Cable-free type pipeline countercurrent crawl device

Abstract

The invention discloses a cable-free type pipeline countercurrent crawl device which comprises a crawl barrel, a driving mechanism, a front slip crawl mechanism and a rear slip stop mechanism, wherein the front slip crawl mechanism is in screw transmission fit with the driving mechanism, so that the front slip crawl mechanism can reciprocate along a crawl groove; the crawl device further comprises an unlocking mechanism which comprises a center rod, a front unlocking pull rope and a rear unlocking pull rope; and the front unlocking pull rope and the rear unlocking pull rope drive the front slip crawl mechanism and the rear slip stop mechanism to be folded radially through the backward motion of the center rod.. According to the cable-free type pipeline countercurrent crawl device, motion of a fluid in a pipe is directly used for acquiring power, the device can crawl in a pipeline in a direction against the fluid, and the unlocking mechanism is triggered under a specific condition, and the device can return back in the fluid direction, so that automatic changeover of countercurrent advancing and fair current returning is realized. The cable-free type pipeline countercurrent crawl device is applicable to cleaning, inspection, surveying and mapping operation of a pipeline which is smaller in inner diameter, longer in operation distance and complex in work environment.

Description

technical field [0001] The invention relates to a crawler, in particular to a cableless pipeline countercurrent crawler. The crawler can realize the functions of going upstream and returning downstream, and is suitable for special projects such as small inner diameters, long distances, and complex working environments. Real-time detection and maintenance of pipelines. Background technique [0002] In the oil and gas industry, pipeline transportation is a convenient and efficient transportation method. The pipeline transportation medium generally has the characteristics of flammable, explosive, toxic, and corrosive; the pipeline transportation mode has the characteristics of long transportation distance, under pressure transportation, harsh pipeline transportation environment, and complicated pipeline construction. Therefore, during the operation of the pipeline, there will be hidden dangers such as the deposition of pollutants, the corrosion of harmful substances, the leaka...

AI Technical Summary

Problems solved by technology

Among them, there are two main disadvantages of the cable-connected external power supply: (1) The cable follows the pipeline robot all the time. If the pipeline is very long, the cable must be very long, and the cost is relatively expensive.

(2) Because of the cable, the reverse flow crawler cannot close the entrance channel after it is put into the pipeline, and realizing dynamic sealing has become one of the technical difficulties. However, the power of the self-contained battery is limited, so these two power sources limit the crawling of the pipeline long-distance operation

Since the crawling mechanism adopts a rigid support brush, although the rigid support brush moves forward smoothly against the current, it is difficult to move backward, and cannot automatically complete the conversion between forward and backward, which limits the scope of use and is critical for real-time detection and maintenance of pipelines The demands of the job are more difficult

Moreover, the crawling mechanism also has many deficiencies in terms of traction capacity, obstacle surmounting ability, and bend pipe passing ability.

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