Cosmetic sterile workshop ventilation system connecting pipe fittings

Cosmetic sterile pharmaceutical cleanroom ventilation system connecting pipe fittings

Cosmetic sterile workshop ventilation system connecting pipe fittings:

Tianyuan place is used for the connection between ventilation ducts and ventilators, air conditioners, air heaters and other equipment, and the connection of air ducts from a circular section to a rectangular section.

1. The expansion of the center of the sky and the round place

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Text label: Cosmetic sterile workshop pipe fittings, cosmetic pharmaceutical cleanroom ventilation system

Cosmetic sterile pharmaceutical cleanroom ventilation system connecting pipe fittings

Cosmetic sterile workshop ventilation system connecting pipe fittings:

Tianyuan place is used for the connection between ventilation ducts and ventilators, air conditioners, air heaters and other equipment, and the connection of air ducts from a circular section to a rectangular section.

1. The expansion of the center of the sky and the round place

There are many expansion methods for the center of the sky and the circle. It can be expanded by the triangle method, the approximate cone method and the intersection wheel and circle method.

(1) Triangle method expansion

According to the known diameter D of the round pipe, the pipe side dimensions A-B, B-C and height h of the rectangular air duct, draw the front view and top view, and number the circular nozzles in the top view equally.

Use the right-angle trigonometry method to find the solid long line of each ridge line. The E-1 ridge line in the top view is the interface of the sky circle. In fact, the long line has directly reflected the main view. solid line.

Draw the expansion diagram using the triangle method, first draw the line segment E-A as (A-D)/2, take point E as the center, draw an arc with the real length of E-1 as the radius, and draw the arc with point A as the center and the real length of b as the radius The intersection of the drawn arcs is 1 point; then draw the arc with point 1 as the center and the arc length of 1-2 as the radius, and draw the arc with point A as the center and the real length of b as the radius to draw the arc to intersect at 2 points. By analogy, after connecting the intersection points, it is the expanded map of the sky and the circle.

(2) Approximate cone method expansion

According to the known diameter D of the circular duct, the dimensions of the side of the rectangular duct A, B and the height h, intercepting ab on a straight line is equal to the perimeter of the rectangular duct divided by π [2(A+B)/c] . Draw a vertical line through the midpoint of ab, intercept the height h of the celestial circle on this vertical line, and draw cd equal to the diameter D of the circular tube, connect ac, bd and extend and intersect at point O; then take point O as the center, respectively Take Oa and Oc as the radii, draw an arc; on the bottom arc, take the lengths of the sides of A and B to intercept the arcs in turn, the arc lengths are A, B, A, B, and divide A into two equal parts, Put them on both sides, get points 1, 2, 3, 4, 5, 6, connect 1-O and 1-6, and intersect with the upper arc at points 7 and 8. Arcs 7 and 8 are the sky circle and the place circle. The expansion of the mouth, its length should be equal to πD.

It is relatively simple to use this unfolding method. The size of the round mouth and the square mouth is correct, but it can also be clearly seen that the height is slightly smaller than the specified height. Generally, it can be corrected on the short straight pipe with the extended flange.

(3) Intersection wheel circle method expansion

According to the known diameter D of the round pipe, the size and height of the side of the rectangular air duct, draw the front view and top view, and divide the diameter of the round pipe into equal parts to draw the ridges; use the right triangle method to find 1-A, 2 -A's solid long line.

When drawing an expanded view, first make a right angle 1EA, so that the length of 1-E is e on the main view, and the length of E-A is E-A (1/2AD) on the top view; with point A as the center, 2-A The solid long line is the radius to draw an arc, and the arc is drawn with point 1 as the center and the radius 1-2 in the top view is drawn to intersect at point 2, and the extended line segments E-1 and A-2 intersect at point O; then point O is the center of the circle , O-2, O-A are the radii to draw concentric arcs respectively; 1-2, 2-3... 2-1 is intercepted on the inner circumference as the circumference of the pipe; As the center of the circle, D-E in the top view is the radius to draw an arc, and the arc is drawn with the O point as the center, O-E as the radius, and the arc intersects at the E point, and the connected points are the expansion diagram of the sky circle.

2. The expansion of the eccentric sky and round place

For the expansion of the eccentric sky and circle, the triangle method is usually used. According to the known diameter of the circular pipe, the pipe edge, height and eccentric distance of the rectangular air duct, draw the front view and the top view. Divide the semicircle into points 1, 2, 3, 4, 5, 6, and 7 on the top view, and connect each point to E, A, B, and F of the bottom of the rectangle, and find each edge according to the right-angled triangle method. The actual length of the line.

Intercept the real length of E1 equal to E-1 on a straight line, take the real length of the line length EA and 1-A as the radius, take the two points E and 1 as the center respectively, and draw the arc to intersect at point A; The real length of -2 and the chord length of 1-2 are the radius, the two points A and 1 are respectively the center of the circle, and the arc is drawn to intersect at point 2; the same method is used to determine points 3 and 4, and the real length of AB line and 4-B are used. The length is the radius, with A and 4 as the center of the circle, and the arc is drawn to intersect at B; the chord length of 4-5 and the real length of 5-B are the radius, respectively, with the two points of 4 and B as the center of the circle, and the arc is drawn to intersect at B. Point 5 is the same as that of points 6 and 7, with the real length of 7-F and the line length of BF as the radius, and the two points 7 and B as the center of the circle, respectively, and draw an arc to intersect at point F. After connecting the points, the expanded map of the eccentric sky (half) is obtained. Zhongjing Global Purification can provide consulting, planning, design, construction, installation and transformation of sterile workshops and clean workshops and other supporting services.

After the Tianyuan area is unfolded, the bite allowance and flange allowance should be released. The Tianyuan area can be made of one sheet, or it can be divided into two or four sheets. After taking the bite, it should be placed in the Corresponding ridges are raised on the channel steel edge of the workbench, and then the bite is hooked and firmed, and then rounded and flattened.

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