Online monitoring system for pressure balance type compensator of high-pressure heat supply pipeline

Abstract

The invention discloses an online monitoring system for a pressure balance type compensator of a high-pressure heat supply pipeline, the online monitoring system comprises a monitoring device and a control device, and the control device is electrically connected with the monitoring device; the control device is located on the outer side of the working wave outer pipe and comprises a thermoelectric power generation device, a control unit and an energy storage device, the thermoelectric power generation device is arranged on the connecting pipe close to the free end of the working wave outer pipe, one face of the thermoelectric power generation device is tightly attached to the outer wall of the connecting pipe, and cooling fins are tightly attached to the other face of the thermoelectric power generation device. A displacement sensor is arranged between the working wave ring plate and the tail end of the working wave outer pipe, online real-time monitoring of overall displacement of the compensator is achieved, whether the compensator plays a normal compensation function or not is judged, and basis and support are provided for judging the overall safety state of the pipeline. The thermoelectric power generation device can generate power through the temperature difference between heat of a heat source in the pipeline and the external environment when the heat supply pipeline works, electric energy is supplemented for the power supply, the power supply stability is improved, and the working time of equipment is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of on-line monitoring of pipeline compensators, and in particular relates to an on-line monitoring system for a pressure balance type compensator of a high-pressure heat supply pipeline. Background Art

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

[0003] In recent years, with the construction of long-distance heat supply projects, the distance between thermal power plants and urban areas has become farther and farther. When using long-distance pipelines for centralized heat supply to cities, there may be high mountain and canyon terrains with large elevation differences. In order to ensure the pipeline safety as much as possible, overhead or in-tunnel overhead laying is adopted. In order to compensate for the thermal expansion and contraction displacement of the pipeline and reduce the load of the main fixed support of the pipeline, the compensator must adopt a straight pipe balance structure type. This compensator consists of two groups of working bellows and one group of balance bellows. The number of bellows groups is large and the structure is complex. Moreover, the compensator is usually installed in remote field areas, making inspection inconvenient, the working state difficult to check, and difficult to detect after leakage, which poses a hidden danger to the safe operation of the main pipe network. In addition, a part of the existing monitoring equipment is powered by prefabricated power supplies and requires regular power supply replacement; another part is powered by solar energy, but due to the complex field environment, the solar panels will be damaged or covered with dust, resulting in affected power supply; and the maintenance of the above two power supply methods is difficult and the maintenance cost is high.

[0004] Therefore, it is necessary for us to design an on-line monitoring system for a pressure balance type compensator of a high-pressure heat supply pipeline to solve these problems. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide an on-line monitoring system for a pressure balance type compensator of a high-pressure heat supply pipeline.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: An on-line monitoring system for a pressure balance type compensator of a high-pressure heating pipeline. The pressure balance type compensator includes a balance bellows, balance wave ring plates are respectively arranged at both ends of the balance bellows, a balance wave outer tube is sleeved outside the balance bellows, the balance wave ring plates are located inside the balance wave outer tube and are all in sliding fit with the inner wall of the balance wave outer tube, working bellows are respectively arranged on the two balance wave ring plates, a connecting pipe is inserted into the free end of the working bellows, and the free end of the working bellows is fixedly connected to the outer wall of the connecting pipe. A working wave outer tube is also sleeved outside the working bellows and the connecting pipe, and the working wave outer tube is connected to the balance wave outer tube; The on-line 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 balance wave humidity sensor and a working wave humidity sensor. The balance wave humidity sensor is arranged on the balance 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 pipe and is respectively connected to the working wave outer tube and the connecting pipe; The control device includes a thermoelectric power generation device, a control unit and an energy storage device. The thermoelectric power generation device is arranged on the connecting pipe near the free end of the working wave outer tube, and the high-temperature surface is connected to the connecting pipe, and a heat sink is attached to the low-temperature surface.

[0007] Preferably, a protection mechanism is also arranged on the balance bellows. The protection mechanism includes a protection sleeve and a driving device. The protection sleeve is slidably sleeved outside the free end of the working wave outer tube, and a rack is embedded on the inner wall of the protection sleeve. The driving device is located between the connecting pipe and the working wave outer tube. The driving device includes a mounting frame and a dial block. The mounting frame is fixedly arranged on the inner wall of the working wave outer tube. A transmission gear and a sector gear are rotatably arranged on the mounting frame. The transmission gear is respectively meshed with the sector gear and the rack. A dial rod and a return spring are also arranged on the sector gear. One end of the return spring is connected to the outer wall of the connecting pipe. The dial block is arranged on the connecting pipe and is located on one side of the dial rod.

[0008] Preferably, a monitoring ring plate is sleeved on the connecting pipe inside the working wave outer tube. The monitoring ring plate is fixedly connected to the outer wall of the connecting pipe, and the monitoring ring plate is located between the working bellows and the mounting frame. A working wave sealing ring is arranged between the monitoring ring plate and the working wave outer tube.

[0009] Preferably, a balance wave outer tube is sleeved outside the balance bellows. The balance wave outer tube is connected to one of the balance wave ring plates, and the other balance wave ring plate is located inside the balance wave outer tube, and a balance wave sealing ring is provided between the balance wave outer tube and the inner wall thereof.

[0010] Preferably, the balance wave humidity sensor is fixedly arranged on the balance wave outer tube between the two balance wave ring plates, the working wave humidity sensor is fixedly arranged on the working wave outer tube between the monitoring ring plate and the balance wave ring plate, 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.

[0011] Preferably, mating insertion grooves are provided at the opposite ends of the two connecting pipes, and the two connecting pipes are inserted into each other through the insertion grooves at the ends.

[0012] Preferably, a connecting groove is formed through the working wave outer tube, and the transmission gear extends out of the connecting groove and meshes with the rack.

[0013] 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.

[0014] The advantages and positive effects of the present invention are as follows: 1. By providing an outer tube, a ring plate, a sealing packing and a humidity sensor, the present invention can achieve double combined sealing of the bellows and the packing, and can simultaneously realize on-line monitoring and early warning of minor leakage of the working bellows and the balance bellows by using the humidity sensor. The sealing packing can also prevent the heat supply main pipeline from losing pressure and shutting down in the case of a large amount of leakage of the working bellows and the balance bellows, thereby ensuring the normal operation of the heat supply system.

[0015] 2. By arranging a displacement sensor between the working wave ring plate and the end of the working wave outer tube, the present invention realizes on-line real-time monitoring of the overall displacement of the compensator, judges whether the compensator plays a normal compensation function, and provides a basis and support for judging the overall safety state of the pipeline.

[0016] 3. By arranging a thermoelectric power generation device, the present invention can generate electricity by using the temperature difference between the heat source in the pipeline and the external environment during the operation of the heat supply pipeline, supplement energy to the energy storage device, increase the power supply stability, and extend the working time of the equipment.

[0017] 4. By providing a driving device, the present invention amplifies the deformation generated during the thermal expansion and contraction of the heat dissipation pipe to drive the movement of the protective sleeve. When the pipe is operating, the protective sleeve can be retracted to expose the radiator, improving the heat dissipation effect of the internal components. When the pipe is not operating, the internal components are protected by the protective sleeve, extending the service life of the internal components and reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a schematic diagram of the overall external structure of the present invention; Figure 2 is a schematic plan view of the internal structure of the present invention; Figure 3 is Figure 2 a schematic enlarged view of the structure at A in Figure 4 is a schematic diagram of the connection structure of the sector gear, transmission gear and rack of the present invention; Figure 5 is a schematic three-dimensional model diagram of the internal structure of the present invention.

[0020] The description of the reference numerals is as follows: 1. Connecting pipe; 2. Working bellows; 3. Balance bellows; 4. Balance wave ring plate; 5. Heat sink; 6. Working wave outer tube; 7. Displacement sensor; 8. Working wave sealing ring; 9. Working wave humidity sensor; 10. Balance wave outer tube; 11. Balance wave humidity sensor; 12. Balance wave 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 frame; 22. Heat conducting ring plate; 23. Transmission gear; 24. Insertion slot; 25. Protective sleeve; 26. Sector gear; 27. Poking rod; 28. Poking block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 thus should not be construed as a limitation to 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 specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0023] The present invention will be further described below with reference to the accompanying drawings: Embodiment: As Figures 1 - 5 shown, an on-line monitoring system for a pressure balance type compensator of a high-pressure heat supply pipeline. The pressure balance type compensator includes a balance bellows 3. Balance wave ring plates 4 are respectively arranged at both ends of the balance bellows 3. A balance wave outer tube 10 is sleeved outside the balance bellows 3. The balance wave ring plates 4 are located inside the balance wave outer tube 10 and are all in sliding fit with the inner wall of the balance wave outer tube 10. Working bellows 2 are respectively arranged on the two balance 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 also sleeved outside the working bellows 2 and the connecting pipe 1. The working wave outer tube 6 is connected to the balance wave outer tube 10; The on-line 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 balance wave humidity sensor 11, and a working wave humidity sensor 9. The balance wave humidity sensor 11 is arranged on the balance wave outer tube 10. 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 pipe 1 and is respectively connected to the working wave outer tube 6 and the connecting pipe 1; 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 pipe 6. The thermoelectric power generation device 17 can adopt a semiconductor refrigeration sheet. A heat conduction ring plate 22 is arranged on the high-temperature surface of the thermoelectric power generation device 17. The heat conduction ring plate 22 is fixedly connected to the connecting pipe 1, and the high-temperature surface of the thermoelectric power generation device 17 is closely attached to the heat conduction 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 conduction ring plate 22 connected to the connecting pipe 1 will also increase, realizing the heating and temperature increase of 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, increasing the temperature difference between the two sides of the thermoelectric power generation device 17 and improving the power generation performance.

[0024] A protection mechanism is also arranged on the balance bellows 3. The protection mechanism 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 wave outer pipe 6, and a rack 16 is embedded on the inner wall of the protection sleeve 25. The driving device is located between the connecting pipe 1 and the working wave outer pipe 6. The driving device includes a mounting frame 21 and a dial block 28. The mounting frame 21 is fixedly arranged on the inner wall of the working wave outer pipe 6. A transmission gear 23 and a sector gear 26 are rotatably arranged on the mounting frame 21. The transmission gear 23 is respectively meshed with the sector gear 26 and the rack 16. Among them, limit blocks 13 are arranged at both ends of the teeth on the sector gear 26 to prevent the sector gear 26 from disengaging from the transmission gear 23. A dial rod 27 and a return spring 15 are also arranged on the sector gear 26. One end of the return spring 15 is connected to the outer wall of the connecting pipe 1. The dial block 28 is arranged on the connecting pipe 1 and is located on one side of the dial rod 27.

[0025] A monitoring ring plate 20 is sleeved on the connecting pipe 1 inside the working wave outer pipe 6. The monitoring ring plate 20 is fixedly connected to the outer wall of the connecting pipe 1, and the monitoring ring plate 20 is located between the working bellows 2 and the mounting frame 21. A working wave sealing ring 8 is arranged between the monitoring ring plate 20 and the working wave outer pipe 6.

[0026] A balance wave outer pipe 10 is sleeved outside the balance bellows 3. The balance wave outer pipe 10 is connected to one of the balance wave ring plates 4. The other balance wave ring plate 4 is located inside the balance wave outer pipe 10, and a balance wave sealing ring 12 is arranged between the balance wave ring plate 4 and the inner wall of the balance wave outer pipe 10.

[0027] A balance wave humidity sensor 11 is fixedly arranged on the balance wave outer pipe 10 between the two balance wave ring plates 4. A working wave humidity sensor 9 is fixedly arranged on the working wave outer pipe 6 between the monitoring ring plate 20 and the balance wave ring plate 4. 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.

[0028] The opposite ends of the two connecting pipes 1 are provided with matching insertion slots 24, and the two connecting pipes 1 are inserted into each other through the insertion slots 24 at the ends.

[0029] A connection slot 14 is penetrated through the working wave outer tube 6, and the transmission gear 23 extends out of the connection slot 14 and meshes with the rack 16.

[0030] 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 inside 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.

[0031] The working process of this embodiment: When in use, the pressure balance type compensator is installed at the joint of two heat pipelines through the connecting pipe 1.

[0032] When the heat pipeline does not convey the medium, the temperature of the heat 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 electric energy is generated, so the monitoring device does not work. At the same time, the heat pipeline will be in a shortened state, and the pressure balance type compensator installed at the joint of the two heat pipelines will compensate for the displacement of the heat pipeline.

[0033] At this time, according to the principle of thermal expansion and contraction, it can be known that the connecting pipe 1 will shorten, and the ends of the two connecting pipes 1 will approach each other. The approaching connecting pipes 1 will squeeze the balance bellows 3 through the balance wave ring plate 4, and at the same time will stretch the working bellows 2. During this process, the working wave outer tube 6 does not move relative to the connecting pipe 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 pipe 1 through the rack 16 to shield and protect the heat sink 5.

[0034] Take Figure 3 as an example for illustration. After the working bellows 2 extends, the connecting pipe 1 will move to the left. Since the working wave outer tube 6 does not move relative to the connecting pipe 1, the dial block 28 will move to the left, and the dial rod 27 will not be blocked by the dial block 28 anymore. 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 drive the protective sleeve 25 to move to the left through the rack 16 to sleeve the heat sink 5 inside the protective sleeve 25 for protection.

[0035] When the thermal pipeline transmits the medium, the heat inside the pipeline will be greater than the external environmental heat. At this time, according to the principle of thermal expansion and contraction, it can be known that 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. In 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 fan gear 26 to rotate through the shift rod 27, and when the fan 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, and can better exchange heat with the surrounding environment to improve the heat dissipation effect.

[0036] 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 temperature difference power generation device 17 will become larger, so current will be generated inside the temperature difference power generation device 17, and the current will flow into the control unit 18, wherein the energy storage device 19 is a battery, and 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 use time, the working wave humidity sensor 9, the balanced wave humidity sensor 11 and the displacement sensor 7 all use low-power sensors.

[0037] When there is a slight leakage 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 wave humidity sensor 9 or the balancing wave humidity sensor 11. The working wave humidity sensor 9 or the balancing wave humidity sensor 11 will send a signal to the control unit 18, and the control unit 18 will send a leakage warning signal to the staff after receiving the signal. When there is a large amount of leakage in the working bellows 2 or the balancing bellows 3, the working wave sealing ring 8 and the balancing wave sealing ring 12 on the outside of the monitoring ring plate 20 can prevent a large amount of leakage and prevent the main heating pipeline from losing pressure and shutting down, thereby ensuring the normal operation of the heating system and gaining buffer time for maintenance.

[0038] This compensator is composed of two groups of working bellows 2 and one group of balance bellows 3, and is used to compensate the axial telescopic displacement of the pipeline. Its internal connection structure determines that the displacement amounts of the two groups of working bellows 2 are the same and equal to the displacement amount of the balance bellows 3. Therefore, in order to online and real-time detect the actual displacement amount of the compensator, a displacement sensor 7 is arranged outside one of the groups of working bellows 2, and the online and real-time monitoring of the overall displacement amount of the compensator can be realized. One end of this displacement sensor 7 is fixed to the monitoring ring plate 20, and the other end is connected to the working wave mounting bracket 21. The actual compensation amount of the compensator is judged by measuring the distance between the monitoring ring plate 20 and the mounting bracket 21.

[0039] The above has described in detail an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the implementation scope of the present invention. All equal changes and improvements made according to the application scope of the present invention should still fall within the patent coverage scope of the present invention.

Claims

1. An on-line monitoring system for a pressure balance type compensator of a high-pressure heat supply pipeline, characterized in that: The pressure balance type compensator includes a balance bellows (3). Balance wave ring plates (4) are respectively arranged at two ends of the balance bellows (3). A balance wave outer tube (10) is sleeved outside the balance bellows (3). The balance wave ring plates (4) are located inside the balance wave outer tube (10) and are all in sliding fit with the inner wall of the balance wave outer tube (10). Working bellows (2) are respectively arranged on the two balance 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 also sleeved outside the working bellows (2) and the connecting pipe (1). The working wave outer tube (6) is connected to the balance wave outer tube (10). 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 balance wave humidity sensor (11), and a working wave humidity sensor (9). The balance wave humidity sensor (11) is arranged on the balance wave outer tube (10). 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 pipe (1) and is respectively connected to the working wave outer tube (6) and the connecting pipe (1). 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), and the high-temperature surface is connected to the connecting pipe (1), and a heat sink (5) is attached to the low-temperature surface.

2. The on-line monitoring system for a pressure balance type compensator of a high-pressure heating pipeline according to claim 1, characterized in that: A protection mechanism is also arranged on the balance bellows (3). The protection mechanism includes a protection sleeve (25) and a driving device. The protection sleeve (25) is slidably sleeved outside the free end of the working wave 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 pipe (1) and the working wave outer tube (6). The driving device includes a mounting frame (21) and a dial block (28). The mounting frame (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 frame (21). The transmission gear (23) is respectively meshed with the sector gear (26) and the rack (16). A dial rod (27) and a return spring (15) are also arranged on the sector gear (26). One end of the return spring (15) is connected to the outer wall of the connecting pipe (1). The dial block (28) is arranged on the connecting pipe (1) and is located on one side of the dial rod (27).

3. The on-line monitoring system for the pressure balance type compensator of high-pressure heating pipelines according to claim 2, characterized in that: A monitoring ring plate (20) is sleeved on the connecting pipe (1) located inside the working wave outer pipe (6). The monitoring ring plate (20) is fixedly connected to the outer wall of the connecting pipe (1), and the monitoring ring plate (20) is located between the working bellows (2) and the mounting bracket (21). A working wave sealing ring (8) is arranged between the monitoring ring plate (20) and the working wave outer pipe (6).

4. The on-line monitoring system for the pressure balance type compensator of high-pressure heating pipelines according to claim 1, characterized in that: A balance wave outer pipe (10) is sleeved outside the balance bellows (3). The balance wave outer pipe (10) is connected to one of the balance wave ring plates (4). The other balance wave ring plate (4) is located inside the balance wave outer pipe (10), and a balance wave sealing ring (12) is arranged between the balance wave ring plate (4) and the inner wall of the balance wave outer pipe (10).

5. The online monitoring system for the pressure balance type compensator of high-pressure heating pipelines according to claim 3, wherein: The balance wave humidity sensor (11) is fixedly arranged on the balance wave outer pipe (10) between the two balance wave ring plates (4). The working wave humidity sensor (9) is fixedly arranged on the working wave outer pipe (6) between the monitoring ring plate (20) and the balance wave ring plate (4). The displacement sensor (7) is located between the monitoring ring plate (20) and the mounting bracket (21), and is fixedly connected to the monitoring ring plate (20) and the mounting bracket (21).

6. The online monitoring system for a pressure balance type compensator of a high-pressure heating pipeline according to claim 1, characterized in that: The opposite ends of the two connecting pipes (1) are provided with matching insertion slots (24), and the two connecting pipes (1) are inserted into each other through the insertion slots (24) at the ends.

7. The on-line monitoring system for a pressure balance type compensator of a high-pressure heat supply pipeline according to claim 2, characterized in that: A connection slot (14) is penetrated and opened on the working wave outer pipe (6), and the transmission gear (23) meshes with the rack (16) after extending out of the connection slot (14).

8. An online monitoring system for a pressure balance type compensator of a high-pressure heat supply pipeline according to claim 1, characterized in that: 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 inside the heat sink (5), and the control unit (18) is connected to the heat sink (5).

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