CN2111423U - Wind pipe - Google Patents

Abstract

The utility model discloses a wind pipe which is a metal pipe and a pipe joint used for a ventilating pipe. The cross section of the wind pipe presents a circle-like shape which is formed by the two sides of a rectangle respectively butt with a semicircular shape. Thus, the height direction of the wind pipe whose cross section presents a circle like shape is small, and the occupying space height is small, with better strength than a rectangular tube. The utility model can form a screw wound biting edge to ensure the strength of the wind pipe preventing wind pressure.

Description

Wind pipe

Airduct is a kind of ventilation duct metal tube and pipe joint of being used for.

Pipe and pipe joint that existing ventilation duct is adopted all are circle and rectangle.Though the pipe of circular cross-section and joint intensity are good, can adopt than the light wall pipe wall, but bigger with the caliber in cross section, it is more to occupy the space.Particularly in limited space, on warship, it is bigger to occupy spatial altitude.Though the pipe of rectangular cross-section and joint caliber in the cross section is less, it is less to occupy the space, as occupying width limitations for certain direction hour, can be made into the rectangular cross section and guarantees sectional area, and rectangular section tube and joint strength are lower.This just requires tube wall thicker, and materials are many, and weight is big.For rectangular section tube and joint, it is very difficult being made into helically coiling engagement reinforced structure, and very easy in the place's jackknifing of rectangle knuckle.

The purpose of this utility model be to provide a kind of take up space highly less, again the airduct of higher-strength arranged.

The utility model airduct structural feature is that the airduct cross section is oblateness, i.e. the shape that is formed by each butt joint semicircle of rectangle both sides.Oblate airduct short transverse is less, and institute's spatial altitude of occupying is less, and can guarantee the sectional area of ventilation duct.Than all little with the circular pipe in cross section, spatial altitude that square tubular is occupied.Simultaneously, pipe width direction semicircular in shape can guarantee higher anti-ventilation pressure intensity of force again.The utility model airduct comprises pipe and pipe joint, as elbow, threeway and how logical, reducer fitting.For the airduct made from thin plate, because the cross section is oblate, but there is not knuckle the utility model airduct helically coiling seaming, oblate wind pipe wall is the seaming stiffening rib in the shape of a spiral.Can adopt thin thin plate like this, save materials, further increase the intensity of Wind-Pressure Resistance.Compare with the rectangular air duct with the cross section, oblate airduct also has less windage.

The utility model airduct also can be made into thermal insulation wind pipe, be at the oblate pipe of oblate airduct overcoat one deck, forming big or small oblate pipe box connects, two ends accompany seal ring between two tube walls, form the thermal insulation wind pipe of air adiabatic, perhaps between two oblate pipes, press from both sides thermal insulation layer, form the higher adiabatic heat-insulation airduct of heat insulating ability.Can have the protruding stiffening rib of a circle in oblate blast connection section, promptly the intensity of reinforcement tube is convenient to the socket location again.

The utility model airduct compared with the prior art, it is less to have a spatial altitude of occupying, the wind pressure resistant strength advantage of higher.Save raw material simultaneously, reduce the material user cost, less flowing resistance is arranged, and can conveniently form thermal insulation wind pipe, be specially adapted to certain direction of space and occupy the less condition of size requirement.

Accompanying drawing has represented to be used for the utility model airduct schematic representation on the warship, and Fig. 1 represents a kind of straight airduct, and Fig. 2 has represented the straight airduct of the insulation that is nested, and Fig. 3 has represented three ventilation ducts, and Fig. 4 represents insulation three ventilation ducts that are nested.

Further specify the utility model airduct below in conjunction with the accompanying drawing example.It is oblate that the cross section of this straight airduct is, and the cross section middle part is square, and both sides are the semicircle that diameter equals the square length of side.The height that this oblate airduct is occupied is with the homalographic pipe

$\sqrt{\frac{\mathrm{\π}}{\mathrm{\π}+4}}$

。This oblate airduct side face has spiral seaming 1, strengthens the airduct rated wind velocity.The stiffening rib that the spiral seaming forms, 110mm at interval.Though adopt 0.6mm thickness zinc-iron plate, and make square airduct with 0.75mm thickness zinc-iron plate, this oblate airduct intensity is more much better than than square airduct.During with the same hydrostatic test, square airduct is heaved 5mm, and this oblate airduct is only heaved 3.5mm

The oblate airduct 2,3 that differs 10mm with above-mentioned two kinds of calibers is nested, and between accompanies adiabator layer, accompanies the rubber sleeve seal ring between the two ends.Form the straight airduct of insulation.

It is oblate that this three ventilation ducts, cross section are, and the cross section middle part is rectangle, and both sides are that diameter equals the long semicircle of rectangular minor face.Each junction of three ventilation ducts has the stiffening rib 4 of a circle projection.Outside this three ventilation ducts, overlap oblate three ventilation ducts of the bigger 10mm of caliber again, accompany thermal insulation layer between the two, accompany colloid seal ring 5 in the joint between the two, form adiabatic insulation three ventilation ducts that are nested.

Claims (4)

1, airduct is pipe and the pipe joint that is used for ventilation duct, it is characterized in that managing cross section rectangular both sides butt joint semicircle and the oblateness that forms.

2, according to the said airduct of claim 1, it is characterized in that: oblate wind pipe wall is the seaming stiffening rib in the shape of a spiral.

3, according to claim 1 or 2 said airducts, it is characterized in that: oblate wind pipe wall overcoat one oblate pipe, two ends accompany seal ring between two tube walls.

4, according to the said airduct of claim 1, it is characterized in that: oblate blast connection section has the stiffening rib of a circle projection.

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