KR101978861B1 - Gas barrier device for culvert outlet - Google Patents

Abstract

The present invention relates to an air current blocking device which is installed on an outlet of a culvert whose upper portion is covered in a pipe facility to prevent bad smell creation. The air current blocking device basically comprises: an air current blocking member provided in a plurality of horizontal division groups forming steps in a vertical direction, wherein the plurality of horizontal division groups each is independently supported while only an upper end thereof is fixed; a frame assembly including an inner frame tightly fixed on an inner side of a culvert outlet, and an outer frame fixed on an inner side of the inner frame to accommodate the air current blocking member; and a first magnet fixing means to fix an inner side of the outer frame and the outermost side of the air current blocking member by a magnetic force. The air current blocking device is installed on a large-diameter culvert outlet to secure an excellent air current blocking property regardless of a flow increase/decrease without disturbing a wastewater flow, facilitates maintenance, repair and management, and is favorably applied to a system forming a negative pressure to prevent bad smell dispersion to easily check whether a negative pressure is formed.

Description

Air flow blocker for culvert earthenware {GAS BARRIER DEVICE FOR CULVERT OUTLET}

The present invention relates to an airflow shutoff device for preventing odor from being installed at the toe side of a culvert covered with an upper part of a conduit facility.

Generally, conduit facilities are installed to collect sewage or rainwater discharged from houses, commercial and industrial areas (hereinafter referred to as 'waste water') and to discharge it to discharged water such as treatment plants, rivers and rivers. Although the conduit facility has an open top form, the collected wastewater is transported through underground culverts, which are buried or covered underground and covered with tops until they reach the discharge area, where odors are released to the surrounding area. Means are provided to prevent this.

Conventional odor emission means provided on the side of the culvert is a hinge type coupled to the toe-side peripheral concrete is a typical door type of rigid material that can be opened and closed in the vertical or horizontal direction. Such opening and closing doors have the advantages of good airflow barrier property and good durability, but they are not easy to be installed on the culvert earthenware side of large diameter more than several tens of meters, and if they are not opened on time in case of emergency, the water volume is rapidly increased due to flood, etc. There is a problem that excessive cost or effort is involved in installation, management, and maintenance, such as the discharge of wastewater may cause backflow of wastewater, and in case of breakage due to water pressure, etc.

As another type of odor emission prevention means installed on the culvert earthenware side, it is known to apply an integrated or transversely divided flexible member provided that one end is simply fixed to the concrete at the top of the toe side and the other end is provided to be suspended to the bottom of the toe side. have. This method performs the airflow blocking function flexibly with the increase or decrease of the waste water, but the durability of the flexible member itself is a problem, and as the waste water quantity increases, the pressure applied to the discharged flexible member increases greatly, so that the flexible member at the upper side of the waste water level is increased. There is a problem that the lifting angle of the is increased, the airflow barrier property is sharply lowered, and the possibility of dropping out increases. In addition, there is a problem that the maintenance of all or a part when the flexible member is dropped.

On the other hand, a technique for preventing the spread of odor by forming a negative pressure inside the sewage conduit and wells facilities is known in Korean Patent Application No. 10-2012-0074957 filed by the present applicant, in this case to facilitate the formation of negative pressure Like the rim side of the culvert, a predetermined shielding rate is applied to the end portion of the duct using an air curtain type air flow barrier. However, in the case of the conventionally known airflow blocking device, it is possible to easily establish the sound pressure by ensuring good airtightness without damaging the inherent function of the conduit such as the discharge of waste water, and easily check the presence or absence of the formation of the negative pressure in the field. Consideration is given to technical means which can be advantageously applied to odor diffusion and removal systems such as No. 10-2012-0074957.

-Korean Patent Publication No. 10-2012-0074957

It is an object of the present invention to provide an air flow block device for a culvert earthenware which is installed in a large diameter culvert earthenware to secure excellent airflow blocking property without disturbing the flow of wastewater and increasing and decreasing flow rate. will be. In addition, another object of the present invention is to provide an airflow blocker for a culvert earthenware which can be particularly advantageously applied to a system for forming a negative pressure to prevent odor diffusion and easily confirms the presence or absence of a negative pressure.

The present invention has been made as a result of a thorough investigation in order to solve the above problems, the subject matter of which is the same as described in the claims.

(1) An airflow blocking device installed in a culvert earthenware, provided as a plurality of horizontal division groups forming stages in the vertical direction, each of the plurality of horizontal division groups being independently supported with only an upper end fixed thereto. ; A frame assembly including an inner frame tightly fixed to an inside of a culvert earthenware to form a smoothness, and an outer frame fixed to an inner side of the inner frame to accommodate the airflow blocking member; And a first magnet fixing means for fixing the inner side of the outer frame and the outermost side of the airflow blocking member by magnetic force.

(2) The airflow shutoff device for culvert earthenware according to (1), further comprising second magnet fixing means provided between the dividing elements of the airflow blocking member in each of the plurality of horizontal division groups.

(3) The air flow block device for a culvert earthenware device of (1), further comprising a weight plate fixed to the split element of the air flow block member.

(4) The air flow blocking device for culvert earthenware according to (1), wherein the air flow blocking member is coated with a hydrophilic antifouling agent.

(5) The air flow blocking device for the culvert earthenware device of (1), wherein a shielding plate extending in the front-rear direction is provided on one side of the split element of the airflow blocking member positioned at the outermost side in the installed state.

(6) The air flow shutoff device for culvert earthenware according to (1), wherein the inner frame is a section steel or a flat plate having a "b" shaped cross section.

(7) The outside frame is an air flow blocking device for a culvert earthenware device according to (1), wherein the outer frame is any one of a section steel having a “c” shaped protruding hollow portion, a section steel of a “b” shaped section, or a flat plate. .

(8) The splitting element of the air flow blocking member located at the uppermost end is a hanger which is disposed in the horizontal direction at the upper side of the culvert earthenware and fixed to the outer frame, and the first element disposed to surround the inner side of the hanger. The air flow block device for a culvert earthenware device of (1), which is rotatably fixed by a hinge.

(9) The culvert of (1) above, wherein the splitting element of the airflow blocking member located at the lower end is disposed in front of the splitting element of the airflow blocking member located at the upper end and is rotatably fixed by the second hinge. Airflow blocker for earthenware.

(10) a perforation portion provided in at least part of the air flow blocking member; And a rotatable plate disposed to cover the perforated part and rotating to the rear of the airflow blocking member, wherein the perforated part is visually formed by rotating the rotatable plate rearward when forming a negative pressure in a culverted earthenware. Air flow blocking device for culvert earthenware of (1), characterized in that identified as.

(11) a hook provided at a lower end of the dividing element of the airflow blocking member located at the lower end; And a brace provided at an upper end of the splitting element of the airflow blocking member located at the upper end. The folding fastening means includes a hook and the hook after the splitting element of the airflow blocking member located at the lower end is folded upward. The air flow block device for a culvert earthenware device of (1), which is fixed by fastening of the latch.

According to the air flow blocker for the culvert earthenware according to the present invention, excellent gas airtightness can be ensured at both the center and the periphery of the culvert earthenware regardless of the flow fluctuation in the culvert or the material of the air flow blocking member, and in particular, the odor is based on such excellent gastightness. It can be advantageously used as part of a device or system that creates a sound pressure inside the culvert to prevent diffusion, in which case the presence or absence of sound pressure can be visually identified from a distance, so the airflow blocker itself and the sound pressure forming device or system using the same In addition, the airflow blocking device according to the present invention includes a configuration in which the airflow blocking member is divided, and a configuration for the airflow blocking member to which a hydrophilic antifouling agent having a self-cleaning function is applied. It is easy to maintain and manage the parts, and contact the lower part of the horizontal split group airflow blocking member. Through the means for fixing a manner it may not prevent a person or vehicle access to the facility inspection and cleaning purposes culverts.

1 is a perspective view of an air flow blocker for a culvert earthenware according to an embodiment of the present invention.
Figure 2 is a front view and side view of the airflow blocking device of Figure 1 normally.
Figure 3 is a side view of the airflow blocking device of Figure 1 when the flow rate increases.
Figure 4 is a mounting structure of the frame assembly according to an embodiment of the present invention.
5 is a conceptual view of the operation of the sound pressure identification means according to an embodiment of the present invention.
6 is a conceptual view of the operation of the folding fixing means according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention. In the drawings, the same or equivalent reference numerals are given the same or similar reference numerals. In addition, throughout the specification, when a portion is to include a certain component, which means that it may further include other components, except for the other components, unless specifically stated otherwise. In addition, when any component is provided as 'optionally' provided, provided or included, it is not an essential component for the solution of the present invention, but it can be arbitrarily adopted in terms of such a solution. it means. Hereinafter, for convenience of explanation and understanding, with respect to the arrangement and installation orientation of the component elements of the airflow blocking device, the direction in which wastewater is discharged based on the culvert earthenware is described as 'front' and vice versa.

Figure 1 shows a perspective view of the air flow blocking device 10 (hereinafter, abbreviated as "airflow blocking device 10") for the culvert 20 in accordance with an embodiment of the present invention, Figure 2 is a normal air flow blocking device (10) The front view and side view of), and FIG. 3 shows the side view of the airflow blocker 10, respectively, when flow volume increase. The airflow blocking device 10 has a basic configuration of the airflow blocking member 100, the frame assembly 200, and the first magnet fixing means 130 (112, 222).

The airflow blocking member 100 may be selected from caustic materials such as carbon reinforcing materials, metal plates, and hard rubbers for durability, but does not exclude flexible materials. In the present invention, even if a rigid material is selected for the airflow blocking member 100, securing the airtightness even if it is inclinedly displaced with increasing flow rate is one of the main problems. As a part thereof, the airflow blocking member 100 is provided as a plurality of horizontal division groups 110A and 110B forming a stage in a vertical direction, and each of the plurality of horizontal division groups 110A and 110B has only an upper end fixed thereto. It is characterized by being supported independently in a state. Hydrophilic antifouling agents such as titania (TiO 2) or antifouling paint may be applied to the outer surface of the airflow blocking member 100 to prevent foreign matter from adhering to the surface due to contact with the waste water and have a self-cleaning function.

Meanwhile, in the embodiment, the horizontal division groups 110A and 110B of the airflow blocking member 100 are composed of two stages at the top and the bottom thereof, and the upper horizontal division group 110A is the division element of one airflow blocking member 100. The lower horizontal division group 100B is illustrated as being provided as a split element of the two airflow blocking members 100, respectively. However, despite the illustrated embodiment, the horizontal division groups 110A and 110B of the airflow blocking member 100 may be provided in two or more stages according to the width or height of the culvert 20, and each horizontal division may be provided. The division elements of the airflow blocking member 100 in the groups 110A and 110B may be provided in two or more suitable numbers.

The frame assembly 200 includes an inner frame 210 and an outer frame 220, through the role of forming a smoothness for the inside of the culvert 20, the housing and the air blocking member 100, In the state in which the airflow blocking member 100 is installed, the airtightness is secured along the periphery of the culvert 20 to provide a structure that is advantageous for negative pressure formation and odor diffusion prevention. 4 shows a mounting structure of the frame assembly 200. The material of the frame assembly 200 is not particularly limited to metal, plastic, and the like.

Referring to FIG. 4, the inner frame 210 is related to the formation of smoothness on the inside of the culvert 20, and is fixed inside the culvert 20 by the anchor. For this purpose, the inner frame 210 is preferably provided with a section steel having a cross-section 'b' shape, and is installed to cover the protruding edges of the culvert 20 inside the tow, thereby causing damage or irregularities inside the culvert 20 to the inside. By concealing the back and the like, it is possible to give an advantageous smoothness to the gas tightness. The inner frame 210 is provided on the upper and left and right inner sides of the culvert 20, respectively.

The outer frame 220 is respectively associated with receiving the outermost side of the airflow blocking member 100 so as to completely shield, and is fixed to the front of the inner frame 210 exposed to the front of the culvert 20. For this purpose, the outer frame 220 is preferably provided with a section steel having a protruding hollow portion 221 having a hat-shaped cross-section 'c' shape, and is located at the outermost side by the protruding hollow portion 221. The side of the split element of the airflow blocking member 100 is concealed in a closed manner, thereby contributing to the improvement of gas tightness. Like the inner frame 210, the outer frame 220 is provided on the upper and left and right sides of the culvert 20, respectively.

Connection between the airflow blocking member 100 and the frame assembly 200 is made by the hanger 300 and the first hinge 310. In the embodiment, the upper horizontal division group 110A is illustrated as one airflow blocking member 100 dividing element, and the upper horizontal division group 110A has only a top end thereof by way of the first hinge 310. It is rotatably fixed to 300). The hanger 300 is rod-shaped, and both ends thereof are fixed through the protruding hollow portion 221 of the outer frame 220, and the end portion of the first hinge 310 is annular and manufactured in a double overlapping structure for preventing the hanger 300. ) And can be easily removed and mounted. In this case, the annular first hinge 310 is preferably arranged to surround the inner surface of the hanger 300, that is to surround the rear of the hanger 300. When the first hinge 310 is arranged to surround the rear of the hanger 300, it is advantageous to arrange so that the side of the airflow blocking member 100 is concealed by the protruding hollow portion 221 of the outer frame 220. Also, since the opening of the annular first hinge 310 is located in front of the hanger 300, the upper horizontal division groups 110A and 110B are inclined toward the front of the culvert 20 according to the increase in flow rate, so that the excessive flow pressure Even when placed on the impact and / or tilt angle, they do not deviate easily.

The plurality of horizontal split groups 110A and 110B are connected by the second hinge 320. In the embodiment, the upper horizontal division group 110A is composed of one airflow blocking member 100 dividing element, and the lower horizontal division group 10B is illustrated with two airflow blocking member 100 dividing elements. The upper ends of the two lower airflow blocking member 100 dividing elements are rotatably fixed to the lower end of the one upper airflow blocking member 100 dividing element through a second hinge 320. The second hinge 320 has a double overlapping structure for preventing the end from being separated and hingedly illustrated. In this case, the lower airflow blocking member 100 splitting element and the upper airflow blocking member 100 dividing element are disposed to overlap each other to secure gas tightness at the boundary, and the lower airflow blocking member 100 splitting element is the upper airflow. It is preferable to be disposed in front of the dividing element 100, that is, the front side of the culvert 20.

First magnet fixing means (130; 112, 222) is provided between the inner side of the outer frame (220) and the outermost side of the airflow blocking member (100) for better gas tightness. In the embodiment, the first magnet fixing means (130; 112, 222) and the first magnetic plate 112 provided on the side of the side of the divided element of the outermost airflow blocking member 100 opposite the outer frame 220 and The first magnetic plate 222 is provided on the protruding hollow portion 221 side of the outer frame 220. Even if the gas tightness between the inner side of the outer frame 220 and the outermost side of the airflow blocking member 100 is momentarily impaired due to the momentary movement of the airflow blocking member 100 to the front of the culvert 20 by the rapid airflow pressure, such damage is caused. It can be recovered immediately by the first magnet fixing means (130; 112, 222) so that the steady state gas tightness between the inner side of the outer frame 220 and the outermost side of the airflow blocking member 100 can be maintained well. . The first magnetic plates 112 and 222 may have a continuous strip shape and may be partially disposed at regular intervals in a dot to reduce material costs. In addition, when the outer frame 220 itself or the air flow blocking member 100 is made of a ferromagnetic material, any one of the first magnetic plates 112 and 222 may be omitted.

Second magnet fixing means 1400 (112 ', 112') are provided for better gas tightness between the split elements of the airflow blocking member 100. The second magnet fixing means 140 (112 ', 112') is exemplified by the second magnet plate 112 'provided on the outermost side opposite to the side of the split element of the lower airflow blocking member 100. Sudden air flow pressure change is caused by the irregular flow of the air flow blocking member 100 is momentarily moved to the front of the culvert 20, the moment between the divided elements of the air flow blocking member 100 to generate a momentary gap between the gas tightness momentarily Even if damaged, such damage can be immediately recovered by the second magnet fixing means 140 (112 ', 112') so that the steady state gas tightness between the split elements of the airflow blocking member 100 can be maintained well. have. The second magnet plate 112 ′ may have a continuous strip shape and may be partially disposed at regular intervals in order to reduce material costs. In addition, when the airflow blocking member 100 is made of a ferromagnetic material, the second magnetic plate 112 ′ may be provided to only one of the split elements of the airflow blocking member 100.

The division plate of the airflow blocking member 100 may be optionally provided with a weight plate 600 to improve the upright state. The weight plate 600 is provided on each of the dividing elements of the airflow blocking member 100, and is fixed to the bottom so that the center of gravity is formed below the dividing element. In order to form the center of gravity downward, more preferably, the weight plate 600 is preferably extended to taper downward. By the weight plate 600, the upright state and the gas-tightness of each divided element of the airflow blocking member 100 are further improved. That is, even when each of the air flow blocking member 100 divided elements are selected as a low weight thin material for cost reduction purposes, the weight center of the air flow blocking member 100 divided elements is positioned below by the weight plate 600. The upright state and thus gas tightness become good.

Referring to FIG. 3, one side of the split element of the airflow blocking member 100 positioned at the outermost side in the installed state of the airflow blocking member 100 may be selectively provided with a shielding plate 114 extending in the front-rear direction. have. The shielding plate 114 is illustrated as being integrally formed on the splitting element of the airflow blocking member 100. In this case, even when the airflow blocking member 100 is inclined forward according to the increase in flow rate, Gas tightness in the side can be effectively maintained. On the other hand, in the embodiment is illustrated that the blocking plate 114 is provided only in the partition element of the airflow blocking member 100 of the lower horizontal partition group 100B, the airflow blocking member 100 of the upper horizontal partition group (100A) It may also be formed on the splitting element. However, when the horizontal splitting group located on the upper side is to be inclined with increasing flow rate, the necessity for gas tightness is halved compared to the necessity for smooth flow discharge. The need for

The airflow blocking device 10 according to the present invention, in addition to the design of the component elements in terms of gas tightness as described above, is provided as a simple shielding means for the culvert 20 and the earthing means, in particular a negative pressure inside the culvert 20. Applied as part of the device or system to be formed as one of the main challenges, as part of the device may be provided as an optional means to easily identify whether the negative pressure is formed. 5 shows an operation conceptual diagram of the sound pressure identifying means 400.

Referring to FIG. 5, the sound pressure identifying means 400 includes a perforation portion 410 provided in the dividing element of the airflow blocking member 100, and a rotating plate 420 formed corresponding thereto. The pivoting plate 420 is disposed to shield the perforation part 410 and is fixed to the front and rear rotation by the third hinge 430, and is formed to the rear of the airflow blocking member 100 when the negative pressure is formed in the culvert 20. It works by rotating. That is, as the airflow blocking member 100 rotates backward when the negative pressure is formed in the culvert 20, the perforated part 410 is opened, and the open perforated part 410 has a dark dark room effect of the crypt 20. It is visually recognized in black from the outside, through which it is possible to clearly identify whether the sound pressure in the culvert 20 is formed at a distance with the naked eye. If a device or system that creates a negative pressure inside the culvert 20 is in operation, there may be a failure of such a device or system or gas tightness damage to the culvert 20 if the perforations 410 are not visible. Can be. On the other hand, since the size of the perforations 410 is extremely small compared to the total discharge area of the culvert 20, the gas tightness damage due to the opening of the perforations 410 can be ignored.

Airflow blocking device 10 according to the present invention, if a person or a vehicle needs to enter or exit for the purpose of facility inspection or cleaning in the culvert 20, or to facilitate this when the airflow blocking device 10 itself needs to be checked. A foldable fixing means 500 for the air flow blocking member 100 may be further included. 6 shows an operation conceptual diagram of the folding fastening means 500.

Referring to FIG. 6, the folding fixing means 500 includes a hook 510 and a latch 520. In an embodiment the hook 510 is illustrated as being provided on the split element of the lower airflow blocking member 100 and the latch 520 is provided on the split element of the upper airflow blocking member 100. That is, as the split element of the air flow blocking member 100 at the lower end is rotated forward to the toe of the culvert 20 and folded upward, the hook 510 is fixed to the latch 520, and thus the air flow at the lower end. Folding state of the blocking member 100 can be maintained firmly can be made freely of people and vehicles through the developed space.

As described above, according to the culvert 20 of the present invention, the airflow blocking device 10 for earthenware, even when the airflow blocking member 100 is made of a rigid material for durability, (i) the airflow blocking member 100 Is provided to a plurality of horizontal division groups (110A, 110B) to form a stage in the vertical direction, and each of the plurality of horizontal division groups (110A, 110B) so that only the upper end is fixed independently, and the air flow Optionally provided at the lower end of the blocking member 100 through the configuration of the weight plate 600 for inducing the vertical state of the airflow blocking member 100, airflow blocking member 100 according to the flow rate increase or decrease without interrupting the waste water flow By minimizing the lifting angle of the culvert 20 ensures gas tightness at the center of the culvert (20), (ii) the installation structure of the frame assembly 200 is installed around the culvert (20) to the port to accommodate the airflow blocking member 100 W, outermost air blocking member The construction of the shielding plate 114 material provided to the 100 ensures gas tightness at the periphery of the culvert 20, and at the same time (iii) between the airflow blocking member 100 and the frame assembly 200. First magnet fixing means (130; 112, 222) and second magnet fixing means (140; 112 ', 112') provided in or between the airflow blocking members (100) forming one horizontal division group (110A, 110B). By ensuring the gas tightness in both the center portion and the periphery of the culvert 20 through the structure of the), it has excellent gas tightness throughout the culvert 20. In addition, the culvert 20 of the present invention, the air flow block device 10 for earthenware may be advantageously used as part of an apparatus or system for forming a sound pressure inside the culvert 20 to prevent odor diffusion based on such excellent gas tightness. In this case, the presence or absence of sound pressure can be visually identified by the sound pressure identification means 400 at a long distance to easily check and manage the abnormality of the airflow blocking device 10 itself and the sound pressure forming device or system using the same. Can be. In addition, the airflow blocking device 10 according to the present invention, the airflow blocking member 100 is divided, and the configuration of the airflow blocking member 100 coated with a hydrophilic antifouling agent having a self-cleaning function In the culvert 20 through the configuration of the hook 510 and the latch 520 for easy maintenance and management, and also to fold the lower side horizontal division groups (110A, 110B) airflow blocking member 100 in a foldable manner. It may not interfere with persons or vehicles entering or leaving the facility for inspection or cleaning purposes.

The foregoing description relates to specific embodiments of the present invention, but the embodiments according to the present invention are disclosed for the purpose of description and are not to be understood as limiting the scope of the present invention. It should be understood that various changes and modifications can be made to the disclosed embodiments without departing from the spirit of the invention.

For example, in the embodiment illustrated the cross-sectional shape of the inner frame 210 for forming the smoothness of the culvert earthenware in the cross-section 'b' shape, it is also possible if the cross section is a flat plate. In addition, in the embodiment, the cross-sectional shape of the outer frame 220 for accommodating the outermost frame of the airflow blocking member 100 to be completely shielded is illustrated as a section steel having a protruding hollow portion 221, but the cross-sectional 'b' shape Or reputation is also possible.

Accordingly, all such modifications and variations can be understood as fall within the scope of the invention as set forth in the claims or their equivalents.

10: Air flow blocker for culvert earthenware
100: air flow blocking member
110A, 110B: Horizontal division group
112: first magnetic plate 112 ': second magnetic plate
114: blind plate
200: frame assembly
210: inner frame 220: outer frame
221: protruding hollow portion 222: first magnetic plate
130, 112, 222: first magnet fixing means
140, 112 ', 112': second magnet fixing means
300: hanger
310: first hinge 320: second hinge
400: sound pressure identification means
410: puncher 420: rotating plate
430: third hinge
500: folding fastening means
510: hook 520: latch
600: weight plate
20: culvert

Claims (11)

An airflow blocking device installed in a culvert earthenware, the airflow blocking device being provided as a plurality of horizontal splitting groups forming a stage in a vertical direction, each of the plurality of horizontal splitting groups independently supported by a fixed upper end; A frame assembly including an inner frame tightly fixed to an inside of a culvert earthenware to form a smoothness, and an outer frame fixed to an inner side of the inner frame to accommodate the airflow blocking member; First magnet fixing means for magnetically fixing the inner side of the outer frame and the outermost side of the airflow blocking member; Second magnet fixing means provided between the splitting elements of the airflow blocking member in each of the plurality of horizontal division groups; A weight plate integrally formed and fixed to the dividing element of the airflow blocking member to directly rotate the airflow blocking member in its own weight direction, and having a tapered structure extending downward; And sound pressure identification means for confirming whether or not a sound pressure is formed in the culvert earthenware.
The sound pressure identification means, the punching portion provided on at least part of the air flow blocking member; And a pivoting plate disposed to cover the perforation, and rotating to the rear of the airflow blocking member, wherein the percussion is visually identified by rotating the pivoting plate rearward when a negative pressure is formed in the culvert earthenware.
The inner frame is provided with a section steel “b” shaped section steel so as to form a smoothness with respect to the inside of the culvert earthenware, and the outer frame is completely shielded to accommodate the outermost side of the airflow blocking member. Characterized in that it is provided as a section steel with a protruding hollow in the shape of
Air flow blocker for culvert earthenware. delete delete delete The airflow blocking device for a culvert earthenware device according to claim 1, wherein a shielding plate extending in the front-rear direction is provided on one side of the split element of the airflow blocking member positioned at the outermost side in the installed state. delete delete According to claim 1, wherein the splitting element of the airflow blocking member located at the uppermost end is disposed in a horizontal direction from the inner upper portion of the culvert earthenware to be fixed to the outer frame, and is arranged to surround the inner surface of the hanger An air flow shutoff device for a culvert earthenware, which is rotatably fixed by a first hinge. The method of claim 1, wherein the splitting element of the airflow blocking member located at the lower end is disposed in front of the airflow blocking member dividing element located at the upper end and is rotatably fixed by the second hinge. Airflow blocker. delete According to claim 1, Hook provided in the lower end of the split element of the air flow blocking member located at the lower end; And a brace provided at an upper end of the splitting element of the airflow blocking member located at the upper end. The folding fastening means includes a hook and the hook after the splitting element of the airflow blocking member located at the lower end is folded upward. An air flow shutoff device for a culvert earthenware, which is fixed by fastening of the clamp.

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