CN102853193A - Flat steel bifurcated pipe and manufacturing method thereof - Google Patents

Abstract

The invention relates to a flat steel bifurcated pipe and a manufacturing method thereof. The flat steel bifurcated pipe comprises a main pipe, a left branch cone and a right branch cone, wherein one end of the left branch cone is communicated with one end of the main pipe; one end of the right branch cone is communicated with one end of the main pipe; one side of the left branch cone leans against and is welded with one side of the right branch cone; another end of the left branch cone and another end of the right branch cone are respectively communicated with a left branch pipe and a right branch pipe; bottoms of the main pipe, the left branch cone, the right branch cone, the left branch pipe and the right branch pipe are located at the same one altitude. The flat steel bifurcated pipe has the advantages that the shape of the flat steel bifurcated pipe is different from the principle of the same one altitude of axial lines of various pipe joints of the other steel bifurcated pipes and ensures the same one altitude on the bottom of the various pipe joints; the same one altitude on the bottom of the pipe has independent goodness; water can flow freely to be discharged when high-pressure pipes are maintained without pumping the water by a water pump or arranging holes on the steel bifurcated pipe and connecting with a special drainage system; the drainage time is shortened greatly, and the effective work time for maintenance is prolonged; the flat steel bifurcated pipe has the advantages of regular shape, no deformity portions, reasonable force and no stress concentration phenomenon.

Description

A kind of flat steel bifurcated pipe and manufacture method thereof

Technical field

The present invention relates to a kind of steel bifurcated pipe and manufacture method thereof, especially relate to a kind of flat steel bifurcated pipe and manufacture method thereof.

Background technique

At present, large quantities of world-class large-scale power stations are just built or are in the middle of the planning at Southwestern China, the product HD value of the design head in water power plant and conduit pipe caliber is increasing, engineering geological condition becomes increasingly complex, and this scientific and technological level and technology to China's construction of hydropower facilities proposes Secretary.And the steel bifurcated pipe is one of the important component part in pumped storage power station and conventional water channeling type power station, and its safety is most important.In built power station with building, the steel bifurcated pipe is used widely.Bifurcated pipe pattern commonly used mainly contains: hem reinforced branch pipe, three beam bifurcated pipes, Rib Reinforced Bifurcation Pipe, spherical manifold penstock, without the beam bifurcated pipe etc.

Reach in reasonable in design, fabrication and installation in the situation of related specifications requirement, all steel bifurcated pipe patterns of the operation of having put into production all can be distributed current, and structural safety is stable.Comparatively advanced Steel Y-pipe with Crescent Rib even can guarantee to have less loss of head and stress phase preferably.But, in the utilization process, all above steel bifurcated pipe patterns all can not be considered the requirement of pressure steel pipe of hydropower station free-draining in the repair and maintenance process, if need repair and maintenance, can only adopt pumping for water pump or bifurcated pipe shell position to box out to run in water pipe to carry out the modes such as draining.

Summary of the invention

The present invention solves the existing technical problem of prior art; A kind of same elevation at the bottom of each tube coupling pipe that guaranteed is provided, can free-draining when high pressure pipe line overhauls, do not need to adopt pumping for water pump or box out and connect special-purpose drainage system at the steel bifurcated pipe.Can greatly shorten water discharge time, increase a kind of flat steel bifurcated pipe and the manufacture method thereof of the effective working of maintenance.

It is to solve the existing technical problem of prior art that the present invention also has a purpose; Provide a kind of and be well-proportioned, do not had maleformation, reasonable stress does not have a kind of flat steel bifurcated pipe and the manufacture method thereof of obvious stress concentration phenomenon.

Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:

A kind of flat steel bifurcated pipe is characterized in that, comprises that a left side that supervisor, an end are communicated with supervisor's a end props up the right side that cone, an end be communicated with supervisor's a end and prop up a side of a side that cone, a described left side prop up cone and right cone and recline and be welded and fixed; The other end of left the cone the other end and right cone is communicated with respectively left arm and right arm, and the bottom of described supervisor, left cone, right the left arm of cone and right arm all is positioned at same elevation place.

At above-mentioned a kind of flat steel bifurcated pipe, cone is propped up on a described left side and right cone circumferentially is provided with waist rail with supervisor's connectivity part along supervisor's outer wall.

At above-mentioned a kind of flat steel bifurcated pipe, a described left side is propped up cone and circumferentially is provided with one U-shaped with right the cone place of being welded and fixed.

At above-mentioned a kind of flat steel bifurcated pipe, a described left side is propped up cone and also is provided with an interior reinforcement crescent moon floor with right the cone place of being welded and fixed inwall.

A kind of manufacture method of flat steel bifurcated pipe is characterized in that, based on definition: a left axis of cone line and supervisor's axis angle

A right axis of cone line and supervisor's axis angle

The angle of then diverging is

Supervisor's radius R, left arm radius r ₁, right arm radius r ₂, left cone half cone apex angle α ₁, right cone half cone apex angle α ₂, to strengthen deck-siding be that YL, U beam extension are that UL, interior reinforcement crescent moon floor inside protrudent length are NL to waist rail, cuts out required form corresponding to landform at steel plate, then rolls into supervisor, left cone, right and bore left arm and right arm, weld together, wherein,

Described supervisor is based on formula:

$\left\{\begin{array}{c}{y}_2=R\cos \mathrm{\θ}\\ z_2=R\sin \mathrm{\θ}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation;

Cone is propped up on a described left side and right propping up bored all based on formula:

x ₁ ²+ z ₁ ²=(R/cos θ-y ₁Tan α) ², wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, α props up cone for a left side and represents α ₁, prop up cone for the right side and represent α ₂

Described left arm and right arm are all based on formula:

$\left\{\begin{array}{c}{y}_4=r\cos \mathrm{\θ}\\ z_4=r\sin \mathrm{\θ}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation;

Described supervisor bores the intersecting line equation all based on formula with the left cone that props up with right:

$\left\{\begin{array}{c}{x}_2=\frac{R\sin r\cos \mathrm{\θ}-R\sin \mathrm{\α}}{\±\cos \mathrm{\α}-\cos r}\\ y_2=R\cos \mathrm{\θ}\\ z_2=R\sin \mathrm{\θ}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and r is intermediate variable;

Cone and right cone intersecting line are propped up based on formula in a described left side:

$\left\{\begin{array}{c}{x}_5=\cos \mathrm{\θ}(\frac{R}{{\cos \mathrm{\α}}_2}+z_5{\tan \mathrm{\α}}_2)\\ y_5=\sin \mathrm{\θ}(\frac{R}{{\cos \mathrm{\α}}_2}+z_5{\tan \mathrm{\α}}_2)\\ z_5=\frac{{b\cos \mathrm{\α}}_2-R\cos \mathrm{\θ}}{{\cos \mathrm{\α}}_2({\tan \mathrm{\α}}_2\cos \mathrm{\θ}-a)}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and a, b are intermediate variable;

Cone and left arm and right cone and right branch pipe intersecting line are propped up based on formula in a described left side:

$\left\{\begin{array}{c}{x}_4=\frac{{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="120924115832.png"\; state="\{\{state\}\}">r</figure-callout>}}_1\sin \mathrm{\&alpha;}(1+\sin \mathrm{\&theta;})}{2\cos \mathrm{\&alpha;}}\\ y_4={\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="120924115832.png"\; state="\{\{state\}\}">r</figure-callout>}}_1\cos \mathrm{\&theta;}\\ z_4={\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="120924115832.png"\; state="\{\{state\}\}">r</figure-callout>}}_1\sin \mathrm{\&theta;}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and α props up cone for a left side and represents α ₁, prop up cone for the right side and represent α ₂

The peripheral curve of described waist rail is based on formula:

$\left\{\begin{array}{c}{x}_3=0\\ y_3=(\frac{R}{\cos \mathrm{\&delta;}}+\mathrm{YL})\cos \mathrm{\&theta;}\\ z_3=(R+\mathrm{YL})\sin \mathrm{\&theta;}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and δ is intermediate variable;

The peripheral curve of described U-shaped beam is based on formula:

$\left\{\begin{array}{c}{x}_6=(\mathrm{CL}+\mathrm{UL})\cos \mathrm{\&theta;}\\ y_6=(\mathrm{DL}+\mathrm{UL})\sin \mathrm{\&theta;}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and CL, DL are intermediate variable;

Described interior reinforcement crescent moon floor inner edge line is based on formula:

$X_6=\frac{x_6-O_{6}W}{{z_6}^2}{Z_6}^2+\mathrm{CL}-\mathrm{NL},$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and CL, DL are intermediate variable.

Therefore, the present invention has following advantage: advantage of the present invention and effect: 1. flat steel bifurcated pipe build is different from the principle of the same elevation of each tube coupling axis of other steel bifurcated pipes, but has guaranteed same elevation at the bottom of each tube coupling pipe.Same elevation has unique advantage at the pipe end, can free-draining when high pressure pipe line overhauls, and do not need to adopt pumping for water pump or box out and connect special-purpose drainage system at the steel bifurcated pipe.Can greatly shorten water discharge time, increase the effective working of maintenance; 2. the steel bifurcated pipe by actual water power plant is after example is studied the mechanical characteristic of flat steel bifurcated pipe, has verified the dependable with function of this build, and this is well-proportioned, and does not have maleformation, and reasonable stress does not have obvious stress concentration phenomenon.

Description of drawings

Fig. 1 a is main TV structure schematic representation of the present invention;

Fig. 1 b is the plan structure schematic representation of Fig. 1 a.

Fig. 1 c is the left TV structure schematic representation of Fig. 1 a.

Fig. 1 d is for being perspective view of the present invention.

Fig. 2 a is substantially known engineering parameter of the present invention, expresses with plan view.(wherein, 28-supervisor radius R, the left arm radius r of 29- ₁, the right arm radius r of 30- ₂, left axis of cone line of 31-and supervisor's axis angle

The right axis of cone line of 32-and supervisor's axis angle

Left cone half cone of 33-apex angle α ₁, right cone of 34-half cone apex angle α ₂, to strengthen deck-siding be that YL, 36-U beam extension are that to strengthen crescent moon floor inside protrudent length in UL, the 37-be NL to the 35-waist rail).

Fig. 2 b is that the side view of Fig. 2 a is expressed.

Fig. 3 a is supervisor's part math equation accompanying drawing of the present invention (wherein, 11-supervisor equation, 12-prop up cone equation, 13-arm equation, 14-is responsible for and a cone intersecting line equation, 15-prop up cone and prop up a cone intersecting line equation, 16-props up cone and branch pipe intersecting line equation).

Fig. 3 b is the girder system part math equation accompanying drawing (wherein, strengthening crescent moon floor inner edge line equation in the peripheral curvilinear equation of 17-waist rail, the peripheral curvilinear equation of 18-U beam, the 19-) of Fig. 3 a.

Fig. 4 a be process schematic representation of the present invention supervisor's schematic cross-section (wherein, 21 for θ be expansion parameter),

Fig. 4 b is that the supervisor of Fig. 4 a launches schematic representation (wherein, 21 is that θ, 22 is R θ, is expansion parameter).

Fig. 4 c is the Taper Pipe cross section (wherein, 23 is that α, 24 is that μ, 25 is υ, is expansion parameter) of process schematic representation of the present invention.

Fig. 4 d is that the Taper Pipe of Fig. 4 c launches schematic representation (wherein, 21 is that θ, 26 is υ/sin α, is expansion parameter).

Fig. 5 a is the case history grid chart.

Fig. 5 b is the girder system part of Fig. 5 a.

Fig. 5 c is main leg's construction drawing.

Fig. 5 d is Construction of Transition Section figure.

Fig. 5 e is a pipeline section construction drawing.

Fig. 5 f is the waist rail construction drawing.

Fig. 5 g is the peripheral construction drawing of U beam.

Fig. 5 h is rib version construction drawing.

Embodiment

Below by embodiment, and by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.Among the figure, supervisor 1, left cone 2, right cone 3, left arm 4, right arm 5, waist rail 6, U-shaped 7.

Embodiment:

Flat steel bifurcated pipe of the present invention comprises that a left side that supervisor's 1, one end is communicated with supervisor's end of 1 props up the right side that cone 2, one end is communicated with an end of supervisor 1 and prop up cone 3, a described left side and prop up a side of cone 2 and the right side and prop up and bore a side of 3 and recline and be welded and fixed; Left the other end of boring 2 the other ends and right cone 3 is communicated with respectively left arm 4 and right arm 5, and described supervisor 1, a left side cone 2, right bottom of boring 3 left arms 4 and right arm 5 all are positioned at same elevation place.

Wherein, prop up cone 2 and a right side cone 3 on a left side and circumferentially be provided with waist rail 6 with supervisor's 1 connectivity part along being responsible for 1 outer wall; Left cone 2 circumferentially is provided with one U-shaped 7 with right cone 3 places of being welded and fixed; And prop up cone 2 on a left side and also be provided with an interior reinforcement crescent moon floor with right cone 3 place's of being welded and fixed inwalls.

Different from all bifurcated pipe patterns in the past is, require the pipe of each tube coupling at the bottom of elevation identical, an axis of cone is tilted, no longer a level.Supervisor is intersected with a cone, and a cone intersects with arm, as long as guarantee that the radius of public cut is identical, all intersecting lines were plane curve when the pipe pipe intersected, and this fabrication and installation and the stressed of structure to buttress brace all is favourable.

Prop up cone and arm intersection, unbalanced force is less, and buttress brace is not set; Prop up cone and supervisor intersection, section radius is larger, and unbalanced force increases thereupon, and buttress brace constraint localized stress should be set; Two cone intersections are because intersecting line is longer, and it is larger to cut the cross section, and unbalanced force is very large, stretches the steel bifurcated pipe build of crescent shape buttress brace in the reference, stretches crescent shape buttress brace to bear unbalanced force in arranging herein.

The below introduces and is responsible for 1 among the present invention, left cone 2, right cone 3, left arm 4, right arm 5, waist rail 6, U-shaped 7, the making method of interior reinforcement crescent moon floor:

For flat steel bifurcated pipe, the substantially known engineering parameter of this build has 10, is respectively: a left axis of cone line and supervisor's axis angle

A right axis of cone line and supervisor's axis angle

(angle of diverging so is

), supervisor radius R, left arm radius r ₁, right arm radius r ₂, left cone half cone apex angle α ₁, right cone half cone apex angle α ₂, to strengthen deck-siding be that YL, U beam extension are that UL, interior reinforcement crescent moon floor inside protrudent length are that NL(sees accompanying drawing 1a to Fig. 1 d to waist rail).

Intermediate variable and coordinate transformation relation that definition is following:

(1) system of coordinates OXYZ and system of coordinates OX ₂Y ₂Z ₂Transformation relation:

(x ₂,y ₂,z ₂) ^T=T ₁(x,y,z) ^T

Wherein:

$\sin \mathrm{\&lambda;}\frac{\sin \mathrm{\&alpha;}}{\sin r}$

${\mathrm{<figure-callout\; id="1"\; label="T"\; filenames="120924115832.png"\; state="\{\{state\}\}">T</figure-callout>}}_1=\left[\begin{array}{ccc}1& 0& 0\\ 0& \cos \mathrm{\&lambda;}& -\sin \mathrm{\&lambda;}\\ 0& \sin \mathrm{\&lambda;}& \cos \mathrm{\&lambda;}\end{array}\right]$

(2) system of coordinates OX ₁Y ₁Z ₁With system of coordinates OX ₂Y ₂Z ₂Transformation relation:

(x ₁,y ₁,z ₁,) ^T=T ₂(x ₂,y ₂,z ₂,) ^T

Wherein:

$T_2=\left[\begin{array}{ccc}\sin r& -\cos r& 0\\ \cos r& \sin r& 0\\ 0& 0& 1\end{array}\right]$

(3) system of coordinates O ₃X ₃Y ₃Z ₃With system of coordinates OX ₂Y ₂Z ₂Transformation relation:

(x ₂,y ₂,z ₂) ^T=T ₃(x ₃,y ₃,z ₃) ^T+(L,0,0) ^T

Wherein:

$L=\frac{R\sin \mathrm{\&alpha;}}{\cos \mathrm{\&alpha;}+\cos r}$

$\tan \mathrm{\&delta;}\frac{\sin r}{\cos \mathrm{\&alpha;}+\cos r}$

$T_3=\left[\begin{array}{ccc}\cos \mathrm{\&delta;}& -\sin \mathrm{\&delta;}& 0\\ \sin \mathrm{\&delta;}& \cos \mathrm{\&delta;}& 0\\ 0& 0& 1\end{array}\right]$

(4) local coordinate system O ₅X ₅Y ₅Z ₅Conversion relation with the frame of reference:

${(x,y,z)}^T=T_4{(x_5,y_5,z_5)}^T+{(\frac{R\cos \mathrm{\&mu;}}{\sin \mathrm{\&mu;}},0,-R)}^T$

Wherein:

$T_4=\left[\begin{array}{ccc}\cos \mathrm{\&mu;}& 0& \sin \mathrm{\&mu;}\\ 0& 1& 0\\ -\sin \mathrm{\&mu;}& 0& \cos \mathrm{\&mu;}\end{array}\right]$

(5) system of coordinates O ₆X ₆Y ₆Z ₆With system of coordinates O ₅X ₅Y ₅Z ₅Conversion relation:

${(x_5,y_5,z_5)}^T={(x_6,y_6{,z}_6)}^T+{(\frac{-m\sin \mathrm{\&beta;}\cos \mathrm{\&beta;}}{{\cos }^2\mathrm{\&alpha;}-{\sin }^2\mathrm{\&beta;}},\mathrm{0,0})}^T$

Wherein:

Non-symmetry structure (the same symplex structure of basic intermediate variable):

(6) local coordinate system OX4Y4Z4 and frame of reference conversion relation are:

${(x,y,z)}^T=\left[\begin{array}{ccc}\frac{x_a}{\left|{\mathrm{ox}}_4\right|}& \frac{x_b}{\left|{\mathrm{oy}}_4\right|}& \frac{x_c}{\left|{\mathrm{oz}}_4\right|}\\ \frac{y_a}{\left|{\mathrm{ox}}_4\right|}& \frac{y_b}{\left|{\mathrm{oy}}_4\right|}& \frac{y_c}{\left|{\mathrm{oz}}_4\right|}\\ \frac{z_a}{\left|{\mathrm{ox}}_4\right|}& \frac{z_b}{\left|{\mathrm{oy}}_4\right|}& \frac{z_c}{\left|{\mathrm{oz}}_4\right|}\end{array}\right]{(x_4,y_4,z_4)}^T$

Wherein:

$\left|{\mathrm{ox}}_4\right|=\sqrt{{x_a}^2+{y_a}^2+{z_a}^2}$

$\left|{\mathrm{oy}}_4\right|=\sqrt{{x_b}^2+{y_b}^2+{z_b}^2}$

$\left|{\mathrm{oz}}_4\right|=\sqrt{{x_c}^2+{y_c}^2+{z_c}^2}$

(7) local coordinate system OX ₅Y ₅Z ₅With local coordinate system OX ₄Y ₄Z ₄Conversion relation be:

$(x_5,y_5,z_5)=\left[\begin{array}{ccc}\sin \mathrm{\&epsiv;}& \cos \mathrm{\&epsiv;}& 0\\ 0& 0& 1\\ \cos \mathrm{\&epsiv;}& -\sin \mathrm{\&epsiv;}& 0\end{array}\right](x_4,y_4,z_4)$

Wherein:

$\cos \mathrm{\&epsiv;}\frac{\stackrel{\&RightArrow;}{{\mathrm{<figure-callout\; id="1"\; label="op"\; filenames="120924115832.png"\; state="\{\{state\}\}">op</figure-callout>}}_1}\&CenterDot;\stackrel{\&RightArrow;}{{\mathrm{op}}_2}}{\left|\stackrel{\&RightArrow;}{{\mathrm{<figure-callout\; id="1"\; label="op"\; filenames="120924115832.png"\; state="\{\{state\}\}">op</figure-callout>}}_1}\right|\left|\stackrel{\&RightArrow;}{{\mathrm{op}}_2}\right|}$

(8) local coordinate system O ₆X ₆Y ₆Z ₆With local coordinate system O ₅X ₅Y ₅Z ₅Conversion relation is:

$(x_5,y_5,z_5)=\left[\begin{array}{ccc}\cos \mathrm{\&phi;}& 0& -\sin \mathrm{\&phi;}\\ 0& 1& 0\\ \sin \mathrm{\&phi;}& 0& \cos \mathrm{\&phi;}\end{array}\right](x_6,y_6,z_6)+(x_Q,0,z_Q)$

Wherein:

$a=\frac{{\cos \mathrm{\&alpha;}}_2}{\sin \mathrm{\&epsiv;}}(\frac{1}{{\cos \mathrm{\&alpha;}}_1}-\frac{\cos \mathrm{\&epsiv;}}{{\cos \mathrm{\&alpha;}}_2})$

$b=\frac{{R\cos \mathrm{\&alpha;}}_2}{\sin \mathrm{\&epsiv;}}({\tan \mathrm{\&alpha;}}_1-{\tan \mathrm{\&alpha;}}_2)$

$M=(x_M,0,z_M)=(\frac{{R\sin \mathrm{\&alpha;}}_2-{b\tan \mathrm{\&alpha;}}_2}{a-{\tan \mathrm{\&alpha;}}_2}+\frac{R}{{\cos \mathrm{\&alpha;}}_2},0,\frac{R-b\cos {\mathrm{\&alpha;}}_2}{(a\cos {\mathrm{\&alpha;}}_2-\sin {\mathrm{\&alpha;}}_2)})$

$N=(x_N,0,z_N)=(\frac{{R\tan \mathrm{\&alpha;}}_2+{b\sin \mathrm{\&alpha;}}_2}{a{\cos \mathrm{\&alpha;}}_2+{\sin \mathrm{\&alpha;}}_2}-\frac{R}{{\cos \mathrm{\&alpha;}}_2},0,\frac{-R-b\cos {\mathrm{\&alpha;}}_2}{(a\cos {\mathrm{\&alpha;}}_2+\sin {\mathrm{\&alpha;}}_2)})$

$(\frac{x_M+x_N}{2},0,\frac{z_M+Z_N}{2})=(x_Q,0,z_Q)$

$\mathrm{\&phi;}={\tan }^{-1}\frac{z_Q}{x_Q}$

$R^{\&prime;}=(\frac{R}{\sin {\mathrm{\&alpha;}}_2}+z_Q){\tan \mathrm{\&alpha;}}_2$

$\mathrm{CL}=\frac{\left|\mathrm{MN}\right|}{2}\frac{\sqrt{{(z_M-z_N)}^2+{(x_M-x_N)}^2}}{2}$

$\mathrm{DL}=\sqrt{R^{\&prime;2}-{x_Q}^2}$

Then the equation of each several part is as follows if θ is ∈ (0,2 π): (seeing accompanying drawing 3a to Fig. 3 b)

(1) supervisor's equation:

$\left\{\begin{array}{c}{y}_2=R\cos \mathrm{\&theta;}\\ z_2=R\sin \mathrm{\&theta;}\end{array}\right.$

(2) prop up the cone equation:

x ₁ ²+z ₁ ²=(R/cosθ-y ₁tanα) ²

(3) arm equation:

$\left\{\begin{array}{c}{y}_4=r\cos \mathrm{\&theta;}\\ z_4=r\sin \mathrm{\&theta;}\end{array}\right.$

(4) supervisor and a cone intersecting line equation:

$\left\{\begin{array}{c}{x}_2=\frac{R\sin r\cos \mathrm{\&theta;}-R\sin \mathrm{\&alpha;}}{\&PlusMinus;\cos \mathrm{\&alpha;}-\cos r}\\ y_2=R\cos \mathrm{\&theta;}\\ z_2=R\sin \mathrm{\&theta;}\end{array}\right.$

(5) prop up cone and a cone intersecting line equation:

$\left\{\begin{array}{c}{x}_5=\cos \mathrm{\&theta;}(\frac{R}{{\cos \mathrm{\&alpha;}}_2}+z_5{\tan \mathrm{\&alpha;}}_2)\\ y_5=\sin \mathrm{\&theta;}(\frac{R}{{\cos \mathrm{\&alpha;}}_2}+z_5{\tan \mathrm{\&alpha;}}_2)\\ z_5=\frac{{b\cos \mathrm{\&alpha;}}_2-R\cos \mathrm{\&theta;}}{{\cos \mathrm{\&alpha;}}_2({\tan \mathrm{\&alpha;}}_2\cos \mathrm{\&theta;}-a)}\end{array}\right.$

(6) prop up cone and branch pipe intersecting line equation:

$\left\{\begin{array}{c}{x}_4=\frac{{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="120924115832.png"\; state="\{\{state\}\}">r</figure-callout>}}_1\sin \mathrm{\&alpha;}(1+\sin \mathrm{\&theta;})}{2\cos \mathrm{\&alpha;}}\\ y_4={\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="120924115832.png"\; state="\{\{state\}\}">r</figure-callout>}}_1\cos \mathrm{\&theta;}\\ z_4={\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="120924115832.png"\; state="\{\{state\}\}">r</figure-callout>}}_1\sin \mathrm{\&theta;}\end{array}\right.$

(7) the peripheral curvilinear equation of waist rail:

$\left\{\begin{array}{c}{x}_3=0\\ y_3=(\frac{R}{\cos \mathrm{\&delta;}}+\mathrm{YL})\cos \mathrm{\&theta;}\\ z_3=(R+\mathrm{YL})\sin \mathrm{\&theta;}\end{array}\right.$

(8) the peripheral curvilinear equation of U beam:

$\left\{\begin{array}{c}{x}_6=(\mathrm{CL}+\mathrm{UL})\cos \mathrm{\&theta;}\\ y_6=(\mathrm{DL}+\mathrm{UL})\sin \mathrm{\&theta;}\end{array}\right.$

(9) strengthen crescent moon floor inner edge line equation in:

$X_6=\frac{x_6-O_{6}W}{{z_6}^2}{Z_6}^2+\mathrm{CL}-\mathrm{NL}$

Then, cut out suitable shape according to above-mentioned formula at steel plate, then roll into the space tube coupling, weld together and get final product.Buttress brace (U beam and interior reinforcement crescent moon floor) gets final product according to above-mentioned equation line cutting owing to be plane structure, for other spatial structure, owing to be the conical surface of standard, launches according to following technique:

(1) cylinder method of deploying

The parametric equation of cylinder section line is known, and value of every given θ, correspondence obtain on the intersecting line a bit.According to constant this principle of length before and after plain line direction straight line launches on conical surface or the cylndrical surface, can obtain easily the coordinate of a series of corresponding points on the developed curve.For parameter θ, after the assignment, some P space coordinates x _pKnown, during expansion, the X-axis coordinate of some P is constant.Calculate by planimetry, intersecting line was in plane coordinate after supervisor launched:

$\left\{\begin{array}{c}X=x_p-x_o\\ Y=\mathrm{R\&theta;}\end{array}\right.$

(2) circular cone method of deploying

It is known to prop up all equations of cone intersecting line, then for any point P on the intersecting line, establishes the P point and is (x, y) at the coordinate that launches on the plane, then has:

$\left\{\begin{array}{c}X=\mathrm{op}*\cos \mathrm{\&theta;}\\ Y=\mathrm{op}*\sin \mathrm{\&theta;}\end{array}\right.$

Wherein:

op＝v/sinα

θ=usinα

The below is the specific embodiment of using making method of the present invention:

For the flat steel bifurcated pipe of labor structure stress characteristic, according to mechanism characteristics of the present invention, adopt international finite element software ANSYS Modeling Calculation, by a concrete engineering example application of the flat steel bifurcated pipe of Novel asymmetric is analyzed, and tube coupling is launched so that the utilization of Practical Project according to construction process of the present invention.

It is domestic that some hydropower station is positioned at Derong County, Tibetan Autonomous Prefecture of Garze, Sichuan Province, be one-level tributary, left bank, Jinsha jiang River decide Qu He Xiangcheng County, the 8th grade of flourish section cascade development, also for deciding the afterbody of Qu He master stream cascade development.The water channeling type exploitation is adopted in the power station.Two of power station installations, total installation of generating capacity 90MW.

The pivot building owner will be comprised of concrete gate dam, left bank diversion system and shore type ground factory building.The head pivot barrage is comprised of left and right bank checkdam and river-bed section flood discharge sand surfing building.The key construction ranks such as water retaining structure, outlet structure escape works, water diverting structure and Power Plant are 3 grades.Pressure piping adopts the co-supplying mode of a pipe two machines.Be responsible for long 280.0m, internal diameter 4.4m, bifurcated pipe are that symmetrical " Y " shape is arranged, the fork angle is 70 degree; Article two, prop up bore 3.0m, every arm is about 60.0m, supplies water to the unit forward.

In concrete calculating, adopt following design proposal:

Two bifurcated pipe schemes of this water power plant diversion steel bifurcated pipe all adopt 53.5 ° of fork angles, and the rib width ratio is respectively 0.31,0.35, and this engineering two bifurcated pipe builds meet less loss of head, this principle of mechanical characteristic preferably in the reasonable scope substantially.Numerical procedure adopts following scheme:

Its pipe thickness of this scheme all can guarantee bifurcated pipe safety under accidental conditions with the buttress brace size, sees that accompanying drawing 4a is to shown in the accompanying drawing 4d.

From the result of finite element of flat steel bifurcated pipe, the maximum feature stresses value at each position is less than corresponding drag limit value, as: the face maximum Mises stress is 200.3MPa in the shell, less than the permitted value 248MPa of the localized membrane stress of steel; Shell surface peak stress is 247.3MPa, adds the permitted value 273MPa of flexural stress less than the localized membrane stress of steel; The maximum Mises stress of buttress brace is 220.9MPa, less than corresponding topical membrane stress permitted value 231MPa.The build of the flat steel bifurcated pipe of this explanation design is under accidental conditions, and the pipe thickness of bifurcated pipe and U beam size are safe.

The peak-peak stress area of this scheme all appears at the shell top, and size is 247.3MPa, can think that the steel bifurcated pipe does not have obvious region of stress concentration, and this point is very crucial to the application of flat steel bifurcated pipe in engineering.The face maximum stress value all appears at the pipe loin in the shell, namely is responsible for, substantially bores and the Taper Pipe joint, and size is 200.3MPa, and the Novel steel bifurcated pipe is because there is the constraint of waist rail, and facial mask stress is little with the common Steel Y-pipe with Crescent Rib in position in the shell.The integral membrane stress area of shell all appears at supervisor's straight length, and the pipe thickness of flat steel bifurcated pipe supervisor straight length is 30mm, but does not enlarge as Rib Reinforced Bifurcation Pipe, and is therefore stressed more reasonable from stress level steel bifurcated pipe.

In still having adopted, flat steel bifurcated pipe buttress brace stretches the crescent moon floor, it is inboard to stretch Rib Reinforced version maximum cross-section in this scheme buttress brace stress maximum value appears at, size is 220.9MPa, flat steel bifurcated pipe is asymmetric up and down, compare with common Steel Y-pipe with Crescent Rib, flexural stress may increase to some extent, but passes through finite element method (fem) analysis, flexural stress increases and is not serious, can think that Novel steel bifurcated pipe structural type is reasonable.From stress distribution, flat steel bifurcated pipe has the stress concentration phenomenon near primary branch shell intersecting line, and this is similar to common Steel Y-pipe with Crescent Rib; In addition, no matter be that localized membrane stress adds flexural stress or independent localized membrane stress, flat steel bifurcated pipe is all higher at the stress level of pipe loin, and is low and average in comparatively continuous, the whole regional stress level of primary branch.

By analyzing as seen, flat steel bifurcated pipe is stressed evenly rationally, is a kind of feasible novel bifurcated pipe pattern.With traditional comparing such as Steel Y-pipe with Crescent Rib, many variations are arranged on the structure, cancel main leg's transition cone, basic cone, increased waist rail, but owing to set up interior reinforcement crescent moon floor, the waist rail size is relatively much smaller with three beam bifurcated pipes, the problem that does not exist excavated volume to increase, in fact, at the bifurcated pipe position, because the public cut radius of flat steel bifurcated pipe will be far smaller than the public cut radius of Rib Reinforced Bifurcation Pipe, the excavation cross section can reduce on the contrary.

The technique that proposes according to the present invention, the design tube coupling expansion with such scheme can cut out suitable size at steel plate according to design size, rolls into actual steel pipe.For the ease of producing, for the space curve of complexity, provide point coordinates on the curve, will putting during line links to each other gets final product, and sees accompanying drawing 5a to Fig. 5 h.

Expand into example with the main leg:

Specific embodiment described herein only is to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.

Although this paper has more used supervisor 1, left cone 2, right cone 3, left arm 4, right arm 5, waist rail 6, the term such as U-shaped 7, do not get rid of the possibility of using other term.Using these terms only is in order to describe more easily and explain essence of the present invention; They are construed to any additional restriction all is contrary with spirit of the present invention.

Claims (5)

1. flat steel bifurcated pipe, it is characterized in that, comprise that a left side that supervisor (1), an end are communicated with supervisor's (1) a end props up the right side that cone (2), an end be communicated with supervisor's (1) a end and prop up a side of a side that cone (3), a described left side prop up cone (2) and right cone (3) and recline and be welded and fixed; Left the other end of boring (2) the other end and right cone (3) is communicated with respectively left arm (4) and right arm (5), and described supervisor (1), a left side cone (2), right bottom of boring (3) left arm (4) and right arm (5) all are positioned at same elevation place.

2. a kind of flat steel bifurcated pipe according to claim 1 is characterized in that, cone (2) is propped up on a described left side and right cone (3) circumferentially is provided with waist rail (6) with supervisor's (1) connectivity part along supervisor's (1) outer wall.

3. a kind of flat steel bifurcated pipe according to claim 1 is characterized in that, a described left side is propped up cone (2) and circumferentially is provided with one U-shaped (7) with right cone (3) place of being welded and fixed.

4. a kind of flat steel bifurcated pipe according to claim 1 is characterized in that, a described left side is propped up cone (2) and also is provided with an interior reinforcement crescent moon floor with right cone (3) place of being welded and fixed inwall.

5. the manufacture method of a flat steel bifurcated pipe claimed in claim 1 is characterized in that, based on definition: a left axis of cone line and supervisor's axis angle A right axis of cone line and supervisor's axis angle

The angle of then diverging is Supervisor's radius R, left arm radius r ₁, right arm radius r ₂, left cone half cone apex angle α ₁, right cone half cone apex angle α ₂, to strengthen deck-siding be that YL, U beam extension are that UL, interior reinforcement crescent moon floor inside protrudent length are NL to waist rail, cut out required form corresponding to landform at steel plate, then roll into supervisor (1), left cone (2), right cone (3) left arm (4) and right arm (5), weld together, wherein

Described supervisor is based on formula:

$\left\{\begin{array}{c}{y}_2=R\cos \mathrm{\&theta;}\\ z_2=R\sin \mathrm{\&theta;}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation;

Cone is propped up on a described left side and right propping up bored all based on formula:

x ₁ ²+ z ₁ ²=(R/cos θ-y ₁Tan α) ², wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, α props up cone for a left side and represents α ₁, prop up cone for the right side and represent α ₂

Described left arm and right arm are all based on formula:

$\left\{\begin{array}{c}{y}_4=r\cos \mathrm{\&theta;}\\ z_4=r\sin \mathrm{\&theta;}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation;

Described supervisor bores the intersecting line equation all based on formula with the left cone that props up with right:

$\left\{\begin{array}{c}{x}_2=\frac{R\sin r\cos \mathrm{\&theta;}-R\sin \mathrm{\&alpha;}}{\&PlusMinus;\cos \mathrm{\&alpha;}-\cos r}\\ y_2=R\cos \mathrm{\&theta;}\\ z_2=R\sin \mathrm{\&theta;}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and r is intermediate variable;

Cone and right cone intersecting line are propped up based on formula in a described left side:

$\left\{\begin{array}{c}{x}_5=\cos \mathrm{\&theta;}(\frac{R}{{\cos \mathrm{\&alpha;}}_2}+z_5{\tan \mathrm{\&alpha;}}_2)\\ y_5=\sin \mathrm{\&theta;}(\frac{R}{{\cos \mathrm{\&alpha;}}_2}+z_5{\tan \mathrm{\&alpha;}}_2)\\ z_5=\frac{{b\cos \mathrm{\&alpha;}}_2-R\cos \mathrm{\&theta;}}{{\cos \mathrm{\&alpha;}}_2({\tan \mathrm{\&alpha;}}_2\cos \mathrm{\&theta;}-a)}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and a, b are intermediate variable;

Cone and left arm and right cone and right branch pipe intersecting line are propped up based on formula in a described left side:

$\left\{\begin{array}{c}{x}_4=\frac{r_1\sin \mathrm{\&alpha;}(1+\sin \mathrm{\&theta;})}{2\cos \mathrm{\&alpha;}}\\ y_4=r_1\cos \mathrm{\&theta;}\\ z_4=r_1\sin \mathrm{\&theta;}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and α props up cone for a left side and represents α ₁, prop up cone for the right side and represent α ₂

The peripheral curve of described waist rail is based on formula:

$\left\{\begin{array}{c}{x}_3=0\\ y_3=(\frac{R}{\cos \mathrm{\&delta;}}+\mathrm{YL})\cos \mathrm{\&theta;}\\ z_3=(R+\mathrm{YL})\sin \mathrm{\&theta;}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and δ is intermediate variable;

The peripheral curve of described U-shaped beam is based on formula:

$\left\{\begin{array}{c}{x}_6=(\mathrm{CL}+\mathrm{UL})\cos \mathrm{\&theta;}\\ y_6=(\mathrm{DL}+\mathrm{UL})\sin \mathrm{\&theta;}\end{array}\right.,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and CL, DL are intermediate variable;

Described interior reinforcement crescent moon floor inner edge line is based on formula:

$X_6=\frac{x_6-O_{6}W}{{z_6}^2}{Z_6}^2+\mathrm{CL}-\mathrm{NL},,$ Wherein, θ ∈ (0,2 π) is the basic known variables of parametric equation, and CL, DL are intermediate variable.

Images