Double-sealed underground bellows compensator

Abstract

A double-sealed underground corrugated pipe compensator is used to compensate for the thermal expansion and contraction of underground pipelines. It includes a working corrugated pipe (3), a first connecting pipe (1) sealed and welded to the left end of the working corrugated pipe, a second connecting pipe (9) sealed and welded to the right end of the working corrugated pipe, a spare corrugated pipe (6) fitted on the second connecting pipe, and the left end of the spare corrugated pipe sealed and welded to the second connecting pipe; the spare corrugated pipe and the working corrugated pipe are located in an outer cylinder (4), the right end of the spare corrugated pipe is sealed and welded to the outer cylinder, and the left end of the outer cylinder is sealed and welded to the first connecting pipe through a first ring plate (2). Its beneficial effects are: 1. Under normal circumstances, the working corrugated pipe plays a sealing role. When the sealing performance of the working corrugated pipe fails, the spare corrugated pipe plays a sealing role, which can avoid the situation of forcibly stopping the pipeline operation and ensure the normal operation of the pipeline; 2. It can reduce the workload of inspection; 3. Due to the presence of the outer pipe, it can prevent foreign objects from damaging the corrugated pipe.

Description

Technical Field

[0001] This utility model relates to a corrugated pipe compensator used to compensate for the thermal expansion and contraction of underground pipelines. Background Technology

[0002] Corrugated pipe compensators on underground pipelines are difficult to inspect due to their underground installation. It is not easy to detect potential problems or determine appropriate maintenance dates in advance, which can easily lead to sudden accidents that force the pipeline to stop operating and potentially cause significant economic losses. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a double-sealed underground corrugated pipe compensator, which adopts a double-corrugated pipe sealing structure. When one corrugated pipe fails, the other corrugated pipe can be put into operation, avoiding the situation of forcibly stopping the pipeline operation.

[0004] The technical solution of this utility model is a double-sealed buried bellows compensator, which includes a working bellows 3, a first connecting pipe 1 sealed and welded to the left end of the working bellows, and a second connecting pipe 9 sealed and welded to the right end of the working bellows. The feature is that a spare bellows 6 is fitted on the second connecting pipe, and the left end of the spare bellows is sealed and welded to the second connecting pipe. The spare bellows and the working bellows are located in the outer cylinder 4. A second ring plate 8 is sealed and welded to the right end of the outer cylinder. The right end of the spare bellows is sealed and welded to the second ring plate. The second ring plate is fitted on the second connecting pipe. The left end of the outer cylinder is sealed and welded to the first connecting pipe through the first ring plate 2.

[0005] As an improvement, a conductivity sensor 10 for measuring the conductivity of the solution is sealed and inserted into the wall of the outer cylinder.

[0006] The beneficial effects of this utility model are: 1. Under normal circumstances, the working bellows plays a sealing role. When the sealing performance of the working bellows fails, the spare bellows plays a sealing role, which can ensure the normal operation of the pipeline; 2. When the sealing performance of the working bellows fails, fluid medium will enter the outer cylinder, and the conductivity value output by the conductivity sensor will increase. By detecting the conductivity value, it can be known that the working bellows has failed, and a suitable date can be arranged for maintenance of the compensator; 3. It can reduce the workload of inspection; 4. Due to the presence of the outer cylinder, it can prevent foreign objects from damaging the bellows. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model.

[0008] Reference numerals in the attached diagram: 1 - First connecting pipe, 2 - First ring plate, 3 - Working bellows, 4 - Outer cylinder, 5 - First gasket, 6 - Spare bellows, 7 - Second gasket, 8 - Second ring plate, 9 - Second connecting pipe, 10 - Conductivity sensor. Detailed Implementation

[0009] A double-sealed underground corrugated pipe compensator includes a working corrugated pipe 3, a first connecting pipe 1 sealed and welded to the left end of the working corrugated pipe, and a second connecting pipe 9 sealed and welded to the right end of the working corrugated pipe. The feature is that a spare corrugated pipe 6 is fitted on the second connecting pipe. The left end of the spare corrugated pipe can be directly sealed and welded to the second connecting pipe, or it can be sealed and welded to the second connecting pipe through a first gasket 5. That is, the first gasket is located between the spare corrugated pipe and the second connecting pipe. The first gasket is sealed and welded to the spare corrugated pipe and also sealed and welded to the second connecting pipe. The spare bellows and the working bellows are located in the outer cylinder 4. The right end of the outer cylinder is sealed and welded with a second ring plate 8. The second ring plate is fitted onto the second connecting pipe. The right end of the spare bellows can be directly sealed and welded to the second ring plate, or the left side of the second ring plate can be sealed and welded with a second gasket 7. The right end of the spare bellows is sealed and welded onto the second gasket. The left end of the outer cylinder is sealed with a first ring plate 2, which is sealed with the first connecting pipe.

[0010] The outer cylinder protects the working bellows and the spare bellows, preventing foreign objects from impacting or adhering to them.

[0011] As an improvement, a conductivity sensor 10 for measuring the conductivity of the solution is sealed and inserted into the wall of the outer cylinder.

[0012] In use, the first connector is sealed to one section of the pipe, and the second connector is sealed to the other section of the pipe.

[0013] The working principle of the double-sealed buried bellows compensator is that when the pipeline expands or contracts due to heat, the working bellows and the standby bellows expand or contract accordingly to compensate for the change in pipeline length. For example, when the pipeline expands due to heat, the first and second connecting pipes move towards each other, the working bellows is compressed, and the standby bellows is stretched.

[0014] Under normal circumstances, the working bellows serves a sealing function. However, because the fluid medium in the pipeline generates internal pressure within the working bellows, it is prone to fatigue. When the working bellows is in operation, no fluid medium pressure is applied to the standby bellows, so the sealing performance of the working bellows fails before that of the standby bellows. After the sealing performance of the working bellows fails, the fluid medium in the pipeline enters the outer cylinder. Since the right end of the standby bellows is sealed to the outer cylinder, the left end of the standby bellows is sealed to the second connecting pipe, and the left end of the outer cylinder is sealed to the first connecting pipe, the fluid medium cannot leak from the outer cylinder. The standby bellows then serves a sealing function, ensuring the normal operation of the pipeline.

[0015] When the working bellows fails to seal, fluid will enter the outer cylinder, and the conductivity sensor will output a conductivity value. By detecting the conductivity value, it can be determined that the working bellows has failed, and the compensator can be maintained at an appropriate time.

Claims

1. A double-sealed buried bellows compensator, comprising a working bellows (3), a first connecting pipe (1) sealed and welded to the left end of the working bellows, and a second connecting pipe (9) sealed and welded to the right end of the working bellows, characterized in that, The second pipe is fitted with a spare bellows (6), and the left end of the spare bellows is sealed and welded to the second pipe. The spare bellows and the working bellows are located in the outer cylinder (4). The right end of the outer cylinder is sealed and welded with a second ring plate (8). The right end of the spare bellows is sealed and welded to the second ring plate. The second ring plate is fitted on the second pipe. The left end of the outer cylinder is sealed and welded to the first pipe through the first ring plate (2).

2. The double-sealed buried bellows compensator according to claim 1, characterized in that, A conductivity sensor (10) for measuring the conductivity of the solution is sealed and inserted into the wall of the outer cylinder (4).

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