JP6296603B2 - Movable breakwater and movable breakwater facility - Google Patents

Description

  The present invention relates to a movable breakwater and a movable breakwater facility that protrude from the bottom of the water onto the water surface as necessary.

  A movable breakwater has been proposed to reduce the effects of waves by installing a wave breaker that can be raised and lowered at the bottom of the water and causing the wave breaker to protrude above the water surface in the event of a tsunami or during stormy weather. . For example, Patent Document 1 discloses a plurality of outer cylinders that penetrate through concrete provided on the bottom surface of the water and are vertically inserted and fixed in the bottom of the ground, and arranged in a dense state with the upper end surface opened on the surface of the foundation concrete. A tube, a floating tube that is inserted into the outer tube so as to be movable up and down, has a lower end surface opened, and has an upper end surface blocked, and an air supply device having an air supply tube for supplying gas into each floating tube A movable breakwater is described.

JP 2004-116131 A

  In the movable breakwater as described above, the air supply pipe of the air supply device is arranged under the water bottom together with the outer cylinder pipe buried under the water bottom to supply gas from the bottom of the levitation pipe, and the tip is the outer cylinder pipe. Is inserted into the outer tube from the outside. In such an air supply pipe, the installation work as described above is not easy, and the tip inserted into the outer cylinder pipe is separated from the outer cylinder pipe by the air pressure when the floating pipe is projected to the surface of the water. There was a risk of detachment.

  This invention solves the subject mentioned above, and it aims at providing the movable breakwater and movable breakwater facility which can maintain the arrangement | positioning state of an air pipe.

  In order to achieve the above-described object, the movable breakwater of the present invention includes an outer tube formed in a vertically long shape, having an opening on the bottom of the water and inserted and fixed in the bottom of the water, and the outer tube A levitation tube that is inserted into the tube and is arranged to be movable up and down in the longitudinal direction of the outer tube, and is provided so as to be able to rise by generating buoyancy by the gas supplied to the inside of the tube, and the levitation tube In the movable breakwater provided with a gas supply pipe for supplying gas to the inside of the outer tube, the outer tube is formed on the outer side thereof continuously from the upper end in the vertical direction and forms a space where the upper part is open and the bottom part is closed. An opening hole that leads from the space of the guide portion to the inside thereof at the position of the closed bottom portion of the guide portion, and the air supply pipe is inserted from the upper opening of the guide portion, Reaches the bottom and is inserted into the opening hole, and the tip Wherein characterized in that it has a securing portion secured to the edge of the opening hole.

  According to this movable breakwater, the guide portion can move the distal end portion of the air supply pipe to the position where it is inserted into the opening hole along the outside of the outer tube that is inserted and fixed in the water bottom ground. Moreover, the front end portion inserted into the opening hole can be locked by the locking portion, and the front end portion can be prevented from coming off from the opening hole. As a result, the arrangement state of the air pipe can be maintained.

  In the movable breakwater according to the present invention, the air pipe has release means for releasing the locking of the locking portion with respect to the opening.

  According to this movable breakwater, it is possible to easily remove the tip of the air supply tube from the opening hole when the air supply tube is replaced by releasing the lock of the lock portion with respect to the opening by the release means. it can.

  Further, the movable breakwater of the present invention is formed in a vertically long shape, and has an outer cylindrical tube that is inserted and fixed in the water bottom ground with an opening on the water bottom side, and is inserted into the outer cylindrical tube, The levitation tube is arranged so as to be movable up and down in the longitudinal direction of the outer tube, and buoyancy is generated by the gas supplied to the inside of the outer tube, and the gas is supplied to the inside of the levitation tube. In the movable breakwater provided with an air supply pipe, the outer tube is closed on the outer side of the guide part that forms a space in which the upper part opens continuously from the upper end to the upper part and the bottom part is closed. An opening hole that leads from the space of the guide portion to the inside at the position of the bottom portion, and the air supply pipe is inserted from the opening of the upper portion of the guide portion, and the distal end portion reaches the bottom portion and is inserted into the opening hole. Inside the guide portion and the feed Tube and having a filling member for restricting the movement of the air tube is injected into the portion inserted into the opening.

  According to this movable breakwater, the guide portion can move the distal end portion of the air supply pipe to the position where it is inserted into the opening hole along the outside of the outer tube that is inserted and fixed in the water bottom ground. In addition, the tip of the opening hole can be prevented from coming off from the opening hole by restricting the movement of the air feeding tube inserted into the opening hole by the filling member. As a result, the arrangement state of the air pipe can be maintained.

  In the movable breakwater according to the present invention, the movable breakwater has a fixing portion that fixes the air supply pipe to the outer tube side at the position of the opening above the guide portion.

  According to this movable breakwater, the tip is prevented from coming off from the opening hole by the locking part or the filling member, and the air supply pipe is fixed to the outer tube side at the position of the opening above the guide part by the fixing part. As a result, the effect of maintaining the arrangement state of the air pipe can be obtained more remarkably.

  In order to achieve the above object, the movable breakwater facility of the present invention is characterized in that a plurality of the above movable breakwaters are arranged on the bottom of the water.

  According to this movable breakwater facility, the arrangement state of the air pipe can be maintained, and the movable breakwater can be moved without any trouble.

  According to the present invention, the arrangement state of the air pipe can be maintained.

FIG. 1 is a plan view of a movable breakwater facility according to an embodiment of the present invention. 2 is a partial cross-sectional view taken along arrow AA in FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 4 is an overall configuration diagram of a movable breakwater facility including a movable breakwater according to an embodiment of the present invention. Drawing 5 is a mimetic diagram showing signs that a levitation pipe of a movable breakwater concerning the embodiment of the present invention floats up. Drawing 6 is a mimetic diagram showing signs that a floating pipe of a movable breakwater concerning the embodiment of the present invention floats up. Drawing 7 is a mimetic diagram showing signs that a floating pipe of a movable breakwater concerning the embodiment of the present invention floats up. 8 is an enlarged cross-sectional view taken along the line BB in FIG. FIG. 9 is a view taken along the line CC in FIG. FIG. 10 is an enlarged longitudinal sectional view of the movable breakwater according to the embodiment of the present invention. FIG. 11 is an enlarged plan view of a movable breakwater according to an embodiment of the present invention. FIG. 12 is an enlarged cross-sectional view of an air pipe in a movable breakwater according to an embodiment of the present invention. FIG. 13 is an enlarged vertical cross-sectional view showing a procedure for attaching the air pipe in the movable breakwater according to the embodiment of the present invention. FIG. 14 is an enlarged vertical cross-sectional view showing a procedure for attaching the air pipe in the movable breakwater according to the embodiment of the present invention. FIG. 15 is an enlarged longitudinal sectional view showing another example of the fixing structure of the air pipe in the movable breakwater according to the embodiment of the present invention. FIG. 16 is an enlarged vertical cross-sectional view showing an additional example of the air pipe fixing structure in the movable breakwater according to the embodiment of the present invention.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  The movable breakwater according to this embodiment is installed on the bottom of the sea, riverbed, etc., for example, when a tsunami or storm surge occurs, it floats from the bottom of the water to the surface of the water and obstructs the passage of the tsunami or storm surge. And protect harbor facilities.

  FIG. 1 is a plan view of a movable wave-proof facility according to the present embodiment. 2 is a partial cross-sectional view taken along arrow AA in FIG. This FIG. 2 has shown the state which the movable breakwater which concerns on this embodiment surfaced. 3 is a cross-sectional view taken along line BB in FIG. FIG. 3 shows a state where the movable breakwater according to the present embodiment is at the bottom of the water, that is, a state before rising. FIG. 4 is an overall configuration diagram of a movable breakwater facility including a movable breakwater according to the present embodiment. 5-7 is a schematic diagram which shows a mode that the floating pipe of the movable breakwater which concerns on this embodiment floats.

  As shown in FIGS. 1 to 3, the movable breakwater facility 1 includes a plurality of movable breakwaters 10 and a monitoring / control system facility 100. In the present embodiment, the plurality of movable breakwaters 10 are arranged in a row between the quays K1 and K2, and partition the inside of the harbor (inside the harbor BI) and the outside of the harbor (outside the harbor BO). The movable breakwater 10 has the levitation tube 12 disposed inside the outer cylindrical tube 11 and levitates (lifts) the levitation tube 12 by supplying gas (air in this embodiment) to the inside of the levitation tube 12. Structure. The movable breakwater 10 can be installed not only between the quays K1 and K2, but also between breakwaters (including fixed, pile, and floating bodies). Moreover, the movable breakwater 10 is not limited to between the quays K1 and K2, and a plurality of movable breakwaters 10 may be arranged.

  Each movable breakwater 10 is supplied with air from each air pipe 3. The plurality of air pipes 3 are combined into an air pipe duct 2 disposed on the bottom of the water and connected to a gas supply device (described later) provided in the monitoring / control system facility 100 on one quay K2. In the event of an emergency, for example, when a tsunami or storm surge occurs, gas is supplied from the gas supply device into the levitation pipe 12 of each movable breakwater 10 through the air supply pipe 3, and the levitation pipe 12 is And a part of the levitation tube 12 protrudes from the water surface.

  As shown in FIGS. 2 and 3, the movable breakwater 10 includes an outer tube 11 (a fixed portion of the movable breakwater 10) and a floating tube 12 (a movable portion of the movable breakwater 10). The outer tube 11 and the levitation tube 12 are cylindrical members and are formed of steel tubes. Both the outer tube 11 and the levitation tube 12 are subjected to anticorrosion treatment. The outer tube 11 and the levitation tube 12 are not limited to a cylindrical shape. The outer tube 11 and the levitation tube 12 are not limited to steel pipes, and may be made of, for example, carbon fiber, or one of the outer tube 11 or the levitation tube 12 is made of steel and the other is made of carbon fiber. The structure may be made of different materials.

  The outer tube 11 is formed in a vertically long shape with an upper end opened, and is driven into the water bottom ground E. The outer tube 11 has a lower layer portion inserted and fixed in the water bottom ground E, and a rubble 5 is laid around the upper layer portion. The upper surface of the rubble 5 becomes the water bottom GL. The outer tube 11 has an opening 11a at the upper end on the water bottom side. Further, the outer tube 11 is inserted with the air supply tube 3 from the bottom portion inserted into the water bottom ground E, and the gas outlet 3a is disposed inside.

  The levitation tube 12 is inserted into the outer tube 11 from the opening 11 a of the outer tube 11 along the longitudinal direction (tube axis direction) of the outer tube 11, with respect to the longitudinal direction of the outer tube 11. And can be moved up and down. The levitation tube 12 is configured to generate buoyancy by the gas supplied into the buoyancy tube 12 and to float from the outer tube 11. Specifically, as shown in FIG. 3, the levitation tube 12 is provided with a plurality of partition members (plate-like members in the present embodiment) 15 and 16 (hereinafter, the partition member 15 is divided into first partitions). It is called member 15 and partition member 16 is called second partition member 16). The first partition member 15 is disposed above the levitation tube 12, and the second partition member 16 is disposed below the first partition member 15. In addition, the upper end of the levitation tube 12 is closed by a lid 17. The levitation tube 12 is partitioned into a plurality of rooms by the first partition member 15, the second partition member 16, and the lid 17.

  The space 13 partitioned by the first partition member 15, the second partition member 16, and the side wall of the levitation tube 12 accumulates the gas supplied from the air supply tube 3 to the inside of the levitation tube 12 and generates buoyancy in the levitation tube 12. It is a space to make it. Hereinafter, the space 13 is referred to as an air chamber 13. The space CR partitioned by the lid 17, the first partition member 15, and the side wall of the levitation tube 12 monitors the state of the movable breakwater 10 or levitates the levitation tube 12 when no gas is supplied from the air supply tube 3. A control device 20 is arranged for causing the floated pipe 12 to move down and to return the floated pipe 12 to the inside of the outer tube 11. Hereinafter, the space CR is referred to as a machine room CR. The second partition member 16 includes a hole 16a. The hole 16 a guides the gas supplied from the air supply pipe 3 to the inside of the floating pipe 12 to the air chamber 13.

  Buoyancy generating means 14 is attached to the inner surface of the side wall of the levitation tube 12. The buoyancy generating means 14 is, for example, a resin having bubbles, for example, polystyrene foam. The buoyancy generating means 14 may have a structure in which a simple space is filled with a gas such as air or nitrogen. The movable breakwater 10 supplies gas to the air chamber 13 of the levitation tube 12 in the event of an emergency, generates buoyancy in the levitation tube 12 by this gas, and causes the levitation tube 12 to float from the outer tube 11. By attaching the buoyancy generating means 14 to the levitation tube 12, when the levitation tube 12 is levitated, the amount of buoyancy required to levitate the levitation tube 12 is insufficient by the buoyancy generated by the buoyancy generation means 14. It may be covered by gas. As a result, the amount of gas supplied to the inside of the levitation tube 12 can be reduced, so that the levitation tube 12 can be quickly levitated.

  The levitation tube 12 has an opening 12a at its lower end. And the gas outlet 3a of the air feeding pipe 3 is arrange | positioned under the opening part 12a. Note that the gas inlet of the air supply pipe 3 is connected to the gas supply device described above.

  As shown in FIG. 4, the gas supply device includes a gas bottle 104, an on-off valve 110 provided between the gas bottle 104 and the air supply pipe 3, and a compressor 102 driven by an electric motor 103. The These are provided in the monitoring / control system facility 100. A gas inlet of the air supply pipe 3 is connected to an on-off valve 110 constituting a gas supply device. The gas bottle 104 is filled with a high-pressure (about 20 MPa) gas by the compressor 102. When the levitation tube 12 is levitated, the on-off valve 110 is opened, and the gas in the gas bottle 104 is supplied into the levitation tube 12 through the air supply tube 3. The gas bottles 104 are provided for the respective movable breakwaters 10. In this embodiment, two gas bottles 104 are prepared for one movable breakwater 10. Note that the air supply pipes 3 may be individually provided for the respective gas bottles 104, and the two air supply pipes 3 may be disposed below the opening 12 a of the floating pipe 12.

  The floating pipe 12 of one movable breakwater 10 can be levitated by one gas bottle 104, but by preparing two gas bottles 104 for one movable breakwater 10, When some trouble occurs in the gas supply system, the other can be used as a backup, so that the levitation tube 12 can be lifted more reliably. Further, by supplying gas from the two gas bottles 104 to one movable breakwater 10, the levitation tube 12 can be floated more quickly than when the gas bottle 104 is used alone. As an example in which the floating pipes 12 of the three movable breakwaters 10 are levitated by one gas bottle 104, only the floating pipe 12 of the central movable breakwater 10 is fed by the air supply pipe 3. In the movable breakwater 10 on both sides, the volume of the buoyancy generating means 14 is made larger than that in the central movable breakwater 10 so as to be almost neutral buoyancy, and the floating pipe 12 of the movable breakwater 10 on both sides is used as the central floating pipe. It is preferable to use a structure that floats so as to be lifted by 12. By comprising in this way, it becomes possible to reduce the number of the air supply pipes 3. Further, with the same configuration, it is also possible to configure the floating pipes 12 of the five movable breakwaters 10 to be levitated by one gas bottle 104. Thus, you may comprise so that the floating pipe | tube 12 of the several movable breakwater 10 may be levitated by the one gas bottle 104. FIG.

  The motor 103 and the compressor 102 are controlled by the monitoring / control device 101. For example, the monitoring / control device 101 acquires the pressure of the gas filled in the gas bottle 104 by the gas pressure sensor 111, and drives the electric motor 103 to operate the compressor 102 when the pressure is lower than the specified pressure. The gas is filled from the compressor 102 into the gas bottle 104 until a predetermined pressure is reached. The monitoring / control device 101 acquires the pressure in the air supply pipe 3 from an air supply pipe pressure detection sensor (air supply pipe pressure detection means) 105 that detects the pressure in the air supply pipe 3 provided in the air supply pipe 3. Then, it is monitored whether or not there is a leaking part in the air pipe 3.

  Further, the monitoring / control device 101 communicates with the control device 20 in the machine room CR of the movable breakwater 10 to monitor the state of the movable breakwater 10 and to control the movement of the floating pipe 12. For example, when returning the levitated pipe 12 to the outer cylinder pipe 11, the monitoring / control device 101 is provided in the middle of the air supply pipe connecting the air chamber 13 and the outside of the air chamber 13 via the control device 20. Opened exhaust valve 18 is opened. As a result, the gas in the air chamber 13 is released to the outside of the air chamber 13, and the gas in the air chamber 13 is replaced with water, so that the buoyancy of the levitation tube 12 is lowered. Fits in the outer tube 11.

  In the event of an emergency, for example, when the monitoring / control device 101 receives an alarm such as a tsunami or a storm surge, the monitoring / control device 101 opens the on-off valve 110 and, as shown in FIG. The gas in the bottle 104 is supplied into the floating tube 12. The gas supplied from the air supply pipe 3 into the levitation pipe 12 enters the air chamber 13 through the hole 16a of the second partition member 16, as shown in FIG. When the sum of the buoyancy generated by the gas inside the air chamber 13 and the buoyancy generated by the buoyancy generating means 14 exceeds the weight of the entire buoyancy tube 12 in water, the levitation tube 12 Ascending from the outer tube 11 toward WL. Then, as shown in FIG. 7, a part of the levitation tube 12 protrudes on the water surface WL. At this time, excess gas in the air chamber 13 is exhausted from the hole D1 provided in the air chamber 13. Further, the water in the machine room CR is drained from a hole D2 provided in the machine room CR. In this way, in the event of an emergency, as shown in FIG. 2, a plurality of levitation pipes 12 project from the water surface WL in a row to exhibit the function of a breakwater, and protect harbor facilities and the like from tsunamis and storm surges.

  8 is an enlarged cross-sectional view taken along the line BB in FIG. FIG. 8 shows a state where the movable breakwater according to the present embodiment is at the bottom of the water, that is, a state before rising. FIG. 9 is a view taken along the line CC in FIG. In the movable breakwater 10, a charging device and a storage battery are incorporated in a floating pipe 12. The charging device and the storage battery are not shown in the figure, but are provided in the control device 20 described above. As shown in FIGS. 8 and 9, the movable breakwater 10 includes a power receiving unit 21 and a power transmitting unit 22.

  The power receiving unit 21 is provided in the levitation tube 12 and supplies power to the storage battery or performs transmission / reception in underwater communication. The power transmitter 22 is for transmitting power to the power receiver 21 when the levitation tube 12 is lowered, and for transmitting and receiving in underwater communication. The power receiving unit 21 and the power transmitting unit 22 face each other and transmit power and communication signals in a non-contact manner (for example, with a gap of about 30 mm exceeding 0 mm) using electromagnetic induction.

  The power transmission unit 22 is electrically connected to a power source (not shown) provided in the on-shore monitoring / control system facility 100. The power source transmits the alternating current as it is, or converts the direct current power source into alternating current by an inverter and sends it to the power transmission unit 22. The power transmission unit 22 includes a power supply side coil and a power supply circuit, and the power reception unit 21 includes a power reception side coil and a power reception circuit. That is, an induced electromotive force is generated in the power receiving side coil of the power receiving unit 21 due to a change in the magnetic field generated by an alternating current flowing in the power feeding side coil of the power transmitting unit 22, and the power transmitted from the power source without contact is controlled. Transmit to 20 charging devices. As described above, the electric power transmission unit 22 converts electric energy into magnetic energy and transmits the electric energy, and the electric power reception unit 21 converts the magnetic energy into electric energy and transmits electric power in a non-contact manner. In addition, a charging device converts the electric power transmitted from the electric power receiving part 21 by alternating current into direct current, and charges a storage battery.

  The power transmission unit 22 is provided in the outer cylindrical tube 11 at a location where the side wall of the outer cylindrical tube 11 is cut out in a range embedded with the rubble 5 at a predetermined depth H1 from the water bottom GL. Specifically, the power transmission unit 22 is fixed to the outer cylinder pipe 11 via a bracket 22a reinforced with a rib or the like at a location where the side wall of the outer cylinder pipe 11 is cut out. For this reason, the electric power transmission part 22 will be arrange | positioned below the water bottom GL.

  The power receiving unit 21 is configured such that the side wall of the levitation tube 12 is cut out in a range below the upper end of the levitation tube 12 at the lowering position of the levitation tube 12 (the position where the upper end of the levitation tube 12 coincides with the water bottom surface GL due to the lowering). The power transmission unit 22 is provided so as to be opposed to the power transmission unit 22. Specifically, the power receiving unit 21 is fixed to the levitation tube 12 via a bracket 21a reinforced with a rib or the like at a location where the side wall of the levitation tube 12 is cut away. For this reason, the power receiver 21 is disposed below the water bottom GL. The power receiving unit 21 is covered at the top by a lid 17 provided at the upper end of the levitation tube 12.

  9 is a rotation prevention member that is provided on the outer wall of the levitation tube 12 along the longitudinal (water depth) direction and prevents the levitation tube 12 from rotating with respect to the outer tube 11. is there. The rotation preventing member 23 determines the positions where the power receiving unit 21 and the power transmitting unit 22 face each other.

  Hereinafter, the detail of the principal part of the movable breakwater 10 provided in the movable breakwater facility 1 mentioned above is demonstrated with reference to figures. FIG. 10 is an enlarged longitudinal sectional view of the movable breakwater according to this embodiment, and FIG. 11 is an enlarged plan view of the movable breakwater according to this embodiment. FIGS. 10 and 11 show a state where the movable breakwater according to the present embodiment is at the bottom of the water, that is, a state before ascending. FIG. 12 is an enlarged cross-sectional view of an air pipe in the movable breakwater according to the present embodiment.

  As shown in FIGS. 10 and 11, in the air supply pipe 3, the distal end portion 3 </ b> A is inserted from the bottom of the outer cylindrical pipe 11 inserted in the water bottom ground E, and the gas outlet 3 a is arranged inside. The outer tube 11 in which the air supply tube 3 is arranged in this way has a guide portion 11A on the outer side thereof that forms a space in which the upper portion 11Aa is continuously opened in the vertical direction from the upper end and the bottom portion 11Ab is closed. Yes. Although the guide portion 11A is shown to form a triangular space in FIG. 11, the shape of the space is not limited. The guide portion 11 </ b> A is closed by being inclined downward as the bottom portion 11 </ b> Ab approaches the outer peripheral surface of the outer tube 11. Further, the outer tube 11 has an opening hole 11B that communicates from the space of the guide portion 11A to the inside thereof at the closed bottom portion 11Ab of the guide portion 11A. The opening hole 11B is provided immediately above the position where the bottom portion 11Ab of the guide portion 11A abuts on the outer peripheral surface of the outer cylindrical tube 11, and before the levitation tube 12 is levitated, from the lower end opening portion 12a. Is also provided at a lower position.

  As shown in FIG. 12, the air supply tube 3 is provided with a tip 3A at the tip of the air supply main body 3B. The air supply main body 3B is made of a fluororesin so as to have excellent chemical resistance, water resistance, heat resistance and flexibility, and has a double structure composed of an inner tube 3Ba and an outer tube 3Bb. ing. The tip 3A is formed of a stainless alloy having excellent chemical resistance, corrosion resistance, and heat resistance. 3 A of front-end | tip parts are formed in the external shape which can be inserted in the opening hole 11B of the outer cylinder pipe 11, and have the taper surface which an external shape becomes thin toward the front-end | tip. The distal end portion 3A is connected to the inner tube 3Ba and the outer tube 3Bb of the air supply main body portion 3B, has a through hole 3Aa communicating with and passing through the inner tube 3Ba, and is attached to the outer tube 3Bb so as to close the outer tube 3Bb. It has coupling | bond part 3Ab couple | bonded. 3 A of front-end | tip parts serve as the gas outlet 3a in the opening part of the front-end | tip of through-hole 3Aa.

  Further, the distal end portion 3 </ b> A has a locking portion 3 </ b> C that is locked to the opening hole 11 </ b> B of the outer tube 11. The locking portion 3C has a locking claw 3Ca, an elastic member 3Cb, and a release means 3Cc. The locking claw 3Ca is disposed in a recessed portion 3Ac formed on the outer peripheral surface of the distal end portion 3A, and a proximal end is provided outside the recessed portion 3Ac by a swing shaft 3Caa provided at the distal end portion facing the distal end side of the distal end portion 3A. It is provided so as to be able to swing between a form in which the part protrudes and a form in which the entire part is housed in the recess 3Ac. The locking claw 3Ca protrudes outward from the outer peripheral surface of the distal end portion 3A in a form in which the base end portion protrudes to the outside of the concave portion 3Ac, and from the outer peripheral surface of the distal end portion 3A in a form accommodated entirely in the concave portion 3Ac. Immerse inside too. The locking claw 3Ca may be formed of a stainless alloy excellent in chemical resistance, corrosion resistance, and heat resistance, similarly to the tip portion 3A, or may be formed of a synthetic resin material. The locking claw 3Ca protrudes outward from the outer peripheral surface of the distal end portion 3A, thereby locking the edge of the opening hole 11B inside the outer tube 11 and inserting the distal end portion 3A into the opening hole 11B. Is prevented from coming out from the inside of the outer tube 11 to the guide portion 11A side. On the other hand, the locking claw 3Ca allows the insertion of the distal end portion 3A into the opening hole 11B by immersing inside the outer peripheral surface of the distal end portion 3A.

  The elastic member 3Cb urges the locking claw 3Ca to protrude outward from the outer peripheral surface of the tip portion 3A, and is made of a spring material. Examples of the spring material include a compression coil spring and a leaf spring, which may be formed of a stainless steel alloy having excellent chemical resistance, corrosion resistance, and heat resistance similarly to the tip portion 3A and the locking claw 3Ca. Similarly, it may be formed of a synthetic resin material. That is, the elastic member 3Cb urges the locking claw 3Ca so as to protrude outward from the outer peripheral surface of the distal end portion 3A, so that the locking claw 3Ca is engaged with the edge of the opening hole 11B of the outer tube 11. It stops, and the form which keeps 3 A of front-end | tip parts from the opening hole 11B is maintained. Note that the locking claw 3Ca is provided so as to be swingable by a swing shaft 3Caa provided at a tip portion facing the tip side of the tip portion 3A. For this reason, when the distal end portion 3A is inserted into the opening hole 11B so as to be arranged in the outer tube 11 from the guide portion 11A side, the inner peripheral surface of the opening hole 11B resists the biasing force of the elastic member 3Cb. Since the entire locking claw 3Ca is housed inside the recess 3Ac and immerses inside the outer peripheral surface of the distal end portion 3A, the locking claw 3Ca is inserted into the opening hole 11B. There is no inhibition.

  The release means 3Cc moves the locking claw 3Ca into the inner side of the outer peripheral surface of the distal end portion 3A against the urging force of the elastic member 3Cb. In the present embodiment, the releasing means 3Cc moves toward the proximal end side of the locking claw 3Ca. It is configured as a cord-like member such as a connected wire or rope. The releasing means 3Cc as a cord-like member is disposed between the inner tube 3Ba and the outer tube 3Bb of the air supply main body 3B from the proximal end side of the distal end portion 3A, and extends to the base end of the air supply main body 3B. ing. That is, by pulling the release means 3Cc as a cord-shaped member toward the proximal end of the air supply main body 3B, the locking claw 3Ca is entirely housed in the recess 3Ac, and the outer peripheral surface of the distal end 3A Therefore, the locking claw 3Ca is unlocked and insertion of the tip 3A into the opening hole 11B is allowed. As shown in FIG. 12, the release means 3Cc may be provided at a plurality of locations on the distal end portion 3A, or may be provided at a single location. When provided in a plurality of places, a plurality of cord-like members may be combined into one between the inner tube 3Ba and the outer tube 3Bb.

  The air supply pipe 3 is provided with a connection flange 3D at the base end of the air supply main body 3B. The connection flange 3D is for connecting the air supply pipes 3 to each other when the air supply pipes 3 are divided on the way. For example, as shown in FIG. 10, the air pipe 3 is divided in the middle of the guide portion 11 </ b> A or a portion that needs to be curved as a flexible air pipe 3, a location along the water bottom surface GL, This is because a straight portion extending upward from the water bottom GL is used as the hard air supply tube 3.

  FIG. 13 and FIG. 14 are enlarged longitudinal sectional views showing a procedure for attaching the air pipe in the movable breakwater according to the present embodiment. 13 and 14 show a state after the outer tube 11 is driven into the water bottom ground E and before the floating tube 12 is installed.

  As shown in FIG. 13, in the air supply tube 3, the tip 3A is inserted into the guide 11A from the opening of the upper part 11Aa in the guide 11A and pushed downward. The distal end portion 3A of the air supply tube 3 gradually moves downward in the guide portion 11A. At this time, since the locking portion 3C is pressed toward the concave portion 3Ac by contacting the inner surface of the guide portion 11A, the movement of the tip portion 3A is not hindered. In the unlikely event that the locking portion 3C hinders the movement of the tip portion 3A, the release means 3Cc resists the urging force of the elastic member 3Cb so that the locking claw 3Ca is entirely housed in the recess 3Ac. Then, the engaging claw 3Ca may be moved inwardly from the outer peripheral surface of the tip portion 3A. When the tip portion 3A reaches the bottom portion 11Ab of the guide portion 11A, the tip portion 3A is guided by the inclination of the bottom portion 11Ab and is inserted into the opening hole 11B as shown in FIG. When the distal end portion 3A is inserted into the opening hole 11B, the locking portion 3C is locked to the edge portion of the opening hole 11B inside the outer tube 11 and prevents the distal end portion 3A inserted into the opening hole 11B from coming off. . Thereafter, the air pipes 3 divided by the connection flange 3D are connected. When the air supply tube 3 is replaced, the locking claw 3Ca is moved to the distal end portion against the urging force of the elastic member 3Cb so that the locking claw 3Ca is entirely accommodated in the recess 3Ac by the release means 3Cc. If it is moved inward from the outer peripheral surface of 3A, the insertion of the tip 3A into the opening hole 11B is allowed, and the tip 3A can be removed from the opening 11B.

  As described above, the movable breakwater 10 of the present embodiment is formed in a vertically long shape, and has an outer tube 11 that has an opening 11a on the water bottom side and is inserted and fixed in the water bottom ground E, and an outer tube. A levitation tube 12 that is inserted into the outer tube 11 so as to be movable up and down in the longitudinal direction of the outer tube 11, and is provided so as to be able to rise by generating buoyancy with the gas supplied to itself. 12 is a movable breakwater 10 provided with an air supply pipe 3 for supplying gas into the interior of 12. In the movable breakwater 10, the outer tube 11 has a guide part 11A that forms a space in which the upper part 11Aa is open and the bottom part 11Ab is closed continuously from the upper end to the outer side of the outer pipe 11 and the guide part 11A. It has an opening hole 11B that leads from the space of the guide portion 11A to the inside at the position of the closed bottom portion 11Ab, and the air supply pipe 3 is inserted from the opening of the upper portion 11Aa of the guide portion 11A so that the tip portion 3A is inserted. The bottom portion 11Ab is inserted into the opening hole 11B, and the distal end portion 3A has a locking portion 3C locked to the edge of the opening hole 11B.

  According to this movable breakwater 10, the guide portion 11A moves the distal end portion 3A of the air feed tube 3 to the position where it is inserted into the opening hole 11B along the outside of the outer cylindrical tube 11 inserted and fixed in the water bottom ground E. Can be made. Moreover, the tip 3A inserted into the opening hole 11B can be locked by the locking portion 3C, and the tip 3A can be prevented from coming off from the opening 11B. As a result, the arrangement state of the air pipe 3 can be maintained.

  Moreover, in the movable breakwater 10 of this embodiment, it is preferable that the air pipe 3 has the release means 3Cc which cancels | releases the latching | locking part 3C with respect to the opening hole 11B.

  According to this movable breakwater 10, the distal end portion 3A of the air supply tube 3 is opened when the air supply tube 3 is replaced by releasing the engagement of the engagement portion 3C with the opening hole 11B by the release means 3Cc. It can be easily removed from the hole 11B.

  Incidentally, FIG. 15 is an enlarged longitudinal sectional view showing another example of the fixing structure of the air pipe in the movable breakwater according to this embodiment.

  In the movable breakwater 10 shown in FIG. 15, the above-described locking portion 3C is not provided at the distal end portion 3A of the air supply tube 3, but the air supply tube 3 is inserted into the opening hole 11B inside the guide portion 11A. It has a filling member 30 that is injected into the portion and restricts the movement of the air supply tube 3. The filling member 30 is made of, for example, urethane foam. Then, with the distal end portion 3A of the air supply tube 3 inserted into the opening hole 11B, an injection tube (not shown) is inserted from the opening of the upper portion 11Aa of the guide portion 11A toward the bottom portion 11Ab, and the air supply tube 3 opens. The filling member 30 is injected into the portion inserted into the hole 11B.

  As described above, the movable breakwater 10 of the present embodiment shown in FIG. 15 is formed in a vertically long shape, and has an outer tube 11 that has an opening 11a on the bottom side and is inserted and fixed in the bottom bottom ground E. The levitation tube 12 is inserted into the outer tube 11 and arranged to be movable up and down in the longitudinal direction of the outer tube 11, and the buoyancy is generated by the gas supplied to the inside of the tube 11 so as to be raised. And a movable breakwater 10 including an air supply pipe 3 that supplies gas into the inside of the levitation pipe 12. In the movable breakwater 10, the outer tube 11 has a guide part 11A that forms a space in which the upper part 11Aa is open and the bottom part 11Ab is closed continuously from the upper end to the outer side of the outer pipe 11 and the guide part 11A. It has an opening hole 11B that leads from the space of the guide portion 11A to the inside at the position of the closed bottom portion 11Ab, and the air supply pipe 3 is inserted from the opening of the upper portion 11Aa of the guide portion 11A so that the distal end portion 3A is inserted. It reaches the bottom 11Ab and is inserted into the opening hole 11B. And it has the filling member 30 which is inject | poured into the part which is the inside of the guide part 11A, and the air supply pipe | tube 3 is inserted in the opening hole 11B, and controls the movement of the air supply pipe | tube 3.

  According to this movable breakwater 10, the guide portion 11A moves the distal end portion 3A of the air feed tube 3 to the position where it is inserted into the opening hole 11B along the outside of the outer cylindrical tube 11 inserted and fixed in the water bottom ground E. Can be made. In addition, by restricting the movement of the air supply tube 3 inserted into the opening hole 11B by the filling member 30, it is possible to prevent the tip 3A from coming off from the opening hole 11B. As a result, the arrangement state of the air pipe 3 can be maintained.

  FIG. 16 is an enlarged vertical cross-sectional view showing an additional example of an air pipe fixing structure in the movable breakwater according to the present embodiment.

  The movable breakwater 10 shown in FIG. 16 has the locking portion 3C and the filling member 30 described above, and also has a fixing portion 31 that fixes the air feeding tube 3 to the outer tube 11 side. The fixing part 31 is installed at the position of the opening of the upper part 11Aa of the guide part 11A. The fixed portion 31 includes a fixed plate 31A fixed to the outer tube 11 at the side portion of the guide portion 11A, and a U-shaped U-shaped bolt that is fixed to the fixed plate 31A by a nut 31Ba and suppresses the periphery of the air supply tube 3. 31B. Although this fixing | fixed part 31 may be arrange | positioned by single, in this embodiment, as shown in FIG. 16, the fixing board 31A is fixed to the both sides of the guide part 11A, and it uses two U-shaped volt | bolts 31B. The air pipe 3 is configured to be surrounded from both sides.

  As described above, the movable breakwater 10 shown in FIG. 16 preferably includes a fixing portion 31 that fixes the air supply tube 3 to the outer tube 11 side at the position of the opening of the upper portion 11Aa of the guide portion 11A.

  According to this movable breakwater 10, the tip 3 </ b> A is prevented from coming off from the opening hole 11 </ b> B by the locking part 3 </ b> C or the filling member 30, and further sent by the fixing part 31 at the position of the opening of the upper part 11 </ b> Aa of the guide part 11 </ b> A. By fixing the trachea 3 to the outer tube 11 side, the effect of maintaining the arrangement state of the air pipe 3 can be obtained more remarkably.

  Moreover, according to the movable breakwater facility 1 in which a plurality of the movable breakwaters 10 described above are arranged on the bottom of the water, the movable breakwater 10 can be moved without any trouble by maintaining the arrangement state of the air pipe 3. .

DESCRIPTION OF SYMBOLS 1 Movable wave-proof facility 3 Air supply pipe 3a Gas outlet 3A Tip part 3Aa Through-hole 3Ab Coupling part 3Ac Recessed part 3B Air supply main-body part 3Ba Inner pipe 3Bb Outer pipe 3C Locking part 3Ca Locking claw 3Caa Oscillating shaft 3Cb Elastic member 3Cc Release means 3D Connection flange 10 Movable breakwater 11 Outer tube 11a Opening portion 11A Opening portion 11A Guide portion 11Aa Upper portion 11Ab Bottom portion 11B Opening hole 12 Floating tube 12a Opening portion 30 Filling member 31 Fixing portion 31A Fixing plate 31B U-shaped bolt 31Ba Nut

Claims (5)

An outer cylindrical tube that is formed vertically and has an opening on the bottom of the water and is inserted and fixed in the bottom of the water bottom, and is inserted into the outer cylindrical tube and moved up and down in the longitudinal direction of the outer cylindrical tube In a movable breakwater provided with a levitation tube that is arranged so as to be able to rise by generating buoyancy by the gas supplied to itself and an air supply tube that supplies gas to the inside of the levitation tube,
The outer tube has a guide portion that forms a space in which an upper portion is continuously opened from the upper end in the vertical direction on the outer side and a bottom portion is closed, and a space of the guide portion at the closed bottom portion of the guide portion. And has an opening hole that leads to the inside of the
The air supply pipe has an engaging portion that is inserted from the opening at the top of the guide portion, the distal end portion reaches the bottom portion, is inserted into the opening hole, and is engaged with the edge portion of the opening hole at the distal end portion. This is a movable breakwater.   The movable breakwater according to claim 1, wherein the air supply pipe has release means for releasing the lock of the lock portion with respect to the opening. An outer cylindrical tube that is formed vertically and has an opening on the bottom of the water and is inserted and fixed in the bottom of the water bottom, and is inserted into the outer cylindrical tube and moved up and down in the longitudinal direction of the outer cylindrical tube In a movable breakwater provided with a levitation tube that is arranged so as to be able to rise by generating buoyancy by the gas supplied to itself and an air supply tube that supplies gas to the inside of the levitation tube,
The outer cylindrical tube is formed from the space of the guide portion at the position of the guide portion that forms a space in which the upper portion continuously opens from the upper end to the outside in the vertical direction and the bottom portion is closed, and the closed bottom portion of the guide portion. An opening hole that communicates with itself, and the air supply pipe is inserted from the opening at the top of the guide part, and the tip part reaches the bottom part and is inserted into the opening hole,
A movable breakwater characterized by having a filling member that is injected into a portion of the guide portion where the air supply pipe is inserted into the opening to restrict movement of the air supply pipe.   The movable breakwater according to any one of claims 1 to 3, further comprising a fixing portion that fixes the air supply pipe to the outer tube pipe side at a position of an opening in the upper portion of the guide portion.   A movable breakwater facility, wherein a plurality of the movable breakwaters according to any one of claims 1 to 4 are arranged on the bottom of the water.

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