Single axial corrugated compensator with fairing

Abstract

The utility model discloses a single formula axial corrugated compensator with flow guiding cylinder, can be widely used in heating, fire control, food industry and general equipment pipeline system, its structure includes corrugated pipe, flange, lug and pull rod subassembly etc, mainly is through adding a flow guiding cylinder in corrugated pipe, and one end of flow guiding cylinder is fixedly connected in the import end of corrugated pipe, and the other end is set as the free end extending to the export end of corrugated pipe, to constitute an internal fluid guiding structure. The flow guiding cylinder is guaranteed that the axial compensation function of corrugated pipe is not affected by the setting of its free end. Meanwhile, it can effectively guide and rectify the fluid flowing through the inside of corrugated pipe, make the fluid flow more quickly and evenly, significantly reduce the fluid resistance and pressure loss in pipe, thereby reduce the system energy consumption. In addition, the flow guiding cylinder also directly isolates and protects the inner wall of corrugated pipe, makes it avoid the direct scouring and turbulence disturbance of fluid, prolongs the service life.

Description

Technical Field

[0001] This utility model relates to a single axial corrugated compensator, specifically a single axial corrugated compensator with a guide tube. Background Technology

[0002] A single-type axial bellows compensator is a flexible connection element widely used in piping systems, primarily for absorbing axial displacement of pipelines. A typical single-type axial bellows compensator usually includes a bellows and two flanges, one at the inlet and one at the outlet of the bellows. Each flange has a lug, and the corresponding lugs on the two flanges are connected by a tie rod assembly. However, the compensator with this structure has a relatively simple function, only compensating for pipeline displacement. In practical use, because the fluid flows directly through the bellows, the corrugated structure of its inner wall generates significant disturbance and resistance to the fluid, resulting in less smooth and uniform fluid flow within the pipe, increasing pressure loss and energy consumption of the piping system. Simultaneously, the direct scouring and turbulence of the fluid may also cause potential erosion or vibration damage to the bellows itself, leaving it without internal protection. Therefore, how to improve the internal fluid flow state, reduce energy consumption, and protect the bellows without affecting its axial compensation function is a technical problem worth solving in this field. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and to provide a single axial bellows compensator with a flow guide tube. This compensator can improve the internal fluid flow state, reduce energy consumption and protect the bellows without affecting the axial compensation function of the bellows.

[0004] The technical problem of this utility model is solved by the following technical solution: A single axial bellows compensator with a flow guide tube includes a bellows and two flanges respectively disposed at the inlet and outlet ends of the bellows. Each flange is provided with a lug, and the corresponding lugs on the two flanges are connected by a tie rod assembly. A flow guide tube is disposed inside the bellows. One end of the flow guide tube is a fixed end fixedly connected to the inlet end, and the other end is a free end extending towards the outlet end. The flow guide tube is configured to guide the fluid flowing through it while allowing the bellows to expand and contract axially through its free end.

[0005] The corrugated pipe has an integrally extended inlet straight pipe at its inlet end and an integrally extended outlet straight pipe at its outlet end; the fixed end of the guide tube is located inside the inlet straight pipe, and the free end of the guide tube extends into the outlet straight pipe.

[0006] The flange at the inlet end, the end of the inlet straight pipe, and the fixed end of the guide tube are fixed together by welding.

[0007] The pull rod assembly includes a pull rod and nuts, the end of the pull rod passing through a hole in the ear plate and being locked by a pair of nuts to achieve an adjustable connection.

[0008] The number of ear plates is three pairs, which are symmetrically arranged on the two flanges respectively; the number of tie rod assemblies is three sets, which are connected to the three pairs of ear plates respectively.

[0009] The three pairs of lugs are evenly distributed along the circumference of their respective flanges.

[0010] The length of the guide tube is set such that, after its fixed end is installed, there is an axial gap between its free end and the inner wall of the outlet end of the bellows.

[0011] The length of the guide tube is set such that, after its fixed end is installed, there is an axial gap between its free end and the inner wall of the outlet straight pipe.

[0012] The outer surface of the inlet straight pipe and / or outlet straight pipe is marked with a symbol to indicate the direction of fluid flow.

[0013] The corrugated pipe is a stainless steel corrugated pipe, and the guide tube is made of stainless steel.

[0014] Compared with existing technologies, this invention mainly involves adding a guide tube inside the bellows, with one end of the guide tube fixedly connected to the inlet end of the bellows and the other end extended freely towards the outlet end of the bellows, thus forming an internal fluid guiding structure. The guide tube, with its free end, ensures that the axial compensation function of the bellows remains unaffected. Simultaneously, it effectively guides and rectifyes the fluid flowing through the bellows, resulting in faster and more uniform fluid flow, significantly reducing fluid resistance and pressure loss within the pipe, thereby reducing system energy consumption. Furthermore, the guide tube directly isolates and protects the inner wall of the bellows from direct fluid scouring and turbulent disturbances, extending its service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model (half-sectional view along the axis).

[0016] Figure 2 This is a structural diagram of a corrugated pipe, an inlet straight pipe, and an outlet straight pipe.

[0017] Figure 3 This is a schematic diagram of the flow guide tube. Detailed Implementation

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1-3 As shown, 1. Bellows, 11. Inlet straight pipe, 12. Outlet straight pipe, 2. Flange, 3. Ear plate, 4. Tie rod assembly, 41. Tie rod, 42. Nut, 5. Flow guide tube, 51. Fixed end, 52. Free end, 6. Marking. The same number in each figure represents the same component.

[0020] A single-type axial bellows compensator with a flow guide tube, such as Figure 1 As shown, it has structural advantages such as simple design, convenient processing, and low investment. It can be widely used in heating, fire protection, food industry and general equipment piping systems. Its structure mainly includes corrugated pipe 1, flange 2, ear plate 3, tie rod assembly 4 and guide tube 5.

[0021] The bellows 1 has an inlet end and an outlet end at its two ends, respectively; two flanges 2 are fixedly installed at the inlet end and the outlet end of the bellows 1, respectively, for connection with external pipelines. To achieve better connection and transition, the inlet end of the bellows 1 has an integrally extended inlet straight pipe 11, and the outlet end has an integrally extended outlet straight pipe 12.

[0022] The guide tube 5 is located inside the bellows 1 and is its core improved component. One end of the guide tube 5 is a fixed end 51, which is fixedly connected to the inlet end of the bellows 1. Specifically, the flange 2 at the inlet end, the end of the inlet straight pipe 11, and the fixed end 51 of the guide tube 5 are fixed together by welding, so that the fixed end 51 of the guide tube 5 is located inside the inlet straight pipe 11.

[0023] The other end of the guide tube 5 is a free end 52 extending towards the outlet end of the bellows 1. This free end extends into the interior of the outlet straight pipe 12 and is not fixedly connected to any component at the outlet end. Through this design, the guide tube 5, by setting its free end 52, can guide the fluid flowing through it while allowing the bellows 1 to undergo axial expansion and contraction.

[0024] Preferably, the length of the guide tube 5 is set such that when its fixed end is installed, its free end can maintain a predetermined axial gap between the inner wall of the outlet straight pipe 12 or the inner wall of the outlet end of the corrugated pipe 1 (in an embodiment where the outlet straight pipe 12 is not provided), which ensures that the guide tube 5 does not obstruct the axial compensation movement of the corrugated pipe 1.

[0025] Each flange 2 is provided with a lug plate 3. In this embodiment, the number of lug plates 3 is preferably three pairs, which are symmetrically welded to two flanges 2 respectively, and the three pairs of lug plates 3 are evenly distributed along the circumference of their respective flanges 2.

[0026] Meanwhile, the corresponding lugs 3 on the flanges 2 at both ends are connected by tie rod assemblies 4. Correspondingly, there are three sets of tie rod assemblies 4, each set including a tie rod 41 and a nut 42. Specifically, the end of the tie rod 41 passes through a hole on the lug 3 and is locked with a pair of nuts 42, thus forming an adjustable connection. This tie rod assembly 4 is not only used to limit and protect the expansion and contraction range of the bellows 1, but also for the hoisting and fine-tuning of the installation length of the entire compensator.

[0027] To ensure corrosion resistance and structural strength, the bellows 1 is preferably a stainless steel bellows, and the guide tube 5 is also made of stainless steel. To further improve the convenience and accuracy of installation, a mark 6 for indicating the fluid flow direction can be provided on the outer surface of the inlet straight pipe 11 or the outlet straight pipe 12, such as... Figure 1 The arrow symbol shown, while Figure 1 In the example shown, the arrows point from left to right, indicating that the left end of the view is the fluid inlet and the right end is the fluid outlet.

[0028] In operation, this compensator absorbs axial displacement of the pipeline through the expansion and contraction of the bellows 1. Simultaneously, the internal guide tube 5 guides and rectifies the fluid, making its flow smoother and more uniform. This brings three beneficial effects: first, it significantly reduces turbulence and resistance when the fluid flows through the corrugated area, thereby reducing pressure loss and operating energy consumption in the pipeline system; second, the guide tube 5 directly isolates the fluid from scouring and impacting the inner wall of the bellows 1, providing protection and extending the service life of the bellows; and third, all of the above advantages are achieved without affecting the original axial compensation function of the bellows 1.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A single-type axial bellows compensator with a guide tube, comprising a bellows (1) and two flanges (2) respectively disposed at the inlet and outlet ends of the bellows, each flange being provided with an ear plate (3), the corresponding ear plates (3) disposed on the flanges (2) at both ends being connected by a tie rod assembly (4), characterized in that, The bellows (1) is provided with a guide tube (5), one end of which is a fixed end (51) fixedly connected to the inlet end, and the other end is a free end (52) extending toward the outlet end. The guide tube (5) is configured to guide the fluid flowing through it by means of the arrangement of its free end (52), while allowing the bellows (1) to extend and retract axially.

2. The single-type axial bellows compensator with a guide tube according to claim 1, characterized in that, The corrugated pipe (1) has an integrally extended inlet straight pipe (11) at its inlet end and an integrally extended outlet straight pipe (12) at its outlet end; the fixed end (51) of the guide tube (5) is located inside the inlet straight pipe (11), and the free end (52) of the guide tube (5) extends into the outlet straight pipe (12).

3. A single-type axial bellows compensator with a guide tube according to claim 2, characterized in that, The flange (2) at the inlet end, the end of the straight inlet pipe (11), and the fixed end (51) of the guide tube (5) are fixed by welding.

4. A single-type axial bellows compensator with a guide tube according to any one of claims 1 to 3, characterized in that, The pull rod assembly (4) includes a pull rod (41) and a nut (42), the end of which passes through a hole in the ear plate (3) and is locked by a pair of nuts (42) to achieve an adjustable connection.

5. A single-type axial bellows compensator with a guide tube according to claim 4, characterized in that, The number of ear plates (3) is three pairs, which are symmetrically arranged on the two flanges (2); the number of tie rod assemblies (4) is three sets, which are connected to the three pairs of ear plates (3).

6. A single-type axial bellows compensator with a guide tube according to claim 5, characterized in that, The three pairs of ear plates (3) are evenly distributed along the circumference of their respective flanges (2).

7. A single-type axial bellows compensator with a guide tube according to claim 1, characterized in that, The length of the guide tube (5) is set such that when its fixed end (51) is installed, there is an axial gap between its free end (52) and the inner wall of the outlet end of the bellows (1).

8. A single-type axial bellows compensator with a guide tube according to claim 2, characterized in that, The length of the guide tube (5) is set such that when its fixed end (51) is installed, there is an axial gap between its free end (52) and the inner wall of the outlet straight pipe (12).

9. A single-type axial corrugated compensator with a guide tube according to claim 2, characterized in that, The outer surface of the inlet straight pipe (11) and / or outlet straight pipe (12) is provided with markings (6) for indicating the direction of fluid flow.

10. A single-type axial bellows compensator with a guide tube according to any one of claims 1 to 3, characterized in that, The corrugated pipe (1) is a stainless steel corrugated pipe, and the guide tube (5) is made of stainless steel.

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