CN202282327U - Novel U-shaped tube - Google Patents

Abstract

The present utility model aims to provide a U-shaped tube which is simple in structure and has high intensity in a bending part. The novel U-shaped tube comprises a straight tube part and the bending part, especially the outer caliber of the bending part is less than the outer caliber of the straight tube part, the inner caliber of the bending part is less than the inner caliber of the straight tube part, and a transitional part for fitting caliber is arranged between the bending part and the straight tube part. In the tube, costs are not increased, the mechanical strength is high, and the luminescence efficiency is high; the tube can be used for making common fluorescent lamps or ultraviolet lamps; and the tube is also suitable to be bridged into a 2U tube by a bridging machine, and the application scope is wide.

Description

A kind of novel U-shaped fluorescent tube

Technical field

The utility model relates to a kind of general lighting and uses fluorescent lamp tube.

Background technology

To shown in Figure 3, existing U-shaped fluorescent lamp tube or quartz burner are normally formed by straight tube bending like Fig. 1.Because behind the straight tube bending, the wall thickness in the outside of its crooked position can be drawn thin, explosion easily, thereby qualification rate is extremely low when producing such U-shaped fluorescent tube.For improving the qualification rate of product, promote the intensity of fluorescent tube, need make improvements.

The utility model content

The utility model aims to provide a kind of simple in structure, the U-shaped fluorescent tube that crooked position intensity is high.

Technical scheme below adopting:

A kind of novel U-shaped fluorescent tube comprises straight sections and bend; Especially, the outer tube diameter of said bend is less than the outer tube diameter of said straight sections; The interior caliber of said bend is less than the interior caliber of said straight sections; Between bend and straight sections, also be provided with and be used to carry out the adaptive transition part of caliber.

Transition part makes and can cross along slipping between bend that caliber is different and the straight sections, thereby improves the bonding strength between bend and the straight sections, avoids producing stress and concentrates.The outer tube diameter of bend and interior caliber are all less; Therefore when using the equivalent material; The wall thickness of the bend of the utility model can make thicker than the wall thickness of the bend of existing fluorescent tube, thereby under the prerequisite that does not increase material cost, has improved the mechanical strength of bend, avoids breaking.In addition, all less bend of outer tube diameter and interior caliber also can make at the transition part place and produce a cold junction, to improve the luminous efficiency of fluorescent lamp.Generally speaking, the external diameter of straight sections and bent portion is than between 1: 0.65 to 1: 0.85, and the internal diameter of straight sections and bent portion so both can obtain wall thickness fluorescent tube product relatively uniformly than between 1: 0.6 to 1: 0.8, can make transition part be easy to form again.

The utlity model has does not increase cost, high, the luminous efficiency advantages of higher of mechanical strength, can be used for the making of conventional fluorescent lamps or ultra-violet lamp, and being equally applicable to becomes the 2U fluorescent tube with bridge joint machine bridge joint, applied widely.

Description of drawings

Fig. 1 is the front view of existing fluorescent tube;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the upward view of Fig. 1;

Fig. 4 is the front view of embodiment;

Fig. 5 is the left view of Fig. 4;

Fig. 6 is the upward view of Fig. 4;

Fig. 7 is the stereogram of embodiment.

Description of reference numerals: 1-straight sections; The 2-bend; The 3-transition part.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model content is described further.

To shown in Figure 7, the U-shaped fluorescent tube of present embodiment comprises straight sections 1 and bend 2 like Fig. 4.The outer tube diameter of bend 2 is: 14.4 ± 0.5mm, the outer tube diameter of straight sections 1 is: 19.9 ± 0.5mm.The interior caliber of bend 2 is: 12.6 ± 0.5mm, the interior caliber of straight sections 1 is: 18.1 ± 0.5mm.Between bend 2 and straight sections 1, also be provided with and be used to carry out the adaptive transition part of caliber 3.

The preferred embodiments that is merely the utility model of this specification lists, the equivalent technologies conversion of being done under all operation principle and thinkings at the utility model all is regarded as the protection range of the utility model.

Claims (3)

1. a novel U-shaped fluorescent tube comprises straight sections and bend; It is characterized in that: the outer tube diameter of said bend is less than the outer tube diameter of said straight sections; The interior caliber of said bend is less than the interior caliber of said straight sections; Between bend and straight sections, also be provided with and be used to carry out the adaptive transition part of caliber.

2. a kind of novel U-shaped fluorescent tube as claimed in claim 1 is characterized in that: the external diameter of straight sections and bent portion is than between 1: 0.65 to 1: 0.85.

3. a kind of novel U-shaped fluorescent tube as claimed in claim 1 is characterized in that: the internal diameter of straight sections and bent portion is than between 1: 0.6 to 1: 0.8.

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