Dual-packing cup suspension plugging head

Abstract

The invention discloses a dual-packing cup suspension plugging head comprising a guide push plate and a support frame, wherein the support frame is articulated with the guide push plate; the end part of the support frame is fixedly connected with a plugging packing cup; the plugging packing cup is composed of a main packing cup and an auxiliary packing cup which are arranged in a same direction; a main support plate arranged at the bottom of the main packing cup and a connection plate arranged at the inner side of the auxiliary packing cup are connected into an integer through a hinged shaft; an auxiliary support plate is fixedly connected to the bottom of the auxiliary packing cup; a guide shaft fixedly connected with the auxiliary support plate on one end is arranged in an upwards aslope extending way, and the end part of the guide shaft is provided with a guide wheel. The invention has the advantages of simple structure, flexible operation and good plugging effect; in the invention, the main packing cup and the auxiliary packing cup are used in a matching way especially when an oil-gas pipeline is plugged so that the purpose of one-time dual plugging is realized in such a way that the main packing cup directly faces to an impact medium and the tiny leakage of edge gaps is plugged once more by using the e auxiliary packing cup, a great quantity of manpower and material resources are saved, the safety is greatly enhanced, and the engineering time is shorted.

Description

technical field [0001] The invention relates to a pipe sealing piece, in particular to a double-skinned cup rotary plugging head with double sealing at one time, tight blocking and no leakage. Background technique [0002] Pipelines (including water pipelines, gas pipelines, oil pipelines, etc.) often need to be temporarily blocked during construction, maintenance or inspection, that is, when the pipeline is completely sealed, physical and mechanical means are used to Isolate and block the modified section from the pipeline, and perform maintenance, repair or replacement on it. Physical and mechanical means include barrel-type sealing, suspension-type sealing and other forms. The rerouting of pipelines in operation can be divided into two ways: stopping and rerouting and rerouting without discontinuation: rerouting without discontinuing usually connects the two sides of the rerouting section with bypass pipes to transport the medium through the bypass pipeline, and then blo...

AI Technical Summary

Problems solved by technology

When the pipeline to be sealed is a seamless pipe and the medium pressure is not high, the sealing effect is still acceptable. If the pipeline (especially the oil and gas pipeline) is a spiral pipe or there is a welded joint on the pipeline, when the sealing cup enters the pipeline to seal , the welding joint often has medium leakage due to poor sealing. When the pressure of the medium in the pipe is high, the leakage will be aggravated, and the next step of joint work cannot be carried out. Once the oil and gas pipeline is not tightly sealed, leakage will occur , there may be a danger of explosion

The usual solution is to open a lower capsule hole between the plug and the connector for secondary plugging. This solution requires a lot of manpower and material resources, and prolongs the construction period.

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