JP4924969B2 - Pressure release device in the sewer line - Google Patents

Description

  In the so-called combined sewer system in which rainwater and sewage flow in the same pipeline, the present invention releases pressure in the sewage pipeline that is generated on the downstream side due to a temporary large inflow of rainwater during heavy rainfall. The present invention relates to a pressure relief device in a sewer line.

Conventionally, there are two types of sewerage: the combined sewerage system that treats domestic sewage and rainwater through the same pipe line, and the diverted sewer system that processes through separate pipe lines. Manholes for people to enter and exit are installed for the purpose of, etc.In addition, the above-mentioned combined sewer system is provided to avoid obstacles when a large amount of rainwater flows into the sewer line due to heavy rain. The air pressure and water pressure in the pipe line locally increase suddenly in a place where the flow is likely to stagnate, such as in front of the detour pipe line, thereby increasing the pressure in the manhole, and a lid that closes the surface opening of the manhole. There was a problem that it was thrown away and there was a risk of danger to passers-by and vehicles.

In order to solve such a problem, a vent hole is provided in a manhole cover, and a check valve that is opened by pressure in the manhole is provided to release air when the manhole is pressurized (for example, Patent Document 1). ), Or an exhaust passage communicating with a side wall of a manhole, and the exhaust passage is opened in a water collecting trough of a road side groove (Patent Document 2).
JP-A-11-280096 JP-A-11-280095

  However, in the conventional pressure release device in the sewer pipe as described above, as in Patent Document 1, if the manhole cover is provided with a pressure release valve, the manhole cover itself is a normally closed reverse. A double structure consisting of the part where the stop valve structure is installed and the top cover that forms the road surface of the roadway, and the overall weight must be extremely large, and it is extremely difficult to manually open and close as in the past. There is.

  In addition, as in Patent Document 2, in the structure in which the exhaust passage communicated with the manhole is connected to the water collecting basin, a large amount of water flows into the water collecting basin when there is a heavy rainfall, so that a sufficient pressure releasing effect is obtained. Since it is not possible to shut off odors from the sewer, it is necessary to provide a valve in the exhaust passage. However, if a mechanical check valve is installed in the catchment where rainwater flows in every rain, Then, there is a problem that it is difficult to maintain this functioning sufficiently.

  In view of the conventional problems as described above, the present invention has the same structure as the manhole itself, and even when a large amount of rainwater flows into the sewage pipe due to heavy rain, the pressure in the pipe is appropriate. It was made for the purpose of providing a pressure relief device in a sewer pipe that can be released in a sewer line and is easy to maintain and can be installed at a relatively low cost without requiring a large space. is there.

In order to solve the above-mentioned conventional problems and achieve the intended purpose, the invention according to claim 1 is characterized in that a pressure relief passage in which one end communicates with a sewer pipe and the other end can be opened to the atmosphere. And a check valve that opens and closes the pressure release path, and the pressure in the sewer line is such that the check valve is opened by the pressure increase in the pressure release path, and the pressure release path is released to the atmosphere. In the opening device,
At the atmospheric side end of the pressure relief path, a hollow pressure relief rod having an upper end exposed to the atmosphere side is provided.
Communicating the pressure relief passage to the bottom of the pressure relief ridge,
The pressure release pad is provided with a pressure release port on its upper surface, and the pressure release port is opened to the atmosphere through a breathable lid such as a grating or a perforated plate.
In the pressure release cage, a silencer layer is provided above the communication part of the pressure release path,
The check valve is configured to have a normally closed flap valve that partitions the upper side of the sound deadening material layer and the pressure release port and is opened by pressurization from the inside of the pressure release path. .

The feature of the invention described in claim 2 is that, in addition to the structure of claim 1, a partition wall is provided on the upper side of the sound deadening material layer of the pressure release pad to partition the inside of the pressure release pad up and down.
The check valve includes a flap valve that opens and closes a vent hole formed in the partition wall .

According to a third aspect of the present invention, in addition to the configuration of the second aspect, the partition wall has a plate-like material formed or assembled into a shape in which one plate is bent into a V-shaped cross section. The flap type valve is attached to the inclined upper surface side so as to be openable upward, and the flap valve body constituting the flap type valve is brought into the normally closed state by its own weight.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, the V-shaped valley bottom portion of the partition wall having the V-shaped cross section and the inside of the pressure release bottom portion of the sound deadening material layer are provided. Is formed on the inner surface of the pressure release pad.

According to a fifth aspect of the present invention, in addition to the configuration of the first aspect, the pressure release pad is integrally provided with a plurality of distributed pressure release chambers on a side portion above a portion where the sound deadening material layer is accommodated. to provided, comprising each said release pressure port on the upper surface of the dissipating chamber lies in having the check valve between the discharge pressure chambers in said dispersion release pressure chamber.

According to a sixth aspect of the present invention, in addition to the structure of any one of the first to fifth aspects, the silencer layer is formed by laminating curled metal bands or linear metal cutting scraps in layers. It is in the structure.

The pressure relief device in the sewer pipe according to the present invention comprises a pressure relief path having one end communicating with the sewer pipe and the other end openable to the atmosphere, and a check valve for opening and closing the pressure relief path , The check valve is opened by the pressure rise in the pressure release path, and the pressure release path is released to the atmosphere so that the upper end of the pressure release path is exposed to the atmosphere and the upper end is exposed to the atmosphere side. A pressure relief opening is provided on the upper surface of the pressure release ridge, and the pressure relief opening is provided with a breathable lid such as a grating or a perforated plate. The pressure release pad is provided with a sound deadening material layer above the communicating part of the pressure release passage, and the check valve is disposed between the pressure deadening material layer and the pressure release port. the partition, by which is configured with a normally-closed flap type valve which is opened by the pressure from the pressure discharge path inside, sewer pipe The pressure port can be installed in a place other than the manhole with a simple structure, and even if a large amount of rainwater flows into the sewer sluice due to heavy rain, the pressure in the sewage pipe is kept constant. It is possible to prevent the manhole cover from being blown off by pressure.

In addition, a partition wall for vertically partitioning the inside of the pressure release cage is provided above the sound deadening material layer of the pressure release cage, and the check valve has a flap valve that opens and closes a vent hole formed in the partition wall. By comprising , a required component can be stored compactly in a cage.

Furthermore, the partition wall is configured by holding a plate-like material molded or assembled into a shape in which a single plate is bent into a V-shaped cross section, and the flap valve can be opened upward on the inclined upper surface side. The structure of the flap type check valve can be maintained in the closing direction by the dead weight of the valve body by being normally closed by the dead weight of the flap valve body constituting the flap type valve. It becomes.

Furthermore, by forming a water passage for communicating the V-shaped valley bottom of the partition wall having the V-shaped cross section with the inside of the pressure release bottom of the sound deadening material layer on the inner surface of the pressure release pad. The rainwater entering from the pressure release port at the upper end of the ridge can be allowed to flow without passing through the sound deadening material layer, and the sound deadening material layer can be prolonged.

Further, the pressure release basin is integrally provided with a plurality of distributed pressure release chambers on the side portion above the portion in which the sound deadening material layer is accommodated, and the pressure release port is provided on the upper surface of the pressure release chamber. Since the check valve is provided between the pressure release cage and the dispersion pressure release chamber, the released pressure is dispersed, and the release of the pressure, that is, the ejection of air can be reduced.
Furthermore, the silencing material layer is formed by layering curled metal strips or linear metal cutting scraps in layers, so that waste materials generated in a metal processing factory can be used almost without processing. In addition, the cutting scrap often has a sharp edge, and an effective silencing action is obtained.

  Next, a pressure relief device in a sewer pipe according to the present invention will be described based on an embodiment shown in the drawings.

  First, a first embodiment of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 is a sewer line, 1a is a manhole, and 2 is a pressure release line that is communicated with a desired position of the sewer line 1 and extended to the ground side. The pressure release path 2 is installed in a part where the pressure in the sewer line is likely to be increased during a heavy rain, such as a part where sewage tends to stay downstream or a curved part where water flow resistance increases.

  The ground side end portion of the pressure release path 2 communicates with a pressure release cage 3 that is exposed and buried on the ground. As shown in FIGS. 2 to 7, the pressure release cage 3 is formed in a rectangular tube with a bottom having a square cross section, and the upper end of the pressure release path 2 is open at the center of the bottom. The pressure release cage 3 may be installed by carrying in a precast concrete product manufactured in a factory and burying it, or may be molded by on-site construction using concrete in the site.

  A bottom cover 4 made of a grating for preventing objects from falling from the opening of the pressure release passage is applied to the bottom of the pressure release basket 3, and the sound deadening material layer 5 is entirely cross-sectioned inside the pressure release bowl 3. It is installed in a closed configuration. The sound deadening material layer 5 is fixed by upper and lower brackets 6 and 6 fixed to the inner peripheral surface of the pressure release cage 3, and has a large air permeability made of a grating or a metal mesh at the upper and lower open portions of the ring-shaped outer frame 7. Upper and lower surface constituent members 8 and 8 are fixed, and curled linear metal cutting generated in metal processing by a lathe or other metal cutting machine in an internal space surrounded by the outer frame 7 and the upper and lower surface constituent members 8 and 8. The scraps 9 are filled and filled with a large air permeability.

A partition wall 10 is provided above the sound deadening material layer 5 in the pressure release cage 3 to partition the pressure release cage 3 up and down. The partition wall 10 is composed of a pair of inclined plate portions 10a and 10b arranged so that one plate member is bent in a V shape at the center thereof. Then, concave portions 11 and 11 recessed downward are formed at both ends of the bottom of the V shape, and vertical grooves 12 and 12 for rainwater flow are formed on the inner surface of the pressure release ridge facing the concave portions 11 and 11, respectively. It is provided in a continuous arrangement up to the lower side of the layer 5, thereby forming a water passage that communicates the bottom of the valley with the inside of the pressure release bottom of the sound deadening material layer.
The rainwater that has flowed onto the partition wall 10 passes through a water passage formed by the recessed portion 11 and the vertical groove 12, and flows downward while avoiding the inside of the sound deadening material layer 5.

The partition wall 10 is provided with a check valve configured with a flap valve . That is, the two inclined plate portions 10a, 10b of the partition wall 10 are opened with two horizontal rows of window holes 13, 13 in the horizontal direction, and flap valve bodies 14 are provided above the window holes 13, respectively. It is pivotally supported on the upper edge of each window hole 13, and the window hole 13 is closed by the flap valve body 14, and the virtual pressure in FIG. As shown by the line, it is attached so as to be operable up to an angle close to vertical, and the state in which the window hole 13 is closed by the dead weight of the flap valve body 14 is normally maintained.

  The upper end opening of the pressure release cage 3 is a pressure release port 16, which is covered with a breathable lid 15 by grating. As the air-permeable lid, besides a grating, a wire mesh or a perforated plate having a large air permeability can be used.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same part as 1st Example mentioned above, and duplication description is abbreviate | omitted.

In this embodiment, distributed pressure relief chambers 20 and 20 are provided on the upper half of the pressure relief basket 3, that is, on both side surfaces above the portion where the sound deadening material layer 5 is accommodated . In addition, you may provide this dispersion | distribution pressure release chamber 20 in the other surface similarly other than two of the both sides | surfaces of the pressure release ridge 3. FIG. Each of the dispersion pressure release chambers 20 and the inside of the pressure release cage 3 communicate with each other through a window hole 21, and the inside of the dispersion pressure release chamber 20 of the window hole 21 is closed by a flap valve body 22. .

A valve seat surface 23 whose upper side is inclined toward the inside of the pressure release rod 3 is formed on the side of the dispersion pressure release chamber 20 of the window hole 21, and the upper end side of the flap valve body 22 is pivotally supported. The window hole 21 is closed by coming into contact with the surface 23 and is opened by pressurization from the inside of the pressure release cage 3, thereby constituting a check valve .

  A pressure release port 24 is opened on the upper surface of each dispersion pressure release chamber 20, and a breathable lid 25 made of grating is applied to the pressure release port 24. In addition, a work port 26 is opened at the upper end of the pressure release basket 3 and is closed with an air-impermeable lid 27 so as not to be opened by internal pressure.

  The pressure release passage 2 is opened to the bottom of the pressure release basket 3 in the same manner as in the first embodiment described above, and the sound deadening material layer 5 is also installed on the upper side. In the figure, 28 is a rainwater flow hole.

It is sectional drawing which shows the outline of the sewer installation provided with the pressure release apparatus of the 1st Example which concerns on this invention. It is a top view of the 1st Example of the pressure release apparatus which concerns on this invention in FIG. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is CC sectional view taken on the line in FIG. It is the DD sectional view taken on the line in FIG. It is the EE sectional view taken on the line in FIG. FIG. 3 is a perspective view of a sound deadening material layer portion used in the first embodiment shown in FIG. 2. It is a longitudinal cross-sectional view of the second embodiment of the pressure release device according to the present invention. It is the FF sectional view taken on the line in FIG. It is the GG sectional view taken on the line in FIG.

DESCRIPTION OF SYMBOLS 1 Sewer pipe line 2 Pressure release path 3 Pressure release pad 4 Bottom cover 5 Sound deadening material layer 6 Bracket 7 Outer frame 8 Upper and lower surface component 9 Metal cutting waste 10 Partition walls 10a and 10b Inclined plate part 11 Recessed part 12 Vertical groove 13 Window Hole 14 Flap valve body 15 Breathable lid 16 Pressure release port 20 Dispersion pressure release chamber 21 Window hole 22 Flap valve body 23 Valve seat surface 24 Pressure release port 25 Breathable lid 26 Work port 27 Lid 28 Rainwater flow hole

Claims (6)

One end is connected to a sewer pipe, and the other end is provided with a pressure release path that can be opened to the atmosphere, and a check valve that opens and closes the pressure release path, and the check valve opens when the pressure in the pressure release path increases. , In a pressure relief device in a sewer line in which the pressure relief passage is released to the atmosphere ,
At the atmospheric side end of the pressure relief path, a hollow pressure relief rod having an upper end exposed to the atmosphere side is provided.
Communicating the pressure relief passage to the bottom of the pressure relief ridge,
The pressure release pad is provided with a pressure release port on its upper surface, and the pressure release port is opened to the atmosphere through a breathable lid such as a grating or a perforated plate.
In the pressure release cage, a silencer layer is provided above the communication part of the pressure release path,
The check valve is configured with a normally closed flap valve that partitions the upper side of the silencer layer and the pressure release port and is opened by pressurization from the inside of the pressure release path. A pressure relief device in the sewer line. On the upper side of the sound deadening material layer of the pressure release pad, provided with a partition wall that partitions the pressure release pad up and down,
The pressure release device in the sewage pipe line according to claim 1, wherein the check valve is configured with a flap valve that opens and closes a vent hole formed in the partition wall . The partition wall has a plate-like material formed or assembled into a shape in which a single plate is bent into a V-shaped cross section, and the flap valve is attached to the inclined upper surface side so as to be opened upward. The pressure release device in the sewer pipe line according to claim 2, wherein the flap valve body is normally closed by its own weight. A water passage that connects the V-shaped valley bottom of the partition wall having the V-shaped cross section and the inside of the pressure release bottom of the sound deadening material layer is formed on the inner surface of the pressure release pad. 3. A pressure relief device in the sewer line according to 3. The pressure release pad is provided integrally with a plurality of distributed pressure release chambers on the side portion above the portion in which the sound deadening material layer is accommodated, and the pressure release port is provided on the upper surface of the pressure release chamber , 2. The pressure release device in a sewer pipe according to claim 1, wherein the check valve is provided between the pressure release tank and the dispersion pressure release chamber. The pressure-reducing device in a sewer pipe according to any one of claims 1 to 5, wherein the sound deadening material layer is formed by laminating curled metal bands or linear metal cutting scraps in layers.

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