JP7412179B2 - Joint pipe, joint pipe with valve - Google Patents

Description

The present invention relates to a joint pipe for connecting drain pipes and a joint pipe with a valve.

In recent years, abnormal weather caused by factors such as global warming has led to the occurrence of so-called torrential rains, in which large amounts of precipitation occur in a short period of time. When such torrential rains occur, a large amount of rainwater flows into drainage pipes, and the amount of water that can be discharged exceeds the amount of water that can be drained, causing a backflow. If wastewater backflows in a drainpipe, there is a concern that, for example, it will be difficult to drain water from a toilet or bathroom in a building such as a general house.

In order to prevent the waste water that has flowed back through the drain pipes from reaching the drainage equipment of the building, a backflow prevention valve is provided in the water passage section of the drain pipe of the building. For example, Patent Document 1 discloses a backflow prevention device in which a valve having rubber elasticity is provided in a conduit.
Further, Patent Document 2 discloses a basin with a backflow prevention valve, which is a dedicated drainage mass to which a valve body can be attached.

Japanese Patent Application Publication No. 2016-199943 Japanese Patent Application Publication No. 2010-126888

However, in the backflow prevention device disclosed in Patent Document 1, a step (harmful step) that receives the edge of the valve body is formed on the inner circumferential surface of the cylindrical main body through which wastewater flows. There was a possibility that filth such as solids contained in the wastewater would accumulate and obstruct the flow of the wastewater. Furthermore, there was a risk that the valve would no longer operate due to the solidification of accumulated dirt. In addition, there was a risk that the valve would not close completely during backflow due to accumulated and fixed dirt.
Further, in this backflow prevention device, since the valve body is fixed to the cylindrical main body, it is difficult to remove the valve body, so there is also a problem that maintenance of the valve body is difficult.

On the other hand, the basin with a check valve disclosed in Patent Document 2 does not have a structure in which the valve can be easily attached and detached, so the optimum valve is selected, attached, and replaced according to the hydraulic performance during normal use. It was also difficult to replace the valve due to damage.

The present invention has been made in consideration of these circumstances, and provides a joint pipe and a joint pipe with a valve that prevent the accumulation of solid content in waste water and facilitate maintenance of the valve body. With the goal.

In order to solve the above problems, the present invention proposes the following means.
That is, the joint pipe of the present invention is a tubular joint pipe that connects a cylindrical first drain pipe and a second drain pipe, and has a first pipe that engages with the outer circumferential surface of the first drain pipe. and a second engaging portion that engages with the inner circumferential surface of the second drain pipe, and the first drain pipe is inserted from one end to the first engaging part. The second drainage pipe can be engaged with the second engaging part by being inserted from the other end side, and the inner diameter of the other end side is equal to that of the first drainage pipe. A valve mounting portion that is the same as or larger than the inner diameter of the second engaging portion and smaller than the outer diameter of the second engaging portion and that removably and rotatably supports a valve body for opening and closing the pipeline is attached to the other end side. , the first drain pipe is arranged upstream of the second drain pipe in the outflow direction of the waste water, and the inner diameter of the other end side of the first engaging part is smaller than the second drain pipe. It is characterized by being smaller than the inner diameter of the tube .

Further, in the present invention, the inner circumferential surface on the other end side of the first engaging portion may constitute a surface that is continuous with the inner circumferential surface of the first drain pipe at least at the bottom thereof. It may be .

Further, in the present invention, the inner circumferential surface on the other end side of the first engaging portion and the inner circumferential surface of the first drain pipe may constitute a mutually continuous surface over the entire circumference. good.

Further, in the present invention, the first drain pipe is disposed upstream of the second drain pipe in the outflow direction of the waste water, and the inner diameter of the other end side of the first engaging portion is smaller than the second drain pipe. may be smaller than the inner diameter of the drain pipe.

Further, in the present invention, the opening end portion may be formed to be inclined with respect to the diametrical direction.

Moreover, in the present invention, a packing may be formed in the second engaging portion to be in contact with an inner circumferential surface of the second drain pipe.

Further, in the present invention, the second drain pipe is a branch drain pipe that branches into two, and the second engaging portion is connected to one of the branch destinations at the branch portion of the branch drain pipe. You can leave it there.

A joint pipe with a valve according to the present invention is characterized by having the joint pipe described in each of the above items and a valve body attached to the valve mounting portion.

Further, in the present invention, the valve body may be formed with a handle that is held when the valve body is attached to the valve mounting portion.

According to the present invention, it is possible to provide a joint pipe and a joint pipe with a valve that prevent solid content from accumulating in waste water and facilitate maintenance of a valve body.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external perspective view which shows the joint pipe with a valve which is 1st Embodiment of this invention. FIG. 2 is a sectional view showing a cross section along the longitudinal direction of the valved joint pipe shown in FIG. 1; It is a sectional view showing a joint pipe with a valve which is a second embodiment of the present invention. It is a sectional view showing a joint pipe with a valve which is a third embodiment of the present invention. It is a sectional view showing the joint pipe with a valve which is a 4th embodiment of the present invention. It is a sectional view showing a joint pipe with a valve which is a 5th embodiment of the present invention. It is a perspective view when a joint pipe with a valve which is a 5th embodiment is seen from above.

EMBODIMENT OF THE INVENTION Hereinafter, a joint pipe and a joint pipe with a valve according to an embodiment of the present invention will be described with reference to the drawings. It should be noted that each of the embodiments shown below will be specifically described in order to better understand the gist of the invention, and unless otherwise specified, the embodiments are not intended to limit the invention. Furthermore, in order to make the features of the present invention easier to understand, the drawings used in the following explanation may show important parts enlarged for convenience, and the dimensional ratio of each component may be the same as the actual one. Not necessarily.

(First embodiment)
FIG. 1 is an external perspective view showing a valved joint pipe (separated from a valve body) according to a first embodiment of the present invention. Moreover, FIG. 2 is a sectional view showing a cross section along the longitudinal direction of the valved joint pipe shown in FIG.
In the following description, the valved joint pipe 10 of this embodiment is installed between the cylindrical first drain pipe 31 on the upstream side and the cylindrical second drain pipe 32 on the downstream side. This will be explained using an example provided.

The valved joint pipe 10 of this embodiment includes a joint pipe 11 and a valve body 21 that is detachably attached to the joint pipe 11.
The joint tube 11 has a substantially cylindrical outer shape, and is formed with a through hole 12 having a substantially circular cross section passing through one end 11a side and the other end 11b side. The first drain pipe 31 is inserted into the through hole 12 from the open end 12a forming the one end 11a side of the through hole 12 so as to be in contact with the outer peripheral surface 31u of the first drain pipe 31. A portion 13 is formed.

The first engaging portion 13 is a portion having an inner diameter φ1, which is obtained by enlarging a portion of the through hole 12 by the wall thickness t1 of the first drain pipe 31. That is, if the inner diameter of the open end 12b forming the other end 11b side of the through hole 12 is φ2, then the inner diameter φ1 of the open end 12a forming the one end 11a side is equal to or larger than φ2+(t1×2). is also slightly larger.

In the following description, a region of the through hole 12 that is closer to the open end 12b than the end (stepped portion) on the back side of the first engaging portion 13 will be referred to as the other end region E.

With this configuration, the inner diameter φ2 of the other end region E of the through hole 12 (that is, the inner diameter of the open end 12b) becomes the same as the inner diameter φ3 of the first drain pipe 31. Therefore, the inner circumferential surface 31n of the first drain pipe 31 and the inner circumferential surface En of the other end region E of the through hole 12 constitute the same circumferential surface that is continuous with each other and has no level difference (harmful level difference).

Note that, as in the present embodiment, the inner circumferential surface En of the through hole 12 on the other end side (the other end region E) than the first engaging portion 13 and the inner circumferential surface 31n of the first drain pipe 31 are completely connected to each other. In addition to forming surfaces that are continuous with each other over the circumference, for example, the inner peripheral surface En and the first drainage surface on the other end side (other end region E) of the through hole 12 than the first engaging portion 13 The inner circumferential surface 31n of the tube 31 may constitute a continuous surface at the bottom, and the other portion may have a step due to a difference in inner diameter.

The joint pipe 11 is formed with a second engaging portion 14 into which the second drain pipe 32 is inserted from the other end 11b side so that the outer circumferential surface 11u and the inner circumferential surface 32n of the second drain pipe 32 are in contact with each other. ing. The outer diameter φ4 of the joint pipe 11 in the second engaging portion 14 is the same as or slightly smaller than the inner diameter φ5 of the second drain pipe 32. The inner diameter φ2 of the other end region E of the through hole 12 is smaller than the inner diameter φ5 of the second drain pipe 32.

Therefore, when going from the other end region E of the through hole 12 toward the second drain pipe 32, a step is created in the direction in which the inner diameter widens at the open end 12b. The formation area of the second engaging part 14 overlaps with the first engaging part 13 in the direction of the central axis C.

Further, a packing 25 is formed on the outer circumferential surface 11u of the second engaging portion 14 of the joint pipe 11. This packing 25 is a ring-shaped elastic body made of, for example, water-resistant synthetic rubber. It is preferable that a groove for holding the packing 25 is formed in the outer circumferential surface 11u of the joint pipe 11.

For example, in the second engagement portion 14, the packing 25 is inserted into the joint pipe 11 and the second drain pipe 32 from a gap between the outer peripheral surface 11u of the joint pipe 11 and the inner peripheral surface 32n of the second drain pipe 32. Prevent the leakage of wastewater and its odor.

Further, a rib 24 that is folded back so as to wrap around the edge portion of the second drain pipe 32 may be formed at the end of the second engaging portion 14 of the joint pipe 11 near the one end 11a. With such ribs 24, for example, the top and bottom (top and bottom) of the valve body can be determined visually. In addition, since the rib 24 is caught, the second engaging portion 14 of the joint pipe 11 and the second drain pipe 32 can be engaged without tilting.

A valve mounting portion 22 that removably supports the valve body 21 is formed on the other end 11b side of the joint pipe 11. This valve attachment part 22 is made up of, for example, two protruding plates 22a, 22a that protrude from the other end 11b of the joint pipe 11 at a distance from each other, and openings 22b, 22b are respectively formed therein.

The valve body 21 opens and closes the open end 12b on the other end 11b side of the joint pipe 11, and is a substantially disc-shaped member that can close the through hole 12. This valve body 21 includes two protruding plates 21a, 21a that are spaced apart from each other and protrude outward, and cylindrical engagement pins 21b, 21b formed at the tips of the protruding plates 21a, 21a, respectively. is formed.

Such a valve body 21 is constructed by curving the two protruding plates 21a, 21a toward each other, and fitting the engaging pins 21b, 21b into openings 22b, 22b formed in the protruding plates 22a, 22a of the joint pipe 11. By doing so, it is engaged with the open end 12b of the joint pipe 11 so as to be openable and closable.

Note that the form of engagement between the valve body 21 and the valve mounting portion 22 is not limited to the above-mentioned shape. For example, the valve mounting portion may be a rectangular or circular recess. In this case, by making the engagement pin of the valve body U-shaped in cross section, the valve body can be installed by hooking the engagement pin of the valve body on the valve mounting portion. With such a configuration, the valve body can be attached more easily.

According to the valved joint pipe 10 including the joint pipe 11 of the first embodiment of the present invention as described above, in the joint pipe 11 to which the valve body 21 can be attached, the first engagement portion 13 of the through hole 12 The inner diameter φ2 of the other end region E, which is closer to the other end 11b, and the inner diameter φ3 of the first drain pipe 31 are made the same, so that the inner circumferential surface 31n of the first drain pipe 31, the other end of the through hole 12, etc. The inner circumferential surface En of the end region E constitutes the same circumferential surface that is continuous with the inner circumferential surface En and has no step difference (harmful step difference).

As a result, the waste water flowing into the joint pipe 11 from the first drain pipe 31 on the upstream side flows smoothly toward the open end 12b without resistance, and the solid content contained in the waste water is deposited due to the presence of steps etc. There's nothing to do. Therefore, there is no need to remove deposits within the joint pipe 11 for a long period of time, and maintenance costs for the drain pipe can be reduced.

Further, according to the valved joint pipe 10 including the joint pipe 11 of the first embodiment of the present invention, the valve body 21 can be easily attached to and detached from the joint pipe 11, so that the valve body 21 can be removed and removed. It is easy to clean the valve body 21 or replace the valve body 21, and it is possible to reduce the effort and cost associated with maintenance of the valve body.

In addition, since the valve body 21 can be easily attached to and removed from the joint pipe 11, the valve body 21 is not provided at the time of installation of the joint pipe 11, and the valve body 21 is added and provided later as necessary. It is also easy to do so, and the initial cost of installing the drain pipe can be reduced.

In addition, by making the diameter of the valve body 21 a small diameter that is almost the same as the inner diameter φ3 of the first drain pipe 31, even when the valve body 21 is opened, it can reach the main pipe (not shown) connected to the second drain pipe 32. The valve body 21 does not protrude. In particular, since the valve mounting portion 22, which is the hinge position that rotatably supports the valve body 21, can be located closer to the center than the inner circumferential surface 32n of the second drain pipe 32, that is, at a lower position along the vertical direction, The stroke of the valve body 21 can be made smaller. Furthermore, by installing the valve body 21 at an angle of 90° or less with respect to the longitudinal direction of the first drain pipe 31, it is possible to prevent drainage from entering from one flow path into the flow path on the side where the check valve is installed. Since this is possible, the valve body 21 can also be used as a rectifying plate for drainage.

(Second embodiment)
FIG. 3 is a sectional view showing a valved joint pipe according to a second embodiment of the present invention. In addition, in this embodiment, the same numbers are given to the same components as in the first embodiment, and redundant explanations are omitted.
The valved joint pipe 40 of this embodiment includes a joint pipe 41 and a valve body 21 that is detachably attached to the joint pipe 41.
The joint pipe 41 is formed such that an open end 42a of the through hole 42 on the other end 41b side is inclined with respect to the vertical direction. Specifically, the length between the open end 42a of the through hole 42 and the one end 41a is shorter on the lower side in the vertical direction than on the upper side in the vertical direction.

With this configuration, the valve body 21 rotatably attached to the valve mounting portion 22 is normally suspended vertically, so that the valve body 21 is vertically suspended below the opening end 42a. A constant gap G is always formed between the valve body 21 and the valve body 21. Due to this gap G, when a small amount of waste water flows from the first drain pipe 31 on the upstream side, the waste water flows from this gap G toward the second drain pipe 32 without almost touching the valve body 21. leak. Thereby, it is possible to suppress the accumulation of solid content in the waste water on the valve body 21, and to facilitate the maintenance of the valve body 21.

In addition, by forming a gap G between the open end 42a and the valve body 21, during normal use, the first drain pipe 31 on one side and the other side with the valve body 21 as a boundary. It is possible to prevent an internal pressure difference from occurring with a certain second drain pipe 32.

Note that the slope of the opening end 42a is set opposite to the present embodiment so that the length between the opening end 42a of the through hole 42 and the one end 41a is longer on the lower side in the vertical direction than on the upper side in the vertical direction. It can also be formed. In this case, since the open end 42a is always reliably closed by the valve body 21, odor etc. flows backward from the second drain pipe 32 on the downstream side to the second drain pipe 32 on the upstream side. This can be prevented.

(Third embodiment)
FIG. 4 is a sectional view showing a valved joint pipe according to a third embodiment of the present invention. In addition, in this embodiment, the same numbers are given to the same components as in the first embodiment, and redundant explanations are omitted.
In this embodiment, a second drain pipe 35 having one end branched into two is connected as the second drain pipe downstream of the joint pipe 11. This second drain pipe 35 has a first opening 35A and a second opening 35B that are arranged on a line L1 with each other, and a third opening 35C that is arranged on a direction L2 perpendicular to this line L1. .

The joint pipe 11 is connected to the second opening 35B of the second drain pipe 35. In such an embodiment, the joint pipe 11 can be easily approached from the third opening 35C, so for example, the valve body 21 can be added and attached to the joint pipe 11 later, or the valve body 21 can be removed. Maintenance such as cleaning can be easily performed.

(Fourth embodiment)
FIG. 5 is a sectional view showing a valved joint pipe according to a fourth embodiment of the present invention. In addition, in this embodiment, the same numbers are given to the same components as in the first embodiment, and redundant explanations are omitted.
In this embodiment, a second drain pipe 35 having one end branched into two is connected as the second drain pipe downstream of the joint pipe 11. This second drain pipe 35 has a first opening 35A and a second opening 35B that are arranged on a line L3 with each other, and a third opening 35C that is arranged on a direction L4 perpendicular to this line L3. .

Further, the joint pipe 11 is connected to the second opening 35B of the second drain pipe 35. The inner diameter φ3 of the first drain pipe 31 constituting the joint pipe 11 is substantially the same as the inner diameter φ5 of the second drain pipe 35 on the second opening 35B side, and the connection form has the same diameter.

Even in such an embodiment, the joint pipe 11 can be easily approached from the third opening 35C, so for example, the valve body 21 can be added and attached to the joint pipe 11 later, or the valve body 21 can be removed. Maintenance such as cleaning can be easily performed. Furthermore, since there is no step (harmful step) in which the inner diameter narrows toward the downstream side, it is possible to suppress the accumulation of solids in the waste water between the joint pipe 11 and the second drain pipe 35. , maintenance can be facilitated.

In addition, if only the joint pipe 11 is provided between the first drain pipe 31 and the second drain pipe 35, and the valve body 21 is installed later as necessary, the initial cost can be reduced. , a drain pipe to which a valve body can be attached can be constructed.

(Fifth embodiment)
FIG. 6 is a sectional view showing a valved joint pipe according to a fifth embodiment of the present invention. Moreover, FIG. 7 is a perspective view of the valved joint pipe according to the fifth embodiment when viewed from above.
A second drain pipe 71 having one end branched into two is connected to the other downstream end 61b of the joint pipe 61 constituting the valved joint pipe 60 of this embodiment.

In the valved joint pipe 60 of this embodiment, a valve mounting portion 62 that removably supports the valve body 51 is formed on the other end 61b side of the joint pipe 61. The valve attachment portion 62 has, for example, a curved slit-shaped insertion groove that is integrally formed on the outside of the outer circumferential surface 61u on the other end 61b side of the joint pipe 61 and extends along the outer circumferential surface 61u.

On the other hand, the valve body 51 of this embodiment includes a valve body 52 that opens and closes the opening end on the other end 61b side of the joint pipe 61, and a valve body base 53 that rotatably supports the valve body 52. has. The valve body base 53 has an engaging portion 54 formed of a curved plate-shaped insertion piece that can be inserted into a slit-shaped insertion groove of the valve attachment portion 62 formed on the other end 61b side of the joint pipe 61, and an engagement portion 54 that is in an attached state. and a hollow cylindrical handle 55 formed to protrude upward, are each integrally formed. It is preferable that the valve mounting portion 62 and the engaging portion 54 have an engaging pawl that is fixed in an engaged state with each other and a hole into which the engaging pawl enters.

As shown in FIG. 6, a triangular guide piece 54a is integrally formed on the upper surface of the curved plate-shaped insertion piece that constitutes the engaging portion 54. As shown in FIG. Further, a triangular guide groove 62a capable of receiving the triangular guide piece 54a is formed in the valve mounting portion 62 of the joint pipe 61 into which the engaging portion 54 is inserted.

A general pipe P can be inserted into the handle 55 formed into a hollow cylindrical shape. Further, an opening 55a is formed at the upper end of the handle 55. For example, a chain or string can be attached to such an opening 55a.

According to the valved joint pipe 60 of the fifth embodiment having such a configuration, when newly attaching the valve body 51 to the other end 61b side of the joint pipe 61 from a state in which only the joint pipe 61 is already provided, Makes work easier. That is, the operator grasps the handle 55 of the valve body base 53 and inserts the valve body 51 into the second drain pipe 71 from the third opening 71C side of the vertically extending branch pipe of the second drain pipe 71. The engaging portion 54 of the valve body 51 can be easily inserted and attached to the valve attachment portion 62 of the joint pipe 61.

When installing the valve body 51, the valve body 51 is guided to the correct installation position with respect to the joint pipe 61 by the triangular guide piece 54a and the guide groove 62a, so that the valve body 51 is guided to the correct installation position with respect to the joint pipe 61. It can be easily installed in the correct position without having to perform time-consuming work such as positioning the parts 51 and 51. In addition, by visually checking whether there is a gap between the triangular guide piece 54a and the guide groove 62a after installation, it is possible to check whether the engaging part 54 of the valve body 51 is correctly inserted all the way into the valve mounting part 62. It can be confirmed.

Furthermore, if the valve mounting portion 62 and the engaging portion 54 are formed with an engaging claw and a hole into which the engaging claw enters, the sound when these engage with each other will cause the engaging portion of the valve body 51 to 54 is correctly inserted all the way into the valve mounting portion 62 without visual confirmation.

Furthermore, since the handle 55 of the valve body 51 is formed into a hollow cylindrical shape, the length of the handle 55 can be easily increased by inserting a general hollow pipe P into the handle 55 of the valve body 51. can. As a result, even if the second drain pipe 71 or the joint pipe 61 is buried deep below the ground surface, the pipe P with the length of the handle 55 extended can be gripped and the joint pipe 61 The engaging portion 54 of the valve body 51 can be easily inserted and attached to the valve attachment portion 62.

Further, one end of a chain or string is attached to an opening 55a formed at the upper end of the handle 55, and the other end is attached to the inside of a lid member provided on the third opening 71C side of the second drain pipe 71. By locking, even if the valve body 51 comes off from the valve mounting portion 62 due to large water pressure due to heavy rain or the like, the valve body 51 can be prevented from flowing out.

Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention as well as within the scope of the invention described in the claims and its equivalents.

For example, in the embodiment described above, the first drain pipe and the second drain pipe connected to the joint pipe are both straight pipes, or the second drain pipe is a branch pipe in two directions. However, the shape of the drain pipe connected to the joint pipe is not limited to either the upstream side or the downstream side, and a drain pipe of any shape can be connected and used.

10... Joint pipe with valve 11... Joint pipe 12... Through hole 13... First engaging part 14... Second engaging part 21... Valve body 31... First drain pipe 32... Second drain pipe

Claims (6)

A tubular joint pipe connecting a first drain pipe and a second drain pipe each having a cylindrical shape,
a first engaging portion that engages with an outer circumferential surface of the first drain pipe; and a second engaging portion that engages with an inner circumferential surface of the second drain pipe;
The first drain pipe can be engaged with the first engaging portion by being inserted from one end side,
The second drain pipe can be engaged with the second engaging portion by being inserted from the other end side,
The inner diameter of the other end is the same as or larger than the inner diameter of the first drain pipe, and smaller than the outer diameter of the second engaging part,
having a valve mounting part on the other end side that removably and rotatably supports a valve body for opening and closing the pipeline;
The first drain pipe is disposed on the upstream side of the second drain pipe in the outflow direction of the waste water, and the inner diameter of the other end of the first engaging portion is equal to the inner diameter of the second drain pipe. A joint pipe characterized by being smaller than . A claim characterized in that the inner circumferential surface on the other end side of the first engaging portion can constitute a surface that is continuous with the inner circumferential surface of the first drain pipe at least at the bottom thereof. The joint pipe according to item 1. The second drain pipe is a branch drain pipe that branches into two, and the second engaging portion is connected to one of the branch destinations at the branch portion of the branch drain pipe. The joint pipe according to claim 1. 2. The joint pipe according to claim 1, wherein the valve mounting portion has a slit-shaped insertion groove formed outside the outer circumferential surface of the other end and curved along the outer circumferential surface. A joint pipe with a valve, comprising the joint pipe according to claim 1 and a valve body attached to the valve mounting portion. A triangular guide piece is formed on the insertion piece that engages with the valve mounting part of the valve body, and a triangular guide groove for receiving the guide piece is formed in the valve mounting part. The valved joint pipe according to claim 5.

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