CN211680455U - Heating device for build-up welding of inner wall of seal head - Google Patents
Heating device for build-up welding of inner wall of seal head Download PDFInfo
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- CN211680455U CN211680455U CN202020114740.9U CN202020114740U CN211680455U CN 211680455 U CN211680455 U CN 211680455U CN 202020114740 U CN202020114740 U CN 202020114740U CN 211680455 U CN211680455 U CN 211680455U
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Abstract
The utility model relates to the technical field of heating devices, and provides a heating device for build-up welding of an inner wall of a seal head, which comprises a position changer; the position changer comprises a rotary disc and a base, wherein the rotary disc is horizontally arranged, the base is positioned below the rotary disc, and the rotary disc is rotatably connected with the base; a through hole is formed in the center of the rotary disc; the device also comprises a plurality of connecting pipes fixedly connected with the base; the upper end of the connecting pipe penetrates through the through hole and extends to the upper part of the rotary disc; the upper end of each connecting pipe is fixed with a heating pipe which extends upwards; a heating space for heating the end socket is enclosed among the plurality of heating pipes; the upper end of the heating pipe is closed, and the inner cavity of the heating pipe is communicated with the inner cavity of the connecting pipe; the surface of the heating pipe is provided with a plurality of fire outlets which are arranged towards the heating space. The utility model discloses simple structure, the operation of being convenient for, and can carry out whole even heating to the head.
Description
Technical Field
The utility model relates to a heating device technical field, in particular to heating device for build-up welding of head inner wall.
Background
In the manufacturing process of the seal head of a large petrochemical container and the seal head of a nuclear power container, the seal head is made of low alloy steel, and stainless steel surfacing is needed on the inner wall of the seal head so as to achieve the purpose of corrosion resistance. Taking the reactor core water replenishing tank seal head of the class-A main equipment of the nuclear power plant as an example, 309L +308 double-layer stainless steel surfacing is required to be carried out on the inner wall of the seal head in the manufacturing process, and the main surfacing mode is as follows:
1. assembling the end socket and the position changer: the seal head and the position changer are fixedly connected by using the connecting tool, so that the continuous surfacing of the inner wall of the seal head is realized by using the rotating function of the position changer. The structure of the assembled end socket and positioner is shown in figure 1.
2. The end socket is driven to rotate by the positioner, and then 309L +308 layers of automatic surfacing are carried out by adopting strip surfacing equipment. The stainless steel overlaying layer 309L and the low alloy steel have high dilution rate after welding, so that welding cracks are easy to generate. In order to ensure the welding quality, the weldability of the surfacing welding mode requires that the integral preheating temperature of the end socket is between 150 ℃ and 177 ℃, and the temperature range to be controlled is extremely small.
In order to preheat the end socket to meet the welding process requirement, the end socket is usually heated by a natural gas burner, as shown in fig. 1. When the burner is used for heating, the distance from the burner to the outer wall of the end socket is far due to the influence of the connecting tool of the end socket and the positioner, so that the distance from flame to the outer wall of the end socket is far, the end socket cannot be effectively heated, the preheating time is extremely long, and the energy consumption is high; meanwhile, the flame of the burner is concentrated, and the preheating of the contact part of the burner and the seal head is concentrated, so that the heating condition of the seal head is uneven. Therefore, the common burner heating mode is difficult to meet the requirements that the whole end socket is heated and the temperature range is controlled to meet 150-177 ℃.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a heating device for build-up welding of head inner wall is provided, can be to the whole even heating of head.
The utility model provides a technical scheme that its technical problem adopted is: the heating device for the surfacing welding of the inner wall of the end socket comprises a position changer; the position changer comprises a horizontally arranged rotary disc and a base positioned below the rotary disc, and the rotary disc is rotatably connected with the base; a through hole is formed in the center of the rotary disc; the device also comprises a plurality of connecting pipes fixedly connected with the base; the upper end of the connecting pipe penetrates through the through hole and extends to the upper part of the rotary disc; the upper end of each connecting pipe is fixedly provided with an upward extending heating pipe; a heating space for heating the end socket is enclosed among the plurality of heating pipes; the upper end of the heating pipe is closed, and the inner cavity of the heating pipe is communicated with the inner cavity of the connecting pipe; the surface of the heating pipe is provided with a plurality of fire outlets which are arranged towards the heating space.
Furthermore, a valve is connected in series on the connecting pipe.
Furthermore, the projection of each heating pipe on the rotary disk is a straight line, and the extension line of the straight line passes through the central line of the rotary disk.
Furthermore, the heating pipe is arc-shaped, and the circle center of the heating pipe is positioned on the central line of the rotary disk.
Furthermore, the heating pipe and the connecting pipe which are connected with each other are of an integrally formed structure.
Furthermore, a plurality of connecting pipes are uniformly distributed and arranged on the circumference by taking the central line of the rotary disc as the center.
Further, the number of the connecting pipes is 6-8.
Furthermore, a plurality of heating pipes are connected through a first connecting piece.
Furthermore, the diameter of the fire outlet is phi 2 mm.
Furthermore, a plurality of fire outlets are arranged at intervals along the length direction of the heating pipe; the distance between the adjacent fire outlet holes on each heating pipe is 90-110 mm.
The utility model has the advantages that: the heating device for the surfacing welding of the inner wall of the seal head of the embodiment of the utility model has simple structure and convenient operation; the heating pipe and the connecting pipe do not rotate along with the rotation of the rotary disc, and when the device is used, the end socket only needs to be placed in a heating space and fixed on the rotary disc through the connecting tool, the end socket is driven to rotate through the rotary disc, and then the end socket is heated through the flame at the position of a fire hole in the heating pipe, so that the requirement of uniform heating of the whole end socket is met.
Drawings
FIG. 1 is a schematic structural diagram of a heating method of a burner nozzle for heating a seal head in the prior art;
fig. 2 is a schematic structural view of a heating device for build-up welding of the inner wall of the seal head of the embodiment of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is an enlarged view taken from the center of FIG. 3;
fig. 5 is a schematic structural diagram of the heating device for build-up welding of the inner wall of the end socket, which heats the end socket.
The reference numbers in the figures are: 1-positioner, 2-end enclosure, 3-connecting pipe, 4-heating pipe, 5-heating space, 6-fire outlet, 7-valve, 8-first connecting piece, 9-connecting tool, 10-burner, 11-rotary disk, 12-base and 13-through hole.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The utility model provides a heating device for build-up welding of the inner wall of a sealing head, which comprises a position changer 1; the positioner 1 comprises a horizontally arranged rotary disk 11 and a base 12 positioned below the rotary disk 11, and the rotary disk 11 is rotatably connected with the base 12; a through hole 13 is formed in the center of the rotary disc 11; the device also comprises a plurality of connecting pipes 3 fixedly connected with the base 12; the upper end of the connecting pipe 3 passes through the through hole 13 and extends to the upper part of the rotary disk 11; the upper end of each connecting pipe 3 is fixed with a heating pipe 4 extending upwards; a heating space 5 for heating the end socket 2 is enclosed among the plurality of heating pipes 4; the upper end of the heating pipe 4 is closed, and the inner cavity of the heating pipe 4 is communicated with the inner cavity of the connecting pipe 3; the surface of the heating tube 4 has several fire holes 6 arranged towards the heating space 5.
As shown in fig. 2 to 4, the positioner 1 includes a base 12 for supporting, a rotary disk 11 rotatably mounted above the base 12, and a driving mechanism for driving the rotary disk 11 to rotate; when the rotary table works, the driving mechanism is started, the driving mechanism drives the rotary disc 11 to rotate, and then the rotary disc 11 drives a workpiece fixed above the rotary disc to rotate for 360 degrees.
The number of connection pipes 3 means at least three connection pipes 3. The connecting pipe 3 and the heating pipe 4 are steel pipes, the connecting pipe 3 is fixedly connected with the base 12 through a fixing piece, the upper end of the connecting pipe 3 penetrates through the through hole 13 and extends to the upper part of the rotary disk 11, and therefore the rotary disk 11 is prevented from interfering with the connecting pipe 3 in the rotating process. The upper end of the connecting pipe 3 is fixedly connected with the lower end of the heating pipe 4, so that the inner cavity of the connecting pipe 3 is communicated with the inner cavity of the heating pipe 4; the upper end of the heating pipe 4 is welded with a blocking plate, and the upper end of the heating pipe 4 is sealed through the blocking plate.
Enclose into a heating space 5 between a plurality of heating pipe 4, be provided with a plurality of fire outlet 6 rather than the inner chamber intercommunication on the outer wall of every heating pipe 4, every fire outlet 6 sets up towards heating space 5 to the natural gas that lets in its inner chamber from the lower extreme of connecting pipe 3 spouts from fire outlet 6, after the natural gas of firing fire outlet 6 department, just can heat placing head 2 in this heating space 5.
The working process of the heating device for build-up welding of the inner wall of the end socket according to the embodiment of the present invention is described below with reference to fig. 5:
firstly, assemble head 2 and the ware 1 that shifts through connecting frock 9, it is specific: the connecting tool 9 is a plurality of support rods arranged along the circumference of the end socket 2, the number of the support rods is set according to the weight of the end socket 2, and the larger the weight of the end socket 2 is, the more the number of the support rods is; the upper end of the supporting rod is welded with the outer wall of the end enclosure 2, the lower end of the supporting rod is welded with the upper surface of the rotary disc 11, and the structure after assembly is shown in fig. 5; at the moment, the end socket 2 is suspended and fixed above the rotary disk 11, and the end socket 2 is positioned in the heating space 5. Then, a natural gas pipe is communicated with the lower end of the connecting pipe 3, and natural gas is introduced into the connecting pipe 3; igniting the natural gas at the fire hole 6. Then, the driving mechanism is started, the driving mechanism drives the rotary disc 11 to slowly rotate at a constant speed, and then the rotary disc 11 drives the seal head 2 to rotate for 360 degrees.
The utility model discloses heating device for build-up welding of head inner wall can heat head 2 through the flame of going out fire hole 6 department, compares with prior art, and the distance of flame to 2 outer walls of head is more nearly, will reduce heat time, improves heating efficiency, can avoid the flame of going out fire hole 6 department to appear the condition of concentrating simultaneously, makes the surface heating of head 2 even. Drive head 2 through gyration dish 11 and carry out 360 rotations, and then realize the flame to the even purpose of continuously heating in head 2 surface, realized that the multiple spot position evenly preheats, make the head whole be heated evenly, realized the accurate control of temperature.
Preferably, a valve 7 is connected in series to the connecting pipe 3. The valve 7 is used for adjusting the flow of the natural gas introduced into the connecting pipe 3, and further controlling the size of the flame at the fire outlet 6, so that the effect of uniform preheating can be ensured. Preferably, the diameter of the fire outlet 6 is phi 2 mm; the plurality of fire outlets 6 are arranged at intervals along the length direction of the heating pipe 4; the distance between the adjacent fire outlet holes 6 on each heating pipe 4 is 90-110 mm, and the preferred distance is 100 mm.
Preferably, as shown in fig. 3, the projection of each heating pipe 4 on the rotary disk 11 is a straight line, and the extension line of the straight line passes through the center line of the rotary disk 11, and preferably, a plurality of heating pipes 4 are uniformly arranged circumferentially around the center line of the rotary disk 11. Further, the heating pipe 4 is arc-shaped, and the center of the heating pipe is located on the central line of the rotary disk 11. The heating pipe 4 and the connecting pipe 3 can be made of common steel pipes, the heating pipe 4 is bent and formed according to the outer radius of the end socket 2 and the forming radius of 100mm, and then the fire hole 6 is drilled in the heating pipe 4. The heating pipe 4 and the connecting pipe 3 can be connected by welding, preferably, the heating pipe 4 and the connecting pipe 3 which are connected with each other are of an integrally formed structure.
Preferably, the plurality of connecting pipes 3 are uniformly distributed around the center line of the rotary disk 11. Further, as shown in fig. 2, each of the connection pipes 3 is vertically disposed. Preferably, the number of the connection pipes 3 is 6 to 8. As shown in fig. 3, the number of the connection pipes 3 is 8.
In order to improve the stability between the plurality of connection pipes 3, it is preferable that the plurality of connection pipes 3 are connected by a second connection member. The second connecting piece can be round steel, steel pipes and the like which are welded between the adjacent connecting pipes 3; the second connecting piece can also be a second fixing ring formed by round steel or a steel pipe, and the connecting pipe 3 is welded with the second fixing ring; the number of the second fixing rings can be one or more.
In order to increase the stability between several heating tubes 4, it is preferred that several heating tubes 4 are connected by a first connecting piece 8. The first connecting piece 8 can be round steel, steel pipe and the like welded between the adjacent heating pipes 4; the first connecting piece 8 can also be a first fixing ring formed by round steel or a steel pipe, and the heating pipe 4 is welded with the first fixing ring; the number of the first fixing rings can be one or more.
The utility model discloses heating device for head inner wall build-up welding has simple structure, and is with low costs, and the practicality is strong, characteristics such as the operation of being convenient for, can realize that the whole of large-scale head inner wall build-up welding preheats and interlaminar temperature control work, has improved the thermal efficiency and the preheating time of natural gas greatly, the effectual production efficiency that has improved, the difficult problem of production is preheated in the stainless steel build-up welding quality of being convenient for with the promotion, has solved the long-term puzzlement large-scale head inner wall build-up welding.
Claims (10)
1. The heating device for the surfacing welding of the inner wall of the end socket comprises a position changer (1); the positioner (1) comprises a horizontally arranged rotary disk (11) and a base (12) positioned below the rotary disk (11), and the rotary disk (11) is rotatably connected with the base (12);
the rotary disc is characterized in that a through hole (13) is formed in the center of the rotary disc (11); the device also comprises a plurality of connecting pipes (3) fixedly connected with the base (12); the upper end of the connecting pipe (3) penetrates through the through hole (13) and extends to the upper part of the rotary disc (11); the upper end of each connecting pipe (3) is fixed with a heating pipe (4) extending upwards; a heating space (5) for heating the end socket (2) is enclosed among the plurality of heating pipes (4); the upper end of the heating pipe (4) is closed, and the inner cavity of the heating pipe (4) is communicated with the inner cavity of the connecting pipe (3); the surface of the heating pipe (4) is provided with a plurality of fire outlets (6) which are arranged towards the heating space (5).
2. A heating device for end socket inner wall surfacing according to claim 1, characterized in that a valve (7) is connected in series on the connecting pipe (3).
3. A heating device for end socket inner wall surfacing according to claim 1, characterized in that the projection of each heating tube (4) on the rotary disk (11) is a straight line, and the extension line of the straight line passes through the center line of the rotary disk (11).
4. A heating device for end socket inner wall surfacing according to claim 3, wherein the heating pipe (4) is arc-shaped and the center of the heating pipe is located on the center line of the rotary disk (11).
5. A heating device for end socket inner wall overlaying according to claim 1, 2, 3 or 4, characterized in that the heating pipe (4) and the connecting pipe (3) connected with each other are of an integrally formed structure.
6. A heating device for end socket inner wall overlaying according to claim 1, 2, 3 or 4, characterized in that a plurality of connecting pipes (3) are uniformly arranged circumferentially around the center line of the rotary disk (11).
7. A heating device for end socket inner wall overlaying according to claim 6, wherein the number of said connecting tubes (3) is 6-8.
8. A heating device for end socket inner wall surfacing according to claim 1, 2, 3 or 4, characterized in that a plurality of heating pipes (4) are connected by a first connecting piece (8).
9. A heating device for end socket inner wall overlaying according to claim 1, 2, 3 or 4, wherein said fire holes (6) have a diameter of 2 mm.
10. A heating device for end socket inner wall overlaying according to claim 9, wherein a plurality of fire holes (6) are arranged at intervals along the length direction of the heating pipe (4); the distance between the adjacent fire outlet holes (6) on each heating pipe (4) is 90-110 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020114740.9U CN211680455U (en) | 2020-01-16 | 2020-01-16 | Heating device for build-up welding of inner wall of seal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020114740.9U CN211680455U (en) | 2020-01-16 | 2020-01-16 | Heating device for build-up welding of inner wall of seal head |
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| CN211680455U true CN211680455U (en) | 2020-10-16 |
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| CN202020114740.9U Active CN211680455U (en) | 2020-01-16 | 2020-01-16 | Heating device for build-up welding of inner wall of seal head |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115780960A (en) * | 2023-02-09 | 2023-03-14 | 二重(镇江)重型装备有限责任公司 | Large-scale rotating workpiece surfacing preheating device |
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2020
- 2020-01-16 CN CN202020114740.9U patent/CN211680455U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115780960A (en) * | 2023-02-09 | 2023-03-14 | 二重(镇江)重型装备有限责任公司 | Large-scale rotating workpiece surfacing preheating device |
| CN115780960B (en) * | 2023-02-09 | 2023-04-07 | 二重(镇江)重型装备有限责任公司 | Large-scale rotating workpiece surfacing preheating device |
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