JP2009022872A - Pipe washing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more reliably remove foreign matters from a water flow channel. <P>SOLUTION: A flowmeter 20 and an in-line filter apparatus 10 are installed in the downstream side terminal of a block water pipeline. The in-line filter apparatus 10 is equipped with a filter 5 having a function of trapping foreign matters, a freely openable or closable drainage pipe 9 and a filter back washing drainage pipe 8 installed in the upstream side and the downstream side, respectively, while sandwiching the filter 5. At the time of washing a pipe, both drainage pipes 8 and 9 are alternately opened based on the numeral value shown by the flowmeter 20 to increase the flow speed in the water flow channel to promote removal of the foreign matters by the increase of the flow speed. Further, a flow channel from which the foreign matters are to be removed is specified by operation of a switch valve installed in the middle of the block water pipeline and another flow channel is closed to further increase the flow speed. Furthermore, since the filter 5 of the in-line filter apparatus 10 is positioned in the downstream side of the pipe washing position, the foreign matters can be trapped and prevented from flowing to the flowing water pipe P in the downstream side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a washing tube method for removing contaminants in a running water pipeline.

Generally, a flowing water pipe line is rust-prevented by lining the inner surface of the pipe so that foreign matter does not enter the water flowing in the pipe. However, in the pipe construction of the flowing water pipe, metal powder, gravel, etc. generated when drilling work or cutting work may be mixed into the water in the pipe. Moreover, the rust which generate | occur | produces in the metal exposed part of the flowing water pipe line which arose during construction may mix in the water in a pipe | tube.
Since these contaminants deteriorate the quality of the water supplied downstream of the flowing water pipe, it is not preferable that the contaminants exist in the flowing water.

  As a technique for discharging the contaminants in the running water pipe outside the pipe, for example, by using a fire hydrant or a T-shaped tube, the water in the running water pipe is discharged all at once, so that the dust can be removed together with the water. There is a washing method for discharging outside the road (see, for example, Patent Document 1 and Patent Document 2).

In addition, a technique of a washing method for capturing contaminants by interposing an inline filter device in the middle of a flowing water pipe and passing water through a filter provided in the inline filter device is also disclosed (for example, a patent) Reference 3).
JP 2002-161559 A Japanese Patent Laid-Open No. 2004-283741 JP 2006-75817 A

In the pipe washing methods described in Patent Documents 1 and 2, it is difficult to discharge all the contaminants in the flowing water pipe.
In addition, in order to discharge more impurities, it is possible to discharge all the water in the flowing water pipe. However, this is not preferable because water is cut off on the downstream side, and it is not efficient because much discharged water is wasted.

In this regard, according to the washing tube method described in Patent Document 3, it is possible to capture more contaminants in the flowing water pipe by allowing all the water to pass through the filter.
However, when the flow velocity in the flowing water pipe is low, the contaminants may not reach the filter and may stay in the middle of the flowing water pipe.

  Then, this invention makes it a subject to make it possible to remove the foreign substance in a flowing water pipe line more reliably and efficiently.

In order to solve the above problems, the present invention uses a drain device of an inline filter device provided on the downstream side of a flowing water pipe to be washed, and the flow velocity in the flowing water pipe by opening the drain device. The method of promoting the washing tube by increasing the flow rate was adopted.
According to this washing pipe method, since the flow velocity in the flowing water pipe line is increased by opening the drainage device, the contaminants in the flowing water pipe line easily move along the flow as the flow velocity increases. Therefore, it is possible to efficiently remove impurities, that is, to wash the tubes. Moreover, since the filter of the in-line filter device is located downstream of the washing tube position, it is possible to capture the contaminants so as not to flow into the downstream flowing water conduit.

  A specific configuration is a washing tube method for removing contaminants intervening in the flowing water pipe, and a function of capturing the impurities intervening in the flowing water pipe by allowing water flowing in the flowing water pipe to pass therethrough. An in-line filter device comprising a filter having a filter and a drainage device provided on the upstream side or downstream side of the filter and having an opening / closing function for discharging the water to the outside of the flowing water pipe removes the impurities. It is arranged on the downstream side of the target water flow line, and by opening the drainage device, the flow velocity in the flow water line that is the target for removing the contaminants is increased, and the increase in the flow rate causes the contamination. This is a washing method for promoting the removal of objects.

In this configuration, the inflow filter that branches from the upstream side toward the downstream side into a plurality of flow paths (routes) as the flowing water pipes to be removed of the contaminants, and each of the branched flow paths is the downstream side inline filter At least one of the branched channels can be opened and closed, and the flow rate of the other channel is increased by closing the one channel, and the flow rate is increased. It can be set as the tube washing method which accelerates | stimulates the removal of the said contaminant.
If the washing tube method is adopted in a configuration in which a plurality of flow paths are branched, by actually selecting a flow path through which water is circulated from among the branched flow paths, an actual in-line filter device is provided from the upstream side. The cross section of the channel through which water flows can be increased or decreased.
For this reason, if the cross-sectional area is reduced, the flow velocity of the flowing water pipe to be washed can be further increased, and each flow path can be washed separately by sequentially switching the flow paths.

Further, each of the branched flow paths is a block water distribution pipe stretched like a mesh from the upstream side to the downstream side, and the inline filter device is disposed at the downstream end of the block water distribution pipe. A plurality of on-off valves are provided in the middle of the block water distribution pipe, and the pipe washing method can selectively open and close the branched flow paths by using the on-off valves.
If the inline filter device is at the downstream end of the block water distribution pipe, there are many routes in the flow path from the upstream side through the block water distribution pipe to the inline filter device. For this reason, if the number of closed channels is increased among the many branched channels (routes) in the block water distribution pipe, and the number of channels through which water actually flows is reduced, it is compared with the state in which all channels are opened. And the flow velocity of the flowing water pipe which becomes the object of washing pipe relatively can be raised more greatly. For this reason, it becomes possible to remove impurities more efficiently.

In addition, when the degree of opening and closing of the drainage device is adjustable, a velocimeter or flow meter is attached to the flowing water pipe from which the contaminants are to be removed, and corresponds to the numerical value indicated by the velocimeter or flow meter. The washing tube method can adjust the degree of opening and closing of the drainage device.
In this way, it is possible to maintain an optimum flow rate for removing impurities. The adjustment of the opening / closing degree of the drainage device can be automatically performed based on the numerical value indicated by the current meter or the flow meter.

Further, the drainage device may employ a configuration provided at least on the downstream side of the filter of the inline filter device. Or the structure provided in the upstream of the said filter 5 is also employable. Moreover, both can be provided together.
If drainage is performed on the downstream side of the filter, it is possible to simultaneously capture foreign substances by the filter. Moreover, if draining is performed on the upstream side of the filter, the flow velocity in the flowing water pipe is not easily affected by the resistance of water passing through the filter. For this reason, it is effective in improving the flow velocity, and large impurities can be discharged out of the pipe as they are without passing through the filter.

  In addition, as the drainage device, for example, it may be a drainage pipe for filter backwashing having a function of removing impurities attached to the filter of the inline filter device, or a casing in which the filter of the inline filter device is accommodated. Inside, various drainage devices such as a drain drainage pipe for discharging the foreign matter accumulated in the bottom of the casing can be used.

  As described above, according to the present invention, an efficient washing pipe is possible due to an increase in the flow velocity in the flowing water pipe accompanying the opening of the drainage device, and contaminants in the flowing water pipe are more reliably and efficiently removed. Can be removed.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 3A and 3B, the in-line filter device 10 used in the pipe washing method of this embodiment captures impurities in the casing 1 connected in the middle of the flowing water pipes P and P. A cylindrical filter 5 is disposed.

The inside of the casing 1 is partitioned into a lower chamber 2 and an upper chamber 3 through a partition wall 19. The lower chamber 2 is connected to the upstream water pipe P through the connection port 12, and the upper chamber 3 is connected to the downstream water pipe P through the connection port 13.
A drain drain pipe with an on-off valve 9a is provided at the bottom of the lower chamber 2 so that the water in the lower chamber 2, impurities floating in the water, and the impurities accumulated in the bottom of the lower chamber 2 can be discharged outside the pipe. 9 (drainage device W) is provided.

In addition, a cylindrical filter 5 having an upper end surface and a lower end surface is disposed in the upper chamber 3, and the lower end of the filter 5 faces a vertical through hole 19 a formed in the partition wall 19. Yes.
The lower end of the filter 5 is in contact with the partition wall 19 around the through hole 19a through a packing made of soft rubber over the entire circumference. For this reason, impurities are prevented from passing through the gap between the lower end of the filter 5 and the partition wall 19.

  The inner space of the filter 5 in the upper chamber 3 communicates with the lower chamber 2 through the through hole 19 a, and the outer space of the filter 5 in the upper chamber 3 is a discharge chamber 6. . The discharge chamber 6 communicates with the inner space of the filter 5 through a large number of through holes formed on the peripheral surface of the filter 5 that penetrate the inside and outside. The through-hole has a diameter that allows water flowing through the flowing water pipe P to pass therethrough and captures impurities that flow with the water.

  As shown in FIG. 5, the inner space of the filter 5 is partitioned into two chambers via a partition member 16 in the vertical direction. A cylindrical vertical shaft 16 a is fixed to the partition member 16 so as to be concentric with the cylindrical axis of the filter 5.

  A rotary shaft 15 is inserted into the vertical shaft 16a, and a fan-shaped upper partition plate 14 having a central angle of 180 degrees that closes a part of the upper end surface opening of the filter 5 is integrally provided at the upper end of the rotary shaft 15. It has been. A fan-shaped lower partition plate 11 having a central angle of 180 degrees that closes a part of the opening of the lower end surface of the filter 5 can be fixed to the lower end of the rotating shaft 15 with a nut 15a.

When attaching the rotary shaft 15 and the upper and lower partition plates 11 and 14 to the filter 5, the rotary shaft 15 is inserted into the vertical shaft 16 a and the upper partition plate 14 is brought into contact with the upper end edge of the filter 5. Next, below the filter 5, the lower end of the rotary shaft 15 is inserted into a hole provided in the center of the sector of the lower partition plate 11 and tightened with a nut 15 a, and the lower partition plate 11 is brought into contact with the lower end edge of the filter 5. Fix to state.
The filter 5 is fixed to the lid 17 of the casing 1 with a screw via a flange 5b provided projecting outward at the upper end edge. Further, the upper end of the rotary shaft 15 protrudes upward through the hole 17a of the lid 17, and an operating rod 18 is attached to the protruding upper end via a bolt 15b and a presser 18a.

  Since each of the upper and lower partition plates 11 and 14 is fixed in a direction facing the rotation shaft 15, the upper partition plate 14 is in a state where the upper surface of one space is closed with the partition member 16 interposed therebetween. The partition plate 11 will be in the state which closed the lower surface of the other space. If the rotary shaft 15 is rotated 180 degrees around the axis from that state, the upper and lower partition plates 14 and 11 also rotate while sliding on the upper edge or lower edge of the filter 5, and the upper partition plate 14 The upper surface of the space is closed, and the lower partition plate 11 is in a state of closing the lower surface of one space.

In a normal flowing water state except when the washing tube is carried out, the partition plates 11 and 14 are fixed to the filter 5 in the direction shown in FIG. 5, that is, the lower partition plate 11 sandwiches the partition member 16. The lower surfaces of both spaces are closed approximately half, and the upper partition plate 14 is also fixed in a state where the upper surfaces of both spaces are closed approximately half with the partition member 16 interposed therebetween.
For this reason, the water flowing in the flowing water pipes flows uniformly into both spaces with the partition member 16 interposed therebetween.

Further, in the inner space of the filter 5, as shown in FIGS. 3 and 4, a filter backwash drainage pipe with an on-off valve 8 a is provided through the upper end opening of the filter 5 and the hole 8 b of the lid 17. 8 (drainage device W) communicates.
This in-line filter device 10 is schematically shown in FIG. This FIG. 1 has shown the normal flowing water state except the time of implementing the said washing pipe. 1 and the on-off valves 8a and 9a indicated by the valve symbols in FIG. 2 described later and the on-off devices by the upper and lower partition plates 14 and 11 are shown in black for easy understanding. Those shown in white are open.

The operation at the time of washing is explained. For example, the upper partition plate 14 sandwiches the partition member 16 and closes the upper surface of one space, and the lower partition plate 11 closes the lower surface of the other space. In this state, the drain pipe 8 for backwashing the filter is closed in the inner space of the filter 5 by the upper partition plate 14 among the spaces on both sides separated by the partition member 16. It does not communicate with the space but communicates only with the opposite space (the other space).
For this reason, the space on the side communicating with the drain pipe 8 for backwashing the filter becomes a backwashing chamber 7 communicating with the discharge chamber 6 through the through hole, as shown in FIG.

  By opening the on-off valve 8 a of the filter backwash drain pipe 8, a reverse water flow from the outside to the inside of the filter 5 is generated in the backwash chamber 7. The water flow in the reverse direction allows the foreign matter adhering to the filter 5 ′ (filter b shown in the drawing) corresponding to the portion facing the backwash chamber 7 to be separated by so-called backwashing and discharged out of the pipe. (See arrow C).

Further, the space on the side not communicating with the filter backwash drain pipe 8 becomes the introduction chamber 4 which communicates with the discharge chamber 6 through the through hole and communicates with the lower chamber 2 through the through hole 19a. All the water flowing from the upstream side toward the downstream side through the flowing water pipe P passes through the filter 5 on the chamber 4 side (filter a shown in the figure), thereby capturing impurities contained in the water ( (See arrows A and B).
This trapping function can be used when the filter 5 'is backwashed, and water can be supplied to the downstream side even during the backwashing. For this reason, the function of backwashing can be exhibited without causing water downstream.

  In the state shown in FIG. 2 (a), the drain pipe 8 for backwashing the filter is in contrast to the filter 5 (filter a) that captures impurities contained in the water flowing from the upstream side toward the downstream side. The drainage device W is located on the downstream side.

  Further, by operating the operation rod 18 and rotating the rotary shaft 15 around the axis, the setting of the backwash chamber 7 and the introduction chamber 4 can be switched between the spaces on both sides of the partition member 16. .

  Therefore, when the rotary shaft 15 is rotated 180 degrees around the tube axis, the space on the side that is newly communicated with the filter backwash drainage pipe 8 is, as shown in FIG. The backwashing chamber 7 communicates with the discharge chamber 6 through the hole, and the filter 5 ′ (filter a shown in the figure) is backwashed (see arrow F).

  Further, the space on the side that is not communicated with the filter backwash drain 8 is an introduction chamber 4 that communicates with the discharge chamber 6 through the through hole and communicates with the lower chamber 2 through the through hole 19a. The filter 5 (filter b shown in the drawing) on the introduction chamber 4 side captures impurities contained in the water flowing in the flowing water pipe P from the upstream side toward the downstream side (see arrows D and E).

  That is, in the state shown in FIG. 2B, the drain pipe 8 for backwashing the filter is against the filter 5 (filter b) that captures impurities contained in the water flowing from the upstream side toward the downstream side. Thus, the drainage device W is located on the downstream side.

At this time, among the contaminants in the running water, those having a relatively high specific gravity accumulate in the lower chamber 2, so that as shown in FIG. 2 (c), if the on-off valve 9a of the drain drain pipe 9 is opened, together with the water These impurities can be discharged out of the tube (see arrow G).
In addition, since the lower chamber 2 is formed so that the inner diameter thereof is rapidly expanded as compared with the pipe diameter of the flowing water pipe P, it can be said that there is an effect that impurities in the flowing water are easily precipitated.
In addition, a relatively small specific gravity is captured by the filter 5 in the upper chamber 3.

  The in-line filter device 10 is provided at the downstream end of the block water pipe shown in FIG. The block water distribution pipe is a flowing water pipe P stretched like a mesh from the upstream side to the downstream side.

A plurality of on-off valves 30; a, b, c, d, e, f, g, h... Are provided in the middle of the block water pipe.
By opening and closing these open / close valves a, b, c, d, e, f, g, h,... As appropriate, for example, as shown by routes i, ii, and iii in the drawing, The channel can be selectively opened and closed.

Further, a velocimeter 20 is provided immediately upstream of the in-line filter device 10 at the downstream end of the block water pipe.
As the anemometer 20, for example, a rod-shaped electromagnetic anemometer can be used. A well-known flow meter may be used in place of the velocimeter 20.

  The degree of opening and closing of the on-off valves 8a, 9a of the filter backwash drain pipe 8 and the drain drain pipe 9 of the in-line filter device 10 can be adjusted, and is fully open, fully closed, and fully open and fully closed. It can be set to any open / close position between and the opening can be maintained.

  A method for washing the running water piping of each part in the block water pipe will be described below.

  Now, let the flowing water pipe P, which is the target for removing the impurities, be the flow path of the route i shown in FIG. The on-off valves e, g, and h are all closed, and the on-off valve f is open. The anemometer 20 is attached to the end of the flow path (fluid pipe P) indicated by the route i.

First, by opening the on-off valve 8a of the drain pipe 8 for backwashing the filter while the on-off valve 9a of the drain drain pipe 9 is closed (see FIG. 2 (a) or (b)), impurities in the filter 5 Is discharged.
Next, the open / close valve 8a of the drain pipe 8 for backwashing the filter is closed, the open / close valve 9a of the drain drain pipe 9 is opened (see FIG. 2 (c)), and water is drained and impurities are discharged from the lower chamber 2. To do. As the opening / closing valve 9 is opened, the numerical value indicated by the anemometer 20 increases, and the state is maintained when the numerical value reaches the appropriate flow velocity. If the flow rate does not increase to an appropriate value, the on-off valve 8a may be opened to increase the flow rate.

  During this time, switching between the backwash chamber 7 and the introduction chamber 4 may be performed as appropriate. Further, the opening / closing degree of both the on-off valves 8a and 9a may be appropriately adjusted in accordance with the numerical value indicated by the current meter 20. The flow rate appropriate for the washing tube is determined by the tube diameter, the pipe length, and the like.

  The selective opening and closing operation of the filter backwash drain 8 and the drain drain 9 is repeated, and when the amount of impurities discharged becomes small, the root i washing is terminated.

Next, let the flowing water pipe P which becomes the object which removes the said contaminant be the flow path of the route ii shown in FIG. The on-off valves a, b, c, f, g and h of the block water pipe are closed and the on-off valves d and e are opened. The anemometer 20 is attached to the end of the flow path (fluid pipe P) indicated by the route ii.
The work contents are the same as in the case of route i. In addition, a numerical value specific to the route ii is adopted as a flow rate appropriate for the washing tube (a flow rate at which impurities easily flow).

When the washing of the route ii is completed, the washing of the flow path of the route iii is performed. The on-off valves b, c, d, and f of the block water pipe are closed, and the on-off valves a and e are opened. The anemometer 20 is attached to the end of the flow path (fluid pipe P) shown in the route iii.
The work contents are the same as those of routes i and ii. In addition, a numerical value specific to route iii is adopted as a flow velocity appropriate for the washing tube (a flow velocity at which impurities easily flow).

As described above, since the filter backwash drainage pipe 8 of the in-line filter device 10 having the backwashing function is adopted as the drainage apparatus W used for the washing pipe, the backwash drainage of the filter is used to increase the flow velocity in the pipeline. It can be used and can contribute to the effective use of waste water.
For this reason, when washing a plurality of branched flow passages in order, it takes a relatively long time to finish the washing operation of all the flow passages, so that waste water for washing can be used. This type of inline filter device 10 is effective.
Further, if the drain drain pipe 9 is opened, the resistance when water passes through the filter 5 is less likely to affect the flow velocity in the flowing water pipe P. For this reason, it is advantageous in improving the flow velocity in the flowing water pipe P to be washed.

  In the above configuration, it is possible to appropriately open and close the on-off valves a, b, c, d, e, f, g, h. . Since the substantial cross-sectional area of the flow path can be increased or decreased by the opening and closing, the flow velocity can be adjusted by the increase or decrease. For this reason, it is convenient when adjusting the flow velocity in the flowing water pipe P to the appropriate flow velocity.

  In the above embodiment, the velocity meter 20 is provided at the downstream end of the block water distribution pipe, that is, at the end of the flowing water pipe to be washed, and immediately upstream of the inline filter device 10. 20 and a flow meter can also be provided in the middle of the flowing water pipe start end used as the object of a washing pipe, or the flowing water pipe. In addition, a plurality of velocimeters 20 and flow meters are provided, and the drainage device W and the on-off valves a, b, c, d, e, When each operation of f, g, h... is performed, it is more effective in maintaining an appropriate flow rate.

  Moreover, this washing pipe method is applicable not only to a block water pipe but to the flowing water pipe P which consists of another form. For example, it may be a flowing water pipe P that leads to the in-line filter device 10 by a single route from the upstream side to the downstream side, or branches into a plurality of route flow paths, and each of the branched flow paths is respectively The present invention is also applicable to the case where the same inline filter device 10 is used.

  When the water flow pipe branches into a plurality of routes, if each of the flow paths can be selectively opened and closed, as in the case of the block water pipe, at least one of the branched flow paths is used. If the path is closed, the other flow path can be the target of the washing tube, and the flow velocity in the target flow path can be increased or adjusted.

  Further, instead of the inline filter device 10 of the above embodiment, for example, an inline filter device 10 including the filter 5 shown in FIG. 7 may be used.

  The configuration shown in FIG. 7 will be described focusing on the differences from the above embodiment. In the inline filter device 10, a part of the partition member 16 that divides the inner space of the filter 5 rotates around the rotation axis 15 ′. It consists of a movable vertical partition plate 16 'and stopper walls 16c and 16d. The same is true in that the upper and lower partition plates 14 and 11 can rotate integrally around the rotation shaft 15. In this embodiment, the upper partition plate 14 has a fan shape with a central angle of 150 degrees having bus bars 14a and 14b, and the lower partition plate 11 has a fan shape with a central angle of 210 degrees having bus bars 11a and 11b.

  In the state shown in FIG. 7A, the movable vertical partition plate 16 'is fixed at a position where it hits the stopper wall 16d. By the partition member 16 including the movable vertical partition plate 16 ′, the inner space of the filter 5 is partitioned into a relatively small introduction chamber 4 and a relatively large backwash chamber 7.

  By rotating the rotating shaft 15 ′, the movable vertical partition plate 16 ′ is moved from the position shown in FIG. 7A in the direction of the arrow V to a position where it hits the stopper wall 16 c. Subsequently, by rotating the rotating shaft 15, the upper partition plate 14 and the lower partition plate 11 are rotated in the direction of the arrow W, and the partition member 16 is in the state shown in FIG. The backwash room 7 is switched to each other.

  Further, by rotating the rotating shaft 15 'by the reverse operation, the movable vertical partition plate 16' is moved in the direction of the arrow X from the position shown in FIG. 7B to the position where it hits the stopper wall 16d. Subsequently, if the upper partition plate 14 and the lower partition plate 11 are rotated in the direction of the arrow Y by rotating the rotating shaft 15, the partition member 16 can be brought into the original state shown in FIG. it can.

The filter backwash drain pipe 8 is set so as to face the region sandwiched between the stopper walls 16c and 16d from above the casing 1, and is always back directly below the filter backwash drain pipe 8. A washroom 7 is located. For this reason, the effect that the foreign substances adhering to the filter 5 are easily separated can be expected.
It is effective to increase the flow velocity of the flowing water pipe P that is the target of the washing tube because the contaminants adhering to the filter 5 are more surely detached because the passage resistance of the water passing through the filter 5 is reduced. .

  Further, the series of operations of the partition member 16 and the movable vertical partition plate 16 ′ shown in FIGS. 7 (a) and 7 (b) are continuously rotated by a single operating rod 18 by interlocking the rotary shafts 15 and 15 ′. It can also be operated continuously by operation.

  Furthermore, the inline filter device 10 may be configured as shown in FIG. 8 without a backwashing function. Moreover, in each embodiment, when it is not necessary to grasp | ascertain the flow velocity of the water in a flowing water pipe line by numerical value, installation of the velocity meter 20 or a flow meter can also be abbreviate | omitted.

The schematic diagram which shows arrangement | positioning of the in-line filter apparatus of one Embodiment, and an anemometer FIG. 1 shows the operation of FIG. 1, (a) is a schematic view showing when filter b is backwashed, (b) is when filter a is backwashed, and (c) is when the drain drain pipe is opened. (A) (b) is sectional drawing of the in-line filter apparatus of the embodiment Partial cut side view of FIG. The exploded perspective view of the in-line filter device of the embodiment Schematic diagram of block water pipe (A) (b) is a principal part enlarged plan view of the in-line filter apparatus of other embodiment. The schematic diagram which shows arrangement | positioning of the in-line filter apparatus and flow velocity meter of other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2 Lower chamber 3 Upper chamber 4 Introduction chamber 5 Filter 6 Discharge chamber 7 Backwash chamber 8 Drain pipe 8 'for filter backwash Drain pipe 9 Drain drain pipe 10 Inline filter device 11 Lower partition plates 12, 13 Connection port 14 Upper part Partition plate 15, 15 ′ Rotating shaft 16 Partition member 16 ′ Movable vertical partition plate 17 Lid 20 Current meter P Flow channel W Drainage device

Claims (7)

  A filter having a function of trapping impurities present in the flowing water pipe P by allowing the water flowing in the flowing water pipe P to pass through in the washing pipe method for removing the impurities present in the flowing water pipe P. 5 and a drainage device W provided on the upstream side or downstream side of the filter 5 and having an opening / closing function for discharging the water out of the flowing water pipe P. It is arranged downstream of the flowing water pipe P to be removed, and the drainage device W is opened to increase the flow velocity in the flowing water pipe P to be removed of the contaminants. The tube washing method which accelerates | stimulates the removal of the said contaminant by raise | lifting.   The flowing water pipe P that is a target for removing the contaminants is branched into a plurality of flow paths from the upstream side to the downstream side, and each branched flow path leads to the inline filter device 10 on the downstream side. , At least one of the branched channels can be opened and closed, the flow rate of the other channel is increased by closing the one channel, and the contaminants are removed by increasing the flow rate. The tube washing method according to claim 1, wherein the washing is promoted.   Each of the branched flow paths is a block water distribution pipe stretched like a mesh from the upstream side to the downstream side, and the inline filter device 10 is disposed at the downstream end of the block water distribution pipe. The washing apparatus according to claim 2, wherein a plurality of on-off valves are provided in the middle of the block water pipe, and each of the branched flow paths can be selectively opened and closed by the on-off valves. Tube method.   The opening / closing degree of the drainage device W can be adjusted, and a flow meter or a flow meter is attached to the flowing water pipe P that is a target for removing the contaminants, corresponding to the numerical value indicated by the flow meter or the flow meter, The washing method according to any one of claims 1 to 3, wherein the opening / closing degree of the drainage device W is adjusted.   The washing method according to claim 4, wherein the adjustment of the degree of opening and closing of the drainage device W is automatically performed based on a numerical value indicated by the current meter or the flow meter.   The said drainage apparatus W is provided in the downstream of the said filter 5 of the said in-line filter apparatus 10 at least, The washing pipe method in any one of the Claims 1 thru | or 5 characterized by the above-mentioned.   The said drainage apparatus W is provided in the upstream of the said filter 5 of the said in-line filter apparatus 10 at least, The washing method in any one of the Claims 1 thru | or 6 characterized by the above-mentioned.

Images