JPH0452280Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pipe connection structure used to connect a pipe such as a sewer pipe to a manhole body.

[Prior Art] Conventionally, this type of pipe connection structure involves inserting a pipe line wrapped with rubber packing into a hole provided in the manhole body, and connecting this hole with the outer end of the pipe line. It is known that the gaps are filled with mortar.

[Problems to be solved by the invention] However, with such a device, it is necessary to harden the connection part with mortar, and this work has to be done on the narrow outside of the manhole body, which is inconvenient and time-consuming. There is. In addition, once connected, the pipe line is fixed to the manhole body and it is not possible to subtly move the pipe line up, down, left or right, or change the installation angle.
When connecting the other end of the conduit to another conduit, there is an inconvenience that if there is a shift in the connection position, the connection is very difficult. Furthermore, since the pipeline is fixed, vibrations caused by backfilling soil around the manhole body after constructing the manhole body and connecting the pipeline, and partial earth pressure applied to the pipeline, There is a disadvantage that the body is likely to break due to time or subsequent subsidence of the manhole.

[Means for Solving the Problems] The present invention has been made with attention to the above-mentioned circumstances, and is a rubber ring-shaped pipe having a wide flange on the outer periphery near the open end of the conduit connected to the manhole body. With the water stopper fitted in a fluid-tight manner and the open end of the pipe line loosely fitted into the through hole provided in the manhole body, the flange of the annular water stopper is attached to the outer wall of the manhole body. I'm trying to glue it. The present invention is characterized in that a water-stopping filler and packing having elasticity capable of absorbing displacement are interposed between the outer periphery of the opening end of the conduit and the inner periphery of the through hole.

[Function] With this kind of structure, connection can be made simply by gluing the collar to the outer wall, and even after connection, the pipe can be connected by utilizing the elastic deformation of the annular water stopper, water stopper filler, and packing. It can be moved subtly up, down, left and right, and the installation angle can be changed, and the pipe can rotate to a certain extent in response to vibrations during backfilling, partial earth pressure, or subsidence of a manhole, softening the impact and load. be able to.

In other words, fillers have high sealing properties but have difficulty in shape retention, and conversely, packing materials have high elastic restoring force but may be inferior to fillers in tight sealing properties.
In this invention, both the filler and the packing are inserted into the loose fitting gap, so they compensate for each other's shortcomings.
It exhibits high sealing performance and elastic restoring force, effectively preventing water leakage. Moreover, since both the filling material and the packing have elasticity, this combined with the fact that the annular water stopper is made of rubber means that the pipe line cannot be displaced within a certain range relative to the manhole body. It becomes possible. Therefore, as described above, it is possible to easily cope with the impact and uneven settlement during backfilling, and it is possible to eliminate problems such as destruction due to concentrated loads acting on the members. In addition, since the flange of the annular water stopper is formed wide, it can be bonded to the manhole body over a wide range. Therefore, even if the pipe line is connected so as to be elastically displaceable, the annular water stopper can be firmly fixed to the manhole body.

[Embodiment] An embodiment of the present invention will be described above with reference to the drawings.

The manhole body 1 is constructed by sequentially stacking a plurality of concrete blocks, that is, a bottom block 2, a frame block 3, a straight wall block 4, and an inclined wall block 5. In detail,
The bottom block 2 is a disc-shaped one laid on a chestnut stone foundation 6 through a mortar layer 7, and has a positioning protrusion 2a protruding in an annular shape from the outer periphery of its upper surface. . In addition, the body block 3
The lower end 3a is attached to the protrusion 2a of the bottom block 2.
It is a cylindrical body fitted inside the pipe, and through holes 3c are bored in required places on its peripheral wall, and pipes 8, 8 constituting the sewer etc. are connected to these through holes 3c. . An invert 11 having an inverted arch-shaped groove 9 connected to the pipes 8, 8 is installed at the bottom of the rod block 3. Further, the straight wall block 4 is a cylindrical body placed on the body block 3 with its lower end side joint surface 4a abutted against the upper end side joint surface 3b of the body block 3. be. Furthermore, the slanted wall block 5 is placed on the straight wall block 4 with its lower end side joint surface 5a abutted against the upper end side joint surface 4b of the straight wall block 4, and its upper end side is abutted against the upper end side joint surface 4b of the straight wall block 4. It is formed into an eccentric cylindrical body having a substantially truncated conical shape. A receiving frame 13 for holding the lid 12 in an openable and closable manner is placed on the joint surface 5b on the upper end side of the inclined wall block 5 via a concrete adjustment link 14 and a plurality of adjustment rubbers 15. and is fixed using receiving frame bolts 16.

In such a manhole, an annular water stopper 18 made of a rubber material and having a wide flange 17 is fluid-tightly fitted onto the outer periphery of the connection portion 8a of the pipe line 8 connected to the manhole body 1. There is. Then, with the open end 8b of the pipe 8 loosely fitted into the through hole 3c, the flange 17 of the annular water stopper 18 is connected to the outer wall 1a of the manhole body 1 and the outer wall portion of the body block 3. An epoxy adhesive 19 is used to adhere the parts. Further, a portion 18a of the annular water stopper 18 connected to the pipe line 8 is bonded to the outer peripheral wall of the pipe line 8. Note that the opening 8b of the conduit 8
Between the outer periphery of the opening 8b and the wall surface of the frame block 3 surrounding the opening 8b, an elastic water-stopping material such as polyurethane, that is, a water-stopping filler 21, and a water-stopping material made of rubber are provided. A gasket 22 for use is fitted in a liquid-tight manner.

With this configuration, the manhole main body 1 and the pipe line 8 are connected by the annular water stopper 18 made of a rubber-based material, so even after connection, the pipe line 8 can be subtly moved vertically and horizontally. You can change the mounting angle. Therefore, even if there is a positional shift when connecting the other end of the pipe line 8 to another pipe line, the connection can be easily made. Later the manhole body 1
Even if force due to vibrations, one-sided earth pressure, or sinking of a manhole is applied to the pipe line 8 during backfilling with soil around the area, the pipe line 8 will rotate in response to the vibration, one-sided earth pressure, or sinking force. Since it reduces impact and load, it is effective in preventing body breakage. Furthermore, since the flange 17 is bonded to the outer wall 1a of the manhole body 1 over a wide area with epoxy resin 19, leakage of sewage etc. from the gap between the pipe line 8 and the manhole body 1 can be completely prevented. Moreover, the conduit 8 and the manhole body 1 can be safely connected without using special tools. Furthermore, since the connection can be made simply by gluing the flange 17 to the outer wall 1a, the work of connecting the conduit 8 to the manhole body 1 is easy. In addition, since the filler 21 and the packing 22 are inserted into the loose fitting gap between the pipe line 8 and the manhole body 1, it exhibits particularly high sealing performance and elastic restoring force, effectively preventing water leakage. This makes it possible to prevent

It should be noted that the present invention is of course not limited to the above-mentioned embodiments, and the adhesion between the flange and the manhole body is not limited to epoxy-based resin, but epoxy-based resin has a good adhesion effect. expensive.

Further, the annular water stopper is not limited to one that is adhered to the pipe, but may be one that is press-fitted, for example.

In addition, the fitting of the annular water stopper to the pipe is not limited to being done at the work site, but may be one that has been fitted in advance at a factory or the like. Connection work at the work site can be facilitated.

Further, the form of the manhole body is not limited to that of the above embodiment.

Various other modifications can be made without departing from the spirit of the present invention.

[Effects of the invention] As explained above, the present invention allows for slight vertical and horizontal movements and changes in the installation angle even after the pipe is connected to the manhole body, making it easy to connect to other pipes. In addition, it is possible to provide a pipe connection structure in a manhole that can prevent bending due to vibrations during backfilling, partial earth pressure, or subsidence of the manhole, and can also facilitate connection work. be. In particular, the present invention makes the collar of the annular water stopper wide to ensure adhesion, and has elasticity that can absorb displacement of the pipe between the outer periphery of the pipe and the through hole of the manhole body. Since a water-stopping filler and packing material are provided, it is possible to easily cope with the above-mentioned uneven settlement, etc., and to exhibit high water-stopping properties.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a sectional view and FIG. 2 being an enlarged sectional view showing section A in FIG. 1. 1... Manhole body, 1a... Outer wall, 2...
Bottom plate block, 2a... Projection, 3... Body block, 3a... Lower end, 3b... Joint surface, 3c...
Through hole, 4...straight wall block, 4a...joint surface,
4b...Joint surface, 5...Slanted wall block, 5a...
Joint surface, 6... Chestnut stone foundation, 7... Mortar layer,
8... Conduit, 8a... Connection portion, 8b... Opening, 9... Groove, 11... Invert, 12... Lid, 13... Receiving frame, 14... Adjustment link, 15...
... Adjustment rubber, 16 ... Receiving frame bolt, 17 ... Flange, 18 ... Annular water stopper, 18a ... Contact part,
19...Adhesive (epoxy resin), 21...Water stop filler (water stop material), 22...Water stop seal (water stop material).

Claims (1)

[Scope of utility model registration request] A rubber annular water stopper having a wide flange is fluid-tightly fitted to the outer periphery near the open end of the conduit connected to the manhole body, and the open end of the conduit is provided with a through hole in the manhole body. The flange of this annular water stopper is adhered to the outer wall of the manhole main body when it is loosely fitted into the hole, and there is no displacement between the outer periphery of the opening end of the pipe and the inner periphery of the through hole. A pipe connection structure in a manhole, characterized in that a water-stopping filler and packing material having elasticity capable of absorbing water are interposed therein.