JP5065232B2 - 桝 with check valve - Google Patents

Description

  The present invention relates to a dredger equipped with a backflow prevention valve for preventing drainage flowing back from the sewer main side from being discharged from a drainage facility connected to the dredger.

  In general, the wastewater discharged from each drainage facility in the home flows into a fence installed in the residential land through a drainage branch pipe connected to the drainage facility, and directly from this fence or through another fence into one fence. After joining, it is finally discharged from this dredge to the sewer main.

  In recent years, the amount of wastewater flowing into this sewer main has increased, and in particular, if 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 been dredged. As a result, the drainage branch pipe flows backward, and the drainage or air is ejected from the drainage equipment connected to the drainage branch pipe into the building.

  In view of this, the present applicant has proposed a dredging with a backflow prevention valve that can be easily attached to the dredger in order to prevent drainage flowing back from the sewer main side from being discharged from the drainage facility through the dredging ( For example, see Patent Document 1.)

  In addition, an apparatus has been proposed in which a valve body holding frame body attached to a cleaning port of a dredger body is provided with a valve body for preventing backflow arranged in a sewage pipe connected to an outflow side connection port of the dredge body. (For example, refer to Patent Document 2).

  However, the scissors with a backflow prevention valve shown in Patent Document 1 have a large apparatus for attaching the valve body holding frame to the scissors, and there is a problem that this attaching apparatus is bulky and expensive.

Moreover, in the scissors with a backflow prevention valve shown in Patent Document 2, since the valve body is disposed in the sewage pipe connected to the outflow side connection port of the soot body, the state of the valve body is visually observed from the cleaning port of the soot body. If there is a backflow of drainage to the drainage facility, the valve body may be noticed for the first time. Furthermore, in this saddle with a backflow prevention valve, the valve body is installed in the sewage pipe and the valve body is not a single plate in order to drain effectively when a large amount of drainage flows from the upstream side. Since it is composed of multiple parts with movable parts, the number of parts increases, resulting in high cost and high pressure, so there is a problem that the movable part has a high risk of breakage. .
Japanese Patent Laying-Open No. 2006-283547 (first page, FIGS. 1 and 10) Japanese Unexamined Patent Publication No. 2008-101396 (first page, FIGS. 2 to 4)

  The problem to be solved is that it is not possible to easily attach a valve body that prevents the backflow of drainage to prevent the drainage water flowing back from the drainage from being discharged from the drainage facility, and the valve body is damaged. Confirmation was also difficult.

  The present invention has been made in view of the above points, and can reliably prevent drainage flowing backward from the drainage basin from being discharged from the drainage facility, and without requiring a complicated attachment device for the valve body to prevent backflow. It is possible to provide a drainage with a backflow prevention valve that can be attached and effectively drained, and is less likely to damage the backflow prevention valve body, and can be easily replaced when the valve body is damaged.

  The saddle with a backflow prevention valve of the present invention forms an inflow side connection port, an outflow side connection port, an invert portion for connecting the inflow side connection port and the outflow side connection port, and a cleaning port opened above the invert portion. And a valve body holding frame that can be detachably attached to the saddle body and rotatably holds the valve body that closes the inflow side opening that communicates with the invert part of the inflow side connection port. A body with a backflow prevention valve, wherein the body is connected to the inflow side opening of the inflow side opening that communicates with the invert side from the inflow side connection port. A valve seat surface abutting so as to close the part, a support part for supporting the valve body holding frame body in a vertical direction, and a positioning part for positioning the valve body holding frame body in the collar body, The body holding frame body is a valve body holding body that rotatably holds the valve body. And parts, and a mounting portion for mounting said valve body holding frame body removably in the Masumoto body, detachable jig upon detachment of the valve body holding frame body has a jig engagement portion to be engaged.

  Then, remove the cleaning port lid installed on the ground surface, engage the jig with the jig engaging part of the valve body holding frame body, and operate the jig to rise up connected to the cleaning port of the main body The valve body holding frame with the valve body attached from the pipe is housed in the main body, and the mounting portion of the valve body holding frame is supported by the support section of the main body and the valve body holding frame body is used as the positioning section of the main body. By positioning and holding, the valve body holding frame is attached to the inside of the rod body by the attaching portion, and the jig is removed from the valve body holding frame.

  The valve body attached to the valve body holding frame with the valve body holding frame attached to the inside of the rod body is a valve seat formed on the periphery of the opening of the inflow side opening of the inflow side connection port formed on the rod body. Contacting the surface closes the inner opening of the inflow side connection port.

  When the valve body closes the inflow side opening of the inflow side connection port of the main body, the drainage that flows out from the drainage facility flows into the inflow side connection port of the main body from the drainage branch pipe, and the drainage flows to the valve seat. The valve body in contact with the surface is opened and flows out from the invert part to the outflow side connection port.

  In addition, even if wastewater overflowing from the sewer main flows back into the main body from the outflow side connection port of the main body, the drainage does not flow back into the inflow side opening of the inflow side connection port that is blocked by the valve body. Therefore, it does not enter the inflow side connecting pipe, and the drainage and the air pumped by the drainage are not ejected from the drainage equipment in the house.

  In addition, when the valve body is damaged, the jig is engaged with the jig engaging portion of the valve body holding frame body, the valve body holding frame body is pulled up from the rising pipe, the valve body is replaced, Attach the valve body holding frame to the main body.

  The scissors with backflow prevention valve according to claim 2 are the scissors with backflow prevention valves according to claim 1, wherein the attachment portion of the valve body holding frame is abbreviated in plan view with a part of the circumference of the hollow cylindrical shape cut out. It is C-shaped, the height dimension is 10% to 50% of the diameter of the hollow cylinder, and the outer diameter of the hollow cylinder is larger than the inner diameter of the riser pipe connected to the cleaning port of the main body. The attachment portion of the valve body holding frame is pressed against the inner surface of the riser tube by a repulsive force in a state of being reduced in diameter to the inner peripheral surface of the riser tube.

  Then, the valve body holding frame is attached to the inner surface of the riser pipe with the repulsive force in a state where the attachment portion is elastically reduced in diameter to the inner peripheral surface of the riser pipe. The valve body holding frame body can be pushed down by a jig in a pressed state, but the height of the mounting portion of the valve body holding frame body is 10% or more of the diameter of the hollow cylinder forming the mounting portion. As a result, the valve body holding frame is pushed down as it is without being rotated. In addition, the height of the attachment part of the valve body holding frame is set to 50% or less of the diameter of the hollow cylinder forming the attachment part, so that the gap between the rising pipe and the attachment part of the valve body holding frame is between Excessive friction does not occur, and the valve body holding frame can be smoothly pushed down to a predetermined position.

  The scissors with backflow prevention valve according to claim 3 are the scissors with backflow prevention valves according to claim 1 or 2, wherein the positioning portion of the scissors body is formed by a protrusion protruding into the scissors body, The lower part to which the valve body holding frame is engaged and held is horizontal, the upper part that is guided when the valve body holding frame is attached is inclined downward, and at least one of both side parts is in a direction in which the tip side becomes narrower. It is slanted.

  The valve body holding frame body is engaged and held at the lower part of the positioning part of the heel body that positions and holds the valve body holding frame body. When the valve body holding frame body is positioned and held by the heel body, the upper part of the positioning part Is guided while being elastically deformed along the inclination of the positioning portion, and is positioned and supported by the lower portion of the positioning portion.At least one of the both side portions of the positioning portion is inclined in a direction in which the tip end side is narrowed. When removing the valve body holding frame body, if a force is applied to the valve body holding frame body in the turning direction with a jig so as to twist the valve body holding frame body in the horizontal direction, the valve body holding frame body is projected. The valve body holding frame body is elastically deformed and is removed from the protrusions, and the valve body holding frame body can be pulled upward by a jig.

  According to the saddle with a backflow prevention valve of the present invention, the valve body is positioned and attached to the inside of the valve body holding frame body, and the valve body is related to the inner diameter of the drain pipe connected to the inflow side connection port or the outflow side connection port. The drainage flows from the inflow side connection port through the invert part to the outflow side connection port for effective drainage, and the state of the valve body can be visually observed from the cleaning port. Failures such as broken valve bodies can be easily and reliably confirmed.

  In addition, the valve body holding frame with the valve body attached can be attached to the correct position by the positioning part, so that the valve body does not shift from the valve seat surface, and the valve body abuts on the valve seat surface and enters the inflow side. The inner opening of the connection port is securely closed, and the valve body holding frame is reliably supported by the support portion of the rod main body and does not fall off, so that backflow can be reliably prevented.

  According to the scissors with the backflow prevention valve according to claim 2, the valve body holding frame body to which the valve body is attached is pressed by a repulsive force in a state where the attachment portion is reduced in diameter to the inner peripheral surface of the rising pipe. The valve body holding frame body can be pushed down by a jig, but the height of the mounting portion of the valve body holding frame body is 10% or more of the diameter of the hollow cylinder forming the mounting portion. As a result, the valve body holding frame body is mounted without being rotated, and the height dimension of the mounting portion of the valve body holding frame body is 50% or less of the diameter of the hollow cylinder forming the mounting portion. Accordingly, the valve body holding frame can be smoothly pushed down to the predetermined position and attached to the predetermined position without excessive friction between the riser tube and the attachment portion of the valve body holding frame.

  According to the scissors with the backflow prevention valve according to claim 3, the valve body holding frame body is engaged and held at the lower part of the positioning portion of the scissors body, and when the valve body holding frame body is positioned and held on the scissors body, the protrusion In the case where the valve body holding frame body is removed from the rod body, the guide body is guided while being elastically deformed along the inclination of the upper part of the positioning section formed by When a force is applied to the valve body holding frame in the turning direction by a jig so that the twist is horizontally twisted, the valve body holding frame is guided by the inclined surface portion of the positioning portion, and the valve body holding frame is elastically deformed. Thus, the valve body holding frame can be easily attached to and detached from the rod body.

  A best embodiment of a bag with a backflow prevention valve of the present invention will be described with reference to FIGS.

  The main body 1 is formed of a synthetic resin, has an inflow side connection port 2 at the rear, an outflow side connection port 3 at the front, an invert portion 4 that connects the inflow side connection port 2 and the outflow side connection port 3, and this A cleaning port 5 that opens above the invert part 4 is provided. 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 step portion 10 is formed, and a substantially disc-shaped cleaning port lid (not shown) is supported on the support step portion 10 so as to be freely opened and closed.

  The outer end side of the inflow side connection port 2 of the main body 1 is an upstream connection pipe connection portion having an inner diameter substantially the same as the outer diameter of the connection pipe such as an upstream inflow drainage branch pipe communicating with the drainage facility. 11 is formed so that the inner diameter of the inflow side connection pipe inserted into and connected to the inflow side connection port 2 is substantially the same as the inner diameter of the inner end side of the inflow side connection port 2.

  In addition, the heel body 1 has a valve body 13 that closes the inflow side opening portion 12 abuts on the periphery of the inflow side opening portion 12 that opens from the inflow side connection port 2 to the invert portion 4. It is formed on the valve seat surface 14.

  Further, the bag main body 1 is provided with a plurality of support portions 15 formed at the upper end portions of the protrusions in the vertical direction facing the cleaning port 5, and the inflow side connection port. A positioning portion 16 is formed so as to face the upper position of the two inflow side openings 12. The positioning portion 16 is formed by a protrusion, the lower portion of the positioning portion 16 is formed on a horizontal plane 18, and the upper portion is formed on an inclined surface 19 inclined inwardly projecting inward. At least one of both side portions of the portion 16 is formed on an inclined surface 20 that is inclined in a direction in which the tip end side becomes narrower.

  Next, the valve body holding frame body 21 that rotatably holds the valve body 13 is formed of a synthetic resin, and the valve body 13 is placed below the rear base 21a of the valve body holding frame body 21. A shaft-shaped valve body holding portion 22 that is rotatably held is formed.

  Further, the lower surface portion of the recessed portion 24 of the rear base portion 21a located above the valve body holding portion 22 is engaged with the positioning portion 16 of the rod main body 1 so as to be freely engaged and disengaged. A jig engaging portion 25 is formed in the shape of a window hole, which is formed in the joint portion 23, and engages with an attaching / detaching jig when the valve body holding frame body 21 is attached / detached on the front surface of the recessed portion 24.

  Further, the valve body holding frame body 21 is integrally formed on both sides of the rear base portion 21a with attachment portions 26 for detachably mounting the valve body holding frame body 21 in the rod body 1 toward the front side. ing. The mounting portion 26 is substantially C-shaped in plan view with a part of the circumference of the hollow cylindrical shape cut out, and the height is 10% to 50% of the diameter of the hollow cylinder, preferably the diameter of the hollow cylinder. The outer diameter of the hollow cylinder is formed to be larger than the inner diameter of the rising pipe 6 connected to the cleaning port 5 of the rod body 1, and the valve body holding frame 21 is attached. The portion 26 is pressed against the inner surface of the rising tube 6 by a repulsive force in a state of being reduced in diameter to the inner peripheral surface of the rising tube 6.

  Further, on the upper part of the valve body 13, a shaft hole-like shaft support portion 31 is formed which is rotatably engaged with the shaft-like valve body holding portion 22 of the valve body holding frame body 21 in a rotatable manner. An opening 32 that allows the shaft support 31 to be engaged with and disengaged from the valve body holding portion 22 is formed at the rear of the shaft support 31.

  Further, an annular packing 27 that is in close contact with the valve seat surface 14 of the rod body 1 is provided on the outer peripheral surface of the valve body 13.

  Next, as shown in FIG. 4, the jig 28 is provided with a hook-shaped engagement portion 29 that is detachably engaged with the jig engagement portion 25 of the valve body holding frame 21 at the lower end portion. It is formed of a rod-like body, and a grip portion 30 is formed at the upper end portion.

  Next, a method of attaching the valve body holding frame body 21 to the heel body 1 will be described with reference to FIG.

  The cleaning mouth cover body installed on the ground surface is removed from the frame body 7, and the hook-shaped engagement portion 29 of the jig 28 is engaged with the jig engagement portion 25 of the valve body holding frame body 21. Is operated, and the valve body holding frame body 21 is inserted from the rising pipe 6 toward the cleaning port 5 of the bag main body 1.

  Then, the valve body holding frame body 21 is supported in the vertical direction by abutting and supporting the lower edge portion of the mounting portion 26 of the valve body holding frame body 21 on the support portion 15 of the rod body 1 and the valve body holding frame body. By positioning and holding 21 on the positioning portion 16 of the rod body 1, the valve body holding frame 21 is mounted in the rod body 1 by the mounting portion 26. In this state, the hook-shaped engagement portion 29 of the jig 28 is valved. Remove from the jig engaging portion 25 of the body holding frame 21.

  In other words, the valve body holding frame 21 is attached to the rising pipe 6 connected to the cleaning port 5 of the bag main body 1 with a repulsive force in a state where the mounting portion 26 is elastically reduced in diameter to the inner peripheral surface of the rising pipe 6. The valve body holding frame body 21 can be pushed down by the jig 28 while being pressed against the inner surface of the rising pipe 6. The height of the mounting portion 26 of the valve body holding frame body 21 is set to the height of the mounting portion 26. By setting the dimension to 10% or more of the diameter of the hollow cylinder, the valve body holding frame body 21 is pushed down as it is without rotating.

  The height of the mounting portion 26 of the valve body holding frame 21 is set to 50% or less of the diameter of the hollow cylinder forming the mounting portion 26, so that the rising pipe 6 and the valve body holding frame 21 are mounted. Since excessive friction does not occur with the part 26, the valve body holding frame 21 can be smoothly pushed down to a predetermined position.

  When the valve body holding frame body 21 is positioned and held on the positioning portion 16 of the rod main body 1, the engaged portion 23 below the recessed portion 24 formed in the rear base 21a of the valve body holding frame body 21 is , Guided while being elastically deformed along the upper slope of the protrusion of the positioning portion 16 of the rod body 1, and the engaged portion 23 of the recessed portion 24 is positioned and supported on the horizontal surface 18 below the positioning portion 16, The body holding frame 21 is positioned and held on the bag main body 1.

  The valve body 13 attached to the valve body holding frame body 21 with the valve body holding frame body 21 attached to the rod body 1 is connected to the inflow side opening 12 of the inflow side connection port 2 formed in the rod body 1. The inflow side opening 12 of the inflow side connection port 2 is closed by contacting the valve seat surface 14 formed on the periphery of the opening.

  Then, when the valve body 13 closes the inflow side opening 12 of the inflow side connection port 2 of the main body 1, the drainage that has flowed out of the drainage facility flows into the inflow side connection port 2 of the main body 1 from the drainage branch pipe. The drainage flows out from the invert part 4 to the outflow side connection port 3 by pushing the valve element 13 in contact with the valve seat surface 14 with water pressure.

  In addition, even if the waste water overflowing from the sewer main flows backward into the dredging body 1 from the outflow side connection port 3 of the dredging main body 1, the drainage is inflow side opening of the inflow side connection port 2 blocked by the valve body 13. Since it does not flow back to 12, it does not enter the inflow side connecting pipe, and the drainage from the drainage system in the house and the air pumped by this drainage do not blow out.

  When the valve body 13 is damaged, the jig 28 is engaged with the jig engaging portion 25 of the valve body holding frame body 21 to lift the valve body holding frame body 21 from the rising pipe 6 and The shaft-like valve body holding portion 22 of the body holding frame body 21 is removed from the opening 32 of the shaft-hole-like shaft support portion 31 against elasticity to replace the valve body 13, and the shaft support portion 31 of the new valve body 13 is replaced. The valve body holding portion 22 of the valve body holding frame body 21 is engaged from the opening portion 32, and the valve body 13 is rotatably attached to the rod main body 1.

  When the valve body holding frame body 21 is pulled out from the rod main body 1, at least one of both side portions of the protrusion of the positioning portion 16 is inclined in a direction in which the tip end side becomes thinner. When a force is applied to the valve body holding frame body 21 in the direction of rotation toward the side inclined by the jig 28 so as to be twisted, the valve body holding frame body 21 is guided by the inclined surface portion 20 of the protrusion and the valve The body holding frame body 21 is elastically deformed and disengaged from the protrusion, and the valve body holding frame body 21 can be pulled up by the jig 28.

  According to this embodiment, the valve body 13 is positioned and attached inside the valve body holding frame body 21, and the valve body 13 has an inner diameter of a drain pipe connected to the inflow side connection port 2 or the outflow side connection port 3. Regardless, it can be opened widely toward the cleaning port, drainage can flow from the inflow side connection port 2 to the outflow side connection port 3 via the invert part 4, and drainage can be effectively performed. It can be visually observed from the cleaning port 5 and can easily and reliably confirm troubles such as breakage of the valve body.

  Further, the valve body holding frame body 21 to which the valve body 13 is attached can be attached to the correct position by the positioning portion 16, and the valve body 13 is not displaced from the valve seat surface 14, and the valve body 13 is 14, the inflow side opening 12 of the inflow side connection port 2 is securely closed, and the valve body holding frame 21 is dropped by the mounting portion 26 being reliably supported by the support portion 15 of the rod body 1. Without any backflow.

  Further, the valve body holding frame body 21 to which the valve body 13 is attached is attached in a state where the attachment portion 26 is pressed by a repulsive force in a state where the diameter is reduced to the inner peripheral surface of the rising pipe 6, and is attached to the jig 28. The valve body holding frame 21 can be pushed down, but the height of the mounting part 26 of the valve body holding frame 21 is set to a dimension of 10% or more of the diameter of the hollow cylinder forming the mounting part 26. The holding frame 21 is mounted without being rotated, and the height of the mounting portion 26 of the valve body holding frame 21 is set to be 50% or less of the diameter of the hollow cylinder forming the mounting portion 26. The valve body holding frame 21 can be smoothly pushed down to a predetermined position and attached to a predetermined position without excessive friction between the riser tube and the attachment portion of the valve body holding frame.

  Further, the valve body holding frame body 21 is engaged and held at the lower part of the positioning portion 16 of the heel body 1, and when the valve body holding frame body 21 is positioned and held on the heel body 1, the positioning portion 16 formed by the protrusions. When the valve body holding frame body 21 is removed from the rod body 1, the valve body holding frame body 21 is placed horizontally. When a force is applied to the valve body holding frame body 21 in the rotating direction by the jig 28 so as to twist in the direction, the valve body holding frame body 21 is guided by the inclined surface portion 20 of the positioning portion 16 and is thereby moved to the valve body holding frame body 21. Is elastically deformed and disengaged from the positioning portion 16, and the valve body holding frame body 21 can be easily attached to and detached from the rod main body 1.

It is a vertical side view of a bag with a backflow prevention valve showing an embodiment of the present invention. It is a vertical side view of the bag main body of a bag with a backflow prevention valve same as the above. It is a top view of a ridge main body same as the above. It is a vertical side view which shows the state which installed the scissors with a backflow prevention valve same as the above. It is a top view of the valve body holding frame of a scissor with a backflow prevention valve same as the above. It is a side view of a valve body holding frame same as the above.

Explanation of symbols

1 桝 Body 2 Inlet side connection port 3 Outlet side connection port 4 Invert part 5 Cleaning port 6 Rise pipe
12 Inlet opening
13 Disc
14 Valve seat
15 Support part
16 Positioning part
21 Disc holding frame
22 Valve holder
25 Jig engagement part
26 Mounting area
28 Jig

Claims (3)

A saddle body formed with 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, and a detachable attachment to the main body A scissor with a backflow prevention valve provided with a valve body holding frame that can be freely attached and that rotatably holds a valve body that closes the inflow side opening that communicates with the invert part of the inflow side connection port. Because
The saddle body has a valve seat surface that abuts the valve body on the periphery of the inflow side opening that opens from the inflow side connection port to the invert portion, so as to close the inflow side opening, and A support portion for supporting the valve body holding frame body in the vertical direction, and a positioning portion for positioning the valve body holding frame body in the main body,
The valve body holding frame includes a valve body holding portion that rotatably holds the valve body, an attachment portion that detachably attaches the valve body holding frame body to the rod body, and a valve body holding frame body. A scissors with a backflow prevention valve, characterized by having a jig engaging portion with which the attaching / detaching jig engages when attaching / detaching. The attachment portion of the valve body holding frame is substantially C-shaped in plan view with a part of the circumference of the hollow cylindrical shape cut out, and the height is 10% to 50% of the diameter of the hollow cylinder. And the outer diameter of the hollow cylinder is larger than the inner diameter of the riser pipe connected to the cleaning port of the main body,
2. The backflow prevention according to claim 1, wherein the attachment portion of the valve body holding frame is pressed against the inner surface of the rising pipe by a repulsive force in a state of being reduced in diameter to the inner peripheral surface of the rising pipe. Spear with valve.   The positioning part of the heel body is formed by a protrusion that protrudes inside the heel body, and this protrusion is horizontal at the lower part where the valve body holding frame is engaged and held, and the valve body holding frame is guided when installed. The scissors with a backflow prevention valve according to claim 1 or 2, wherein the upper part is inclined downward, and at least one of both side parts is inclined in a direction in which the tip end side becomes thinner.

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