RU44549U1 - PURE POLYURETHANE PISTON (PEP) (OPTIONS) - Google Patents

Abstract

The utility model relates to devices for cleaning the internal cavity of main, field pipelines and solves the problem of creating a simple and reliable design that provides a high degree of cleaning of pipelines. The problem is solved by a cleaning piston containing a tubular body, equipped at the ends with disk blocks, rigidly fixed to the body, each block consists of one or more guide, one or more cleaning discs and spacers, and the guide disks in the packages are located closer to the ends of the case . Spacer elements can be made in the form of intermediate discs separating the guides and the cleaning discs. The disk blocks or the entire package of blocks can be pulled together by a screw pair between a flange mounted on the housing, for example, by welding, and a pressure ring. The treatment piston can be bi-directional, i.e. It can be used to drag the piston forward and backward.

Description

The utility model relates to devices for cleaning the internal cavities of existing trunk and field pipelines and can be used to separate varietal oil products during their sequential pumping through the same pipeline, as well as to clean cavities from construction waste, displace air or remove water from the pipeline cavity during hydrotesting.

A device for cleaning pipes according to the USSR AS No. 2180613, IPC B 08 V 9/04, 2002.03.20, including cleaning elements mounted on a flexible shaft with an eccentricity and connected to the rod through a flexible coupling. Between the cleaning elements mounted rigidly by means of fastening mechanisms on the shaft, spacer elements are placed in the form of rings worn on the shaft, while a centralizer with a disk is placed between the rod and the coupling connection.

The disadvantages of this device include the design complexity, low reliability and high cost.

Also known is a device for cleaning the inner surface of pipelines of the USSR AS No. 1041177, IPC B 08 V 9/04, Bull. No. 34, 09.15.83, containing a cuff, a sectional working body, each section of which includes spring-loaded levers arranged around the circumference with cleaning elements at the ends, and a section connecting unit containing connecting elements made in the form of a hinge, and a spring in the form of a spring stretching.

The disadvantages of this design include the complexity of the design, which leads to low reliability and high cost.

The technical problem solved by this utility model is the creation of a simple and reliable design that provides a high degree of cleaning of pipelines.

The problem is solved by a polyurethane treatment piston containing a tubular body equipped at the ends with at least two disk blocks, each block consists of one or more guide (support), one or more cleaning, and spacer elements separating the guide and cleaning disks.

Option 1: the piston contains in each block one supporting and one cleaning discs.

Option 2: the piston contains in each block one supporting and two cleaning discs.

Each of the disk blocks is pulled between a flange mounted on the housing, for example, by welding, and a clamping flange, using studs and nuts.

The treatment piston is bidirectional, i.e. It can be used to drag the piston forward and backward.

The guide discs in the packages are located closer to the ends of the housing.

All discs are made of polyurethane, but can be made of any other durable flexible elastomer.

The spacer elements can be made in the form of intermediate discs made of polyurethane or another durable flexible elastomer.

In all embodiments, the diameter of the guide disc is equal to or less by a certain amount of the inner diameter of the pipeline, the diameter of the cleaning disc is larger by a certain amount - the "tightness" - the inner diameter of the pipeline.

In all embodiments, the piston can be equipped with a metal (steel) brush or calibration disc.

The number of disk blocks, as well as the number of cleaning disks in a block, can vary depending on the tasks for which the piston is intended.

Figure 1 shows the treatment piston according to the first embodiment, comprising a tubular body 1, equipped at the ends with disk blocks, each block consists of a guide disk 2, a cleaning disk 3 and intermediate disks 4 separating them, each block is pulled together with a stud and nut 5 between the flange 6, rigidly fixed to the housing, for example, by welding, and a clamping flange 7.

Figure 2 presents the treatment piston according to the second embodiment, comprising a tubular body 1, equipped at the ends with at least two disk blocks, each block consists of a guide disk 2, two cleaning disks 3, intermediate disks 4 separating the guides 2 and the cleaning 3 disks moreover, the entire package is pulled between the flange 6, mounted on the housing, for example, by welding, and the pressure flange 7 with a pin and nut 5.

The guide discs 2 in the packages are located closer to the ends of the housing 1.

In all cases, the ends of the housing 1 are muffled.

In all embodiments, the supporting disks 2 and treatment disks 3 are made of an elastic material, for example, polyurethane, to ensure wear resistance and a constant level of tightness in the pipeline.

Polyurethane, as a material with high strength, resilience and elasticity, is preferable, however, disks can be made of another material close to the listed characteristics, for example, another elastomer.

Work with treatment pistons is as follows. When the piston is stocked in the pipeline, the support disk 2, having a diameter slightly smaller than the internal diameter of the pipeline, passes into the pipe freely, and the cleaning disk 3 is deformed, providing a snug fit to the walls.

The piston placed in the pipeline to be cleaned moves along the pipeline along with the flow of the pumped product due to the pressure difference in front of and behind the piston, i.e. a pressure drop of 0.04-0.05 MP is created.

The quality of cleaning and the high service life of the pistons are due to the high wear resistance of the material - polyurethane, which has both elasticity and hardness.

Purpose of polyurethane treatment pistons:

cleaning the cavity of pipelines from construction debris, soft (including oil) deposits and partially hard, removing condensate;

purging, flushing, testing, or preserving trunk and field pipelines under construction and in operation with shut-off valves having a uniform cross-section;

preliminary and final liquid removal, incl. displacement of oil and oil products from pipelines;

separation of different types of petroleum products when pumping them sequentially through the pipeline;

control over the process of cleaning the pipeline and the search for lost pistons in the pipeline (when installing the transmitter location of the piston (signaling device);

checking the bore of the pipeline (only for pistons with a calibration disk).

The use of pistons in the practice of cleaning pipelines will significantly improve the quality and efficiency of cleaning pipelines by increasing the wear resistance and high throughput of the piston.

Claims (12)

1. Polyurethane treatment piston (PPO), comprising a tubular body, equipped at the ends with disk blocks mounted on the housing, characterized in that each block consists of one guide, one cleaning disk and spacer elements. 2. The polyurethane treatment piston (PPO) according to claim 1, characterized in that the spacer elements installed between the guide and the cleaning discs are made in the form of discs of a smaller diameter. 3. The polyurethane treatment piston (PPO) according to claim 1, characterized in that the disk blocks mounted on the housing are pulled together with a stud and nut between a flange rigidly fixed to the housing and the pressure flange. 4. The polyurethane treatment piston (PPO) according to claim 1, characterized in that the piston is bi-directional. 5. The polyurethane treatment piston (PPO) according to claim 1, characterized in that the outer diameter of the guide disc is equal to or less by a certain amount of the inner diameter of the pipeline, the outer diameter of the cleaning disc is more by a certain amount - “interference” - the inner diameter of the pipeline. 6. The polyurethane treatment piston (PPO) according to claim 1, characterized in that the guide discs in the packages are located closer to the cleaning ends of the housing. 7. A polyurethane treatment piston (PPO), comprising a tubular body, equipped at the ends with disk blocks mounted on the body, characterized in that each block consists of one guide, two cleaning disks and spacer elements. 8. The polyurethane treatment piston (PPO) according to claim 7, characterized in that the spacer elements installed between the guide and the cleaning discs are made in the form of smaller diameter discs. 9. The polyurethane treatment piston (PPO) according to claim 7, characterized in that the disk blocks mounted on the housing are pulled together with a stud and nut between a flange rigidly fixed to the housing and the pressure flange. 10. The polyurethane treatment piston (PPO) according to claim 7, characterized in that the piston is bi-directional. 11. The polyurethane treatment piston (PPO) according to claim 7, characterized in that the outer diameter of the guide disc is equal to or less by a certain amount of the inner diameter of the pipeline, the outer diameter of the cleaning disc is more by a certain amount - “interference” - the inner diameter of the pipeline. 12. The polyurethane treatment piston (PPO) according to claim 7, characterized in that the guide discs in the packages are located closer to the cleaning ends of the housing.