RU225332U1 - DEVICE FOR REMOVING AIR CLOGS FROM PIPELINE - Google Patents

Abstract

The utility model is used on pipelines for various purposes, used in design, construction and operation and is aimed at increasing the efficiency of removing air plugs from the pipeline and reducing the material consumption of the installation due to its compactness. The claimed utility model is aimed at increasing the efficiency of removing air plugs from the pipeline and increasing the service life of the pump. A device for removing air pockets from a pipeline, containing an accumulating tank with a discharge pipe connected to a supply pipeline with a lower limit liquid level sensor, a relief valve triggered by a limit level sensor, characterized in that between the storage tank installed parallel to the supply pipeline and the discharge The branch pipe sequentially places a check valve, a control electromagnetic valve for air release, connected to the pipeline circulation pump and an automated control system, and a manual adjustable shut-off valve. 1 ill.

Description

The utility model is used on pipelines for various purposes and can be used in design, construction and operation.

The closest technical solution is a device for removing air plugs from a main oil product pipeline, including inlet and outlet pipes, an accumulating tank installed in series in the pipeline, a relief valve (valve) triggered by limit level sensors (RU, C1, No. 2424464, 2011).

The disadvantage of the known solution is the low efficiency of air removal in sections of pipelines where liquid enters the pipeline without pressure created by the injection unit. In addition, the known installation has significant dimensions.

The claimed utility model is aimed at increasing the efficiency of removing air plugs from the pipeline and increasing the service life of the pump.

The specified technical result is achieved by the fact that in a device for removing air pockets from a pipeline, containing an accumulating tank with a lower limit liquid level sensor and a discharge pipe connected to the supply pipeline, a relief valve, triggered by a limit level sensor, between the storage tank installed parallel to the pipeline , and the discharge pipe, a check valve, an automatic valve connected to the pipeline pump, and a manual adjustable shut-off valve are placed in series.

A device for removing air pockets from the pipeline is installed in front of the pipeline pump, controlled by a signal from the limit level sensor through an automated control system.

Figure 1 shows a schematic diagram of the installation.

The device for removing air pockets from the pipeline contains a lower limit level sensor 1 installed at the inlet of the storage tank 2 connected to the supply pipeline. At the outlet of the storage tank 2 there is a check valve 3, an automatic valve 4, a manual shut-off adjustable valve 5 and an air discharge pipe 6.

The automatic valve 4 is connected to the pipeline pump 7, located behind the device for removing plugs in the direction of the liquid supplied through the pipeline, and an automatic control system (hereinafter referred to as the ACS).

The device works as follows.

Air, which has a lower density in relation to the liquid, being in the area of the inlet pipe of the proposed device, is forced upward by the liquid under the force of gravity. When the storage tank 2 is filled with air, the lower limit level sensor 1, located above the level of the pump suction pipe, is triggered and sends a signal to the automatic control system.

To protect against false alarms and the possibility of transition of the foamed part of the liquid from the pipeline section to the accumulating storage tank 2, a timer is installed in the ACS: the duration of the signal from the lower limit level sensor 1 must be no less than the specified one (this time is set empirically during commissioning of the proposed device) , otherwise the timer is reset to zero. As soon as the duration of the signal from the lower limit level sensor 1 exceeds the set value, the ACS gives a signal to open the automatic valve 4 to bleed air and at the same time blocks the operation of pump 7.

After the air is displaced through the proposed device, and subsequent contact of the liquid with the lower limit level sensor 1, indicating complete filling of the supply pipeline, the lower limit level sensor 1 sends a signal to the automatic control system. The automatic control system counts the time for filling the storage tank 2 with liquid (this time is established empirically during commissioning of the proposed device). After the time has elapsed, the automatic control system gives a signal to close the automatic valve 4 and at the same time removes the block from the operation of pump 7.

If there is no signal from the lower limit level sensor 1 indicating the presence of liquid, the automatic valve 4 remains open, and the ability to operate the pump 7 remains blocked.

When liquid enters the supply pipeline, air is naturally displaced through the storage tank 2, check valve 3, automatic valve 4, manually adjustable valve 5 and air discharge pipe 6.

The use of check valve 3 between the storage tank 2 and the automatic valve 4 is due to the occurrence of vacuum in the pipeline section in front of the pump 7 and in the storage tank 2. Check valve 3 prevents the formation of reverse draft and the drawing of air from the atmosphere through the proposed device into the pipeline.

By means of shut-off valve 5, the air flow rate from tank 2 is regulated.

The claimed device for removing air plugs also makes it possible to reduce labor costs and shorten the cycle time of operations on self-priming sections of pipelines of automatic lines. In addition, the proposed device functions as a device for protecting pump 7 from running dry. By eliminating the operation of pump 7 in dry running mode, its service life increases.

Claims (2)

1. A device for removing air pockets from a pipeline, containing an accumulating tank with a discharge pipe connected to a supply pipeline with a lower limit liquid level sensor, a relief valve triggered by a limit level sensor, characterized in that between the storage tank installed parallel to the supply pipeline, and the discharge pipe, a check valve, a control electromagnetic valve for air discharge connected to the circulation pump of the pipeline and an automated control system, and a manual adjustable shut-off valve are sequentially placed. 2. A device for removing air pockets from a pipeline according to claim 1, characterized in that it is installed in front of the circulation pump of the pipeline, controlled by a signal from a limit level sensor through an automated control system.