Water plugging device for petroleum pipeline maintenance

[0022] Example 1

[0023] like figure 1 and figure 2 As shown, this embodiment includes an airbag body 1 and an exhaust pipe 4 opened at the end of the airbag body 1 . A plurality of grooves 2 are opened on the outer circumferential wall of the middle part of the airbag body 1 , and in the grooves 2 Two elastic metal sheets 9 are arranged at intervals, and a reinforcing pad 8 is fixed on the inner curved portion of the elastic metal sheet 9 . When the airbag body 1 is inflated, the two elastic metal sheets 9 deform along the airbag body 1 . radial outward expansion.

[0024] When the drainage pipe is blocked, the present invention makes the following improvements for the protruding dirt on the inner wall of the pipe, and replaces the existing cylindrical outer wall with an airbag body 1 with a plurality of annular grooves 2 in the middle. , so that the dirt on the inner wall of the pipeline has a certain placement space when it is in contact with the airbag body 1, so as to prevent the dirt from directly squeezing with the outer wall of the airbag and causing damage; further, two elastic metals are arranged in the groove 2 at intervals. After the air enters the airbag body 1 from the exhaust pipe 4, the internal pressure of the airbag gradually increases, so that the elastic metal sheet 9 elastically deforms and expands outward along the radial direction of the airbag body 1 until it reaches the inner wall of the pipe. Contact, in the process of outward expansion, the elastic force generated by the deformation of the elastic metal sheet 9 directly acts on the dirt on the inner wall of the pipe and breaks it, and the reinforcing pad 8 fixed on the elastic metal sheet 9 can The impact force between the dirt and the elastic metal sheet 9 is weakened, which reduces the stress concentration of the elastic metal sheet 9. At the same time, relative to the outer wall of the airbag body 1, the thickness of the part of the outer wall with the groove 2 is smaller than that without the groove. The thickness of the other part of the outer wall of the groove 2, during the inflation process, the outer wall of the airbag body 1 is in close contact with the inner wall of the pipeline, and the elastic metal sheet 9 quantitatively removes the dirt, which ensures the sealing performance of the pipeline and reduces the The damage to the airbag caused by the dirt on the inner wall of the pipeline finally achieves the purpose of quickly sealing the sewage in the pipeline and ensuring its good sealing effect.

[0025] Preferably, the arc-shaped elastic metal sheet 9 will undergo a two-stage deformation process when it is subjected to the air pressure inside the airbag body 1. First, the elastic metal sheet 9 as a whole changes from being recessed inward to being placed horizontally. At this time, the reinforcing pad 8 is not It is in contact with the inner wall of the pipeline, and begins to contact with the dirt on the inner wall of the pipe, and at the same time buffers the collision between the elastic metal sheet 9 and the dirt, so as to ensure the service life of the elastic metal sheet 9. The placement changes to protrude outward along the radial direction of the airbag body 1, that is, the elastic metal sheet 9 crushes the dirt to the greatest extent, and the outer wall of the airbag body 1 is closely fitted with the inner wall of the pipeline to seal off the pipeline and prevent the internal wall of the pipeline. Sewage leakage, convenient for pipeline maintenance.

[0026] Preferably, the rectangular elastic metal sheet 9 changes from being placed horizontally to protruding outward along the radial direction of the airbag body 1 as the air pressure inside the airbag body 1 increases. The outer wall of 1 is closely attached to the inner wall of the pipeline to realize the isolation of the pipeline, prevent the leakage of sewage in the pipeline, and facilitate the maintenance of the pipeline.

[0027]Further, when the two elastic metal sheets 9 are deformed at the same time, the outer wall part of the airbag body 1 between the two will be relatively squeezed, thereby delaying or affecting the deformation of the elastic metal sheets 9. A shrinking groove 6 is provided between the sheets 9, which can reserve space for the expansion of the end of the elastic metal sheet 9, so as to prevent the outer wall of the airbag body 1 from being excessively squeezed and causing cracks.

[0028] In addition, protrusions 3 are formed between two adjacent grooves 2, and transition arc surfaces 5 are provided at both ends of the protrusions 3, and a plurality of fixing rings 7 are provided on the airbag body 1. The fixing rings 7 are located at both ends of the elastic metal sheet 9 . The set excessive arc surface can ensure that the protrusions 3 move smoothly when they are in contact with the inner wall of the pipeline and are squeezed when the volume of the airbag body 1 continues to expand, thereby discharging the impact of the protruding dirt on the inner wall of the pipeline on the sealing of the outer wall of the airbag body 1. Improve the sealing effect of the airbag; in order to avoid excessive stretching of the outer wall of the airbag body 1 when the elastic metal sheet 9 is deformed, the present invention is provided with a fixing ring 7 in the airbag body 1, and the fixing ring 7 acts as a reinforcing rib for the airbag The function of the airbag makes the airbag body 1 more stable and improves the service life of the airbag.