JP6490473B2 - Pull-up type flap-in gate installation method - Google Patents

Description

  The present invention relates to a method of installing a pull-up type flap-in gate for preventing backflow that is mainly installed on a coast, a river, or a water channel.

Conventionally, in order to prevent damage from tsunamis and floods, locks and sluices have been set up in rivers and waterways, tide sluices have been set up in estuaries, and seawalls have been built by building a tide bank on the coast. It has been.
During normal times, the locks and sluice gates are open and closed during emergencies such as tsunami and backflow.

  For lock gates and sluice gates, pull-up gates and flap gates such as roller gates and slide gates are often used. If the scale of the sluice is large, there are many pull-up gates, and if it is small, a flap gate may be installed.

  As described in Patent Document 1, when the water level of seawater or the like is higher than the location where the flap gate is installed, the flap gate prevents the flap gate from swinging due to the movement of waves and the like. An opening / closing device for preventing damage to the flap gate is disclosed.

  Moreover, like the automatic gate of patent document 2, although a water channel is always obstruct | occluded with the door body which is always obstruct | occluded or slightly opened, in addition to enabling the outflow of a small amount of flowing water from the flowing water channel side, the flow volume on the flowing water channel side is In the case of an increase, the door body is opened widely and allowed to flow out easily, and the door body is moved from the main river side to the frame body (soot box by an abnormal rise in water pressure due to an abnormal rise in the water level on the main river side. ) Is closed to close the outflow port, thereby preventing the reverse flow of abnormally rising water of the main river side water level to the tributary side.

  5 and 6, the conventional pull-up gate 110 has a structure in which the door body 120 has a structure called a skin plate 121 and groove steels 122 to 126 are welded vertically and horizontally at predetermined intervals as reinforcing members. There are many. Further, as shown in FIG. 5B and FIG. 6, there are some which have a drainage function by providing an opening 127 in a part of the skin plate 121 and attaching a flap valve 140 thereto.

However, a conventional pull-up gate such as a roller gate has a very large gate area, and the gate body of the gate may be damaged due to a tsunami or water pressure at the time of backflow, which may cause trouble in opening and closing.
Even if the tsunami is prevented, rivers cannot be drained unless the gates are opened, which may cause secondary disasters such as river breaks.

  Furthermore, with regard to the operation of river management facilities, there is an option not to perform the opening / closing operation if the safety of the operator cannot be ensured based on the Great East Japan Earthquake. On the other hand, in the case of sluice gates and lock gates, in the event of a major earthquake or disaster, communication and traffic network disruptions, telephone network congestion, and other factors can cause unforeseen situations in remote operation and local operation. Ensuring is important.

  Moreover, although the flap gate like patent document 1 or patent document 2 is suitable for a small-scale sluice such as a drainage lock, it is applied to a large-scale sluice such as a river mouth. This is difficult in terms of cost and strength.

  Furthermore, although the auto gate of Patent Document 2 can prevent the inclusion of foreign substances such as dust to some extent, depending on the amount and size of the foreign substances, there is a possibility that the insertion cannot be completely prevented. There was a problem in terms.

  Further, when a flap valve is provided on a pull-up type gate having a structure in which a reinforcing member is welded to a skin plate as shown in FIGS. 5 and 6, a flap valve is provided in a section surrounded by the reinforcing member. Therefore, the size of the opening is limited, and it may be difficult to provide a sufficient amount of drainage.

In response to these problems, the present applicant has invented a pull-up type flap-in gate capable of providing a flap valve provided on a door body as large as possible, as in Patent Document 3 and Patent Document 4.
By this invention of the pull-up type flap-in gate, even if the gate can no longer be pulled up at the time of a disaster etc., the drainage of the water channel can be performed automatically by the flap valve. Since it can prevent secondary disasters, increase the opening part after securing the strength of the door, and increase the amount of drainage, install it at the exit of relatively large rivers and waterways There is an advantage that makes it possible.

Utility model registration No. 30111165 JP 2000-120049 A Japanese Patent Application Laid-Open No. 2014-88752 JP 2014-136885 A

  However, even if it is a pull-up type flap in gate like patent documents 3 and patent documents 4, if it installs without carrying out special construction in a gate installation part like Drawing 2 and Drawing 3 of patent documents 3, a gate The opening of the flap valve is inevitably smaller than the installation part. In other words, since the water cross-sectional area becomes smaller than the water channel, there is a possibility that the drainage function cannot be fully utilized.

  An object of the present invention is to provide a pull-up type flap-in gate in which the opening of the door body can have a shape that matches the water passage section of the gate installation portion, and the drainage function can be secured. The purpose is to provide a gate installation method.

  The present invention has been made to solve the above-described problems, and the invention of the pull-up type flap-in gate installation method according to claim 1 is an opening that matches the cross-sectional shape of the water channel in which the gate is installed. A door body having a section, and a flap valve that pivots the opening to open and close the door body, and a pull-up type flap-in gate that opens and closes the water channel by the vertical movement of the door body In the state where the pull-up type flap-in gate closes the water channel, the height direction of the front view is a step on the bottom surface of the water channel so that the opening and the water flow cross-sectional shape of the water channel coincide with each other. And the step of installing the bottom of the opening from the vicinity of the lower end of the opening to the bottom of the water channel, and the state where the pull-up type flap-in gate closes the water channel, The horizontal width direction of the front view so that it matches the shape is provided with door grooves on the left and right side surfaces of the water channel through which the pull-up type flap-in gate can pass up and down, and the door body corresponds from the vicinity of each end of the opening width direction. The pull-up type flap-in gate installation method is characterized in that the pull-up type flap-in gate is installed in the water channel in a step including the step of installing each side surface outside the side surface of the water channel.

  The invention according to claim 2 is the pull-up type flap-in-gate installation method according to claim 1, wherein the door groove guides the door body in the vertical direction.

  According to the pull-up type flap-in-gate installation method of the present invention, a step is provided on the bottom surface of the water channel so that the opening and the water flow cross-sectional shape of the water channel coincide with each other at the time of installation from the vicinity of the lower end of the opening to the bottom surface of the door body. And a width direction in the width direction of each side of the water channel is provided with a door groove through which the pull-up type flap-in gate can pass vertically, and from the vicinity of each end of the opening width direction of the door body Since the pull-up type flap-in gate is installed in the waterway in a process including the steps of installing each corresponding side surface outside the side surface of the waterway, the opening area and the waterway cross-sectional area are equivalent, so the amount of drainage in the waterway However, there is an advantage that the drainage function can be secured because it is equal to a normal lock gate and a pull-up gate.

  It is also possible to stably open and close the gate by constructing so that the door groove can guide the vertical movement of the door body.

The front view of embodiment of the gate used for the pull-up type flap in gate installation construction method concerning the present invention is shown. The side sectional view of the embodiment of the gate used for the pull-up type flap in gate installation method according to the present invention is shown. The plane sectional view of the embodiment of the gate used for the pull-up type flap in gate installation method concerning the present invention is shown. (A) is an overall plan sectional view, (b) is an enlarged view of a main roller portion, and (c) is an enlarged view of a conventional main roller portion. It is a state figure at the time of the normal closing of the pull-up type flap ingate by the pull-up type flap in gate installation method concerning the present invention, (a) is the conventional installation method, (b) is a figure showing the installation method concerning the present invention. is there. It is a figure which shows the Example of the conventional pull-up type gate, (a) is a case without a flap valve, (b) is a case with a flap valve. The front view of the conventional pull-up type flap in gate is shown.

Hereinafter, with reference to the drawings, the structure of a pull-up type flap-in gate will be described first as an example of an embodiment of the invention. 1 is a front view of an embodiment of a pull-up type flap-in gate used in the pull-up type flap-in gate installation method according to the present invention, FIG. 2 is a side cross-sectional view, and FIG. 3 is a plan cross-sectional view.
The pull-up type flap-in gate 10 is a pull-up type gate that is provided mainly in the vicinity of the outlet of a water channel having a cross section mainly rectangular or trapezoidal to prevent back flow or back flow due to a tsunami.
The pull-up type flap-in gate 10 includes an opening frame-shaped door body 20 and a swinging flap valve 30 for opening and closing the opening 24 of the door body 20. The pull-up type flap-in gate 10 is a hanging bracket. The rod 29 connected to 28 is moved up and down by an opening / closing machine (not shown) to open and close the lock gate provided in the gate installation portion C which is an outlet portion from the drainage channel A to the river B. .
And the opening part 24 has the same water flow cross-sectional area in the shape similar to the gate installation part C like FIGS. 1-3.

  The flap valve 30 for opening and closing the opening 24 of the door body 20 is normally opened by swinging with the water pressure generated when the drainage from the drainage channel A hits the wall surface of the flap valve 30. Then, when the pressure of the water flow (back flow) from the river B becomes larger than the pressure of the drainage, the flap valve 30 swings to close the opening 24. As a case where the pressure of the backflow from the river B becomes large, a backflow caused by rising tides or a backflow caused by an earthquake tsunami can be considered.

  The door body 20 is an opening / closing member that opens and closes a water channel. The door body 20 has an opening frame shape having an opening 24 in the center portion. The cross-sectional shape of the frame has a hollow box girder structure that is also used in bridges and the like as shown in FIG. 2 and FIG. The box girder includes an upper frame box girder 21 that is horizontally arranged at the upper side, side frame box girder 22a, side frame box girder 22b, and side frame box girder that are welded vertically to both ends of the upper frame box girder 21. The lower frame box girder 23 arranged horizontally in the lower part is welded to the lower end of the side frame box girder 22b. According to FIG. 1, the side frame box girder is 22a on the left side and 22b on the right side, and the shape is symmetrical.

  Further, the side wall box girder 22a, the side frame box girder 22b and the opening 24 of the lower frame box girder 23 are provided with a flap valve door 25 on the side wall surface, and a flap valve 30 for opening and closing the opening 24 is provided. It is comprised so that it can contact | abut to flap valve door contact 25, and can be sealed.

Further, a main roller 26 is provided on the side frame box girder so as to be rotatable up and down via a roller shaft 27. The main roller 26 is in rolling contact with the door groove wall of Xiamen like an automobile tire and has a role of assisting the smooth opening and closing of the door body 20.
Since the main rollers 26 are provided on the left and right, in this embodiment, the main rollers 26 are constituted by four main rollers 26.

The case where the main roller 26 and the roller shaft 27 are attached to the door body 20 will be described by taking the case where the main roller 26 and the roller shaft 27 are attached to the side frame box girder 22a as an example, as shown in FIGS. 3 (a) and 3 (b). A hole 27b for inserting the roller shaft 27 is provided in a wall surface (left side surface in the figure) facing the opening 24 side of the frame box girder 22a, and the inner wall surface corresponding to the opening 24 side of the side frame box girder 22a corresponds. A roller bearing 27c is provided at the position, and the roller shaft 27 is pivotally supported together with the roller bearing 27d provided on the outer wall surface of the hole 27b. Similarly, the main roller 26 is provided at a total of four locations on the side frame box girder of the door body 20.
As a result, the member does not protrude toward the opening as in the conventional example of FIG. 3C, so that there is an advantage that the size and shape of the opening 24 are not restricted.
In this embodiment, a roller gate structure having the main roller 26 and the roller shaft 27 is provided, but a sliding gate structure without the main roller 26 and the roller shaft 27 may be used.

  A suspension fitting 28 is provided on the upper surface of the upper frame box girder 21 of the door body 20, and a rod 29 connected to the suspension fitting 28 is moved up and down by a switch 41 as shown in FIG. It is configured to open and close. The rod 29 may be a rack bar or a screw bar. In the present embodiment, the structure is opened and closed using a rod, but the door body 20 may be moved up and down by other methods, for example, a chain drive type may be used.

The flap valve 30 is for opening and closing the opening 24 having the same shape as the gate installation part C at the center of the opening frame-shaped door body 20.
The flap valve 30 has a shape that closes the opening 24 with a plate-like member 31 whose edge portion is reinforced, and a pair of flap valve suspension fittings 32 is provided on the upper portion of the flap valve 30. A rotating shaft 33 for rotating the flap valve 30 is attached to the pair of flap valve suspension fittings 32 in the horizontal direction.
Then, a pair of bearings 34 are provided horizontally on the water channel downstream side wall surface of the upper frame box girder 21 configured in the upper horizontal direction of the door body 20. The valve 30 swings around the rotation shaft 33 to open and close the opening 24 provided in the door body 20.

  Further, as shown in FIG. 2, a float 35 is provided on the wall surface of the flap valve 30 on the drainage channel A side. When draining the water channel, the opening 24 is opened by the water pressure applied to the drain channel A side of the flap valve 30. However, when the flap valve 30 is heavy, the opening is opened if the water pressure is not sufficient. Although there is an inconvenience that cannot be achieved, by providing the float 35, the float 35 can be used to release it.

  The flap valve 30 may be provided with a forced opening / closing mechanism (not shown). Since only the flap valve can be opened and closed by a signal from the outside, an unexpected situation can be immediately realized by quickly opening and closing only the lighter flap valve 30 than when opening and closing the heavy pull-up type flap-in gate 10. It can also respond.

Next, an embodiment of an installation method for installing the pull-up type flap-in gate 10 in a water channel will be described.
Since the opening portion 24 of the pull-up type flap-in gate 10 has a shape that matches the gate installation portion C, the door body 20 is naturally configured wider than the gate installation portion C.
For this reason, the pull-up type flap in gate 10 cannot be installed unless special construction is applied to the water channel.

Therefore, as shown in FIG. 2, in the height direction, a step 50 is provided on the bottom surface 51 of the water channel, and the water channel is processed and excavated so that the vicinity of the lower end of the opening 24 to the bottom surface of the door body is outside (downside) the water channel bottom surface 51. And install.
In the present embodiment, the height of the step 50 continues to the river side without recovering to the bottom 51 of the waterway, but the height is recovered so that foreign matter does not collect in the step 50 and get caught in the gate. It is good also as a method of processing, excavating and installing so that it may become a shape.

  Further, as shown in FIG. 3 (a), in the horizontal width direction, a door groove 60 through which the pull-up type flap-in gate 10 can pass up and down is provided on each of the left and right side surfaces of the gate installation portion C. The corresponding side surfaces of the door body 20 are installed outside the side surface of the gate installation portion C. The shape of the door groove 60 is a groove having a concave shape when viewed from above, having a waterway side groove wall 61 and a river side door groove wall 62.

Although the width of the waterway side ditch wall 61 and the river side ditch wall 62 may be the same, the width of the river side waterway is widened by shortening the width of the river side ditch wall 62 as shown in FIG. By doing so, there is an advantage that drainage can be performed more smoothly, and it is less likely that foreign matters such as dust are caught in the doorway.
It is also possible to stably open and close the gate by constructing the door groove 60 so that the main roller 26 comes into contact with the water channel side groove wall 61 and the river side door groove wall 62 to guide the vertical movement.

FIG. 4 shows an embodiment in which the pull-up type flap-in gate 10 is used as a lock gate. The lock gate 40 is provided with an opening / closing machine 41 on the upper part of the pull-up flap-in gate 10, and has a mechanism for opening and closing the gate by a rod 29.
The pull-up type flap-in gate 10 of the present invention has an advantage that it can function as an automatic opening / closing gate because the flap valve 30 is swung by water pressure when used in a normally closed state.
Further, the pull-up type flap-in gate 10 has an advantage that the drainage function can be ensured because the flap valve is provided even if the lock gate is damaged by a tsunami or the like and the gate body is lifted and opened.

When the conventional pull-up type flap-in gate 10 that does not use the installation method of the present invention as shown in FIG. 4A is used as a lock gate, the opening section height is lower than the water passage section height, and the water passage is interrupted. Since the area was small, there was a possibility that the drainage function could not be fully demonstrated.
However, when the installation method of the present invention is used as shown in FIG. 4 (b), the opening cross-sectional height is equal to the water cross-sectional height, and the water cross-sectional area is also equal. It can be demonstrated.

  The installation method according to the present invention is not limited to an installation method when a gate is newly installed, but also when changing from an existing pull-up type gate to a pull-up type flap-in gate 10, the step 50 and the door groove 60. It is possible to install by drilling.

  The pull-up type flap-in gate installation method of the present invention has been described by taking the drainage lock gate of the waterway as an example.

A Drainage channel B River C Gate installation part 10 Pull-up type flap in gate 20 Door body 20a Door body bottom surface 20b Door body side surface 20c Door body side surface 21 Upper frame box girder 22a Side frame box girder 22b Side frame box girder 23 Lower frame Box girder 24 Opening 24a Opening lower end 24b Opening right end 24c Opening left end 25 Flap valve door contact 26 Main roller 27 Roller shaft 27b Hole 27c Roller bearing 27d Roller bearing 28 Hanging bracket 29 Rod 30 Flap valve 31 Plate member 32 Flap Valve hanging bracket 33 Rotating shaft 34 Bearing 35 Float 40 Xiamen 41 Opening and closing machine 42 Management bridge 43 Embankment 50 Step 51 Water channel bottom 60 Door groove 61 Water channel side groove wall 62 River side groove wall

Claims (2)

A door body having an opening that matches the cross-sectional shape of the water channel in which the gate is installed, and a flap valve that pivots the opening to open and close the door body, the vertical movement of the door body A method of installing a pull-up type flap-in gate in the water channel that is opened and closed by the water channel,
In the state where the pull-up type flap-in gate closes the water channel, the height direction of the front view is provided with a step on the bottom surface of the water channel so that the opening and the water flow cross-sectional shape of the water channel coincide with each other. Installing from the vicinity to the bottom of the door body below the bottom of the water channel;
In the state in which the pull-up flap in gate closes the water channel, the pull-up flap in gate is on the left and right side surfaces of the water channel in the width direction in front view so that the opening and the cross-sectional shape of water passage of the water channel match. Providing a door groove that can pass vertically, and installing from the vicinity of each end of the opening width direction to each corresponding side surface of the door body outside the water channel side surface,
A pull-up type flap-in gate installation method characterized by installing a pull-up type flap-in gate in a waterway in a process including   The pull-up type flap in gate installation method according to claim 1, wherein the door groove guides the door body in a vertical direction.

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