JP2007021297A - Device for removing sludge in pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for removing sludge in a pipe, which is temporarily fitted to a hydrant or near a construction object water pipe so as to discharge sludge flowing at the pipe bottom without causing water-cut in the water pipe. <P>SOLUTION: A discharge pipe 4 is provided in a branch pipe 2 branched from the water pipe 1, the branch pipe 2 and discharge pipe 4 are connected to a suction side and a discharge side of a circulation pipe 7, respectively, a tip end part 4a of the discharge pipe 4 is opened toward an inner wall of an upstream side 1A of the water pipe 1, and a downwardly sloped baffle plate 8 is formed and disposed toward the other inner wall of the upstream side 1A near the tip end part 4a of the discharge pipe 4. A whirling flow A generated along the inner wall of the water pipe 1 floats and fluidizes sludge B on the pipe bottom 1b along the inner wall, and the floated-up sludge B is guided with the baffle plate 8. While resettling of the sludge B is prevented by the baffle plate 8, the sludge B is made to flow into the branch pipe 2 by causing water to flow to the suction side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improvement in an in-pipe turbidity removing device that draws running water from a distribution pipe such as tap water or industrial water, removes turbidity contained in the running water, and returns separated water to the distribution pipe.

  When repairing or replacing the water pipe, or due to aging of the pipe, turbidity such as sand particles, metal rust, and paint pieces enter the water pipe. Among these turbid substances, turbid substances having a large specific gravity or turbid substances having a large shape move or deposit on the bottom of the water distribution pipe. As a conventional method for removing turbidity contained in the running water of the water distribution pipe, a washing pipe work in which a hose or the like is attached to a fire hydrant installed in the water distribution pipe and the turbidity is discharged together with the discharge of the running water is the mainstream. In this case, unless the flow rate of the water extracted from the water distribution pipe to the fire hydrant is fast, it is difficult to discharge the turbidity in the pipe, and a large amount of water is required. This is a problem from the effective use of water, and the working time increases as the number of cleaning points increases. And as a method similar to this washing operation, a valve body is provided in a T-shaped branch pipe arranged in the water distribution pipe, and in a normal time, the flowing water flows down in parallel with the flow path, and when necessary, one of the upstream and downstream A T-tube for a fire hydrant with a valve that shuts off and discharges turbidity in running water to the fire hydrant side is known, for example, as described in Patent Document 1. In addition, a screen that blocks the movement of turbidity is stretched in the flow path of the water distribution pipe, and a dust collection pipe having an open / close valve is provided at the bottom of the pipe immediately before the screen, and a circulation pipe branched from the dust collection pipe is provided. A foreign matter removing apparatus that includes a wall body that communicates with an upstream water distribution pipe and blocks the water flow in the vicinity of the opening is also known as described in, for example, Patent Document 2.

JP 2002-161559 (paragraph number 0008 and paragraph number 0009, FIG. 1A) Japanese Patent No. 2728325 (Claim 1, FIG. 1)

  Sand and rust with a particle size of turbidity contained in the running water of the water distribution pipe approximately 0.1 to 4.8 mm starts to flow at the bottom of the pipe when the flow velocity becomes 0.4 m / sec or more. It has been elucidated that it flows a lot during the period. In the conventional method of discharging turbidity from the fire hydrant, local turbulent flow is generated near the inside of the branch portion of the water distribution pipe, and the turbidity is moved to the fire hydrant by riding on the turbulent flow. Since turbidity is discharged from the fire hydrant in an upward flow, sand, rust, etc. with large specific gravity are not effective in discharging. Foreign matter cannot be removed unless a large amount of water is drained, and the function of the foreign matter discharge facility is not fully fulfilled. Moreover, if the flow of running water in the water pipe is too fast, turbidity may not flow into the fire hydrant.

  The conventional T-tube for valve-equipped fire hydrant cuts half of the flow path to increase the flow rate of the water drawn into the fire hydrant and effectively remove turbidity. Normally, the valve body of the valve is used as the flow path. Since it is parallel, it becomes the flow resistance of the flow path. If a T-tube with a fire hydrant with a valve is installed in a place where turbidity removal is required, the amount of washing drainage discharged from the water distribution pipe becomes large, resulting in a large maintenance cost after installation. And the conventional buried type foreign matter removal device attached to the existing water distribution pipes, etc. is good because the turbidity collected by the screen flows into the garbage collection pipe at the bottom of the pipe and can be discharged by the water pressure difference if the on-off valve is opened. There is an advantage that turbidity can be removed. However, if a large amount of fine particles flows in, the screen captures the screen below the mesh width and becomes cake filtration. If the pressure loss increases, the screen cannot be washed unless the fluid pipe is cut off, and manual washing requires manpower, and automation requires electrical equipment. It is not preferable to put a screen, which is a resistor, into running water because the water flow resistance increases. This invention can be temporarily installed in the vicinity of a fire hydrant and a distribution pipe to be constructed, and can turbidity in the pipe that can discharge turbid substances such as sand and rust with a large specific gravity flowing through the pipe bottom without causing water breakage of the distribution pipe. A quality removal device is provided.

  The gist of the in-pipe turbidity removal apparatus according to the present invention is to remove the turbidity contained in the running water by extracting the running water from the water distribution pipe to the circulation pipe, and then separating the turbidity in the turbidity removal unit and returning the separated water to the water distribution pipe. In the recovery device, a discharge pipe is installed in the branch pipe branched from the water distribution pipe, and the branch pipe and the discharge pipe are respectively connected to the suction side and the discharge side of the circulation pipe, and the tip of the discharge pipe is inclined downward. The baffle plate formed in a descending gradient is disposed toward the other inner peripheral wall on the upstream side in the vicinity of the tip end portion of the discharge pipe. The discharge water from the discharge pipe generates a swirling flow along the inner peripheral wall of the water distribution pipe, and the suspended turbidity flowing down the bottom of the pipe and the suspended turbidity are suspended and fluidized, The turbidity floating along the peripheral wall is guided by a baffle plate and branched along with the suction water of the running water It can be made to flow to. Then, re-sedimentation of the turbidity due to the disturbance of the water flow at the branching portion is prevented by the baffle plate, and the swirling flow on the discharge side becomes a curtain shape with respect to the flowing water of the distribution pipe, thereby preventing the turbidity from flowing downstream. Further, not only the turbidity moving on the bottom of the water distribution pipe but also the entire pipe can be the target of turbidity removal.

The turbidity collection device may use a fire hydrant installed in the water pipe, and a pipe unit is detachably connected to the fire hydrant. A fire hose connection port, a circulation pipe suction side connection port, Each outlet port on the discharge side is opened, and a discharge pipe installed in the piping unit is connected to the connection port on the discharge side and hung on the fire hydrant, and the tip of the discharge pipe is formed in a downward slope. A baffle plate that opens toward the inner peripheral wall on the upstream side of the water pipe and has a downward slope near the tip of the discharge pipe is arranged toward the other inner peripheral wall on the upstream side. As a result, the large-diameter turbidity at the bottom of the tube can be floated, fluidized and discharged, and fire extinguishing activities can be performed without removing the piping unit. And if the baffle plate arranged in the vicinity of the tip of the discharge pipe is externally fitted to the tip of the discharge pipe, the discharge pipe can be extracted from the water distribution pipe together with the baffle plate.
It can be temporarily installed in the vicinity of the distribution pipe to be constructed, and it becomes a pipe turbidity removal device with a small installation space that can be easily installed and maintained on site.

  The in-pipe turbidity removal apparatus according to the present invention is configured as described above, and is economical because it does not require any special fixed structure. And it becomes temporarily possible to attach to the water pipe of the basin where sand mixing and rust peeling are expected, and it is not necessary to fix the turbidity removal device in the pipe. In addition, if a fire hydrant is used, the turbidity removal unit equipment installed in the fire hydrant is not fixed to the water distribution pipe, so there will be no unforeseen circumstances such as water outage of the water distribution pipe, and stable tap water, etc. Supply is possible. Furthermore, fire extinguishing activities can be performed without removing the piping unit.

  The pipe turbidity removal apparatus according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a branch pipe for extracting turbidity from a water distribution pipe, and is a water distribution pipe 1 for drinking water, industrial water or the like. A cylindrical branch pipe 2 is erected, and a suction pipe 3 on the suction side is connected to the upper side wall of the branch pipe 2, and the discharge pipe 4 on the discharge side is supported on the connection port 2a on the top wall of the branch pipe. Then, it hangs down inside the branch pipe 2. A circulation pipe 7 is connected to the rear end portion of the suction pipe 3 connected to the branch pipe 2 and the base end portion of the discharge pipe 4 via on-off valves 5 and 6. The on-off valves 5 and 6 are opened to allow the running water containing turbidity in the water distribution pipe 1 to flow into the branch pipe 2, to be supplied from the suction pipe 3 to the circulation pipe 7, and the separated water in the circulation pipe 7 is discharged from the pipe 4. It is made to return to the water pipe 1.

  2 to 4 are enlarged views of main parts of a branch portion of the water distribution pipe and the branch pipe, and are enlarged views of the branch portion of the branch pipe erected on the water distribution pipe. A tip end portion 4 a of the discharge pipe 4 suspended from the branch pipe 2 is formed in a downward slope and is opened toward the upstream side 1 </ b> A of the inner peripheral wall of the water distribution pipe 1. A baffle plate 8 is externally fitted to the upper portion of the distal end portion 4a of the discharge pipe 4, and is formed in a downward slope toward the inner peripheral wall on the upstream side opposite to the distal end portion 4a of the discharge pipe 4. is there. The baffle plate 8 fitted around the distal end portion 4 a of the discharge pipe 4 can be extracted from the water distribution pipe 1 together with the discharge pipe 4. As shown in FIG. 2, the discharge water from the discharge pipe 4 from which the turbidity has been separated generates a swirling flow A along the inner peripheral wall 1a of the water distribution pipe 1, and the turbidity B flows or deposits on the pipe bottom 1b. Is suspended and fluidized, and the suspended matter B floating along the inner peripheral wall on the other side is guided by the baffle plate 8 and flows into the branch pipe 2 along with the suction flow of running water. Further, the baffle plate 8 prevents re-sedimentation of the turbid B due to the turbulence of the water flow in the branch portion C of the distribution pipe 1 and the branch pipe 2. The swirling flow A on the discharge side with respect to the flowing water of the water distribution pipe 1 has a curtain shape, and prevents the turbid B from flowing out downstream. The turbidity B contained in the flowing water can be used not only for the turbidity B moving on the pipe bottom 1b of the water distribution pipe 8, but also for the entire water distribution pipe 1 as a turbidity removal target.

  FIG. 5 shows an embodiment using a fire hydrant installed in a water distribution pipe. A pipe unit 10 is detachably connected to a fire hydrant 9 installed in the water distribution pipe 1, and a bifurcated shape is formed on the upper side wall of the pipe unit 10. The suction pipe 11 is formed. A connection port 15 of a fire hose 14 provided with on-off valves 12 and 13 in the suction pipe 11 and a connection port 16 on the suction side to the circulation pipe 7 are provided. A discharge pipe 17 penetrating through the top wall of the piping unit 10 is suspended from the connection port 18 on the top wall of the piping unit 10, and an on-off valve 19 provided at the upper end of the discharge pipe 17 is separated by water. Is connected to the circulation pipe 7 on the return side. The on-off valves 13 and 19 connected to the circulation pipe 7 are opened, and flowing water containing turbidity in the distribution pipe 1 flows into the pipe unit 10, is supplied from the pipe unit 10 to the circulation pipe 7, and is connected to the discharge side of the circulation pipe 7. The separated water is discharged and returned from the pipe 17 to the water distribution pipe 1. Note that an open / close valve (not shown) provided in the fire hydrant 9 is opened and a discharge pipe 17 is inserted therein.

  As shown in FIGS. 2 and 3, the distal end portion 17 a of the discharge pipe 17 suspended from the fire hydrant 9 is formed in a downward slope and opens toward the upstream side 1 </ b> A of the inner peripheral wall 1 a of the water distribution pipe 1. A baffle plate 20 is externally fitted to the upper portion of the distal end portion 17a of the discharge pipe 17, and is formed in a downward slope toward the inner peripheral wall of the upstream side 1A on the opposite side of the distal end portion 17a of the discharge pipe 17. It is. The large-diameter turbidity of the pipe bottom 1b can be removed by floating and fluidizing using the fire hydrant 9, and the fire hose 14 is connected to the connection port 15 provided in the suction pipe 11 of the piping unit 10 to open and close it. If the valve 12 is opened, fire extinguishing activities can be performed without removing the piping unit 10. If the fire hydrant 9 is used, since the equipment of the piping unit 10 installed in the fire hydrant 9 is not fixed to the water distribution pipe 1, an unexpected situation such as a water cut-off state of the water distribution pipe 1 does not occur, and stable tap water, etc. Can be supplied.

  FIG. 6 is a flow chart of the turbidity removal apparatus in the pipe disposed in the water distribution pipe, which is connected to the suction side connection port 16 and the base end of the discharge pipe 17 formed in the piping unit 10 connected to the fire hydrant 9. A turbidity removal unit 21 is disposed in the circulation pipe 7. The turbidity removal unit 21 includes a water absorption pump 22 that sucks the flowing water containing the turbidity in the distribution pipe 1 into the circulation pipe 7 and a strainer 23 that separates relatively large solids such as floating substances, rust, and sand contained in the flowing water. And a membrane device 24 for separating fine particles. If the membrane device 24 is installed, it is possible to remove fine iron rust that causes red water and the like contained in tap water. When the strainer 23 and the membrane device 24 are clogged, an on-off valve 25... For switching the flow path of the circulation pipe 7 is provided, and the private generator 26 and the control panel 27 provided in the turbidity removal unit 21 are provided. Then, the water suction pump 22 and the on-off valve 25... Are operated to backwash and discharge the washing waste water.

  The water suction pump 22 disposed in the turbidity removal unit 21 is operated to generate a suction flow, and the suction flow is sucked into the pipe unit 10 connected to the fire hydrant 9 at a speed 10 to 30 times as high as that of the water distribution pipe 1. The separated water from which the turbidity is separated by the turbidity removal unit 21 is discharged at a flow rate equivalent to that of the suction flow and jetted from the pipe 4 to the water distribution pipe 1 to generate a swirling flow A along the inner peripheral wall 1a of the water distribution pipe 1. . Suspended and fluidized turbidity B that flows or deposits near the pipe bottom 1b of the branch C ′ of the water distribution pipe 1 and the fire hydrant 9 is floated and fluidized along the inner peripheral wall 1a, and the suspended turbidity B is guided by the baffle plate 20; The baffle plate 20 prevents the re-sedimentation of the turbid B due to the turbulence of the water flow in the branch part C ′. At the same time, a curtain-like swirling flow is generated with respect to the flowing water of the water distribution pipe 1, and the turbidity B is prevented from flowing downstream. Then, the turbidity B guided by the baffle plate 20 is caused to flow from the fire hydrant 9 into the circulation pipe 7 with a suction flow having a high flow rate. The suspended matter B moved to the circulation pipe 7 is removed by the strainer 23 and the membrane device 24 of the suspended matter removal unit 21 without being released to the atmosphere, and the separated separated water is returned to the distribution pipe 1. . Not only the turbidity moving on the pipe bottom 1b of the water distribution pipe 1, but also the entire water distribution pipe 1 can be targeted for turbidity removal. Since no equipment is provided inside the water distribution pipe 1, water flow resistance can be reduced, and there is no fear of water breakage by the equipment.

  The turbidity removal unit 21 may be mounted on a vehicle chassis and can be moved. If the turbidity removal unit 21 is loaded on a vehicle chassis, the turbidity removal unit 21 can be moved. The turbidity removal unit 21 can be connected to the fire hydrant 9 of the water distribution pipe 1 in the basin where mixing of sand and rust peeling are expected, such as valve operation due to emergency water leakage work or distribution plan change. It can be temporarily installed near the water distribution pipe 1 to be constructed, and the turbidity B can be prevented from flowing downstream to easily reduce turbidity problems such as tap water. The amount of water used to wash the collected turbid B at that time only needs to be washed with a strainer during operation, and only a minimum amount of washing wastewater is discharged compared to the amount of water discarded together with the turbidity of conventional washing pipe work. Just do it. In the membrane cleaning, simple cleaning may be performed after the work is completed.

  If the fire hydrant 9 is used, the turbidity removal equipment is not attached to the water distribution pipe 1, so that an unexpected situation such as a water outage condition of the water distribution pipe 1 does not occur, and stable tap water can be supplied. . The pressure loss can be suppressed as compared with a conventional buried strainer in which cake filtration may occur due to clogging. If the fire hydrant 9 is used, since no equipment is attached to the water distribution pipe 1, an unexpected situation such as a water outage state of the water distribution pipe 1 does not occur, and stable supply of tap water or the like becomes possible. In addition, construction costs are not incurred and it is economical. If the piping unit 10 is temporarily connected to the fire hydrant 9 of the water distribution pipe 1 in the basin where sand mixing or rust peeling is expected, sand mixing or rust peeling in the vicinity of the water pipe to be constructed is expected. It can be temporarily attached to the basin. There is no need to install a special fixed structure, and it is an on-pipe turbidity removal device that is easy to construct and maintain in the field and has a small installation space. It is also economical because the pump power for circulation in the circulation pipe can be reduced.

  The pipe turbidity removal apparatus according to the present invention is configured as described above, and the tip of the discharge pipe suspended from the fire hydrant or the branch pipe is formed in a downward slope toward the upstream side of the inner peripheral wall of the water pipe. Since the baffle plate is externally fitted to the upper part of the tip of the discharge pipe and formed in a downward slope toward the inner peripheral wall on the upstream side opposite to the tip of the discharge pipe, Not only turbidity that flows or deposits on the bottom but also the entire water distribution pipe can be targeted for turbidity removal. Since the separated water for removing turbidity is returned to the water distribution pipe, it is only necessary to discharge a minimum amount of washing waste water as compared with the amount of water discarded together with the conventional turbidity. And, unforeseen circumstances such as a water outage state of the water distribution pipe do not occur, and stable tap water is supplied. If a fire hydrant is used, fire extinguishing can be performed without removing the turbidity removal unit. Therefore, in addition to point installation with complaints from residents, it can be temporarily installed downstream of the piping work location, and is suitable for pipe turbidity removal devices such as tap water and industrial water.

It is a longitudinal cross-sectional view of the branch pipe suspended from the water distribution pipe of the pipe | tube turbidity removal apparatus which concerns on this invention. Similarly, it is the principal part longitudinal cross-sectional view of the branch part of the water distribution pipe and branch pipe which have arrange | positioned the discharge pipe and the baffle board. Similarly, it is a principal part cross-sectional view of the branch part of a water distribution pipe and a branch pipe. Similarly, it is a cross-sectional view of a branch pipe suspended from the water distribution pipe. Similarly, it is a longitudinal cross-sectional view of a piping unit using a fire hydrant. Similarly, it is a flowchart of an in-pipe turbidity removal apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water distribution pipe 1A Upstream side 1B Downstream side 2 Branch pipe 4, 17 Discharge pipe 4a, 17a Tip part 7 Circulation piping 8, 20 Baffle plate 9 Fire hydrant 10 Piping unit 14 Fire hose 15, 16, 18 Connection port 21 Turbid removal Unit B Turbidity

Claims (3)

  The running water from the water distribution pipe (1) is extracted to the circulation pipe (7), and the turbidity (B) contained in the running water is separated by the turbidity removal unit (21), and then the separated water is returned to the water distribution pipe (1). In the turbidity recovery device, the discharge pipe (4) is installed in the branch pipe (2) branched from the water distribution pipe (1), and the circulation pipe (7) is connected to the branch pipe (2) and the discharge pipe (4). Are connected to the suction side and the discharge side, respectively, and the tip (4a) of the discharge pipe (4) is formed in a downward slope, and is opened toward the inner peripheral wall on the upstream side (1A) of the water distribution pipe (1) In addition, a baffle plate (8) formed in a descending gradient is disposed in the vicinity of the tip (4a) of the discharge pipe (4) toward the other inner peripheral wall on the upstream side (1A). In-pipe turbidity removal device.   The running water from the water distribution pipe (1) is extracted to the circulation pipe (7), and the turbidity (B) contained in the running water is separated by the turbidity removal unit (21), and then the separated water is returned to the water distribution pipe (1). In the turbidity recovery device, the piping unit (10) is detachably connected to the fire hydrant (9) installed in the water pipe (1), and the connection port (15) of the fire hose (14) is connected to the piping unit (10). The connection port (16) on the suction side and the connection port (18) on the discharge side of the circulation pipe (7) are opened, and the discharge pipe (17) provided in the pipe unit (10) is connected to the discharge side. It is connected to the connection port (18) and hangs down on the fire hydrant (9), the tip (17a) of the discharge pipe (17) is formed in a downward slope, and the inside of the upstream side (1A) of the water distribution pipe (1) It opened toward the peripheral wall and formed in a downward gradient in the vicinity of the tip (17a) of the discharge pipe (17) Waffles plate (20) pipe contaminants removal device, characterized in that was toward the other of the inner peripheral wall of the upstream (1A) disposed.   The baffle plate (8, 20) is externally fitted to the distal end (4a, 17a) of the discharge pipe (4, 17), and the discharge pipe (4, 17) together with the baffle plate (8, 20) is a water distribution pipe. The in-pipe turbidity removal apparatus according to claim 1 or 2, characterized in that it can be extracted from (1).