JP4073568B2 - Manhole cover with intake / exhaust device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manhole cover with an intake / exhaust device that can cope with rapid fluctuations in air pressure and water pressure in a pipe rod and can prevent scattering.
[0002]
[Prior art]
Conventionally, as this type, there are those shown in FIGS. 6 and 7 shown in Japanese Utility Model Application Publication No. 62-5102.
[0003]
Referring to FIGS. 6 and 7, the scattering prevention device 18 for the manhole cover 2 has an exhaust port 6 and an intake port 8 opened in the bottom plate 5 of the container-shaped inner lid 4, and the manhole receiving frame 1 has a manhole. In the case of the inner lid 4 attached integrally with the lid 2 by the clamp 15, the exhaust port 6 of the bottom plate 5 of the inner lid 4 is closed by its own weight when the inside of the pipe becomes high due to an excessive amount of inflowing water or the like. The exhaust door 7 is lifted while rotating upward about the rotary rod 10 to open the exhaust port 6, so that air flows into the inner lid 4 from the exhaust port 6 and is discharged from the exhaust hole 3 of the manhole cover 2 to the atmosphere. Released into. And if the pressure difference inside and outside becomes small, the exhaust door 7 will rotate downward by its own weight, and will close the exhaust port 6 again. Reference numeral 13 denotes a handle used when the inner lid 4 is attached / removed.
[0004]
In addition, when the pressure inside the pipe becomes negative and the flow of water becomes worse, the outside air flows into the inner lid 4 from the exhaust hole 3 of the manhole cover 2 and moves downward through the intake port 8 of the bottom plate 5 of the inner lid 4. The air intake door 9 that has been closed is rotated downward about the rotary rod 11 while the air intake port 8 of the bottom plate 5 is opened and flows into the pipe. When the pressure difference between the inside and the outside becomes small, it is turned upward by the force of the weight 12 to close the intake port 8 again.
[0005]
Although rainwater flows in from the exhaust hole 3 of the manhole cover 2, the rainwater that flows in flows into the pipe from the intake port 8 while pushing down the intake door 9 in the same manner.
[0006]
[Problems to be solved by the invention]
However, the conventional manhole cover scattering prevention device 18 is configured separately from the manhole cover 2 mainly composed of strength and the inner lid 4 provided with an air intake and exhaust device for preventing scattering. Therefore, the maintenance of manholes has the problem of having to open two lids, and has a problem that the structure is complicated and expensive.
[0007]
Further, since the manhole cover 2 and the inner cover 4 are stored and transported and assembled as separate parts, there is a problem that the number of work steps for assembly is required.
[0008]
In view of this, the present invention provides an intake / exhaust device that is fastened with an air intake / exhaust device integrally with a manhole cover, is easy to maintain, has a simple structure, is lightweight and inexpensive, and can reduce the number of assembly work. It is intended to provide a manhole cover with a cover.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is a container-like shape having a manhole cover having a plurality of exhaust holes formed therein and a fastening portion provided on the back surface, and a mouth portion fastened to the fastening portion. Rutotomoni assembled together a body and a gas supply and exhaust means for become more shatterproof that the intake and exhaust valves of the intake and exhaust ports pivotally closed provided to the body via the engagement portion, the manhole A plurality of struts are projected from the back side of the lid, and are surrounded by the strip material provided so as to connect the tips of the struts beyond the intake / exhaust device .
[0010]
By adopting the above configuration, the manhole cover has an intake / exhaust mechanism, and can cope with rapid fluctuations in air pressure and water pressure in the pipe rod. In addition, maintenance and management are facilitated by integration.
In addition, the strip material surrounded by the intake / exhaust device serves as a protector, so that protection can be achieved when the intake / exhaust device collides.
[0011]
The invention described in claim 2 rotates a manhole cover provided with a plurality of fastening portions on the back surface, a container-like main body having a mouth portion fastened to the fastening portion, and an intake / exhaust port provided in the main body. Each intake / exhaust device for preventing scattering consisting of an intake valve and an exhaust valve that can be closed together is integrally assembled via the fastening portion, and corresponding to each mouth of each intake / exhaust device, Rutotomoni provided an exhaust hole which penetrates the manhole cover, to protrude a plurality of struts from the back side of the manhole cover, beyond the intake and exhaust device with strip material provided to connect the front end portion of the strut surrounds It is characterized by that.
[0012]
By adopting the above configuration, the intake / exhaust device can be miniaturized, and as many intake / exhaust devices can be assembled as necessary. Is also easier.
In addition, the strip material surrounded by the intake / exhaust device serves as a protector, so that protection can be achieved when the intake / exhaust device collides.
[0013]
The invention described in claim 3 is the manhole cover with an intake / exhaust device according to claim 1 or 2, wherein the main body of the intake / exhaust device is a tubular body.
[0014]
By adopting the above-described configuration, the intake / exhaust device can be manufactured by machining directly from a commercially available pipe material in addition to casting and molding synthetic resin.
[0015]
According to a fourth aspect of the present invention, in the manhole cover with an intake / exhaust device according to any one of the first to third aspects, the exhaust port provided in the intake / exhaust device is positioned above the intake port. In addition, the intake / exhaust port peripherally contacts the intake / exhaust valve from above at an appropriate angle.
[0016]
With the above configuration, the intake port can be commonly used for drainage of rainwater, and at the same time, the intake and exhaust ports can be normally sealed by the intake and exhaust valves.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
[0020]
[ Reference example ]
A manhole cover with an intake / exhaust device according to a reference example of the present invention will be described with reference to FIGS. 1 and 2.
[0021]
FIG. 1 is a partially cutaway plan view showing a manhole cover with an intake / exhaust device. 2 is a cross-sectional view of the main part of FIG.
[0022]
1 and 2, 20 is a manhole cover with an intake / exhaust device, 21 is a manhole cover, 22 is an exhaust hole provided in the manhole cover 21, 30 is an intake / exhaust device assembled integrally with the manhole cover 21, and 31 is A container-like main body having a mouth portion 31 </ b> A that opens at the top, and an exhaust port 32 and an intake port 34 are formed on the side surface of the main body 31.
[0023]
An exhaust valve 33 that closes the exhaust port 32 is attached to the exhaust port 32 via a hinge 33 a so as to rotate toward the inside of the main body 31.
[0024]
On the other hand, an intake valve 35 that closes the intake port 34 is attached to the intake port 34 via a hinge 45 a so as to rotate toward the outside of the main body 31.
[0025]
Further, the contact surfaces are provided with appropriate angles so that the valves 33 and 35 are closed in contact with the air ports 32 and 34, respectively. Therefore, the inside of the pipe rod can be sealed and cut off only by its own weight at this contact surface.
[0026]
Further, the intake / exhaust valves 33 and 35 are mounted at positions where the exhaust port 32 is higher than the intake port 34, and the bottom surface of the main body 31 is inclined toward the intake port 34. Accordingly, rainwater or the like that has entered from the exhaust hole 22 of the manhole cover 21 flows toward the intake port 34, and the accumulated water pushes the intake valve 35 open and flows into the pipe so that it also serves as drainage.
[0027]
Reference numeral 24 denotes a clamp for the manhole cover 21. A plurality of clamps 24 are provided on the back side of the manhole cover 21. The engagement is provided by rotating from the upper surface side of the manhole cover 21 and surrounding the receiving frame 23. It is set as the structure engaged with the groove part 23a.
[0028]
The main body 31 configured in this manner is integrally assembled by fastening the fastening portion provided at the mouth portion 31 </ b> A of the main body 31 to the fastening portion 21 </ b> A provided at the periphery of the back surface of the manhole cover 21.
[0029]
As in the first embodiment, the fastening method may be such that a screw is provided on the peripheral edge of the back surface of the manhole cover 21 and a screw is provided on the mouth portion 31A of the intake / exhaust device 30 to be screwed together. In addition, the mouth portion 31A of the main body 31 may be thickened, a flange may be formed, a screw portion may be provided, and bolts may be fastened from the manhole cover 21 side.
[0030]
Next, the effect | action is demonstrated about the manhole cover 20 with the intake / exhaust apparatus comprised as mentioned above.
[0031]
In other words, the intake / exhaust manhole cover mounted so as to be fitted in the receiving frame 23 is subject to pressure from below due to a rise in water pressure or air pressure in the manhole or sudden rise of pressurized air remaining in the pipeline facility. In the case of exhaust, the exhaust valve 33 is rotated from the hinge 33a in the direction of arrow a to open the exhaust port 32, exhausted into the atmosphere from the exhaust holes 22 provided in the manhole cover 21, and rapidly decompressed. It works so as to prevent the lid 21 from floating and scattering.
[0032]
On the contrary, when the water level in the pipe drops to a negative pressure state and the flow of water deteriorates, the intake valve 35 is sucked into the pipe inside due to the pressure difference with the outside air, and the direction of the arrow b The air is sucked from the exhaust hole 22 of the manhole cover 21 and sent into the tube so that the negative pressure state is eliminated and the flow of water in the tube is improved.
[0033]
When the intake / exhaust valves 33, 35 are operated in this way and the sudden fluctuations in air pressure are cured, the intake / exhaust valves 33, 35 are all returned to their original positions, and as usual, the intake / exhaust ports 32, 35, 34 is closed and can be isolated from the inside of the tube. Therefore, it is possible to block noise such as odor and running water sound in the pipe. In addition, it is possible to seal the entrance and exit of mosquitoes and moths.
[0034]
Embodiment
Will be described with reference to FIGS. 3 and 4 show an intake and exhaust device with manhole covers according to the shape condition of the present invention.
[0035]
FIG. 3 is a partially cut-away plan view showing a manhole cover with an intake / exhaust device. 4 is a cross-sectional view of the main part of FIG.
[0036]
3 and 4, 40 is a gas supply and exhaust means equipped (three in the form status of this embodiment) plurality the manhole cover, the intake and exhaust device 40 of the body 41, 42 is an exhaust port, 43 The exhaust valve that closes the exhaust port 42 rotates toward the inside of the main body 41 via the hinge 43a.
[0037]
On the other hand, 44 is an intake port, and 45 is an intake valve that closes the intake port 44, and rotates toward the outside of the main body 41 via a hinge 45a.
[0038]
This intake / exhaust device 40 is a configuration in which the intake / exhaust device 30 of the reference example is reduced in size and can be mounted in plural, and a screw provided in the mouth portion 41A of the main body 41 is attached to an appropriate back surface of the manhole cover 211. A plurality of intake / exhaust devices 40 are fastened by screwing to a screw portion disposed at a position.
[0039]
And the exhaust hole 221 which penetrates is provided in each position of the manhole cover 211 which the opening 41A of each intake / exhaust device 40 opposes. Then, exhaust and intake air can pass through the exhaust hole 221.
[0040]
Further, since the protector 61 is provided so as to surround the intake / exhaust device 40, damage or the like is less likely to occur when the manhole cover 201 with the intake / exhaust device is stored, transported, or installed. Therefore, workability is improved.
[0041]
Other configurations and operations are the same as those of the reference example, and thus description thereof is omitted.
[0042]
(Modification)
FIG. 5 is a perspective explanatory view showing a modification of the intake / exhaust device of FIGS. 1 to 4.
[0043]
That is, the intake / exhaust device 50 in this modification has a main body 51 as a tubular body, a screw portion 51A is provided at the mouth of the tubular body, and the lower end portion is cut so as to be inclined and closed to form a bottom portion 51B. It is.
[0044]
An exhaust port 51a is formed at a slanting high position of the bottom 51B, and an exhaust valve 53 that can be rotated by a hinge 53a is obliquely attached to a slightly thin tubular exhaust pipe 52 so that the exhaust gas is exhausted inside the main body 51. The valve 53 is joined to the exhaust port 51a so as to open.
[0045]
Similarly, an intake port 51b is formed at a lower inclined position of the bottom 51A, and an intake valve 55 that can be rotated by a hinge 55a is obliquely attached to an intake pipe 54 of a slightly thin tubular body. The intake valve 55 is joined to the intake port 51b so that the intake valve 55 is opened.
[0046]
In addition, since both the intake and exhaust valves 53 and 55 are adapted to abut against the exhaust port 52 and the intake port 54 with the appropriate weight of the respective valves 53 and 55, they are always isolated from the inside of the pipe tube. In addition, noise such as odor and running sound in the pipe can be cut off.
[0047]
Since other structures and functions are the on purpose similar form, the description thereof is omitted here.
[0048]
In addition, as for the material used in each part of the above-described manhole cover with an intake / exhaust device, the manhole covers 21 and 211 are made of cast iron and have a tensile strength of about 25 MPa, and the intake and exhaust valves 33, 35, 43 are used. 45 are made of stainless steel in consideration of rust prevention.
[0049]
In addition, the intake / exhaust device main bodies 31 and 41 may be made of a resin material such as FRP which is not only made of cast iron but also has high impact and light weight and does not corrode.
[0050]
Furthermore, it is conceivable that the intake / exhaust device 50 shown in the modification is formed by machining or welding a extruded tube or plate material of vinyl chloride resin.
[0051]
【The invention's effect】
As described above, according to the invention of claim 1, the manhole cover and the air intake / exhaust device, which is a scattering prevention device, are assembled together, and the manhole cover itself can be prevented from scattering at the same time. It is lighter and cheaper and easier to maintain.
[0052]
In addition, the existing manhole cover that could be scattered could be easily replaced.
In addition, since a protector for the intake and exhaust devices is provided, it is less susceptible to damage during storage, transportation, and installation, making it easier to handle and improving workability.
[0053]
According to the invention of claim 2, since a plurality of small intake / exhaust devices are assembled, the intake / exhaust device is small and easy to manufacture, and at the same time, it is easy to assemble and the work man-hours can be reduced, and the cost can be reduced.
In addition, since a protector for the intake and exhaust devices is provided, it is less susceptible to damage during storage, transportation, and installation, making it easier to handle and improving workability.
[0054]
According to the invention of claim 3, since the main body of the intake / exhaust device is a tubular body, a commercially available stainless steel pipe, a polyvinyl chloride pipe or the like can be used, and it can be formed only by machining or joining. It became unnecessary and the cost was reduced.
[0055]
According to the fourth aspect of the present invention, the drainage of rainwater or the like entering from the exhaust hole provided in the manhole cover can be shared by the intake valve and smoothly drained.
[Brief description of the drawings]
FIG. 1 is a partially cut-away plan view showing a manhole cover with an intake / exhaust device according to a reference example of the present invention.
FIG. 2 is a cross-sectional view of a main part of FIG.
3 is a plan view Sekkaii partially showing an intake and exhaust device with manhole covers according to the shape condition of the present invention.
4 is a cross-sectional view of the main part of FIG. 3;
5 is a perspective view showing a modification of the intake and exhaust device according to the Reference Examples and the form status of the present invention.
FIG. 6 is a plan view with a part cut away showing a manhole cover splash prevention device according to the prior art.
7 is a cross-sectional view of the main part of FIG. 6;
[Explanation of symbols]
20 ... Manhole cover with intake / exhaust device
21 ... Manhole cover
21A ... Fastening part
22 ... Exhaust hole
30. Intake / exhaust device
31 ... Body
31A ... Mouth
32 ... Exhaust port
33 ... Exhaust valve
34 ... Inlet
35 ... Intake valve

Claims (4)

A manhole cover having a plurality of exhaust holes formed therein and a fastening portion provided on the back surface, a container-like main body having a mouth portion to be fastened to the fastening portion, and a suction / exhaust port provided in the main body are rotatably closed. Rutotomoni assembling a gas supply and exhaust means for become more shatterproof that the intake and exhaust valves are formed integrally through the fastening portion,
A manhole with an intake / exhaust device characterized in that a plurality of support columns project from the back side of the manhole cover and are surrounded by a strip provided so as to connect the tip portions of the support columns. lid. A manhole cover provided with a plurality of fastening portions on the back surface, a container-like main body having a mouth portion fastened to the fastening portion, and an intake valve and an exhaust valve that rotatably closes the intake / exhaust ports provided in the main body integrally assembled through each of the fastening portions each intake and exhaust device and the for become more scattering prevention which the said respectively corresponding to the mouth of the intake and exhaust device, Ru provided an exhaust hole penetrating in the manhole cover With
A manhole with an intake / exhaust device characterized in that a plurality of support columns project from the back side of the manhole cover and are surrounded by a strip provided so as to connect the tip portions of the support columns. lid.   The manhole cover with an intake / exhaust device according to claim 1, wherein the main body of the intake / exhaust device is a tubular body. The exhaust port provided in the intake / exhaust device is positioned above the intake port, and the intake / exhaust valve contacts the peripheral edge of the intake / exhaust port from above at an appropriate angle. The manhole cover with the intake / exhaust device according to any one of claims 1 to 3.

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