KR20070056013A - Rainwater drain control system of manhole having multi-structure - Google Patents

Abstract

The present invention relates to a manhole rainwater control device having a multi-structure, and more particularly, the buoyant body by the lifting rod connecting upper and lower buoyancy cylinders and the two buoyancy cylinders to form a buoyancy body and mounted on the outlet of the horizontal bulkhead inflow of rainwater It relates to a rainwater control device having a simple structure that allows the buoyancy body to be elevated by lifting and closing the discharge port to control the rainwater discharge path.

According to the present invention, the upper and lower parts of the manhole are partitioned by horizontal partitions, and rainwater pipes are installed in the partitioned upper superior spaces, and sewage pipes are installed in the partitioned lower drainage spaces. In the manhole rainwater control device having a multiple structure to control the rainwater flow path according to rainwater, the discharge hole is formed in the horizontal partition wall partitioning the inner space of the manhole up and down to drain the initial rainwater collected to the bottom Wow; The hollow part is formed inside the upper and lower buoyancy passages respectively placed in the upper superior space and the lower sewage space, connecting the upper and lower buoyancy cylinder is inserted and installed in the discharge port is composed of a lifting rod defining the lifting height, the upper and lower buoyancy cylinder A buoyancy body which is formed in a size larger than the outlet and closes the outlet in contact with the outlet when the valve is in the maximum rising position and the maximum falling position; It is installed on the upper surface of the horizontal bulkhead so as to contain the elevating buoyancy body to filter large foreign matter; is configured to include.

Manhole, Multiple Manhole, Rainwater, Buoyancy, Horizontal Bulkhead

Description

Rainwater Drain Control System of Manhole having multi-structure

1A is a perspective view of a manhole having multiple structures of the present invention,

Figure 1b is a cross-sectional view A-A of Figure 1a,

Figure 2 is a cross-sectional view showing an embodiment of the rain arrester according to the present invention,

3 to 5 are cross-sectional views showing various embodiments of the buoyancy body according to the present invention,

6 is a cross-sectional view showing a state in which a stainless plate is mounted on the outlet of the horizontal bulkhead,

7 is a cross-sectional view showing a rainwater arrester according to another embodiment of the present invention,

8 is a cross-sectional view showing a form in which a rubber plate is mounted on the horizontal bulkhead of the present invention,

9 is a plan view illustrating a plurality of auxiliary outlets formed in the horizontal bulkhead according to the present invention;

10a and 10b is a plan view showing another form of the horizontal bulkhead outlet according to the present invention,

11A to 11C are cross-sectional views showing an operating state using the embodiment shown in FIG. 1B.

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

10 manhole 11: housing

12: cover 13: upper rain space

14: lower sewage space 20: horizontal bulkhead

21: outlet 22: auxiliary outlet

23: shock absorbing plate 30: excellent intermittent device

40, 40 ': buoyancy body 41: upper buoyancy tube

42: lower buoyancy cylinder 43: lifting rod

44, 44 ': hollow 50: strain mesh

51: anchor bolt 60: excellent view

70: sewer pipe 211: protective plate

411, 421, 431: Female thread part 412, 422, 432: Male thread part

The present invention relates to a manhole rainwater control device having a multi-structure, and more particularly, the buoyant body by the lifting rod connecting upper and lower buoyancy cylinders and the two buoyancy cylinders to form a buoyancy body and mounted on the outlet of the horizontal bulkhead inflow of rainwater It relates to a rainwater arrester having a structure such that a buoyancy body lifting and lowering by to open and close the discharge port to control the rainwater discharge path.

In general, the manhole is installed at the connection part of the sewage pipes for flowing living sewage generated in the home or the shopping mall, and is formed in an accessible structure to easily remove sludge accumulated in the sewage pipes. In addition, the manhole is a conduit with the adjacent sewer pipe is made to collect sewage or rainwater, and the drainage is formed on both sides of the road to serve to quickly drain the rainwater dropped on the road.

In addition, the conventional manhole having a multi-structure is provided with a lid to open and close at the top, the manhole is partitioned up and down through the middle wall, and the rainwater pipe and the sewer pipe are connected to the partitioned upper and lower, respectively. The manhole having such a multi-structure can reduce the cost of sewage treatment by allowing rainwater and sewage to flow using different pipes, and utilize rainwater with clean water quality.

However, the above-mentioned conventional manhole has harmful substances in the form of tire wear particles, automobile combustion dust, etc. generated by driving a car on road surfaces such as roads, bridges, and elevated roads, and in the atmosphere contained in early rainy weather. Hazardous chemicals were discharged into the rivers through storm pipes and became a source of pollution.

Therefore, the present applicant is configured to separate the inside of the manhole up and down in the Republic of Korea Patent Registration No. 681956, but equipped with a lifting means on the separation partition to be moved up and down according to the degree of excellence so that the initial excellent water containing a large amount of pollutant is discharged through the sewer pipe. To prevent river pollution.

However, the elevating means is difficult to manufacture in a complicated form in which a plurality of members are combined, and there is a disadvantage in that manufacturing time and manufacturing cost are increased.

In this regard, the present invention has been made to solve the above problems,

The inside of the manhole is partitioned into an upper superior space and a lower sewage space by a horizontal bulkhead, and the horizontal bulkhead is provided with an outlet for discharging the initial excellent rainwater introduced into the upper excellent space into the lower sewage space, and the elevating means is provided at the discharge port. The buoyancy body is fitted to control the discharge port, but the buoyancy body is formed by the buoyancy tube of the upper and lower parts and the elevating rod in the middle, so that the buoyant body is lifted according to the amount of rain flowing in and the one side of the buoyancy cylinder is opened and closed to discharge the outlet. The purpose of the present invention is to provide an excellent control device.

In addition, the buoyancy body is to provide an excellent intermittent control device to facilitate the assembly and production by forming a lifting structure of the upper and lower buoyancy passage in the intermediate structure.

In addition, it is another object of the present invention to provide a rainwater arrester to the damage of the horizontal bulkhead and the buoyancy body by the impact by mounting a shock absorbing plate on the portion of the horizontal bulkhead formed with the buoyancy body and the outlet.

Manhole control device having a multi-structure according to the present invention for achieving the above object,

Inside the manhole The upper and lower parts are partitioned by horizontal bulkheads, and rainwater pipes are installed in the partitioned upper superior space, and sewage pipes are installed in the partitioned lower drainage space, and the horizontal bulkheads are installed in the outlets communicating upper and lower parts. A rainwater arresting device for a manhole having a multiple structure for regulating a flow path, comprising: a discharge port formed in a horizontal partition wall partitioning a space of a manhole up and down to drain the initial excellent water collected upward; The hollow part is formed inside the upper and lower buoyancy passages respectively placed in the upper superior space and the lower sewage space, connecting the upper and lower buoyancy cylinder is inserted and installed in the discharge port is composed of a lifting rod defining the lifting height, the upper and lower buoyancy cylinder A buoyancy body which is formed in a size larger than the outlet and closes the outlet in contact with the outlet when the valve is in the maximum rising position and the maximum falling position; It is installed on the upper surface of the horizontal bulkhead so as to contain the elevating buoyancy body to filter large foreign matter; is configured to include.

Hereinafter, with reference to the accompanying drawings of the rainwater arrestor of the manhole having a multi-structure of the present invention as described above in detail.

Figure 1a is a perspective view of a manhole having a multi-structure of the present invention, Figure 1b is a cross-sectional view of AA of Figure 1a, Figure 2 is a cross-sectional view showing an embodiment of the rain arrester according to the invention, Figures 3 to 5 6 is a cross-sectional view showing various embodiments of the buoyancy body according to the present invention, Figure 6 is a cross-sectional view showing a state in which the protective plate is mounted on the outlet of the horizontal bulkhead, Figure 7 is a rainwater arrestor according to another embodiment of the present invention 8 is a cross-sectional view illustrating a form in which a rubber plate is mounted on the horizontal bulkhead of the present invention, and FIG. 9 is a plan view showing a plurality of auxiliary outlets formed on the horizontal bulkhead according to the present invention, FIGS. 10A and 10B. 11 is a plan view showing another form of the horizontal bulkhead discharge port according to the present invention, Figures 11a to 11c is a cross-sectional view showing an operating state using the embodiment shown in Figure 1b.

As shown in FIGS. 1A and 1B, the manhole 10 having a multi-structure includes a housing 11 having an upper superior space 13 and a lower sewer space 14 therein, and a cover 12 formed on an upper portion of the housing. ), A horizontal partition wall 20 for partitioning the upper and lower spaces 13 and 14, the upper and lower spaces, and a rainwater control device 30 installed on the horizontal partition wall, and the partitioned upper rain space ( It is configured to include a rain pipe (60) communicated to 13 and the sewage pipe (70) installed in communication in the lower sewer space (14).

The cover 12 is formed with a plurality of through holes where rainwater is introduced from the outside. In addition, the horizontal partition wall 20 may be formed integrally with the housing 11 or separated. For example, since the housing is manufactured by the majority of concrete curing, the horizontal partition wall may be integrally formed when the housing is manufactured, or the horizontal partition wall may be separately cured to be installed inside the housing. In addition, the horizontal bulkhead may be made of a synthetic resin or metal material such as plastic having rigidity in addition to concrete.

In addition, the horizontal bulkhead 20 may be equipped with one or a plurality of rainwater control devices 30 to adjust the drainage path according to the rainwater flows in.

The rainwater arrester 30 is a buoyancy body 40 is installed in the outlet 21 formed in the horizontal partition wall, as shown in Figure 2 and the trapping mesh 50 is fixed to the horizontal partition wall containing the buoyancy body (50) Is done.

The outlet 21 is to drain the initial excellent water collected from the rain pipe (60) or the cover 12 to the lower sewage space (14), so that the up and down is made according to the rainwater flowing in the installed buoyancy body (40) , Substantially drainage of the outlet consists of a gap between the lifting rod 43 and the outlet 21 of the buoyancy body to be described later. Therefore, as the cross section of the outlet 21 is larger than the cross section of the elevating rod 43, the drainage rate is increased. Accordingly, the cross section of the upper and lower buoyancy cylinders 41 and 42 of the buoyancy body should be large. That is, when the cross-sectional area is compared, it is preferable that the lifting rods <discharge openings> are formed in the order of the upper and lower buoyancy cylinders so that the drainage from the upper excellent space 13 to the lower sewage space 14 and the discharge opening are easily performed.

Next, the buoyancy body 40 is raised and lowered by buoyancy is generated according to the level of rain or sewage, so that the buoyancy body 40 to block one side of the discharge port 21 when the maximum ascending position and the lowest falling position. By preventing the clear rainwater collected in the upper excellent space 13 to be discharged to the lower sewage space, or to prevent the sewage odor of the lower sewage space 14 to move to the upper excellent space (13).

Therefore, the buoyancy body 40 is formed in the form of a dumbbell having a narrow form in the middle so that the hollow portion (44, 44 ') is formed therein so that the buoyancy can be generated in accordance with the excellent amount and is elevated along the outlet 21 It is preferably formed. That is, the buoyancy body 40 forms upper and lower buoyancy cylinders 41 and 42 having hollow portions 44 and 44 'at upper and lower ends of the elevating rod 43 which is elevated along the outlet 21, respectively, to form an upper superior space ( 13) or according to the level of the lower sewage space 14 can be made to rise and fall.

For example, when the rainwater flowing into the upper superior space 13 is greater than the rainwater discharged to the discharge port, the rainwater is increased while the rainwater is stagnant in the upper excellent space, and buoyancy is generated in the upper buoyancy tube 41 due to the rising water level. The buoyancy body 40 is raised. At this time, the rising height is proportional to the difference between the depth of the outlet 21 and the length of the lifting rod 43, thereby adjusting the lifting rod length to set an appropriate height. When the buoyancy body 40 rises to the limit water level, the upper surface of the lower buoyancy cylinder 42 contacts the lower surface of the outlet 21 and closes the outlet, so that the clear rainwater flowing into the upper superior space 13 is separated from the upper excellent space. Discharge is made through the connected rain pipe (60). Therefore, the rainwater that is initially introduced contains various foreign matters and harmful substances so that the discharge is made through the sewage pipe 70 of the lower part and the clear rainwater after a predetermined time is discharged to the nearby river through the rainwater pipe 60 of the upper part. The selective discharge can be automatically made according to the degree of pollution of rainwater flowing into the upper superior space 13 of the manhole having a multi-structure.

Next, the strainer 50 is to prevent the outlet 21 from being blocked by the bulky float contained in the rainwater, which is to be filtered through the strainer before the float enters the outlet.

In addition, the strainer 50 may be in the form of a tubular body formed with a plurality of holes in the side in addition to the illustrated form. In the case of forming the tubular body, it is possible to obtain an effect of preventing the buoyancy body from being damaged by the excellent flow rate or the water pressure passing through the upper excellent space. In addition, when the floating body of the sieve 50, the maximum rise should have an internal space to have a height that does not interfere with the progress of the floating body, the horizontal bulkhead 20 using an anchor bolt 51 or other fixing means To combine.

In addition, the rainwater arrest device 30 is formed by the inlet 21 formed in the horizontal partition wall 20 and the inclined tapered surface of the upper and lower buoyancy cylinder (41, 42) in contact with the outlet port buoyancy is concentrated on the contact surface Watertightness can be improved. That is, the taper is formed on the contact surface of the outlet 21 and the upper and lower buoyancy cylinders 41 and 42 at the same angle to improve the watertightness by making the outlet 21 and the upper and lower buoyancy cylinders 41 and 42 strongly adhere to each other.

Meanwhile, as shown in FIG. 3, the buoyancy body 40 in which the selective discharge of rainwater is made is the upper buoyancy cylinder 41 in which the main buoyancy generating portion is placed in the upper superior space 13, and thus the volume of the hollow portion of the upper buoyancy cylinder is increased. It is formed to be larger than the hollow portion volume of the lower buoyancy cylinder is to enable a quick reaction according to the level of rainwater.

In addition, the buoyancy body 40 is the upper and lower buoyancy cylinders 41 and 42 and the lifting rod 43 is formed integrally as shown in Figure 3, or separately separated as shown in Figures 4 and 5 It may be in the form. That is, as shown in the embodiment of FIG. 4, female threaded portions 411 and 421 are formed in the upper and lower buoyancy cylinders 41 and 42, and male threads 432 are formed at both ends of the elevating rod 43 to form a screw coupling. Or, as shown in the embodiment of FIG. 5, the upper and lower buoyancy cylinders 41 and 42 are provided with male thread portions 412 and 422, and both ends of the elevating rod 43 are formed with female threaded portions 431 to be screwed together. Can be. In addition, although not shown, each member may be assembled and used in various forms, such as forming a groove on one side of the upper and lower buoyancy cylinders and the lifting rods, and coupling the other members in a manner such as interference fit.

In addition, the lifting rod 43 is formed of stainless steel with high durability to prevent the lifting rod 43 from being worn or damaged by vibration and water pressure transmitted during lifting or discharge of rain, and also preventing corrosion by fluid. can do.

In addition, as shown in FIG. 6, the outlet 21 in which the buoyancy body 40 is installed and ascended is equipped with a high rigidity protection plate 211 to be hit by the impact shock and abrasion generated during the elevation process of the buoyancy body 40. The horizontal bulkhead 20 may be prevented from being damaged. At this time, the protective plate 211 is the inner surface of the outlet 21 and the surface of the horizontal partition wall 20 adjacent to the outlet, that is, the surface in contact with the lifting rod 43 of the buoyant body and the upper and lower buoyancy cylinder (41, 42) It is preferable to be provided in the part containing all. As described above, the protection plate 211 installed at the outlet 21 is configured to prevent the horizontal bulkhead from being damaged by the impact. The protection plate 211 may absorb the shock or vibration by installing the stainless steel or rubber pad.

On the other hand, Figure 7 shows another embodiment of the rain arrestor buoyancy body 40 'according to the present invention, the upper and lower buoyancy cylinders (41, 42) to form a cylindrical body, the lower surface of the upper buoyancy cylinder 41 The upper surface of the lower buoyancy cylinder 42 is in contact with the horizontal bulkhead 20 to open and close the outlet 21. At this time, the horizontal bulkhead 20 may be formed of a metal plate to increase the watertightness with the upper and lower buoyancy cylinders 41 and 42, and as shown in FIG. 8, the upper and lower buoyancy cylinders of the buoyant body for shock absorption and watertightness increase. A rubber shock absorbing plate 23 may be attached to one side or both sides of the upper and lower surfaces of the horizontal bulkhead 20 in contact with the 41 and 42. As shown in FIG. 6, the impact absorbing plate 23 is formed in a plate shape and attached to one side of the horizontal bulkhead, as shown in FIG. 6, and the entire contact surface between the outlet 21 and the upper and lower buoyancy cylinders 41 and 42. It may be provided in the form of covering.

In addition, as shown in FIG. 9, a plurality of auxiliary outlets 22 may be formed at adjacent portions of the outlet 21 to facilitate drainage to the lower sewage space 14. The discharge port 21 has a function of guiding the shanghaidong of the buoyancy lifting rod 43 in addition to the discharge function. Therefore, if the cross section of the outlet 21 is increased for the purpose of increasing the drainage amount to the lower sewage space 14, the lifting rod 43 is fluctuated on the plane in the outlet, so that the buoyancy body 40 is not easily moved. As the buoyancy body 40 or the horizontal bulkhead 20 may be damaged due to rocking, it is difficult to increase the outlet cross section indefinitely. Therefore, a method of forming a plurality of auxiliary outlets 22 around the outlet 21 to facilitate the discharge into the lower sewage space 14 can be applied. At this time, the auxiliary discharge port 22 is located within the contact area between the upper and lower buoyancy cylinders 41 and 42 and the horizontal bulkhead 20 so that the buoyancy body 40 'is located at the maximum ascending and minimum descending positions. 21 and the auxiliary outlet 22 are preferably closed.

In addition, the outlet 21 may form a cross-section of the outlet as a corrugation or irregularities having a plurality of bends as shown in FIG. 10A to secure the cross section of the outlet while supporting the buoyant body 40 to be elevated, and FIG. 10B. As described above, a plurality of auxiliary outlets 22 may be further formed around the corrugated or uneven outlet 21 to improve the drainage rate. In this case, the outlet 21 and the auxiliary outlet 22 having various cross-sectional shapes are positioned within the range where the upper and lower buoyancy cylinders 41 and 42 and the horizontal bulkhead 20 are in contact with each other. It is desirable to make it.

An example of the operation of the rain arrester having a multiple structure according to the present invention configured as described above will be described with reference to FIGS. 11A to 11C.

First, as shown in FIG. 11A, sewage flows through the sewer pipe 70 in the lower sewage space 14 of the manhole 10 having a multi-structure, and the rainwater interruption mounted on the horizontal partition wall 20 is performed. The device (30) is located in the lower sewage space (14) by causing the buoyancy body (40) to be positioned at the lowest position by its own weight so that the lower surface of the upper buoyancy cylinder (41) closes the upper side of the outlet (21). The odor of flowing sewage is blocked to rise to the upper excellent space (13). In addition, although not shown, the rain pipe is installed so as to be located close to the horizontal bulkhead, when a small amount of moisture is not introduced into the buoyancy body is moved to the upper superior space of the other adjacent manhole through the rain pipe, it is repeated If the buoyant body has a sufficient amount of buoyancy, the buoyant body can be moved upward and discharged to the lower sewage space through the open outlet.

In addition, when the initial rainfall occurs as shown in FIG. 11B, the rainwater initially dropped is a manhole cover 12 and an upper portion formed on both sides of the road by containing various pollutants such as waste, dust, and harmful chemicals accumulated in the road. Through the rain pipe 60 connected to the rain space 13 is introduced into the upper rain space 13 of the manhole having a multi-structure. The upper excellent space 13 collects rainwater introduced through the rain pipe 60 in communication with the manhole adjacent to the cover 12 described above, and the buoyancy body 40 installed in the manhole horizontal partition wall 20 is collected. Buoyancy is generated in the upper buoyancy cylinder 41 by the initial excellent rise and open the outlet 21. Therefore, the initial rainwater collected through the open outlet 21 is discharged to the lower sewage space 14 and is recollected to the sewage treatment plant through the sewage pipe 70 installed in communication with the lower sewage space, and discharged after the sewage treatment process. To lose.

Next, when there is a lot of rainfall, the buoyancy generated in the upper buoyancy tube 41 is increased as the level of rainwater collected in the upper superior space 13 is increased as shown in FIG. 11C, so that the buoyancy body 40 is the highest. When the upper surface of the buoyancy body lower buoyancy tube 42 is in contact with the outlet 21 of the horizontal bulkhead to close the outlet, the excellent rainwater collected in the upper excellent space 13 is an excellent pipe (60). To be discharged to adjacent streams.

In addition, when the amount of sewage discharged through the lower sewage space 14 is increased, the sewage level of the lower sewage space is increased, so that buoyancy is generated in the lower buoyancy tube 42 of the buoyancy body 40, thereby providing buoyancy body 40. When the sewage of the lower sewage space 14 is filled with water, the lower buoyancy cylinder 42 of the buoyancy body is in contact with the lower surface of the horizontal bulkhead 20 to block the outlet 21 so that the lower sewage space ( The sewage flowing to 14 may be prevented from flowing back to the upper superior space 13.

As described above, the stormwater control device 30 according to the present invention is discharged to a nearby sewage treatment plant through the sewage pipe 70 of the lower sewage space 14 to be discharged after purification. Low rain and heavy rainfall in the middle and high rainwater is discharged to adjacent rivers using rain pipes 60 of the upper rainwater space 13, thereby reducing the amount of sewage flowing into the sewage treatment plant, thereby reducing the cost of sewage treatment. Efficient drainage is achieved to ensure that

As described in detail above, the manhole rainwater arrester having a multi-structure of the present invention,

The inside of the manhole is partitioned into an upper superior space and a lower sewage space by a horizontal bulkhead, and the horizontal bulkhead is provided with an outlet for discharging the initial excellent rainwater introduced into the upper excellent space into the lower sewage space, and the elevating means is provided at the discharge port. The buoyancy body is fitted to control the discharge port, but the buoyancy body is formed by the buoyancy tube of the upper and lower parts and the elevating rod in the middle, so that the buoyant body is lifted according to the amount of rain flowing in and the one side of the buoyancy cylinder is opened and closed to discharge the outlet. can do.

In addition, the buoyancy body is easy to assemble and produce by forming a removable structure of the upper and lower buoyancy and the intermediate lifting rod, the shock absorbing plate is mounted on the interview portion of the horizontal bulkhead formed with the buoyancy body and the discharge port to prevent impact and wear Damage of horizontal bulkhead and buoyancy body can be prevented.

Therefore, in the present invention, the first rainwater contaminated by a simpler structure is treated and discharged from a sewage treatment plant such as sewage, and a large amount of uncontaminated clear rainwater in the middle and middle of the rainfall is discharged to a nearby stream. It is possible to provide a useful device that can reduce the sewage treatment cost by making the rainwater discharge path differently.

In addition, the above-mentioned example is only an example to demonstrate this invention. Therefore, it is obvious that the ordinary skilled in the art to which the present invention pertains uses the partial change with reference to the detailed description.

Claims (10)

The upper and lower portions of the manhole 10 are partitioned by horizontal partition walls 20, rainwater pipes 60 are installed in the upper superior space 13, and sewage pipes 70 are disposed in the lower sewer spaces 14, respectively. In the manhole rainwater control device having a multi-structure is installed in communication, and installed in the outlet 21 for communicating the upper and lower portions in the horizontal bulkhead to control the rainwater flow path according to the rainwater amount, An outlet 21 formed in the horizontal partition wall 20 partitioning the inner space of the manhole up and down to drain the initial excellent water collected into the upper excellent space 13 into the lower sewage space 14; Hollow parts 44 and 44 'are formed therein, and the upper and lower buoyancy cylinders 41 and 42 which are respectively placed in the upper superior space 13 and the lower sewage space 14 are connected to the upper and lower buoyancy cylinders. The lifting rod 43 is inserted and installed to limit the lifting height, and the upper and lower buoyancy cylinders 41 and 42 are formed to have a size larger than the outlet 21 so that they are located at the maximum ascending and maximum descending positions. A buoyancy body 40 in contact with 21 to close the outlet; The manipulator of the manhole having a multi-structure, characterized in that it comprises a; is installed on the upper surface of the horizontal bulkhead 20 so as to contain the elevating buoyancy body (40) to filter large foreign matter. The method of claim 1, The surface of the outlet 21 and the buoyancy upper and lower buoyancy cylinder (41,42) in contact with the outlet 21 is formed of an inclined tapered surface so that the buoyancy is concentrated on the contact surface to improve the watertightness of the manhole having a multi-structure Stormwater arrester. The method of claim 1, The buoyancy body 40 has a multi-structure, characterized in that the lower surface of the upper buoyancy cylinder 41 and the upper surface of the lower buoyancy cylinder 42 in contact with the horizontal partition wall 20 so that the outlet 21 is closed. Manhole arrester. The method of claim 2, On the side of the discharge port 21 of the horizontal bulkhead is equipped with a protective plate 211, a multi-structure characterized in that the horizontal bulkhead 20 is prevented from being damaged from the impact shock and wear caused by the lifting of the buoyancy body 40 Manipulator of manhole having. The method of claim 2 or 3, The hollow portion 44 of the upper buoyancy cylinder 41 is formed larger than the hollow portion 44 'of the lower buoyancy cylinder 42, so that the multi-structure characterized in that it is easily lifted by the buoyancy of the upper buoyancy cylinder Manipulator of manhole having. The method of claim 2 or 3, The upper buoyancy cylinder 41 and the lower buoyancy cylinder 42 are formed with female threaded portions 411 and 421, and male threaded portions 432 are formed at both ends of the lifting rod 43 so that the upper buoyancy cylinder and the lower buoyancy cylinder are formed. Manhole control device having a multiple structure, characterized in that the screwing to the lifting rod (43). The method of claim 2 or 3, Male threads 412 and 422 are formed in the upper buoyancy cylinder 41 and the lower buoyancy cylinder 42, and female threads 431 are formed at both ends of the lifting rod 43. Manhole control device of the manhole having a multi-structure, characterized in that the upper buoyancy cylinder and the lower buoyancy cylinder is screwed to the lifting rod (43). The method of claim 3, wherein The mandrel of the manhole having a multiple structure, characterized in that a plurality of auxiliary outlets (22) are formed in close proximity to the outlet (21) on the surface of the horizontal bulkhead (20) in contact with the surface of the upper and lower buoyancy (41, 42). The method of claim 3, wherein The discharge port 21 of the horizontal bulkhead is a manhole rainwater control device having a multiple structure, characterized in that formed in the form of a wave having a plurality of curves in the range in contact with the surface of the upper and lower buoyancy cylinder (41,42). The method of claim 3, wherein The horizontal bulkhead 20 is further provided with a shock absorbing plate 23 on the surface in contact with the buoyancy body 40 of the manhole having a multi-structure characterized in that to absorb the impact shock caused by the lifting of the buoyancy body to be relaxed Stormwater arrester.

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