Steel-in-steel steam pipe joint with telescopic compensation

Abstract

The utility model discloses a steel sleeve steel steam pipeline joint with telescopic compensation in the technical field of pipeline engineering, including fixed pipeline, the both ends of fixed pipeline are slidably sleeved with the connecting pipeline, and the both sides of two connecting pipeline are provided with adjusting assembly, and the inboard of adjusting assembly and the both sides of connecting pipeline correspond and are provided with fixed component, and fixed pipeline is as main pipeline, and the fixed component and adjusting assembly that are provided with the both sides of connecting pipeline cooperate, form complete telescopic compensation structure, and each part cooperates, effectively solve the deformation stress problem that steel steam pipeline produces under the high temperature steam conveying condition because of thermal expansion and cold shrink, and the displacement demand of pipeline under complex working condition can be flexibly adapted to the connecting pipeline cooperation adjusting assembly, reduce the stress concentration of pipeline system whole, and the relative position of connecting pipeline and fixed pipeline can be stably locked by fixed component, to avoid the connection loosening caused by vibration.

Description

Technical Field

[0001] This utility model relates to the field of pipeline engineering, specifically a steel-jacketed steam pipe joint with expansion and contraction compensation. Background Technology

[0002] In modern industry, steam, as a highly efficient energy carrier, is widely used in numerous sectors such as power generation, chemical industry, papermaking, and food processing. Steel-jacketed steam pipelines, with their excellent insulation properties, high strength, and corrosion resistance, have become the ideal choice for long-distance, high-parameter steam transportation. The steel-jacketed steam pipeline joint, as a crucial connecting component in the pipeline system, plays a vital role. It must ensure a reliable connection between pipelines, guarantee the sealed transmission of steam, and prevent leakage.

[0003] Traditional connection technologies involve cumbersome installation steps, long construction periods, and high costs. Taking common welding connections as an example, problems in any step can affect installation quality. For instance, porosity and impurities generated during welding, additional stress caused by flange connection deviations, unreasonable steam system support and hanger settings, and installation methods that do not comply with operating procedures can all prevent the scientific and reasonable distribution of prestress in the pipeline network during operation, resulting in excessive local stress and posing potential hazards to the safe operation of the pipeline system. Therefore, it is necessary to design a steel-jacketed steam pipe joint with expansion and contraction compensation to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a steel-jacketed steam pipe joint with expansion and contraction compensation to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steel-jacketed steam pipe joint with expansion and contraction compensation, comprising a fixed pipe, with connecting pipes slidably fitted at both ends of the fixed pipe, an adjustment component provided on the outer side of the two connecting pipes, and a fixed component provided on the inner side of the adjustment component and correspondingly on the outer side of the connecting pipe.

[0006] Preferably, the adjusting assembly includes a first connecting plate welded and installed at the middle of the outer side of the connecting pipe. The first connecting plate has multiple through holes on one side. A first threaded rod is provided between two first connecting plates through the through holes. A first nut is screwed onto the outer side of the first threaded rod and located on the side of the first connecting plate. A first spring is fitted onto the outer side of the first threaded rod.

[0007] Preferably, the fixing component includes a second spring welded and installed between the two connecting pipes and located outside the fixing pipe. A second connecting plate is welded to the outside of each connecting pipe and near one side. A plurality of through holes are opened on one side of the second connecting plate. A second threaded rod is provided between the two second connecting plates through the through holes. Two second nuts are screwed onto the outside of the second threaded rod and located on the side of the first connecting plate.

[0008] Preferably, a snap-fit ​​groove is provided on the inner side of the connecting pipe, and a plurality of third springs are welded to one end of the snap-fit ​​groove. The third springs are connected to one end of the fixed pipe by welding.

[0009] Preferably, a flange is welded and installed on the side of the connecting pipe away from the fixed pipe, and the flange is used to connect to the external pipe.

[0010] Preferably, two first sealing rings are provided on the outer side of the fixed pipe.

[0011] Preferably, a second sealing ring is provided on the inner side of the connecting pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The fixed pipe serves as the main pipe, and the connecting pipe, together with the fixed and adjusting components installed on the outside, forms a complete expansion and contraction compensation structure. The various components work together to effectively solve the deformation stress problem caused by thermal expansion and contraction of steel steam pipelines under high-temperature steam transportation conditions. The connecting pipe, together with the adjusting components, can flexibly adapt to the displacement requirements of the pipeline under complex working conditions, reducing the overall stress concentration of the pipeline system. The fixed components can firmly lock the relative position of the connecting pipe and the fixed pipe, preventing the connection from loosening due to vibration.

[0013] 2. Multiple through holes are set on the first connecting plate, which, together with the first threaded rod, realize the corresponding connection of the two connecting pipes. By turning the first nut, the distance between the two connecting pipes can be flexibly adjusted to accurately adapt to the deformation requirements of the fixed pipe caused by thermal expansion and contraction. The first spring has an elastic buffering effect, which can absorb the instantaneous stress caused by temperature fluctuations and vibrations during pipe operation, further weakening the impact of deformation on the connection structure, and can also help to reset the pipe position. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a left-side sectional perspective view of the overall structure of this utility model; Figure 3 The overall structure of this utility model Figure 2 Enlarged view of point A in the middle.

[0015] In the diagram: 1. Fixed pipe; 2. Connecting pipe; 3. First connecting plate; 4. First threaded rod; 5. First nut; 6. First spring; 7. Second spring; 8. Second connecting plate; 9. Second threaded rod; 10. Second nut; 11. Snap-fit ​​groove; 12. Third spring; 13. Flange; 14. First sealing ring; 15. Second sealing ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1 Please refer to Figure 1-3 As shown, this utility model provides a steel-jacketed steam pipe joint with expansion and contraction compensation, including a fixed pipe 1, with connecting pipes 2 slidably fitted at both ends of the fixed pipe 1, an adjustment component is provided on the outside of the two connecting pipes 2, and a fixed component is provided on the inside of the adjustment component and on the outside of the connecting pipes 2 respectively, and a flange 13 is welded and installed on the side of the connecting pipe 2 away from the fixed pipe 1, the flange 13 being used to connect an external pipe.

[0018] Specifically, the fixed pipe 1 serves as the main pipe, and the connecting pipe 2, together with the fixed and adjusting components installed on the outside, forms a complete expansion and contraction compensation structure. The various components work together to effectively solve the deformation stress problem caused by thermal expansion and contraction of steel steam pipelines under high-temperature steam transportation conditions. The connecting pipe 2, together with the adjusting components, can flexibly adapt to the displacement requirements of the pipeline under complex working conditions, reducing the overall stress concentration of the pipeline system. The fixed components can firmly lock the relative position of the connecting pipe 2 and the fixed pipe 1, preventing the connection from loosening due to vibration.

[0019] The adjustment component includes a first connecting plate 3 welded and installed at the middle of the outer side of the connecting pipe 2. Multiple through holes are opened on one side of the first connecting plate 3. A first threaded rod 4 is provided between two first connecting plates 3 through the through holes. A first nut 5 is screwed and installed on the outer side of the first threaded rod 4 and on the side of the first connecting plate 3. A first spring 6 is fitted on the outer side of the first threaded rod 4.

[0020] More specifically, the multiple through holes on the first connecting plate 3, together with the first threaded rod 4, enable the corresponding connection of the two connecting pipes 2. By turning the first nut 5, the distance between the two connecting pipes 2 can be flexibly adjusted to precisely adapt to the deformation requirements of the fixed pipe 1 caused by thermal expansion and contraction. The first spring 6 has an elastic buffering effect, which can absorb the instantaneous stress caused by temperature fluctuations and vibrations during pipe operation, further weakening the impact of deformation on the connection structure, and at the same time can assist in resetting the pipe position.

[0021] As should be added, the fixing component includes a second spring 7 welded and installed between the two connecting pipes 2 and located outside the fixing pipe 1. A second connecting plate 8 is welded to the outside of each connecting pipe 2 and near one side. Multiple through holes are opened on one side of the second connecting plate 8. A second threaded rod 9 is provided between the two second connecting plates 8 through the through holes. Two second nuts 10 are screwed and installed on the outside of the second threaded rod 9 and on the side of the first connecting plate 3.

[0022] Furthermore, the second spring 7 is welded between the two connecting pipes 2, possessing good elastic buffering capacity. It can absorb small deformation stresses caused by vibration and temperature fluctuations during pipe operation, preventing stress from acting directly on the rigid connection parts. The second connecting plate 8 is welded to the outside of the connecting pipe 2 near one side, with high connection strength, providing a reliable installation carrier for the fixing components. Its multiple through holes cooperate with the second threaded rod 9 to achieve rigid locking of the two connecting pipes 2. By tightening the two second nuts 10, the clamping force of the second connecting plate 8 can be precisely adjusted to ensure the sealing of the fitting part between the connecting pipe 2 and the fixing pipe 1.

[0023] The connecting pipe 2 has a snap-fit ​​groove 11 on its inner side. Multiple third springs 12 are welded to one end of the snap-fit ​​groove 11. The third springs 12 are welded to one end of the fixed pipe 1. Two first sealing rings 14 are provided on the outer side of the fixed pipe 1, and a second sealing ring 15 is provided on the inner side of the connecting pipe 2.

[0024] Furthermore, the snap-fit ​​groove 11 provides a precise installation and positioning space for the third spring 12. One end of the third spring 12 is welded to the snap-fit ​​groove 11, and the other end is welded to one end of the fixed pipe 1, forming an elastic support structure. This structure can further absorb the relative displacement stress between the fixed pipe 1 and the connecting pipe 2, and assist the adjustment component in balancing the deformation caused by thermal expansion and contraction. The first sealing ring 14 and the second sealing ring 15 form a double sealing defense line. The first sealing ring 14 fits the mating surfaces of the fixed pipe 1 and the connecting pipe 2, and the second sealing ring 15 further fills the sealing gap, effectively blocking the leakage channel of high-temperature steam.

[0025] Working principle: First, the pipes to be connected are connected to two connecting pipes 2 through flange 13, forming a fixed channel with the fixed pipe 1. Then, the first threaded rod 4 is inserted through both ends of the two first connecting plates 3 and tightened with the first nut 5. When the fixed pipe 1 deforms due to thermal expansion and contraction, the first spring 6 provides elastic buffering to absorb the instantaneous stress during pipe operation. Then, the second threaded rod 9 is inserted through both ends of the two second connecting plates 8 and tightened with the second nut 10 to achieve locking and fixing. Then, the first sealing ring 14 and the second sealing ring 15 are used to achieve a sealed connection. Finally, steam enters the fixed pipe 1 through one of the connecting pipes 2 and then enters the other connecting pipe 2, thereby realizing the steam transportation.

[0026] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel-jacketed steam pipe joint with expansion and contraction compensation, comprising a fixed pipe (1), characterized in that: The fixed pipe (1) is slidably fitted with connecting pipes (2) at both ends. An adjustment component is provided on the outside of the two connecting pipes (2), and a fixed component is provided on the inside of the adjustment component and on the outside of the connecting pipes (2).

2. The steel-jacketed steam pipe joint with expansion compensation according to claim 1, characterized in that: The adjustment assembly includes a first connecting plate (3) welded and installed at the middle of the outside of the connecting pipe (2). The first connecting plate (3) has multiple through holes on one side. A first threaded rod (4) is provided between two first connecting plates (3) through the through holes. A first nut (5) is screwed on the outside of the first threaded rod (4) and on the side of the first connecting plate (3). A first spring (6) is fitted on the outside of the first threaded rod (4).

3. A steel-jacketed steam pipe joint with expansion and contraction compensation according to claim 2, characterized in that: The fixing component includes a second spring (7) welded between two connecting pipes (2) and located outside the fixing pipe (1). A second connecting plate (8) is welded to the outside of each connecting pipe (2) and near one side. A plurality of through holes are provided on one side of the second connecting plate (8). A second threaded rod (9) is provided between the two second connecting plates (8) through the through holes. Two second nuts (10) are screwed onto the outside of the second threaded rod (9) and located on one side of the first connecting plate (3).

4. A steel-jacketed steam pipe joint with expansion compensation according to claim 3, characterized in that: The connecting pipe (2) has a snap-fit ​​groove (11) on its inner side. Multiple third springs (12) are welded to one end of the snap-fit ​​groove (11). The third springs (12) are connected to one end of the fixed pipe (1) by welding.

5. A steel-jacketed steam pipe joint with expansion compensation according to claim 4, characterized in that: A flange (13) is welded and installed on the side of the connecting pipe (2) away from the fixed pipe (1), and the flange (13) is used to connect to the external pipe.

6. A steel-jacketed steam pipe joint with expansion compensation according to claim 5, characterized in that: Two first sealing rings (14) are provided on the outside of the fixed pipe (1).

7. A steel-jacketed steam pipe joint with expansion compensation according to claim 6, characterized in that: A second sealing ring (15) is provided on the inner side of the connecting pipe (2).

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