-inhibiting coating assembly is driven into the interior of the steel pipe 6 by the first linear drive and docked with the processing spindle assembly at the other end of the steel pipe 6. Fig.12 As shown in step S2, then, the first linear drive is driven to rotate in the reverse direction, and the second linear drive is rotated synchronously, so that the processing spindle assembly enters the interior of the steel pipe 6, and then the first roughening is started. When working, the roughening device is turned on and the inner wall of the steel pipe 6 is polished from one end to the inner wall of the other end, as shown in FIG. Fig.12 As shown in step S3;

[0076] The fourth step is synchronous coating. When working, the first linear drive and the second linear drive are switched, such as Fig.12 As shown in step S4, the roughening device, high-pressure blower, water suction pump and water supply pump are turned on; the inside of the steel pipe 6 is roughened, and water washing and drainage are performed simultaneously. Then, the inside of the steel pipe 6 is quickly dried by high-pressure wind. When the main shaft assembly moves forward, the corrosion inhibition coating assembly moves synchronously until a coating head 8 enters the inner end of the steel pipe 6, as shown in FIG. Fig.12 As shown in step S5, the roughener, the high-pressure fan, the water suction pump, the water supply pump, the first linear drive and the second linear drive are turned off, and the feed pump is turned on until overflow appears on the upper part of the coating head 8, and then the roughener, the high-pressure fan, the water suction pump, the water supply pump, the first linear drive and the second linear drive are turned on again, and the feed pump is kept feeding continuously until the coating head 8 slides out of the other end of the steel pipe 6, and the roughener, the water suction pump, the water supply pump, the high-pressure fan and the feed pump are turned off in turn; then, the first linear drive drives the corrosion-inhibiting coating assembly to reset, as shown in FIG. Fig.12 As shown in step S6.

[0077] In the fifth step, the steel pipe is discharged, the positioning and clamping assembly is reset, and the processed steel pipe 6 is sent out of the positioning and clamping assembly through the steel pipe feeding mechanism to wait for drying and curing.

[0078] The above embodiments are only preferred implementations of the present invention, so any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A processing device for corrosion-resistant seamless steel pipe, characterized in that: include: A steel pipe feeding mechanism, the steel pipe feeding mechanism comprising a transmission chain belt driven by a feeding drive motor; A positioning clamping assembly, the positioning clamping assembly comprising a lower hydraulic clamping member installed in the middle of the bottom surface of the transmission chain belt, and an upper hydraulic clamping member installed on the top surface of the transmission chain belt, the upper hydraulic clamping member and the lower hydraulic clamping member are installed opposite to each other; The end clamp comprises a cylinder seat fixed to the top surfaces of both ends of the lower hydraulic clamp; an end cylinder is fixed on the cylinder seat, a pressure plate is fixed on the piston rod of the end cylinder, and the pressure plate is pressed against the lower edge of the end of the steel pipe; The corrosion-inhibiting coating assembly comprises a first linear drive, a first cylinder is fixed to the driving end of the first linear drive, a plurality of coating heads are fixed at intervals at one end of the first cylinder, the coating head comprises an equal-diameter disk, and a reduced-diameter disk is integrally formed at the end of the equal-diameter disk; the first cylinder and the steel pipe are on the same axis; the gap between the equal-diameter disk and the steel pipe is 12-18 μm; A processing spindle assembly, the processing spindle assembly includes a second linear drive and a processing module, the processing module includes an anti-corrosion injection head, an isolation air dryer, a rinser and a roughener connected in sequence; the roughener is fixed to the driving end of the second linear drive; The corrosion inhibition coating assembly and the processing spindle assembly are arranged opposite to each other at two ends of the positioning and clamping assembly; The roughening device comprises a first pipe section and a sleeve, wherein the first pipe section is a convex structure; a hollow rotating mechanism is embedded and fixed inside the sleeve, and an annular grinding wheel is fixed to the rotating end of the hollow rotating mechanism; the grinding wheel is fitted with the inner wall of the steel pipe, the first pipe section moves through the sleeve and the grinding wheel, and the sleeve is fixed to the first pipe section by bolts; the sleeve is fastened to the thick-diameter end of the first pipe section by bolts; a plurality of guide pipes are fixed inside the first pipe section; one end of the guide pipe extends out of the end of the first pipe section, and the other end is arranged inside the first pipe section; The washer comprises a second pipe section, the end of the second pipe section and the end of the first pipe section are integrally formed with a protrusion and an embedding groove that fit in with each other, and the protrusion and the embedding groove are fastened by bolts after being embedded; a first sealing sleeve is fixed to the outside of the second pipe section by bolts, and first end seals are embedded and fixed at both ends of the second pipe section, a first inner tube and a second inner tube are embedded and passed through the two first end seals, and a water inlet pipe and a water suction pipe are embedded and fixed on the first end seal close to the first sealing sleeve; a ring of pressure nozzles are fixed at intervals in the circumference of the second pipe section, and a drainage nozzle is screwed on the bottom of the second pipe section; the drainage nozzle is screwed to the suction pipe, the water inlet pipe is a hollow structure at one end inside the second pipe section, and the suction pipe is a closed structure at one end inside the second pipe section, and a threaded blind hole is opened on the second pipe section; An isolation air dryer, the isolation air dryer comprising a third pipe section, the third pipe section is sleeved on the outside of the second pipe section and fastened with a threaded blind hole by bolts; a threaded groove is provided at one end of the third pipe section away from the second pipe section; a second sealing sleeve and a third sealing sleeve are fixed to the outside of both ends of the third pipe section; a ring air knife air nozzle is provided between the second sealing sleeve and the third sealing sleeve; and second end seals are fixed to both ends of the third pipe section; The first inner tube passes through two second end seals; the second inner tube passes through a second end seal near one end of the second tube section, and the first inner tube is screwed with a limiting nut on the outside of the second end seal; The corrosion-resistant injection head comprises a nut screwed to the thread groove of the third pipe section; the nut is tightly pressed against the second end seal; and a plurality of liquid supply heads are screwed to the nut; The first inner tube, the second inner tube, the water inlet pipe and the water suction pipe are respectively connected to a flow guide pipe; The first inner tube is connected to the feed pump through a guide tube, the second inner tube is connected to the high-pressure blower through a guide tube, and the water inlet pipe and the water suction pipe are connected to the water suction pump and the water supply pump respectively through the guide tube; The outsides of the first to third sealing sleeves are all sleeved and fixed with leather cups, and the outsides of the leather cups are tightly attached to the outer wall of the steel pipe.

2. The corrosion-resistant seamless steel pipe processing device according to claim 1, characterized in that: The first linear drive and the second linear drive include a guide cylinder and a walking mechanism, wherein legs are fixed on both sides of the guide cylinder; a linear slideway is provided at the bottom of the guide cylinder; the first column and the bottom surface of the roughening device are integrally formed with a slider slidably mounted on the linear slideway, and the walking mechanism includes two pedestals, sprockets are respectively mounted on the pedestals through bearings, and one of the sprockets is mounted on a walking drive motor; the walking drive motor is fixed on the pedestal; a driving chain is mounted on the two sprockets, and the slider is fixed to the driving chain through a connecting plate.

3. The processing device for corrosion-resistant seamless steel pipe according to claim 1, characterized in that: The lower hydraulic clamping member includes a support, and slide rails are fixed to the top surfaces of both ends of the support; a lower seat plate is slidably arranged between the slide rails; a lower hydraulic cylinder is fixed between the lower seat plate and the support; the upper hydraulic clamping member includes an upper hydraulic cylinder, and an upper seat plate is fixed to the bottom surface of the upper hydraulic cylinder, and the upper hydraulic cylinder is fixed to the hanging beam by bolts and nuts; multiple groups of clamping heads are fixed to the surfaces of the upper seat plate and the lower seat plate close to each other; the clamping head includes a concave wheel seat, and pressure wheels are movably installed at both ends of the wheel seat.

4. The processing device for corrosion-resistant seamless steel pipe according to claim 1, characterized in that: A diversion channel is hingedly connected to one side of the oil cylinder seat close to the lower hydraulic clamping piece, and a positioning oil cylinder is hingedly connected to the bottom surface of one end of the diversion channel; the other end of the positioning oil cylinder is hinged to the side of the slide rail.

5. The processing device for corrosion-resistant seamless steel pipe according to claim 1, characterized in that: The first inner tube, the second inner tube, the water inlet pipe and the water suction pipe are installed at the end of the flow guide pipe by being embedded, or are made integrally with the flow guide pipe.

6. The corrosion-resistant seamless steel pipe processing device according to claim 1, characterized in that: The first end seal and the second end seal are orifice plates welded to the ends of the second pipe segment and the third pipe segment, or plungers embedded in the second pipe segment and the third pipe segment.

7. The processing device for corrosion-resistant seamless steel pipe according to claim 1, characterized in that: The hollow rotating mechanism is a hollow motor or a hollow reduction driver, and the rotor of the hollow motor is a hollow rotor composed of a Halbach magnetic ring; the hollow reduction driver includes a gear sleeve, and a gear ring is installed on the inner side of the gear sleeve; a gear ring drive motor is fixed to the end of the gear sleeve away from the grinding wheel, and the output shaft of the gear ring drive motor is embedded in the inner side of the gear sleeve and fixed with a driving gear disc, and the driving gear disc is meshed with the gear ring.

8. The corrosion-resistant seamless steel pipe processing device according to claim 1, characterized in that: The corrosion-inhibiting coating assembly and the processing spindle assembly are provided with core columns and embedded holes that are embedded and butted with each other at one end close to each other.

9. A method for processing a corrosion-resistant seamless steel pipe, using the corrosion-resistant seamless steel pipe processing device according to any one of claims 1 to 8, characterized in that: The method comprises: The first step is to feed the steel pipe, and feed the steel pipe to be processed into the positioning clamping assembly through the steel pipe feeding mechanism; The second step is to clamp and position the steel pipe. The lower hydraulic clamp rises above the transmission chain belt to lift the steel pipe, and the steel pipe falls onto the lower hydraulic clamp. Then, the end clamps clamp the lower edges of both ends of the steel pipe, and then drive the upper hydraulic clamp downward, and press the upper hydraulic clamp onto the upper part of the steel pipe to complete the clamping of the steel pipe. The third step is pretreatment before coating. During pretreatment, the corrosion-inhibiting coating assembly is driven into the interior of the steel pipe by the first linear drive and docked with the processing spindle assembly at the other end of the steel pipe. Then, the first linear drive is driven to rotate in the reverse direction, and the second linear drive is rotated synchronously at the same time, so that the processing spindle assembly enters the interior of the steel pipe. Then, the first roughening is started. When working, the roughening device is turned on to grind from the inner wall of one end of the steel pipe to the inner wall of the other end; The fourth step is synchronous coating. When working, the first linear drive and the second linear drive are reversed, and the roughener, high-pressure fan, water suction pump and water supply pump are turned on; the inside of the steel pipe is roughened, and water washing and drainage are carried out simultaneously. Then, the inside of the steel pipe is quickly dried by high-pressure wind. When the processing spindle assembly moves, the corrosion-inhibiting coating assembly moves synchronously until a coating head enters the inner end of the steel pipe, and the roughener, high-pressure fan, water suction pump, water supply pump, first linear drive and second linear drive are turned off, and the feed pump is turned on until overflow appears on the upper part of the coating head, and the roughener, high-pressure fan, water suction pump, water supply pump, first linear drive and second linear drive are turned on again; and the feed pump is kept feeding continuously until the coating head slides out of the other end of the steel pipe, and the roughener, water suction pump, water supply pump, high-pressure fan and feed pump are turned off in turn; then, the first linear drive drives the corrosion-inhibiting coating assembly to reset; The fifth step is to discharge the steel pipe, reset the positioning and clamping assembly, and send the processed steel pipe out of the positioning and clamping assembly through the steel pipe feeding mechanism.

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