CN111644808A - Process and device for manufacturing corrosion-resistant pipe fitting of superheater - Google Patents
Process and device for manufacturing corrosion-resistant pipe fitting of superheater Download PDFInfo
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- CN111644808A CN111644808A CN202010407928.7A CN202010407928A CN111644808A CN 111644808 A CN111644808 A CN 111644808A CN 202010407928 A CN202010407928 A CN 202010407928A CN 111644808 A CN111644808 A CN 111644808A
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Abstract
The invention discloses a manufacturing process and a manufacturing device of a corrosion-resistant pipe fitting of a superheater, and aims to overcome the defect of low construction efficiency of an alloy protection layer on the surface of the pipe fitting. The method comprises the steps of pipe base material inspection, pipe base material surface polishing, pipe base material scribing, laser cladding and detection in sequence, adopts a laser cladding technology to make strict processing, manufacturing and inspection processes, does not damage the pipe base material in the laser cladding operation process, and has the advantages of high construction efficiency, low cost and obvious corrosion resistance, wear resistance and high temperature resistance effects.
Description
Technical Field
The invention relates to a superheater, in particular to a process and a device for manufacturing a corrosion-resistant pipe fitting of the superheater.
Background
The garbage incineration is an effective method for treating domestic garbage at present, and has the characteristics of volume reduction, harmlessness and resource utilization. However, the waste incineration process has serious corrosion to the heating surface, so that the service life of the heating surface is greatly shortened, and the frequent replacement of the heating surface causes trouble to the safe operation of the waste incinerator. The superheater is a part in the boiler for further heating the steam from the saturation temperature to the superheat temperature, and is an important device for ensuring the efficiency and steam parameters of the boiler. The superheater is arranged in the flue and is eroded and eroded transversely and longitudinally by the flue gas, and the erosion is more serious after the superheater is operated for a long time. Aiming at the corrosion problem, the traditional method is to thermally spray and build up weld a high-temperature-resistant and corrosion-resistant nickel-based alloy material on the wall of the superheater pipeline, but the thermal spraying and build up welding technology has high cost and unsatisfactory effect, and meanwhile, the build up welding has serious damage to the pipeline base material and extremely low construction efficiency, so that the requirement of batch production is difficult to meet.
Disclosure of Invention
In order to overcome the defects, the manufacturing process and the manufacturing device of the corrosion-resistant pipe fitting of the superheater are provided, the alloy protective layer is cladded on the surface of the pipe fitting, the base material of the pipe fitting cannot be damaged, the construction efficiency is high, the batch production is convenient, and the corrosion resistance, the wear resistance and the high temperature resistance of the pipe fitting are obvious.
In order to solve the technical problems, the invention adopts the following technical scheme: a manufacturing process of a corrosion-resistant pipe fitting of a superheater comprises the following steps:
a. checking the pipe fitting base material, wherein the size and the material of the pipe fitting base material are required to be consistent with the drawing, and the pipe fitting base material is required to have no damage and sand hole defects;
b. polishing the surface of the pipe fitting base material, removing various dirt and impurities on the surface of the pipe fitting base material, and enabling the surface of the pipe fitting base material to display uniform metal luster;
c. scribing a pipe base material, namely scribing a corrosion-resistant area of the pipe base material, and reserving non-corrosion-resistant area sections at two ends of the pipe base material;
d. laser cladding, namely cladding alloy powder to the position of an anti-corrosion area on the surface of the pipe base material in a laser cladding mode to form an alloy protective layer;
e. and (4) detecting, namely detecting the pipe fitting base material subjected to laser cladding, and removing unqualified pipe fitting base materials.
The method adopts a laser cladding technology to make strict processing, manufacturing and inspection processes, does not damage the pipe base material in the laser cladding operation process, has high construction efficiency and low cost, and has obvious corrosion resistance, wear resistance and high temperature resistance.
Preferably, the alloy powder is a high-grade Ni-Cr-W alloy powder. The Ni-Cr-W alloy powder has good corrosion resistance, high temperature resistance and wear resistance.
Preferably, in step e, the qualified pipe base material requires that the surface of the alloy protective layer is uniform, and a good smooth transition is formed between the alloy protective layer and the non-corrosion-resistant area section. Strict detection requirements are set for the tube base material, and quality guarantee is facilitated.
Preferably, in the step d, the material of the pipe base material is not changed, the pipe base material and the alloy powder are combined into metallurgical bonding, the cladding thickness is not less than 1mm, and the fusion depth is 0.2 mm. The alloy protective layer has long service life.
Preferably, the unqualified pipe base material detected in the step e is repaired and then detected again, and the unqualified pipe base material is not qualified yet to be scrapped. Unqualified pipe fitting substrate is reprocessed, make full use of resources, reduce cost, and the secondary detects still unqualifiedly and scraps, is favorable to guaranteeing product quality.
Preferably, after the step e, the qualified pipe fitting base material is subjected to pipe bending operation to form a bent pipe fitting, and the bent pipe fittings are sequentially spliced end to form the heater pipe fitting. The heater pipe fitting is formed by splicing the pipe fitting base material after bending the pipe fitting base material, and the processing is convenient.
A pipe bending device for a superheater corrosion-resistant pipe manufacturing process comprises a fixed wheel, a movable wheel and a bendable positioning pull bead, wherein a mounting arm driven by a motor to rotate is mounted at the center of the fixed wheel, the movable wheel is rotatably mounted on the mounting arm, a circle of annular positioning grooves are formed in the outer side wall of the fixed wheel and the outer side wall of the movable wheel, a pipe bending gap for mounting a pipe base material is formed between the two positioning grooves, and the positioning pull bead can be inserted into the pipe base material in a matching manner; the positioning pull beads comprise a plurality of positioning beads which are connected together through pull ropes, and the positioning beads are attracted and stacked together through magnet sheets; when the pipe fitting base material is bent, the positioning pull beads are inserted into the pipe fitting base material, and two ends of the positioning pull beads extend to the opening positions of two ends of the pipe fitting base material respectively.
When the pipe fitting substrate carries out the return bend operation, draw the pearl cartridge to the pipe fitting substrate with the location earlier, draw the pearl both ends to extend to pipe fitting substrate both ends open position respectively in the location, then will be equipped with the location and draw the pipe fitting substrate of pearl and insert the return bend clearance between tight pulley and the movable pulley, the motor drives the installation arm and rotates to make the movable pulley buckle to the pipe fitting substrate along tight pulley circumferential direction, draw the pearl to draw in the location after the completion of buckling and follow the pipe fitting substrate. Because the positioning pull beads are formed by stacking a plurality of positioning beads and are mutually attracted by the magnet pieces, when the pipe is bent, the adjacent positioning beads can mutually deviate, so that the positioning pull beads are bent along with the pipe base material. The adjacent positioning beads can be separated in the process of pulling the positioning beads outwards, so that the positioning beads can be pulled out of the pipe base material conveniently. When the pipe bending operation is carried out, the positioning pull beads play a good positioning role on the pipe fitting base material, the bending position is prevented from being greatly deformed, and the product quality is ensured.
Preferably, the positioning ball comprises a mounting seat, a connecting seat connected to the lower end of the mounting seat, a plurality of positioning heads uniformly arranged on the mounting seat, the outer wall of each positioning head is of an outward convex arc structure, a plurality of radially arranged mounting holes are formed in the mounting seat and correspond to the positioning heads, the positioning heads are movably arranged in the mounting holes, a compression spring is connected between each positioning head and the mounting seat, a pushing pin is arranged between the positioning heads in the mounting seat, a conical head is arranged on the pushing pin, the end part of each positioning head abuts against the side wall of the conical head, a mounting groove is formed in the connecting seat, a sliding hole is formed in the bottom surface of the mounting groove, a plurality of limiting rods uniformly connected to the side wall of the mounting groove are formed in the connecting seat, a reset spring is connected between each limiting rod and the connecting seat, the pushing pin is movably inserted in the corresponding sliding hole, the, the pushing pin is connected with the abutting sleeve at a position close to the conical head, the pushing pin is provided with a lifting pulling plug, the pull rope is connected with the pulling plug, and a connecting rod is hinged between the sliding rod and the pulling plug.
When the pearl is drawn in outside pulling location, the pulling stay cord of stimulateeing downwards, the pulling stopper is downstream, thereby promote the radial outwards removal of slide bar through the connecting rod, push away the gag lever post from promoting the round pin lower extreme, continue to stimulate the stay cord, will promote the outside pulling of round pin, thereby make conical head outwards remove, under compression spring's effect, the radial inwards removal of location head, thereby reduce the external diameter of whole location pearl, promote the butt cover on the round pin and butt to the connecting seat on the back, continue to stimulate the stay cord, whole location pearl will be pulled out outwards. This arrangement facilitates pulling the locating pull bead out of the tube substrate.
Preferably, a cushion pad is mounted on the lower surface of the positioning bead, and a magnet piece is mounted on the upper surface of the positioning bead. The cushion pad is convenient for positioning the pull bead to bend.
Preferably, when the pipe fitting base material is bent, the opening positions of the two ends of the pipe fitting base material are both connected with the plugs, and the buffer springs are mounted between the plugs and the end parts of the positioning pull beads. The structural arrangement ensures the stability of the positioning pull bead, and the buffer spring provides telescopic allowance for the positioning pull bead.
Compared with the prior art, the invention has the beneficial effects that: (1) the alloy protective layer is cladded on the surface of the corrosion-resistant pipe fitting of the superheater, so that the pipe fitting base material cannot be damaged, the construction efficiency is high, the batch production is convenient, and the corrosion resistance, the wear resistance and the high temperature resistance of the pipe fitting are obvious; (2) the deformation of the pipe fitting base material in the bending process is small, and the product quality is ensured.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic structural view of the elbow device of the present invention;
FIG. 3 is a schematic view of the positioning pull bead of the present invention;
FIG. 4 is a cross-sectional view of a positioning bead of the present invention;
in the figure: 1. the device comprises a bent pipe fitting, 2, a fixed wheel, 3, a movable wheel, 4, a positioning pull bead, 5, a motor, 6, an installation arm, 7, a positioning groove, 8, a positioning bead, 9, a pull rope, 10, a magnet sheet, 11, an installation seat, 12, a connection seat, 13, a positioning head, 14, a compression spring, 15, a pushing pin, 16, a conical head, 17, an installation groove, 18, a sliding hole, 19, a limiting rod, 20, a reset spring, 21, a sliding rod, 22, a butting sleeve, 23, a pulling plug, 24, a connecting rod, 25, an avoiding groove hole, 26, a lifting hole, 27, a positioning spring, 28, a positioning cover, 29, a convex ring, 30, a limiting end cover, 31, a jack, 32, a flange, 33, a butting head, 34, a cushion, 35 and a plug.
Detailed Description
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example (b): a process for manufacturing corrosion-resistant tubes for superheaters (see figure 1), comprising the following steps:
a. checking the pipe fitting base material, wherein the size and the material of the pipe fitting base material are required to be consistent with the drawing, and the pipe fitting base material is required to have no damage and sand hole defects;
b. polishing the surface of the pipe fitting base material, removing various dirt and impurities on the surface of the pipe fitting base material, and enabling the surface of the pipe fitting base material to display uniform metal luster;
c. scribing a pipe base material, namely scribing a corrosion-resistant area of the pipe base material, and reserving non-corrosion-resistant area sections at two ends of the pipe base material;
d. laser cladding, namely cladding the alloy powder to the position of an anti-corrosion area on the surface of the pipe base material in a laser cladding mode to form an alloy protective layer; the alloy powder is high-grade Ni-Cr-W alloy powder;
e. and (4) detecting, namely detecting the pipe fitting base material subjected to laser cladding, and removing unqualified pipe fitting base materials.
In the step d, the material of the pipe fitting substrate is not changed, the pipe fitting substrate and the alloy powder are combined into metallurgical bonding, the cladding thickness is not less than 1mm, and the fusion depth is 0.2 mm.
In the step e, the qualified pipe base material requires that the surface of the alloy protection layer is uniform, and good smooth transition is formed between the alloy protection layer and the non-corrosion-resistant area section.
And e, repairing the unqualified pipe fitting base material detected in the step e, detecting again after repairing, and detecting to be unqualified and not scrapped. The pipe fitting base material is changed without repair, and the transition fusion depth is not repaired.
And e, performing pipe bending operation on the qualified pipe fitting base materials to form a bent pipe fitting 1, and sequentially splicing the bent pipe fittings end to form the heater pipe fitting.
A pipe bending device (see attached figures 2 to 4) for a superheater corrosion-resistant pipe manufacturing process comprises a fixed wheel 2, a movable wheel 3 and a bendable positioning pull bead 4, wherein a mounting arm 6 driven by a motor 5 to rotate is mounted at the center of the fixed wheel, the movable wheel is rotatably mounted on the mounting arm, a circle of annular positioning grooves 7 are formed in the outer side wall of the fixed wheel and the outer side wall of the movable wheel, a pipe bending gap for mounting a pipe base material is formed between the two positioning grooves, and the positioning pull bead can be inserted into the pipe base material in an adaptive manner; the positioning pull beads comprise a plurality of positioning beads 8 which are connected together through pull ropes 9 and are attracted and stacked together through magnet sheets 10; when the pipe fitting base material is bent, the positioning pull beads are inserted into the pipe fitting base material, and two ends of the positioning pull beads extend to the opening positions of two ends of the pipe fitting base material respectively.
The positioning ball comprises a mounting seat 11, a connecting seat 12 connected to the lower end of the mounting seat, a plurality of positioning heads 13 uniformly arranged on the mounting seat, the outer walls of the positioning heads are of an outward convex arc structure, a plurality of radially arranged mounting holes are formed in the mounting seat and correspond to the positioning heads, the positioning heads are movably arranged in the mounting holes, a compression spring 14 is connected between the positioning heads and the mounting seat, a push pin 15 is arranged between the positioning heads in the mounting seat, a conical head 16 is arranged on the push pin, the end part of each positioning head is abutted against the side wall of the conical head, a mounting groove 17 is formed in the connecting seat, a sliding hole 18 arranged on the bottom surface of the mounting groove, a plurality of limiting rods 19 uniformly connected on the side wall of the mounting groove, a reset spring 20 is connected between each limiting rod and the connecting seat, the push pin is movably inserted in the sliding hole, the end part of each limiting rod, the pushing pin is connected with a butting sleeve 22 at a position close to the conical head, a lifting pulling plug 23 is arranged on the pushing pin, a pulling rope is connected with the pulling plug, and a connecting rod 24 is hinged between the sliding rod and the pulling plug. The lower end face of the pushing pin is provided with an avoiding slotted hole 25, the bottom face of the avoiding slotted hole is provided with a lifting hole 26, the pulling plug is arranged in the lifting hole, a positioning spring 27 is connected between the pulling plug and the lifting hole, the opening end of the lifting hole is connected with a positioning cover 28, the upper end of the pulling plug is provided with a convex ring 29, and the positioning spring is abutted between the convex ring and the positioning cover. The lower part of the pushing pin is provided with an annular limiting end cover 30, the limiting end cover is provided with a plurality of radial jacks 31, the jacks and the limiting rods are arranged in a one-to-one correspondence manner, and one ends of the sliding rods and one ends of the limiting rods are arranged in the jacks. The positioning head comprises an outer head and an inner head which are tightly connected together, a flange 32 is arranged on the edge of the inner head, a compression spring is abutted between the flange and the mounting seat, an abutting head 33 is arranged in the middle of the end part of the inner head, and the abutting head is abutted on the side wall of the conical head. The cushion pad 34 is mounted on the lower surface of the positioning bead and the magnet piece is mounted on the upper surface of the positioning bead. When the pipe fitting base material is bent, the opening positions at the two ends of the pipe fitting base material are both connected with the plugs 35, and the buffer springs are mounted between the plugs and the end parts of the positioning pull beads.
When the pearl is drawn in outside pulling location, the pulling stay cord of stimulateeing downwards, the pulling stopper is downstream, thereby promote the radial outwards removal of slide bar through the connecting rod, push away the gag lever post from promoting the round pin lower extreme, continue to stimulate the stay cord, will promote the outside pulling of round pin, thereby make conical head outwards remove, under compression spring's effect, the radial inwards removal of location head, thereby reduce the external diameter of whole location pearl, promote the butt cover on the round pin and butt to the connecting seat on the back, continue to stimulate the stay cord, whole location pearl will be pulled out outwards. This arrangement facilitates pulling the locating pull bead out of the tube substrate.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (10)
1. A manufacturing process of a corrosion-resistant pipe fitting of a superheater is characterized by comprising the following steps of: a. checking the pipe fitting base material, wherein the size and the material of the pipe fitting base material are required to be consistent with the drawing, and the pipe fitting base material is required to have no damage and sand hole defects; b. polishing the surface of the pipe fitting base material, removing various dirt and impurities on the surface of the pipe fitting base material, and enabling the surface of the pipe fitting base material to display uniform metal luster; c. scribing a pipe base material, namely scribing a corrosion-resistant area of the pipe base material, and reserving non-corrosion-resistant area sections at two ends of the pipe base material; d. laser cladding, namely cladding alloy powder to the position of an anti-corrosion area on the surface of the pipe base material in a laser cladding mode to form an alloy protective layer; e. and (4) detecting, namely detecting the pipe fitting base material subjected to laser cladding, and removing unqualified pipe fitting base materials.
2. The process for manufacturing the corrosion-resistant pipe fitting for the superheater according to claim 1, wherein the alloy powder is high-grade Ni-Cr-W alloy powder.
3. The process for manufacturing the corrosion-resistant superheater pipe fitting as claimed in claim 1, wherein in step e, the qualified pipe fitting substrate requires that the surface of the alloy protection layer is uniform, and a good smooth transition is formed between the alloy protection layer and the non-corrosion-resistant area section.
4. The process for manufacturing the superheater anticorrosion pipe fitting as claimed in claim 1, wherein in the step d, the material of the pipe fitting substrate is not changed, the pipe fitting substrate and the alloy powder are combined into metallurgical combination, the cladding thickness is not less than 1mm, and the fusion depth is 0.2 mm.
5. The process for manufacturing the superheater corrosion-resistant pipe fitting as claimed in claim 1, wherein the unqualified pipe fitting base material detected in the step e is repaired and then is detected again, and the unqualified pipe fitting base material is still unqualified for scrapping.
6. The process for manufacturing the superheater anticorrosion pipe fitting as claimed in any one of claims 1 to 5, wherein after the step e, the qualified pipe fitting base material is subjected to a pipe bending operation to form a bent pipe fitting, and the bent pipe fittings are sequentially spliced end to form the heater pipe fitting.
7. A pipe bending device for the superheater corrosion-resistant pipe manufacturing process according to claim 6 is characterized by comprising a fixed wheel, a movable wheel and a bendable positioning pull bead, wherein a mounting arm driven by a motor to rotate is mounted at the center of the fixed wheel, the movable wheel is rotatably mounted on the mounting arm, a ring-shaped positioning groove is formed in each of the outer side wall of the fixed wheel and the outer side wall of the movable wheel, a pipe bending gap for mounting a pipe base material is formed between the two positioning grooves, and the positioning pull bead can be inserted into the pipe base material in a matching manner; the positioning pull beads comprise a plurality of positioning beads which are connected together through pull ropes, and the positioning beads are attracted and stacked together through magnet sheets; when the pipe fitting base material is bent, the positioning pull beads are inserted into the pipe fitting base material, and two ends of the positioning pull beads extend to the opening positions of two ends of the pipe fitting base material respectively.
8. The tube bending device for the superheater anticorrosion tube manufacturing process according to claim 7, wherein the positioning bead comprises a mounting seat, a connecting seat connected to the lower end of the mounting seat, and a plurality of positioning heads uniformly installed on the mounting seat, the outer wall of the positioning head is of a convex arc structure, a plurality of radially arranged mounting holes are formed in the mounting seat and correspond to the positioning heads, the positioning heads are movably installed in the mounting holes, a compression spring is connected between the positioning heads and the mounting seat, a pushing pin is installed between the positioning heads in the mounting seat, a conical head is arranged on the pushing pin, the end part of the positioning head abuts against the side wall of the conical head, a mounting groove, a sliding hole formed in the bottom surface of the mounting groove, a plurality of limiting rods uniformly connected to the side wall of the mounting groove, a reset spring is connected between the limiting rods and the connecting seat, the pushing pin is movably inserted in the sliding, the push pin and the limiting rod are correspondingly provided with a slide rod, the end part of the slide rod is abutted against the end part of the limiting rod, the push pin is connected with an abutting sleeve at a position close to the conical head, the push pin is provided with a liftable pulling plug, the pull rope is connected onto the pulling plug, and the slide rod and the pulling plug are hinged through a connecting rod.
9. The tube bending device for the manufacture process of the corrosion-resistant tube of the superheater according to claim 7, wherein the lower surface of the positioning bead is provided with a cushion pad, and the upper surface of the positioning bead is provided with the magnet piece.
10. The tube bending device for the manufacture process of the corrosion-resistant tube of the superheater, as claimed in claim 7, wherein when the tube base material is subjected to tube bending operation, the two open ends of the tube base material are connected with the plugs, and the buffer springs are installed between the plugs and the ends of the positioning pull beads.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010407928.7A CN111644808B (en) | 2020-05-14 | 2020-05-14 | Process and device for manufacturing corrosion-resistant pipe fitting of superheater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010407928.7A CN111644808B (en) | 2020-05-14 | 2020-05-14 | Process and device for manufacturing corrosion-resistant pipe fitting of superheater |
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| CN111644808A true CN111644808A (en) | 2020-09-11 |
| CN111644808B CN111644808B (en) | 2021-06-08 |
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| JPS6455227A (en) * | 1987-08-27 | 1989-03-02 | Shinwa Ind | Bristle setting process of metallic pile |
| CN1506197A (en) * | 2002-12-10 | 2004-06-23 | 炯 陈 | Outer anticorrosion coating machine for elbow pipe |
| CN101397663A (en) * | 2008-11-11 | 2009-04-01 | 岳阳大陆激光技术有限公司 | Novel repair and reconstruction technique for defect treatment of strip coiler hollow axle |
| CN102228922A (en) * | 2011-04-20 | 2011-11-02 | 桂林电子科技大学 | Method for bending and forming metal pipe by placing steel balls inside |
| CN102465290A (en) * | 2010-11-04 | 2012-05-23 | 沈阳大陆激光技术有限公司 | Manufacturing method of double-layer metal composite pipe |
| CN103194749A (en) * | 2012-01-09 | 2013-07-10 | 沈阳大陆激光成套设备有限公司 | Method for preparing heat and wear resistant alloy coat on surface of roll gang |
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2020
- 2020-05-14 CN CN202010407928.7A patent/CN111644808B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6455227A (en) * | 1987-08-27 | 1989-03-02 | Shinwa Ind | Bristle setting process of metallic pile |
| CN1506197A (en) * | 2002-12-10 | 2004-06-23 | 炯 陈 | Outer anticorrosion coating machine for elbow pipe |
| CN101397663A (en) * | 2008-11-11 | 2009-04-01 | 岳阳大陆激光技术有限公司 | Novel repair and reconstruction technique for defect treatment of strip coiler hollow axle |
| CN102465290A (en) * | 2010-11-04 | 2012-05-23 | 沈阳大陆激光技术有限公司 | Manufacturing method of double-layer metal composite pipe |
| CN102228922A (en) * | 2011-04-20 | 2011-11-02 | 桂林电子科技大学 | Method for bending and forming metal pipe by placing steel balls inside |
| CN103194749A (en) * | 2012-01-09 | 2013-07-10 | 沈阳大陆激光成套设备有限公司 | Method for preparing heat and wear resistant alloy coat on surface of roll gang |
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