JP2017133314A - Method and device for discharging floating mud - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floating mud discharge method and a floating mud discharge device capable of safely discharging floating mud in a water intake channel of a thermal power plant or a nuclear power plant.SOLUTION: A floating mud discharge method using a floating mud discharge device 1 includes: a hose installation step in which an end of a string 3 is inserted into a water inlet 11 and submerged inside a tunnel section 21, and the string 3 is moved in a direction of an arrow A along with a water flow inside the tunnel section 21 to reach a branching location 22, and the string 3 is pulled up from a vertical hole inlet 24 through a vertical hole 23, thus installing a hose 4 by leading the hose to the vertical hole inlet 24 from the inlet 11; and a floating mud discharge step in which an end of the hose 4 is connected to a water discharge pump 2 and the water discharge pump 2 is driven to absorb from the hose 4 seawater around an end on the tunnel section 21 side, thereby absorbing from the hose 4 floating mud X floating or precipitating in the tunnel section 21. The configuration allows the floating mud to be discharged safely in a water intake channel.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a floating mud discharge method and a floating mud discharge device for discharging floating mud floating or settled inside a water channel for taking water from a water intake.

  Thermal power plants and nuclear power plants are equipped with facilities for taking water from water intakes installed near the coast and discharging used water from the water discharge channels for use in cooling and the like. In this intake channel, water always flows when the thermal power plant or nuclear power plant is in operation, so the floating mud does not float or settle, but the thermal power plant and nuclear power plant are When stopped, the flow of water is also stopped, and the mud may float or settle. Therefore, in order to take in seawater efficiently, it is necessary to discharge the floating mud in the waterway like this intake channel.

  Conventionally, when discharging floating mud floating or settled on the seabed, etc., the submarine dive on the seabed, etc., and the diver sucks the mud into the suction hose etc. It was.

  FIG. 5 is a schematic configuration diagram showing a conventional method for discharging floating mud. This discharge method is to discharge the floating mud X floating or settled in the vicinity of the sea bottom U by the earth transport ship G. First, the earth transport ship G approaches the sea area where the air mud X exists. When the mud ship X approaches the sea area where the floating mud X exists, the floating mud suction hose H1 is submerged from the sea level S to the vicinity of the sea bottom U by the crane K, and the diver M is supplied with the air supply hose N. Diving from the sea surface S to the seabed U. The diver M has a jet gun attached to the tip of the water discharge hose H2, and the jet gun raises the floating mud X and guides it to the vicinity of the tip of the floating mud suction hose H1. It is sucked into the mud suction hose H1.

  Thus, in order to discharge floating mud, a large-scale device and manpower are required. Furthermore, there is a possibility that the air supply hose N of the diver M may be sucked into the floating mud suction hose H1, which is dangerous. However, such a method of discharging mud is more dangerous for humans to enter because the water is flowing in the water channel when discharging the mud in the water channel such as the intake channel. In the case of a small diameter, it cannot be applied because it cannot be entered by a person.

  Therefore, a floating mud removal system in which a self-propelled mud absorbing device is attached to the tip of the floating mud suction hose is known (for example, see Patent Document 1). This mud removal system has a self-propelled means that self-propells the bottom of the water by driving an electric motor. It is intended to automatically and efficiently remove the bottom mud.

JP 2003-213721 A

  However, even with the floating mud removal system described in Patent Document 1, it is not easy to self-propelled by the self-propelled means in the water channel in which water flows, and the floating mud is not easily discharged. Remote control was not easy.

  Therefore, the present invention provides a method and a mud discharge method that can discharge the sludge safely even in a small-diameter channel that does not allow humans to enter the channel. An object is to provide a discharge device.

  In order to solve the above-mentioned problem, the invention of claim 1 is a method for discharging floating mud that discharges floating mud floating or settled inside a water channel for taking water from a water intake through the discharge port in the water channel. The linear body is inserted from the intake port, the linear body is guided to the discharge port according to the flow of the water, and the linear body is connected to the linear body by pulling out the linear body from the discharge port. A hose conduction step of passing a cylindrical hose from the intake port to the discharge port, a drainage pump attached to the discharge port side tip of the hose passed through the discharge port, and the intake side tip of the hose to the water channel And a drainage step of driving the drainage pump, sinking the floated mud together with the water, and moving the water inlet side tip of the hose to the outlet side. .

  In this invention, a hose conduction | electrical_connection process pulls out the linear body inserted from the water intake from the discharge port, and conducts the hose connected to this linear body from a water discharge port to a discharge port. Moreover, a floating mud discharge process attracts floating mud from the intake port side of the hose submerged in the water channel by a drainage pump attached to the discharge port side tip of the hose.

  The invention of claim 2 is characterized in that, in the float mud discharge method according to claim 1, an umbrella-like member that is spread in a substantially hemispherical shape by the flow of water is attached to the linear body. To do.

  Invention of Claim 3 is the floating mud discharge | emission method of any one of Claim 1 or 2, The fan-shaped member by which the opening side was extended is attached to the said water inlet side front-end | tip of the said hose, It is characterized by that.

  Invention of Claim 4 is a floating mud discharge apparatus which discharges the floating mud floating or settled in the inside of the water channel for taking water from a water intake from the discharge port in the water channel, from the water intake A linear body that is inserted and conducted to the discharge port according to the flow of water, and a cylindrical body that is connected to the linear body and is inserted from the intake port according to the linear body and conducted to the discharge port. A hose and a drainage pump that is attached to the discharge port side tip of the hose and sinks the floating mud together with the water from the water intake side tip of the hose submerged in the water channel. Is attached with an umbrella-shaped member that is expanded into a substantially hemispherical shape by the flow of water, the hose sucks the floating mud together with the water, and the water intake side tip is moved to the discharge port side, It is characterized by that.

  A fifth aspect of the present invention is the floating mud discharge device according to the fourth aspect, wherein a fan-shaped member having an open side is attached to a tip of the water intake side of the hose.

  According to the inventions of claims 1 and 4, the hose is conducted from the intake port to the discharge port through the linear body, the drainage pump is attached to the discharge port side of the hose, the intake port side of the hose is submerged in the water channel, As the mud is sucked in from the intake side, it becomes possible to safely discharge the mud from the water channel. In addition, it is possible to discharge floating mud even in a small-diameter channel where a person cannot enter the channel. Furthermore, since the water inlet side tip of the hose moves to the outlet side, the mud can be sucked over a wide range in the water channel, and the mud can be more reliably discharged.

  According to the second and fourth aspects of the present invention, since the linear body is attached with the umbrella-shaped member that is expanded in a substantially hemispherical shape by the flow of water, the linear body surely discharges along the flow of water. It becomes possible to flow to the side.

  According to invention of Claim 3 and 5, since the fan-shaped member by which the opening side was extended is attached to the water inlet side tip of the hose, it is possible to suck floating mud widely in the width direction in the water channel. This makes it possible to discharge mud more reliably.

It is a schematic block diagram which shows the hose conduction | electrical_connection process in the floating mud discharge method using the floating mud discharge apparatus 1 which concerns on embodiment of this invention. It is a schematic block diagram which shows the sludge discharge process in the sludge discharge method using the sludge discharge apparatus 1 of FIG. It is a figure which shows the umbrella-shaped member 31 attached to the string 3 of FIG. 1, the enlarged view (a) which shows the state which the umbrella-shaped member 31 moves the tunnel part 21 of FIG. 1, and the umbrella-shaped member 31 is FIG. It is an enlarged view (b) which shows the state pulled up from the branch location 22 to the vertical hole 23. It is an enlarged view which shows the fan-shaped member 46 attached to the water inlet side front-end | tip of the hose 4 which concerns on the modification of embodiment of this invention. It is a schematic block diagram which shows the discharge method of the conventional mud.

  The present invention will be described below based on the illustrated embodiments.

  FIG. 1 to FIG. 2 are configuration diagrams showing an outline of a sludge discharging method using a sludge discharging apparatus 1 according to an embodiment of the present invention, and FIG. 1 shows a hose conduction process in the sludge discharging method. FIG. 2 shows a floating mud discharge step in the floating mud discharge method. The floating mud discharge device 1 is used for intake water installed in the sea in order to take in seawater used for cooling, for example, installed in a thermal power plant or a nuclear power plant constructed near the coast. It is a device that discharges floating mud floating or settled inside the water channel, and is mainly composed of a drainage pump 2, a string (linear body) 3, and a hose 4.

  The drainage pump 2 is, for example, a pump that is driven by a motor to generate a pressure difference when the impeller rotates and generates a water flow by the pressure difference. Water and floating mud in the water channel are generated by the generated water flow. It is a device for sucking out and discharging floating mud. The string 3 is guided from the intake port in the water channel to the discharge port according to the flow of water in the water channel, and is formed of, for example, a vinyl material, and a hose 4 is connected to one end thereof. The hose 4 has a tip connected to the tip of the cord 3 and is formed in a cylindrical shape by a synthetic rubber or the like that is guided to the cord 3 and passed from the water intake port to the discharge port. Is connected to the drainage pump 2 and used to suck water and floating mud.

  The intake water channel in which such a sludge discharging apparatus 1 is installed includes, for example, an intake unit 10, an intake channel tunnel (water channel) 20, an intake channel 30, and an intake tank 40, as shown in FIG. It is configured.

  Since the intake section 10 uses seawater as cooling water in thermal power plants and nuclear power plants, the intake portion 10 is provided at a position lower than the sea level S in the vicinity where these power plants are constructed. It is a facility installed on the sea bottom U with concrete, and is provided with a water intake 11 which is a hole into which seawater is taken in and a lid 12 for sealing the water intake 10. The water intake 11 is an inlet for taking seawater from the side of the water intake unit 10 and is a place where the string 3 and the hose 4 are inserted.

  The intake channel tunnel 20 is a channel constructed in the ground below the sea bottom U in order to send the seawater taken from the intake port 11 to a thermal power plant or a nuclear power plant, and is covered with a concrete wall surface, for example. ing. The intake channel tunnel 20 is provided with a tunnel portion 21, a branch point 22, a vertical hole 23, and a vertical hole inlet (discharge port) 24.

  The tunnel portion 21 is a tunnel for passing seawater taken from the water intake 11. The branch point 22 is a branch port through which the tunnel portion 21 and the vertical hole 23 branch. The vertical hole 23 is provided on the land R between the thermal power plant or the nuclear power plant and the coast as a heavy machinery carry-in port for the construction of the intake tunnel 20 so that workers can enter during inspection after construction. The intake channel tunnel 20 is constructed by extending from the vertical hole 23, and is also used as a hole for lifting the string 3 and the hose 4 and discharging mud. . The vertical hole inlet 24 is an inlet for an operator to enter the vertical hole 23, and is also used as an outlet for floating mud. A drainage pump 2 is installed in the vicinity of the vertical hole inlet 24.

  As shown in FIG. 2, the floating mud X floats or settles inside the tunnel portion 21. Normally, water intake channels in thermal power plants and nuclear power plants flow when the power generation facilities are in operation, so that mud mud that can affect the intake of water from the water channel X does not float or settle. However, for example, when the nuclear power plant has been stopped for a long period of time as in the present situation, there is a possibility that the floating mud X is floating or settled inside the tunnel portion 21, and at the time of re-operation. There is a risk of hindering intake of seawater for cooling. The present invention is for dealing with such a case, for example.

  The intake channel 30 is a water channel that extends from the intake channel tunnel 20 and is provided in the facility of the thermal power plant or the nuclear power plant, and for sending seawater flowing from the intake channel tunnel 20. Covered.

  The intake tank 40 is a water tank for temporarily storing seawater taken from the intake channel 30 for use in cooling a power generation facility of a thermal power plant or a nuclear power plant. For example, the intake tank 40 is covered with a concrete wall surface. Yes. The intake tank 40 is provided with a water tank part 41 for storing seawater, an intake tank inlet 42, and a screen 43. The water tank part 41 is a main body part of the water intake tank 40 for storing seawater. The intake tank inlet 42 is an inlet for taking seawater into the intake tank 40, and is a place where a corner drop for removing water from the intake tank 40 at the time of inspection is installed. The screen 43 is for removing foreign substances when water is taken into the water intake tank 40. The water tank 41 of the water intake tank 40 is provided with a water intake pump 44, seawater is sent to a water intake pipe 45 connected to the pump 44, and the sent seawater is used for cooling.

  A floating mud discharge method using such a floating mud discharge device 1 will be described below.

  First, the hose conduction process shown in FIG. 1 will be described. The tip of the string 3 opposite to the connection side with the hose 4 is inserted into the water intake port 11 shown in FIG. The string 3 moves in the direction of arrow A according to the flow of water in the tunnel portion 21 and reaches the branch point 22. The tip of the string 3 that has reached the branch point 22 is pulled up from the vertical hole inlet 24 via the vertical hole 23. By pulling the pulled up string 3, the hose 4 connected to the string 3 is inserted into the water intake 11 following the string 3 at the water intake 11. The hose 4 also moves from the tunnel portion 21 to the branch point 22 following the string 3 and enters the state shown in FIG. Thereafter, the hose 4 is pulled up from the vertical hole inlet 24 via the vertical hole 23. At this time, the tip of the hose 4 on the side opposite to the connection side with the string 3 is inserted into the water intake 11 and submerged in the tunnel portion 21.

  3 is a view showing the umbrella-like member 31 attached to the string 3 of FIG. 1, an enlarged view (a) showing a state in which the umbrella-like member 31 moves in the tunnel portion 21 of FIG. 1, and the umbrella-like member. It is an enlarged view (b) which shows the state which 31 is pulled up to the vertical hole 23 from the branch location 22 of FIG. An umbrella-shaped member 31 for receiving the flow of water in the tunnel portion 21 is connected to the tip of the string 3 in FIGS. 3 (a) and 3 (b). The umbrella-shaped member 31 is connected to a vinyl sheet in which, for example, the tip portion of the string 3 branches into a plurality (for example, six), and each string is expanded into a hemisphere. When the umbrella-shaped member 31 is inserted into the water intake 11, the tunnel portion 21 receives and spreads the water flow, and moves in the tunnel portion 21 in the direction of arrow C1 along the water flow. The state shown in a) is obtained.

  When the umbrella-shaped member 31 moving in the tunnel portion 21 reaches the branch point 22, the gripping tool L inserted from the vertical hole inlet 24 is extended from the vertical hole 23 to the branch point 22, and FIG. It will be in the state shown in The gripping tool L is a tool that is provided in a rod shape and grips the string 3. In order to grip the string 3 by clamping the fixed part L1 bent at a right angle to the tip thereof and the fixing part L1. A moving part L2 is provided so as to be able to move the rod-like part back and forth. When the fixing part L1 hooks the string 3 and the moving part L2 moves in the distal direction of the gripping tool L shown in the direction of the arrow C2, the string 3 is sandwiched and held between the fixing part L1 and the moving part L2. With this gripping tool L, the string 3 is gripped and pulled up from the vertical hole 23 to the vertical hole inlet 24. Thereby, the string 3 and the hose 4 are conducted from the water intake 11 to the vertical hole inlet 24.

  Next, the floating mud discharge process shown in FIG. 2 will be described. The tip of the hose 4 pulled up from the vertical hole inlet 24 is connected to the drainage pump 2, and the drainage pump 2 is driven. When the drainage pump 2 is driven, seawater around the tip of the hose 4 on the side of the tunnel portion 21 is sucked by the suction force of the drainage pump 2, and the floating mud X floating or sedimenting in the tunnel portion 21 is accompanying this. It is sucked by the hose 4. At this time, when the hose 4 on the vertical hole inlet 24 side is pulled, the tip of the hose 4 on the tunnel part 21 side moves in the direction of arrow B shown in FIG. Thereby, the floating mud X floating in the wide range of the tunnel part 21 can be sucked.

  In addition, when discharging the mud X in the intake tank 40 side, the intake channel 30, and the intake tank 40 from the vertical hole 23 in the tunnel part 21, the string 3 shown in FIG. . In this case, the string 3 and the hose 4 are inserted from the water port 11, but may be inserted from the vertical hole 24.

  Thus, according to this floating mud discharging apparatus 1 and the floating mud discharging method using the same, the string 3 and the hose 4 are electrically connected from the water intake 11 to the vertical hole inlet 24, and the tip of the hose 4 is a drainage pump. 2 and then the drainage pump 2 is driven to suck the seawater around the tip of the hose 4 on the side of the tunnel portion 21, and the floating mud X floating or settled in the tunnel portion 21 is Sucked. Thereby, the floating mud X in the tunnel part 21 is discharged | emitted from the vertical hole inlet 24 safely. Further, even when the tunnel portion 21 is a small-diameter water channel that cannot be entered by a person, the floating mud X can be collected. Furthermore, since the tip of the hose 4 on the tunnel portion 21 side moves in the direction of arrow B, the floating mud X floating in a wide range of the tunnel portion 21 can be sucked.

  Moreover, since the umbrella-shaped member 31 is connected to the tip of the string 3, the umbrella-shaped member 31 moves along the flow of water in the tunnel portion 21, so that the string 3 can reliably reach the branch point 22. Is possible.

  Next, a modified example of the floating mud discharge method using the floating mud discharge device 1 according to the embodiment of the present invention will be described. FIG. 4 is an enlarged view showing a fan-like member 46 attached to the water inlet side tip of the hose 4 according to a modification of the embodiment of the present invention. The floating mud discharge device according to this modification has the same configuration as the floating mud discharge device 1 according to the above-described embodiment, except that a fan-shaped member 46 is attached to the water inlet side tip of the hose 4. It differs from the mud discharge apparatus 1 which concerns on the above-mentioned embodiment. The fan-shaped member 46 is formed of, for example, a plastic resin or the like, and is formed so as to be stored at the tip of the hose 4 on the tunnel portion 21 side when the hose 4 is not used. When the hose 4 moves in the direction of the arrow D, the fan-shaped member 46 is formed so as to open in the directions of the arrow E1 and the arrow E2 and expand in a fan shape. Other configurations are the same as those in the first embodiment.

  Thus, according to the floating mud discharge apparatus 1 to which the fan-shaped member 46 is attached and the floating mud discharge method using the same, the floating mud X floating or settled in the tunnel portion 21 is indicated by the arrow F1 and the arrow. Since each can be sucked in the F2 direction, the floating mud X can be sucked and discharged over a wide range in the width direction.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above-described embodiment, the hose 4 is configured to move in the direction of the vertical hole inlet 24, but may be configured to move in the direction of the water intake 11. In this case, the drain pump 2 may be provided in the vicinity of the water inlet 11. Thereby, it becomes possible to suck and discharge the floating mud X floating or settled on the intake channel 30 side of the tunnel portion 21.

  Further, although the gripping tool L is gripped by the fixed portion L1 and the moving portion L2, a hook-like member may be provided at the tip and the string 3 may be hooked by the hook.

1 Floating mud discharge device 2 Drainage pump 3 String (linear body)
4 Hose 10 Intake channel 11 Intake port 12 Lid part 20 Intake channel tunnel (water channel)
21 Tunnel part 22 Branching point 23 Vertical hole 24 Vertical hole entrance (discharge port)
30 Intake Channel 31 Umbrella-shaped Member 40 Intake Tank 41 Water Tank Part 42 Intake Tank Inlet 43 Screen 44 Pump 45 Intake Pipe 46 Fan-shaped Member X Floating Mud

Claims (5)

A floating mud discharge method for discharging floating mud floating or settled inside a water channel for taking water from a water intake through the discharge port in the water channel,
A tubular body connected to the linear body by inserting a linear body from the intake port, guiding the linear body to the discharge port according to the flow of water, and pulling out the linear body from the discharge port Hose conduction step of passing the hose from the intake port to the discharge port,
A drainage pump is attached to the outlet side tip of the hose passed through the outlet, the drainage side tip of the hose is submerged in the water channel, the drainage pump is driven, and the floating mud is sucked together with the water, A floating mud discharge step of moving the water intake side tip of the hose to the discharge side;
A method for discharging mud mud characterized by comprising: The linear body is attached with an umbrella-like member that is expanded into a substantially hemispherical shape by the flow of water.
The sludge discharging method according to claim 1, wherein: A fan-shaped member having an open side is attached to the water inlet side tip of the hose,
The floating mud discharge method according to any one of claims 1 and 2. A floating mud discharge device that discharges floating mud floating or settled inside a water channel for taking water from a water intake port from the discharge port in the water channel,
A linear body inserted from the water intake and conducted to the outlet according to the flow of the water;
A cylindrical hose connected to the linear body, inserted from the water intake according to the linear body and conducted to the outlet;
A drainage pump attached to the discharge port side tip of the hose and sucking the floating mud together with the water from the water intake side tip of the hose submerged in the water channel,
The linear body is attached with an umbrella-shaped member that is expanded into a substantially hemispherical shape by the flow of water,
The hose sucks the floating mud together with the water, and the water intake side tip is moved to the discharge port side.
A floating mud discharge device. A fan-shaped member having an open side is attached to the water inlet side tip of the hose,
The floating mud discharger according to claim 4.

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