KR101119192B1 - A prevention apparatus of rain and sand inflow for storm overflow chamber - Google Patents

Abstract

The present invention relates to a rainwater toil and rainwater inlet prevention device, and facilitates the opening and closing of the opening and closing plate through the water break bar, the position of the opening and closing plate and the horizontal holding stopper according to the average amount of sewage, and also the opening means After a certain time has elapsed after the opening and closing plate is closed, the interior of the stormwater chamber becomes a vacuum state, and even if the water level of the sewage is less than three times, the problem of not being opened is improved.

Rainwater soil, sewer, drainage, stopper, opening and closing board, contaminants, earth and sand

Description

A PREVENTION APPARATUS OF RAIN AND SAND INFLOW FOR STORM OVERFLOW CHAMBER}

The present invention is a frame seated in one or more sewage inlet hole formed in the rainwater toil provided on the discharge side of the sewage and the separator is installed on the upper surface; and coupled across the inside of the frame along the transverse direction of the sewage inlet Rotation shaft; And, the opening and closing plate is installed on the rotating shaft, the opening and closing plate for opening and closing the sewage inlet hole according to the amount of sewage; The present invention relates to a rainwater discharge system and rainwater inflow prevention device composed of an open stopper capable of controlling an opening angle. More specifically, the opening and closing plate has a plurality of recessed grooves zigzag to facilitate the inflow of sewage to the other side. Is formed to be continuous, and configured to be easy to open after closing through a pair of opening means attached to one inner surface of the frame It relates to rainwater and stormwater inlet prevention device characterized in that rainwater.

In general, sewerage refers to the household sewage generated in homes, factory wastewater from factories or workplaces, and the passageway through which rainwater drains sewage collected through road drains.

In particular, the sewer flows into the river because the discharge side is connected to the river.

That is, a conventionally known sewage furnace includes rainwater silos to purify the sewage flowing into the discharge side, and includes a sewer drainage leading to a sewage treatment plant through a connection pipe connected to rainwater sills.

At this time, one or more sewage inflow holes are formed in the rainwater discharge chamber, and the sewage inflow prevention device is provided in the sewage inflow hole. In addition, the soil inflow prevention device is configured to further install a screen net to prevent foreign matters such as contaminants from flowing into the superior soil chamber.

Meanwhile, the conventional soil inflow prevention device guides the sewage flowing into the sewage drainage to the sewage sewage treatment plant, and when the amount of sewage increases more than three times due to rainwater, the rainwater sediment is closed and discharged to the river or river.

In order to control the amount of sewage inflow according to the change of the average amount of sewage, the position of the opening and closing plate and the horizontal holding stopper should be changed. There was a problem to assemble.

In addition, the position adjustment of the opening and closing plate is to remove the frame from the sewage inlet hole, separate the rotating shaft from the frame again, change the position of the rotating shaft to adjust the position of the opening and closing plate, and reconstruct the frame in the sewage inlet hole there was.

This is because the bearing bracket coupled to the end of the rotating shaft is fixed to the outer surface of the frame, so when the position of the opening and closing plate is changed, the frame must be separated from the sewage inlet hole.

In addition, in the related art, when the amount of rainwater is reduced and the water level of the sewage amount is three times or less, the opening and closing plate must be opened again by its own weight.

The present invention has been made in view of the above problems, an object of the present invention is to smoothly open and close the opening and closing plate through the water break bar, and to change the position of the opening and closing plate and the horizontal maintenance stopper according to the average amount of sewage, In addition, after a certain period of time after the opening and closing plate is closed through the opening means, the stormwater inside the stormwater chamber is in a vacuum state, and even if the water level of the sewage is less than 3 times, the stormwater and stormwater inflows of stormwater soils are improved. It is to provide a prevention device.

Rainwater toil and sediment inflow prevention device according to an embodiment of the present invention for achieving the above object is seated in at least one sewage inlet hole formed in the rainwater toil provided on the discharge side of the sewage and separated on the upper surface Frame is installed; And, the rotating shaft coupled across the frame in the transverse direction of the sewage inlet hole; And, the opening and closing plate arranged on the rotating shaft, opening and closing the sewage inlet hole according to the amount of sewage; And, In the rainwater toil and earth and sand inflow prevention device comprising a horizontal holding stopper coupled to the other side of the frame to control the closed state of the opening and closing plate, and an open stopper to control the opening angle of the opening and closing plate,

The opening and closing plate, a plurality of recessed grooves are continuously formed in a zigzag to facilitate the inflow of sewage on the other side, and is configured to be easy to open after closing through a pair of opening means attached to one inner surface of the frame. It is characterized by.

Preferably, the opening and closing plate is configured to be attached to the buoyancy cylinder on the other side bottom.

Preferably, the other side upper surface of the opening and closing plate is further provided with a water inlet control plate for opening and closing the recessed groove.

It is preferable that the center of gravity control plate 38 for adjusting the center of gravity of the opening and closing plate on one side upper surface of the opening and closing plate.

" 형상의 물끊기바가 더 설치되는 것이 바람직하다.In the center of the upper surface of the opening and closing plate one side forms a vertical plane, the other side forms an inclined surface "

It is preferable that the water-shaped bar is further installed.

In the horizontal maintenance stopper, a plurality of long grooves are further formed to control the amount of sewage inflow according to the amount of sewage and the amount of rainwater. When the plate is closed, it is preferable that the water inlet blocking frame is coupled to prevent water inflow into the sewage inlet hole.

The opening means is installed in a pair symmetrical mutually, a support rod is installed in the longitudinal direction on one side of the inner surface of the frame, a bearing bracket including a bearing coupled to the end of the support rod, and installed in the bearing bracket in the transverse direction It is preferably composed of an opening rod, a roller coupled to the outer end of the opening rod and in close contact with the bottom of the opening and closing plate, and a weight coupled to the inner bottom of the opening rod.

In one side of the inner surface of the frame is further provided with a stopper rod for intermittent opening angle of the opening rod, the stopper rod is inclined angle of each opening rod through a plurality of coupling holes formed at a height difference on one inner surface of the frame It is preferable to be configured to adjust.

According to the rainwater and rainwater inflow prevention device of rainwater soil according to the present invention, after the switchboard is closed, the inside of the rainwater soil chamber is in a vacuum state so that the switchboard does not open, forcibly lifting the switchboard through the opening means so that the switchboard does not open. There is a feature that can be prevented.

In addition, the opening stopper is arranged to be elevated in the lower part of the opening and closing plate, and the sub support frame is also coupled to the cantilever shape along the inner longitudinal direction of one side so as to be located at the central portion of the opening and closing plate so that sewage contaminants are caught on the opening stopper so that the opening and closing plate is not closed. There is a feature that can prevent the problem.

In addition, when the average amount of sewage is adjusted, the sewage inflow can be adjusted by easily changing the position of the rotary shaft attached to the bottom of the opening and closing plate and the position of the horizontal maintenance stopper coupled to the frame.

In addition, there is an advantage that can smoothly open and close the operation of the switchboard through the water break bar.

Hereinafter will be described in detail with the accompanying drawings with respect to rainwater and soil inflow prevention device of rainwater soil according to the present invention.

1 is a perspective view showing a state of rainwater toil and sediment inflow prevention device installed in accordance with an embodiment of the present invention, Figure 2 is an enlarged view of the rainwater toil and sediment inflow prevention device extracted from Figure 1, 3 is a perspective view illustrating a separated state of the opening and closing plate and the horizontal holding stopper in FIG. 2, and FIG. 4 is a cross-sectional view taken along line AA of FIG. 2.

As shown in Figures 1 to 4, the present invention is provided on the discharge side of the sewer (8) and is installed in the stormwater chamber 81 including one or more sewage inlet hole 811, the stormwater chamber 81 ) Is connected to the sewer conduit 82 associated with the sewage treatment plant (not shown) through the connecting pipe 82, in particular in rainy season to prevent rainwater and earth and sand to enter the sewage inlet hole 811 It relates to rainwater and earth and sand inflow prevention device.

The rainwater and sediment inflow prevention device of rainwater soil can change the position of the opening and closing plate (3) and the horizontal holding stopper (4) according to the average amount of sewage, and also after a certain time after the closing plate (3) is closed It is a device that improves the problem that the inside of the rainwater chamber 81 is in a vacuum state and the opening and closing plate 3 does not open even when the water level of the sewage amount is 3 times or less.

Rainwater and sediment inflow prevention device of the rainwater toil is composed of six parts, which is installed in the sewage inlet hole 811 and the separator 13 is installed on the upper surface and the frame (1) A rotating shaft (2) installed on the rotating shaft (2), an opening / closing plate (3) fixed to the rotating shaft (2) and opened and closed, and a horizontal holding stopper (4) provided on the frame (1) to control the horizontality of the opening / closing plate (3). And, it is composed of the height adjusting means 6 to control the opening angle of the opening and closing plate (3).

The rotation shaft 2 is coupled across the inside of the frame 1 along the transverse direction of the sewage inlet hole 811.

In addition, the opening and closing plate 3 is arranged on the rotary shaft 2, and functions to open and close the sewage inflow hole 811 according to the amount of sewage and rainwater.

Meanwhile, the rotating shaft 2 is fixed to both inner sides of the frame 1 through bearing brackets BB coupled to both ends thereof so as to be rotatable. Through this structure, the opening and closing plate 3 is provided with a structure that can be opened and closed by rotating together with the rotation shaft (2).

In addition, the opening and closing plate 3 has a structure in which one or more front weights 31 and rear weights 32 are further provided on one lower side and the other lower side.

Here, the front and rear weights 31 and 32 are vertically fastened to the nut 3a having a stepped hole in the longitudinal direction and the nut 3a, and the front and rear weights are adjusted about the rotating shaft 2 by adjusting the front and rear positions. It consists of the spiral weight 3b which changes the fall weight of front and rear.

Through such a configuration, it is configured to determine the direction of opening by its own weight by adjusting the weight of the opening and closing plate 3 in accordance with the sewage and rainwater.

In addition, the opening and closing plate (3) is a structure that can be changed in position with respect to the frame (1) to adjust the amount of sewage inflow according to the average amount of sewage and rainwater.

To this end, the frame 1 further includes a support bracket 12 having a long groove H for adjusting the position of the bearing bracket BB such that the position of the rotation shaft 2 is variable.

The support bracket 12 is fixed to both inner side surfaces of the frame 1, and has a structure in which a bearing bracket BB coupled to both ends of the rotation shaft 2 is fixed on the long groove H.

In addition, the frame 1 is a structure that is further provided with a sub-support frame 11 coupled in a cantilever shape along one inner longitudinal direction to be located in the central portion of the opening and closing plate (3).

The sub support frame 11 is for preventing the deflection of the rotation shaft 2, the bearing bracket (BB) arranged on the rotation shaft 2 is fixed to the upper surface, to change the position of the bearing bracket (BB) The long groove (H) is formed for.

Accordingly, when the position of the opening and closing plate 3 is changed, the long groove H and the sub support frame 11 of the support bracket 12 are not separated from the frame 1 in the sewage inlet hole 811. It is possible to move on the long groove (H) of.

In addition, the opening and closing plate 3 has a structure in which a plurality of recessed grooves 36 are continuously formed in zigzag to facilitate the inflow of sewage to the other side.

At this time, the other side surface of the opening and closing plate 3 is further provided with a water inlet control plate 37 for opening and closing the recessed groove 36. The water inlet control plate 37 is formed with a long groove (H) is formed so that the position can be changed in the upper surface of the opening and closing plate (3).

This structure is a structure that can adjust the amount of sewage flowing through the recessed groove 36 of the opening and closing plate 3 by adjusting the position of the water inlet control plate 37.

In addition, the one side upper surface of the opening and closing plate 3 is a structure that is further provided with a center of gravity control plate 38 of the same structure as the water inlet control plate 37.

The center of gravity control plate 38 is also formed so that the long groove (H) is formed to adjust the position at the top of the opening and closing plate (3).

Therefore, when adjusting the position of the water inlet control plate 37, the center of gravity control plate 38 is also configured to balance the opening and closing plate 3 by adjusting the position.

" 형상의 물끊기바(16)가 더 설치되는 구조이다.In addition, the center of the upper surface of the opening and closing plate 3 has one side forms a vertical surface 161, the other side has a triangular structure forming an inclined surface 162 "

"The water break bar 16 of the shape is further installed.

The water breaking bar 16 is intended to smoothly open and close the opening and closing plate 3 by preventing the backflow of clear water and the average amount of sewage can not exceed the water breaking bar.

In addition, the water cutting bar 16 has a function of inducing the opening and closing plate 3 to be immediately closed by allowing the initial surface of the river and the river to rise as the level of the river rises so that the initial clear water cannot be crossed with the water cutting bar 16.

" 형상 이외에, 단면이 "

"의 형상을 갖도록 구성하여도 동일한 효과를 갖을 수 있는 것은 물론이다.Herein, the function of the inclined surface 162 of the water cutting bar 16 will be described in detail. The amount of sewage is small, but the flow rate of sewage is prevented from going to one side of the opening and closing plate 3 to prevent the opening and closing plate 3 from closing. And, more than three times the amount of rainwater and sewage so that the water flows naturally through the inclined surface 162 of the water cutting bar 16 to function to close the closing plate (3) smoothly.
Also the water break bar is "

"In addition to the shape, the cross section"

Of course, even if it is configured to have a shape of "" can have the same effect.

On the other hand, the horizontal holding stopper 4 is coupled to the other side of the frame (1) to function to control the closing (horizontal) of the opening and closing plate (3).

The horizontal holding stopper 4 is a structure in which a plurality of recessed grooves 41 are continuously formed in a zigzag to facilitate the inflow of sewage at one end.

At this time, when the horizontal holding stopper (4) also changes the position of the opening and closing plate 3 to adjust the amount of sewage inflow according to the average amount of sewage, a plurality of long grooves (H) to adjust the position, such as the opening and closing plate (3) This is further formed and configured. The horizontal holding stopper (4) is configured to be fastened to the connecting bracket 17 of the frame (1).

And the other side of the bottom surface of the horizontal holding stopper (4) is coupled to the separation frame 42 so as to be spaced apart on the upper surface of the frame (1), one side of the bottom when the closing plate (3) is closed sewage inflow hole ( 811 is configured to combine the water inlet blocking frame 43 to prevent water inflow.

Here, the spaced frame 42 is in close contact with the frame 1, and the water inlet blocking frame 43 is in close contact with the upper portion of the opening and closing plate (3).

This structure is to facilitate the opening and closing of the opening and closing plate (3) by dropping the height difference between the horizontal holding stopper (4) and the opening and closing plate (3) through the separation frame (42).

And the water inlet blocking frame 43, when the horizontal holding stopper 4 is spaced on the frame 1 by the spaced frame 42, a gap with the opening and closing plate 3 is generated, to eliminate such a gap will be.

On the other hand, if the opening means 7 is closed after a certain time after the closing plate 3 is closed, the rainwater chamber 81 is in a vacuum state, and the opening and closing plate 3 is not opened even if the water level of the sewage is three times or less. When not in operation to function to open and close the opening and closing plate (3).

On the other hand, the open stopper (5) is disposed to cross the lower side of the other side of the opening and closing plate (3) in a structure to move up and down to control the opening angle of the opening and closing plate (3).

The open stopper 5 takes an elongated " bar " shape and is lifted by the height adjusting means 6 coupled to both sides of the frame 1.

The height adjusting means (6) is freely rotatable on the bottom surface of the open stopper (5) so as to lift the open stopper (5) and the ball screw (61) inserted in a vertical downward direction on both sides of the frame (1) And a lifting nut 62 attached thereto.

That is, both sides of the open stopper (5) is suspended in the air by two ball screws (61), the ball screw 61 is a structure exposed to the upper portion of the frame (1). This structure is a structure in which the lifting nut 62 is elevated by the forced rotation of the ball screw 61, and as a result, the opening stopper 5 is elevated.

Here, the opening stopper 5 is disposed at the lower side of the other side of the opening and closing plate 3, and the other side of the opening and closing plate 3 adjusts the opening angle of the opening and closing plate 3 while lifting up in the open state inclined by its own weight. Function.

As a result, the height of the lifting stopper 5 is adjusted by the ball screw 61 exposed to the frame 1, so that the opening angle of the opening and closing plate 3 is easily adjusted by adjusting the height of the opening stopper 5. Can be.

5 is an operation diagram showing an operating state of the opening means extracted in FIG.

As shown in FIG. 5, the opening means 7 is closed when the opening and closing plate 3 is closed when the water level of the sewage level or the level of the clear water flowed back by the rise of the river and river is lowered. This should be opened, at this time when the inside of the rainwater tossile 81 is not in a vacuum state by opening the opening and closing plate (3) by force to open the function.

The opening means 7 are symmetrically installed in pairs.

Wherein each opening means 7 is a bearing bracket (BB) comprising a support rod 71 is installed in the longitudinal direction on one side inner surface of the frame 1, a bearing coupled to the end of the support rod 71 and , An open rod 72 installed in the bearing bracket BB in a lateral direction, a roller 721 coupled to an outer end of the open rod 72 and closely attached to a bottom surface of the opening and closing plate 3, and It is composed of a weight 722 is coupled to the inner lower portion of the opening rod (72).

The weight 722 is composed of a nut (3a) and a spiral weight (3b) is configured to adjust the falling weight of the opening rod (72).

Here, the opening rod 72 is installed in the transverse direction to the bearing bracket (BB) coupled to the support rod 71 is consequently coupled in the form of a lever.

The open rod 72 is pivotally coupled to the support rod 71 while being rotatable by a bearing bracket BB including a bearing, and is also inclined upward by the weight 722. .

At this time, the outer end of the opening rod 72 has a structure in which the roller 721 is coupled to be rolled without interference from the bottom of the opening and closing plate (3).

Referring to Figure 5 briefly described the operating relationship according to the structure of the opening rod 72, the opening and closing plate (3) is first closed by the water pressure of the three times the average amount of sewage and backflow (1). This is to prevent rainwater and clear river water from flowing into the rainwater soil chamber 81 that is connected to the sewage treatment plant (not shown).

After the opening and closing plate 3 is closed, when the water level is lowered or the amount of sewage flowing into the upstream is three times less than the average amount of sewage, the water pressure pressing the opening and closing plate 3 is weakened, and the opening and closing plate 3 is opened. Although it should be, if the inside of the stormwater chamber is not opened due to the vacuum state, the opening rod 72 is forced to open the opening and closing plate 3 (②).

Meanwhile, a stopper rod 14 for intermittently controlling the opening angle of each of the opening rods 72 is further provided on one side inner surface of the frame 1, and the stopper rod 14 is inside one side of the frame 1. It is configured to adjust the inclination angle of each opening rod 72 through a plurality of coupling holes 15 formed at a height difference on the surface.

That is, the stopper rod 14 functions to allow the opening rod 72 to be caught so that the inclination angle is inclined to an appropriate level. In addition, the stopper rod 14 may be coupled to the selected coupling hole 15 to adjust the inclined angle of the opening rod 72.
6 is a perspective view showing another opening means of FIG.
As illustrated in FIG. 6, a plurality of through holes 723 may be formed in the opening bar 72 of each opening means 7 so as to adjust the center of gravity of the bearing bracket BB.
In addition, the inner surface of one side of the frame 1 may be configured by coupling the stopper bracket 18 supporting the stopper rod 14.
The stopper rod bracket 18 may be configured by attaching a coupling nut 181 to insert the stopper rod 14.

FIG. 7 is a perspective view illustrating an opening and closing plate of another embodiment extracted from FIG. 2.

As shown in FIG. 7, the other side bottom surface of the opening and closing plate 3 is further attached to the buoyancy cylinder 35.

At this time, the front weight 31 is coupled to only one bottom surface of the opening and closing plate 3, and the buoyancy cylinder 35 replaces the function of the rear weight 32.

This structure adjusts the weight of the opening and closing plate (3) using only the front weight (31), and when the clear water of the river or river flows back to the rainwater chamber (81), by the buoyancy tube (35) This is to open and close the opening and closing plate (3) smoothly.

The opening and closing plate 3 of this structure is preferably used when there is no high / low difference between river water and river water level and rainwater tosyl. This is to allow the opening and closing plate (3) to be quickly closed because the river or river is easily flooded and the clear water easily flows back.

As described above, the present invention has been described based on the preferred embodiments with reference to the accompanying drawings, but it will be apparent to those skilled in the art that various obvious modifications may be made without departing from the scope of the present invention. Therefore, the scope of the invention should be construed by the claims described to include many such variations.

1 is a perspective view showing the appearance of rainwater and sediment inflow prevention device of rainwater soil according to an embodiment of the present invention,

FIG. 2 is an enlarged view of rainwater and soil inflow prevention apparatus of rainwater tossil extracted from FIG. 1;

3 is a perspective view showing a separated state of the opening and closing plate and the horizontal maintenance stopper in FIG.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is an operation diagram showing an operating state of the opening means extracted from FIG.
6 is a perspective view showing another example of the opening means.

FIG. 7 is a perspective view illustrating an opening and closing plate of another embodiment extracted from FIG. 2.

<Description of the symbols for the main parts of the drawings>

1: frame 11: sub support frame

12: support bracket 13: separator

14: stopper rod 15: coupling hole

16: Water Break Bar 161: Vertical Plane

162: slope 17: connection bracket
18: Stopper Bracket 181: Coupling Nut

2: axis of rotation

3: opening and closing plate 31: front weight 32: rear weight

3a: nut 3b: helix weight

35: buoyancy tube 36: recessed groove

37: water inlet control plate 38: center of gravity control plate

4: leveling stopper 41: recessed groove 42: spaced frame

43: water inlet blocking frame

5: open stopper

6: height adjusting means 61: ball screw 62: lifting nut

7: opening means 71: support rod 72: opening rod

721: roller 722: weight
723: through hole

8: sewer 81: stormwater 811: sewer inlet 82: connector

83: tea house

H: Long groove BB: Bearing bracket

Claims (8)

A frame (1) seated in at least one sewage inlet hole (811) formed in the rainwater soil chamber (81) provided on the discharge side of the sewer (8) and having a separator (13) installed on an upper surface thereof; A rotating shaft 2 coupled across the inside of the frame 1 along the transverse direction of the hole 811; and the rotary shaft 2 is arranged on the rotating shaft 2 and opens and closes the sewage inflow hole 811 according to the amount of sewage. Opening and closing plate (3); and the horizontal holding stopper (4) coupled to the other side of the frame (1) to control the closed state of the opening and closing plate (3), and the opening angle of the opening and closing plate (3) can be controlled. In the rainwater and earth and sand inflow prevention device of rainwater soil composed of open stopper (5), The opening and closing plate 3, In order to facilitate the inflow of sewage to the other side, a plurality of recessed grooves 36 are continuously formed in a zigzag, It is configured to be easy to open after closing through a pair of opening means (7) attached to one inner surface of the frame (1), Rain and earth inflow prevention device of rainwater tosoil, characterized in that the other side of the upper surface of the opening and closing plate (3) is further provided with a water inlet control plate 37 for opening and closing the recessed groove (36). The method of claim 1, Rain and earth inflow prevention device of rainwater tosoil, characterized in that the opening and closing plate (3) is further attached to the buoyancy cylinder 35 on the bottom of the other side. delete The method according to claim 1 or 2, Rain and earth inflow prevention device of rainwater tosoil, characterized in that the center of gravity control plate 38 for adjusting the center of gravity of the opening and closing plate (3) is further provided on one side of the opening and closing plate (3). The method of claim 1, In the center of the upper surface of the opening and closing plate 3, one side forms a vertical surface 161, and the other side forms an inclined surface 162.

Excellent rainwater tosoil and earth and sand inlet prevention device, characterized in that the water-cutting bar 16 of the shape is further installed. The method of claim 1, The horizontal maintenance stopper 4 is further formed with a plurality of long grooves (H) to adjust the amount of sewage inflow according to the sewage and rainwater, The other side of the bottom is coupled to the separation frame 42 to be spaced apart on the upper surface of the frame (1), Rainfall and earthquake inflow prevention device of rainwater tosoil, characterized in that the bottom side side is configured to combine the water inlet blocking frame 43 to prevent the inflow of water into the sewage inlet hole 811 when the opening and closing plate (3) is closed. The method of claim 1, The opening means 7 are installed in a pair symmetrical with each other, A bearing bracket (BB) including a support rod (71) installed in a longitudinal direction on one inner surface of the frame (1), a bearing coupled to an end of the support rod (71), and a transverse direction to the bearing bracket (BB) Opening rod 72 is installed to the roller, the roller 721 is coupled to the outer end of the opening rod 72 is in close contact with the bottom surface of the opening and closing plate 3, coupled to the inner lower portion of the opening rod 72 Rainfall and soil inflow prevention device of rainwater toil characterized in that consisting of the weight 722. The method of claim 7, wherein On one inner surface of the frame 1 is further provided with a stopper rod 14 that can control the opening angle of each of the opening rods 72, The stopper rod 14 is characterized in that it is configured to adjust the inclination angle of each of the opening rods 72 through a plurality of coupling holes 15 formed with a difference in height on one side inner surface of the frame (1) Rainwater superiority and earth and sand inflow prevention device.

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