Connecting component with telescopic function

Abstract

The utility model discloses a connecting member with a telescopic function, which relates to the technical field of pipeline connection and comprises a metal corrugated pipe and an inner sleeve, two ends of the metal corrugated pipe are fixedly connected with connecting flanges, one end of the inner sleeve is provided with a welding end, and the inner sleeve is welded in the metal corrugated pipe through the welding end. A first baffle and a second baffle are fixedly connected to the inner side wall of the outlet end of the metal corrugated pipe, a liquid passing cavity is formed between the first baffle and the second baffle, and liquid passing holes which are evenly distributed are formed in the surface of the first baffle and the surface of the second baffle. The metal corrugated pipe can avoid the phenomenon that silt in water can block the corrugated pipe, the axial compensation capacity of the metal corrugated pipe is guaranteed, the length of the metal corrugated pipe can be automatically adjusted when the pipeline is heated or cooled, displacement caused by temperature changes can be absorbed, the phenomenon of thermal expansion and cold contraction caused by the temperature changes can be effectively coped, and the service life of the metal corrugated pipe is prolonged. The stress concentration caused by temperature change is reduced, and the risks of leakage and damage are reduced, so that the safety and reliability of a pipeline system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a connecting component with a telescopic function. Background Art

[0002] In modern industrial pipeline systems, the design of connecting components is crucial for the safety and stability of the system. With the continuous upgrading of industrial equipment and the improvement of process requirements, traditional pipeline connection methods face many challenges, especially when dealing with factors such as temperature changes, vibrations, and displacements. Existing connecting components, such as flange connections and welding, although meeting basic requirements to a certain extent, lack flexibility and adaptability and are difficult to effectively solve the displacement problems caused by thermal expansion and contraction of pipelines. During the operation of pipelines, affected by temperature changes, thermal expansion and contraction often occur. If this phenomenon is not effectively controlled, it is easy to cause stress concentration at the pipeline joints, leading to leakage, damage, or other safety hazards. Although the current metal bellows can alleviate this problem, in order to ensure that the bellows can expand and contract, only one end of the bellows is fixed to the inner sleeve. When water hammer phenomenon or water backflow occurs, the water will enter the gap between the bellows and the inner sleeve. After long-term use, the sediment in the water will block the bellows, causing the metal bellows to lose its axial compensation ability.

[0003] Therefore, those skilled in the art have provided a connecting component with a telescopic function to solve the problems raised in the above background art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connecting component with a telescopic function to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A connecting component with a telescopic function includes a metal bellows and an inner sleeve. Both ends of the metal bellows are fixedly connected with connecting flanges. One end of the inner sleeve is provided with a welding end, and the inner sleeve is welded inside the metal bellows through the welding end. The inner side wall of the outlet end of the metal bellows is fixedly connected with a first baffle and a second baffle. A liquid passage cavity is formed between the first baffle and the second baffle, and evenly distributed liquid passage holes are formed on the surfaces of the first baffle and the second baffle.

[0007] As a further scheme of the utility model: Slide sleeves are embedded and connected to the surfaces of the first baffle and the second baffle, and sliding rods are slidably connected to the inner side walls of the slide sleeves.

[0008] As a still further scheme of the utility model: A cut-off plate is fixedly connected to the surface of the sliding rod, and a sealing gasket is fixedly connected to the surface of the cut-off plate. The sealing gasket is made of rubber material.

[0009] As a further solution of the utility model: A connecting return spring is fixedly connected between the cut-off plate and the second baffle, and the connecting return spring is sleeved outside the sliding rod.

[0010] As a further solution of the utility model: An ear plate is fixedly connected to the side wall of the connecting flange, and a protective pull rod is movably connected to the inner side wall of the ear plate.

[0011] As a further solution of the utility model: An external thread groove is formed on the surface of the protective pull rod, and a fixed nut and an adjusting nut are threadedly connected to the protective pull rod through the external thread groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] When the water liquid flows to the first baffle, the water liquid flows to the cut-off plate through the liquid passing hole, the water liquid presses the cut-off plate, the water liquid flows into the liquid passing cavity, and then passes out through the liquid passing hole on the second baffle. When the cut-off plate moves, the return spring is compressed, so that the return spring is in a compressed state. When the water liquid flows backward or a water hammer phenomenon occurs, the return spring loses pressure and returns to the initial state. One end of the return spring moves to drive the cut-off plate to move, and the movement of the cut-off plate drives the sealing gasket thereon to move. The liquid passing cavity is sealed through the movement of the sealing gasket, which can effectively prevent the water liquid from flowing back and avoid the water liquid from flowing into the gap between the corrugated pipe and the inner sleeve, that is, avoid the phenomenon that the sediment in the water liquid blocks the corrugated pipe, ensure the axial compensation ability of the metal corrugated pipe, can automatically adjust its length when the pipeline is heated or cooled, absorb the displacement caused by temperature change, effectively cope with the thermal expansion and contraction phenomenon caused by temperature change, reduce the stress concentration caused by temperature change, and reduce the risk of leakage and damage, thereby improving the safety and reliability of the pipeline system; By rotating the adjusting thread, the distance between the fixed nut and the adjusting nut is adjusted to limit the displacement of the metal corrugated pipe during temperature change or pressure fluctuation, ensure the effective working range of the metal corrugated pipe, prevent structural damage caused by excessive displacement, and at the same time, the protective pull rod provides additional supporting force to help bear the axial force in the pipeline system and enhance the stability of the system. Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of a connecting member with a telescopic function.

[0015] Figure 2 It is a connecting member with a telescopic function Figure 1 The enlarged view at A in the figure.

[0016] Figure 3 It is a schematic diagram of the internal structure of the metal corrugated pipe in a connecting member with a telescopic function.

[0017] Figure 4It is a connecting member with a telescopic function Figure 3 Enlarged view of part B in

[0018] In the figure: 1. Metal bellows; 2. Connecting flange; 3. Inner sleeve; 4. Welding end; 5. Ear plate; 6. Protection pull rod; 7. Fixed nut; 8. Adjusting nut; 9. First baffle; 10. Second baffle; 11. Liquid through hole; 12. Sliding sleeve; 13. Sliding rod; 14. Return spring; 15. Liquid through cavity; 16. Cut-off plate; 17. Sealing gasket. Specific implementation mode

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Embodiment 1

[0021] Refer to Figures 1-4, this embodiment provides a connecting member with a telescopic function, including a metal bellows 1 and an inner sleeve 3. Both ends of the metal bellows 1 are fixedly connected with connecting flanges 2. One end of the inner sleeve 3 is provided with a welding end 4, and the inner sleeve 3 is welded inside the metal bellows 1 through the welding end 4. The inner side wall of the outlet end of the metal bellows 1 is fixedly connected with a first baffle 9 and a second baffle 10. A liquid passage cavity 15 is formed between the first baffle 9 and the second baffle 10. The surfaces of the first baffle 9 and the second baffle 10 are both provided with uniformly arranged liquid passage holes 11. The surfaces of the first baffle 9 and the second baffle 10 are both embedded with sliding sleeves 12. The inner side wall of the sliding sleeve 12 is slidably connected with a sliding rod 13. The surface of the sliding rod 13 is fixedly connected with a cut-off plate 16. The surface of the cut-off plate 16 is fixedly connected with a sealing gasket 17. The sealing gasket 17 is made of rubber material. A connecting return spring 14 is fixedly connected between the cut-off plate 16 and the second baffle 10, and the connecting return spring 14 is sleeved outside the sliding rod 13. When the water liquid flows to the first baffle 9, the water liquid flows to the cut-off plate 16 through the liquid passage holes 11. The water liquid presses the cut-off plate 16, and the water liquid flows into the liquid passage cavity 15, and then passes out through the liquid passage holes 11 on the second baffle 10. When the cut-off plate 16 moves, the return spring 14 is compressed, so that the return spring 14 is in a compressed state. When the water liquid flows backward or a water hammer phenomenon occurs, the return spring 14 loses pressure and returns to the initial state. One end of the return spring 14 moves to drive the cut-off plate 16 to move, and the movement of the cut-off plate 16 drives the sealing gasket 17 thereon to move. The liquid passage cavity 15 is sealed by the movement of the sealing gasket 17, which can effectively avoid the backflow of water liquid, prevent the water liquid from flowing into the gap between the bellows and the inner sleeve, that is, prevent the sediment in the water liquid from blocking the bellows, ensure the axial compensation ability of the metal bellows 1, can automatically adjust its length when the pipeline is heated or cooled, absorb the displacement caused by temperature change, can effectively cope with the thermal expansion and contraction phenomenon caused by temperature change, reduce the stress concentration caused by temperature change, and reduce the risk of leakage and damage, thereby improving the safety and reliability of the pipeline system.

[0022] Embodiment 2

[0023] Referring to Figures 1-2 , this embodiment is based on the previous embodiment. The difference from the previous embodiment is that an ear plate 5 is fixedly connected to the side wall of the connecting flange 2. A protective pull rod 6 is movably connected to the inner side wall of the ear plate 5. An external thread groove is formed on the surface of the protective pull rod 6. The protective pull rod 6 is threadedly connected with a fixed nut 7 and an adjusting nut 8 through the external thread groove. By rotating the adjusting thread, the distance between the fixed nut 7 and the adjusting nut 8 is adjusted to limit the displacement of the metal bellows 1 during temperature change or pressure fluctuation, ensure the effective working range of the metal bellows 1, prevent structural damage caused by excessive displacement. At the same time, the protective pull rod 6 provides additional supporting force to help bear the axial force in the pipeline system and enhance the stability of the system.

[0024] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0025] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A connecting member with a telescopic function, characterized in that, It includes a metal bellows (1) and an inner sleeve (3). Both ends of the metal bellows (1) are fixedly connected with connecting flanges (2). One end of the inner sleeve (3) is provided with a welding end (4), and the inner sleeve (3) is welded inside the metal bellows (1) through the welding end (4). On the inner side wall of the outlet end of the metal bellows (1), a first baffle (9) and a second baffle (10) are fixedly connected. A liquid passage cavity (15) is formed between the first baffle (9) and the second baffle (10), and liquid passage holes (11) are evenly arranged on the surfaces of the first baffle (9) and the second baffle (10).

2. The connecting member with a telescopic function according to claim 1, characterized in that, Sliding sleeves (12) are embedded and connected to the surfaces of the first baffle (9) and the second baffle (10), and sliding rods (13) are slidably connected to the inner side walls of the sliding sleeves (12).

3. The connecting member with a telescopic function according to claim 2, characterized in that, A cut-off plate (16) is fixedly connected to the surface of the sliding rod (13), and a sealing gasket (17) is fixedly connected to the surface of the cut-off plate (16). The sealing gasket (17) is made of rubber material.

4. A connecting member with a telescopic function according to claim 3, characterized in that, A connecting return spring (14) is fixedly connected between the cut-off plate (16) and the second baffle (10), and the connecting return spring (14) is sleeved outside the sliding rod (13).

5. A connecting member with a telescopic function according to claim 1, characterized in that, An ear plate (5) is fixedly connected to the side wall of the connecting flange (2), and a protection pull rod (6) is movably connected to the inner side wall of the ear plate (5).

6. The connecting member with a telescopic function according to claim 5, characterized in that External thread grooves are formed on the surface of the protection pull rod (6), and a fixed nut (7) and an adjusting nut (8) are threadedly connected to the protection pull rod (6) through the external thread grooves.

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