CN203209858U

CN203209858U - Direction-variable groove of annular butt welding seam

Info

Publication number: CN203209858U
Application number: CN 201320225852
Authority: CN
Inventors: 王奉强; 邱佳龙
Original assignee: Hangzhou Fulton Thermal Energy Equipment Co Ltd
Current assignee: Hangzhou Fulton Thermal Energy Equipment Co Ltd
Priority date: 2013-04-28
Filing date: 2013-04-28
Publication date: 2013-09-25
Anticipated expiration: 2023-04-28

Abstract

The utility model belongs to the technical field of metal welding structures and particularly relates to a direction-variable groove of an annular butt welding seam. The groove has a unique structure and comprises tube bodies welded in pair; the tube bodies are provided with grooves comprising threes groove types of groove I, groove II and groove III; the groove I is a unilateral 35-degree V-shaped groove facing the circle center of the tube body; the groove II is X-shaped; the groove III is a unilateral 35-degree V-shaped groove back on to the circle center of the tube body; a wide truncated edge of 1-2mm is reserved at the periphery of the groove I; a wide truncated edge of 1-2mm is reserved in the middle of the groove II and transits to the inner periphery from the outer periphery; a wide truncated edge of 1-2mm is reserved at the inner periphery of the groove III. According to the direction-variable groove of the annular butt welding seam, an over-head position welding joint is avoided in the welding of the annular butt welding seam when a shell ring is replaced during the site repairing of a horizontal boiler, thus ensuring the welding quality and the appearance molding of the welding seam during the repairing of the annular butt welding seam of a boiler pressed element.

Description

The groove of changing direction of hoop butt weld

Technical field

The utility model belongs to the metal weldedstructure technical field, is specifically related to a kind of groove of changing direction of hoop butt weld of structure uniqueness.

Background technology

Because a large amount of Welding Structure and solder technology used in the boiler pressure parts manufacture process, so when the boiler pressure parts needs place under repair, also will inevitably run into a large amount of pressure parts welding jobs, and the welding job in the repair procedures has with welding job in the manufacture process many different; Wherein, the most tangible difference is the restriction that is subjected to place and equipment in the repair procedures, and the boiler pressure parts can not stand up, rotate as that works in the workshop, comes the boiler pressure parts is carried out weld repairs and can only change the welding position as required.In the four kinds of welding positions of downhand welding, vertical position welding, horizontal position welding, overhead welding that run into when adopting welding rod arc welding method (SMAW) in the boiler pressure parts repair procedures, number overhead position welding difficulty maximum, requirement to operating personnel is also high, often is difficult to obtain satisfactory high-quality welded joint; So, when the SMAW welding point that the design REPSH repair shop needs, should avoid adopting the welding point of overhead position, to guarantee welding quality as far as possible.

The spot repair horizontal boiler needs transposing (when diameter 〉=800mm) tube sheet (end socket), shell ring, the general SMAW grooves of welding joints pattern that adopts is the butt weld of single face V-butt, so then runs into the overhead position welding point inevitably when welding.

The utility model content

(avoid adopting the overhead position welding point in the repair work of the hoop butt weld that runs into when diameter 〉=800mm) tube sheet (end socket), shell ring in order to repair horizontal boiler transposing at the scene as far as possible, the utility model is by adopting a kind of divided edge structure of changing direction of hoop butt weld, thereby avoids adopting the overhead position welding point.Welding quality and weld appearance moulding when guaranteeing that the butt weld of boiler pressure parts hoop is repaired.

The utility model is achieved through the following technical solutions: a kind of groove of changing direction of hoop butt weld, comprise cylindrical shell, and cylindrical shell pairing welding, cylindrical shell is offered groove, and described groove comprises groove I, groove II, three kinds of groove types of groove III.Described groove I be opening direction towards the double V-groove in the cylindrical shell center of circle, described groove II is X type groove, described groove III is the opening direction double V-groove in the cylindrical shell center of circle dorsad.

As preferably, the double V-groove of the double V-groove of described groove I and groove III is monolateral 35 ° of double V-grooves.

As preferably, described groove I periphery leaves the wide root face of 1 ~ 2mm, leaves the wide root face of 1 ~ 2mm in the middle of the described groove II, and root face progressively carries out the transition to interior week from periphery, the wide root face of Zhou Liuyou 1 ~ 2mm in the described groove III.

After the utility model has been taked above-mentioned corrective measure, its beneficial effect is remarkable: arranged a changeover portion bevel for welding structure in the middle vertical position of welding of common double V-groove owing to adopted, make V-butt in the bottom of circumferential weld be the single face opening towards the double V-groove in the cylindrical shell center of circle, welding post is the downhand position; After interlude was connected, bevel for welding progressively carried out the transition to the X type groove of open double-faced from the double V-groove of opening towards the cylindrical shell center of circle, and the X type groove from open double-faced progressively carries out the transition to the opening double V-groove in the cylindrical shell center of circle dorsad again; Welding post is inside and outside vertical position of welding; The single face opening double V-groove in the center of circle is dorsad formed at the top of having arrived circumferential weld, and welding post becomes the downhand position again; Therefore avoid the welding post of overhead position, thereby guaranteed to repair welding quality and the weld appearance moulding of weld seam.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is the side sectional view of the utility model embodiment 1;

Fig. 3 is the stereogram of the utility model embodiment 1.

1 is the groove I among the figure, the 2nd, and groove II, the 3rd, groove III, the 4th, root face.

The specific embodiment

The contrast accompanying drawing is further described the utility model in conjunction with the embodiments below:

With reference to Fig. 1, Fig. 2, shown in Figure 3, a kind of groove of changing direction of hoop butt weld comprises cylindrical shell, cylindrical shell pairing welding, and cylindrical shell is offered groove, comprises groove I 1, groove II 2, groove III 3.Groove I 1 be opening direction towards monolateral 35 ° of double V-grooves in the cylindrical shell center of circle, the V-butt periphery leaves the wide root face 4 of 1 ~ 2mm; Groove II 2 is X type groove, leaves the wide root face 4 of 1 ~ 2mm in the middle of the double V groove, and root face 4 progressively carries out the transition to interior week from periphery; Groove III 3 is opening direction monolateral 35 ° of double V-grooves in the cylindrical shell center of circle dorsad, reserves the wide root face 4 of 1 ~ 2mm in the V-butt week.

As Fig. 1, understand for convenient, mark A, B, four terminating points of C, D, the A-B section that runs in the welding process is welded in cylindrical shell, and welding post is downhand welding; The A-D section that runs into, B-C section are in the inside and outside welding of cylindrical shell, and welding post is vertical position welding; The C-D section that runs into is in the cylindrical shell external welding, and welding post is downhand welding; This shows behind the groove of changing direction of employing hoop butt weld, to have only downhand welding, vertical position welding, three kinds of welding posts of downhand welding in the whole piece girth welding, the welding post of not welding in the overhead position.

What more than enumerate only is specific embodiment of the utility model; obviously; the utility model is not limited to above embodiment, and all distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should belong to protection domain of the present utility model.

Claims

1. the groove of changing direction of a hoop butt weld, comprise cylindrical shell, cylindrical shell pairing welding, cylindrical shell is offered groove, it is characterized in that: described cylindrical shell groove comprises groove I, groove II, three kinds of groove types of groove III, described groove I be opening direction towards the double V-groove in the cylindrical shell center of circle, described groove II is X type groove, described groove III is the opening direction double V-groove in the cylindrical shell center of circle dorsad.

2. the groove of changing direction of hoop butt weld according to claim 1, it is characterized in that: the double V-groove of the double V-groove of described groove I and groove III is monolateral 35 ° of double V-grooves.

3. the groove of changing direction of hoop butt weld according to claim 1 and 2, it is characterized in that: described groove I periphery leaves the wide root face of 1 ~ 2mm; Leave the wide root face of 1 ~ 2mm in the middle of the described groove II, root face progressively carries out the transition to interior week from periphery; The wide root face of Zhou Liuyou 1 ~ 2mm in the described groove III.