High-temperature steam pipeline compensator

Abstract

The utility model discloses a high-temperature steam pipeline compensator which comprises a corrugated pipe, flanges arranged at the two ends of the corrugated pipe and a telescopic inner sleeve assembly arranged in the corrugated pipe, one end of the inner sleeve assembly is fixedly connected with the pipe wall of the corrugated pipe, and the other end of the inner sleeve assembly is fixedly connected with the pipe wall of the corrugated pipe. The other end of the inner sleeve assembly is fixedly connected with the pipe wall of the corrugated pipe; a closed cavity is formed between the inner sleeve assembly and the corrugated pipe. The compensator is not divided into installation directions, high in installation flexibility, good in heat preservation effect and capable of preventing steam from entering the corrugated pipe and reducing heat loss.

Description

Technical Field

[0001] This utility model relates to the field of pipeline compensation technology, specifically to a high-temperature steam pipeline compensator. Background Technology

[0002] Combined heat and power (CHP) systems generate electricity and provide heat simultaneously, offering comprehensive benefits such as energy conservation, improved heating quality, and increased power supply, aligning with energy development trends. Heat generated from heat sources (such as boiler rooms or geothermal energy) is transported to user terminals via steam pipelines to meet the heating needs of various sectors, including residential and industrial applications.

[0003] High-temperature steam transported through steam pipelines experiences significant expansion during transport due to the high temperature and long distances involved, potentially leading to pipeline damage. Therefore, compensators are installed on steam pipelines to compensate for this expansion. Compensators, also known as expansion joints, are flexible elements that effectively compensate for axial deformation.

[0004] Existing compensators typically consist of an inner sleeve, a bellows, and flanges. The bellows is expandable and contracts, primarily used to compensate for thermal displacement in steam pipelines. Two flanges are installed at both ends of the bellows. The inner sleeve is located inside the bellows, mainly to prevent steam from contacting the bellows and causing turbulence. One end of the inner sleeve is welded to the bellows; this end is the fixed end. The other end of the inner sleeve is the free end, designed to allow the bellows to expand and contract. Existing compensators have strict installation requirements: the fixed end of the inner sleeve must be the inflow end, meaning steam flows in from the fixed end, allowing only unidirectional installation and limiting installation flexibility. Furthermore, the free end is not sealed to the bellows; even after installation according to requirements, steam can still enter the bellows, leading to heat loss. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned problems and provide a high-temperature steam pipeline compensator. This compensator is not limited by installation direction, has high installation flexibility, and has good heat preservation effect. It can prevent steam from entering the bellows and reduce heat loss.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A high-temperature steam pipeline compensator includes a bellows, flanges disposed at both ends of the bellows, and a retractable inner sleeve assembly disposed inside the bellows. One end of the inner sleeve assembly is fixedly connected to the wall of the bellows, and the other end of the inner sleeve assembly is fixedly connected to the wall of the bellows. A sealed cavity is formed between the inner sleeve assembly and the bellows.

[0008] The working principle of the above-mentioned high-temperature steam pipeline compensator is as follows:

[0009] The inner sleeve assembly and the bellows are both telescopic. During use, the simultaneous telescopic movement of the inner sleeve assembly and the bellows can compensate for the thermal displacement of the steam pipeline. Both ends of the inner sleeve assembly are fixedly connected to the bellows, and a sealed cavity is formed between the inner sleeve assembly and the bellows, preventing steam from entering the cavity and coming into contact with the bellows, thus reducing heat loss. At the same time, the fixed ends of the inner sleeve assembly allow for non-directional installation, regardless of the installation direction, improving installation flexibility.

[0010] In a preferred embodiment of this utility model, the inner sleeve assembly includes an inner sleeve, a middle sleeve, and a telescopic tube fitted outside the inner sleeve. One end of the inner sleeve is fixedly connected to one end of the corrugated pipe, and the other end of the inner sleeve is fitted inside the middle sleeve. One end of the telescopic tube is fixedly connected to the outer wall of the inner sleeve, and the other end of the telescopic tube is fixedly connected to one end of the middle sleeve. The other end of the middle sleeve is fixedly connected to the other end of the corrugated pipe. In the above structure, the other end of the inner sleeve is fitted inside the middle sleeve, and this end of the inner sleeve and the middle sleeve can be relative to each other. During use, the corrugated pipe and the telescopic tube extend and retract simultaneously, causing the middle sleeve and the inner sleeve to move relative to each other, thereby compensating for the steam pipeline. The inner sleeve also strengthens the rigidity of the compensator, and the telescopic tube plays a good blocking role. Even if some steam enters into the telescopic tube, it will not enter the cavity, effectively blocking and preventing heat loss.

[0011] Preferably, the inner sleeve and the middle sleeve are slidably connected. In the above structure, the inner sleeve and the middle sleeve are slidably connected, the outer diameter of the inner sleeve is the same as the inner diameter of the middle sleeve, and the inner sleeve and the middle sleeve have good sealing performance while also being able to slide, so that the inner sleeve can adapt to the expansion of the steam pipeline.

[0012] Preferably, the corrugated pipe includes a corrugated pipe body and a first end pipe and a second end pipe respectively disposed at both ends of the corrugated pipe body; one end of the first end pipe is connected to one end of the corrugated pipe body, and the other end is connected to one of the flanges; one end of the second end pipe is connected to the other end of the corrugated pipe body, and the other end is connected to another flange. The corrugated pipe is configured as a split structure, which facilitates the installation of the inner sleeve and the middle sleeve.

[0013] Preferably, the inner sleeve and the first end pipe, the telescopic pipe and the middle sleeve, the middle sleeve and the second end pipe, the first end pipe and the corrugated pipe body, and the second end pipe and the corrugated pipe body are all fixedly connected by welds. Fixed connections by welds can improve connection strength and also ensure the sealing of the connection.

[0014] Preferably, the length of the second end pipe is greater than the length of the first end pipe. The end of the inner sleeve connected to the first end pipe is a fixed end, and the end of the inner sleeve connected to the middle sleeve is a free end. The middle sleeve is fixedly connected to the second end pipe. When the steam pipe expands, the inner sleeve and the middle sleeve can slide. The length of the second end pipe is greater than the length of the first end pipe, so that the inner sleeve and the middle sleeve have a longer buffer expansion stroke, ensuring that the inner sleeve and the middle sleeve always cooperate with each other during the expansion and contraction process.

[0015] Preferably, the weld between the inner sleeve and the first end pipe, and the weld between the middle sleeve and the second end pipe, are both provided with arc-shaped transition surfaces. This is to guide the steam flow within the compensator, preventing obstruction and allowing for smoother steam flow.

[0016] Preferably, the inner sleeve has an inclined guide surface at the end that is slidably connected to the middle sleeve. This is to guide the steam flow inside the compensator, preventing obstruction and allowing for smoother steam flow.

[0017] Preferably, the first end pipe and one of the flanges are integrally formed, and the second end pipe and the other flange are also integrally formed. In the above structure, the integral form facilitates installation and processing.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The high-temperature steam pipeline compensator of this utility model has no directional requirement for installation because both ends of the inner sleeve assembly are fixedly connected to the corrugated pipe. This improves the flexibility of installation as there is no distinction between the installation directions. In addition, the inner sleeve assembly can extend and retract. When in use, the inner sleeve assembly and the corrugated pipe extend and retract simultaneously to compensate for the thermal displacement of the steam pipeline.

[0020] 2. The high-temperature steam pipeline compensator of this utility model has a sealed cavity formed between the inner sleeve assembly and the corrugated pipe, which prevents steam from entering the cavity and from coming into contact with the corrugated pipe, thereby reducing heat loss and providing a good heat preservation effect for the steam. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of one specific embodiment of a high-temperature steam pipeline compensator according to the present invention.

[0022] Figure 2 This is a front view of a high-temperature steam pipeline compensator according to the present invention.

[0023] Figure 3 This is an exploded view of a high-temperature steam pipeline compensator according to the present invention.

[0024] Figure 4 This is a cross-sectional view of a high-temperature steam pipeline compensator according to the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the inner sleeve assembly in this utility model.

[0026] Figure 6 This is a cross-sectional view of the inner sleeve assembly in this utility model.

[0027] Figure 7 This is an exploded view of the inner sleeve assembly in this utility model.

[0028] Figure 8 This is a three-dimensional structural diagram of the inner sleeve and telescopic tube in this utility model. Detailed Implementation

[0029] To enable those skilled in the art to fully understand the technical solution of this utility model, the present utility model will be further described below in conjunction with the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0030] See Figures 1-8 This embodiment discloses a high-temperature steam pipeline compensator, including a bellows 1, flanges 2 disposed at both ends of the bellows 1, and a retractable inner sleeve assembly 3 disposed inside the bellows 1. One end of the inner sleeve assembly 3 is fixedly connected to the wall of the bellows 1, and the other end of the inner sleeve assembly 3 is fixedly connected to the wall of the bellows 1; a sealed cavity is formed between the inner sleeve assembly 3 and the bellows 1.

[0031] See Figures 1-8 The inner sleeve assembly 3 includes an inner sleeve 3-1, a middle sleeve 3-2, and a telescopic tube 3-3 sleeved on the outside of the inner sleeve 3-1; one end of the inner sleeve 3-1 is fixedly connected to one end of the corrugated pipe 1, and the other end of the inner sleeve 3-1 is sleeved on the inner side of the middle sleeve 3-2; one end of the telescopic tube 3-3 is fixedly connected to the outer wall of the inner sleeve 3-1, and the other end of the telescopic tube 3-3 is fixedly connected to one end of the middle sleeve 3-2, and the other end of the middle sleeve 3-2 is fixedly connected to the other end of the corrugated pipe 1. In the above structure, the other end of the inner sleeve 3-1 is fitted inside the middle sleeve 3-2. This end of the inner sleeve 3-1 and the middle sleeve 3-2 can be relative to each other. During use, the bellows 1 and the telescopic pipe 3-3 extend and retract simultaneously, causing the middle sleeve 3-2 and the inner sleeve 3-1 to move relative to each other, thereby compensating for the steam pipeline. The inner sleeve 3-1 can also strengthen the rigidity of the compensator. The telescopic pipe 3-3 can play a good blocking role. Even if some steam enters into the telescopic pipe 3-3, it will not enter the cavity, thus effectively blocking and preventing heat loss.

[0032] See Figures 1-8 The inner sleeve 3-1 and the middle sleeve 3-2 are slidably connected. In the above structure, the inner sleeve 3-1 and the middle sleeve 3-2 are slidably connected, the outer diameter of the inner sleeve 3-1 is the same as the inner diameter of the middle sleeve 3-2, and the inner sleeve 3-1 and the middle sleeve 3-2 have good sealing performance while also being able to slide, so that the inner sleeve 3-1 can adapt to the expansion of the steam pipeline.

[0033] See Figures 1-8 The corrugated pipe 1 includes a corrugated pipe body 1-1 and a first end pipe 1-2 and a second end pipe 1-3 respectively disposed at both ends of the corrugated pipe body 1-1. One end of the first end pipe 1-2 is connected to one end of the corrugated pipe body 1-1, and the other end is connected to one of the flanges 2. One end of the second end pipe 1-3 is connected to the other end of the corrugated pipe body 1-1, and the other end is connected to the other flange 2. The corrugated pipe 1 is configured as a split structure, which facilitates the installation of the inner sleeve 3-1 and the middle sleeve 3-2.

[0034] See Figures 1-8 The inner sleeve 3-1 and the first end pipe 1-2, the telescopic pipe 3-3 and the middle sleeve 3-2, the middle sleeve 3-2 and the second end pipe 1-3, the first end pipe 1-2 and the corrugated pipe body 1-1, and the second end pipe 1-3 and the corrugated pipe body 1-1 are all fixedly connected by welds 4. This fixed connection via welds 4 improves connection strength and ensures a tight seal.

[0035] See Figures 1-8 In this embodiment, the inner sleeve 3-1 and the telescopic tube 3-3 can be an integral structure or fixed by welding. The telescopic tube 3-3 is a corrugated telescopic tube 3-3. One end of the telescopic tube 3-3 is connected to the outer surface of the inner sleeve 3-1, and the remaining part of the telescopic tube 3-3 has a gap with the inner sleeve 3-1. The purpose of this gap is to facilitate the expansion and contraction of the telescopic tube 3-3. The troughs of the telescopic tube 3-3 can also fit against the outer surface of the inner sleeve 3-1 to improve sealing and prevent steam from entering between the telescopic tube 3-3 and the inner sleeve 3-1.

[0036] See Figures 1-8 The length of the second end pipe 1-3 is greater than the length of the first end pipe 1-2. The end of the inner sleeve 3-1 connected to the first end pipe 1-2 is a fixed end, and the end of the inner sleeve 3-1 connected to the middle sleeve 3-2 is a free end. The middle sleeve 3-2 is fixedly connected to the second end pipe 1-3. When the steam pipe expands, the inner sleeve 3-1 and the middle sleeve 3-2 can slide. The length of the second end pipe 1-3 is greater than the length of the first end pipe 1-2, so that the inner sleeve 3-1 and the middle sleeve 3-2 have a longer buffer expansion stroke, ensuring that the inner sleeve 3-1 and the middle sleeve 3-2 always cooperate with each other during the expansion and contraction process.

[0037] See Figures 1-8 The weld 4 between the inner sleeve 3-1 and the first end pipe 1-2, and the weld 4 between the middle sleeve 3-2 and the second end pipe 1-3, are both provided with arc transition surfaces. The purpose is to guide the steam flow inside the compensator, preventing obstruction and allowing for smoother steam flow.

[0038] See Figures 1-8 The inner sleeve 3-1 has an inclined guide surface at one end that is slidably connected to the middle sleeve 3-2. The purpose of this is to guide the steam flow inside the compensator, preventing obstruction and allowing for smoother steam flow.

[0039] See Figures 1-8 The first end pipe 1-2 and one of the flanges 2 are integrally formed, and the second end pipe 1-3 and the other flange 2 are also integrally formed. In the above structure, the integral form facilitates installation and processing.

[0040] See Figures 1-8 Weld 4 is formed by welding. The bellows 1 is a split type and is installed by welding. The entire installation process of the compensator is as follows: First, the telescopic pipe 3-3 is installed on the inner sleeve 3-1. If it is an integral type, this step is omitted. Next, the telescopic pipe 3-3 is welded to the middle sleeve 3-2 to form the inner sleeve assembly 3. Then, the inner sleeve 3-1 is inserted into the first end pipe 1-2, and the end of the inner sleeve 3-1 is welded to the wall of the first end pipe 1-2. Then, the bellows body 1-1 is placed on the outside of the inner sleeve assembly 3, and the second end pipe 1-3 is also placed on the outside of the inner sleeve assembly 3, specifically, on the outside of the middle sleeve 3-2. Next, the bellows body 1-1 is welded to the first end pipe 1-2, and then the bellows body 1-1 is welded to the second end pipe 1-3. Finally, the end of the middle sleeve 3-2 is welded to the wall of the second end pipe 1-3, thus completing the installation of the compensator.

[0041] See Figures 1-8 The inner sleeve 3-1 has a relatively thin wall, which can be less than 1mm thick. This is to prevent excessive thickness from causing turbulence and to ensure smooth steam delivery.

[0042] See Figures 1-8 The working principle of the above-mentioned high-temperature steam pipeline compensator is as follows:

[0043] The inner sleeve assembly 3 is telescopic, and the bellows 1 is also telescopic. In use, the simultaneous telescopic movement of the inner sleeve assembly 3 and the bellows 1 can compensate for the thermal displacement of the steam pipeline. Both ends of the inner sleeve assembly 3 are fixedly connected to the bellows 1, and a sealed cavity is formed between the inner sleeve assembly 3 and the bellows 1, so that steam will not enter the cavity and will not come into contact with the bellows 1, thus reducing heat loss. At the same time, the fixed ends of the inner sleeve assembly 3 make the installation non-directional, regardless of the installation direction, thus improving the flexibility of installation.

[0044] The above are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A high-temperature steam pipeline compensator, characterized in that, The device includes a bellows, flanges at both ends of the bellows, and a retractable inner sleeve assembly disposed inside the bellows. One end of the inner sleeve assembly is fixedly connected to the wall of the bellows, and the other end of the inner sleeve assembly is fixedly connected to the wall of the bellows. A sealed cavity is formed between the inner sleeve assembly and the bellows.

2. A high-temperature steam pipeline compensator according to claim 1, characterized in that, The inner sleeve assembly includes an inner sleeve, a middle sleeve, and a telescopic tube sleeved on the outside of the inner sleeve; one end of the inner sleeve is fixedly connected to one end of the corrugated tube, and the other end of the inner sleeve is sleeved on the inner side of the middle sleeve; one end of the telescopic tube is fixedly connected to the outer wall of the inner sleeve, and the other end of the telescopic tube is fixedly connected to one end of the middle sleeve, and the other end of the middle sleeve is fixedly connected to the other end of the corrugated tube.

3. A high-temperature steam pipeline compensator according to claim 2, characterized in that, The inner sleeve and the middle sleeve are slidably connected.

4. A high-temperature steam pipeline compensator according to claim 2, characterized in that, The corrugated pipe includes a corrugated pipe body and a first end pipe and a second end pipe respectively disposed at both ends of the corrugated pipe body; one end of the first end pipe is connected to one end of the corrugated pipe body and the other end is connected to one of the flanges, and one end of the second end pipe is connected to the other end of the corrugated pipe body and the other end is connected to another flange.

5. A high-temperature steam pipeline compensator according to claim 4, characterized in that, The inner sleeve and the first end pipe, the telescopic pipe and the middle sleeve, the middle sleeve and the second end pipe, the first end pipe and the corrugated pipe body, and the second end pipe and the corrugated pipe body are all fixedly connected by welds.

6. A high-temperature steam pipeline compensator according to claim 4, characterized in that, The length of the second end tube is greater than the length of the first end tube.

7. A high-temperature steam pipeline compensator according to claim 5, characterized in that, The weld between the inner sleeve and the first end pipe, as well as the weld between the middle sleeve and the second end pipe, are provided with arc transition surfaces.

8. A high-temperature steam pipeline compensator according to claim 7, characterized in that, The inner sleeve has an inclined guide surface at one end that is slidably connected to the middle sleeve.

9. A high-temperature steam pipeline compensator according to claim 4, characterized in that, The first end pipe and one of the flanges are an integral structure, and the second end pipe and the other flange are also an integral structure.

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