Water plugging device for petroleum pipeline maintenance

Abstract

The invention discloses a water plugging device for petroleum pipeline maintenance. The water plugging device comprises a gasbag body and an exhaust pipe which is arranged at the end of the gasbag body. A plurality of grooves are formed in the outer circumferential wall of the middle of the gasbag body. Two elastic metal sheets are arranged in each groove in a spaced mode, and the bent part in each elastic metal sheet is fixedly provided with a reinforcing pad. When the gasbag body is inflated, the two elastic metal sheets in each groove deform to expand outwards in the radial direction of the gasbag body. Pressure in a gasbag is gradually increased, elastic deformation is made to occur to the elastic metal sheets, and the elastic metal sheets expand outwards in the radial direction of the gasbag body until the elastic metal sheets make contact with the inner wall of a pipeline. In the outward expansion process, elastic force generated by the deformation of the elastic metal sheets directly acts on scale on the inner wall of the pipeline and crushes the scale; the reinforcing pads fixed on the elastic metal sheets can weaken the impact strength between the scale and the elastic metal sheets, and the problem of stress concentration of the elastic metal sheets is solved.

Description

technical field [0001] The invention relates to the field of pipeline construction, in particular to a water stopper for oil pipeline maintenance. Background technique [0002] During the maintenance or replacement of drainage pipes in oil warehouses and refineries, the sewage in the pipes often makes the construction impossible. In order to make the construction work normally, it is often necessary to block the water flow. The traditional method is to repair the brick wall Another common way to block the water flow is to throw sandbags in to block the water flow. Although these two methods can block the water flow, in many cases, workers work in pipelines with water, which is very inconvenient for construction. When dismantling is not clean, the residual garbage will cause secondary pollution to the water body, and it is easy to block the pipeline when the amount is large. [0003] In order to solve the above problems, airbags for pipeline water blocking have appeared in t...

AI Technical Summary

Problems solved by technology

[0002] During the maintenance or replacement of drainage pipes in oil warehouses and refineries, the sewage in the pipes often makes the construction impossible. In order to make the construction work normally, it is often necessary to block the water flow. The traditional method is to repair the brick wall Another common way to block the water flow is to throw sandbags in to block the water flow. Although these two methods can block the water flow, in many cases, workers work in pipelines with water, which is very inconvenient for construction. If the demolition is not clean, the residual garbage will cause secondary pollution to the water body, and it is easy to block the pipeline when the amount is large.

[0003] In order to solve the above problems, airbags for pipeline water blocking have appeared in the prior art, but ordinary water blocking airbags lack the pressure control device after inflation and overpressure in the process of inflation and water blocking, so that the airbags are easy to explode due to overpressure. It affects repeated use and increases the cost of use. In addition, the investigation of the material of the airbag body is not enough. In most cases, a single-layer elastic airbag body material is used, which cannot take into account the various requirements of the elasticity, rigidity, and friction of the airbag; and in the tube Scaling often occurs, that is, protruding scales of different sizes are produced. When the airbag is pressurized, the outer wall of the airbag body inflates and contacts with the protruding scales, and the outer wall of the airbag is easily scratched or damaged. resulting in water blocking failure

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