An online monitoring system for pressure-balanced compensators in high-pressure heating pipelines

Abstract

The present invention discloses an online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline. The online monitoring system includes a monitoring device and a control device, and the control device is electrically connected to the monitoring device. The control device is located outside the working wave outer tube and includes a thermoelectric power generation device, a control unit, and an energy storage device. The thermoelectric power generation device is arranged on a connecting tube near the free end of the working wave outer tube, and one side is tightly fitted with the outer wall of the connecting tube, and the other side is tightly fitted with a heat sink. A displacement sensor is arranged between the working wave ring plate and the end of the working wave outer tube to realize online real-time monitoring of the overall displacement of the compensator, judge whether the compensator has played a normal compensation function, and provide a basis and support for judging the overall safety status of the pipeline. By setting up a thermoelectric power generation device, when the heating pipeline is working, the heat of the heat source in the pipeline and the temperature difference of the external environment can be used to generate electricity, replenish electricity for the power supply, increase the stability of the power supply, and extend the working time of the equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of online monitoring of pipeline compensators, and in particular relates to an online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline. Background Art

[0002] A thermal pipeline is a piping system used to transport hot water, steam or other high-temperature media. It is mainly used for heat supply, heating or heat energy transmission in industrial processes. Therefore, when the thermal pipeline is working, the internal temperature will be higher than the external ambient temperature. The pipeline material will undergo linear expansion after being heated. If it is not effectively handled, it may cause stress concentration, damage to the supporting structure or deformation of the pipeline, and even cause leakage or rupture, affecting the normal operation of the pipeline.

[0003] In recent years, with the construction of long-distance heating projects, thermal power plants have become increasingly distant from urban areas. Centralized heating is supplied to cities through long-distance pipelines, which may involve large elevations in mountainous and canyon terrain. To ensure pipeline safety, pipelines are laid overhead or in tunnels. To compensate for thermal expansion and contraction of the pipeline and reduce the load on the main fixed support, the compensator must adopt a straight tube balanced structure. This type of compensator consists of two sets of working bellows and one set of balancing bellows. These bellows are numerous and complex in structure. Furthermore, compensators are often installed in remote, outdoor areas, making inspections difficult and their working status difficult to check. Leaks can be difficult to detect, posing a risk to the safe operation of the main pipeline network. Some existing monitoring equipment uses prefabricated power supplies, which require regular replacement. Others rely on solar power, but due to the complex outdoor environment, solar panels can become damaged or covered in dust, impacting power supply. Furthermore, both power supply methods are difficult and costly to maintain.

[0004] Therefore, we need to design an online monitoring system for the pressure-balanced compensator of high-pressure heating pipelines to solve these problems. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide an online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline, the pressure-balanced compensator comprising a balancing bellows, balancing bellows ring plates being respectively provided at both ends thereof, a balancing bellows outer tube being sleeved on the outer side of the balancing bellows, the balancing bellows ring plates being located within the balancing bellows outer tube and both being slidably fitted with the inner wall of the balancing bellows outer tube, a working bellows being respectively provided on the two balancing bellows ring plates, a connecting tube being inserted into the free end of the working bellows, and the free end of the working bellows being fixedly connected to the outer wall of the connecting tube, a working bellows outer tube being further sleeved on the outer side of the working bellows and the connecting tube, the working bellows outer tube being connected to the balancing bellows outer tube;

[0008] The online monitoring system includes a monitoring device and a control device, the control device is electrically connected to the monitoring device, the monitoring device includes a displacement sensor, a balanced wave humidity sensor and a working wave humidity sensor, the balanced wave humidity sensor is arranged on the balanced wave outer tube, the working wave humidity sensor is arranged on the working wave outer tube, the displacement sensor is located between the working wave outer tube and the connecting tube, and is respectively connected to the working wave outer tube and the connecting tube;

[0009] The control device includes a temperature difference power generation device, a control unit and an energy storage device. The temperature difference power generation device is arranged on a connecting tube close to the free end of the working wave outer tube, and the high temperature surface is connected to the connecting tube, and a heat sink is attached to the low temperature surface.

[0010] Preferably, a protective mechanism is also provided on the balancing bellows, and the protective mechanism includes a protective sleeve and a driving device. The protective sleeve is slidably sleeved on the outside of the free end of the working wave outer tube, and a rack is embedded on the inner wall of the protective sleeve. The driving device is located between the connecting tube and the working wave outer tube. The driving device includes a mounting bracket and a shift block. The mounting bracket is fixedly arranged on the inner wall of the working wave outer tube, and a transmission gear and a fan gear are rotatably arranged on the mounting bracket. The transmission gear is respectively engaged with the fan gear and the rack. A shift rod and a return spring are also provided on the fan gear. One end of the return spring is connected to the outer wall of the connecting tube, and the shift block is arranged on the connecting tube and is located on one side of the shift rod.

[0011] Preferably, a monitoring ring plate is mounted on the connecting tube located on the inner side of the working wave outer tube, the monitoring ring plate is fixedly connected to the outer wall of the connecting tube, and the monitoring ring plate is located between the working bellows and the mounting frame, and a working wave sealing ring is provided between the monitoring ring plate and the working wave outer tube.

[0012] Preferably, a balancing wave outer tube is mounted on the outside of the balancing wave corrugated tube, the balancing wave outer tube is connected to one of the balancing wave ring plates, the other balancing wave ring plate is located inside the balancing wave outer tube, and a balancing wave sealing ring is provided between the balancing wave outer tube and the inner wall of the balancing wave outer tube.

[0013] Preferably, the balanced wave humidity sensor is fixedly arranged on the balanced wave outer tube between the two balanced wave ring plates, the working wave humidity sensor is fixedly arranged on the working wave outer tube between the monitoring ring plate and the balanced wave ring plate, and the displacement sensor is located between the monitoring ring plate and the mounting bracket, and is fixedly connected to the monitoring ring plate and the mounting bracket.

[0014] Preferably, matching plug-in grooves are provided at opposite ends of the two connecting pipes, and the two connecting pipes are plugged into each other through the plug-in grooves at the ends.

[0015] Preferably, a connecting groove is formed through the working wave outer tube, and the transmission gear extends from the connecting groove and meshes with the rack.

[0016] Preferably, the cross-section of the heat sink is L-shaped, the thermoelectric power generation device and the control unit are both located inside the heat sink, and the control unit is connected to the heat sink.

[0017] The advantages and positive effects of the present invention are:

[0018] 1. The present invention can achieve double combined sealing of the bellows and the packing by arranging an outer tube, a ring plate, a sealing packing and a humidity sensor. The humidity sensor can also realize online monitoring and early warning of trace leakage of the working bellows and the balancing bellows. The sealing packing can also prevent the main heating pipeline from losing pressure and shutting down when a large amount of leakage occurs in the working bellows and the balancing bellows, thereby ensuring the normal operation of the heating system.

[0019] 2. The present invention realizes online real-time monitoring of the overall displacement of the compensator by setting a displacement sensor between the working wave ring plate and the end of the working wave outer tube, judges whether the compensator has played a normal compensation function, and provides a basis and support for judging the overall safety status of the pipeline.

[0020] 3. The present invention provides a temperature difference power generation device, which can generate electricity by utilizing the temperature difference between the heat source in the pipe and the external environment when the heating pipe is working, replenishing the energy storage device, increasing the power supply stability and extending the working time of the equipment.

[0021] 4. The present invention provides a driving device to amplify the deformation caused by thermal expansion and contraction of the heat dissipation pipe to drive the movement of the protective sleeve. When the pipe is in operation, the protective sleeve can be retracted to leak the radiator, thereby improving the heat dissipation effect of the internal components. When the pipe is not in operation, the internal components are protected by the protective sleeve, thereby extending the service life of the internal components and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0024] Figure 2 It is a schematic plan view of the internal structure of the present invention;

[0025] Figure 3 yes Figure 2 A schematic diagram of the structure enlargement at point A;

[0026] Figure 4 It is a schematic diagram of the connection structure of the sector gear, transmission gear and rack of the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional model of the internal structure of the present invention.

[0028] The following are the descriptions of the reference numerals:

[0029] 1. Connecting pipe; 2. Working bellows; 3. Balancing bellows; 4. Balancing bellows ring plate; 5. Heat sink; 6. Working bellows outer tube; 7. Displacement sensor; 8. Working bellows sealing ring; 9. Working bellows humidity sensor; 10. Balancing bellows outer tube; 11. Balancing bellows humidity sensor; 12. Balancing bellows sealing ring; 13. Limit block; 14. Connecting groove; 15. Return spring; 16. Rack; 17. Thermoelectric power generation device; 18. Control unit; 19. Energy storage device; 20. Monitoring ring plate; 21. Mounting bracket; 22. Heat conduction ring plate; 23. Transmission gear; 24. Plug-in slot; 25. Protective sleeve; 26. Fan gear; 27. Shift lever; 28. Shift block. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] Example: Figure 1-Figure 5 As shown, an online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline is provided. The pressure-balanced compensator includes a balancing bellows 3, with balancing wave ring plates 4 provided at both ends thereof. A balancing wave outer tube 10 is sleeved on the outer side of the balancing bellows 3. The balancing wave ring plates 4 are located inside the balancing wave outer tube 10 and are slidably fitted with the inner wall of the balancing wave outer tube 10. A working bellows 2 is provided on each of the two balancing wave ring plates 4. A connecting pipe 1 is inserted into the free end of the working bellows 2, and the free end of the working bellows 2 is fixedly connected to the outer wall of the connecting pipe 1. A working wave outer tube 6 is further sleeved on the outer side of the working bellows 2 and the connecting pipe 1, and the working wave outer tube 6 is connected to the balancing wave outer tube 10.

[0034] The online monitoring system includes a monitoring device and a control device. The control device is electrically connected to the monitoring device. The monitoring device includes a displacement sensor 7, a balanced wave humidity sensor 11, and a working wave humidity sensor 9. The balanced wave humidity sensor 11 is arranged on the balanced wave outer tube 10, and the working wave humidity sensor 9 is arranged on the working wave outer tube 6. The displacement sensor 7 is located between the working wave outer tube 6 and the connecting tube 1, and is respectively connected to the working wave outer tube 6 and the connecting tube 1.

[0035] The control device includes a thermoelectric power generation device 17, a control unit 18 and an energy storage device 19. The thermoelectric power generation device 17 is arranged on the connecting pipe 1 near the free end of the working wave outer tube 6. The thermoelectric power generation device 17 can adopt a semiconductor refrigeration plate, wherein a heat-conducting ring plate 22 is provided on the high-temperature surface of the thermoelectric power generation device 17, and the heat-conducting ring plate 22 is fixedly connected to the connecting pipe 1. The high-temperature surface of the thermoelectric power generation device 17 is tightly fitted with the heat-conducting ring plate 22. When a high-temperature medium flows through the connecting pipe 1, the heat of the high-temperature medium will increase the temperature of the connecting pipe 1, and the temperature of the heat-conducting ring plate 22 connected to the connecting pipe 1 will also increase, thereby heating the high-temperature surface of the thermoelectric power generation device 17. A heat sink 5 is attached to the low-temperature surface of the thermoelectric power generation device 17, and the surrounding environment and flowing wind are used to cool the low-temperature surface of the thermoelectric power generation device 17, so that the temperature difference on both sides of the thermoelectric power generation device 17 is increased, thereby improving the power generation performance.

[0036] A protective mechanism is also provided on the balancing bellows 3, which includes a protective sleeve 25 and a driving device. The protective sleeve 25 is slidably mounted on the outside of the free end of the working wave outer tube 6, and a rack 16 is embedded on the inner wall of the protective sleeve 25. The driving device is located between the connecting tube 1 and the working wave outer tube 6. The driving device includes a mounting bracket 21 and a shift block 28. The mounting bracket 21 is fixedly arranged on the inner wall of the working wave outer tube 6. A transmission gear 23 and a sector gear 26 are rotatably arranged on the mounting bracket 21. The transmission gear 23 is respectively engaged with the sector gear 26 and the rack 16, wherein both ends of the teeth on the sector gear 26 are provided with limit blocks 13 to prevent the sector gear 26 from disengaging from the transmission gear 23. A shift rod 27 and a return spring 15 are also provided on the sector gear 26. One end of the return spring 15 is connected to the outer wall of the connecting tube 1, and the shift block 28 is arranged on the connecting tube 1 and is located on one side of the shift rod 27.

[0037] A monitoring ring plate 20 is mounted on the connecting tube 1 located on the inner side of the working wave outer tube 6. The monitoring ring plate 20 is fixedly connected to the outer wall of the connecting tube 1 . The monitoring ring plate 20 is located between the working bellows 2 and the mounting frame 21 . A working wave sealing ring 8 is provided between the monitoring ring plate 20 and the working wave outer tube 6 .

[0038] A balancing wave outer tube 10 is mounted on the outside of the balancing wave bellows 3 . The balancing wave outer tube 10 is connected to one of the balancing wave ring plates 4 . The other balancing wave ring plate 4 is located inside the balancing wave outer tube 10 , and a balancing wave sealing ring 12 is provided between the balancing wave outer tube 10 and the inner wall thereof.

[0039] The balanced wave humidity sensor 11 is fixedly set on the balanced wave outer tube 10 between the two balanced wave ring plates 4, the working wave humidity sensor 9 is fixedly set on the working wave outer tube 6 between the monitoring ring plate 20 and the balanced wave ring plate 4, and the displacement sensor 7 is located between the monitoring ring plate 20 and the mounting frame 21, and is fixedly connected to the monitoring ring plate 20 and the mounting frame 21.

[0040] Matching inserting grooves 24 are provided at the opposite ends of the two connecting pipes 1 , and the two connecting pipes 1 are inserted into each other through the inserting grooves 24 at the ends.

[0041] A connecting groove 14 is formed through the working wave outer tube 6 , and a transmission gear 23 extends from the connecting groove 14 and meshes with the rack 16 .

[0042] The cross-section of the heat sink 5 is L-shaped. The thermoelectric power generation device 17 and the control unit 18 are both located on the inner side of the heat sink 5, and the control unit 18 is connected to the heat sink 5. The L-shaped heat sink 5 not only increases the heat dissipation area, but also can protect the energy storage device 19, the control unit 18 and the thermoelectric power generation device 17 when the protective sleeve 25 is retracted.

[0043] The working process of this embodiment is as follows: when in use, the pressure-balanced compensator is installed at the joint of two thermal pipelines through the connecting pipe 1.

[0044] When the thermal pipeline does not transmit a medium, the temperature of the thermal pipeline is the same as the ambient temperature, so there is no temperature difference at both ends of the thermoelectric power generation device 17, so no electricity is generated, and the monitoring equipment will not work. At the same time, the thermal pipeline will be in a shortened state, and the pressure balance compensator installed at the joint of the two thermal pipelines will compensate for the displacement of the thermal pipeline.

[0045] At this time, according to the principle of thermal expansion and contraction, the connecting tube 1 will shorten, and the ends of the two connecting tubes 1 will approach each other. The connecting tubes 1 approaching each other will squeeze the balancing bellows 3 through the balancing bellows ring plate 4, and at the same time stretch the working bellows 2. During this process, the working bellows outer tube 6 does not move relative to the connecting tube 1, so the return spring 15 will pull the sector gear 26 to rotate, and when the sector gear 26 rotates, it will drive the meshing transmission gear 23 to rotate. The rotation of the transmission gear 23 will push the protective sleeve 25 to move in the same direction as the connecting tube 1 through the rack 16, thereby shielding and protecting the heat sink 5.

[0046] by Figure 3Taking an example to illustrate, after the working bellows 2 is extended, the connecting tube 1 will move to the left. Since the working bellows outer tube 6 does not move relative to the connecting tube 1, the shift block 28 will move to the left, and the shift rod 27 will not be blocked by the shift block 28. Therefore, the return spring 15 will pull the sector gear 26 to rotate counterclockwise. After the sector gear 26 rotates counterclockwise, it will drive the meshing transmission gear 23 to rotate clockwise. After the transmission gear 23 rotates clockwise, it will push the meshing rack 16 to move to the left, and the protective sleeve 25 will be driven to move to the left by the rack 16, so that the heat sink 5 is covered on the inner side of the protective sleeve 25 for protection.

[0047] When the thermal pipeline transmits the medium, the heat inside the pipeline will be greater than the external ambient heat. At this time, according to the principle of thermal expansion and contraction, the connecting pipe 1 will stretch, and the ends of the two connecting pipes 1 will move away from each other. The connecting pipes 1 that move away from each other will stretch the balancing bellows 3 through the balancing bellows ring plate 4, and at the same time squeeze the working bellows 2. During this process, the working bellows outer tube 6 does not move relative to the connecting pipe 1, so the shift block 28 will push the sector gear 26 to rotate through the shift rod 27, and when the sector gear 26 rotates, it will drive the meshing transmission gear 23 to rotate in the opposite direction. The reverse rotation of the transmission gear 23 will push the protective sleeve 25 to move in the same direction as the connecting pipe 1 through the rack 16, so that the protective sleeve 25 is completely covered on the working bellows outer tube 6, so that the heat sink 5 is completely exposed, which can better exchange heat with the surrounding environment to improve the heat dissipation effect.

[0048] At the same time, when the thermal pipeline transmits the medium, the temperature of the heat-conducting ring plate 22 connected to the connecting pipe 1 will increase, so that the temperature difference at both ends of the thermoelectric power generation device 17 will become larger, so current will be generated inside the thermoelectric power generation device 17, and the current will flow into the control unit 18, wherein the energy storage device 19 is a battery. The current processed by the rectification and voltage regulation circuit of the control unit 18 will be transmitted to the energy storage device 19 for storage, realizing energy recovery, which can extend the working time of the working wave humidity sensor 9, the balanced wave humidity sensor 11 and the displacement sensor 7, and in order to further extend the service time, the working wave humidity sensor 9, the balanced wave humidity sensor 11 and the displacement sensor 7 all use low-power sensors.

[0049] When a small amount of leakage occurs in the working bellows 2 or the balancing bellows 3, the leaked hot water medium forms liquid accumulation at the lowest horizontal position of the working bellows outer tube 6 or the balancing bellows outer tube 10 and flows into the working bellows humidity sensor 9 or the balancing bellows humidity sensor 11. The working bellows humidity sensor 9 or the balancing bellows humidity sensor 11 will send a signal to the control unit 18. After receiving the signal, the control unit 18 will send a leakage warning signal to the staff. When a large amount of leakage occurs in the working bellows 2 or the balancing bellows 3, the working bellows sealing ring 8 and the balancing bellows sealing ring 12 on the outside of the monitoring ring plate 20 can prevent large amounts of leakage, prevent the main heating pipeline from losing pressure and shutting down, thereby ensuring the normal operation of the heating system and buying buffer time for maintenance.

[0050] This compensator consists of two sets of working bellows 2 and one set of balancing bellows 3, used to compensate for axial expansion and contraction of the pipeline. Its internal connection structure ensures that the displacement of the two sets of working bellows 2 is identical and equal to that of the balancing bellows 3. Therefore, to detect the actual displacement of the compensator online in real time, a displacement sensor 7 is installed on the outside of one set of working bellows 2. This enables online, real-time monitoring of the compensator's overall displacement. One end of this displacement sensor 7 is fixed to a monitoring ring plate 20, and the other end is connected to a working bellows mounting bracket 21. The actual compensation of the compensator is determined by measuring the distance between the monitoring ring plate 20 and the mounting bracket 21.

[0051] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline, characterized by: The pressure-balanced compensator comprises a balancing bellows (3), two ends of the balancing bellows (3) are respectively provided with balancing wave ring plates (4), a balancing wave outer tube (10) is sleeved on the outer side of the balancing bellows (3), the balancing wave ring plates (4) are located in the balancing wave outer tube (10), and both are slidably fitted with the inner wall of the balancing wave outer tube (10), a working bellows (2) is respectively provided on the two balancing wave ring plates (4), a connecting tube (1) is inserted into the free end of the working bellows (2), and the free end of the working bellows (2) is fixedly connected to the outer wall of the connecting tube (1), a working wave outer tube (6) is further sleeved on the outer side of the working bellows (2) and the connecting tube (1), and the working wave outer tube (6) is connected to the balancing wave outer tube (10); The online monitoring system comprises a monitoring device and a control device, wherein the control device is electrically connected to the monitoring device, and the monitoring device comprises a displacement sensor (7), a balanced wave humidity sensor (11), and a working wave humidity sensor (9). The balanced wave humidity sensor (11) is arranged on the balanced wave outer tube (10), and the working wave humidity sensor (9) is arranged on the working wave outer tube (6). The displacement sensor (7) is located between the working wave outer tube (6) and the connecting tube (1), and is respectively connected to the working wave outer tube (6) and the connecting tube (1). The control device comprises a temperature difference power generation device (17), a control unit (18) and an energy storage device (19); the temperature difference power generation device (17) is arranged on a connecting tube (1) close to the free end of the working wave outer tube (6), and the high temperature surface is connected to the connecting tube (1), and a heat sink (5) is attached to the low temperature surface; The balancing bellows (3) is also provided with a protection mechanism, which includes a protection sleeve (25) and a driving device. The protection sleeve (25) is slidably sleeved on the outside of the free end of the working bellows outer tube (6), and a rack (16) is embedded on the inner wall of the protection sleeve (25). The driving device is located between the connecting tube (1) and the working bellows outer tube (6). The driving device includes a mounting frame (21) and a shift block (28). The mounting frame (21) is fixedly arranged on the working bellows outer tube (6). On the inner wall of the wave outer tube (6), a transmission gear (23) and a sector gear (26) are rotatably arranged on the mounting frame (21), the transmission gear (23) is respectively engaged with the sector gear (26) and the rack (16), and the sector gear (26) is also provided with a shifting rod (27) and a return spring (15), one end of the return spring (15) is connected to the outer wall of the connecting tube (1), and the shifting block (28) is arranged on the connecting tube (1) and is located on one side of the shifting rod (27).

2. The online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline according to claim 1, characterized in that: A monitoring ring plate (20) is mounted on the connecting tube (1) located inside the working wave outer tube (6). The monitoring ring plate (20) is fixedly connected to the outer wall of the connecting tube (1). The monitoring ring plate (20) is located between the working bellows (2) and the mounting frame (21). A working wave sealing ring (8) is provided between the monitoring ring plate (20) and the working wave outer tube (6).

3. The online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline according to claim 1, characterized in that: A balancing wave outer tube (10) is sleeved on the outer side of the balancing wave corrugated tube (3), and the balancing wave outer tube (10) is connected to one of the balancing wave ring plates (4). The other balancing wave ring plate (4) is located inside the balancing wave outer tube (10), and a balancing wave sealing ring (12) is provided between the other balancing wave ring plate (4) and the inner wall of the balancing wave outer tube (10).

4. The online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline according to claim 2, characterized in that: The balanced wave humidity sensor (11) is fixedly arranged on the balanced wave outer tube (10) between the two balanced wave ring plates (4); the working wave humidity sensor (9) is fixedly arranged on the working wave outer tube (6) between the monitoring ring plate (20) and the balanced wave ring plate (4); and the displacement sensor (7) is located between the monitoring ring plate (20) and the mounting frame (21), and is fixedly connected to the monitoring ring plate (20) and the mounting frame (21).

5. The online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline according to claim 1, characterized in that: Matching plug-in slots (24) are provided at opposite ends of the two connecting pipes (1), and the two connecting pipes (1) are plugged into each other through the plug-in slots (24) at the ends.

6. The online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline according to claim 2, characterized in that: A connecting groove (14) is provided through the working wave outer tube (6), and the transmission gear (23) extends from the connecting groove (14) and meshes with the rack (16).

7. The online monitoring system for a pressure-balanced compensator of a high-pressure heating pipeline according to claim 1, characterized in that: The cross section of the heat sink (5) is L-shaped, the temperature difference power generation device (17) and the control unit (18) are both located inside the heat sink (5), and the control unit (18) is connected to the heat sink (5).

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