JPS60102411A - Closing method for sea water headrace pipe - Google Patents

Abstract

PURPOSE:To efficiently close a headrace pipe, by a method wherein, after an expansive closing member is placed in a shrinked condition in the sea water headrace pipe, the closing member is expanded to bring it into firm adhesion to the inner wall of the headrace pipe. CONSTITUTION:An expansion closing member 4, formed with a balloon made of a material, such as rubber, being abundant in shrinkage characteristic, is placed in a shrinked condition in pipe end 2 of a sea water headrace pipe 1. Thereafter, when gas or fluid is fed in the closing member 4 through a gas feed pipe 9, a balloon is inflated, and the outer peripheral surface thereof is forced into contact with the inner wall of the pipe end 2 to close the pipe end 2. Thereafter, sea water in the headrace pipe 1 is replaced with fresh water or proper chemical solution, and such condition is left standing for a specified time. This permits cutting short of a life of sea lives adhered and accumulated to the inner wall of the headrace pipe 1, and this permits simple cleaning of the inside of the headrace pipe 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for chaining iiσ waterway waterways, and more specifically, the present invention relates to a method for chaining waterways, and more specifically, the present invention relates to a method for chaining waterways, more specifically, to kill and remove living organisms attached to the inner walls of waterway pipes for the purpose of seawater utilization. This invention relates to a method for closing a waterway pipe when converting seawater in the pipe into fresh water.

As is well known, conduit pipes intended for the use of seawater (e.g., seawater intake at thermal power plants) have various living organisms on the walls of the pipes due to the 7sigma of water. Attach, persevere, and gradually form a colony. For this reason, if the inner diameter of the office is a little t, its 17 power will be reduced by 1 degree.

Therefore, it is necessary to periodically remove the organisms that adhere to the inner walls of the water conduit pipes, but conventionally, the main method of removing these organisms is to use a dipper to dive into the water conduit pipes and scrape off the organisms. However, there was a problem in that it required a huge amount of effort and time. Therefore, it is desired to establish an effective and non-polluting removal method, and one such method is to close the water conduit pipe to isolate the inside of the water conduit from the surrounding environment, and to release 11σ water in the closed water conduit pipe to the wheat. A method has been devised in which the attached organisms are killed by replacing them with fresh water or a chemical solution suitable for J4.This is an extremely effective method that satisfies the above requirements. In order to do this, an effective method of sealing or closing the headrace pipe was required.

The present invention has been accomplished in the above points, and its gist is to place an inflatable closing member in a contracted state in the water conduit pipe, and then to inflate it. A method for closing a 1″1σ water channel pipe, which is characterized by closing the pipe by bringing it into close contact with the inner wall of the Y1σ water channel pipe, and its purpose is to: The object of the present invention is to provide a method for closing a water conduit pipe efficiently in terms of labor, and also a method that can be closed reliably. To efficiently and reliably carry out the replacement work by hand.

The present invention will be explained below based on examples. Figure 1 is a seawater conduit pipe! , for example, is a schematic diagram of a cooling water intake pipe at a thermal power station/J@tamp;
i! 'The end 2 opens into seawater 3.

First, a dipper dives into the sea and places the inflatable closure member 4 in the deflated state inside the tube end 2. As shown in Figs. 2 and 3, the material 4 is a balloon made of a highly contractible material such as natural or manufactured rubber, and the material 4 made of material 4 is a balloon made of a highly contractible material such as natural or manufactured rubber. The closed member 4 is placed in a proper position inside the tube end 2 while remaining in the contracted state. Also the fourth
As shown in FIG. 5, this inflatable closure member 4
It is also possible to have an R+J structure in which a disk-shaped closed 1011% 6 is provided with a length of υ inside a JA-shaped hollow body 5 made of a highly contractible material in the same manner as described above.

In the case of the hypertonic closed Iia member 4 shown in FIG. 4 and FIG. By hooking the hooks 7, 7 to the hooks 8, 8 installed at the top and bottom of the inner wall of the end of the conduit pipe l,
An inflatable closure member 4 can be placed inside the 11f end 2.

The work of the Diaper during i4 is only the arrangement of the inflatable closing member 4, and thereafter the inflatable closing member 4 may be inflated by operating it on 11σ or from land. That is, a delivery tube 9 is connected to the balloon shown in FIGS. 2 and 3 or the hollow body 5 shown in FIGS. 4 and 5, respectively, and the delivery pipe 9 is connected to the balloon shown in FIGS. i? ! /115, each inflatable closed M is made by introducing compressed air, a gas in the pond, a liquid such as water, or a mixture of these air and liquid into the f+iJ cylinder or hollow tube. :
'jls l4th can be expanded.

Gas is applied to the inflatable closing member 4 made of a balloon.
! When a mixture of gas and liquid is introduced, the balloon expands radially, and its outer periphery 1111 comes into contact with the inner wall of the conduit pipe 1 at the II end, thereby closing the end 2.

In the expandable closure member 4 made up of four hollow bodies 5, the expansion in the upper direction is restricted by the disc-shaped closure membrane 6, so the hollow body 5 mainly expands in the lateral direction, and the outer side of the hollow body 5 is ll1
The tube end 2 is closed by abutting the tube 7 against the inner wall of the end 2.

In any case of tensile closure, S6 material 4,'
The outer peripheral surface that comes into contact with the inner wall of the iW end 2 can be deformed to fit the unevenness of the inner tank, so even if marine organisms are attached to the inner wall of the a end, ・If@2 A: Closed tightly.

In the case of the inflation/injection member 4 shown in FIG. 4 and FIG. Also, the In2 'tM 14c bond in this case is
Since it can be made smaller than the expansion volume of the ball, the amount of fluid to be fed can be reduced accordingly, and the work efficiency can also be increased.

In addition, as mentioned above, gas, liquid, or a mixture of storage and liquid is used as the fluid to be fed into the 1' AM or the hollow 1 heather 5 in the description of L. Since buoyancy is generated, the scale and design of the headrace channel/Al! It is necessary to select the fluid to be fed, taking into account the degree of

As above, the 11th end 2 of the waterway +#1 is closed, so go back and fill the +14 water in the 6J71 If +W is shifted, it is possible to cut off the life of sea creatures attached to the inner wall of the headrace pipe l, ☆, Jim +:J, and by doing so, rlj cleaning inside the headrace pipe +2 l can also be done simply by doing 11)] I can do it.

As described above, according to the method of the present invention, .1f of the water conduit pipe 1
Self Iit L/7 at end 2. : Expanded Pi closure 1 member 4
When I was cuffed, the tube! /! ! a. Since the first part is adjusted so that it fits the unevenness of the inner wall of 2, the pipe end 2 is (if1i
It can actually be closed. And, for the closure 4 of the Hiko end 2, the tie bar is i&noj (sex closure 1 ? 1 ~ material 4 is placed in 7% of the tube end 2 +iIL/, and then the inflatability 1 is placed on IIU or from the ground. 'jJ chain part (Since only the inlet L is sent to O4, 1 (In conjunction with the certainty of closing the 17 end - C1 water intake and a's γ [l/jii) work is done with less effort. ,
It can be done in time.

As described in detail above, the present invention is characterized by arranging the +iσ water conduit water conduit pipe lining curved closed member in a contracted state, and then expanding it and layering it on the +ilj water conduit conduit conduit pipe. Since this is a seawater headrace pipe opening method that uses the R-sign to close the seawater headrace pipe, it is possible to close the seawater headrace pipe efficiently in terms of time and labor, and also has the advantage of being able to be closed reliably. be. Therefore, in the following, 1jσ water in the interrogation waterway's fresh water or i] by the appropriate chemical solution]it
By changing the crop, the work of removing invasive organisms is efficient and actually easy.

[Brief explanation of the drawing]

Figure 1m with z shows an example of unexploded iUJ, =,
(! 11J is the concept IXJ of the water conduit pipe that embodies the present invention.
NFigure 2 shows the inflatable closure member in a practical example.
Figure 3 is a partial cross-section of the water conduit pipe in the closed state, and Figure 3 is a partial cross-sectional view of the water conduit pipe with the expansion chain part 1 inflated, and Figure J 4 is also In the actual example of, II↓
Zhang ゛訃close 1 + d i, ll iA placed + '7 A partial view of the headrace of the staghorn tpu 4, Figure 5 is the same < jl
lν tensile closure term, >li expands material 4k rLQ
(1) =! , 4 water 11i'd (D-rtLij!
IIJ IJ S 61st Ai! iI, 5th grade ~゛1
- ~ Hongdae Moe 11]i 1J at 14.1Jl. ■...NJ3shi waterway・1nir 2・・・・tube end 4・・・bulge+1 length・geese closed

Claims (1)

[Claims] A seawater conduit characterized in that an inflatable closing member is arranged in a contracted shape in a seawater conduit pipe, and then expanded and brought into close contact with the inner wall of the seawater conduit pipe to close the pipe. How to close water pipes.