TWI703291B - Bellows device - Google Patents

Abstract

A corrugated pipe device includes a body unit and a reinforcement unit installed on the body unit. The body unit includes a main pipe and two end pipes respectively connected to opposite ends of the main pipe. The main pipe includes a plurality of crests, a plurality of connecting portions, and a plurality of troughs forming a wave pattern with the crests through the connecting portions. A space is defined between each trough part and two adjacent connecting parts. The reinforcement unit includes a plurality of reinforcement modules respectively arranged in the interval spaces, a set of net sleeves arranged on the main pipe, and two tie rings respectively arranged on the end pipes and used for positioning the net sleeve. The reinforcement modules produce a supporting effect in the spacing spaces, and the mesh sleeve, which is covered from the outside to produce a radial positioning effect, can prevent the wave crests and wave troughs from being deformed.

Description

Bellows device

The present invention relates to a pipe fitting for conveying fluid, in particular to a bellows device.

In order to cope with the delivery of high-pressure fluids, delivery pipes that can withstand a certain pressure are required. Referring to Fig. 1, there is a conventional corrugated pipe 1, including a pipe body 11, a net sleeve 12 covering the pipe body 11, two end pipes 13 respectively connected to opposite ends of the pipe body 11, and two end pipes respectively connected to The opposite ends of the tube body 11 are used for positioning the net sleeve 12 and connecting the collars 14 of the end tubes 13. Wherein, each end tube 13 and the collar 14 on the same side are formed through a welding point 19 formed at the joint end of the individual collar 14, the individual end tube 13 and the tube body 11, so that the end tube 13 It is connected with the tube body 11 and the collar 14 on the same side is positioned.

The tube body 11 includes a plurality of crest portions 118 and trough portions 119 that are continuously connected in a staggered manner. The repetitive wave type formed by the crest portions 118 and the trough portions 119 can achieve shock absorption, pressure resistance, and even prevent The effect of thermal deformation. When the mesh sleeve 12 is wrapped on the tube body 11, it directly contacts the wave crests 118, thereby generating a radial limit effect, which can strengthen the tube body 11's ability to withstand internal pressure and shock absorption. The repetitive wave type formed by the wave crest parts 118 and the wave trough parts 119 together allows the tube body 11 to provide slight elasticity compared to the completely flat form, thereby generating optimized pressure resistance performance And the effect of shock absorption.

Referring to Figures 1 and 2 at the same time, when the bellows 1 is used to transmit high-pressure fluid, the pressure bearing capacity will not be completely evenly distributed during the flow of the fluid, so local larger bearing capacity is still possible The wave crests 118 or the wave troughs 119 are deformed, thereby destroying the original regular repetitive wave pattern. In order to prevent the wave crest portions 118 or the wave trough portions 119 from being deformed, although the corrugated tube 1 strengthens the radial support force through the mesh sleeve 12, it does not touch the mesh compared to the wave crest portions 118. The troughs 119 that cannot be supported by the sleeve 12 will still be deformed. Especially if the high pressure characteristics of the high-pressure fluid cause the wave crests 118 to expand radially, because the outside of the wave crests 118 will still be supported by the mesh sleeve 12, the deformation caused by the pressure will be reflected in each wave. The expansion of a crest portion 118, and the aforementioned deformation will affect the trough portions 119 together, so that the trough portions 119 are similarly squeezed inward from the opposite sides of the axial direction, thus causing the trough to appear Sharper deformation. When any of the wave troughs 119 produces the above-mentioned deformation, it will not only destroy the entire complete wave pattern, but may also cause stress concentration. In the slightest, the bellows 1 will lose the originally expected effect, and in the worst case, the local structure will not be able to withstand the external force. Case.

Referring to Fig. 3 and in conjunction with Fig. 1, in terms of the overall strength of the bellows 1, even if the wave crests 118 and the wave troughs 119 are used to optimize the pressure-bearing performance, at each end pipe 13, the pipe The corresponding end of the body 11 and the collar 14 on the same side only rely on a single solder joint 19 to form a connection. When the bellows 1 is under pressure, the solder joints 19 must be at the same time Supporting stress from multiple directions, the probability of damage from there is relatively increased, and durability is also doubtful.

Therefore, the object of the present invention is to provide a bellows device that can avoid deformation to improve durability and optimize the performance of conducting fluid.

Therefore, the corrugated pipe device of the present invention includes a main body unit and a reinforcement unit installed on the main body unit.

The main body unit includes a main pipe and two end pipes respectively connected to opposite ends of the main pipe. The main pipe includes a plurality of wave crest parts and a plurality of joint parts respectively connected to the opposite ends of the wave crest parts and extending in a radial direction, And a plurality of the wave crest parts are interlaced and connected through the connecting parts to form a continuous wave trough part. The outer side of each wave trough part and two adjacent connecting parts jointly define a space.

The reinforcement unit includes a plurality of reinforcement modules respectively arranged in the interval spaces, a set of net sleeves arranged outside the main pipe, and two tie rings respectively arranged on the end pipes and used for positioning the net sleeve.

The effect of the present invention is that the reinforcing modules are respectively arranged in the interval spaces, which can produce a supporting effect on the wave troughs, and the net sleeve that is covered from the outside to produce a radial positioning effect can be effective Preventing the wave crests and the wave troughs from being deformed can not only improve the usability and durability of the bellows device of the present invention, but also optimize the transmission performance of high-pressure fluid due to the strengthening of the overall structure.

Referring to FIG. 4, an embodiment of the corrugated pipe device of the present invention includes a body unit 2 and a reinforcing unit 3 installed on the body unit 2. This embodiment is suitable for connecting fixed or movable flanges to form a fluid transmission path after installation, and the installation method can be adjusted freely according to the use environment or equipment conditions, instead of using the technical means of flange installation Is limited.

Referring to FIGS. 4 and 5 at the same time, the body unit 2 includes a main pipe 21 extending along an axial direction, and two end pipes 22 integrally connected to opposite ends of the main pipe 21 respectively. The main pipe 21 includes a plurality of crest portions 211, a plurality of connecting portions 219 respectively connected to opposite ends of the crest portions 211 and extending in the radial direction, and a plurality of intersecting portions with the crest portions 211 through the connecting portions 219. Converging trough 212. It should be explained first that each wave crest part 211 and each wave trough part 212 are ring-shaped, viewed from the cross section of the main pipe 21 in the radial direction, the wave crest parts 211 and the connecting parts 219, and the The trough portions 212 may collectively form a continuous wave type traveling along the axial direction, and the crest portions 211 and the trough portions 212 substantially correspond to the crests and troughs of the continuous wave type, respectively. The outer side of each wave trough 212 and the two adjacent connecting parts 219 jointly define a space 210, and the wave troughs 212 adjacent to the end pipes 22 are respectively connected to the wave troughs 212 The connecting portions 219 of the two are separated from the end pipes 22 to define a port space 220 (shown in FIG. 8), and the trough portion 212 is spaced from the end pipe 22 to define a port communicating with the port The notch 229 of the space 220.

The reinforcement unit 3 includes a plurality of reinforcement modules 31 respectively arranged in the spacing spaces 210, a set of net sleeves 32 arranged outside the main pipe 21, and two sets of net sleeves 32 respectively arranged on the end pipes 22 and used for positioning the net The bezels 33 of the sleeve 32, the two adapter rings 34 respectively disposed in the port spaces 220, the two are respectively welded to the inner solder 35 between the adapter rings 34 and the end tubes 22, and the two are respectively welded to the The tie ring 33 is away from the outer solder 36 between one end of the connecting ring 34 and the mesh sleeve 32.

Referring to FIGS. 5 and 6, each reinforcing module 31 has two C-shaped and respectively having an opening 310 and can be connected to each other to form a complete ring-shaped half-ring 311, that is, each reinforcing module 31 The half-rings 311 of the group 31 are butted with each other in the directions of the openings 310 facing each other to form two connection points 41, which is beneficial to improve the work efficiency when assembling one by one. Referring to FIGS. 5 to 7, each half-ring 311 is composed of an inner ring portion 312 and an expansion portion 313 integrally connected to the radially outer side of the inner ring portion 312 and gradually expanding in width. The opposite sides of the inner ring portion 312 of each reinforcing module 31 are spaced apart from the adjacent connecting portions 219, so that each wave pattern still has a margin of slight vibration along the axial direction to absorb and transport high-pressure fluid The vibration generated thereby achieves the effect of shock absorption; and each expansion portion 313 corresponds to the adjacent crest portions 211 on the left and right sides, and both sides extend along the outer arc of the individual crest portion 211 to match These wave crests 211 produce a targeted supporting effect. In addition, since the connecting points 41 of the reinforcing units 31 are displaced from each other along the axial direction of the main pipe 21 as shown in FIG. 6, the connecting points 41 are not concentrated on the extension of the same straight line. Disperse the contacts to avoid the phenomenon of force concentration.

Referring to FIG. 8 and in conjunction with FIG. 4, each adapter ring 34 has a base 341 located in the port space 220, and a lap that extends from the base 341 in a direction away from the main pipe 21 and overlaps the respective end pipe 22 Portion 342, and a tenon portion 343 extending from the respective base portion 341 and positioned in the recess 229. Compared with the reinforcing module 31, the connecting ring 34 can also support the trough 212 corresponding to the port space 220 in addition to the different positions. In addition, it can also be connected to The overlapping portions 342 of the end pipes 22 on the same side, and the tenon portions 343 (only a single side shown in FIG. 8) respectively positioned in the recesses 229 play the function of optimizing the connection strength.

Referring to Figures 7 and 8 at the same time, in order to make each adapter ring 34 really exert a good fixing effect, each adapter ring 34 is also positioned in a separate port space 220 by welding, specifically, it can be connected to the main pipe 21 A welding point 42 is formed between the individual latching portion 343 and the main pipe 21 at a location, as shown in FIG. 8. In order to further avoid the stress concentration problem of the adapter rings 34, in addition to welding the adapter ring 34 to the main pipe 21, the inner solder 35 is also formed at the overlap with the end pipe 22 on the same side. Each inner solder 35 is formed between the individual overlapping portion 342 and the end tube 22 on the same side, so that each adapter ring 34 and the main pipe 21 and the end tube 22 on the same side can form a respective welding point , To disperse the stress and optimize the stability of the connection.

It should be particularly noted that when the materials that are connected to each other due to welding are different, it is easy to accelerate corrosion due to the potential difference between the different materials. In order to prevent corrosion at the welding place, the material of the reinforcement modules 31 of the reinforcement unit 3 is The main pipe 21 of the main body unit 2 is the same, and the material of the connecting rings 34 is the same as that of the main pipe 21 and the end pipes 22 of the main body unit 2. There is a potential difference between them, and it is particularly preferable to use stainless steel materials such as SUS-304, SUS-316, etc., which can more effectively prevent corrosion and greatly improve durability.

4, 7, and 8 again, when the reinforcement modules 31 and the connecting rings 34 of this embodiment are all installed, the tie rings 33 are used to match the welding positioning of the outer solder 36 , The net cover 32 can be fixed to complete the assembly of this embodiment. Wherein, for the bezel 33 and the adapter ring 34 located on the same side, the inner solder 35 and the solder joint 42 are formed between each adapter ring 34 and the end tube 22 on the same side. There are three welding points, and the welding points of the outer solder 36 are also formed between each bezel 33 and the mesh sleeve 32, that is, at the joint between the main pipe 21 and each end pipe 22, there are essentially three Welding points to disperse the stress generated during use can indeed improve the stability of the combination.

Then in terms of overall strength, the reinforcement modules 31 can respectively support the crest portion 211 and the trough portion 212 corresponding to the spacing spaces 210, and the connecting rings 34 can support At the trough 212 corresponding to the port spaces 220, the connection strength at the joints of the end pipes 22 is also strengthened to avoid stress concentration. Finally, with the mesh sleeve 32 that provides a radially inward support effect, it can integrally maintain the continuous wave type structure formed by the wave crests 211 and the wave troughs 212 of the main pipe 21, effectively Prevent the generation of deformation, thereby improving the durability and the internal pressure that can withstand.

In summary, the corrugated pipe device of the present invention can support the wave crests 211 and wave troughs 212 of the main pipe 21 by the reinforcement modules 31 of the reinforcement unit 3, and cooperate with the mesh sleeve 32 Maintain the continuous wave structure formed by the wave crests 211 and the wave troughs 212, thereby strengthening the overall structural strength and avoiding deformation, which not only improves the usability and durability, but also optimizes the transmission of high-pressure fluid The performance of the invention can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

2: body unit 21: Supervisor 210: Interval 211: crest 212: trough 219: Connection Department 22: End pipe 220: port space 229: Notch 3: Strengthening unit 31: Reinforcement module 310: open 311: half ring 312: Inner Ring 313: Extension 32: net set 33: Clamping ring 34: Connecting ring 341: base 342: Overlap 343: Tenon 35: inner solder 36: Outer solder 41: Connection point 42: solder joint

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a schematic diagram illustrating an existing bellows; FIG. 2 is a schematic diagram of the process, which is used in conjunction with FIG. 1 to illustrate the deformation of a tube body of the existing corrugated tube; Figure 3 is a partial enlarged view illustrating the shortcomings in the structural strength of the existing bellows; Figure 4 is a schematic diagram illustrating an embodiment of the bellows device of the present invention; Figure 5 is a partial three-dimensional exploded view illustrating the assembly method of two reinforcement modules of one of the reinforcement units of this embodiment; Figure 6 is a partial side view, in conjunction with Figure 5 to illustrate the completion of the installation of the reinforcement modules; Figure 7 is a partially enlarged schematic diagram illustrating the installation of the reinforcement modules on a body unit of the embodiment; and Fig. 8 is a partially enlarged schematic diagram illustrating the installation method and the effect that can be produced by using one of the adapter rings of the reinforcing unit.

2: body unit

21: Supervisor

211: crest

212: trough

219: Connection Department

22: End pipe

3: Strengthening unit

31: Reinforcement module

32: net set

33: Clamping ring

34: Connecting ring

35: inner solder

36: Outer solder

Claims (9)

A bellows device includes: a body unit, including a main pipe, and two end pipes respectively connected to opposite ends of the main pipe. The main pipe includes a plurality of wave crest parts, a plurality of wave crest parts respectively connected to the opposite ends of the wave crest parts and The connecting parts extending in the radial direction, and a plurality of the wave crest parts intersectingly connected through the connecting parts to form a continuous wave trough part. The outside of each trough part is between two adjacent connecting parts Jointly define an interval space; and a reinforcement unit installed on the main body unit, and includes a plurality of reinforcement modules respectively arranged in the interval spaces, a net sleeve arranged outside the main pipe, and two separate sets The binding rings arranged on the end pipes and used for positioning the net sleeve, each reinforcing module has two C-shaped half-rings each having an opening and can be connected to each other to form a complete ring. A half ring is composed of an inner ring part and an expansion part which is integrally connected to the radial outside of the inner ring part and has a gradually expanding width. The corrugated pipe device according to claim 1, wherein the half-rings of each reinforcing module are butted with each other in the directions of the openings facing each other to form two connection points, and the two connecting points of at least two reinforcing units The connection points are misaligned along the axial direction of the main pipe. The bellows device according to any one of claims 1 to 2, wherein the opposite sides of each reinforcing module of the reinforcing unit are spaced apart from the adjacent connecting portions. The bellows device according to any one of claims 1 to 2, wherein the material of the reinforcement modules of the reinforcement unit is the same as that of the main pipe of the body unit. The corrugated pipe device according to claim 1, wherein the main pipe is adjacent to the two ends of the end pipes to define a port space separated from the end pipes, and the reinforcing unit further includes two ports respectively arranged in the port spaces The convergence loop. The bellows device according to claim 5, wherein each port space is defined by the main pipe adjacent to the trough portion of the respective end pipe, the connecting portion connected to the trough portion, and the respective end pipe. The wave trough is spaced from the end tube to define a notch communicating with the port space, and each of the connecting rings of the reinforcing unit has a base located in the port space and a distance away from the base. The direction of the main pipe extends and overlaps the overlap portion of the individual end pipe, and a tenon portion extending from the individual base portion and positioned in the recess. The bellows device according to claim 6, wherein the reinforcement unit further comprises two inner solders respectively welded between the overlapping parts of the connecting rings and the end pipes. The bellows device according to any one of claims 5 to 7, wherein the material of the connecting rings of the reinforcing unit is the same as the main pipe and the end pipes of the body unit. The corrugated pipe device according to claim 1, wherein the reinforcement unit further includes two outer solders respectively welded between an end of the tie rings away from the body unit and the mesh sleeve.

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