RU105705U1 - DEVICE FOR REMOVING MOISTURE FROM PIPELINE - Google Patents

Abstract

 1. A device for removing moisture from the pipeline, which is a drainage-vacuum unit containing a control sump, preferably equipped with horizontal and vertical connecting pipes, while using a preferably horizontal pipe, the sump is connected to the hole at the bottom of the pipe, and preferably a vertical connecting pipe through a ball valve in a typical carpet and a probe tube, the water collector is connected to a vacuum pump equipped with a measuring tank. ! 2. The device according to claim 1, characterized in that preferably the horizontal pipe is equipped with a fitting for connecting to the hole at the bottom point of the pipeline.

Description

The claimed utility model is designed to repair the pipeline, namely to remove moisture from the pipeline and restore the properties of polyurethane foam insulation of pipelines. The primary area of use of the claimed utility model is the drainage of polyurethane foam insulation (hereinafter PUF insulation) and the determination of the causes of its jamming in pipelines.

The normative and technical documentation for acceptance and operation of pipelines during PPU-isolation sealing requires the re-installation of the polyethylene connector of the outer shell, replacement of the polyethylene shell with a locking length of up to 3 meters, and replacement of pipes with a polyethylene shell with a length of more than 3 meters (hereinafter PI pipes) (10.5 m).

Given satisfactory insulation of pipes with a polyethylene sheath mounted in finished trenches (hereinafter referred to as PI pipes), the following are typical causes of a decrease in insulation resistance:

- flooding of PI pipes with unsealed couplings in trenches with water, melt water, water inflow from damaged utilities;

- poor-quality preparation of the base for stacked pipes, as a result of which there is a subsidence and rupture of the polyethylene sheath and polyethylene couplings;

- low technological discipline in the installation of couplings and pipelines with inadequate control by technical supervision.

Due to the high moisture absorption capacity of the PUF insulation, the length of the wetted areas can significantly expand, which, as a result of interaction with chloride ions included in the PUF insulation, will lead to active corrosion of the pipe metal and its damage (accident).

A device is known from the prior art (RU, A 2006137391, publication April 27, 2008) for repairing an insulation coating of a pipeline, comprising a site of a pipe contactless digging unit, equipment for removing damaged insulation coating, a tool for preparing the surface of the pipeline and applying a new insulation coating, and site of instillation of the repaired pipeline.

The use of the known device requires a significant amount of construction work both to open the network, and to improve the territory, interruptions in the heat supply to consumers.

Other known solutions for drainage of polyurethane foam insulation of pipelines have not been identified.

By virtue of the above arguments, the task to which the proposed utility model is aimed is to repair pipelines as soon as possible.

The problem is solved as follows.

The claimed device for removing moisture from the pipeline, which is a drainage-vacuum unit containing a control sump, preferably with a horizontal and vertical connecting pipes, while using a preferably horizontal pipe, the sump is connected to the hole at the bottom of the pipe, and through a preferably vertical connecting pipe through a ball valve in a typical carpet and a probe tube the water collector is connected to a vacuum pump equipped with a measuring tank.

In a preferred embodiment of the utility model, preferably the horizontal pipe is provided with a fitting for connection to an opening at a lower point of the pipeline.

At the same time, after determining the jamming area using the instrument method and taking into account the terrain, it is possible to apply the proposed device, which allows:

- carry out the drying of polyurethane foam insulation of pre-insulated pipelines of heat supply systems (especially, with the integrity of the polyethylene shell);

- if necessary, to shift the repair time for detected leaks in both the steel pipe (sweating of the welds during operation) and the protective polyethylene sheath to the inter-heating period, preventing moisture from spreading through the polyurethane foam insulation.

A general view of a utility model, in a preferred embodiment, is shown in the attached drawing.

The utility model is a drainage-vacuum unit, which includes:

1 - control sump;

2 and 3, preferably horizontal and vertical connecting pipes;

4. - fitting at the end of the horizontal connecting pipe;

5. - ball valve;

6. - a typical carpet;

7. - the probe tube is polyethylene;

8. - a vacuum pump;

9. - measured capacity;

10 - pipeline

Sequence of work.

Using a megaohmmeter, a section with suede insulation is determined. Reflectometer determine the location of jamming. According to the profile of the actuating circuit or in kind, the low point of the pipeline is determined. In the chamber closest to the jamming, and in the absence thereof, in the pit, as close as possible to the lowest point of the route profile, a hole is drilled in the polyethylene sheath of the PI pipe and the device is mounted using the nozzle and pipelines. A vacuum pump creates a vacuum of P = 0.01 MPa, which is maintained for 2-3 hours (depending on the remoteness of the insulation jamming place). Ball valve close; under the influence of the pressure difference, a stable capillary flow of moisture-containing gases and condensate is formed into the control water collector. Moreover, if insulation jamming occurred during installation, and then sealed polyethylene couplings were made, then drying will be carried out successfully, and the device can be dismantled or left as a control point for monitoring the insulation state if it is necessary to transfer the repair period to the inter-heating period.

By measuring the dipstick with the level markings applied on it, the liquid entering the control catchment is measured. Using a vacuum pump and a measuring tank, both volume measurement and sampling are carried out to determine the hardness of the water based on chemical analysis - whether it is network (coolant) or ground. This allows you to determine the nature of the leakage of the steel pipe or polyethylene shell of the PI pipe, which cannot be determined in another way.

Claims (2)

1. A device for removing moisture from the pipeline, which is a drainage-vacuum unit containing a control sump, preferably equipped with horizontal and vertical connecting pipes, while using a preferably horizontal pipe, the sump is connected to the hole at the bottom of the pipe, and preferably a vertical connecting pipe through a ball valve in a typical carpet and a probe tube, the water collector is connected to a vacuum pump equipped with a measuring tank. 2. The device according to claim 1, characterized in that preferably the horizontal pipe is equipped with a fitting for connecting to the hole at the bottom point of the pipeline.