JP3821466B2 - Covering equipment for underground facilities - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a lid device for an underground facility.
[0002]
[Prior art]
In recent years, the sewerage business has been progressing rapidly, and the pipes of the huge underground facilities have been stretched around the basement of each municipality. Manholes are provided at various locations on the road to maintain and manage these pipes. In general, in a manhole, a receiving frame is fixed to the ground, and a lid is provided to be freely opened and closed via a hinge fitting. The lid is provided with a fluid hole in order to prevent a pressure increase in the manhole and the pipe line and to allow rainwater to flow down.
[0003]
However, there is a problem that malodor in the manhole flows out from the fluid hole of the lid. In particular,
When a large amount of rainwater flows into the underground pipeline due to torrential rain and so on, and so-called water hammer phenomenon occurs, a rapid pressure rise occurs in the manhole, which causes many accidents in which the manhole cover is scattered.
[0004]
The present applicant has previously developed the following apparatus which has solved this problem (Japanese Utility Model Publication No. 7-56358). That is, in a lid device of an underground facility in which an outer lid having a fluid hole penetrating vertically is opened and closed to the outer receiving frame via a hinge fitting, the inner lid receiving frame is placed on the inner lower portion of the outer receiving frame. ,
An inner lid having a valve port is placed on the upper side of the inner lid receiving frame, and an automatic valve is provided on the lower surface of the inner lid so as to face the valve port of the inner lid. A plurality of guide rods are provided at intervals in the circumferential direction of one of the inner lid receiving frame and the inner lid, and a guide hole is provided on the other.
[0005]
When an abnormal rapid lifting pressure is generated in the manhole, pressure is applied over almost the entire area of the inner lid, so that the inner lid is guided by the guide rod and lifts by that force, and rises to the lower surface of the outer lid and stops. . For this reason, the pressure gas and the backflow water flow out through the space between the outer peripheral edge of the inner lid and the inner peripheral edge of the inner cover receiving frame, and pass through the fluid hole of the outer cover and exit to the outside air.
[0006]
[Problems to be solved by the invention]
However, the following problems occurred. That is, these fluids change the direction by 90 degrees from the lower side of the inner lid and flow radially, collide with the corners surrounded by the inner peripheral surface of the outer frame and the lower peripheral edge of the outer lid, and from there, The direction changes by approximately 180 degrees and flows in a centripetal manner, and again changes by approximately 90 degrees and flows out of the manhole from the fluid hole of the outer lid.
[0007]
Therefore, it has been found that the outflow of fluid having an abnormal pressure takes more time than expected due to a large fluid resistance to such outflow. In addition, since the inner lid is moved up and down by the guide hole and the guide rod, there is a problem that the vertical movement cannot be smoothly performed over a long period of time after the manhole is laid. Moreover, deposits were easy to collect on the inner lid.
[0008]
The present invention solves the above-mentioned problems, prevents the odor in the manhole from spreading to the outside air, facilitates the fall of deposits, and allows the pressure gas to escape immediately from the lid during abnormal pressure increase in the manhole. An object is to provide an apparatus.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the configuration of the invention is as follows. That is, in the first configuration, an outer lid having a fluid hole penetrating vertically is made openable and closable via a hinge fitting on the outer receiving frame, and the inner lid receiving frame is detachably mounted on the inner lower portion of the outer receiving frame. A lid of an underground facility, wherein an inner lid having a valve port on the upper side of the inner lid receiving frame is detachably mounted, and an automatic valve is provided on the lower surface of the inner lid facing the valve port of the inner lid In the device, a steeply inclined central mountain portion is provided at a central portion of the inner lid, and a valve port of the inner lid extends from an outer periphery of the inner lid to the vicinity of the central mountain portion of the inner lid, and A plurality of valves are provided at almost equal intervals over the vicinity of adjacent valve ports in the inner circumferential direction, and the valve lid of the automatic valve is slightly smaller than the valve ports so as to pass up and down the valve ports. And is supported rotatably at the center side of the inner lid, and a weight is attached to the rotatable side of the valve lid via an arm. Always is configured such that the valve cover is closed, to regulate the opening angle of the above said valve cover, a stopper is provided near the central peak portion of the inner lid,
The outer lid is attached to the center of the engaging shelf protruding from the inner side of the outer receiving frame via a hinge metal fitting, and a fixing part is detachably attached to the engaging shelf, and a fulcrum pin and a length are attached to the fixing part. A handle and fall prevention tool is attached through the hole so that it can be raised and lowered, and a portion located directly below the engagement shelf of the inner lid receiving frame is a portion extending from the upper surface of the outer circumferential surface to the middle of the lower part. That is, a circular arc cutout is formed by cutting out at a portion .
[0010]
In the second configuration, an outer lid having a fluid hole penetrating vertically is opened and closed to the outer receiving frame via a hinge fitting, and the inner lid receiving frame is detachably mounted on the inner lower portion of the outer receiving frame, In a lid device for an underground facility, an inner lid having a valve port on an upper side of the inner lid receiving frame is detachably mounted, and an automatic valve is provided on a lower surface of the inner lid facing the valve port of the inner lid. The central portion of the inner lid is provided with a central mountain portion in a range of about 15 to about 70 degrees with respect to a horizontal plane, and the valve opening of the inner lid is formed from the outer periphery of the inner lid or the vicinity thereof. A plurality of the valve lids of the automatic valve can be passed up and down so that the valve lid of the automatic valve can pass up and down. It is slightly smaller than the valve opening and is rotatably supported at the center side of the inner lid, and an arm is provided on the rotatable side of the valve lid. Thus, the weight is attached and the valve lid is normally closed, and a stopper is provided near the central mountain portion of the inner lid so as to regulate the upward opening angle of the valve lid. And
The outer lid is attached to the center of the engaging shelf protruding from the inner side of the outer receiving frame via a hinge metal fitting, and a fixing part is detachably attached to the engaging shelf, and a fulcrum pin and a length are attached to the fixing part. A handle and fall prevention tool is attached through the hole so that it can be raised and lowered, and a portion located directly below the engagement shelf of the inner lid receiving frame is a portion extending from the upper surface of the outer circumferential surface to the middle of the lower part. That is, a circular arc cutout is formed by cutting out at a portion .
[0011]
In the third configuration, in addition to the first or second configuration, the inner lid receiving frame has a cylindrical portion and an inner flange portion, and the circumferential direction of either the inner flange portion of the inner lid receiving frame or the inner lid A plurality of engaging concave members provided at intervals, a plurality of engaging convex members provided on either side so as to fit and fit into the engaging concave members, and a central mountain portion of the inner lid And a rotating handle provided on the upper surface of the head.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on an embodiment shown in the drawings. 1 and 2, the outer frame 1 has an annular outer shape, and has a tapered surface portion 1a for receiving a lid on the inner side of the upper portion, and an engagement shelf 1b protruding inward is provided at one continuous position. And has a through hole of the hinge fitting 3 at the center thereof. The lower end has an outer flange 1c and an inner flange 1d. The outer lid 2 has a circular shape, and is provided with fluid holes 2a composed of a number of long holes penetrating vertically. The known hinge fitting 3 has a rectangular bar shape, the upper end of which is pin-coupled to the outer lid 1, and the middle passes through the hole of the engagement shelf 1 b, and has a retaining portion at the lower end.
[0014]
Now, the inner lid receiving frame 4 is placed on the inner flange portion 1 d of the outer receiving frame 1. That is,
3 and 4, the inner lid receiving frame 4 has an annular shape, and includes a short cylindrical portion 4 a and an inner flange portion 4 b in order from the top to the bottom. The short cylindrical portion 4a is widened upward, and three tongue pieces 4c are provided radially outward from the upper end of the short cylindrical portion 4a at equal intervals in the circumferential direction. An engagement recess member 4d is provided so that the engagement protrusion member 5c is fitted when the inner lid 5 is rotated clockwise. And the stop hole 4e is penetrated and provided in the inner flange part 4b just before one opening of this engagement recessed part material 4d. And the stop pin 8 is inserted in this, and the detachment | leave from the engagement recessed member 4d by the counterclockwise rotation of the engagement convex member 5c is prevented. There is a stopper 8a in the middle of the vertically long stopper pin 8 in the vertical direction, and a knob 8b is provided on the upper side.
[0015]
Next, as shown in FIGS. 5 and 6, the inner lid 5 has a disk shape and has four rectangular cross-sectional valve ports 5a at equal intervals extending to the vicinity of the valve ports adjacent in the circumferential direction. These valve openings are located between the inner periphery of the inner lid and the central portion of the inner lid. And the bracket 5b is provided in the lower surface of the center side of the inner cover of a valve port. Also, the three engaging convex members 5c are circumferentially equidistant at the outer peripheral edge,
Further, when the inner lid 5 is rotated clockwise in a state where the inner lid 5 is provided on the inner flange portion 4d of the inner lid receiving frame 4 so as to protrude outward in the radial direction, the engaging convex member 5c is provided. Fits and fits into the engaging recess member 4d. The upper surface of the inner lid 5 has a highest circular plane portion 5d, a tapered annular surface portion 5e (a central mountain portion 51 is formed by these surface portions 5d and 5e), and a lowest annular plane portion in order from the center in the radial direction outward. 5f. The valve port 5a is the lowest annular flat surface portion 5f and is open from the vicinity of the outer periphery to the vicinity of the tapered annular surface portion 5e.
[0016]
An automatic valve 6 is provided facing the valve opening 5a of the inner lid 5. That is, a weight 6c hanging downward via an arm 6b is provided on one side of a rectangular plate-shaped valve lid 6a that is large enough to cover the valve port 5a, and a rotating shaft 6d is provided at the boundary between them. Yes. The rotating shaft 6d is supported by the bracket 5b. The valve lid 6a is slightly smaller than the valve port so that the valve port 5a can pass up and down, and is configured such that the valve port 5a is normally closed by balance with the weight 6c.
[0017]
A stopper 7 is provided adjacent to the tapered annular surface portion 5e at the lowest annular plane portion 5f of the inner lid so as to regulate the upward opening angle of the valve lid 6a. A rotation handle 5d is provided on the upper surface of the highest circular flat surface portion 5d located in the central portion of the inner lid.
[0018]
A fixed portion 10a is detachably attached to the engaging shelf 1b, and a ladder-like movable portion 10b is attached to the fixed portion via a fulcrum pin and a long hole so that it can be raised and lowered. Is done. A portion of the inner lid receiving frame 4 located immediately below the engaging shelf 1b is a portion extending from the upper surface of the outer circumferential surface to the middle of the lower portion, and is cut out at an arc portion to be provided with an arc notch 4f. It is.
[0019]
Next, the operation state will be described. In normal times such as sunny weather, the valve lid 6a of the automatic valve 6 blocks the valve port 5a, so that the odor in the manhole is blocked by the inner lid 5 and does not escape upward, thus providing a deodorizing effect. . Next, in the case of rain, when rainwater or rainwater and earth and sand enter the manhole through the outer lid fluid hole 2a, if it falls directly on the valve lid 6a of the automatic valve, the valve lid 6a is moved by its own weight. Push down to open the valve port 5a and drop downward. Moreover, rainwater, earth and sand, etc. collected near the center of the inner lid 5 flow and fall to the valve port 5a along the inclination of the tapered surface portion 5e. Here, when the valve lid 6a is greatly opened downward,
The arm 6b and the weight 6c rotate to the inside of the tapered annular surface portion 5e of the inner lid 5.
[0020]
Next, when the pressure in the manhole rises to a medium or small level, the fluid pushes the valve lid 6a from below to open the valve port 5a, exits from the inner lid 5 and passes through the fluid hole 2a in the outer lid 2, It flows out to the open air. Next, when an abnormal rapid lifting pressure is generated in the manhole, the pressure is applied over almost the entire area of the inner lid 5, so that the force causes the valve lid 6a to instantaneously pivot upward about the pivot shaft 6d. The valve opening 5a is opened and stopped by hitting the stopper 7 (upright state at approximately 90 degrees). For this reason, the pressure gas immediately flows upward through a wide space corresponding to the total area of the valve port 5a, passes through the fluid hole 2a of the outer lid 2, and exits to the outside air.
[0021]
Here, the attachment of the inner lid 5 to the inner lid receiving frame 4 is performed as follows. While holding the handle 5g by hand and suspending the inner lid 5 in a substantially horizontal state, the engaging convex member 5c is placed on the inner flange portion 4b, and the lowest annular plane portion 5f is fitted in the hole inside the inner flange portion 4b. Turn to the right. Then, the engaging convex member 5c fits into the engaging concave member 4d, does not turn further to the right, and
Does not move up and down. Thereafter, when the stop pin 8 is inserted into the stop hole 4e, the engagement convex member 5c does not turn to the left. When removing the inner lid 5, the above procedure is reversed. Thus, the inner lid 5 can be attached and detached very quickly and easily.
[0022]
In order to attach the inner lid receiving frame 4 to the outer receiving frame 1 after the outer receiving frame 1 is laid on the ground and the outer lid 2 is attached to the outer receiving frame 1 with the hinge bracket 3, the following is performed. . The outer lid 2 is opened upward, and the inner lid receiver 4 is held in a substantially vertical state with the circular arc cutout 4f on the lower side, and passes through the diameter portion of the outer receiving frame 1 as it is and enters the lower part, and almost half is inserted. When this occurs, the inner lid receiver 4 is returned to a substantially horizontal state. At this time, since there is the circular arc notch 4f, the engagement shelf 1b and the hinge fitting 3 are not obstructed. Then, the tongue piece 4c is placed on the inner flange 1d and fixed to the inner flange 1d with a bolt 9.
[0023]
Here, the central mountain portion 51 of the inner lid 5 is composed of the highest circular plane portion 5d and the tapered annular surface portion 5e in the embodiment, and the inclination angle of the tapered annular surface portion 5e with respect to the horizontal plane is 40 degrees (the conventional one is It was about 5 degrees). However, the central mountain portion 51 may have a triangular mountain shape (conical shape) without the highest circular plane portion 5d, a hemispherical shell shape, a semi-elliptical shell shape, or the like. In addition, the inclination angle of the central mountain portion 51 with respect to the horizontal plane is suitably a steep inclination in the range of about 15 degrees to about 70 degrees so that sediment such as earth and sand can be easily slipped, and further, from 30 degrees. 50 degrees is preferable. Further, as shown in FIG. 8, the valve opening 5 a of the inner lid 5 is also included in the invention in which the outer periphery of the inner lid 5 is cut out and opened to the vicinity of the central mountain portion 51. In this case, one side of the valve lid 6a presents an arc that closes the valve opening 5a.
[0024]
The present invention is not limited to the embodiments and embodiments described above, and includes various modifications without departing from the scope of the claims for utility model registration.
[0025]
【The invention's effect】
According to the configuration of the present invention, since the automatic valve normally blocks the valve opening of the inner lid, the odor in the manhole is not dissipated to the outside air. In addition, in response to a rapid pressure increase phenomenon in the manhole, a large amount of gas can be released to the atmosphere from the hole of the outer lid by raising the valve lid upward, and the scattering of the lid can be prevented.
[Brief description of the drawings]
FIG. 1 is a plan view of an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
3 is a reduced plan view of an inner lid receiving frame. FIG. 4 is a cross-sectional view taken along line BB in FIG.
FIG. 5 is a reduced plan view of the inner lid.
6 is a cross-sectional view taken along the line CC of FIG.
FIG. 7 is a plan view of the outer frame with the handle / falling prevention device lying down.
FIG. 8 is a plan view of another embodiment of the inner lid.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer receiving frame 1b Engagement shelf 1c Outer flange 1d Inner flange 2 Outer lid 2a Fluid hole 3 Hinge metal fitting 4 Inner lid receiving frame 4a Short cylindrical part 4b Inner flange part 4c Tongue piece 4d Engaging recess material 4e Stop hole 4f Arc notch 5 Inner lid 5a Valve port 5b Bracket 5c Engaging convex member 5d Maximum circular plane part 5e Taper annular plane part 5f Minimum annular plane part 5g Handle 6 Automatic valve 6a Valve lid 6b Arm 6c Weight 6d Rotating shaft 7 Stopper 8 Stopping pin 9 Bolt 10 Handle and fall prevention tool 10a Fixed part 10b Movable part

Claims (3)

An outer lid having a fluid hole penetrating vertically is opened and closed on the outer receiving frame via a hinge metal fitting, and an inner lid receiving frame is detachably mounted on the inner lower portion of the outer receiving frame. In the lid apparatus of the underground facility, an inner lid having a valve port on the upper side of the inner lid is detachably mounted, and an automatic valve is provided on the lower surface of the inner lid facing the valve port of the inner lid.
The central part of the inner lid is provided with a steep central mountain part,
The valve ports of the inner lid extend from the outer periphery of the inner lid to the vicinity of the central mountain portion of the inner lid, and to the vicinity of the valve ports adjacent in the inner circumferential direction. Provided,
The valve lid of the automatic valve is slightly smaller than the valve port so that it can pass up and down through the valve port, and is pivotally supported on the center side of the inner lid. A weight is attached via an arm, and the valve lid is normally closed,
A stopper is provided near the central mountain portion of the inner lid so as to regulate the opening angle of the valve lid upward.
The outer lid is attached to the center of the engaging shelf protruding from the inner side of the outer receiving frame via a hinge metal fitting, and a fixing part is detachably attached to the engaging shelf, and a fulcrum pin and a length are attached to the fixing part. A handle and fall prevention tool is attached through the hole so that it can be raised and lowered, and a portion located directly below the engagement shelf of the inner lid receiving frame is a portion extending from the upper surface of the outer circumferential surface to the middle of the lower part. A lid device for an underground facility, characterized in that a circular arc notch is formed by being cut out at a portion . An outer lid having a fluid hole penetrating vertically is opened and closed on the outer receiving frame via a hinge metal fitting, and an inner lid receiving frame is detachably mounted on the inner lower portion of the outer receiving frame. In the lid apparatus of the underground facility, an inner lid having a valve port on the upper side of the inner lid is detachably mounted, and an automatic valve is provided on the lower surface of the inner lid facing the valve port of the inner lid.
The central part of the inner lid is provided with a central mountain part in the range of about 15 to about 70 degrees with respect to the horizontal plane,
The valve ports of the inner lid extend from the outer periphery of the inner lid to the vicinity of the central mountain portion of the inner lid, and to the vicinity of the valve ports adjacent in the inner circumferential direction. Provided,
The valve lid of the automatic valve is slightly smaller than the valve port so that it can pass up and down through the valve port, and is pivotally supported on the center side of the inner lid, and on the pivotable side of the valve lid A weight is attached via an arm, and the valve lid is normally closed,
A stopper is provided near the central mountain portion of the inner lid so as to regulate the opening angle of the valve lid upward.
The outer lid is attached to the center of the engaging shelf protruding from the inner side of the outer receiving frame via a hinge metal fitting, and a fixing part is detachably attached to the engaging shelf, and a fulcrum pin and a length are attached to the fixing part. A handle and fall prevention tool is attached through the hole so that it can be raised and lowered, and a portion located directly below the engagement shelf of the inner lid receiving frame is a portion extending from the upper surface of the outer circumferential surface to the middle of the lower part. A lid device for an underground facility, characterized in that a circular arc notch is formed by being cut out at a portion .   The inner lid receiving frame has a cylindrical portion and an inner flange portion, and a plurality of engaging recesses provided at intervals in the circumferential direction of either the inner flange portion of the inner lid receiving frame or the inner lid. A member, a plurality of engaging convex members provided on either side so as to fit and fit into the engaging concave member, and a rotation handle provided on the upper surface of the central mountain portion of the inner lid. The underground facility lid apparatus according to claim 1 or 2, characterized in that

Images