CN200972017Y - Reinforced, unreinforced joint U-shaped variable rigidity metal corrugated pipe - Google Patents

Abstract

The utility model discloses a reinforced or non reinforced combination U shape variable rigidity metal corrugated pipe, which is characterized in that: one or more corrugation on a plurality of corrugation of a corrugated pipe near two ends adopts a reinforced U shape corrugated pipe (1), while the middle corrugation adopts the non reinforced U shape corrugated pipe (2); in this way, the variable rigidity is possessed, further improving the compensation and vibration and noise reduction performance of the metal corrugated pipe, and satisfying the daily improvement requirement of the pipeline compensation and vibration and noise reduction performance.

Description

A kind of reinforcement, do not have the U type that cements union and become the rigidity metal bellows

Technical field:

The utility model relates to metal bellows compensation and vibration and noise reducing structure and the device technique field that is applied to pipeline fittings, especially a kind of reinforcement, does not have the U type change rigidity metal bellows that cements union.

Background technique:

Metal bellows is as pipeline fittings, be widely used in the various pipelines of oil, chemical industry, metallurgy, heat supply and ship power system, its flexible element has the displacement of absorption and vibration and noise reducing performance, with the dimensional changes of suction line and the vibration transfer of cutting down pipeline and equipment.At present, as the metal bellows of pipeline fittings, be generally on many ripples of a bellows both at home and abroad, or all adopt and strengthen the U type, or all adopt and do not have the U of reinforcement type, and have certain rigidity.All adopt reinforcement U type or whole the employing not to have the metal bellows of strengthening the U type, under conditions such as the bearing capacity that guarantees bellows, stability, fatigue behaviour, bit shift compensation that it had and vibration and noise reducing performance only can satisfy the requirement of oil, chemical industry, metallurgy, heating system pipeline, occasion to the spatial requirement strictness, as the inlet/outlet of modern ships manufacturing technology, various pumps, but can not satisfy the requirement that equipment and compensation of pipeline and vibration and noise reducing performance are improved day by day.

Summary of the invention:

For solving the defective that prior art exists, the purpose of this utility model provides a kind of reinforcement, does not have the U type change rigidity metal bellows that cements union, it adopts reinforcement, does not have the U type change rigidity metal bellows that cements union, had the advantages that to become rigidity, further improve the compensation and the vibration and noise reducing performance of metal bellows, satisfy the requirement that compensation of pipeline and vibration and noise reducing performance improve day by day.

For achieving the above object, the utility model adopts following technological scheme:

Described a kind of reinforcement, do not have the U type that cements union and become the rigidity metal bellows, it adopts near (or a plurality of) ripple at two ends and to strengthen U type bellows on many ripples of a bellows, and intermediate wave adopts does not have the U of reinforcement type bellows.

Owing to adopted technique scheme, the utlity model has following superiority:

The utility model combines reinforcement, does not have the advantage of strengthening two kinds of bellowss, and formed the advantage of self uniqueness, improved the column stability energy of bellows, in limited space, increased the unstability wave number of bellows, improve the compensation ability of bellows, reduced the rigidity of bellows, improved the vibration and noise reducing performance of bellows.With the reinforcement of isostructure parameter or do not have the U of reinforcement type metal bellows and compare, compensation ability improves 1.2～1.8 times, and the vibration and noise reducing performance can improve more than 3～5dB.

Description of drawings:

Fig. 1 is this reinforcement, do not have the U type that cements union becomes rigidity metal bellows structural representation;

Shown in Fig. 1: 1-strengthens U type bellows; 2-does not have the U of reinforcement type bellows.

Embodiment:

As shown in Figure 1, a kind of reinforcement, do not have the U type that cements union and become the rigidity metal bellows, on many ripples of a bellows, (or a plurality of) ripple near two ends adopts reinforcement U type bellows (1), and its intermediate wave adopts nothing to strengthen U type bellows (2), form a kind of reinforcement, do not have the novel bellows of U type that cements union, and have the advantages that to become rigidity.

Bellows structure pattern and waveform parameter see Table 1,

Displacement compensation capability and mean rigidity result of calculation see Table 2,

Table 1 bellows structure pattern and waveform parameter

The bellows pattern	Ripple root diameter	Wave height	The pitch of waves	The number of plies	Thickness	Wave number	The bellows material
								There is not the U-shaped of reinforcement bellows	219	26	30	4	0.5	5	304
Strengthen, do not have the U type that cements union and become the rigidity metal bellows	219	26	30	4	0.5	4+5	304

Table 2 bellows compensation ability and mean rigidity

The bellows pattern	Compensation ability (mm)	Mean rigidity (N/mm)
			There is not the U-shaped of reinforcement	35	400
Strengthen, do not have the U type that cements union and become the rigidity metal bellows	55	320

Make not have with same material, same parameter and strengthen U type bellows and reinforcement, the nothing metal bellows that the U type becomes two kinds of structures of rigidity metal bellows that cements union and compare calculating, its displacement compensation capability and mean rigidity see the following form, data show, the displacement compensation capability of strengthening, do not have the U type change rigidity metal bellows that cements union is greatly improved, and its mean rigidity has bigger decline.

Claims (1)

1, a kind of reinforcement, do not have the U type that cements union and become the rigidity metal bellows, it is characterized in that: it adopts near (or a plurality of) ripple at two ends and to strengthen U type bellows (1) on many ripples of a bellows, and intermediate wave adopts does not have the U type bellows (2) of reinforcement.

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