CN110142525A

CN110142525A - A kind of big tube socket welding method of straddling type

Info

Publication number: CN110142525A
Application number: CN201910405422.XA
Authority: CN
Inventors: 张玮; 张涛; 王冬平; 曾会强
Original assignee: Dongfang Boiler Group Co Ltd
Current assignee: Dongfang Boiler Group Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2019-08-20
Anticipated expiration: 2039-05-16
Also published as: CN110142525B

Abstract

The invention discloses a kind of big tube socket welding methods of straddling type, comprising the following steps: A) the pore center line of stroke tube socket on cylinder, abdomen built-up welding is drawn on cylinder according to tube socket size and fills range line；B) it is greater than the outer diameter of tube socket to shoulder, the outer rim of deposited metal is higher by cylinder abdomen deposited metal by abdomen built-up welding filling range line；C the pore that tube socket) is processed on cylinder will be processed as plane at the top of deposited metal by normal of pore center line, the plane and pore central axis, and its height is higher than shoulder；D；Tube socket is connect one end with cylinder and processes groove；E) tube socket and cylinder are assembled and are welded the butt weld of tube socket and cylinder；The present invention can reduce the welding difficulty and retaining wall on slope difficulty of Nozzle weld, improve the stability and reliability of welding quality, be also convenient for realizing the automation and intelligence of Nozzle weld welding, reduce welding labor intensity, improve operating environment.

Description

A kind of big tube socket welding method of straddling type

Technical field

The present invention relates to a kind of tube socket welding methods, are especially used for the big tube socket welding side of straddling type of station boiler header Method.

Background technique

Header is the important pressure-containing member of station boiler, as shown in Figure 1, being disposed with more diameter on its cylinder 6 is φ 100mm ~ φ 355.6mm, the tube socket 7 that wall thickness is 10 ~ 75mm, in the form of groove corner connection on the header cylinder 6 of welding, due to Its welding groove is saddle-shaped groove, so this kind connection tube socket is usually called the big tube socket of straddling type, weld characteristics are 6 outer diameter of header cylinder is smaller with 7 outer diameter of tube socket, at shoulder weld seam 8(weld seam loading minimum) and abdomen weld seam 9(weld seam Loading maximum) cross section differs greatly, and two position while weldings differ 90 degree in the circumferential, and welding loading is extremely uneven；Pipe 7 wall thickness of seat are very thick, and welding loading is big, and welding bead is more, and welding bead arranges that difficulty is big；Horizontal position welding, saddle drop is big, weld seam at Shape control requires height, and welding is difficult；Therefore, generally use that " hand tungsten argon arc welding decorates, bottoming+hand to this kind of tube socket Work arc welding fills capping " or " hand tungsten argon arc welding is decorateeed, bottoming+manual electric arc welding transition+gas shielded arc welding filling, is covered Face " etc. is manual or automanual welding operation mode, and not only the degree of automation is low, large labor intensity, and welding environment is poor, and welds The quality for connecing quality depends entirely on the operation level and sense of responsibility of welder.

Summary of the invention

The purpose of the present invention is the above-mentioned deficiencies for the prior art, provide a kind of container girth joint ray detecting apparatus, It can reduce the welding difficulty and retaining wall on slope difficulty of Nozzle weld, improve the stability and reliability of welding quality, also just In the automation and intelligence of realizing Nozzle weld welding, welding labor intensity is reduced, operating environment is improved.

In order to achieve the above object, the big tube socket welding method of a kind of straddling type of the invention, it is characterised in that including following Step: A) the pore center line of stroke tube socket on cylinder, abdomen built-up welding is drawn on cylinder according to tube socket size and fills range line； B) it is greater than the outer of tube socket to shoulder, the outer rim of deposited metal is higher by cylinder abdomen deposited metal by abdomen built-up welding filling range line Diameter；C the pore that tube socket) is processed on cylinder will be processed as plane at the top of deposited metal by normal of pore center line, should Plane and pore central axis, and its height is higher than shoulder；D；Tube socket is connect one end with cylinder and processes groove；E) will Tube socket and cylinder assemble and weld the butt weld of tube socket and cylinder；

The present invention marks the cylinder abdomen built-up welding position line according to tube socket position, and cylinder abdomen heap is welded to not less than shoulder, then Cylinder pore is processed, and deposited metal is processed into plane not less than shoulder and vertical with pore line, finally by tube socket welding equipment Onto cylinder；By the way that the connection of cylinder and tube socket is converted to circumferential plane butt weld by saddle-shaped groove corner connection weld seam, from And the welding difficulty of Nozzle weld is reduced, the stability and reliability of welding quality are improved, retaining wall on slope hardly possible can also be reduced Degree reduces welding labor intensity, improves operating environment；

As a further improvement of the present invention, the deposited metal is the rotary table equipped with inner hole, and the top outer diameter of rotary table is greater than pipe The outer diameter of seat, inner hole are less than the internal diameter of tube socket；Built-up welding workload can be reduced, and improves overlay cladding intensity；

As a further improvement of the present invention, deposited metal is higher by shoulder not less than 5 millimeters in the step B；Plane in step C Height is higher than at least 0.5 millimeter of shoulder；There is welding defect and prevents from injuring cylinder in deposited metal after can avoid processing；

As a further improvement of the present invention, tube socket is connect one end with cylinder in the step D and is processed as reserved root face b, half The circumferential J-type groove of diameter R, angle [alpha]；Groove width can be reduced, save wlding and improve welding efficiency；

As a further improvement of the present invention, the built-up welding in the step B and E or welding equipment be automatic welding, special plane welding or One of manual welding, and realize complete penetraction and fusion in welding；Due to reducing welding difficulty, can be used any one in said welding method Kind, the automation and intelligence of Nozzle weld welding are easy to implement using automatic welding；

In conclusion the present invention can reduce the welding difficulty and retaining wall on slope difficulty of Nozzle weld, the steady of welding quality is improved Qualitative and reliability is also convenient for realizing the automation and intelligence of Nozzle weld welding, reduces welding labor intensity, improve and make Industry environment.

Detailed description of the invention

Fig. 1 is the shoulder weld seam of existing cylinder and tube socket and the welding structure comparison diagram of abdomen weld seam.

Fig. 2 is the main view of midriff of embodiment of the present invention built-up welding.

Fig. 3 is the left view of Fig. 2.

Fig. 4 is pore and built-up welding plane machining schematic diagram in the embodiment of the present invention.

Fig. 5 is the left view of Fig. 4.

Fig. 6 is tube socket welding equipment schematic diagram in the embodiment of the present invention.

Fig. 7 is the left view of Fig. 6.

Specific embodiment

With reference to the accompanying drawing, the present invention is described in further detail.

The big tube socket welding method of the straddling type of the embodiment, comprising the following steps: A) it is drawn on cylinder in the pore of tube socket Heart line draws abdomen built-up welding on cylinder according to tube socket size and fills range line；B) as shown in Figure 2 and Figure 3, filled by abdomen built-up welding Range line, to shoulder is higher by, is higher by the distance h of shoulder not less than 5 millimeters, deposited metal 2 is to set in 1 abdomen deposited metal 2 of cylinder There is the rotary table of inner hole, the top outer diameter of rotary table is greater than the outer diameter of tube socket, and the inner hole aperture d1 of rotary table is less than the internal diameter d of tube socket, heap Weldering using can be realized weld seam automatic identification, automatically track, arrange welding bead and layer automatically, being capable of continuously or intermittently intelligence such as welding The automatic welding of energyization control；C) as shown in Figure 4, Figure 5, the pore 3 of tube socket is processed on cylinder 1, deposited metal 2 is same When also process the via hole of tube socket, plane will be processed as at the top of deposited metal 2 by normal of pore center line, the plane and pipe Centerline hole is vertical, and its height is higher than at least 0.5 millimeter of shoulder；D；As shown in Figure 6, Figure 7, tube socket 4 is connect one with cylinder 1 End be processed as reserved root face b, radius R, angle [alpha] circumferential J-type groove；E) tube socket 4 and cylinder 1 are assembled and weld tube socket with The butt weld 5 of cylinder, the welding using can guarantee complete penetraction and fusion in welding, can be realized groove and weld seam automatic identification, automatically track, Automatic arrangement welding bead and layer, the automatic welding for capableing of continuously or intermittently intelligentized control methods such as welding；

The present invention marks the cylinder abdomen built-up welding position line according to tube socket position, and cylinder abdomen heap is welded to not less than shoulder, then Cylinder pore 3 is processed, and deposited metal 2 is processed into plane not less than shoulder and vertical with pore line, finally fills tube socket 4 It is soldered on cylinder 1；By the way that the connection of cylinder 1 and tube socket 4 is converted to circumferential plane butt welding by saddle-shaped groove corner connection weld seam Seam, to reduce the welding difficulty of Nozzle weld, can be used automatic welding, be easy to implement the welding of Nozzle weld 5 oneself Dynamicization and intelligence improve the stability and reliability of welding quality, can also reduce retaining wall on slope difficulty, reduce welding labour Intensity improves operating environment；Circumferential J-type groove can reduce groove width, saves wlding and improve welding efficiency；

The present invention is not limited to the above embodiments, as in step B and E built-up welding or welding equipment can be used special plane welding or by hand apply Weldering.

Claims

1. a kind of big tube socket welding method of straddling type, it is characterised in that the following steps are included: A) pore of stroke tube socket on cylinder Center line draws abdomen built-up welding on cylinder according to tube socket size and fills range line；B abdomen built-up welding filling range line) is pressed in cylinder Abdomen deposited metal is greater than the outer diameter of tube socket to shoulder, the outer rim of deposited metal is higher by；C the pipe of tube socket) is processed on cylinder Hole will be processed as plane at the top of deposited metal by normal of pore center line, the plane and pore central axis, and it is high Degree is higher than shoulder；D；Tube socket is connect one end with cylinder and processes groove；E) tube socket and cylinder are assembled and weld tube socket and cylinder The butt weld of body.

2. the big tube socket welding method of a kind of straddling type according to claim 1, it is characterised in that: the deposited metal is to set There is the rotary table of inner hole, the top outer diameter of rotary table is greater than the outer diameter of tube socket, and inner hole is less than the internal diameter of tube socket.

3. the big tube socket welding method of a kind of straddling type according to claim 1 or 2, it is characterised in that: heap in the step B Weldering metal is higher by shoulder not less than 5 millimeters；Level is higher than at least 0.5 millimeter of shoulder in step C.

4. the big tube socket welding method of a kind of straddling type according to claim 3, it is characterised in that: will pipe in the step D Seat connect with cylinder one end be processed as reserve root face b, radius R, angle [alpha] circumferential J-type groove.

5. the big tube socket welding method of a kind of straddling type according to claim 4, it is characterised in that: in the step B and E Built-up welding or welding equipment are one of automatic welding, special plane welding or manual welding, and realize complete penetraction and fusion in welding.