Pipe compensation device for electromechanical equipment maintenance

Abstract

The application discloses a pipeline compensation device for electromechanical equipment maintenance, which comprises an inlet joint, an outlet joint and two sleeve compensators between the inlet joint and the outlet joint. The two ends of the two sleeve compensators are communicated with the inlet joint and the outlet joint through reversing valves respectively, and the axial center lines of the two sleeve compensators are parallel to each other. The pipeline compensation device for electromechanical equipment maintenance can complete the maintenance and replacement of the pipeline compensator without affecting the normal flow of fluid in the pipeline.

Description

Technical Field

[0001] This invention relates to the technical field of pipeline compensation equipment, specifically a pipeline compensation device for the maintenance of electromechanical equipment. Background Technology

[0002] Pipeline compensators, also known as expansion joints or expansion couplings, are primarily used to compensate for the thermal expansion and contraction of pipelines caused by temperature changes. If a pipeline cannot expand or contract freely during temperature changes, thermal stress will be generated within it. This stress must be considered in pipeline design; otherwise, it may lead to pipeline rupture and disrupt normal production. As an important component of pipeline engineering, compensators play a crucial role in ensuring the long-term normal operation of pipelines.

[0003] The most widely used pipe compensators are metal bellows compensators and sleeve compensators. Metal bellows compensators achieve length compensation by stretching the bellows; however, the expansion and contraction of pipelines due to temperature changes is repeated, leading to metal fatigue and affecting the service life of the compensator. Similarly, for sleeve compensators, such as… Figure 1 As shown, it also uses the sealing filler material 1-3 between the sleeve 1-2 and the core tube 1-1 for sealing. During the expansion or contraction of the pipeline, the sealing filler material 1-3 will repeatedly rub against the side wall of the sleeve 1-2 or the core tube 1-1. Therefore, the sealing filler material 1-3 is also very easy to wear, which will eventually affect the service life of the sleeve compensator.

[0004] In summary, the service life of existing metal bellows compensators and sleeve compensators is far shorter than that of the pipeline itself. Therefore, it is necessary to periodically close the valves upstream of the pipeline for the maintenance of various pipeline compensators. Obviously, the pipeline valves need to be closed in advance during the maintenance process, which not only affects the use of the pipeline, but also brings inconvenience to the maintenance. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art: to provide a pipeline compensation device for the maintenance of electromechanical equipment, which can complete the maintenance and replacement of the pipeline compensator without affecting the normal flow of fluid in the pipeline.

[0006] Therefore, one object of the present invention is to provide a pipeline compensation device for the maintenance of electromechanical equipment, which includes an inlet joint and an outlet joint, and two sleeve compensators located between the inlet joint and the outlet joint. The two ends of the two sleeve compensators are respectively connected to the inlet joint and the outlet joint through a reversing valve, and the two sleeve compensators are parallel to each other along their axial center lines.

[0007] The above technical solution has the following advantages or beneficial effects: when one of the sleeve compensators fails, the fluid in the pipeline can be made to flow through the other sleeve compensator through the reversing valve, thereby making it easy to disassemble and replace the failed sleeve compensator, and the normal flow of fluid in the pipeline will not be affected during the process.

[0008] According to one embodiment of the present invention, the sleeve compensator includes an inner tube and an outer tube, one end of the outer tube being sleeved over one end of the inner tube, and an annular sealing ring assembly is provided between the outer tube and the inner tube.

[0009] According to one embodiment of the present invention, the sealing ring assembly includes an inner sealing ring, an outer sealing ring fitted over the inner sealing ring, and a rolling ring located between the inner and outer sealing rings. The rolling ring is made of an elastic material and has a hollow annular structure, such that its inner cavity is annular. When the outer and inner tubes expand or contract in the length direction due to temperature changes, the inner and outer sealing rings compensate for the length through the rolling of the rolling ring. During this process, there is no sliding friction between the rolling ring and the inner and outer sealing rings, resulting in low friction loss. Furthermore, the rolling ring can better isolate the spaces on both sides, thus achieving a sealing effect.

[0010] According to an example of the present invention, the inner sealing ring has a left limit position and a right limit position relative to the outer sealing ring along the axial direction, and a linkage component is provided between the inner sealing ring and the outer sealing ring. The linkage component is configured to drive the outer sealing ring to move to the left synchronously when the inner sealing ring moves to the left limit position, and to drive the outer sealing ring to move to the right synchronously when the inner sealing ring moves to the right limit position.

[0011] According to an example of the present invention, the linkage component includes an outer linkage rod and an inner linkage rod disposed on one side of the inner sealing ring. The proximal end of the outer linkage rod is fixed to the outer sealing ring and extends radially inward to form a first baffle. The distal end of the outer linkage rod extends radially inward to form a second baffle. The proximal end of the inner linkage rod is fixed to the inner sealing ring, and the distal end has a third baffle extending radially outward between the first and second baffles. When the inner sealing ring is in the left and right extreme positions, the third baffle abuts against the first baffle or the second baffle, respectively. During routine pipeline operation, length compensation can be achieved through the rolling of the rolling ring, thereby ensuring sealing performance and significantly improving the service life of the sleeve compensator. When a significant temperature change occurs within the pipeline, the linkage component can drive the inner and outer sealing rings to move synchronously, enabling the sleeve compensator to adaptively adjust to the new operating temperature. Furthermore, at the new operating temperature, the rolling ring can still perform length compensation based on temperature fluctuations under the new stable operating conditions.

[0012] According to one example of the present invention, the linkage component is located on the side of the inner sealing ring near the outer tube opening.

[0013] According to one example of the invention, the inner surface of the outer sealing ring has a plurality of annular protrusions or annular grooves.

[0014] According to one example of the present invention, the inner surface of the outer sealing ring has a plurality of annular grooves arranged at intervals along the axial direction, wherein the width d1 at the groove opening position of the annular groove is smaller than the width d2 at the middle position of the groove.

[0015] According to one example of the present invention, the inner wall of the annular groove is connected to the groove opening and the groove bottom by a circular arc surface transition.

[0016] According to one embodiment of the present invention, the outer tube includes a sleeve section fitted over the inner tube and a narrowing section with a diameter equal to that of the inner tube. The sleeve section and the narrowing section are connected by a conical transition surface, the conical surface being coated with an insulating coating. The end of the inner tube located inside the sleeve section has a pointed tip. Both the inner tube and the outer tube are made of metal. An alarm is provided on the outside of the outer tube. The alarm is electrically connected to both the outer tube and the inner tube. When the pointed tip of the inner tube penetrates the insulating coating and contacts the outer tube, the alarm is in an energized alarm state.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the existing bushing compensator.

[0019] Figure 2 This is a schematic diagram of the structure of the pipeline compensation device for the maintenance of electromechanical equipment according to the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the casing compensator in a pipeline compensation device.

[0021] Figure 4 for Figure 3 An enlarged schematic diagram of the location of the intermediate sleeve compensator.

[0022] Figure 5 for Figure 4 A magnified view of a portion of region "A".

[0023] Among them, 100 is the inlet connector; 200 is the outlet connector; 300 is the sleeve compensator; and 400 is the reversing valve. 1. Inner tube; 1.1. Tip; 2. Outer tube; 2.1. Sleeve section; 2.2. Narrowing section; 2.3. Conical surface; 2.3.1. Insulating coating; 3. Inner sealing ring; 4. Outer sealing ring; 5. Rolling ring; 6. Outer linkage rod; 7. Inner linkage rod; 8. First baffle; 9. Second baffle; 10. Third baffle; 11. Annular groove; 12. Alarm. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] Existing pipeline compensators are mainly classified into several categories according to their structure: metal bellows compensators, non-metallic compensators, and sleeve compensators. Metal bellows compensators achieve axial length compensation through the expansion and contraction of the bellows. However, the expansion and contraction of the metal bellows with changes in pipeline temperature causes metal deformation, and repeated deformation can lead to metal fatigue, thus affecting the service life of the compensator. Non-metallic compensators achieve axial length compensation through the extension of non-metallic materials. The disadvantages of this type of compensator are its limited extension length and inability to be used in high-pressure pipelines. Furthermore, these elastic non-metallic materials are prone to aging over time, resulting in a generally shorter service life. As for sleeve compensators, such as... Figure 1 As shown, the expansion joint achieves length compensation and seal simultaneously through the sealing filler material 1-3 between the sleeve 1-2 and the core tube 1-1. However, since the temperature change of the pipeline occurs in real time, especially for outdoor pipelines where the temperature difference between day and night is continuous and alternating, the sealing filler material 1-3 will repeatedly slide and rub against the sleeve 1-2 and the core tube 1-1. This sliding friction easily causes wear of the sealing filler material, thus the service life of this type of sleeve expansion joint is not ideal. Furthermore, in daily use, if the above-mentioned expansion joints fail and need repair or replacement, the upstream valve of the pipeline must be closed to complete the replacement of the entire expansion joint. This process not only brings inconvenience to maintenance, but also directly affects the continuous use of the pipeline, especially for some important electromechanical equipment, where the economic impact of downtime for pipeline maintenance is huge. Therefore, this embodiment aims to find a pipeline compensation device with a longer service life than existing expansion joints, and this pipeline compensation device will not cause the entire external pipeline to be closed during maintenance and replacement, ensuring that the pipeline remains unobstructed.

[0026] The following describes in detail, with reference to the accompanying drawings, a pipe compensation device for maintenance of electromechanical equipment according to an embodiment of the present invention.

[0027] This invention provides a pipeline compensation device for the maintenance of electromechanical equipment, such as... Figure 2 As shown, it includes an inlet connector 100 and an outlet connector 200, and two sleeve compensators 300 located between the inlet connector 100 and the outlet connector 200. The two sleeve compensators 300 are arranged side by side. The two ends of the two sleeve compensators 300 are connected to the inlet connector 100 and the outlet connector 200 respectively through a reversing valve 400. That is, the front end of the two sleeve compensators 300 is connected to the inlet connector 100 through the first reversing valve 400, and the rear end of the two sleeve compensators 300 is connected to the outlet connector 200 through the second reversing valve 400. The two sleeve compensators 300 are parallel to each other along their axial center lines. Therefore, during daily use, the two sleeve compensators 300 can extend or contract synchronously to achieve the purpose of compensating for the length of the pipeline. When one of the sleeve compensators 300 is damaged and needs to be replaced, it is only necessary to adjust the reversing valve 400 to close the pipeline where the damaged sleeve compensator 300 is located, so as to facilitate the replacement of the damaged sleeve compensator 300. During this process, the fluid in the pipeline can be smoothly transported through the other adjacent normal sleeve compensator 300.

[0028] Preferably, the reversing valve 400 is a three-way reversing valve 400, the first reversing valve 400 is a three-way reversing valve 400 with one inlet and two outlets, and the second reversing valve 400 is a three-way reversing valve 400 with two inlets and one outlet.

[0029] like Figure 3 As described above, based on the preferred embodiment of the sleeve compensator 300, the sleeve compensator 300 includes an inner tube 1 and an outer tube 2, one end of the outer tube 2 is sleeved outside one end of the inner tube 1, and there is a gap between the outer tube 2 and the inner tube 1. An annular sealing ring assembly is provided in the gap for sealing the gap between the outer tube 2 and the inner tube 1.

[0030] Specifically, the sealing ring assembly in the above embodiments includes an inner sealing ring 3, an outer sealing ring 4 fitted over the inner sealing ring 3, and a rolling ring 5 located between the inner sealing ring 3 and the outer sealing ring 4. The inner sealing ring 3 and the outer sealing ring 4 are made of existing conventional sealing materials, and the rolling ring 5 is made of an elastic material, and as... Figure 3 and Figure 4As shown, the rolling ring 5 is a hollow annular structure, making its inner cavity annular. In this embodiment, the outer surface of the rolling ring 5 is in contact with the outer surface of the inner sealing ring 3 and the inner surface of the outer sealing ring 4, respectively. As the inner tube 1 and the outer tube 2 move relative to each other due to static friction, the rolling ring 5 rolls between the inner sealing ring 3 and the outer sealing ring 4. In this embodiment, in addition to maintaining the sealing isolation between the two sides of the sealing ring assembly, the presence of the rolling ring 5 eliminates sliding friction between the rolling ring 5 and both the inner sealing ring 3 and the outer sealing ring 4, resulting in friction loss far less than that of conventional sleeve compensators. Therefore, this embodiment has a longer service life.

[0031] In the above embodiments, theoretically, the inner sealing ring 3 and the outer sealing ring 4 can be infinitely long along the axial direction, allowing the rolling ring 5 to roll arbitrarily along the axial direction. However, in actual use, the axial length is limited. Therefore, based on the preferred embodiment described above, this embodiment is improved in that: the inner sealing ring 3 has a left limit position and a right limit position relative to the outer sealing ring 4 along the axial direction; a linkage component is provided between the inner sealing ring 3 and the outer sealing ring 4. This linkage component is configured to drive the outer sealing ring 4 to move synchronously to the left when the inner sealing ring 3 moves to the left limit position, and to drive the outer sealing ring 4 to move synchronously to the right when the inner sealing ring 3 moves to the right limit position. Initially, the maximum travel distance of the inner sealing ring 3 relative to the outer sealing ring 4 is preset, thereby calculating the left and right limit positions, and thus determining the dimensions of the linkage component. Figure 4 The position shown is the initial position. When the inner sealing ring 3 moves to the left limit position and needs to continue moving to the left, the linkage component drives the outer sealing ring 4 to move to the left synchronously. Conversely, when the inner sealing ring 3 moves to the right limit position and needs to continue moving to the right, the linkage component drives the outer sealing ring 4 to move to the right synchronously. The advantage of this embodiment is that within the normal temperature variation range, the position compensation between the inner sealing ring 3 and the outer sealing ring 4 can be achieved by the rolling of the rolling ring 5. This process involves minimal wear and a long service life. When the temperature changes significantly, such as changes in the fluid in the pipeline or extreme weather, the linkage component can overcome the static friction between the inner sealing ring 3 and the outer sealing ring 4 and the corresponding outer or inner pipe, thereby driving the inner sealing ring 3 and the outer sealing ring 4 to move synchronously. After moving to the correct position, the rolling ring 5 can still be adjusted for length compensation due to normal temperature changes. For example, when a pipe that was originally used for warm water is changed to carry hot water or steam, the temperature difference of the fluid inside the pipe is huge. As the pipe expands due to heat, the inner sealing ring 3 moves beyond the limit position of the rolling ring 5. At this time, the linkage component can drive the inner sealing ring 3 and the outer sealing ring 4 to move synchronously until the pipe expands to a stationary state. Then, the rolling ring 5 can play a role in length compensation at that temperature as the temperature fluctuates.

[0032] Preferred examples based on the above-mentioned linkage components: such as Figure 4 As shown, the linkage component includes an outer linkage rod 6 and an inner linkage rod 7 disposed on one side of the inner sealing ring 3. The proximal end of the outer linkage rod 6 is fixed to the outer sealing ring 4 and extends radially inward to form a first baffle 8. The distal end of the outer linkage rod 6 extends radially inward to form a second baffle 9. The proximal end of the inner linkage rod 7 is fixed to the inner sealing ring 3, and the distal end has a third baffle 10 extending radially outward to the space between the first baffle 8 and the second baffle 9. When the inner sealing ring 3 is in the left extreme position, the third baffle 10 abuts against the second baffle 9; when the inner sealing ring 3 is in the right extreme position, the third baffle 10 abuts against the first baffle 8.

[0033] Preferably, such as Figure 4 As shown, the linkage component is located on the side of the inner sealing ring 3 near the opening of the outer tube 2.

[0034] like Figure 5 As shown, the inner surface of the outer sealing ring 4 has several annular protrusions or annular grooves 11. Since the rolling ring 5 rolls during normal operation, particles in the fluid within the pipeline can easily enter between the rolling ring 5 and the inner sealing ring 3 and outer sealing ring 4, affecting the sealing performance. This is especially true for fluid media that inherently contain particles, such as graphene slurry, or pharmaceutical agents containing large molecular particles in the biopharmaceutical field. Therefore, in this embodiment, the annular protrusions or annular grooves 11 create areas of higher pressure and lower pressure at the contact surfaces between the outer surface of the rolling ring 5 and the corresponding inner sealing ring 3 and outer sealing ring 4. This allows particles in the fluid to concentrate in the lower pressure areas, thereby ensuring the sealing performance between the rolling ring 5 and the inner sealing ring 3 and outer sealing ring 4 in the higher pressure areas.

[0035] Based on the preferred embodiments described above, such as Figure 5 As shown, the inner side of the outer sealing ring 4 has a plurality of annular grooves 11 arranged at intervals along the axial direction. The width d1 of the groove opening of the annular groove 11 is smaller than the width d2 of the middle position inside the groove.

[0036] Furthermore, the inner wall of the annular groove 11 is connected to the groove opening and to the groove bottom via a circular arc surface transition. In this embodiment, a cavity is formed within the annular groove 11, allowing particles in the fluid to be contained within the annular groove 11, reducing the impact on the sealing performance between the rolling ring 5 and the outer sealing ring 4. Secondly, the groove opening has a smaller width d1, while the inner groove has a larger width d2. This is due to the partial elastic deformation of the rolling ring 5, which squeezes it into the annular groove 11. This effectively prevents slippage between the rolling ring 5 and the outer sealing ring 4, and the squeezing of the rolling ring 5 into the annular groove 11 improves the sealing performance of the contact surfaces between them. Finally, the pipeline is installed both horizontally and vertically. Figure 5 The diagram shows a horizontally arranged pipe. A vertically arranged pipe is rotated 90° along the paper. When the pipe is installed vertically, the wider design of the middle position of the annular groove 11 prevents particles in the annular groove 11 from entering the groove opening, thereby keeping the particles away from the contact surface between the rolling ring 5 and the outer sealing ring 4 and improving the sealing performance.

[0037] like Figure 3 As shown, the outer tube 2 includes a sleeve section 2.1 that fits over the inner tube 1 and a narrowed section 2.2 with a diameter equal to that of the inner tube 1. The sleeve section 2.1 and the narrowed section 2.2 are connected by a conical surface 2.3. The conical surface 2.3 is coated with an insulating coating 2.3.1. The end of the inner tube 1 located inside the sleeve section 2.1 has a pointed tip 1.1. Both the inner tube 1 and the outer tube 2 are made of metal. An alarm 12 is provided on the outside of the outer tube 2. The alarm 12 is electrically connected to both the outer tube 2 and the inner tube 1. When the pointed tip 1.1 of the inner tube 1 penetrates the insulating coating 2.3.1 and comes into contact with the outer tube 2, the alarm 12 is in an energized alarm state. The alarm 12 has a signal transmission module. When the tip 1.1 of the inner tube 1 penetrates the insulating coating 2.3.1 and comes into contact with the outer tube 2, an electrical circuit is formed between the inner tube 1, the outer tube 2, and the alarm 12. At this time, the signal transmission module of the alarm 12 sends out a detection signal. The alarm 12 is wirelessly connected to the remote control center, so that the remote control center can receive the detection signal and thus know that the corresponding numbered bushing compensator has an overtravel fault, so as to repair and replace it in time.

[0038] It should be noted that in the description of this invention, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0044] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be construed as covering all changes and modifications that encompass the true intent and scope of the invention. Any and all equivalent scope and content within the scope of the claims should be considered to remain within the intent and scope of the invention.

Claims

1. A pipeline compensation device for the maintenance of electromechanical equipment, characterized in that: It includes an inlet connector (100) and an outlet connector (200), and two sleeve compensators (300) located between the inlet connector (100) and the outlet connector (200). The two ends of the two sleeve compensators (300) are respectively connected to the inlet connector (100) and the outlet connector (200) through a three-way reversing valve (400), and the two sleeve compensators (300) are parallel to each other along the axial centerline. The sleeve compensator (300) includes an inner tube (1) and an outer tube (2), one end of the outer tube (2) is sleeved outside one end of the inner tube (1), and an annular sealing ring assembly is provided between the outer tube (2) and the inner tube (1); The sealing ring assembly includes an inner sealing ring (3), an outer sealing ring (4) fitted outside the inner sealing ring (3), and a rolling ring (5) located between the inner sealing ring (3) and the outer sealing ring (4). The rolling ring (5) is made of an elastic material and has a hollow annular structure so that the inner cavity of the rolling ring (5) is annular. The inner sealing ring (3) has a left limit position and a right limit position relative to the outer sealing ring (4) along the axial direction. A linkage component is provided between the inner sealing ring (3) and the outer sealing ring (4). The linkage component is configured to drive the outer sealing ring (4) to move to the left synchronously when the inner sealing ring (3) moves to the left limit position, and to drive the outer sealing ring (4) to move to the right synchronously when the inner sealing ring (3) moves to the right limit position.

2. The pipeline compensation device for electromechanical equipment maintenance according to claim 1, characterized in that: The linkage component includes an outer linkage rod (6) and an inner linkage rod (7) located on one side of the inner sealing ring (3). The proximal end of the outer linkage rod (6) is fixed to the outer sealing ring (4) and extends radially inward to form a first baffle (8). The distal end of the outer linkage rod (6) extends radially inward to form a second baffle (9). The proximal end of the inner linkage rod (7) is fixed to the inner sealing ring (3), and the distal end has a third baffle (10) extending radially outward to the space between the first baffle (8) and the second baffle (9). When the inner sealing ring (3) is in the left limit position and the right limit position, the third baffle (10) abuts against the first baffle (8) or the second baffle (9) respectively.

3. The pipeline compensation device for electromechanical equipment maintenance according to claim 2, characterized in that: The linkage component is located on the side of the inner sealing ring (3) near the opening of the outer tube (2).

4. The pipeline compensation device for maintenance of electromechanical equipment according to claim 1, characterized in that: The inner surface of the outer sealing ring (4) has several annular protrusions and / or annular grooves (11).

5. The pipeline compensation device for electromechanical equipment maintenance according to claim 4, characterized in that: The inner side of the outer sealing ring (4) has several annular grooves (11) arranged at intervals along the axial direction. The width d1 of the groove opening of the annular groove (11) is smaller than the width d2 of the middle position inside the groove.

6. The pipeline compensation device for maintenance of electromechanical equipment according to claim 5, characterized in that: The inner wall of the annular groove (11) is connected to the groove opening and the groove bottom by a circular arc surface.

7. The pipeline compensation device for maintenance of electromechanical equipment according to claim 1, characterized in that: The outer tube (2) includes a sleeve section (2.1) that fits over the inner tube (1) and a narrow section (2.2) with a diameter equal to that of the inner tube (1). The sleeve section (2.1) and the narrow section (2.2) are connected by a conical surface (2.3). The conical surface (2.3) is coated with an insulating coating (2.3.1). The end of the inner tube (1) located inside the sleeve section (2.1) has a pointed tip (1.1). Both the inner tube (1) and the outer tube (2) are made of metal. An alarm (12) is provided on the outside of the outer tube (2). The alarm (12) is electrically connected to the outer tube (2) and the inner tube (1). When the pointed tip (1.1) of the inner tube (1) penetrates the insulating coating (2.3.1) and comes into contact with the outer tube (2), the alarm (12) is in an energized alarm state.

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