JP5721080B2 - Dam discharge gate - Google Patents

Description

  The present invention relates to a dam discharge gate, and more particularly to a dam discharge gate including a door body that opens and closes by moving up and down a downstream opening of a discharge pipe installed in the dam.

  For example, in the discharge gate of a dam that opens and closes the downstream end opening of a full-pipe type discharge water channel (discharge tube) installed in the dam, such as a slide gate, roller gate, radial gate, tension radial gate, etc. Generally, the door body is configured to move up and down along the downstream opening of the discharge pipe. And in order to maintain the water tightness and prevent the leakage of water when the door body completely closes the downstream side opening of the discharge water channel (when fully closed), it is disclosed in, for example, Patent Document 1 and Patent Document 2. In addition, a watertight member is provided between the door body and the door body on the downstream side of the discharge pipe and the corresponding peripheral end face (door stop). For this reason, the door body is generally formed in a size that can be covered, including a watertight member provided at the door end of the downstream opening of the discharge pipe.

  That is, in the prior art, generally, a watertight rubber is also provided in the lower part of the door at the downstream opening of the discharge pipe, and the downstream opening of the discharge pipe is in contact with the lower watertight rubber at the lower limit of the door body. It was set beyond.

Japanese Utility Model Publication No.59-19629 Japanese Utility Model Publication No. 62-38933

  However, as described above, in the general prior art in which the watertight rubber is provided also in the lower part of the downstream opening of the discharge pipe, the second page of the specification of Patent Document 2 and the fourth line to the same. As described in the 10th line of the page, for example, when the door body is slightly lifted from the fully closed state or immediately before the door body is fully closed, the lower edge of the door body is downstream. When positioned slightly above the watertight rubber located at the lower part of the side opening, the water jet discharged from the downstream opening of the discharge pipe is squeezed between the door stop and the door body. There was a problem that the water-tight rubber collided with the water-tight rubber, resulting in damage or vibration of the water-tight rubber.

  The present invention has been made in view of the above-described problems, and has a simple configuration, when the door body is slightly raised from the fully closed state, or immediately before the door body is fully closed. However, the watertightness is maintained so that the watertight member is not damaged by the pressure of the waterflow flowing out from the downstream side opening of the discharge pipe, and the water is not reliably discharged when the door body is fully closed. The purpose is to provide a discharge gate for dams.

In order to achieve the above object, the dam discharge gate according to claim 1 is a dam discharge gate including a door body that opens and closes a downstream opening of the discharge pipe by moving up and down. The bottom of the discharge pipe is extended toward the downstream side so that the lip portion of the lower end of the lip is abutted when fully closed, and the side of the downstream opening of the discharge pipe and the door body And a side watertight member whose lower end surface is in contact with the bottom of the discharge pipe, and the side watertight member has a lower end surface on the side contacting the door body. An inclined portion that is inclined with respect to the opening / closing movement direction of the door body so as to gradually expand toward the downstream side, and the lip portion engages with the inclined portion when the door body is fully closed. And a pressing portion that presses the lower end surface against the bottom of the discharge pipe. The features.
In order to achieve the above object, the invention according to the discharge gate of the dam according to claim 2 is characterized in that in the invention according to claim 1, the lower watertightness is provided at either the lip portion of the door body or the abutting portion of the extended bottom portion. A member is provided.
In order to achieve the above object, the invention according to the discharge gate of the dam according to claim 3 is characterized in that, in the invention according to claim 2, the lower watertight member and the side watertight member when the door body is fully closed. It has an abutting portion that is abutted and maintains watertightness between the lower watertight member and the side watertight member.
A fourth aspect of the invention relating to the discharge gate of the dam is the invention according to any one of the second or third aspect, wherein the lower watertight member is provided in the lip portion. An abutted member with which the lower watertight member is abutted is detachably provided at the abutting portion of the extended bottom portion.
In order to achieve the above object, the invention according to the discharge gate of the dam according to claim 5 is the invention according to any one of claims 2 and 3 , wherein the lower watertight member is attached to and detached from the abutting portion of the extended bottom portion. It is provided as possible.

According to the invention of claim 1, when the door body is slightly raised from the fully closed state or just before the door body is fully closed (at a minute opening), the water flowing out is Since it flows along the extended bottom extending from the discharge pipe between the extended bottom and the lip of the door body toward the downstream side of the discharge pipe, the bottom of the downstream opening of the discharge pipe as in the prior art The water flow flowing out from the downstream opening of the discharge pipe does not collide with the water-tight member provided around the water-tight member, and the water-tight member can be prevented from being damaged by the pressure of the water flow. And when the door body is in a fully closed state, the lip portion of the door body abuts the extended bottom portion that extends the bottom portion of the discharge pipe toward the downstream side, so that water does not flow out reliably. It can keep water tightness. When the door is fully closed, the pressing portion of the lip portion of the door body engages with the inclined portion of the side watertight member disposed between the side portion of the downstream opening of the discharge pipe and the door body. Since the lower end surface is pressed against the bottom of the discharge pipe, it is possible to reliably prevent water from leaking from between the lower end surface of the side watertight member and the bottom of the discharge pipe.
According to the invention of claim 2, in the invention of claim 1, the lower watertight member is provided at either the lip portion of the door body and the abutting portion of the extended bottom portion, so that a small opening degree is obtained. Sometimes the water flow flowing out from the downstream opening of the discharge pipe does not collide, and it is possible to prevent the lower watertight member from being damaged by the pressure of the water flow, and the lip portion of the door body and the extension bottom portion can be prevented. Watertightness can be reliably maintained by the collision.
According to the invention of claim 3, in the invention of claim 2, the lower watertight member is brought into contact with the side watertight member when the door body is fully closed, so that the lower watertight member and the side watertight member are in contact with each other. By having a contact portion that maintains watertightness with the member, the contact portion of the lower watertight member contacts the side watertight member when the door body is fully closed, and the lower watertight member and the side portion It is possible to reliably prevent water from leaking from between the watertight member.
According to the invention of claim 4, in the invention of claim 2 or 3, the lower watertight member is provided in the lip portion, and the impacted with which the lower watertight member is abutted. Since the joint member is detachably provided at the abutting portion of the extended bottom portion, the abutting portion of the extended bottom portion where the lip portion is abutted is worn or damaged due to mixing of sand and sand into the discharged water. Even in such a case, it is possible to easily repair by exchanging the abutted member provided at the abutting portion of the extended bottom portion, maintain water tightness, and reliably prevent leakage of water.
According to a fifth aspect of the invention, in the invention according to any one of the second or third aspects, the lower watertight member is detachably provided at the abutting portion of the extended bottom portion, thereby allowing water to be discharged. Even if the lower watertight member is worn or damaged due to soil or sand mixed in, the lower watertight member can be easily repaired by replacing the lower watertight member, maintaining water tightness and reliably preventing water leakage. be able to.

In order to explain one embodiment of the discharge gate of the dam of the present invention, the door body is in the fully closed state (a), when the door body is slightly raised from the fully closed state, or immediately before the door body is fully closed. It is principal part sectional drawing shown in order to demonstrate a state (b). It is the partial expansion vertical side view shown in order to demonstrate the state which closed the door body fully. It is the partial expanded transverse plane shown in order to demonstrate the state which closed the door body and the contact part of the lower watertight member contacted the side watertight member. The state (a) before the door body is fully closed, and the door body is fully closed, and the pressing portion of the lip portion of the door body is engaged with the inclined portion of the side water-tight member, and the lower end surface of the side water-tight member It is the partial expanded vertical side view shown in order to demonstrate the state (b) pressed against the bottom part of a discharge pipe. It is the partial expanded vertical side view shown in order to demonstrate embodiment which provided the lower watertight member in the lip | rip part, and provided the to-be-contacted member in the abutting part of the extended bottom part so that attachment or detachment was possible. It is the partial expanded vertical side view shown in order to demonstrate embodiment which provided the lower watertight member in the abutting part of the extended bottom part so that attachment or detachment was possible.

One embodiment of the sluice according to the present invention will be described mainly based on FIGS. In the following description, the upstream side is the left side of the figure, and the downstream side is the right side of the figure.
The discharge gate of the dam of the present invention is roughly a door body 2 that opens and closes the downstream opening 1a of the discharge pipe 1 by moving up and down, and a water tightness that maintains water tightness between the downstream opening 1a and the door body 2. And an extended bottom portion 15 that extends the bottom portion 10 of the discharge pipe 1 toward the downstream side so that the lip portion 20 at the lower end of the door body 2 is abutted when the door body 2 is fully closed. ing.
In this embodiment, the watertight member 3 includes a lower watertight member 30 disposed between the lip portion 20 of the door body 2 and the abutting portion of the extended bottom portion 15, and the downstream opening 1 a of the discharge pipe 1. The side watertight member 31 disposed on the side portion of the first pipe and the upper watertight member 32 disposed on the upper portion of the downstream opening 1a of the discharge pipe 1 are configured.

  The discharge pipe 1 in this embodiment is formed into a rectangular cross section having a bottom part 10, both side parts 11 and a ceiling part 12, and therefore the shape of the downstream end 1a of the discharge pipe 1 is also rectangular. . The surface of the discharge pipe 1 can be directly constituted by, for example, concrete 14 forming a dam, and, if necessary, from a material different from the concrete 14 such as metal as shown in FIGS. It can also be covered with a tube shell plate 13. Further, a ring girder 13 a can be provided around the tube body plate 13 to reinforce the tube body plate 13.

  As shown in FIGS. 1, 2, and 4, the discharge pipe 1 has its bottom 10 extended to the downstream side (right side in the drawing) including the tube body plate 13, and an extended bottom 15 is formed. Yes. The extended bottom portion 15 is not necessarily formed by integrally extending the bottom portion 10 of the discharge pipe 1, and is configured separately from the bottom portion 10 of the discharge pipe 1, and the extended bottom portion 15 is configured as a bottom portion of the discharge pipe 1. 10 can be provided in the downstream opening 1 a of the discharge pipe 1 so as to be continuous with the discharge pipe 1.

  The door body 2 is configured by providing a horizontal beam 22 and a vertical beam 23 on the back surface of the skin plate 21. A lip portion 20 is provided at the lower end of the door body 2. As the door body 2 in this embodiment, a case of a slide gate that moves up and down by a hoisting device (not shown) will be described. As shown in FIGS. 2 to 4, a lower watertight member 30 is disposed on the downstream surface of the lip portion 20. The lower watertight member 30 is formed in a substantially band shape, and an engaging protrusion 30a is formed on the upper portion of the downstream surface. A plate-like pressing member 40 is disposed on the downstream side of the lower watertight member 30. A shaft portion of a fastening means 41 such as a bolt is inserted into the lower watertight member 30 and the presser member 40, and is fastened to the lip portion 20, thereby lowering the lower portion between the presser member 40 and the lip portion 20. A watertight member 30 is held.

  The lower watertight member 30 can be made of an elastic material such as rubber, for example, and as shown in FIG. 4 (a), in a state away from the extended bottom 15 (a state where the door body 2 is opened), 4 slightly protrudes from the lower ends of the presser member 40 and the lip portion 20, and the upstream side of the extended bottom portion 15 and the lip portion 20 when the door body 2 is lifted slightly from the fully closed state as shown in FIG. It is formed in a flat plate shape or strip shape having a rectangular cross section having a width (height in the vertical direction in FIGS. 2 and 4) that the water flow S flowing between the lower end corner portion 20a does not directly hit. Then, both end portions 30b of the lower watertight member 30 are exposed from the upstream side surface of the lip portion 20 as shown in FIG. 3, and bent so as to be in contact with the vicinity of the lower end of the protruding portion 31a of the side watertight member 31 as will be described later. Has been.

  As shown in FIG. 3, a frame 50 for attaching the side watertight member 31 and the upper watertight member 32 is provided on the side portion and the upper portion around the downstream end opening 1 a of the discharge pipe 1. . The side watertight member 31 and the upper watertight member 32 are integrally formed so as to protrude from the base portions 31b and 32b held by the frame 50 to the side facing the door body 2 from the base portions 31b and 32b in cross section. 31a and 32a. A plate-like pressing member 51 is applied to the outside of the protrusions 31a and 32a when viewed from the downstream end opening 1a of the base portions 31b and 32b. A shaft portion of a fastening member 52 such as a bolt is inserted into the holding member 51 and the base portions 31b and 32b, and the distal end of the shaft portion of the fastening member 52 is fastened to the frame 50, whereby the side watertight The member 31 and the upper watertight member 32 are held by the frame 50. The side watertight member 31 and the upper watertight member 32 can be configured continuously and integrally, but can also be configured separately.

  Here, the lower end surface 31 c of the side watertight member 31 is brought into contact with the bottom 10 of the discharge pipe 1. Therefore, in this embodiment, as shown in FIGS. 2 and 4, the lower end of the side watertight member 31 is such that the side in contact with the door 2 gradually expands toward the downstream side toward the lower end surface 31c. An inclined portion 31d that is inclined with respect to the two opening / closing movement directions (up-and-down movement directions) is formed. On the other hand, the lower end portion of the lip portion 20 of the door body 2 on the side corresponding to the side watertight member 31 is engaged with the inclined portion 31d when the door body 2 is fully closed, and the lower end surface 31c thereof is the discharge pipe 1. A pressing portion 20d that presses against the bottom portion 10 of the side portion is formed so as to be inclined corresponding to the inclined portion of the side watertight member.

  Furthermore, as described above (FIG. 3), both end portions 30b of the lower watertight member 30 provided in the lip portion 20 are bent and slightly protrude from the surface of the lip portion 20, and are side portions when fully closed. It joins with the protrusion 31a of the inclined part 31d of the watertight member 31.

  Next, the operation of the discharge gate of the dam configured as described above will be described. First, in a state where the discharge gate is fully closed (see FIG. 1A, FIG. 2 and FIG. 4B), the door body 2 is lowered, and the lower portion provided in the lip portion 20 A watertight member 30 is in contact with the extended bottom 15 of the discharge pipe 1. At this time, the pressing portion 20d of the lip portion 20 is engaged with the inclined portion 31d at the lower end of the side watertight member 31, and the lower end surface 31c of the side watertight member 31 is pressed against the bottom portion 10 of the discharge pipe 1. Moreover, both end surfaces 30 b of the lower watertight member 30 are joined to the protrusions 31 a of the inclined portion 31 d of the side watertight member 31. Accordingly, a lower watertight member 30 is provided between the lip portion 20 and the extended bottom portion 15 of the door body 2, and a side watertight member 31 is provided between the side portion of the door body 2 and both side portions of the downstream opening 1 a of the discharge pipe 1. Thus, the upper watertight member 32 between the upper portion of the door body 2 and the upper portion of the downstream opening 1a of the discharge pipe 1 and the gap between the lower end surface 31c of the side watertight member 31 and the bottom portion 10 of the discharge pipe 1 Since the inclined surface 31 d of the side watertight member 31 is pressed by the pressing portion 20 d of the lip portion 20, the lower watertight member 30 is further bent between the lip portion 20 and the side watertight member 31. 30b and the protrusion 31a of the side watertight member 31 are joined, so that watertightness is maintained. This reliably prevents the water in the discharge pipe 1 from being inadvertently leaked.

  On the other hand, in the state in which the door body 2 is slightly raised from the fully closed state (see FIG. 1B and FIG. 4A), the lower watertight member 30 provided in the lip portion 20 is the discharge pipe. 1, the water in the water discharge pipe 1 is discharged. At this time, the water flow S flows from between the extended bottom portion 15 and the upstream lower end corner portion 20a of the lip portion 20, as shown in FIG. The lower portion of the water flow S flows in parallel with the upper surface of the extended bottom portion 15, and the upper portion of the water flow is regulated by the upstream lower end corner portion 20 a immediately after passing the upstream lower end corner portion 20 a of the lip portion 20. A curve is drawn so as to flow once downward due to the contraction effect and then flow obliquely upward due to the diffusion action of the discharge water vein. The lower watertight member 30 is made of an elastic material and is shaped like a band. The lower end of the lower watertight member 30 protrudes slightly from the lip portion, and is attached to the downstream surface of the lip portion 20. Therefore, the water flow S flowing out from the downstream opening of the discharge pipe does not collide with the watertight member provided around the bottom of the downstream opening of the discharge pipe as in the prior art. It does not hit the lower end of the lower watertight member 30 and is discharged downstream. Therefore, unlike the prior art, the lower watertight member 30 is not damaged or caused to vibrate by the pressure of the water discharged in the form of a jet. Further, when the lower water-tight member 30 has lost its elasticity, such as when it loses its elasticity, the fastening by the fastening means 41 is released, and the lower water-tight member 30 that has reached the end of its life together with the presser member 40 is removed, and a new lower water-tight member 30 is removed. The lower watertight member 30 can be easily replaced by arranging the member 30 so as to overlap the plate-like pressing member 40 and fastening the fastening means 41.

  Next, another embodiment of the present invention will be described with reference to FIG. In this embodiment, parts that are the same as or correspond to those in the above-described embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.

  In the discharge gate of the dam in this embodiment, the contacted member 6 is attached to and detached from the portion of the extended bottom portion 15 of the discharge pipe 1 where the lower watertight member provided on the lip portion 20 of the door body 2 is contacted. It is provided as possible.

  The abutted member 6 is formed in a substantially plate shape, and the width (the length between both sides) and the thickness (the upstream surface and the downstream side) of the lip portion 2 provided with the lower watertight member 30. It has a surface larger than the interval between the surfaces, and is molded with a predetermined thickness. The abutted member 6 can be made of the same or different material as the material constituting the extended bottom portion 15 of the discharge pipe 1, such as a hard stone, metal, or elastic member. In the part where the lower watertight member 30 of the extended bottom 15 of the discharge pipe 1 is abutted, the abutted member 6 is accommodated so that the surface of the abutted member 6 is flush with the surface of the extended bottom 15. A recess 15a is formed. The abutted member 6 accommodated in the recess 15 a is fastened by a fastening member 61 such as a bolt inserted from the lower surface of the extended bottom portion 15.

Next, the operation of the discharge gate of the dam in the embodiment described based on FIG. 5 will be described.
The water discharged from the discharge gate of the dam may contain earth and sand or dust. The extended bottom portion 15 of the discharge pipe 1 receives the weight of the door body 2 when the lip portion 20 is abutted when fully closed. For this reason, it is conceivable that such portions are worn or deformed by discharging water mixed with earth and sand or by being brought into contact with the lip portion 20 of the extended bottom portion 15 and receiving the weight of the door body 2. Therefore, when the abutted member 6 is worn or deformed, the fastening member 61 is removed, the abutted member 6 accommodated in the recess 15a of the extended bottom portion 15 is taken out, and a new impacted material made of an appropriate material is taken out. The joint member 6 can be accommodated in the recess 15a and replaced by fastening the fastening member 61.

  Next, still another embodiment of the present invention will be described with reference to FIG. In this embodiment, parts that are the same as or correspond to those in the above-described embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.

  In the embodiment described above, the lower watertight member 30 is provided on the lip portion 20 of the door body 2, whereas in this embodiment, the lower watertight member 35 is attached to and detached from the extended bottom portion 15 of the discharge pipe 1. It is provided as possible.

  The lip portion 20 ′ of the door body 2 in this embodiment does not need to be provided with the lower watertight member 30 as in the above-described embodiment, and the watertight member 3 is provided around the downstream opening 1 a of the conventional discharge pipe 1. The same thing as the case of the provided discharge gate is employable. Further, the lower watertight member 35 in this embodiment is formed in a plate shape having a trapezoidal cross section so that the width of the bottom surface (the left-right direction in FIG. 6) is larger than the width of the upper surface. The lower watertight member 35 can be made of an elastic material such as rubber, for example, as in the above-described embodiment. A recessed portion 15 b for accommodating the lower watertight member 35 is formed in a portion of the extended bottom portion 15 of the discharge pipe 1 where the lip portion 20 ′ is abutted. The upstream side wall of the recess 15 b is shaped to be inclined corresponding to the upstream side surface of the lower watertight member 35. A spacer 36 is housed in the recess 15b between the downstream side surface of the lower watertight member. The spacer 36 is formed in a tapered cross section whose upstream side wall is inclined corresponding to the downstream side wall of the lower watertight member 35, and its downstream side wall substantially corresponds to the downstream side wall of the recess 15 b. Molded vertically. The lower water-tight member 35 and the spacer 36 are accommodated in the recess 15b, the shaft portion of a fastening member 37 such as a bolt is inserted into the spacer 36, and the fastening member 37 is fastened to the extended bottom portion 15, thereby lowering the lower water-tight member 35. It can be fixed in the recess 15b. The depth of the recess 15b is set so that the surface of the extended bottom 15 and the upper surfaces of the lower watertight member 35 and the spacer 37 form the same plane in a state where the lower watertight member 35 and the spacer 36 are fixed therein. Yes.

  Next, the operation of the discharge gate of the dam in the embodiment described based on FIG. 6 will be described. First, in a state where the discharge gate 1 is fully closed, the door body 2 is lowered, and the lip portion 20 ′ is in contact with the lower watertight member 35 provided on the extended bottom portion 15. The watertightness between the two lip portions 20 ′ and the extended bottom portion 15 is maintained. This reliably prevents the water in the discharge pipe 1 from being inadvertently leaked. Further, since the lower watertight member 35 is provided on the extended bottom portion 15, the door body 2 having the conventional lip portion 20 ′ without the lower watertight member 35 can be employed. Further, when the upper surface of the lower watertight member 35 and the spacer 36 form the same surface as the upper surface of the extended bottom portion 15, when the water in the discharge pipe 1 is discharged by raising the door body 2, etc. Thus, since the water flow flowing out from the downstream opening of the discharge pipe does not collide with the water tight member provided around the bottom of the downstream opening of the discharge pipe, the lower watertight member 35 is damaged by the generated jet water flow. And the generation of vibrations can be prevented.

  When the lower watertight member 35 is worn or deformed due to the presence of earth or sand in the water to which the lip portion 20 'is abutted or discharged, the fastening member 37 is removed from the extended bottom portion 15 and the spacer 36 is removed. The lower watertight member 35 is taken out from the concave portion 15b, and the new lower watertight member 35 is accommodated in the concave portion 15b. Then, the spacer 36 is accommodated in the concave portion 15b again, and the fastening member 37 is replaced with the spacer 36. The lower watertight member 35 can be exchanged by inserting it into the base and fastening it to the extended bottom 15.

  The present invention is not limited to the case where the door body is a slide gate, and can be applied to other types of discharge gates such as a roller gate, a radial gate, and a tensile radial gate. When the door body is a roller gate, a roller is provided on the side portion of the door body, and a guide for receiving the roller is provided on the side portion of the downstream opening of the discharge pipe. Further, when the door body is a radial gate or a tensile radial gate, the downstream opening of the discharge pipe is formed in an arc shape according to the curvature of the door body constituting the radial gate or the tensile radial gate.

  Further, the present invention is not limited to the case where the water discharge pipe has a rectangular cross section, and may be applied to a discharge gate for opening and closing a downstream opening of a discharge pipe having another cross sectional shape such as an elliptical cross section. Can do.

  1: discharge pipe, 1a: downstream opening, 2: door body, 6: contacted member, 10: bottom part, 15: extension bottom part, 20: lip part, 20d: pressing part, 30: lower watertight member, 31: Side watertight member, 31c: lower end surface, 31d: inclined portion, 35: lower watertight member

Claims (5)

A discharge gate of a dam with a door body that opens and closes the downstream opening of the discharge pipe by moving up and down,
An extended bottom part extending the bottom part of the discharge pipe toward the downstream side so that the lip part at the lower end thereof is abutted when the door body is fully closed;
A side watertight member disposed between a side portion of the downstream opening of the discharge pipe and the door body, and having a lower end surface in contact with a bottom portion of the discharge pipe;
The side watertight member has an inclined portion that is inclined with respect to the opening / closing movement direction of the door body so that the side of the lower end portion that contacts the door body gradually expands toward the downstream side toward the lower end surface.
The lip portion has a pressing portion that engages with the inclined portion and presses the lower end surface against the bottom portion of the discharge pipe when the door body is fully closed. Gate.   The dam discharge gate according to claim 1, wherein a lower watertight member is provided on either the lip portion of the door body or the abutting portion of the extended bottom portion. The lower watertight member has a contact portion that is in contact with the side watertight member when the door body is fully closed and maintains watertightness between the lower watertight member and the side watertight member. The dam discharge gate according to claim 2 .   The lower watertight member is provided on the lip portion, and an abutted member with which the lower watertight member is abutted is detachably provided at an abutting portion of the extended bottom portion. The discharge gate of the dam according to any one of 3 above. 4. The discharge gate of a dam according to claim 2, wherein the lower watertight member is detachably provided at an abutting portion of the extended bottom portion.

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