CN202442043U - Tee joint - Google Patents

Abstract

The utility model discloses a tee joint which comprises a half tee joint part with a branch pipe and a half tee joint part without a branch pipe, wherien the half part with the branch pipe and the half part without the branch pipe are welded so as to form the tee joint. The tee joint provided by the utility model can maintain the weld joint quality, such as intensity and toughness, and can prevent a weld joint from bearing stress caused by the extruding and manufacturing processes of the tee joint.

Description

A kind of threeway

Technical field

The utility model relates to the engineering goods field, particularly a kind of threeway.

Background technique

Threeway is a kind of pipe fittings commonly used, and in pipe-line constructions such as petroleum gas, the application of wide tee (maximum caliber threeway diameter reaches 1219mm at present) increases gradually.At present, the manufacture process of threeway mainly is to adopt suitable pipe, forms tee branch through the pressure process of pulling out, thus production threeway product.For the less threeway of diameter, can adopt seamless steel pipe, through the technology manufacturing of hot and cold extrusion moulding.For the threeway more than the diameter 600mm,,, adopt hot-pressed mode to make so adopt the welded pipe base usually owing to there is not suitable seamless bloom.

Specifically, the process of welded pipe base hot extrusion production threeway is: (1) steel plate forms pipe after rolling welding; (2) heating of pipe blank is placed in the threeway mould, under the effect of press machine, accomplishes the process of tee branch place's bulge, this process possibly carried out repeatedly repeatedly, that is to say, pipe will carry out heating for multiple times; (3) bulge place perforate is carried out the hot pressing of arm and is pulled out process, and this process also needs the pipe heating for multiple times; (4) threeway bulk heat treatment.

Can find out that from above introduction and analysis the pipe of weldering system is in the process of making threeway, pipe and weld seam thereof will experience the process of heating and cooling for several times, and bigger variation can take place for material structure and performance; In addition, in hot extrusion process, the pipe weld seam will experience repeatedly distortion, this also properties of weld brought influence.Heating for multiple times can cause seam organization to change greatly, occurs obdurability easily and reduces, even be lower than the problem of engineering standard; Extrusion-deformation then causes weld seam crackle to occur easily.

Adopt pipe to make the hot extrusion threeway, can't avoid the repeatedly hot working and the load deflection of weld seam.Along with the raising of line transportation pressure, the strength grade of threeway tubing and weld seam improves constantly, and weld seam is responsive more to hot working and stress deformation, and this has just increased the manufacture difficulty of high-strength big-diameter threeway.

The model utility content

The utility model technical problem to be solved provides a kind of maintenance weldquality, the for example threeway of intensity, toughness etc.

For solving the problems of the technologies described above, the utility model provides a kind of threeway, comprising: arm half part is not with in three passband arms, half part and threeway; Said three passband arms half part and threeway are not with arm half part welding back to constitute threeway.

Further, said three passband arms half part and threeway are not 2 with the number of the weld seam of arm half part welding formation; Wherein, a weld seam is positioned at apart from the arm opening direction to be located for 90 °, and another weld seam is positioned at apart from the arm opening direction to be located for 270 °; The direction of two weld seams is parallel with said threeway person in charge opening direction.

A kind of threeway that the utility model provides can keep weldquality, and for example intensity, toughness etc. can avoid weld seam to bear the stress that threeway extruding manufacture process is brought.

Description of drawings

The three passband arms front view partly that Fig. 1 a provides for the utility model embodiment;

The three passband arms side view partly that Fig. 1 b provides for the utility model embodiment;

The threeway that Fig. 2 a provides for the utility model embodiment is not with the front view of a tubular portion;

The threeway that Fig. 2 b provides for the utility model embodiment is not with the side view of a tubular portion;

The front view of two weld seam wide tee structures that Fig. 3 a provides for the utility model embodiment;

The side view of two weld seam wide tee structures that Fig. 3 b provides for the utility model embodiment.

Embodiment

Shown in Fig. 1 a, 1b, 2a, 2b, 3a, 3b, a kind of threeway that the utility model embodiment provides comprises that three passband arms, half part and threeway be not with arm half part.Three passband arms, half part and threeway are not with arm half part welding back to constitute threeway.Three passband arms, half part and threeway are not 2 with a number of the weld seam that the tubular portion welding forms; Wherein, a weld seam 10 is positioned at apart from the arm opening direction to be located for 90 °, and another weld seam 10 is positioned at apart from the arm opening direction to be located for 270 °; The direction of two weld seams is parallel with the person in charge of threeway 8 opening directions.Person in charge's section girth of three passband arms, half part is 0.5 π D.Threeway is not 0.5 π D with person in charge's section girth of arm half part.The diameter of arm 3 or girth are confirmed according to design demand.

The threeway of a kind of pair of welding line structure form of the utility model design, thereby can threeway is divided into the band arm and not be with arm two-part, be welded at last.Threeway with adopting the manufacturing of single weld seam pipe is compared, and two weld seam threeways can be eliminated repeatedly the influence that hot working butt welded seam quality is brought, and can avoid weld seam to bear the stress that threeway extruding manufacture process is brought simultaneously.The utility model is applicable to industry-by-industry or the engineering of using threeway, and is especially suitable for the wide tee that can't adopt seamless steel pipe.

It should be noted last that; Above embodiment is only unrestricted in order to the technological scheme of explanation the utility model; Although with reference to instance the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technological scheme of the utility model; And not breaking away from the spirit and the scope of the utility model technological scheme, it all should be encompassed in the middle of the claim scope of the utility model.

Claims (4)

1. a threeway is characterized in that, comprising:

A tubular portion is not with in three passband arms, half part and threeway; Said three passband arms half part and threeway are not with arm half part welding back to constitute threeway.

2. threeway according to claim 1 is characterized in that:

Said three passband arms half part and threeway are not 2 with the number of the weld seam of arm half part welding formation; Wherein, a weld seam is positioned at apart from the arm opening direction to be located for 90 °, and another weld seam is positioned at apart from the arm opening direction to be located for 270 °; The direction of two weld seams is parallel with person in charge's opening direction of said threeway.

3. threeway according to claim 1 and 2 is characterized in that:

It is 0.5 π D that said three passband arms half part is responsible for section girth.

4. threeway according to claim 1 and 2 is characterized in that:

It is 0.5 π D that said threeway is not with a tubular portion to be responsible for section girth.

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