JP2006035110A - Apparatus for cleaning pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for cleaning a pipe capable of uniformly removing contamination in a pipe over the whole length of the pipe even if the pipe is relatively long. <P>SOLUTION: For the removal of the contamination in a cleaning pipe 8, workers turn a lever 7A in a direction of an arrow A beforehand to flush water from a water supply pipe 9 in a direction of an arrow B toward into the cleaning pipe 8. Next, by turning an unillustrated power source on, a timer operates, a solenoid valve 5 opens and closes, for example, every one second interval by an output signal from the timer and nitrogen gas 10 from a nitrogen cylinder 2 is intermittently injected into the cleaning pipe 8 through a nitrogen supply pipe 3. As a result of this, numberless foams of nitrogen gas 10 flow in the direction of the arrow B with water while moving about in the cleaning pipe 8 (while storming), and the contamination on the inner surface of the cleaning pipe 8 is removed by the flow of the foam of this nitrogen gas 10 and water. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pipe cleaning device for cleaning dirt on the inner surface of pipes such as water supply pipes and hot water supply pipes provided in, for example, hot spring facilities, factories and general houses.

In general, an organic solvent is mainly used for cleaning the inner surface of the pipe. In recent years, however, cleaning using an organic solvent has become impossible due to the problem of environmental pollution caused by the organic solvent. Therefore, an alternative cleaning method is desired. For example, Patent Document 1 discloses a method of cleaning the inside of a pipe by blowing carbon dioxide toward the inside of the pipe.
JP 2000-140782 A (paragraph 0009, FIG. 1)

  By the way, in the method according to Patent Document 1, if the tube is relatively short, the inside of the tube can be cleaned to some extent using carbon dioxide gas. However, carbon dioxide gas is easily dissolved in water, and the following problems arise when trying to clean a relatively long tube. That is, since carbon dioxide is dissolved in water, there is a problem that it is difficult to clean the entire length of the tube uniformly over the entire length of the tube. In addition, the pipe may be corroded by carbon dioxide gas.

  In view of the above problems, the present invention is to provide a tube cleaning apparatus capable of uniformly removing dirt in a tube over the entire length of the tube even with a relatively long tube.

  The present invention is configured to solve the above-mentioned problems, and the invention according to claim 1 is a pipe cleaning device for cleaning the inside of a pipe, and a liquid circulation means for flowing a liquid into the pipe; A tube cleaning apparatus comprising: nitrogen gas injection means for injecting nitrogen gas into a pipe through which a liquid flows.

  According to the first aspect of the present invention, since nitrogen gas is jetted into the pipe by the nitrogen gas jetting means, the nitrogen gas moves around in the pipe by the flow of liquid, so that it adheres to the inner surface of the pipe. Stained dirt can be efficiently removed over the entire length of the tube.

  The invention according to claim 2 is the tube cleaning device according to claim 1, wherein the nitrogen gas injection means intermittently injects nitrogen gas into the tube.

  According to the second aspect of the present invention, since the mass of nitrogen gas is intermittently and vigorously injected toward the inside of the pipe, the dirt adhering to the inner surface of the pipe can be more efficiently removed by the nitrogen gas. Can do.

  According to invention of Claim 2, the cleaning power in the pipe | tube by nitrogen gas can be improved further.

  As described above in detail, according to the present invention, it is possible to increase the detergency against dirt adhering to the inner surface of the pipe by nitrogen gas even in a pipe having a long total length of the pipe and a pipe buried in the ground. . And the stain | pollution | contamination which made chlorine the main component which was not able to be removed with the washing | cleaning method using the carbon dioxide as described in patent document 1, for example can be removed efficiently. In addition, since the tube can be cleaned using nitrogen gas, there is no risk of environmental contamination, and cleaning can be performed at low cost.

  A tube cleaning apparatus according to an embodiment of the present invention will be described with reference to the attached drawings of FIGS. FIG. 1 is an overall view showing a tube cleaning apparatus according to the present embodiment, and FIG. 2 is an enlarged cross-sectional view of the cleaning tube as viewed from the direction of arrows II-II in FIG.

  As shown in FIG. 1, the pipe cleaning device 1 supplies a nitrogen cylinder 2 in which a nitrogen gas 10 (see FIG. 2) is sealed and a nitrogen gas 10 in the nitrogen cylinder 2 toward a cleaning pipe 8 described later. The nitrogen supply pipe 3 is provided. In the middle of the nitrogen supply pipe 3, a pressure reducing valve 4 for lowering the pressure of the nitrogen gas 10 flowing out from the nitrogen cylinder 2 into the nitrogen supply pipe 3 and a downstream side of the pressure reducing valve 4 are arranged. An electromagnetic valve 5, a check valve 6 disposed on the downstream side of the electromagnetic valve 5, and a T-shaped joint 7 that connects the water supply pipe 9, the nitrogen supply pipe 3, and the cleaning pipe 8 that are liquid circulation means are provided. It has been.

The pressure reducing valve 4 has a primary pressure gauge 4A and a secondary pressure gauge 4B. The primary pressure is set to about 10 MPa (about 100 kg / cm ² ), for example, and the secondary pressure is about 0.6 MPa (about 6 kg / cm ² ), for example. Is set to Incidentally, that the primary pressure by pressure reduction valve 4 is set to about from about 18 MPa (about 180 kg / cm ^2), the secondary pressure is set within a range of about 0.3～1MPa (about 3~10kg / cm ²⁾ preferable.

  The electromagnetic valve 5 circulates the nitrogen gas 10 in the nitrogen supply pipe 3 or blocks the flow of the nitrogen gas 10. That is, the electromagnetic valve 5 is electrically connected to a timer (not shown), and repeats the operation of opening the valve for 1 second and closing it for 1 second, for example, by an output signal from the timer. As a result, nitrogen gas 10 is intermittently injected into the cleaning tube 8 every second.

  The check valve 6 allows the flow of the nitrogen gas 10 from the electromagnetic valve 5 side toward the cleaning pipe 8 and prevents the reverse flow. The check valve 6 constitutes a nitrogen gas injection means together with the nitrogen cylinder 2, the nitrogen supply pipe 3, the pressure reducing valve 4 and the electromagnetic valve 5.

  The T-shaped joint 7 connects the cleaning pipe 8 to the nitrogen supply pipe 3 and the water supply pipe 9. The T-shaped joint 7 is configured such that the water supply pipe 9 communicates with the cleaning pipe 8 when the operator rotates the lever 7A in the direction of arrow A in FIG. When the lever 7A is rotated in the direction indicated by the arrow A 'in FIG. 1, the flow of water W (see FIG. 2) from the water supply pipe 9 to the cleaning pipe 8 is interrupted.

  The cleaning tube 8, which is a tube, is formed of a relatively long flexible hose of, for example, about 40 to 50 m, and one end side thereof is connected to the nitrogen supply tube 3 and the water supply tube 9 via the T-shaped joint 7. Then, nitrogen gas 10 from the nitrogen supply pipe 3 and water W from the water supply pipe 9 flow into the cleaning pipe 8 through the T-shaped joint 7. As a result, as shown in FIG. 2, bubbles of lump-like nitrogen gas 10 move in the direction of arrow B in FIG. 1 and FIG. Dirt on the inner surface is removed.

Next, the operation of the tube cleaning device 1 will be described.
First, the operator rotates the lever 7A in the direction of arrow A in FIG. 1 to direct the water W from the water supply pipe 9 into the cleaning pipe 8 in the direction of arrow B in FIGS. To flow. Next, when a power supply (not shown) is turned on, a timer is activated, and an electromagnetic valve 5 is opened and closed by an output signal from the timer, for example, every 1 second. Injected intermittently into the cleaning tube 8.

  As a result, as shown in FIG. 2, the bubble of the lump-like nitrogen gas 10 flows in the direction of arrow B in FIG. 1 and FIG. Due to the bubbles of the gas 10 and the flow of the water W, dirt on the inner surface of the cleaning tube 8 can be uniformly removed over the entire length of the cleaning tube 8. And as a result of washing | cleaning the washing | cleaning pipe | tube 8 by such a method, the stain | pollution | contamination which has as a main component the chlorine which was not able to be removed by the washing | cleaning method using the carbon dioxide as described, for example in patent document 1 is removed efficiently. I understood that I could do it.

  Therefore, according to the present embodiment, since the cleaning tube 8 can be cleaned using the nitrogen gas 10 having the property that it is difficult to dissolve in the water W, even when cleaning the relatively long cleaning tube 8, the entire length of the cleaning tube 8 is increased. The dirt on the inner surface of the cleaning tube 8 can be removed cleanly. Further, since the cleaning tube 8 can be cleaned using the nitrogen gas 10, it is possible to eliminate the risk of environmental pollution and to perform cleaning at a low cost.

  In the present embodiment, the case where the length of the cleaning tube 8 is set to about 40 to 50 m has been described as an example. However, the present invention is not limited thereto, and may be, for example, 50 m or more, or 40 m or less. But you can.

  In the present embodiment, the case where the cleaning tube 8 is formed of a flexible hose has been described as an example. However, the present invention is not limited thereto, and may be formed using, for example, a metal tube.

  Furthermore, in the present embodiment, the case where the water supply pipe (washing pipe 8) through which water W flows as a liquid has been described as an example. However, the present invention is not limited to this, and hot water or the like of a hot spring flows. The hot water supply pipe may be washed.

  In addition, the liquid that flows when cleaning the pipe is not limited to the water W, and can be changed as appropriate depending on the liquid flowing in the pipe (for example, drinking water such as soy sauce, hot spring water). For example, high-concentration chlorine water (50 mg / l) having a bactericidal effect may be passed through the pipe.

1 is an overall view showing a tube cleaning device according to an embodiment of the present invention. It is the expanded sectional view which looked at the washing pipe from the arrow II-II direction in FIG.

Explanation of symbols

1 Tube cleaning device 2 Nitrogen cylinder (nitrogen gas injection means)
3 Nitrogen supply pipe (nitrogen gas injection means)
5 Solenoid valve (nitrogen gas injection means)
8 Washing pipe (pipe)
9 Water supply pipe (liquid circulation means)
W Water (liquid)

Claims (2)

In a pipe cleaning device for cleaning the inside of a pipe,
Liquid flow means for flowing liquid into the tube;
Nitrogen gas injection means for injecting nitrogen gas into the pipe through which the liquid flows;
A tube cleaning apparatus comprising:   The tube cleaning apparatus according to claim 1, wherein the nitrogen gas injection means intermittently injects nitrogen gas into the tube.

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