A bellows expansion joint with leakage protection function

Abstract

A bellows expansion joint with a leakage protection function, comprising an expansion joint body and a leakage protection component. The leakage protection component is arranged on the outer side of the expansion joint body. The leakage protection component includes an end ring, a protective bellows component, a contact closing component, a leakage monitoring device, a control system and a power system. One end of the end ring is connected to the first end pipe, and the other end thereof is connected to one end of the protective bellows component. The other end of the protective bellows component is connected to one side of the contact closing component. The other side of the contact closing component is directly connected to the second end pipe, or is connected to the second end pipe through another group of protective bellows components. The monitoring point of the leakage monitoring device is arranged in the space enclosed by the leakage protection component. The leakage monitoring device is connected to the control system to achieve effective sealing of the protective bellows, and at the same time play the same compensation, vibration reduction and noise reduction roles as the working bellows.

Description

Technical Field

[0001] The present invention relates to the technical field of expansion joints, and specifically relates to a bellows expansion joint with a leakage protection function. Background Art

[0002] A bellows expansion joint is an important accessory commonly used in pipeline systems. Due to its flexibility, it can freely elongate, compress, and bend, and has a certain pressure-bearing capacity. Therefore, it is widely used in pipeline systems to compensate for deformations caused by thermal expansion and contraction of the pipeline system, foundation settlement, relative movement of equipment, and impact vibration, thereby reducing pipeline stress and playing a role in vibration reduction and noise reduction.

[0003] During the use of a bellows expansion joint, if leakage occurs due to damage to the bellows and it cannot be detected and the machine stopped for treatment in time, or it is inconvenient to stop the machine immediately for treatment, it will affect the safe operation of the pipeline system, the equipment near the expansion joint, and even the entire system. In severe cases, safety accidents may even occur. Especially in the case where the medium has toxic and harmful characteristics, once the medium leaks, it will bring catastrophic consequences. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a bellows expansion joint with a leakage protection function. After detecting that the inner working bellows leaks, the emergency sealing device is activated to achieve effective sealing of the protection bellows, and at the same time, it plays the same compensation, vibration reduction, and noise reduction roles as the working bellows.

[0005] To achieve the above technical purpose, the technical solution adopted is: a bellows expansion joint with a leakage protection function, including an expansion joint main body and a leakage protection component. The expansion joint main body includes a first end pipe, a second end pipe, and a working bellows assembly. The leakage protection component is arranged on the outer side of the expansion joint main body. The leakage protection component includes an end ring, a protection bellows assembly, a contact closing component, a leakage monitoring device, a control system, and a power system. One end of the end ring is connected to the first end pipe, and the other end is connected to one end of the protection bellows assembly. The other end of the protection bellows assembly is connected to one side of the contact closing component. The other side of the contact closing component is directly connected to the second end pipe, or is connected to the second end pipe through another group of protection bellows assemblies. The monitoring point of the leakage monitoring device is arranged in the space surrounded by the leakage protection component. The leakage monitoring device is connected to the control system. According to the monitoring signal of the leakage monitoring device, the control system powered by the electric system controls the opening or closing of the contact closing component.

[0006] The working bellows assembly is composed of a single working bellows or multiple working bellows connected in series by intermediate pipes.

[0007] The protection bellows assembly is composed of a single protection bellows or multiple protection bellows connected in series by intermediate pipes.

[0008] The contact closing assembly consists of two magnet ring plates arranged oppositely, and the magnet ring plates are magnetized or demagnetized under the control of a control system.

[0009] The contact closing assembly consists of two ring plates arranged oppositely and a fixture for clamping or releasing the two ring plates, and the fixture clamps or releases the two ring plates under the control of a control system.

[0010] Sealing rings are provided on the opposite surfaces of the two ring plates.

[0011] The beneficial effect of the present invention is that: a bellows expansion joint with a leakage protection function, while providing common displacement compensation, vibration reduction and noise reduction functions, adds a leakage protection emergency sealing function, improves the safety and reliability of the bellows expansion joint, and protects the safe operation of equipment. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0013] Figure 2 It is a schematic structural diagram of Embodiment 2 of the present invention;

[0014] In the figure: 1. First end pipe; 2. First end ring; 3. Leakage monitoring device; 4. Protection bellows; 5. Intermediate pipe; 6. Sealing ring; 7. Ring plate; 8. Second end pipe; 9. Working bellows; 10. Second end ring; 11. Control system; 12. Power system, 13. Fixture. Detailed Embodiments

[0015] A bellows expansion joint with a leakage protection function includes an expansion joint main body and a leakage protection assembly. The expansion joint main body includes a first end pipe 1, a second end pipe 8 and a working bellows assembly. When there is no leakage, the expansion joint main body is used to compensate for deformations caused by reasons such as thermal expansion and contraction of the pipeline system, foundation settlement, relative movement of equipment, and impact vibration, so as to reduce pipeline stress and play a role in vibration reduction and noise reduction.

[0016] The leakage protection component is arranged on the outer side of the expansion joint body. The leakage protection component includes an end ring, a protective bellows component, a contact closing component, a leakage monitoring device 3, a control system 11, and a power system 12. The contact closing component is in an open state when the expansion joint body is not compressed. When the expansion joint body is compressed, it will move and close along with the expansion joint body. One end of the end ring is connected to the first end pipe, and the other end is connected to one end of the protective bellows component. The other end of the protective bellows component is connected to one side of the contact closing component. The other side of the contact closing component is directly connected to the second end pipe, or is connected to the second end pipe through another set of protective bellows components. The monitoring point of the leakage monitoring device is arranged in the space enclosed by the leakage protection component, and is used to monitor whether the expansion joint body leaks. The leakage monitoring device is connected to the control system and sends a leakage monitoring signal to the control system in real time. According to the monitoring signal of the leakage monitoring device, when the monitoring signal is a leakage signal, the control system powered by the electric system controls the contact closing component to close. Otherwise, it controls the contact closing component to open.

[0017] The working bellows component is composed of a single working bellows or multiple working bellows connected in series by intermediate pipes.

[0018] The protective bellows component is composed of a single protective bellows or multiple protective bellows connected in series by intermediate pipes.

[0019] The contact closing component is composed of two magnet ring plates arranged oppositely. The control system controls the magnet ring plates to be magnetized or demagnetized. When magnetized, the two magnet ring plates attract each other, and the opposite surfaces of the two magnet ring plates fit together to achieve closing. When demagnetized, the two magnet ring plates naturally separate due to the gap between them when they are set.

[0020] The contact closing component is composed of two ring plates arranged oppositely and a clamp for clamping or relaxing the two ring plates. The control system controls the clamp to clamp the two ring plates or loosen the two ring plates. When the clamp is relaxed, the two ring plates naturally separate due to the gap between them when they are set.

[0021] Sealing rings are arranged on the opposite surfaces of the two ring plates to more closely achieve a closed state for the fitting ring plates.

[0022] Embodiment 1

[0023] As Figure 1As shown in the figure, a bellows expansion joint with leakage protection function includes an expansion joint body and a leakage protection component. The expansion joint body includes a first end pipe 1, a second end pipe 8, two working bellows, and an intermediate pipe 5. The first end pipe 1 is connected to the two working bellows 9 connected in series by the intermediate pipe and then connected to the second end pipe 8. The leakage protection component includes a first end ring 2, two protection bellows 4, two magnetic ring plates 7, a leakage monitoring device 3, a second end ring 10, a control system 11, and a power system 12. One end of the first end ring 2 is connected to the first end pipe 1, and the other end is connected to one end of the protection bellows 4. The other end of the protection bellows 4 is connected to a magnetic ring plate 7. The other magnetic ring plate 7 is connected to another protection bellows 4. The protection bellows 4 is connected to the second end pipe 8 through the second end ring 19. The monitoring point of the leakage monitoring device is arranged in the space surrounded by the leakage protection component. There is a gap between the two magnetic ring plates 7 when the expansion joint body is not compressed.

[0024] Figure 1 For the leakage monitoring device 3 in it, corresponding sensors are arranged according to the type of the flowing medium inside the working bellows 9, such as humidity sensors, temperature sensors, medium composition sensors, radiation sensors, etc. Whether the working bellows 9 leaks is judged by the change of the data fed back by the sensors. If it is monitored that the working bellows 9 has leaked, the control system 11 starts the emergency sealing switch to supply power to the magnetic ring plates, so that the two magnetic ring plates 7 are attracted tightly by magnetic force, and the sealing ring 6 plays a good sealing role, ensuring that the working medium no longer leaks out and ensuring the safety of the pipeline system and nearby equipment. At the same time, the protection bellows 4 replaces the working bellows 9 to continue to function, compensating for the deformation caused by reasons such as the thermal expansion and contraction of the pipeline system, the settlement of the foundation, the relative movement of equipment, and shock vibration, and playing a role in vibration reduction and noise reduction until the replacement condition is met.

[0025] Embodiment 2

[0026] As Figure 1 shown in the figure, a bellows expansion joint with leakage protection function includes an expansion joint body and a leakage protection component. The expansion joint body includes a first end pipe 1, a second end pipe 8, and a working bellows. The first end pipe 1 is connected to the working bellows 9 and then connected to the second end pipe 8. The leakage protection component includes a first end ring 2, two protection bellows 4, two ring plates 7, a leakage monitoring device 3, a control system 11, and a power system 12. One end of the first end ring 2 is connected to the first end pipe 1, and the other end is connected to one end of the protection bellows 4. The other end of the protection bellows 4 is connected to a ring plate 7. The ring plate is arranged opposite to the other ring plate 7, and the two are closed by being attached to each other. A sealing ring 6 is arranged on the attached surface of any one of the ring plates. The other ring plate 7 is connected to the second end pipe 8. The monitoring point of the leakage monitoring device is arranged in the space surrounded by the leakage protection component. There is a gap between the two ring plates 7 when the expansion joint body is not compressed.

[0027] Figure 2The leakage monitoring device in it arranges corresponding sensors according to the types of the flowing medium inside the working bellows 9, such as humidity sensors, temperature sensors, medium composition sensors, radiation sensors, etc. It judges whether the working bellows 9 leaks by the change of the data fed back by the sensors. If it is monitored that the working bellows 9 has leaked, the control system 11 starts the emergency sealing switch, and the electric or pneumatic clamp 13 clamps the two ring plates 7, and the sealing ring 6 plays a good sealing role to ensure that the working medium no longer leaks externally and ensure the safety of the pipeline system and nearby equipment. At the same time, the protection bellows 4 replaces the working bellows 9 to continue to function, compensates for the deformation caused by reasons such as the thermal expansion and contraction of the pipeline system, foundation settlement, relative movement of equipment, and shock vibration, and plays a role in reducing vibration and noise until the replacement condition is available.

Claims

1. A bellows expansion joint with leakage protection function, characterized in that: It includes an expansion joint body and a leakage protection component. The expansion joint body includes a first end pipe, a second end pipe, and a working bellows assembly. The leakage protection component is arranged on the outer side of the expansion joint body. The leakage protection component includes an end ring, a protective bellows assembly, a contact closing component, a leakage monitoring device, a control system, and a power system. One end of the end ring is connected to the first end pipe, and the other end is connected to one end of the protective bellows assembly. The other end of the protective bellows assembly is connected to one side of the contact closing component. The other side of the contact closing component is directly connected to the second end pipe or is connected to the second end pipe through another set of protective bellows assemblies. The monitoring point of the leakage monitoring device is arranged in the space enclosed by the leakage protection component. The leakage monitoring device is connected to the control system. According to the monitoring signal of the leakage monitoring device, the control system powered by the electric system controls the contact closing component to open or close; The contact closing component is composed of two magnet ring plates arranged oppositely, and the magnet ring plates are controlled by the control system to be magnetized or demagnetized; Alternatively, the contact closing component is composed of two ring plates arranged oppositely and a clamp for clamping or relaxing the two ring plates, and the control system controls the clamp to clamp the two ring plates or loosen the two ring plates.

2. The bellows expansion joint with leakage protection function according to claim 1, characterized in that: The working bellows assembly is composed of a single working bellows or multiple working bellows connected in series by an intermediate pipe.

3. The bellows expansion joint with leakage protection function according to claim 1, characterized in that: The protective bellows assembly is composed of a single protective bellows or multiple protective bellows connected in series by an intermediate pipe.

4. The bellows expansion joint with leakage protection function according to claim 1, characterized in that: Sealing rings are provided on the opposite surfaces of the two ring plates.

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