JP7148351B2 - Corner drop - Google Patents

Description

TECHNICAL FIELD The present invention relates to a corner drop suitable for use in a seawater intake channel of a thermal power plant or the like.

In thermal power plants and nuclear power plants, seawater intake channels are laid for taking in seawater for cooling.

In the seawater intake channel, the seawater cutoff plate is usually lifted by a crane and pulled out from the seawater intake gate to take in seawater. It is suspended by crane operation and inserted into the seawater intake gate to dam seawater.

In addition, after the completion of inspection and cleaning of the seawater intake channel, the square dropper is pulled out to open the seawater intake gate for water filling. cannot be lifted easily.

Therefore, the initial water filling after the inspection and cleaning of the seawater intake channel is completed. I'm trying to pull out the whole thing.

In addition, in Patent Document 1 below, a water filling gate ( A corner drop structure is disclosed in which a closing member) is provided.

JP-A-11-158846

However, it takes about a day to fill the seawater intake channel with seawater when the corner dropper is slightly pulled out. there was a problem.

It should be noted that the structure of the corner drop disclosed in the above-mentioned Patent Document 1 is based on the premise that it is used for damming water channels such as sewerage facilities and agricultural waterway facilities. By opening the water filling gate provided at the bottom and letting the water flow out, the state where water pressure is not acting on the entire corner drop including the water filling gate (the state where the entire corner drop is exposed to the air or the corner drop is exposed to the air) Since it is designed so that it can be hoisted appropriately in a state where only the lower end is submerged), water pressure acts on the entire corner drop including the water filling gate when seawater is filled (the entire corner drop is flooded). There is a problem that it is difficult to apply to the corner drop used for the seawater intake channel that becomes the state).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a corner dropper capable of ensuring safety when seawater is filled into a seawater intake channel.

The corner dropper of the present invention is inserted into a seawater intake gate to dam seawater taken into a seawater intake channel, wherein the seawater intake is performed when the corner dropper is pulled out from the seawater intake gate. a corner drop door body provided at the upper end so that a water conduit for eliminating the differential pressure between the front and back surfaces of the corner drop by spreading the seawater in the passage for a predetermined time penetrates from the surface to the back; A water filling gate provided with a door body attached to the upper end of the surface of the corner drop door body for completely exposing or completely blocking the entrance side opening of the water conduit; and the corner drop door. and a sheave attached below the water filling gate on the upper end of the body surface, the water filling gate having one end attached to the upper end of the door body and pulling up the door body. a gate opening wire for completely exposing the inlet side opening of the water conduit, and a wire passed through the sheave and having one end attached to the lower end of the door, and pulling down the door and a gate closing wire for completely closing the inlet side opening of the water conduit.
Here, the water conduit may be provided at a position where the water level is lower than the normal sea level when the sea water is dammed up by the corner drop.
The water filling gate further includes the rectangular plate-shaped door body and a pair of guides attached to the corner-removed door body so as to face each other with the door body interposed therebetween. When the end is lifted, the door is lifted while being guided by the pair of guides, the entrance side opening of the water conduit is completely exposed, and the other end of the gate closing wire is lifted. , even if the one end of the gate closing wire is pulled down by the sheave, the door body is guided by the pair of guides and pulled down, and the entrance side opening of the water conduit is completely closed. good.
The diameter of the water conduit may be such that the seawater intake channel can be filled with water in about 12 hours when the inlet side opening is completely exposed.
The corner drop (10) is divided into three parts, the corner drop door body (11), the middle corner drop door body (12), and the lower corner drop door body (13). The water conduit is provided so as to penetrate from the front surface to the back surface of the upper end of the upper corner drop door body, and the water filling gate is attached to the surface of the upper corner drop door body. The sheaves (30R, 30L) may be attached below the water filling gate on the surface of the upper stepped door body.
As the water conduit, right and left water conduits (14R, 14L) are provided so as to penetrate the upper section corner drop door body from the front surface to the back side, and the water filling gate is provided on the surface of the upper stage corner drop door body. right and left water filling gates (20R, 20L) attached to the upper section, and as said sheaves, right and left water filling gates ( 30R, 30L).
The right and left water filling gates are attached to the right and left rectangular plate-shaped right and left door bodies (21R, 21L) and to the upper stepped door body so as to face each other across the right and left door bodies. A pair of right and left guides (22R, 22L), one end of which is attached to the upper end of said right and left door bodies, and raises said right and left door bodies to the inlet side of said right and left water conduits. Right and left gate opening wires (23R, 23L) for completely exposing the openings, respectively, passed through the right and left sheaves and one end attached to the lower end of the right and left door bodies, Further, right and left gate closing wires (24R, 24L) may be provided for pulling down the right and left door bodies to completely block the entrance side openings of the right and left conduits, respectively.
The diameters of the right and left conduits may be set to such a size that the seawater intake channel can be filled with water in about 12 hours when both inlet side openings are completely exposed.

The corner dropping of the present invention has the following effects.
(1) By pulling up the gate opening wire to open the water filling gate and completely exposing the entrance side opening of the water conduit, seawater can be filled in the seawater intake channel without lifting the corner drop. It is possible to ensure safety when filling seawater inside.
(2) Even if the water filling gate is submerged in seawater, the water filling gate can be closed by pulling up the gate closing wire. Therefore, the water pipe can be completely closed at the entrance side opening and then the corner drop can be pulled out. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the corner dropper 10 by one Example of this invention, (a) is a front view which shows the structure of the corner dropper 10, (b) is a right water filling when the right door body 21R is closed. 20C is a front view showing the state of the water filling gate 20R, and (c) is a front view showing the state of the right water filling gate 20R when the right door body 21R is opened. FIG. FIG. 5 is a front view showing the configuration of a corner dropper 50 according to a modification of the present invention;

For the above purpose, a water conduit is provided at the upper end of the corner drop door, and if the gate opening wire is pulled up, the water filling gate can be opened to completely expose the entrance side opening of the water conduit and pass it through the sieve. This was achieved by pulling up the gate closing wire to close the water filling gate and completely block the entrance side opening of the water conduit.

An embodiment of corner removal of the present invention will be described below with reference to the drawings.
The corner dropper of the present invention has the following features.
(1) Considering that it takes about 12 hours to fill the seawater intake channel with water without any problem, a water conduit is provided at the upper end of the corner drop door, and the water filling gate is opened with a gate opening wire to guide the water. Seawater is put into the seawater intake channel from the water pipe for about 12 hours, and after eliminating the differential pressure between the front and back surfaces of the corner drop, the corner drop is pulled out.
(2) By pulling up the gate closing wire passed through the sheave to close the water filling gate and completely block the entrance side opening of the water conduit, the water filling gate can be completely closed even if water pressure is acting. do.

As shown in FIG. 1(a), the corner drop 10 according to one embodiment of the present invention has three corner drop doors: an upper corner drop door 11, a middle corner drop door 12, and a lower corner drop door 13. It is of the divided thirds type.
Note that the upper corner cut-off door 11, the middle cut-off door 12 and the lower cut-off door 13 are rectangular plates of about 5 m wide by 4.8 m long.

Cylindrical right and left water conduits 14R and 14L are provided at the right and left ends of the upper stage drop door 11. When the seawater is dammed by the drop 10, the sea level (tide level) becomes lower than the normal sea level. It is provided so as to penetrate from the front surface to the back surface of the upper stage corner drop door body 11 at the position.
The diameters of the right and left conduits 14R and 14L are large enough to fill the seawater intake channel with water in about 12 hours when both the inlet side openings of the right and left conduits 14R and 14L are completely exposed. (for example, about 20 cm).

A pair of hoisting fittings 15 for lifting or suspending the upper stage corner drop door body 11 by crane operation is attached to the upper surface of the upper stage corner drop door body 11.例文帳に追加
In addition, although not shown, the middle corner drop door 12 and the lower corner drop door 13 are also lifted or hung on the upper surfaces of the middle corner drop door 12 and the lower corner drop door 13 by crane operation. A pair of hanging brackets are attached for

Right and left water filling gates 20R and 20L are attached to the right and left end portions of the surface of the upper stage corner drop door 11, and the right and left sheaves 30R and 30L are attached to the right and left water filling gates 20R and 20L. mounted below.

As shown in FIG. 1B, the right water filling gate 20R is opposed to a right door body 21R (about 1 ton in weight) having a rectangular plate shape of about 25 cm in width and 25 cm in length, with the right door body 21R interposed therebetween. A pair of right guides 22R attached to the upper step corner drop door body 11 so as to do so, a right gate opening wire 23R, and a right gate closing wire 24R are provided.

An upper right wire attachment member 21aR for attaching one end of a right gate opening wire 23R is fixed to the central portion of the upper end of the right door body 21R.
A lower right wire attachment member 21bR for attaching one end of the right gate closing wire 24R is fixed to the center of the lower end of the right door body 21R.

The pair of right guides 22R are pulled up to the upper stopper by the right gate opening wire 23R, and in a state in which the right door body 21R is opened, the opening on the inlet side of the right conduit 14R is completely exposed, and the right gate is closed to the lower stopper. When the right door body 21R is pulled down by the wire 24R and the right door body 21R is closed, the length is such that the entrance side opening of the right conduit 14R is completely closed.
Right guide grooves into which both ends of the right door body 21R are inserted are formed in the side surfaces of the pair of right guides 22R facing each other.

The direction of the right gate closing wire 24R is changed from downward to upward by passing through the right sheave 30R.

As a result, when the other end of the right gate opening wire 23R is attached to the lever block (registered trademark) and the right gate opening wire 23R is pulled up, the right door body 21R is guided by the pair of right guides 22R to reach the upper stopper. Since it is pulled up, the entrance side opening of the right conduit 14R can be completely exposed (see FIG. 1(c)).
When the other end of the right gate closing wire 24R is attached to the lever block (registered trademark) and the right gate closing wire 24R is pulled up, the right door body 21R is guided by the pair of right guides 22R to reach the lower stopper. Since it is pulled down, it is possible to completely block the inlet side opening of the right conduit 14R (see FIG. 1(b)).

Similarly, although not shown, the left water filling gate 20L is opposed to a rectangular plate-shaped left door body 21L (weight of about 1 ton) of about 25 cm wide by 25 cm long with the left door body 21L interposed therebetween. A pair of left guides 22L attached to the corner-off door body 11, a left gate opening wire 23L, and a left gate closing wire 24L are provided.

An upper left wire attachment member 21aL for attaching one end of the left gate opening wire 23L is fixed to the central portion of the upper end of the left door body 21L.
A lower left wire attachment member 21bL for attaching one end of the left gate closing wire 24L is fixed to the center portion of the lower end of the left door body 21L.

The pair of left guides 22L are pulled up to the upper stopper by the left gate opening wire 23L, and in a state in which the left door body 21L is opened, the opening on the inlet side of the left conduit 14L is completely exposed, and the left guide 22L is pulled up to the lower stopper to close the left gate. When the left door body 21L is pulled down by the wire 24L and the left door body 21L is closed, the length is such that the entrance side opening of the left conduit 14L is completely closed.
Left guide grooves into which both ends of the left door body 21L are respectively inserted are formed in the side faces of the pair of left guides 22L facing each other.

The direction of the left gate closing wire 24L is changed from downward to upward by passing through the left sheave 30L.

As a result, when the other end of the left gate opening wire 23L is attached to the lever block (registered trademark) and the left gate opening wire 23L is pulled up, the left door body 21L is guided by the pair of left guides 22L to reach the upper stopper. Since it is pulled up, the entrance-side opening of the left conduit 14L can be completely exposed.
When the other end of the left gate closing wire 24L is attached to the lever block (registered trademark) and the left gate closing wire 24L is pulled up, the left door body 21L is guided by the pair of left guides 22L to reach the lower stopper. Since it is pulled down, the entrance side opening of the left water conduit 14L can be completely blocked.

Next, how to use the corner dropper 10 will be described.
When damming up the seawater for inspection, cleaning, etc. of the seawater intake channel, a worker suspends the lower corner drop door 13, the middle corner drop door 12 and the upper corner drop door 11 in this order by operating a crane to remove the seawater. Insert it into the intake gate.

At this time, the upper stage corner drop door 11 is inserted while completely closing the right and left door bodies 21R and 21L of the right and left water filling gates 20R and 20L. is caught on something and the right or left door bodies 21R, 21L are pulled upward, and the right or left door bodies 21R, 21L open even slightly, seawater passes through the right or left door bodies 21R, 21L and seawater is taken in. It leaks out onto the road.
However, when the worker notices that the seawater is leaking into the seawater intake channel through the right or left gate bodies 21R, 21L, the worker pulls the other end of the right or left gate closing wire 24R, 24L to the lever. Leakage of seawater can be stopped by attaching it to a block (registered trademark) and pulling up the right or left gate closing wires 24R, 24L to completely close the right or left door bodies 21R, 21L.
In addition, in the structure of the corner dropping disclosed in the above-mentioned Patent Document 1, when used for the seawater intake channel, the right and left gate closing wires 24R and 24L are not provided, and the right and left door bodies Since 21R and 21L are pressed by seawater toward the upper corner drop door 11, they do not fall under their own weight.

After that, when the inspection and cleaning of the seawater intake channel are completed, the worker attaches the other ends of the right and left gate opening wires 23R and 23L to the lever block (registered trademark) in order, and attaches the right and left gate opening wires. By pulling up 23R and 23L and completely opening the right and left door bodies 21R and 21L, seawater is filled in the seawater intake channel for about 12 hours.

Thereafter, the operator lifts the upper corner drop door 11, the middle corner drop door 12 and the lower corner drop door 13 in this order by crane operation and pulls them out from the seawater intake gate.

At this time, the operator attaches the other ends of the right and left gate closing wires 24R, 24L to the lever block (registered trademark) in order, pulls up the right and left gate closing wires 24R, 24L, and pulls the right and left gate closing wires 24R, 24L. After completely closing 21R and 21L, the upper stage corner drop door 11 is pulled out.
As a result, when the right and left door bodies 21R and 21L are completely opened and the upper stage corner drop door 11 is pulled out, the right and left door bodies 21R and 21L move toward the upper stage corner drop door 11 side by seawater when they are in the sea. Since it is kept open because it is pressed, there is a risk that it will fall due to its own weight and be damaged when it comes out of the sea, but this can be prevented.
It should be noted that, in the structure of the square dropper disclosed in the above-mentioned Patent Document 1, in a state where water pressure is not acting on the water filling gate (that is, in the air), multiple stages of the square dropper are appropriately lifted. Since the water filling gate attached to the water filling gate will always close by its own weight, it is not necessary to assume that the bottom water filling gate will be lifted up while the water filling gate is completely open.

Also, since the right and left water filling gates 20R and 20L are attached to the upper corner drop door 11, the right and left gate opening wires 23R and 23L and the right and left gate closing wires 24R and 24L are cut off in the middle step. It does not become an obstacle when pulling out the door 12 and the lower stage corner drop door 13.例文帳に追加
In addition, in the corner drop structure disclosed in Patent Document 1, since the right and left water filling gates 20R and 20L are attached to the lower corner drop door 13, the right and left gate opening wires 23R and 23L are attached. There is a problem that the right and left gate closing wires 24R and 24L interfere with the pulling out of the upper stage corner drop door 11 and the middle stage corner drop door 12.例文帳に追加

In the above, the three-part type corner dropper 10 has been described, but like the corner dropper 50 shown in FIG. Cylindrical right and left water conduits 52R and 52L are provided at the right and upper left ends of the corner-removing door 51 so as to penetrate from the surface to the back of the corner-removing door 51, and the right side of the surface of the corner-removing door 51. And right and left water-filled gates 20R, 20L and right and left sheaves 30R, 30L may be attached to the upper left end.

In a seawater intake channel of a scale that can fill the seawater intake channel with water in about 12 hours with a single water conduit, the water conduit is installed at the center of the upper corner drop door 11 or at the upper end center of the corner drop door 51 . , and a water-filled gate and a sheave may be attached to the central portion of the surface of the upper stage corner drop door member 11 or the upper end central portion of the surface of the corner drop door member 51 .

10 Corner drop 11 Upper corner drop door 12 Middle corner drop door 13 Lower corner drop door 14R, 14L Right and left conduit 15 Hanging metal fittings 20R, 20L Right and left water filling gates 21R, 21L Right and left door 21aR , 21aL right and left upper wire attachment members 21bR, 21bL right and left lower wire attachment members 22R, 22L right and left guides 23R, 23L right and left gate opening wires 24R, 24L right and left gate closing wires 30R, 30L right and left sheave 50 corner drop 51 corner drop door body 52R, 52L right and left water conduit 53 lifting fitting

Claims (8)

A corner drop for damming seawater to be inserted into the seawater intake gate and taken into the seawater intake channel,
A water conduit penetrates from the front surface to the back surface for eliminating the differential pressure between the front and back surfaces of the corner drop by filling the seawater in the seawater intake channel for a predetermined time when the corner drop is pulled out from the seawater intake gate. a corner drop door provided at the upper end so as to
a water-filling gate provided with a door attached to the upper end of the surface of the corner-off door and for completely exposing or completely blocking the entrance-side opening of the water conduit;
and a sheave attached below the water filling gate on the upper end of the surface of the corner drop door body,
The water filling gate is
a gate-opening wire, one end of which is attached to the upper end of the door, for pulling up the door and completely exposing the entrance-side opening of the water conduit;
a gate closing wire passed through the sheave and having one end attached to the lower end of the door for pulling down the door to completely block the entrance side opening of the water conduit; ,
Kakuotoshi, characterized by: 2. The water pipe according to claim 1, characterized in that said water conduit is provided at a position lower than the normal sea level when sea water is dammed by said water drop. The water filling gate is
the rectangular plate-shaped door body;
further comprising a pair of guides attached to the corner drop door so as to face each other across the door,
When the other end of the gate opening wire is pulled up, the door is guided by the pair of guides and pulled up to completely expose the entrance side opening of the water conduit,
When the other end of the gate-closing wire is pulled up, the one end of the gate-closing wire is pulled down by the sheave, so that the gate body is guided by the pair of guides and pulled down to move the water pipe. The entrance side opening of is completely blocked,
3. The corner scraper according to claim 1 or 2, characterized in that: 4. Any one of claims 1 to 3, characterized in that the diameter of the water conduit is such that the seawater intake channel can be filled with water in about 12 hours when the inlet side opening is completely exposed. Crab cut corners. The corner drop (10) is divided into three parts, the corner drop door body (11), the middle corner drop door body (12), and the lower corner drop door body (13). is a
The water conduit is provided so as to penetrate from the front surface to the back surface at the upper end portion of the upper stage corner drop door body,
The water-filling gate is attached to the surface of the upper corner drop-off door body,
The sheaves (30R, 30L) are attached below the water filling gate on the surface of the upper stepped door.
5. The corner scraper according to any one of claims 1 to 4, characterized in that: As the water conduit, right and left water conduits (14R, 14L) are provided so as to penetrate the upper stage corner drop door body from the front surface to the back surface,
As the water filling gates, right and left water filling gates (20R, 20L) attached to the surface of the upper section corner drop door body are provided,
As the sheaves, right and left sheaves (30R, 30L) are attached respectively below the right and left water filling gates on the surface of the upper stage corner drop door body,
6. The corner scraper according to claim 5, characterized in that: The right and left water filling gates are
the rectangular plate-like right and left door bodies (21R, 21L);
a pair of right and left guides (22R, 22L) attached to the upper stepped door members so as to face each other with the right and left door members therebetween;
Right and left gates, one end of which is attached to the upper end of said right and left door bodies, and for raising said right and left door bodies to fully expose the inlet side openings of said right and left conduits respectively. opening wires (23R, 23L);
passed through the right and left sheaves and having one end attached to the lower end of the right and left door bodies, and pulling down the right and left door bodies to open the inlet side openings of the right and left conduits; right and left gate closing wires (24R, 24L) for completely blocking each,
7. The corner dropper according to claim 6, characterized in that: The diameters of the right and left water conduits are set to a size such that the seawater intake channel can be filled with water in about 12 hours when both of the inlet side openings are completely exposed. Item 6 or 7. Cut corners according to item 6 or 7.

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