Plugging device and plugging equipment

Abstract

The invention belongs to the technical field of fuel gas pipeline plugging, and more specifically relates to a plugging device and plugging equipment. The plugging device comprises a supporting cylinder, a sliding block screw rod and a sliding block are arranged in the supporting cylinder, the lower end of the sliding block can penetrate out of the supporting cylinder, the penetrating part is provided with a straight plane and a slope, the lower end of the supporting cylinder is connected with a plugging head through a pin shaft, and a rear cone plate sliding block, a rear cone plate, a rubberring, a front cone plate and a guide plate are arranged in the plugging head. According to the plugging device, the sliding block screw rod is driven so that the front cone plate and the rear cone plate can be used to extrude the rubber ring so as to complete plugging; and meanwhile, the plugging device can realize 90-degree steering in a pipeline through the guide plate. The invention further provides plugging equipment comprising the plugging device. The plugging equipment further comprises an inner rod used for driving the sliding block screw rod to rotate and a double-outlet-rod oil cylinder for driving the plugging head to move up and down and steer. The plugging equipment is long in service life, good in plugging effect and better in pipeline integrity keeping.

Description

technical field [0001] The invention belongs to the technical field of gas pipeline plugging, and more specifically relates to a plugging device and a plugging device including the plugging device. Background technique [0002] The plugging equipment is suitable for the opening and sealing construction of oil, petrochemical pipelines, urban gas transmission and distribution pipelines, and water pipelines. Traditional operation methods such as stopping the transmission, lowering the pressure, venting, and using open flames can avoid operating risks, improve safety, and make maintenance fast, economical and reliable. Plugging pipelines under pressure is the main method of pipeline construction at home and abroad. Existing construction technology and construction equipment mostly use sealing equipment and technologies such as expansion barrel sealing, plug sealing and folding sealing. However, the existing construction equipment and technology have many defects such as heavy ...

AI Technical Summary

Problems solved by technology

The following problems exist in the expansion cylinder type plugging device under pressure: 1. The expansion cylinder type plugging adopts the sealing method of cutting off the whole pipe, which destroys the integrity of the existing pipe network and reduces the strength of the pipeline

2. The expansion cylinder plugging has high requirements on the working environment. The existing four-way pipe fittings for plugging are large in size, and the space requirements for the operation pit are relatively high during welding and operation.

3. The plugging effect of the expansion cylinder plugging is poor. The existing sealing method only relies on the contact between the cut surface of the gas-carrying pipeline and the rubber of the expansion cylinder to achieve sealing. Higher factors are required

4. Affected by the pressure difference of the air flow, the sealing rubber is easily damaged during the process of the expansion cylinder being in place, resulting in the failure of the sealing

There are also problems in the triple-ply hot plugging: 1. Since the diameter of the plugging head of the triple-ply plugging is fixed after deployment, the threaded weld seam of the pipeline and the ellipticity of the pipeline have an impact on the plugging effect. A large amount of pipe plugging effect is poor

2. The triple-ply plugging is affected by the structure of the plugging equipment, the plugging head is relatively thin, and the pressure bearing capacity is low

Problems of plug-type plugging: 1. Plug-type plugging needs to open a hole equal to the inner diameter of the pipeline, which damages the strength of the pipeline, and is affected by the ellipticity of the pipeline. Blocking success rate

2. Since the plug-type plugging is equal-diameter or slightly larger-diameter plugging rubber, it is hard to plug into the pipeline for sealing, so the rubber cup for plug-type plugging is not suitable for repeated use, which increases the cost of the rubber cup. Also increased the cost of repairing and replacing the rubber cup

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