CN103559359B - A transformer angle rising seat barrel method of deploying - Google Patents

Abstract

The present invention relates to an a kind of transformer angle rising seat barrel method of deploying, belong to transformer panel beating technical field. Technical scheme is: the axial length of any expanded position of barrel equals in expanded position barrel inner side edge and barrel outer side edges compared with the length of minor face; In the time that barrel inner side edge length equals barrel outer side edges, the axial length of expanded position equals the length on any one side. The true form of barrel section is MQPF rectangle, occurs Δ H error vertically, and MQPF rectangle axial length only need deduct Δ H so. Good effect of the present invention: according to actual barrel blanking processing, realize the accurate expansion to angle rising seat barrel, pass through at work application verification, solve that local contact appears in barrel angle end when docking and the problem in gap appears in other position, be conducive to welding operation and improved welding quality, ensured the actual height of rising seat barrel.

Description

A transformer angle rising seat barrel method of deploying

Technical field

The present invention relates to an a kind of transformer angle rising seat barrel method of deploying, belong to transformer panel beating technical field.

Background technology

The seat that raises is a vitals of oil tank of transformer, and wherein angle seat barrel (hereinafter to be referred as the barrel) shape that raises is shown in Fig. 1, Fig. 2, one end band angle and be plane, and angle end inclination angle is α, is to roll and form after plate cutting by barrel expanded view. Conventionally Design spreading figure is the neutral line expanded view of barrel, and be plotted in XOY plane, developed curve is the expansion shape of barrel neutral line and angle transverse plane intersection, on curve, the X-axis coordinate of any point is the neutral line arc length from the initial expanded position of barrel to expanded position, and Y-axis coordinate is expanded position neutral line axial length. The ideal profile shape that obtains barrel by above-mentioned expanded view should be as Fig. 4, for MCEF trapezoidal. In figure, GD is neutral line length, and α ＇ is cut surface CE and plate face angle, changes along the axial diverse location α of barrel ＇, can release α and α ＇ close and be according to geometrical relationship:

ctg(α＇)+ctg(α)×cos(θ)=0

θ is the angle of barrel expanded position and the initial expanded position of barrel (0B in Fig. 5).

But cannot process such inclination angle along thickness of slab direction when actual blanking, the actual angle of plate face and cut surface is 90 °, so barrel section shape is MQPF rectangle, as can be seen from the figure had more a triangle DPE region, this increases PE vertically can cause barrel assembling time, its value is for Δ H, in different positions

Δ H=│ 0.5 × t × ctg (α) × cos (θ) │ (this formula is got derivation in 0.5 o'clock by neutral line coefficient).

Can find out from formula, due to plate cutting processing, have axial error by the barrel angle end position of neutral line expanded view processing, and be different at different expanded position axial errors, in the time of θ=0 or π, Δ H=0.5 × t × ctg (α), is maximum; In the time of θ=0.5 π or 1.5 π, Δ H=0, is minimum of a value. Due to the reason of plate cutting processing, there is axial error by the barrel angle end position of neutral line expanded view processing, and be different at different expanded position axial errors, axial error can cause barrel angle end and mating surface to produce local contact, there is gap in other position, causes welding difficulty, easily occurs problems of welded quality.

Summary of the invention

The object of this invention is to provide an a kind of transformer angle rising seat barrel method of deploying, avoid existing axial error, can not exert an influence to the blanking of power transformer enclosure barrel and follow-up welding, increase work efficiency and welding quality, solve the problems referred to above that background technology exists.

Technical scheme of the present invention is: an a kind of transformer angle rising seat barrel method of deploying, comprise following steps: due to barrel plate cutting reason, the true form of barrel section is MQPF rectangle, there is Δ H error vertically, MQPF rectangle axial length deducts Δ H, barrel section shape is MNEF rectangle, the axial length of rectangle MNEF equals barrel ideal profile inner side edge, hereinafter to be referred as barrel inner side edge FE length, be less than barrel ideal profile outer side edges, hereinafter to be referred as barrel outer side edges MC length; Now, 90 ° of cut surface CE and plate face angle α ＇ <, when also there will be the situation of 90 ° of α ＇ > and α ＇=90 ° in the time that barrel axially dissects; In the time of 90 ° of α ＇ >, for fear of occurring that height error barrel section shape should be MNEF rectangular shape, its axial length equals barrel outer side edges length, and its length is less than barrel inner side edge length; In the time of α ＇=90 °, there is not height error in barrel section shape, because the length of side outside barrel equals the length of side inside barrel, therefore its axial length equals the length on any one side; The axial length of any expanded position of barrel equals in expanded position barrel inner side edge and barrel outer side edges compared with the length of minor face; In the time that barrel inner side edge length equals barrel outer side edges, the axial length of expanded position equals the length on any one side:

If the length of barrel inner side edge is y1, the length of barrel outer side edges is y2, and computing formula is:

y1=H－(D／2)×cos(θ)×ctg(α)

y2=H－(D／2－t)×cos(θ)×ctg(α)

In upper two formulas: D is barrel external diameter, the mm of unit;

T is barrel thickness, the mm of unit;

θ is the angle of expanded position and initial expanded position, the rad of unit;

α is angle end inclination angle, the rad of unit;

H is that barrel upper surface is to splay end mouth centre distance, the mm of unit.

Smaller in y1, y2 is made as to y, y=min(y1, y2), as the axial length of expanded position, in XOY coordinate system as Y-axis coordinate.

Be made as x from initial expanded position to the arc length of expanded position neutral line, computing formula is:

x=(D－2×t＋2×t×k)×θ

In formula: D is barrel external diameter, the mm of unit;

T is barrel thickness, the mm of unit;

K is neutral line coefficient;

θ is the angle of expanded position and initial expanded position, the rad of unit.

So just, obtained the coordinate points (x, y) of expanded position angle end; Obtain multiple coordinate points by said method, utilize the point obtaining just can draw the developed curve of barrel angle end, thereby draw out barrel expanded view.

Good effect of the present invention: according to actual barrel blanking processing, realize the accurate expansion to angle rising seat barrel, pass through at work application verification, solve that local contact appears in barrel angle end when docking and the problem in gap appears in other position, be conducive to welding operation and improved welding quality, ensured the actual height of rising seat barrel.

Brief description of the drawings

Fig. 1 is a background technology transformer angle rising seat barrel front view;

Fig. 2 is a background technology transformer angle rising seat barrel top view;

Fig. 3 is that transformer angle rising seat barrel of the present invention launches a front view;

Fig. 4 is a transformer angle rising seat barrel A-A cutaway view of the present invention;

Fig. 5 is a transformer angle rising seat barrel top view of the present invention;

Fig. 6 is 90 ° of expanded position generalized sections of α ＇ >;

Fig. 7 is α ＇=90 ° expanded position generalized sections;

Fig. 8 is the raise interface of seat unfolding calculation software of the angle developed according to the present invention;

Fig. 9 is the result example of by software shown in accompanying drawing 8, angle rising seat barrel being carried out unfolding calculation.

Detailed description of the invention

Below in conjunction with accompanying drawing, by embodiment, the present invention will be further described.

With reference to accompanying drawing 4,5, due to barrel plate cutting reason, the true form of barrel section is MQPF rectangle, there is Δ H error vertically, MQPF rectangle axial length only need deduct Δ H so, has so just solved the problems referred to above, and barrel section shape is MNEF rectangular shape, the axial length of rectangle MNEF equals barrel ideal profile inner side edge (hereinafter to be referred as barrel inner side edge) FE length, is less than barrel ideal profile outer side edges (hereinafter to be referred as barrel outer side edges) MC length. We notice, now 90 ° of α ＇ <, when also there will be the situation of 90 ° of α ＇ > and α ＇=90 ° in the time that barrel axially dissects; In the time of 90 ° of α ＇ >, as Fig. 6, for fear of occurring that height error barrel section shape should be MNEF rectangular shape, its axial length equals barrel outer side edges length, and its length is less than barrel inner side edge length; In the time of α ＇=90 °, as Fig. 7, there is not height error in barrel section shape, because the length of side outside barrel equals the length of side inside barrel, therefore its axial length equals the length on any one side.

Analysis by above three kinds of situations is known, and the axial length of any expanded position of barrel equals in expanded position barrel inner side edge and barrel outer side edges compared with the length of minor face; In the time that barrel inner side edge length equals barrel outer side edges, the axial length of expanded position equals the length on any one side.

If the length of barrel inner side edge is y1, the length of barrel outer side edges is y2, and computing formula is:

y1=H－(D／2)×cos(θ)×ctg(α)

y2=H－(D／2－t)×cos(θ)×ctg(α)

In upper two formulas: D is barrel external diameter, the mm of unit;

T is barrel thickness, the mm of unit;

θ is the angle of expanded position and initial expanded position, the rad of unit;

α is angle end inclination angle, the rad of unit;

H is that barrel upper surface is to splay end mouth centre distance, the mm of unit.

Smaller in y1, y2 is made as to y, y=min(y1, y2), as the axial length of expanded position, in XOY coordinate system as Y-axis coordinate.

Be made as x from initial expanded position to the arc length of expanded position neutral line, computing formula is:

x=(D－2×t＋2×t×k)×θ

In formula: D is barrel external diameter, the mm of unit;

T is barrel thickness, the mm of unit;

K is neutral line coefficient;

θ is the angle of expanded position and initial expanded position, the rad of unit.

So just, obtained the coordinate points (x, y) of expanded position angle end. Can obtain multiple coordinate points by said method, utilize the point obtaining just can draw the developed curve of barrel angle end, thereby draw out barrel expanded view.

With reference to accompanying drawing 8,9, according to the inventive method, utilize CAD platform and its VBA secondary development environment providing to carry out software development, realize the automatic calculating that barrel is launched, drafting and the mark of displaypattern. Software interface is shown in Fig. 8, launches example and sees Fig. 9. The present invention is according to actual barrel baiting processing method, realize the accurate expansion to angle rising seat barrel, at work through application verification for many years, solve that local contact appears in barrel angle end when docking and the problem in gap appears in other position, be conducive to welding operation and improved welding quality, ensured the actual height of rising seat barrel.

Claims (1)

1. a transformer angle rising seat barrel method of deploying, it is characterized in that comprising following steps: the true form of barrel section is MQPF rectangle, there is Δ H error vertically, MQPF rectangle axial length deducts Δ H, barrel section shape is MNEF rectangle, and the axial length of rectangle MNEF equals barrel ideal profile inner side edge, hereinafter to be referred as barrel inner side edge FE length, be less than barrel ideal profile outer side edges, hereinafter to be referred as barrel outer side edges MC length; Now, 90 ° of cut surface CE and plate face angle α ＇ <, when also there will be the situation of 90 ° of α ＇ > and α ＇=90 ° in the time that barrel axially dissects; In the time of 90 ° of α ＇ >, for fear of occurring that height error barrel section shape should be MNEF rectangular shape, its axial length equals barrel outer side edges length, and its length is less than barrel inner side edge length; In the time of α ＇=90 °, there is not height error in barrel section shape, because the length of side outside barrel equals the length of side inside barrel, therefore its axial length equals the length on any one side; The axial length of any expanded position of barrel equals in expanded position barrel inner side edge and barrel outer side edges compared with the length of minor face; In the time that barrel inner side edge length equals barrel outer side edges, the axial length of expanded position equals the length on any one side:

If the length of barrel inner side edge is y1, the length of barrel outer side edges is y2, and computing formula is:

y1=H－(D／2)×cos(θ)×ctg(α)

y2=H－(D／2－t)×cos(θ)×ctg(α)

In upper two formulas: D is barrel external diameter, the mm of unit;

T is barrel thickness, the mm of unit;

θ is the angle of expanded position and initial expanded position, the rad of unit;

α is angle end inclination angle, the rad of unit;

H is that barrel upper surface is to splay end mouth centre distance, the mm of unit;

Smaller in y1, y2 is made as to y, y=min(y1, y2), as the axial length of expanded position, in XOY coordinate system as Y-axis coordinate;

Be made as x from initial expanded position to the arc length of expanded position neutral line, computing formula is:

x=(D－2×t＋2×t×k)×θ

In formula: D is barrel external diameter, the mm of unit;

T is barrel thickness, the mm of unit;

K is neutral line coefficient;

θ is the angle of expanded position and initial expanded position, the rad of unit;

So just, obtained the coordinate points (x, y) of expanded position angle end; Obtain multiple coordinate points by said method, utilize the point obtaining to draw the developed curve of barrel angle end, thereby draw out barrel expanded view.