JP4729082B2 - Public fence backflow prevention device and public fence - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a public-basin backflow prevention device that can prevent drainage flowing back from a public basin from being discharged from a drainage facility, and a public basin to which the backflow-prevention device can be attached.

  In general, wastewater discharged from each drainage facility in the household flows into a residential land installed in the residential land through a drain branch pipe connected to the drainage facility, and is discharged directly from this residential land or through another residential land. It is merged into one public dredging and finally discharged from this public dredging to the sewer main.

  In recent years, the amount of wastewater flowing into this sewer main has increased, and in particular when a large amount of rainwater flows into the sewer main due to typhoons, the drainage capacity of the sewer main has been exceeded, and overflowed wastewater or air pumped by this wastewater has become public. There is a problem that the drainage branch pipes flow backward through the dredging, and drainage or air blows out from the drainage facilities into the building.

  Therefore, conventionally, a hook-shaped engagement portion is provided on the inner wall surface near the inner opening end of the inflow side connection port for connecting the inflow side connection pipe of the drainage drainage main body, and the inflow side connection port is provided in this engagement portion. A structure is known in which an inner end portion is rotatably attached to a valve element that is opened by drainage flowing into the drainage basin from the inflow side connection port (see, for example, Patent Document 1).

This conventional backflow prevention device has a problem in that it is difficult to form integrally a hook-like engagement portion that supports the valve body so as to be openable and closable in a drainage tub that is injection-molded with synthetic resin.
JP-A-10-195969 (second page, third page, FIG. 4, FIG. 7)

  The problem to be solved is that the backflow prevention device for preventing the drainage flowing back from the public dredger from being discharged from the drainage facility cannot be easily attached to the public dredger.

  The present invention has been made in view of such points, and a backflow prevention device for public dredging that can easily attach a backflow prevention device for preventing drainage flowing back from a public dredge from being discharged from a drainage facility. And a public fence to which the backflow prevention device can be attached.

  The backflow prevention device for public dredging according to the present invention includes an inflow side connection port, an outflow side connection port, an invert portion that connects the inflow side connection port and the outflow side connection port, and a cleaning port that opens above the invert portion. A public-basket backflow prevention device that is attached to the formed public fence main body, and is a substantially cylindrical backflow-prevention device body that is formed integrally with the public fence main body on the inner end side of the inflow side connection port of the public fence main body. And a valve body that is attached to the backflow prevention device main body and is opened toward the inside of the public dredger main body by drainage flowing from the inflow side connecting pipe, and a mounting portion is formed on the backflow prevention device main body. A shaft support member in which the valve body is rotatably attached to the attachment portion can be retrofitted.

  Then, attach the shaft support member with the valve body attached to the attached part of the backflow prevention device body that is integrally formed from the cleaning port of the public fence body to the inner end side of the inflow side connection port of the public fence body. Accordingly, the valve body is configured to be opened toward the inside of the public fence body by drainage flowing into the backflow prevention apparatus body from the inflow side connection pipe, and the valve body of the backflow prevention apparatus is attached to the inflow side connection port of the public fence body. The work can be facilitated, and the backflow prevention device main body is formed integrally with the inflow side connection port of the public fence main body, so the backflow prevention device body does not come off from the inflow side connection port of the public dredge body, The backflow prevention device main body does not flow out from the outflow side connection port of the public dredger main body to the sewer main.

  Further, the backflow prevention device for public dredging according to the second aspect of the invention is the backflow prevention device for public dredging according to claim 1, wherein the substantially cylindrical backflow prevention device main body is connected to the inflow side connection port of the public dredging main body. It is formed of a substantially cylindrical material that is fitted and fixed from the inside of the bag main body.

  And by fitting and fixing the substantially cylindrical backflow prevention device main body to the inflow side connection port of the public fence main body from the inside of the public fence main body, the backflow prevention device body can be easily attached to the inflow side connection port of the public fence main body. It can be formed integrally, and the mold for the public fence body can be made inexpensive.

  According to a third aspect of the present invention, there is provided a public urn comprising an inflow side connection port, an outflow side connection port, an invert portion that connects the inflow side connection port and the outflow side connection port, and a cleaning port that opens above the invert portion. The formed public fence body, the substantially cylindrical backflow prevention apparatus body formed integrally with the public fence body so as to face the inner opening end of the inflow side connection port of the public fence body, and the backflow prevention apparatus body And a valve body that opens toward the inside of the public fence main body by drainage flowing in from an inflow side connection pipe connected to the inflow side connection port of the public fence main body. A shaft support member formed and attached to the attached portion so as to be able to turn the valve body can be retrofitted.

  Then, attach the pivotal support member with the valve body attached to the attached part of the backflow prevention device main body integrally formed from the cleaning port of the public fence main body to the inner opening of the inflow side connection port of the public fence main body. By attaching the valve body that opens toward the inside of the public fence body by the drainage flowing from the inflow side connection pipe to the backflow prevention apparatus body, attach the valve body of the backflow prevention apparatus to the inflow side connection port of the public fence body The work can be facilitated, and the backflow prevention device main body is formed integrally with the inflow side connection port of the public fence main body, so the backflow prevention device body does not come off from the inflow side connection port of the public dredge body, The backflow prevention device main body does not flow out from the outflow side connection port of the public dredger main body to the sewer main side.

  The backflow prevention device for public dredging of the present invention is such that even if drainage overflowing from the sewer main flows back to the public dredging main body from the outflow side connection port, the drainage flowing back by the valve provided in the backflow prevention device main body Since it does not enter the connection port, the drainage and the air pumped by the drainage are not ejected from the drainage system in the house. In addition, by attaching a shaft support member with a valve body attached to the part of the backflow prevention device body from the cleaning port of the public fence body, the valve body can be easily attached to the backflow prevention device body. The prevention device main body does not come off from the inflow side connection port of the public dredger main body, and the backflow prevention device main body does not flow out from the outflow side connection port of the public dredger main body to the sewer main side.

  According to a second aspect of the present invention, there is provided an apparatus for preventing a reverse flow for a public fence, which can be formed integrally with the main body of the public fence easily from the inside of the main body of the public fence. Can be.

  The public urn according to claim 3 can easily attach the valve body to the backflow prevention device main body by attaching the shaft support member to which the valve body is attached, and the backflow prevention device main body is the inflow side of the public fountain main body. Since it is formed integrally with the connection port, the backflow prevention device main body is not detached from the inflow side connection port of the public dredger body, and does not flow out from the outflow side connection port of the public dredger body to the sewer main side.

  BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment of a public fence backflow prevention device and public fence according to the present invention will be described with reference to FIGS.

  The public fence body 1 is formed of synthetic resin, and has an inflow side connection port 2, an outflow side connection port 3, an invert portion 4 that connects the inflow side connection port 2 and the outflow side connection port 3, and the invert portion 4. And a cleaning port 5 opened upward. The cleaning port 5 is formed as a receiving port, and a lower end portion of the rising pipe 6 is fitted into the cleaning port 5 of the receiving port, and a frame body 7 is fitted to the upper end portion of the rising tube 6.

  The frame body 7 has a substantially cylindrical fitting insertion portion 8 having an outer diameter substantially the same as the inner diameter of the riser tube 6, and an annular portion on the inner peripheral portion of the upper end opening of the frame body 7. A support portion 10 is formed, and a substantially disc-shaped cleaning port lid body 11 is supported on the support portion 10 so as to be freely opened and closed.

  The inflow side connection port 2 of the public dredger body 1 is formed to have an inner diameter substantially the same as the outer diameter of the upstream inflow side connection pipe 12 communicating with the drainage facility.

  The backflow prevention device main body 15 formed integrally with the public fence main body 1 has a substantially cylindrical shape having an inner diameter substantially equal to the inner diameter of the inflow side connection pipe 12 connected to the inflow side connection port 2 of the public fence main body 1. The substantially cylindrical backflow prevention device main body 15 has an outer diameter on one end side that is fitted and connected to the inflow side connection port 2 and is substantially the same as the inner diameter of the inflow side connection port 2. A stopper protrusion 45 that projects into the inner edge opening curved edge 52 of the inflow side connection port 2 of the public fence main body 1 protrudes from an upper portion of the intermediate portion.

  In addition, an upper portion of the backflow prevention device main body 15 is provided with an attached portion 46 formed in a shaft shape that is located on the other end side of the stopper projection 45 and protrudes upward. A screw part 48 for screwing the nut 47 is formed at the upper part of the attached part 46.

  Further, the opening end surface on the other end side of the backflow prevention device main body 15 is formed as an end surface inclined in the spreading direction from the upper end portion toward the lower side.

  Further, a shaft support member 49 is provided on the upper end of the valve body 16 that opens at the other end side end of the backflow prevention device main body 15 so as to be openable and closable toward the inside of the public fence main body 1 by drainage flowing from the inflow side connecting pipe 12. It is attached to a shaft 50 so as to be rotatable by a shaft 50. The shaft support member 49 is formed with a fitting cylinder portion 51 that is fitted from the upper side to the lower side of the attached portion 46 of the backflow prevention device main body 15.

  In addition, the backflow prevention device main body 15 has a stopper protrusion 45 on the inner end side of the inflow side connection port 2 of the public fence main body 1 from one end side, and an inner end opening curved edge 52 of the inflow side connection port 2 of the public fence main body 1. Until it is engaged with each other and is fixed with an adhesive, and is integrally formed on the inner end side of the inflow side connection port 2 of the main body.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 2, the backflow prevention device main body 15 is fitted from one end side from the inner end of the inflow side connection port 2 of the public fence main body 1 formed of synthetic resin, and as shown in FIG. The protrusion 45 is fixed to the inner end opening curved edge 52 of the inflow side connection port 2 of the public fence main body 1 with an adhesive. In this state, the public fence body 1 is shipped.

  Then, the cleaning port lid body 11 installed on the ground surface is removed from the frame body 7 and attached to the shaft support member 49 from the rising pipe 6 connected to the cleaning port 5 of the existing public fence main body 1 so as to be rotatable on the shaft 50. The valve body 16 is stored in the public fence body 1.

  Next, as shown in FIGS. 4 and 5, the fitting cylinder portion 51 of the shaft support member 49 is fitted into the attached portion 46 of the backflow prevention device main body 15 from above, and as shown in FIGS. The nut 47 is screwed into the upper threaded portion 48 of the mounted portion 46 and the shaft support member 49 is fixed, so that the wastewater flowing into the backflow prevention device main body 15 from the inflow side connecting pipe 12 can be contained in the public fence main body 1. A valve body 16 opened toward the rear is attached later. Since the fitting cylinder portion 51 of the shaft support member 49 is fitted to the attached portion 46 of the backflow prevention device main body 15 from above and fixed with the nut 47, the operability is good.

  In this way, the valve 46 is connected to the attached portion 46 of the backflow prevention device main body 15 formed integrally from the cleaning port 5 of the existing public dredging main body 1 to the inner end side of the inflow side connection port 2 of the public dredging main body 1. By attaching the shaft support member 49 to which the body 16 is attached, the valve body 16 opened toward the inside of the public fence body 1 by the drainage flowing into the backflow prevention device body 15 from the inflow side connecting pipe 12 can be attached. Therefore, it is possible to retrofit the pivot support member 49 in which the valve body 16 is rotatably attached to the attached portion 46, and the work of attaching the valve body 16 of the backflow prevention device to the inflow side connection port 2 of the public fence body 1 is easy. it can.

  In addition, since the backflow prevention device main body 15 is formed integrally with the inflow side connection port 2 of the public fence main body 1, the backflow prevention device main body 15 is not detached from the inflow side connection port 2 of the public dredge main body 1. The backflow prevention device main body 15 does not flow out from the outflow side connection port 3 of the public dredger main body 1 to the sewer main side. Then, by fitting and fixing the substantially cylindrical backflow prevention device main body 15 to the inflow side connection port 2 of the public fence body 1 from the inside of the public fence body 1, the inflow side connection port 2 of the public fence body 1 can be easily provided. In addition, the backflow prevention device main body 15 can be integrally formed, and the mold of the public fence main body 1 can be made inexpensive.

  And the backflow prevention apparatus main body 15 attached to the inflow side connection port 2 of the public dredging main body 1 was provided in the backflow prevention apparatus main body 15 even if the waste water overflowed from the sewer main flowed back to the public dredging main body 1. Since the waste water flowing backward by the valve body 16 does not enter the inflow side connection port 2, the waste water and the air pumped by the waste water are not ejected from the drainage equipment in the house.

  Moreover, since the valve body 16 provided in the backflow prevention apparatus main body 15 attached to the inflow side connection port 2 is opened toward the inside of the public fence body 1, the drainage discharged from each drainage facility is opened to the public fence body. It flows into 1 and is discharged from the outflow side connection port 3 to the sewer main.

  It is also possible to ship with the valve body 16 attached to the backflow prevention device main body 15 formed in the public fence main body 1 via the shaft support member 49.

  In this embodiment, the substantially cylindrical backflow prevention device main body 15 is formed by fitting and fixing to the inflow side connection port 2 of the public fence main body 1 from the inside of the public fence main body 1. The backflow prevention device main body 15 can be formed integrally with the public fence main body 1.

  Moreover, in the said embodiment, although it was set as the structure which formed the inflow side connection port 2 and the one outflow side connection port 3 in the public fence main body 1 facing each other, it is not restricted to this structure. In the public fence main body 1 in which the inflow side connection port 2 and one outflow side connection port 3 are formed, the backflow prevention device main body 15 is attached to each inflow side connection port 2.

It is a vertical side view of the public fence which attaches the backflow prevention apparatus which shows one embodiment of this invention. It is a vertical side view which shows the state which attaches a backflow prevention apparatus main body same as the above to a public fence main body. It is a vertical side view which shows the state which attached the backflow prevention apparatus main body same as the above to the public fence main body. It is a vertical side view which shows the state which attaches a valve body to a backflow prevention apparatus main body same as the above. It is a vertical side view which shows the process of attaching a valve body to a backflow prevention apparatus main body same as the above. It is a vertical side view which shows the state which attached the valve body to the backflow prevention apparatus main body same as the above. It is a top view which shows the state which attached the valve body to the backflow prevention apparatus main body same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Public dredging body 2 Inflow side connection port 3 Outflow side connection port 4 Invert part 5 Cleaning port
12 Inlet connection pipe
15 Backflow prevention device
16 Disc
46 Mounted part
49 Shaft support member

Claims (3)

Backflow for public dredging attached to the main body of a public dredging which has formed an inflow side connection port, an outflow side connection port, an invert portion connecting the inflow side connection port and the outflow side connection port, and a cleaning port opened above the invert portion Prevention device,
A substantially cylindrical backflow prevention device main body integrally formed with the main body on the inner end side of the inflow side connection port of the main body,
A valve body that is attached to the main body of the backflow prevention device and is opened toward the inside of the main body by the waste water flowing in from the inflow side connecting pipe,
Forming a mounting portion on the backflow prevention device body,
A backflow prevention device for public fences, characterized in that a pivotal support member that is rotatably attached to the valve body can be attached to the attached portion.   The substantially cylindrical backflow prevention device main body is formed of a substantially cylindrical material fitted and fixed to the inflow side connection port of the public fence main body from the inside of the public fence main body. Backflow prevention device. An inflow side connection port, an outflow side connection port, an invert portion that connects the inflow side connection port and the outflow side connection port, and a public fence main body that forms a cleaning port that opens above the invert portion;
A substantially cylindrical backflow prevention device body formed integrally with the public fence body facing the inner opening end of the inflow side connection port of the public fence body;
A valve body that is attached to the backflow prevention device main body and is opened toward the inside of the public fence main body by drainage flowing from the inflow side connection pipe connected to the inflow side connection port of the public fence main body,
Forming a mounting portion on the backflow prevention device body,
A public eaves characterized in that it is possible to retrofit a pivot support member in which the valve body is rotatably attached to the attached portion.

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