JP2000345539A - Derricking gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance water sealing ability of a gate end surface and also make the maintenance easier. SOLUTION: Packings 10, 11 are provided in a length direction of the end surface of a derricking gate 1 to be installed in a river R and around a gate turning shaft 2, and the packings 10, 11 are in contact with the side surface of the water channel in the seal construction of the end surface of the derricking gate; the packing 10 of a portion subjected to an upstream water pressure around a turning shaft and in the length direction of the gate end surface has a Y-shaped cross section and a packing at a portion not subjected to the upstream water pressure around the turning shaft has a V-shaped cross section; and when jointing both packing together, the V-shaped packing 11 is butted to the Y-shaped packing 10 and they are adhered watertight. The packing 11 having a V-shaped cross section can be produced at a lower cost compared to the packing 10 having a Y-shaped cross section and when a bent lip 11a is directed to the water pressure side, it absorbs the swinging during gate derricking and a stable sealing effect can be maintained only by its bent-shaped deflection as same as that of the packing 10 having the Y-shaped cross section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an undulating gate installed in a waterway such as a river or a reservoir, and more particularly to a sealing structure for an end face of the gate.

[0002]

2. Description of the Related Art An undulating gate is often used as a flood control gate G for a river. This undulating gate G is an embodiment of the present invention as disclosed in Japanese Patent Publication No. 5-77805. Referring to FIG. 1 to FIG.
A gate (gate body) 1 is installed in a waterway R such as a river so as to cross the waterway R, and is undulated by a bearing E. A rotating shaft (undulating drive shaft) 2 is provided below the gate 1 from an end face. A structure is generally used in which the gate 1 is raised and lowered by rotating the rotation shaft 2 of the hydraulic cylinder 3 via the lever 4. In the figure, the arrow indicates the flow direction of water.

In this undulating gate G, conventionally, a waterway R
The water tightness between the side surface (side wall) W and the bottom surface is determined by providing a plate-like rubber (packing) 5 on the upstream side of the bottom surface of the water channel R over the entire length of the gate 1 as shown in FIG. 8), the rubber 5 is brought into contact with the semi-cylindrical portion 1a below the gate 1, and the side surface is shown in FIG.
As shown in FIG. 12A, the packing 6 is provided in the length direction of the end face of the gate 1, and the packing 6 is obtained by abutting the packing 6 on the channel side surface W.

[0004] Water sealing to the machine room D of the hydraulic cylinder 3 or the like through the penetrating portion of the rotating shaft 2 is performed by interposing packing around the rotating shaft 2 in the penetrating portion. General. In the above publication,
As shown in FIG. 12 (b), a packing 7 is provided around the rotation shaft 2 on the end surface of the gate 1, and the packing 7 is brought into contact with the channel side surface W to seal the water.

[0005]

The packing 6 in the end face length direction of the end face seal of the gate 1 is shown in FIG.
As shown in FIG. 2A, the bifurcated lip 6a has a Y-shaped cross section, and the forked lip 6a abuts obliquely on the channel side surface W. Maintain a stable sealing effect.

On the other hand, in the case of a water seal around the rotation axis of the rotation axis 2, an effective sealing effect can be obtained if a packing is interposed around the rotation axis in the through portion. However, in order to replace the packing due to deterioration, the rotating shaft 2 must be disassembled, and the operation is complicated.

Further, the packing 7 described in the above-mentioned publication is disclosed.
As shown in FIG. 12 (b), the bent piece 7a has an L-shaped cross section, and the entire surface of the bent piece 7a is in contact with the channel side surface W. Since the water seal by this full contact obtains the degree of pressure contact only by the compression bending in the thickness direction of the packing 7 (7a), the sealing effect is inferior to the pressure contact by the bending bending (lip effect) of the lip 6a of the packing 6 described above. In addition, it is difficult to follow a change in the gap between the end surface of the gate 1 and the side surface W of the water channel due to the swing of the gate 1, and the sealing property is easily deteriorated. Further, the gate 1 end face and the water channel side face W may face diagonally due to bending or twisting of the gate 1 at the time of rotation (undulation). Causes a decline. A decrease in the sealing property causes water leakage, and the water leakage travels along the rotating shaft 2 and enters the machine room D, causing a serious accident.

Further, since the packing 7 has a seamless annular shape as shown in FIG.
When maintenance such as replacement is performed due to deterioration or the like, it is necessary to disassemble the rotating shaft 2 because of its annular shape. The dismantling operation is complicated as described above, and the economic loss is large.

As shown in FIG. 11, the joint a between the packing 6 in the longitudinal direction and the packing 7 in the circumferential direction is formed by the packing 6 despite the high water pressure on the upstream side.
Since the end face of the joint abuts against the packing 7, the joint strength is low, and water leakage easily occurs from the joint due to aging.

[0010] The present invention has been made in consideration of the above points, and has as its object to improve water sealability and facilitate maintenance.

[0011]

In order to achieve the above-mentioned object, the present invention firstly follows the packing from the gate end face length direction to the packing around the rotation axis. The reason why they are continuous is to obtain a sealing property between both packings.

Next, the end of the packing around the rotation axis is water-tightly bonded to the packing in the length direction of the end face. In the case of the adhesive structure, when the packing is replaced, the packing can be removed without the adhesive portion, and a new one may be attached and the end thereof may be bonded. That is, there is no need to disassemble the rotating shaft portion. This means that the present invention can be applied to existing gates, the packing can be easily exchanged, and the economic effect is great.

At this time, the section from the longitudinal direction of the gate end surface to the portion receiving the upstream hydraulic pressure around the gate rotation axis is a section Y.
The packing may be shaped like a letter, and the portion around the gate rotation axis after that may be shaped like a rectangular cross section. The Y-shaped packing has a sufficient sealing property against high water pressure, and the rectangular packing has a bent lip (lip effect) when the bent lip is directed to the hydraulic pressure side.
As in the case of the letter-shaped packing, the sway at the time of gate undulation is absorbed to maintain a stable sealing effect.

The packing having a rectangular shape in cross section has a lower manufacturing cost and a higher lip effect than a Y-shaped packing. This is because the packing in the Y-shaped cross section has a smaller allowance when one of the lips bends, due to the presence of the other lip (due to protruding) than in the case where there is no other lip. By the way,
The portion of the packing having a rectangular cross section around the rotation axis does not receive the high water pressure on the upstream side, and it is sufficient to prevent the infiltration of the rebound water at the time of standing the gate and the water intrusion due to the submersion at the time of falling down.
Rigidity such as that of a letter is not required.

[0015] Incidentally, the packing having a rectangular cross section having a high lip effect is particularly effective in a structure in which the gate is cantilevered, as in the embodiment described later. If the cantilever is used, the bearings wear over time, the gate itself tilts, and the gap between the gate and the side wall increases. In addition, it is easy to perform actual matching at the time of replacement.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is as follows.
Packing is provided on the end face of the undulating gate installed in a waterway such as a river, in the lengthwise direction of the end face and around the gate rotation axis, and in the sealing structure of the undulating gate end face in which the packing abuts the side face of the waterway, the packing is The end portion around the gate rotation axis is water-tightly adhered to the length direction portion, and the gate is connected from the end surface length direction. The part around the rotation axis that receives the upstream water pressure is Y-shaped in cross section, and the subsequent part around the gate rotation axis is in a rectangular shape, and the Y-shaped packing is a bifurcated lip. Abuts against the side surface of the channel, and the lip bent outwardly around the rotation axis abuts against the side surface of the channel. Packing It may adopt a configuration that is watertight glued to grayed.

In this way, the sealing effect of the above-mentioned Y-shaped packing can be obtained, and the above-mentioned effect of the rectangular packing can be obtained. In addition, since both the packing in the end face length direction and a part of the packing around the rotation axis are different, the replacement of the packing is smooth as described above. The reason why the Y-shaped cross-section packing is subjected to the upstream water pressure is that the sealing performance of the Y-shaped cross-section packing is excellent, so that an effective sealing effect can be obtained even on the upstream side where the water pressure is high. However, as long as an effective sealing effect can be obtained, the position where the packing having the Y-shaped cross section is reached is arbitrary, and the packing may be formed in a cross-shaped cross section around the entire rotation axis. Even in the end face length direction,
Instead of the Y-shaped packing, a rectangular packing may be employed.

[0018]

1 to 9 show an embodiment. In this embodiment, as shown in FIG. 1, a gate (gate body) 1 is installed in a river R so as to cross the river, and the gate 1 is provided. Is supported by a bearing E provided at the bottom of the river with its lower edge so as to be able to move up and down. A rotating shaft 2 is provided from the lower part of one end surface of the gate 1.
Project laterally through the boss 2a, and the rotating shaft 2
As shown in FIG. 2, it extends to the machine room D through the side wall W of the river R, and is rotatably supported by the bearing 8. A hydraulic cylinder 3 is connected to an end of the rotation shaft 2 via a lever 4, and the rotation shaft 2 is rotated by the hydraulic cylinder 3 via the lever 4 to move the gate 1 up and down. In the figure, reference numeral 9 denotes a spoiler, which performs a function of preventing vibration of the gate 1.

In the lower part of the gate 1, a semi-cylinder 1a directed to the upstream side (right side in FIG. 1) is provided over the entire length in the width direction of the river R, and a packing 5 provided on the upstream river bottom in the semi-cylindrical portion 1a. Are pressed against each other to form a water seal (see FIG. 6). The packing 5 is bolted to a metal fitting 5a anchored to the river bottom as shown in FIG.
The lower end of the semi-cylindrical portion 1a does not protrude from the upper surface of the riverbed even when the gate 1 is turned down.
Always presses against the semi-cylindrical portion 1a to seal the upstream pressure.

At both ends of the gate 1, end plates 15 are provided.
As shown in FIG. 5, a packing 10 having a Y-shaped cross section is bolted to the outer surface of the end plate 15 from the upper end in the longitudinal direction to the lower part (see FIG. 3).
0 reaches the end position of the semi-cylindrical part 1a. On the outer surface of the end plate 15 around the rotation axis 2 at the end face of the gate 1 from which the rotation axis 2 protrudes, a cross-shaped packing 11 is connected to the packing 10 and the tip of the packing 11 is in the longitudinal direction. Packing 10 has been reached. This packing 1
As shown by a chain line in FIG. 10 (b), 1 has its both ends abutted against the packing 10 and is adhered so as to be strongly connected. The two packings 10, 11 are bolted or screwed via stopper plates 10b, 11b as shown in FIG.

As shown in FIG. 7, the rotary shaft 2 is integrated with the gate 1 via the key 12 and penetrates the river wall W.
1 and the packing 13 on the machine room D side.

In this embodiment, the pivot shaft 2 is provided only at one end of the gate.
In this case, the present invention can be applied to a cantilever type in which the pivot shafts 2 are provided at both ends of the gate. At this time, the configuration of the present invention (FIG. 5) is formed on both gate end faces.

[0023]

According to the present invention, the water sealing of the end face of the gate is performed by packing continuously around the rotation axis from the longitudinal direction, so that the sealing effect is high. On the other hand, the tip is adhered, so that replacement is easy. Further, the packing having a Y-shaped cross section and a rectangular cross section can smoothly follow the torsion of the gate and obtain an effective sealing effect.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment.

FIG. 2 is a cutaway front view of the same.

FIG. 3 is a plan view of a partially cut-out central notch.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a sectional view taken along line BB of FIG.

FIG. 6 is a sectional view taken along the line CC of FIG.

FIG. 7 is an enlarged sectional view of a main part of FIG. 2;

FIG. 8 is an enlarged view of a main part of FIG. 5;

FIG. 9 is a partial perspective view of the packing.

10 shows a sectional view of each packing in FIG. 5,
(A) is AA line, (b) is BB line, (c) is CC
line

FIG. 11 is a sectional side view of a conventional example.

12 shows a cross-sectional view in FIG. 11, wherein (a) is A-
A line, (b) is BB line

[Explanation of symbols]

 D Machine room G Undulating gate R River (water channel) W River side wall (water channel side) 1 Gate 1a Semi-cylindrical part 2 Rotating shaft 3 Hydraulic cylinder 10 Y-shaped packing 10a Lip 11a L-shaped packing 11a Lip 15 End plate

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akira Takei 1806 Kakizaka, Yabakei-cho, Shimoge-gun, Oita Prefecture 6 Kyushu Regional Construction Bureau, Ministry of Construction, Yamakunigawa Dam and Weir Integrated Management Office (72) Inventor ▲ High ▼ Seiji No. 1-1-1, Mizobori, Nogata City, Fukuoka Prefecture Inside the Ongagawa Construction Office, Kyushu Regional Construction Bureau, Ministry of Construction (72) Inventor Yukio Eikawa 1-12-1 Kitahorie, Nishi-ku, Osaka City Kurimoto Iron Works Co., Ltd. In-house F term (reference) 2D019 CA11 EA03

Claims (2)

[Claims] 1. Packings 10 and 11 are provided on the end face of an undulating gate 1 installed in a water channel R such as a river, in the length direction of the end face and around the gate rotation axis 2, and the packing 1 is provided.
A sealing structure for an end surface of an undulating gate in which 0, 11 abuts on a channel side surface W, wherein the packings 10, 11 are continuous around the gate rotation axis 2 from the length direction of the end surface, and the gate thereof. A sealing structure for an end face of an undulating gate, wherein an end portion around the rotation shaft 2 is water-tightly adhered to the lengthwise portion. 2. The packing 10, 11 has a Y-shaped cross section from the lengthwise direction of the end face to a portion receiving the upstream hydraulic pressure around the gate rotation axis. The portion is formed of a letter-shaped cross section 11, and its Y-shaped packing 10 has a bifurcated lip 10a abutting on the channel side surface W, and the letter-shaped packing 11 is bent outward around the rotation axis. 2. The undulation according to claim 1, wherein the lip 11 a contacts the channel side surface W, and both ends in the longitudinal direction of the packing 11 are water-tightly bonded to the packing 10. 3. Gate end face sealing structure.