RU2492003C2 - Method of cleaning inner surfaces of hollow structures and device to this end - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to cleaning inner surface of tubular structure, e.g. tubes, chutes, etc of solid and liquid dirt and may be used in whatever industry. Proposed method comprises forming three cavities inside structure to be cleaned. Note here that first and second cavities are formed by deflected sections. Third cavity is formed by first length an structure walls. Gas is fed into first cavity while fluid is fed into second cavity. Note here that gas in first cavity is periodically fed into second cavity. Mix formed in second cavity is fed into third cavity. Note here that second length reciprocates in said third cavity. Proposed device comprises chambers communicated with fluid and gas feed systems and tube lengths arrange there inside. One end of pipe lengths is deflected and secured over the edges of appropriate chamber while opposite end is connected with appropriate pull mechanism. Said tube lengths are communicated with said fluid and gas systems to periodically shut them off.

EFFECT: higher efficiency of cleaning.

5 cl, 2 dwg

Description

The invention relates to the field of cleaning tools for hollow products, internal surfaces of complex structures (both closed and open, for example, pipelines of complex shape, trays, etc.) from various kinds of solid and liquid contaminants on their internal surfaces and can be used in a number of industries: chemical, food, energy - and housing and communal services.

There are various methods for cleaning pipelines using rigid pipe cleaning devices of various designs, pistons (patent RU 2381841 C1, B08B 9/053, 2010; patent RU 2312718 C1, B08B 5/02, F28G 3/16, 2007; patent RU 2147649 C1, E03F 9/00, B08V 9/02, 2000, etc.). A device for cleaning the inner surface of pipelines, based on the mechanical loosening of precipitates and further leaching of pulp from the pipeline (patent RU 2394656 C2, VV 9/049, 2010).

The disadvantages of these methods are the limited scope, the inability to clean open hollow structures (trays, etc.), the difficulty and often the inability to clean hollow structures of complex shape.

Known methods for cleaning hollow structures (in particular pipelines) by working agent jets, chemicals (ed. St. USSR 578128, B08B 9/04, 1977; patent RU 2288789 C1, BBB 9/047, 2006, etc.).

The disadvantages of these methods are the complexity, the inability to use on open facilities, low efficiency when applied over long distances, in some cases - the danger and high cost.

A known method of cleaning the inner surfaces of complex closed structures, based on the chemical interaction of special adsorbing substances with contaminants on the inner surface of the cleaned structure (patent RU 2424071 C1, VB 9/027, 2011).

The disadvantages of this method are the difficulty (impossibility) of the selection of special adsorbing substances for each type of pollution, the high cost and low feasibility of using it at facilities characterized by strong non-specific pollution (in particular, at public utilities).

Known methods for cleaning pipelines based on pneumo-impulse influences (patent RU 2312718, B08B 5/02, F28G 3/16, 2007; US patent No. 1998902, B08B 9/00, 1967, etc.). The closest in technical essence and the achieved result is a known method of cleaning the inner surface of pipelines from contamination, based on the generation of shock waves in the liquid filling the cleaned pipeline (patent RU 2179082C2, B08B 9/04, B08B 9/032, 2002).

The disadvantages of these methods are low versatility, the inability to use when cleaning structures having an open configuration, the complexity of the devices used.

The objective of the invention is to simplify the technology and design used for cleaning the internal surfaces of hollow structures of devices, increasing the speed of cleaning and increasing its effectiveness.

The task is carried out by a combination of inventions.

A method of cleaning the inner surfaces of hollow structures involves creating three cavities in a structure (for example, a pipeline, a tray), the first and second cavities being formed by bent portions of the sleeves, and the third by the first sleeve and walls of the structure, with gas being supplied to the first cavity and the second to the second - liquid, with gas being supplied to the first cavity, liquid being supplied to the second, while the gas in the first cavity is periodically supplied to the second cavity, and the mixture formed in the second cavity is supplied to the third cavity, while in the third strip tee move the second sleeve back and forth.

Periodic opening of the end of the sleeve, the cavity of which is filled with gas, allows the generation of shock waves in the fluid filling the structure, which increases the speed and quality of cleaning.

A device for cleaning the inner surfaces of hollow structures (includes chambers in communication with fluid and gas supply systems located in the chambers of the sleeve, one end of each of which is bent and fixed around the perimeter of the corresponding chamber, and the second is connected to the corresponding traction mechanism, while the sleeves are communicated with liquid and gas supply systems with the ability to provide periodic overlap of these systems and their communication with each other.

The implementation of the traction mechanism of the drive reversing drum, on which a flexible connection is wound connected to the end of the sleeve, simplifies the design of the device and speeds up the cleaning process.

The installation at the end of the flexible connection of the slings connected to the end of the sleeve, allows to simplify the design of the device and to provide the possibility of periodic opening of the end of the sleeve to generate shock waves in the liquid.

The drawings show:

figure 1 - device for cleaning;

figure 2 - the end of the open sleeve.

The device shown in Fig. 1 is made of two chambers 1, with reversible driving drums 2 installed on them, on which flexible connection 3 is wound. Chambers 1 have pipes 4. Chambers 1 are connected to each other by a pipe 5 with a valve 6. At the ends of the pipes 4 along their perimeter the ends of the sleeves 7, 8 are fixed. The second ends of the sleeves 7, 8 are bent and slings 9 are connected to a flexible connection 3. The cavity 10 is in communication with the gas supply system 11. The cavity 12 is in communication with the fluid supply system 13. Sleeves 7, 8 are placed in a hollow structure (for example, a tray) 14. The walls of the structure and sleeve 7 form a cavity 15.

Figure 2 shows the open end 16 of the sleeve 8. At the end 16 of the sleeve 8 secured slings 9, which are connected to a flexible connection 3.

The device depicted in figure 1, operates as follows.

Tray 14 is filled with water. At the beginning of the tray, pipes 4 are installed. After that, compressed air is supplied to the cavity 10 by the system 11. The sleeve 7 begins to displace water from the tray 14. In this case, the sleeve 7 moves at the top of the tray, since it is filled with air.

Since sleeve 7 was swollen, it rested on the walls of the tray and sealed the tray in the upper part. Under the sleeve 7, a sealed cavity 15 is formed, in which the sleeve 8 is located.

Feeding air into the cavity 10, deploy sleeve 7 to the full length. Then the air is pumped into the cavity 10 to the ultimate pressure, which can withstand the sleeve 7. After that, the system 13 in the cavity 12 serves water. The sleeve 8 is deployed in the cavity 15 and displaces water from the tray 14, which accelerates along the sealed cavity 15 formed by the walls of the tray 14 and the sleeve 7. Water erodes deposits located in the lower part of the tray 14 and removes them from it.

After that, the valve 6 is opened and air 11 is supplied to the cavity 10 by the system 11, and water is supplied to the cavity 12 by the system 13.

The sleeve 8 is moved in the cavity 15 reciprocatingly, while the end 16 of the sleeve 8 is opened and closed. Water and air in the tray 14 accelerate and erode deposits that are carried out from the tray 14. The cavity 10 is a receiver for gas, which enters the cavity 12 and displaces the liquid into the cavity 15.

In this way, a high flow rate is achieved which is sufficient to blur sediments.

EXAMPLE

The storm sewer tray was cleaned with the following parameters: length 150 m, depth 1.5 m, width 0.5 m. The hardness of the deposits was 0.9 on the Mohs scale.

Cleaning was performed by the device depicted in figures 1, 2.

Two sleeves with a diameter of 550 mm and a length of 160 m each were made of rubber fabric.

Sleeves are designed for a working pressure of 0.8 MPa. Sleeve 8 was reversibly moved with an amplitude of 25 m.

The tray was cleaned of all deposits.

The use of the invention allows to clean the inner surface of open hollow structures, for example, storm drainage trays.

Claims (5)

1. The method of cleaning the inner surfaces of the hollow structures, including the creation of three cavities in the hollow structure, the first and second cavities are formed by bent sections of the sleeves, and the third cavity is formed by the first sleeve and the walls of the structure, with gas being supplied to the first cavity and liquid to the second, the gas in the first cavity is periodically supplied to the second cavity, and the mixture formed in the second cavity is supplied to the third cavity, while the second sleeve is moved back and forth in the third cavity. 2. The method according to claim 1, characterized in that the end of the sleeve is periodically opened. 3. A device for cleaning the inner surfaces of hollow structures, including chambers in communication with fluid and gas supply systems located in the chambers of the sleeve, one end of each of which is bent and fixed around the perimeter of the corresponding chamber, and the second is connected to the corresponding traction mechanism, while the sleeve communicated with fluid and gas supply systems with the ability to provide periodic overlap of these systems and their communication with each other. 4. The device according to claim 3, characterized in that the traction mechanism is made of a drive reversing drum, on which a flexible connection is wound, connected to the end of the sleeve. 5. The device according to claim 4, characterized in that at the end of the flexible connection slings are installed that are connected to the end of the sleeve.

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