CN203757273U - Reinforced stainless steel bellows - Google Patents

Abstract

A reinforced stainless steel corrugated pipe, including a corrugated pipe, a corrugated pipe braided sleeve and a connector, the corrugated pipe is composed of a large corrugated pipe section in the middle and small corrugated pipe sections at both ends of the corrugated pipe, and the two ends of the large corrugated pipe section are sleeved, The lower ferrule, the two ends of the bellows braided sleeve are fixedly connected in the upper and lower ferrules, and the outer end surface of the small bellows section is connected and tightened by the connecting head and the outer connecting pipe. Since the two ends of the stainless steel braided sleeve are fitted on the large corrugated section in the middle of the bellows, and are tightened by the upper and lower ferrules at both ends, the large corrugated section in the middle of the bellows will not change with the pressure when it is impacted by internal pressure. Excessive elongation, or even loss of elasticity, thereby enhancing the compressive strength of the large corrugated section, and also eliminating the internal stress deformation caused by the welding of the corrugated section. At both ends of the bellows, the inner and outer end faces of several small bellows sections, the outer wire joints of the connecting pipe and the gaskets are used to form a reinforced sealing pair to improve the sealing performance against high internal pressure, and it will not leak when the internal pressure exceeds 1.6Mpa.

Description

A reinforced stainless steel bellows

technical field

The utility model relates to a corrugated pipe, in particular to a reinforced stainless steel corrugated pipe.

Background technique

The existing integral stainless steel bellows is made of corrugated and beamed stainless steel tubes. This kind of bellows is only suitable for use in cold and hot water pipelines with an internal pressure of 0.8Mpa or less. If used in cold and hot water with an internal pressure of 1.6Mpa When the water pipe is used, the bellows will be unstable, and the bellows will be stretched and lose their elasticity. Not only can they not compensate the stress changes caused by temperature or pressure changes, but also make their sealing performance drop rapidly and leak.

There is a reinforced stainless steel bellows in the market. Metal braided ferrules are welded outside the metal bellows. The braided ferrules are welded to the stainless steel welding head, resulting in many welded parts and welding points. The high temperature during welding deforms the bellows. When the pressure is applied, the stress and deformation are inconsistent, which seriously affects the sealing performance. CN201310362588.0 proposes a new type of corrugated metal hose. Flanges are installed at both ends of the bellows, and a reinforcing ring is set between the flange and the bellows. The outer shell of the bellows is connected with a metal Mesh sleeve, this kind of seal that changes the threaded connection between the flange and the bellows into a reinforcing ring, its sealing performance is affected, especially under high internal pressure conditions, there is a hidden danger of high internal pressure leakage.

Contents of the invention

The utility model aims at the problems of the stainless steel bellows being elongated and leaking under high internal pressure, and designs a reinforced stainless steel bellows which prevents the stainless steel bellows from being elongated, deformed, and sealed.

The technical scheme adopted by the utility model is: a reinforced stainless steel corrugated pipe, including a corrugated pipe, a corrugated pipe braided sleeve and a connector, which is characterized in that the corrugated pipe consists of a large corrugated pipe section in the middle and small corrugated pipes at both ends of the corrugated pipe. The two ends of the large bellows section are sleeved with upper and lower ferrules, the two ends of the bellows braided sleeve are fixed in the upper and lower ferrules, and the outer end surface of the small bellows section is connected by the connecting head and the outer Tighten the pipe connection.

The small bellows section is composed of the inner and outer end faces of the small bellows section, the outer wire joint of the connecting pipe and the sealing gasket to form a reinforced sealing pair.

The two ends of the upper and lower ferrules and the stainless steel braided sleeve are fixed by screws or by welding.

The beneficial effect of the above design is that: since the two ends of the stainless steel braided sleeve are fitted on the large corrugated section in the middle of the bellows, and are tightened by the upper and lower ferrules at both ends, the large corrugated section in the middle of the bellows will be impacted by internal pressure. It will not over-elongate or even lose its elasticity with pressure changes, thereby enhancing the compressive strength of the large corrugated section and eliminating the internal stress deformation caused by the welding of the corrugated section. At both ends of the bellows, the inner and outer end faces of several small bellows sections, the outer wire joints of the connecting pipe and the gaskets are used to form a reinforced sealing pair, which improves the sealing performance against high internal pressure, and will not leak when the internal pressure exceeds 1.6Mpa.

Description of drawings

Fig. 1 is a structural sectional view of the utility model.

FIG. 2 is an enlarged schematic diagram of A in FIG. 1 .

Detailed ways

Embodiments of the utility model are described in further detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , the stainless steel bellows part includes joints 1 at both ends of the bellows, a large bellows section 5 in the middle of the bellows, and a small bellows section 7 arranged at the joints 1 at both ends of the bellows. After pressing the large bellows section 5 in the middle of the steel pipe, put the lower ferrule 2 on both ends 1 of the bellows first, then put the stainless steel braided sleeve 4 on the periphery of the large bellows section 5, and then use the upper ferrule 3 to cover the stainless steel braided sleeve 4 The two ends of the lower ferrule 2 are fixed and tightened so that the stainless steel braided sleeve 4 clamps the two ends of the large bellows 5 and the outer cylindrical surface of the large bellows section 5, and the length of the stainless steel braided sleeve 4 is not greater than the large bellows section 5 and the total length of the upper ferrule 3 and the lower ferrule 2 at both ends of the large bellows section 5, so that the stainless steel braided sleeve 4 is not only a protective layer for the large bellows section 5, but also limits the length of the large bellows section 5 from being excessive due to increased internal pressure. elongate, or even lose its elasticity. The fixing of the upper ferrule 3, the lower ferrule 2 and the two ends of the stainless steel braided sheath 4 can be screwed or welded.

As shown in Figure 1 and Figure 2, the joint 1 at both ends of the bellows is provided with a small bellows section 7, and the number of corrugations of the small bellows section 7 is designed according to the internal pressure it bears. The internal pressure of 0.8-1.5Mpa is 1-2 small corrugations. The inner and outer end surfaces of the small bellows section 7, the outer wire joint 9 of the connecting pipe and the sealing gasket 8 form a reinforced sealing pair. The outer end surface 10 of the small bellows section is pressed and contacted by the side connecting the outer wire joint 9 and the gasket 8, the inner end surface 11 of the small bellows section is screwed and pressed by the union nut 6 of the outer connecting pipe, and the union nut of the outer joint 6. The combination of the small bellows section 7, the sealing gasket 8 and the outer wire joint 9 of the connecting pipe strengthens the sealing performance of the stainless steel bellows.

Claims (3)

1. a reinforced corrugated stainless steel tubing, comprise bellows, bellows woven sleeve and connecting head, it is characterized in that described bellows is made up of the large corrugated pipe segment of centre and the ripplet pipeline section at bellows two ends, be socketed upper and lower lasso at described large corrugated pipe segment two ends, described bellows woven sleeve two ends are fixed in upper and lower lasso, and the exterior edge face of described ripplet pipeline section is connected and tightens up with externally connected pipe by connecting head.

2. the reinforced corrugated stainless steel tubing of one according to claim 1, is characterized in that the inside and outside end face of described ripplet pipeline section and connecting tube nipple and sealing gasket composition strengthened sealing pair.

3. the reinforced corrugated stainless steel tubing of one according to claim 1, is characterized in that described upper and lower lasso and stainless steel woven sleeve two ends are tightened up by screws tighten or welding.