CN108906942B - Process for manufacturing pressed part in coal-fired organic heat carrier heating furnace - Google Patents
Process for manufacturing pressed part in coal-fired organic heat carrier heating furnace Download PDFInfo
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- CN108906942B CN108906942B CN201810877333.0A CN201810877333A CN108906942B CN 108906942 B CN108906942 B CN 108906942B CN 201810877333 A CN201810877333 A CN 201810877333A CN 108906942 B CN108906942 B CN 108906942B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0275—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using solid fuel
- F24H7/0291—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using solid fuel the transfer fluid being water
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Abstract
The invention discloses a manufacturing process of a pressed part in a coal-fired organic heat carrier heating furnace, which comprises the step S1S1 includes the manufacture of the radiant coil in the radiant section group and the manufacture of the convection coil in the convection section group; the method for determining the bending parameters of the bending part in the manufacturing of the radiant section coil pipe comprises the following steps: selecting proper pipe diameter DoThe first tube is subjected to trial bending and trial production by gradually increasing the bending radius R of the first tube and reducing the wall thickness of the first tube, and the minimum bending radius R and the minimum wall thickness which meet the formula and meet the requirements of the bending process are selected as bending parameters of a bending part in the manufacturing of the radiation section coil pipe after the trial bending is finished; wherein, the first formula is:
the invention can avoid the phenomenon that the pipe wall is shriveled when the bending part is bent in the manufacturing process of the radiation section coil pipe, and weak links are generated, so that the quality of a product in the using process can not be ensured, and the quality of a pressed part is improved.
Description
Technical Field
The invention relates to a manufacturing process of a pressed part in a coal-fired organic heat carrier heating furnace.
Background
At present, a coal-fired organic heat carrier furnace takes coal as a main fuel, adopts an indirect heating mode to transfer heat generated by fuel combustion to an organic heat carrier, utilizes a circulating pump to forcibly carry out liquid phase circulation on the organic heat carrier, conveys heat energy to heat utilization equipment, and then returns to a special industrial furnace for reheating and using. The earliest heating furnace production has no standard manufacturing sequence and the production equipment is also crude, so the production efficiency is low and the product quality can not be well ensured.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a manufacturing process of a pressed part in a coal-fired organic heat carrier heating furnace, which can avoid the phenomenon that the pipe wall is shriveled when a bending part is bent in the manufacturing process of a radiation section coil pipe, so that weak links can not ensure the quality of a product in the using process, and improve the quality of the pressed part.
In order to solve the technical problems, the technical scheme of the invention is as follows: a manufacturing process of a pressed part in a coal-fired organic heat carrier heating furnace comprises the steps of S1, wherein the step S1 comprises the manufacture of a radiant section coil pipe in a radiant section group and the manufacture of a convection coil pipe in a convection section group; the method for determining the bending parameters of the bending part in the manufacturing of the radiant section coil pipe comprises the following steps:
selecting proper pipe diameter DoThe first tube is subjected to trial bending and trial production by gradually increasing the bending radius R of the first tube and reducing the wall thickness of the first tube, and the minimum bending radius R and the minimum wall thickness which meet the formula and meet the requirements of the bending process are selected as bending parameters of a bending part in the manufacturing of the radiation section coil pipe after the trial bending is finished; wherein, the first formula is:
Further, when DoWhen 76, the minimum bending radius R is 279, and the minimum wall thickness is 4;
when D is presento89, the minimum bending radius R is 383, and the minimum wall thickness is 4;
when D is presentoWhen the minimum bending radius is 108, the minimum bending radius R is 500, and the minimum wall thickness is 4.5;
when D is presentoWhen the minimum bending radius is 114.3, the minimum bending radius R is 505, and the minimum wall thickness is 5;
when D is presento133, the minimum bend radius R is 683, and the maximum bend radius R isThe small wall thickness is 5;
when D is presento159 f, the minimum bend radius R is 977 and the minimum wall thickness is 5.
Further, the phenomenon that the overall structure is overlarge due to overlarge bending radius in the bending process of the convection coil is avoided, and the convection coil is ensured to meet the requirements of a bending process, wherein the method for determining the bending parameters of the bending part in the manufacturing process of the convection coil comprises the following steps:
selecting proper pipe diameter DoThe second tube is subjected to trial bending and trial production by gradually reducing the bending radius R ' of the second tube and selecting a proper wall thickness ' of the second tube, and the minimum bending radius R ' meeting the second formula and meeting the bending process requirement is selected as the bending parameter of the bending part in the manufacture of the convection coil after the trial bending is finished; wherein, the formula two is:
the minimum bend radius R' is an integer; do', ' and R ' are in mm.
Further, when Do38, minimum bend radius R 'is 61, minimum wall thickness' is 3;
when D is presento(vii) a minimum bend radius R 'of 86, a minimum wall thickness' of 3, when 45;
when D is presento(iii) 51, minimum bend radius R '110, minimum wall thickness' 3;
when D is presento57, minimum bend radius R '138, minimum wall thickness' 3;
when D is presento76, the minimum bending radius R 'is 184, and the minimum wall thickness' is 4;
when D is presento(iii) 89, minimum bend radius R '252, minimum wall thickness' 4;
when D is presento108, minimum bend radius R '370, minimum wall thickness' 4;
when D is presento133, the minimum bend radius R 'is 562 and the minimum wall thickness' is 4.
Further, the process steps comprise:
s1: respectively manufacturing a radiant tube section group, a ceiling tube group, a convection section tube group, an inlet header, an outlet header, a convection section header A and a convection section header B;
s2: the inlet collecting pipe is connected with the inlet of the convection section collecting pipe A, the outlet of the convection section collecting pipe A is connected with the inlet of the convection section pipe group, the outlet of the convection section pipe group is connected with the inlet of the convection section collecting pipe B, the outlet of the convection section collecting pipe B is connected with the inlet of the radiation pipe group, the outlet of the radiation pipe group is connected with the inlet of the ceiling pipe group, and the outlet of the ceiling pipe group is connected with the outlet collecting pipe.
Further, a front header and a rear header are also produced in step S1; in step S2, the front header is also connected to the inlet of the ceiling tube group, the outlet of the radiant tube section group is connected to the front header, the rear header is also connected to the outlet of the ceiling tube group, and the rear header is further connected to the outlet header.
Furthermore, the outlet of the radiant tube section group is connected with the front collecting tube through the intermediate-frequency three-dimensional bent tube group.
Further, the rear header is connected to the outlet header by a transition joint group.
After the technical scheme is adopted, the bending parameters of the bending part in the manufacturing process of the radiant section coil pipe are determined through multiple times of bending tests and test production, the bending parameters comprise the bending radius R and the wall thickness of the pipe, and the minimum bending radius and the minimum wall thickness are determined, so that the pipe wall of the bending part of the radiant section coil pipe cannot be shrunk in the bending process, and the phenomenon that the quality of a product cannot be guaranteed in the using process due to weak links is generated; in addition, the invention also determines the minimum bending radius R 'and the proper wall thickness' of the bending part in the manufacture of the convection coil through multiple trial bending and trial production, so that the minimum bending radius is adopted while the requirement of the bending process is met, and the phenomenon of overlarge integral structure is avoided.
Drawings
FIG. 1 is a view of the arrangement of the detection points of the bending section in the fabrication of the radiant section coil of the present invention;
FIG. 2 is a view showing the arrangement of detecting points in a bent portion in the production of a convection coil according to the present invention;
FIG. 3 is a schematic structural view of a pressure receiving member according to the present invention;
fig. 4 is a sectional view a-a of fig. 3.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1 to 4, a process for manufacturing a pressed part in a coal-fired organic heat carrier heating furnace comprises the steps of S1, wherein the step S1 comprises the manufacture of a radiant section coil in a radiant section group 1 and the manufacture of a convection coil in a convection section group 2; the method for determining the bending parameters of the bending part in the manufacturing of the radiant section coil pipe comprises the following steps:
selecting proper pipe diameter DoThe first tube 10 is subjected to trial bending and trial production by gradually increasing the bending radius R of the first tube 10 and reducing the wall thickness of the first tube 10, and after the trial bending is finished, the minimum bending radius R and the minimum wall thickness which meet the formula and meet the requirements of the bending process are selected as bending parameters of a bending part in the manufacturing of the radiation section coil; wherein, the first formula is:
When D is presentoWhen 76, the minimum bending radius R is 279, and the minimum wall thickness is 4;
when D is presento89, the minimum bending radius R is 383, and the minimum wall thickness is 4;
when D is presentoWhen the minimum bending radius is 108, the minimum bending radius R is 500, and the minimum wall thickness is 4.5;
when D is presentoWhen the minimum bending radius is 114.3, the minimum bending radius R is 505, and the minimum wall thickness is 5;
when D is presento133, minimum bend radius R683, minimum wall thickness 5;
when D is presento159 f, the minimum bend radius R is 977 and the minimum wall thickness is 5.
In the field of heating furnaces, the bending process requirements of the tubes are national standard regulations known to those skilled in the art, specifically GB/T16507.5-2013 "Hot Water boiler" appendix A, and are to meet the 6.4.2.4 requirements.
In this example, a cold bending process test of a square coiled pipe was performed using a first pipe 10 of phi 108 × 4.5, where the bending radius R was 500mm, the bending angle was 90 °, as shown in fig. 1,
the thicknesses a (mm) of the outer side walls of the elbow are respectively A1(4.3), B1(4.4), C1(4.2) and D1(4.3)
The thicknesses i (mm) of the inner side walls of the elbow are respectively A2(4.5), B2(4.4), C2(4.5) and D2(4.6)
Roundness: when R/D is 0 degree, 2.2%, 30 degree, 2.3%, 60 degree, 2.3%, 90 degree, 2.1%. When the roundness is more than or equal to 2.5 percent, the roundness is less than or equal to 10 percent
Wall thickness of straight section: 4.5mm
And (4) qualified standard:
and (4) conclusion: the bending process test of the square coil pipe is carried out according to the requirements of GB/T16507.5-2013 'annex A of Hot Water boiler', the surface, the external dimension and the like of 1 bent pipe are detected to meet the requirements of 6.4.2.4, the bending process test verification is carried out on the pipe with phi 108 multiplied by 4.5 under the condition that the bending radius R is 500, and therefore the effective range of the bending forming of the first pipe 10 can be obtained,
any other parameter combinations T that can be covered in a given homogeneous group and elbow processFR110% of (i.e. T)FRLess than or equal to 5.69, and meets the design requirements.
The method for determining the bending parameters of the bending part in the manufacturing of the convection coil comprises the following steps:
selecting proper pipe diameter Do'tube number two 20, by progressively reducing the bend radius R' of tube number two 20 and selecting the appropriate wall thickness for tube number two 20The method carries out trial bending and trial production on the second tube 20, and selects the minimum bending radius R' which meets the second formula and meets the requirements of the bending process as the bending parameter of the bending part in the manufacture of the convection coil after the trial bending is finished; wherein, the formula two is:
When D is presento38, minimum bend radius R 'is 61, minimum wall thickness' is 3;
when D is presento(vii) a minimum bend radius R 'of 86, a minimum wall thickness' of 3, when 45;
when D is presento(iii) 51, minimum bend radius R '110, minimum wall thickness' 3;
when D is presento57, minimum bend radius R '138, minimum wall thickness' 3;
when D is presento76, the minimum bending radius R 'is 184, and the minimum wall thickness' is 4;
when D is presento(iii) 89, minimum bend radius R '252, minimum wall thickness' 4;
when D is presento108, minimum bend radius R '370, minimum wall thickness' 4;
when D is presento133, the minimum bend radius R 'is 562 and the minimum wall thickness' is 4.
In the embodiment, a second pipe 20 with phi 51 multiplied by 3 is adopted to carry out a coil pipe bending cold bending process test, the bending radius R is 110mm, the bending angle is 180 degrees, the number of bent pipes is 5, a steel ball is introduced after the bent pipes are bent to the test angle, the diameter phi of the steel ball is more than or equal to 35.8mm, and the steel ball is qualified when the steel ball passes smoothly.
As shown in fig. 2, the data were measured as follows:
the thickness of the outer side wall of the elbow S1 is (a) (mm) A1(3.0), B1(2.8), C1(2.9), D1(2.8) and E1(3.0)
S2:a(mm)A1(2.7),B1(2.9),C1(3.0),D1(2.8),E1(2.9)
S3:a(mm)A1(3.0),B1(2.8),C1(2.9),D1(2.9),E1(2.8)
S4:a(mm)A1(2.8),B1(2.7),C1(2.8),D1(2.7),E1(3.0)
S5:a(mm)A1(3.1),B1(2.9),C1(2.9),D1(2.8),E1(2.9)
The thicknesses of the inner side walls of the elbow S1: i (mm) are respectively A2(3.4), B2(4.0), C2(4.2), D2(3.7) and E2(3.8)
S2: i (mm) are A2(3.4), B2(4.0), C2(4.2), D2(3.7), E2(3.8) respectively
S3: i (mm) are A2(3.5), B2(3.4), C2(3.6), D2(3.7), E2(3.7) respectively
S4: i (mm) are A2(3.7), B2(4.1), C2(4.1), D2(4.2), E2(3.6) respectively
S5: i (mm) are A2(3.7), B2(4.1), C2(4.2), D2(3.3), E2(3.2) respectively
Roundness S1: 0 DEG: 4.7%, 45 DEG: 4.9%, 90 DEG: 5.5%, 135 DEG: 5.1%, 180 DEG: 5.2% when 1.4< R'/D. ' <2.5, roundness is less than or equal to 12%, straight section wall thickness: 3.1mm
Roundness S2: 4.6% at 0 degree, 4.8% at 45 degree, 5.4% at 90 degree, 5.2% at 135 degree, 4.9% at 180 degree when 1.4< R'/D. ' <2.5, roundness is less than or equal to 12%, straight section wall thickness: 3.2mm
Roundness S3: 4.6% at 0 degree, 4.9% at 45 degree, 5.6% at 90 degree, 5.3% at 135 degree, 4.9% at 180 degree when 1.4< R'/D. ' <2.5, roundness is less than or equal to 12%, straight section wall thickness: 3.2mm
Roundness S4: 4.5% at 0 DEG, 4.7% at 45 DEG, 5.3% at 90 DEG, 5.1% at 135 DEG, 4.9% at 180 DEG when 1.4< R'/D. ' <2.5, roundness is less than or equal to 12%, straight section wall thickness: 3.1mm
Roundness S5: 4.7% at 0 degree, 5.1% at 45 degree, 5.5% at 90 degree, 5.2% at 135 degree, 4.8% at 180 degree when 1.4< R'/D. ' <2.5, roundness is less than or equal to 12%, straight section wall thickness: 3.1mm
And (4) qualified standard:
and (4) conclusion: the coil bending process test is carried out according to the requirements of GB/T16507.5-2013 appendix A of Hot Water boiler, and the requirements of 6.4.2.4 are met by detecting the surfaces, the external dimensions and the like of 5 test pieces.
The tube number two 20 of Φ 51 × 3 was verified by the bending process test under the condition that the bending radius R' was 110.
The second tube 20 is bent to form an effective range,
any other parameter combinations T that can be covered in a given homogeneous group and elbow processFR110% of (i.e. T)FRLess than or equal to 8.67, and meets the design requirements.
As shown in fig. 3 and 4, the steps of the process for manufacturing the pressurized member in the coal-fired organic heat carrier heating furnace of the present embodiment include:
s1: respectively manufacturing a radiant tube section group 1, a ceiling tube group 3, a convection section tube group 2, an inlet header, an outlet header 5, a convection section header A6 and a convection section header B7;
s2: the inlet header is connected with the inlet of the convection section header A6, the outlet of the convection section header A6 is connected with the inlet of the convection section tube group 2, the outlet of the convection section tube group 2 is connected with the inlet of the convection section header B7, the outlet of the convection section header B7 is connected with the inlet of the radiant tube section group 1, the outlet of the radiant tube section group 1 is connected with the inlet of the ceiling tube group 3, and the outlet of the ceiling tube group 3 is connected with the outlet header 5.
As shown in fig. 3, a front header 81 and a rear header 82 are also produced in step S1; in step S2, the front header 81 is connected to the inlet of the ceiling tube group 3, the outlet of the radiant tube section group 1 is connected to the front header 81, the rear header 82 is connected to the outlet of the ceiling tube group 3, and the rear header 82 is further connected to the outlet header 5.
As shown in fig. 3, the outlet of the radiant tube section group 1 is connected to a front header 81 by a medium frequency solid bent tube group 9.
As shown in fig. 3, the aft header 82 is connected to the outlet header 5 by a transition tube group 100.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A manufacturing process of a pressure-receiving part in a coal-fired organic heat carrier heating furnace is characterized by comprising the step S1, wherein the step S1 comprises the manufacture of a radiant section coil pipe in a radiant section group (1) and the manufacture of a convection coil pipe in a convection section pipe group (2);
the method for determining the bending parameters of the bending part in the manufacturing of the radiant section coil pipe comprises the following steps:
selecting proper pipe diameter DoThe first tube (10) is subjected to trial bending and trial production by gradually increasing the bending radius R of the first tube (10) and reducing the wall thickness of the first tube (10), and after the trial bending is finished, the minimum bending radius R and the minimum wall thickness which meet the formula and meet the requirements of a bending process are selected as bending parameters of a bending part in the manufacturing of the radiation section coil; wherein, the first formula is:
the minimum bending radius R is an integer, the minimum wall thickness is 0.5k, and k is a natural number which is more than or equal to 8; doAnd R is in mm;
when D is presentoWhen 76, the minimum bending radius R is 279, and the minimum wall thickness is 4;
when D is presento89, the minimum bending radius R is 383, and the minimum wall thickness is 4;
when D is presentoWhen the minimum bending radius is 108, the minimum bending radius R is 500, and the minimum wall thickness is 4.5;
when D is presentoWhen the minimum bending radius is 114.3, the minimum bending radius R is 505, and the minimum wall thickness is 5;
when D is presento133, minimum bend radius R683, minimum wall thickness 5;
when D is presento159, the minimum bending radius R is 977, and the minimum wall thickness is 5;
the method for determining the bending parameters of the bending part in the manufacturing of the convection coil comprises the following steps:
selecting proper pipe diameter DoThe second tube (20) is subjected to trial bending and trial production by gradually reducing the bending radius R ' of the second tube (20) and selecting a proper wall thickness ' of the second tube (20), and the minimum bending radius R ' meeting the second formula and the requirement of a bending process is selected as a bending parameter of a bending part in the manufacture of the convection coil after the trial bending is finished; wherein, the formula two is:
the minimum bend radius R' is an integer; do', ' and R ' are in mm;
when D is presento38, minimum bend radius R 'is 61, minimum wall thickness' is 3;
when D is presento(vii) a minimum bend radius R 'of 86, a minimum wall thickness' of 3, when 45;
when D is presento(iii) 51, minimum bend radius R '110, minimum wall thickness' 3;
when D is presento57, minimum bend radius R '138, minimum wall thickness' 3;
when D is presento76, the minimum bending radius R 'is 184, and the minimum wall thickness' is 4;
when D is presento(iii) 89, minimum bend radius R '252, minimum wall thickness' 4;
when D is presento108, minimum bend radius R '370, minimum wall thickness' 4;
when D is presento133, minimum bend radius R '562, minimum wall thickness' 4;
the process steps comprise:
s1: respectively manufacturing a radiant tube section group (1), a ceiling tube group (3), a convection section tube group (2), an inlet header, an outlet header (5), a convection section header A (6) and a convection section header B (7);
s2: respectively connecting an inlet header with an inlet of a convection section header A (6), connecting an outlet of the convection section header A (6) with an inlet of a convection section tube group (2), connecting an outlet of the convection section tube group (2) with an inlet of a convection section header B (7), connecting an outlet of the convection section header B (7) with an inlet of a radiant tube section group (1), connecting an outlet of the radiant tube section group (1) with an inlet of a ceiling tube group (3), and connecting an outlet of the ceiling tube group (3) with an outlet header (5);
a front header (81) and a rear header (82) are also produced in step S1; in step S2, the front header 81 is connected to the inlet of the ceiling tube group 3, the outlet of the radiant tube section group 1 is connected to the front header 81, the rear header 82 is connected to the outlet of the ceiling tube group 3, and the rear header 82 is further connected to the outlet header 5.
2. The process for producing a pressurized member in a coal-fired organic heat carrier heating furnace according to claim 1, wherein: the outlet of the radiant tube section group (1) is connected with a front collecting pipe (81) through a medium-frequency three-dimensional bent pipe group (9).
3. The process for producing a pressurized member in a coal-fired organic heat carrier heating furnace according to claim 1, wherein: the rear header (82) is connected to the outlet header (5) by a transition pipe group (100).
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| CN2049565U (en) * | 1989-03-02 | 1989-12-20 | 东方锅炉厂 | Small bending radius u form pipe bender |
| CN201129849Y (en) * | 2007-07-27 | 2008-10-08 | 常州能源设备总厂有限公司 | Double-radial type organic heat carrier heating furnace |
| JP5311878B2 (en) * | 2008-05-22 | 2013-10-09 | 第一高周波工業株式会社 | Temperature differential bending method for metal pipes |
| CN206755584U (en) * | 2017-04-28 | 2017-12-15 | 常州能源设备总厂有限公司 | The radiation segment structure of organic thermal carrier heating furnace |
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Address after: 213000 No. 18 venture Road, Xinbei District, Jiangsu, Changzhou Patentee after: Changzhou Energy Equipment Co.,Ltd. Address before: 213033 No. 18 Chuangye Road, Xinbei District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU ENERGY ENGINEERING Co.,Ltd. |