CN112856477A - Water-cooled wall internal thread tube panel and processing method thereof - Google Patents
Water-cooled wall internal thread tube panel and processing method thereof Download PDFInfo
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- CN112856477A CN112856477A CN202110060379.5A CN202110060379A CN112856477A CN 112856477 A CN112856477 A CN 112856477A CN 202110060379 A CN202110060379 A CN 202110060379A CN 112856477 A CN112856477 A CN 112856477A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
本发明涉及一种水冷壁内螺纹管屏及其加工方法，属于锅炉水冷壁技术领域。为解决现有的内螺纹管屏的螺纹易产生应力集中、内螺纹管与扁钢间热应力过大导致而管屏爆管失效的问题，本发明提供了一种水冷壁内螺纹管屏及其加工方法，水冷壁内螺纹管屏由内螺纹管与扁钢焊接而成，内螺纹截面为内凹曲面梯形，内螺纹管两侧分别加工有弧形坡口，扁钢通过弧形坡口与内螺纹管焊接，扁钢加工有蜂窝状芯部。加工方法为：对内螺纹进行螺纹增材制造、在内螺纹管两侧采用增材制造的方式加工出弧形坡口并利用铣刀对两侧弧形坡口进行减材加工、采用增材制造方式加工扁钢、对扁钢与内螺纹管进行焊接。本发明可减少内螺纹管屏内部应力集中现象，提高其使用寿命。
The invention relates to a water-cooled wall inner thread tube panel and a processing method thereof, belonging to the technical field of boiler water-cooled walls. In order to solve the problem that the thread of the existing internal threaded pipe panel is prone to stress concentration, the thermal stress between the internal threaded pipe and the flat steel is too large, and the pipe panel bursts and fails, the present invention provides a water-cooled wall internally threaded pipe panel and The processing method is as follows: the water-cooled wall inner threaded pipe screen is welded by the inner threaded pipe and the flat steel, the inner thread section is a concave curved trapezoid, the two sides of the inner threaded pipe are respectively processed with arc-shaped grooves, and the flat steel passes through the arc-shaped grooves. Welded with internally threaded pipe, flat steel is machined with a honeycomb core. The processing method is as follows: thread additive manufacturing is performed on the internal thread, an arc-shaped groove is processed by additive manufacturing on both sides of the internal threaded pipe, and a milling cutter is used to perform subtractive processing on the arc-shaped groove on both sides, and additive manufacturing is used. The manufacturing method processes flat steel, and welds flat steel and internally threaded pipe. The invention can reduce the stress concentration phenomenon inside the inner thread tube panel and improve its service life.
Description
Technical Field
The invention belongs to the technical field of boiler water-cooled walls, and particularly relates to a water-cooled wall internal thread tube panel and a processing method thereof.
Background
The conventional boiler water wall internal thread tube panel is formed by welding and connecting an internal thread tube and a flat steel, and the welding mode is longitudinal seam welding of the flat steel with a groove and the outer wall of the thread tube.
The internal thread tube panel manufactured by the traditional method structurally has the following problems:
1. the thread cross-section of traditional internal thread pipe is trapezoidal, and apex angle and root are the closed angle form, and at boiler operation in-process, the closed angle form of apex angle and root receives thermal stress and residual stress effect, very easily produces the inner wall screw thread that stress concentration leads to and loses efficacy, finally takes place the pipe panel and explodes the pipe accident.
2. Traditional band steel is solid metal material, and simultaneously, solid metal's weight is great, makes the whole weight increase of heating surface, leads to the increase of suspension pipe quantity on furnace upper portion to lead to boiler gross weight to increase from this, and the cost promotes. And the heat transfer efficiency of the traditional solid metal flat steel is extremely high, so that the heat generated by burning the pulverized coal in the hearth is dissipated outside the hearth through the heat transfer of the flat steel, and limited steam cannot be generated through a water working medium in the pipe, so that the heat is greatly wasted. The heat conduction rate of the metal flat steel is high, in the operation process, the flat steel is in a dry burning state without working medium heat exchange, and heat is transferred to the pipe wall from the flat steel, so that the temperature of the joint of the flat steel and the pipe is high, and the temperature of the non-joint is low due to the working medium heat exchange effect, so that large thermal stress is generated in the circumferential direction of the pipe.
And also has the following problems during processing:
the traditional pipe and flat steel welding mode is that the flat steel with the groove and the curved surface of the outer wall of the pipe without the groove are welded, the thickness of the flat steel at the root of the welding line is thinned after the groove is machined on the side of the flat steel, the flat steel welding line is torn easily in the operation process of a boiler, and finally, the crack is expanded to the pipe body, so that the failure accident of pipe explosion of the pipe panel is caused.
Disclosure of Invention
In order to solve the problems that stress concentration is easily generated on the threads of the conventional internal thread tube panel, and tube panel tube explosion is ineffective due to overlarge thermal stress between an internal thread tube and flat steel, the invention provides a water-cooled wall internal thread tube panel.
The technical scheme of the invention is as follows:
the utility model provides a water-cooled wall internal thread tube panel, includes internal thread pipe and band steel, per two connect through the band steel between the internal thread intertube, form one side water-cooled wall internal thread tube panel, the internal thread cross-section of internal thread pipe is that the indent curved surface is trapezoidal, and its root is the circular arc transition, and its apex angle is the circular arc sword form, the outer wall both sides of internal thread pipe are processed respectively and are had the arc groove, the band steel passes through the arc groove and is connected with the internal thread pipe, the band steel processing has cellular core.
Preferably, the arc groove is a root arc transition groove.
In order to solve the problem that the internal thread tube panel processed by the existing processing method is prone to cracking and failure in the operation process, the invention provides a processing method of the internal thread tube panel of the water-cooled wall.
A processing method of a water-cooled wall internal thread tube panel comprises the following steps:
step one, using an additive manufacturing mode to perform thread additive manufacturing on internal threads of an internal thread pipe;
step two, processing arc-shaped grooves on two sides of the outer wall of the internally threaded pipe in an additive manufacturing mode, and reducing the material of the arc-shaped grooves on the two sides by using a milling cutter;
step three, processing the flat steel with the honeycomb core part in an additive manufacturing mode;
and step four, welding the flat steel and the arc-shaped groove of the internal threaded pipe.
Preferably, the first step is specifically: and (3) performing thread additive manufacturing on the internal thread of the internal thread pipe by using tungsten-containing wear-resistant and scouring-resistant Stellite6 powder.
Preferably, the additive manufacturing manner in the second step is double-sided laser additive manufacturing.
Preferably, the material reducing manufacturing method in the second step is grinding and polishing material reducing processing.
Preferably, the second step is specifically: the method is characterized in that double-side rotatable and telescopic material-increasing and material-reducing coupled mechanical arms are adopted, the flat steel on the two sides of the pipe is symmetrically subjected to material-increasing manufacturing through rotary powder-feeding type laser heads on the two sides, and after the telescopic mechanical arms on the two sides are rotated for 180 degrees, a rotary material-shearing tool is adopted to carry out grinding, polishing and material-reducing processing on grooves on the two sides.
The invention has the beneficial effects that:
1. the cross section of an internal thread of the water-cooled wall internal thread tube panel is in a concave curved surface trapezoid shape, the root of the internal thread is in arc transition, the vertex angle of the internal thread is in an arc blade shape, and stress concentration is eliminated through curved surface transition. The stress concentration of the root part and the vertex angle of the thread is greatly reduced, meanwhile, a fluid channel for cutting film boiling is increased through the arc blade, and the quantity of powder used for material increase of the internal thread is reduced through the concave curved surface so as to reduce the manufacturing cost. According to the scheme of the invention, the service lives of the internal thread tube panel and the flat steel are prolonged, the weight of the hearth can be greatly reduced, the thermal stress of the tube panel is reduced, the heat exchange efficiency of the boiler is increased, and more hot water-rich working media are generated. Has multiple purposes.
2. According to the invention, a bilateral additive manufacturing mode is adopted for two sides of a pipe, the stress-eliminating arc groove appearance is processed, the curved surface welding of the flat steel and the pipe is converted into butt welding between grooves, and the root tip angle of the flat steel is replaced by thickened arc transition, so that the strength of the root of the flat steel is greatly enhanced, and the stress concentration and tearing risk of the root are reduced; the flat steel adopts the honeycomb shape of the core part made by additive manufacturing, so that the weight of the flat steel and the top suspension quantity are greatly reduced, and meanwhile, the low-speed water working medium is introduced into the honeycomb flat steel core part through the low-parameter header, so that the heat exchange efficiency of the hearth is greatly increased, more hot water working medium is generated, and the heat loss of the hearth through the solid metal flat steel is reduced. Simultaneously, this mode can greatly reduced the risk that the thermal stress that the huge difference in temperature of band steel and pipe produced leads to the tube panel to become invalid.
3. According to the invention, the double-side rotatable and telescopic material-increasing and material-reducing coupling mechanical arm is adopted, the flat steel on the two sides of the pipe is subjected to symmetrical material-increasing manufacturing through double-side laser material-increasing, after the pipe is rotated by 180 degrees, the double-end milling cutter is adopted to carry out grinding, polishing and material-reducing processing on grooves on the two sides, and the arm is loaded on the industrial robot. Greatly increasing the production efficiency and the symmetry of the tube panel product.
Drawings
FIG. 1 is a schematic structural view of an internally threaded tube and a flat steel;
FIG. 2 is a partial schematic view of the internal thread of an internally threaded tube;
FIG. 3 is a schematic structural diagram of a dual-side rotatable and retractable material-adding and material-reducing coupled robot arm;
FIG. 4 is a macroscopic view (30 times magnification) of the internal thread of the water-cooled wall internal thread tube panel obtained in the first embodiment;
FIG. 5 is an SEM image (500 μm) of the inner screw wall of the water-wall internally-threaded tube panel obtained in the first embodiment;
FIG. 6 is a schematic thread profile of a thread cross-section of an internally threaded tube panel of a water wall according to an embodiment;
FIG. 7 is a schematic structural view of an internally threaded tube and a flat bar obtained in the first comparative example;
FIG. 8 is a partial schematic view of the internal thread of an internally threaded tube obtained in the comparative example;
FIG. 9 is a macroscopic view (30 times magnification by a stereomicroscope) of the internal thread of the water-cooled wall internal thread tube panel obtained in the first comparative example;
FIG. 10 is an SEM image (500 μm) of the internally threaded wall of the internally threaded tube panel of the water-cooled wall obtained in comparative example one;
FIG. 11 is a schematic view of the original profile of the thread of the comparative example;
FIG. 12 is a schematic diagram of a thread scour thinning failure profile of the first comparative example;
FIG. 13 is a cloud of thermal stress distributions of the solid flat steel water wall tube panels of the comparative example I;
in the figure: 1. an internally threaded tube; 1-1, internal threads; 1-2, arc groove; 2. flat steel; 2-1, honeycomb core; 3. the two sides can rotate and the material can be telescopically increased and decreased by the coupling mechanical arm; 3-1, a telescopic mechanical arm, 3-2 and a rotary material shearing tool; 3-3, and a rotary powder feeding type laser head.
Detailed Description
The technical solutions of the present invention are further described below with reference to the following examples, but the present invention is not limited thereto, and any modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Example one
The utility model provides a water-cooled wall internal thread tube panel, includes internal thread pipe 1 and band steel 2, per two internal thread pipe 1 is connected through band steel 2 within a definite time, forms one side water-cooled wall internal thread tube panel, internal thread 1-1 cross-section of internal thread pipe 1 is indent curved surface trapezoidal, and its root is the circular arc transition, and its apex angle is the circular arc sword form, the groove arc groove 1-2 that has root circular arc transition is processed respectively to the outer wall both sides of internal thread pipe 1, band steel 2 is connected with internal thread pipe 1 through arc groove 1-2, band steel 2 processing has cellular core 2-1, and its structural schematic is as shown in figure 1, figure 2.
The processing method comprises the following specific steps:
step one, adopting tungsten-containing wear-resistant and scouring-resistant Stellite6 powder to perform thread additive manufacturing on an internal thread 1-1 of an internal thread pipe 1;
step two, adopting a double-side rotatable and telescopic material-increasing and material-reducing coupling mechanical arm 3, symmetrically performing material-increasing processing on the flat steel 2 at two sides of the pipe to form an arc groove 1-2 through rotary powder-feeding type laser heads 3-3 at two sides, and performing material-reducing processing on the arc groove 1-2 by adopting a rotary material-shearing cutter 3-2 after rotating the telescopic mechanical arms 3-1 at two sides for 180 degrees;
thirdly, processing the flat steel 2 with the honeycomb-shaped core part 2-1 in an additive manufacturing mode;
and step four, welding the flat steel 2 and the arc-shaped groove 1-2 of the internal threaded pipe 1.
The surface appearance of the inner thread wall of the obtained water-cooled wall internal thread tube panel is observed by an electronic scanning electron microscope, the observation results are shown in fig. 4 and fig. 5, only a small amount of unobvious cross striations and crack failure appearance of the thread surface can be observed from the figures, and at the moment, most of the cross striations and cracks appear because the material of the internal thread tube wall of the original matrix is generated and is inevitably caused by the fact that the tube wall is expanded to the internal thread.
The thread appearance of the thread section of the obtained water wall internal thread tube panel is observed through an optical microscope, the observation result is shown in figure 6, and the thread can be observed to almost keep the original appearance without deformation and cracking.
In conclusion, the water-cooled wall internal thread tube panel obtained by the processing method of the embodiment is not easy to deform and crack.
The embodiment can achieve the following beneficial effects:
1. two sides of the internal thread pipe 1 are manufactured in a bilateral additive manufacturing mode to process stress-eliminating arc grooves 1-2, so that the curved surface welding of the flat steel 2 and the internal thread pipe 1 is changed into butt welding between the grooves, and the root sharp angle of the flat steel is replaced by thickening arc transition, so that the root strength of the flat steel is greatly enhanced, and the root stress concentration and tearing risk are reduced.
2. The flat steel 2 adopts the honeycomb shape of the core part made by additive manufacturing, so that the weight and the top suspension quantity of the flat steel 2 are greatly reduced, and meanwhile, the low-speed water working medium is introduced into the honeycomb flat steel 2 core part through the low-parameter header, so that the heat exchange efficiency of the hearth is greatly increased, more hot water working medium is generated, and the loss of the heat of the hearth through the solid metal flat steel 2 is reduced. Simultaneously, this mode can greatly reduced band steel 2 and the risk that the thermal stress that the huge difference in temperature of internal thread pipe 1 produced leads to the tube panel inefficacy.
3. The method is characterized in that the inner wall of a 15CrMoG rotary pipe is subjected to screw thread additive manufacturing by using an additive manufacturing mode, tungsten-containing wear-resistant and scouring-resistant stellite6 powder is adopted, the section of an internal thread 1-1 is a concave curved trapezoid, the vertex angle is in a circular arc blade shape, and stress concentration is eliminated through curved surface transition. The stress concentration of the root part and the vertex angle of the thread is greatly reduced, meanwhile, a fluid channel for cutting film boiling is increased through the arc blade, and the quantity of powder used for material increase of the internal thread is reduced through the concave curved surface so as to reduce the manufacturing cost.
4. The double-side rotatable and telescopic material increasing and decreasing coupling mechanical arm 3 is adopted to symmetrically manufacture the material increasing and decreasing of the flat steel 2 on the two sides of the pipe through the double-side laser material increasing, and after the double-end milling cutter is rotated for 180 degrees, the double-end milling cutter is adopted to carry out grinding, polishing and material decreasing processing on grooves on the two sides. The 4 arms are all rotatable and retractable, and the arms are loaded on the industrial robot. The production efficiency and the symmetry of the tube panel product are greatly increased, and the structural schematic diagram of the bilateral rotatable and telescopic material adding and reducing coupling mechanical arm 3 is shown in fig. 3.
5. According to the scheme, the service life of the internal thread tube panel and the service life of the flat steel are prolonged, the weight of the hearth can be greatly reduced, the thermal stress of the tube panel is reduced, the heat exchange efficiency of the boiler is increased, and more hot water-rich working media are generated. Has multiple purposes.
Example two
The utility model provides a water-cooled wall internal thread tube panel, includes internal thread pipe 1 and band steel 2, per two internal thread pipe 1 is connected through band steel 2 within a definite time, forms one side water-cooled wall internal thread tube panel, internal thread 1-1 cross-section of internal thread pipe 1 is indent curved surface trapezoidal, and its root is the circular arc transition, and its apex angle is the circular arc sword form, the groove arc groove 1-2 that has root circular arc transition is processed respectively to the outer wall both sides of internal thread pipe 1, band steel 2 is connected with internal thread pipe 1 through arc groove 1-2, band steel 2 processing has cellular core 2-1, and its structural schematic is as shown in figure 1, figure 2.
The processing method comprises the following specific steps:
step one, adopting tungsten-containing wear-resistant and scouring-resistant Stellite6 powder to perform thread additive manufacturing on an internal thread 1-1 of an internal thread pipe 1;
step two, adopting a double-side rotatable and telescopic material-increasing and material-reducing coupling mechanical arm 3, symmetrically performing material-increasing processing on the flat steel 2 at two sides of the pipe to form an arc groove 1-2 through rotary powder-feeding type laser heads 3-3 at two sides, and performing material-reducing processing on the arc groove 1-2 by adopting a rotary material-shearing cutter 3-2 after rotating the telescopic mechanical arms 3-1 at two sides for 180 degrees;
thirdly, processing the flat steel 2 with the honeycomb-shaped core part 2-1 in an additive manufacturing mode;
and step four, welding the flat steel 2 and the arc-shaped groove 1-2 of the internal threaded pipe 1.
The embodiment can achieve the following beneficial effects:
1. two sides of the internal thread pipe 1 are manufactured in a bilateral additive manufacturing mode to process stress-eliminating arc grooves 1-2, so that the curved surface welding of the flat steel 2 and the internal thread pipe 1 is changed into butt welding between the grooves, and the root sharp angle of the flat steel is replaced by thickening arc transition, so that the root strength of the flat steel is greatly enhanced, and the root stress concentration and tearing risk are reduced.
2. The flat steel 2 adopts the honeycomb shape of the core part made by additive manufacturing, so that the weight and the top suspension quantity of the flat steel 2 are greatly reduced, and meanwhile, the low-speed water working medium is introduced into the honeycomb flat steel 2 core part through the low-parameter header, so that the heat exchange efficiency of the hearth is greatly increased, more hot water working medium is generated, and the loss of the heat of the hearth through the solid metal flat steel 2 is reduced. Simultaneously, this mode can greatly reduced band steel 2 and the risk that the thermal stress that the huge difference in temperature of internal thread pipe 1 produced leads to the tube panel inefficacy.
3. The method is characterized in that the inner wall of a 15CrMoG rotary pipe is subjected to screw thread additive manufacturing by using an additive manufacturing mode, tungsten-containing wear-resistant and scouring-resistant stellite6 powder is adopted, the section of an internal thread 1-1 is a concave curved trapezoid, the vertex angle is in a circular arc blade shape, and stress concentration is eliminated through curved surface transition. The stress concentration of the root part and the vertex angle of the thread is greatly reduced, meanwhile, a fluid channel for cutting film boiling is increased through the arc blade, and the quantity of powder used for material increase of the internal thread is reduced through the concave curved surface so as to reduce the manufacturing cost.
4. According to the scheme, the service life of the internal thread tube panel and the service life of the flat steel are prolonged, the weight of the hearth can be greatly reduced, the thermal stress of the tube panel is reduced, the heat exchange efficiency of the boiler is increased, and more hot water-rich working media are generated. Has multiple purposes.
Comparative example 1
The conventional boiler water wall internal thread tube panel is formed by welding and connecting an internal thread tube and a flat steel, the welding mode is that the flat steel with a groove and the outer wall of the thread tube are welded by longitudinal seams, as shown in fig. 7, the section of an internal thread of the internal thread tube is trapezoidal, as shown in fig. 8.
The traditional mode manufactured internal thread tube panel has the following problems:
1. traditional internal thread pipe adopts the rotation of internal thread plug to draw and forms, and the screw thread cross-section is trapezoidal, and apex angle and root are the closed angle form. The drawing forming enables the inside of the thread to have large residual stress, and meanwhile, in the operation process of the boiler, the sharp corners of the top corners and the roots are under the action of thermal stress and residual stress, so that the inner wall thread failure caused by stress concentration is easy to generate, and as shown in fig. 9 and 10, the tube panel tube explosion accident finally occurs.
2. Traditional internal thread pipe draws production for behind the plug perforation, and screw thread and pipe wall inevitable be same material, but in boiler operation in-process, the internal thread continuously receives the scouring action of water working medium. After long-term operation, the thread is thinned and deformed to lose efficacy, the vertex angle is ground into a circular arc, the effect of preventing the inner wall from film boiling cannot be achieved, and finally the tube is easy to overheat and lose efficacy. The thread original profile is shown in fig. 11 and the failure profile after flushing is shown in fig. 12.
The general problem of this traditional mode manufacturing water-cooled wall tube panel exists:
1. the traditional pipe and flat steel welding mode is that the flat steel with the groove and the curved surface of the outer wall of the pipe without the groove are welded, the thickness of the flat steel at the root of the welding line is thinned after the groove is machined on the side of the flat steel, the flat steel welding line is torn easily in the operation process of a boiler, and finally, the crack is expanded to the pipe body, so that the failure accident of pipe explosion of the pipe panel is caused.
2. Traditional band steel is solid metal material, and simultaneously, solid metal's weight is great, makes the whole weight increase of heating surface, leads to the increase of suspension pipe quantity on furnace upper portion to lead to boiler gross weight to increase from this, and the cost promotes.
3. The traditional solid metal flat steel has extremely high heat transfer efficiency, so that heat generated by burning the pulverized coal in the hearth is dissipated outside the hearth through the flat steel heat transfer, limited steam cannot be generated through a water working medium in a pipe, and the heat is greatly wasted.
4. The heat conduction rate of the metal flat steel is high, in the operation process, the flat steel is in a dry burning state without working medium heat exchange, and heat is transferred to the pipe wall from the flat steel, so that the temperature of the joint of the flat steel and the pipe is high, but the temperature of the non-joint is low due to the working medium heat exchange action, so that large heat stress is generated in the circumferential direction of the pipe, and a heat distribution cloud chart is shown in fig. 13.
As can be observed by comparing fig. 9 with fig. 4 and comparing fig. 10 with fig. 5, compared with the water-cooled wall internal thread tube panel obtained by the existing processing method, the water-cooled wall internal thread tube panel obtained by the processing method of the present invention has the advantages that the cross striations and the cracks generated on the thread surface are significantly reduced, the 3D printed threads can significantly resist water flow impact and failure deformation, and the crack failure morphology is significantly reduced; comparing fig. 12 with fig. 7, it can be observed that the water-cooled wall internal thread tube panel obtained by the processing method of the present invention has a thread cross section which almost maintains the original thread appearance and has no deformation and cracks compared with the water-cooled wall internal thread tube panel obtained by the existing processing method. In conclusion, compared with the water-cooled wall internal thread tube panel obtained by the conventional processing method, the water-cooled wall internal thread tube panel obtained by the processing method reduces the conditions of stress concentration and thread failure.
Claims (7)
1. The utility model provides a water-cooling wall internal thread tube panel, includes internal thread pipe (1) and band steel (2), per two connect through band steel (2) between internal thread pipe (1), form one side water-cooling wall internal thread tube panel, its characterized in that, the internal thread (1-1) cross-section of internal thread pipe (1) is indent curved surface trapezoidal, and its root is the circular arc transition, and its apex angle is the circular arc sword form, arc groove (1-2) have been processed respectively to the outer wall both sides of internal thread pipe (1), band steel (2) are connected with internal thread pipe (1) through arc groove (1-2), band steel (2) processing has cellular core (2-1).
2. The inner threaded tube panel of the water wall according to claim 1, wherein the arc-shaped groove (1-2) is a root arc transition groove.
3. A processing method of the water-cooled wall internal thread tube panel is characterized by comprising the following steps:
step one, using an additive manufacturing mode to perform thread additive manufacturing on internal threads (1-1) of an internal thread pipe (1);
step two, machining arc-shaped grooves (1-2) on two sides of the outer wall of the internally threaded pipe (1) in an additive manufacturing mode, and performing material reduction machining on the arc-shaped grooves (1-2) on the two sides by using a milling cutter;
step three, processing the flat steel (2) with the honeycomb core part (2-1) in an additive manufacturing mode;
and fourthly, welding the flat steel (2) and the arc-shaped groove (1-2) of the internal threaded pipe (1).
4. The processing method of the water-cooled wall internal thread tube panel according to claim 3, characterized in that the first step is specifically as follows: and (3) performing thread additive manufacturing on the internal thread (1-1) of the internal thread pipe (1) by using tungsten-containing wear-resistant and scouring-resistant Stellite6 powder.
5. The processing method of the water-cooled wall internal thread tube panel according to claim 4, characterized in that the additive manufacturing manner in the second step is double-sided laser additive manufacturing.
6. The processing method of the water-cooled wall internal thread tube panel according to claim 5, characterized in that the material reducing manufacturing mode in the second step is grinding and polishing material reducing processing.
7. The processing method of the water-cooled wall internal thread tube panel according to claim 5, characterized in that the second step is specifically: the material adding and reducing method is characterized in that double-side rotatable and telescopic material adding and reducing coupling mechanical arms (3) are adopted, symmetrical material adding and manufacturing are carried out on flat steel (2) on two sides of a pipe through rotary powder feeding type laser heads (3-3) on the two sides, and after the telescopic mechanical arms (3-1) on the two sides are rotated for 180 degrees, grinding, polishing and material reducing processing are carried out on grooves on the two sides through rotary material shearing cutters (3-2).
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