JP2002250493A - Sewage saddle joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewage saddle joint, capable of easily carrying out boring work for a sewer main pipe at an installation site of a sewer pipe line by using a hole saw. SOLUTION: In the joint for convergence mounted on the sewer main pipe by a saddle, the other coupling part is a socket/to which a pipe having a opening diameter bigger than the opening diameter on the saddle side is coupled. In this case, it is preferable that a joint body between a saddle and a socket be contracted in the radial direction toward the saddle side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to joining a branch pipe to a sewage main pipe in a case where waste water generated in a surrounding detached house, an apartment house, a store, a factory, etc. is drained and piped to the sewage main pipe. Related to sewage saddle fittings.

[0002]

2. Description of the Related Art In a conventional drainage pipe, it is natural to pipe a small-diameter branch pipe to a large-diameter sewage main pipe. Therefore, to join the branch pipe to the sewer main pipe,
There was no problem if the sewage main side was joined using a saddle, and the branch side was joined using a sewage saddle joint having the same diameter as the branch pipe used as the receiving port. However, when a synthetic resin pipe made of a vinyl chloride resin with a smooth inner surface can be buried under the road as a sewage main pipe, a small-diameter synthetic resin pipe is used as the sewage main pipe due to the improvement of scavenging performance. It has become.
For example, conventionally, a fume pipe having a nominal diameter of 200 mm or more is often used as a sewage main pipe, and a nominal diameter of 15 mm is used as a branch pipe.
Although a 0 mm synthetic resin pipe has been used, in recent years, a synthetic resin pipe having a nominal diameter of 150 mm has been used as a sewage main pipe.

[0003] When the sewage main pipe has a nominal diameter of 150 mm, a branch pipe having a nominal diameter of 125 mm or 100 mm is often used. Depending on the place of occurrence, safety is expected,
In some cases, a branch pipe having a nominal diameter of 150 mm may be used. For example, when piping having the same diameter as the nominal diameter of 150 mm is used for both the sewage main pipe and the branch pipe, a connection hole corresponding to the nominal diameter of 150 mm cannot be formed in the sewage main pipe. Joints cannot be used. Therefore, using a special sewage saddle joint with an elliptical inner circumferential surface on the saddle side, align the major axis of the ellipse with the axial direction of the sewage main pipe, and also make an elliptical connection hole in the sewage main pipe. In this case, a sewage saddle joint is connected to a sewage main pipe. In this sewage saddle joint, the branch main body has a circular shape on the receiving side and an elliptical shape on the saddle side. To maintain the full flow rate while maintaining the same cross-sectional area.

[0004]

In a special sewage saddle joint having an elliptical inner peripheral surface on the saddle side as described above, an elliptical hole is formed in the sewage main pipe when joining to the sewage main pipe. There is a problem that the drilling operation becomes complicated because it is necessary to perform the drilling. In other words, in the drilling work at the pipe construction site, a circular hole can be drilled with a hole saw, but when it becomes elliptical, a number of small circular holes are drilled along the elliptical edge to form a rough elliptical hole. It must be cut into an elliptical shape with a cutting tool such as open or file. Therefore, not only is the drilling operation itself complicated, but also it is difficult to drill into an elliptical shape that matches the saddle joint. It is necessary to perform a complicated operation of doing so.

SUMMARY OF THE INVENTION The present invention has been made with a view to solving the above-mentioned problems by paying attention to blind spots in the conventional piping design. It is an object of the present invention to provide a sewage saddle joint that can be easily performed using a horsaw.

[0006]

In order to achieve the above object, a sewage saddle joint according to the first aspect of the present invention is a joint for joining which is attached to a sewage main pipe with a saddle, and the other joint portion is a saddle side. The sewage saddle joint was used as a receiving port for joining a branch pipe having a diameter larger than the diameter.

The sewage saddle joint according to the second aspect of the present invention is the sewage saddle joint according to the first aspect, wherein a joint body between the saddle and the receiving port is reduced in diameter toward the saddle side.

The sewage saddle joint according to the present invention is formed by injection-molding a synthetic resin such as a vinyl chloride resin in which one joint is a saddle and the other joint is a receiving port. The saddle has a circular, square, rectangular or other shape having a curvature close to the outer peripheral surface of the sewage main pipe, and has a circular hole at the center of the saddle. If a fitting ridge is provided on the periphery of the saddle on the side in contact with the sewage main pipe, the fitting of the sewage main pipe with the saddle is performed by fitting the fitting hole into the circular hole provided in the sewage main pipe. Positioning can be performed, and joining while maintaining the flow path of the branch pipe can be reliably performed.

The joint on the side opposite to the saddle is formed as a socket for inserting and joining a branch pipe. This socket is
A seal packing is attached to the inner periphery of the receiving port, and a receiving port of a type in which a branch pipe is inserted and joined, or a type of a type in which the branch pipe is bonded to an outer peripheral surface of the inserted branch pipe with an adhesive may be used.

In the sewage saddle joint of the present invention, the receiving port is formed as a receiving port for joining a branch pipe having a diameter larger than that of the saddle side, and the receiving body side is a large joint body between the saddle and the receiving port. The caliber and saddle side have a small caliber. The diameter of the saddle side may be any diameter that can be used for drilling a connecting hole in the sewer main pipe, but the nominal diameter of the saddle side is usually one size smaller than the diameter of the branch pipe. It should just be. The joint body between the saddle and the receiving port is preferably formed into a shape in which wastewater flowing from the branch pipe flows smoothly. For example, the nominal diameter of both the sewage main pipe and the branch pipe is 15
In the case of a 0 mm vinyl chloride resin tube, the receiving port has a nominal diameter of 150 mm, the saddle side has a nominal diameter of 125 mm,
Even if the diameter is gradually reduced from the receiving side to the saddle side,
The diameter may be reduced at a part of the joint body. Further, the joint body may have the same small diameter as the saddle-side diameter over the entire length. However, in this case, there will be a level difference from the branch pipe on the receiving side.
It is preferable to provide the receiving port eccentrically so that the inner surface below the joint main body portion coincides with the inner surface of the branch pipe.

The branch pipes are often joined at right angles to the pipe axis of the sewage main pipe, but there are cases where they are joined at various angles, and also at various angles with respect to the horizontal plane. Since there are cases in which the joint body is joined, it is preferable to arrange the joint body that is inclined or bent in various directions with respect to the saddle axis. For example, the bending angle between the axis of the saddle and the axis of the receiving port in the circumferential direction of the sewage main pipe is from 0 degree to 1 degree.
The saddle axis and the socket axis are angled so that they join the branch pipe at an angle of 0, 30, and 60 degrees in the axial direction of the sewage main pipe to 90 degrees every 5 degrees, respectively. It is preferable to align Angles smaller than this can be joined by adjusting the piping of the branch pipe.

When there is no sewage saddle joint at an appropriate angle at the piping site of the sewage main pipe, a bent pipe joint is connected to the socket of the joint, and a branch pipe is connected to the socket of the bent pipe joint. You may join. In particular, if a flexible pipe which can bend the branch pipe to which the receiving port is connected around the axis as the bent pipe joint is used, it can be joined to the branch pipe in a wide range of directions.

[0013] The sewage saddle joint of the above invention is joined to the branch pipe by plug-in bonding or plug-in bonding via a sealing packing mounted on the inner periphery of the receptacle, and the sewage main pipe is coated with an adhesive on the inner surface of the saddle. Then, the hole of the saddle is aligned with the hole drilled by the forsaw in the sewage main pipe, and bonded by bonding. When a fitting ridge is provided on the periphery of the saddle on the side that comes into contact with the sewage main pipe provided in the saddle, the sewage main pipe and the saddle can be fitted by fitting into the circular hole provided in the sewage main pipe. It is preferable because the positioning of the fitting with can be performed. Also,
In the case of bonding with an adhesive, the bonding force is weak until curing proceeds even with a two-component mixed type adhesive. Therefore, it is preferable to fix the saddle to the sewage main line at the time of construction.

[0014]

[Operation] In the sewage saddle joint configured as described above, when joining the joint to the sewage main pipe, the joining position of the joint is determined, and the saddle is joined by simply drilling a circular hole of a predetermined diameter with a forsaw. Therefore, drilling work is simplified, and piping work can be easily performed.

In the present invention, the wastewater flowing down the branch pipe is reduced in flow passage cross-sectional area at the joint main body of the saddle joint. However, since the branch pipe has the same nominal diameter as the sewage main pipe, the wastewater flows down. However, it is not conceivable to design a piping in which a branch pipe becomes full and flows down. The branch pipe is provided with a pipe having the same diameter as the sewage main pipe when there is a margin in the nominal diameter of the pipe used as the branch pipe. Therefore, even if the inner diameter of the joint body on the saddle side of the sewage saddle joint is smaller than that of the branch pipe, there is almost no problem. In view of this point, the present invention has conceived a shape that cannot be considered in a conventional sewage saddle joint.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. In FIG. 1, reference numeral 1 denotes a sewage saddle joint of the present invention, which comprises a saddle 2, a socket 3, and a joint main body 4. 5 is a sewage main pipe, 6 is a branch pipe, and both have a nominal diameter of 150 mm. The saddle 2 has a curved rectangular shape in contact with the outer peripheral surface of the sewage main pipe 5, and has a circular hole 21 at the center. The circular hole 21 forms an inner surface of the joint body 4 on the small diameter side. An annular fitting ridge 22 is provided on the inner peripheral surface of the saddle of the circular hole 21.

The receptacle 3 is a joint with the branch pipe 6 and has a packing 31 mounted therein, and can be joined by simply inserting the branch pipe 6. The joint body 4 is a bent pipe having a nominal diameter of 125 mm, and has a saddle 2 formed on one side and a receiving port 3 formed on the other side. The axis of the saddle 2 and the axis of the socket 3 are at an angle of 60 degrees. The connecting portion 32 between the socket 3 and the joint body 4 is
Is formed eccentrically so that the lower inner surface thereof is continuous with the inner surface of the branch pipe 6 inserted into the receiving port 3.
The step from the to the joint body 6 is reduced.

In order to join the branch pipe 6 to the sewage main pipe 5 using the sewage saddle joint 1, the junction position of the branch pipe 6 to the sewage main pipe 5 laid in the excavated groove is determined. Determine the axial center position of the saddle mounting of the saddle joint 1. Next, a circular hole having a diameter in which the fitting ridge 22 is fitted is opened with a forsaw. An adhesive is applied to the inner peripheral surface of the saddle 2 of the sewage saddle joint 1 to
Is fitted into and adhered to the circular hole formed in the sewer main pipe 5. In order to ensure the adhesion, the saddle 2 may be fixed to the sewage main pipe 5 at the both ends in the axial direction of the sewage main pipe 5 by a number line. Next, when the branch pipe 6 is inserted into the receptacle 3 of the sewage saddle joint 1, the joining of the branch pipe 6 to the sewage main pipe is completed.

FIG. 2 is an embodiment showing a modification of the sewage saddle joint 1 shown in FIG. The difference from the embodiment shown in FIG. 1 is that the joint body 4 gradually increases in diameter from the saddle 2 side toward the receiving port side, and the inner peripheral surface of the branch pipe 6 inserted into the receiving port 3 has a step. The other points are the same as those in FIG.

[0020]

Since the present invention is configured as described above, it has the following effects.

In the sewage saddle joint according to the first aspect, since the receiving port joins a branch pipe having a diameter larger than the diameter of the saddle side, the sewage main pipe and the branch pipe have the same nominal diameter. Even in the case of joining, a saddle can be joined by making a circular hole in the sewage main pipe. Therefore, when joining the branch pipe to the sewage main pipe, the saddle can be joined simply by deciding the joining position of the joint and drilling a circular hole of a predetermined diameter with a forsaw, making the drilling work simpler and piping construction It can be done easily.

Further, in the sewage saddle joint according to the second aspect, since the joint body portion between the saddle and the receiving port is reduced in diameter toward the saddle side, there is no step between the receiving port and the saddle. It becomes a joint, and the dust in the wastewater is not caught and the drainage pipe with a smooth flow can be formed.

[0023]

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewage saddle joint 2 Saddle 3 Reception port 4 Joint main body 5 Sewage main pipe 6 Branch pipe

Claims (2)

[Claims] 1. A sewage saddle joint, which is a joint for joining attached to a sewage main pipe with a saddle, wherein the other joint is a receiving port for joining a pipe having a diameter larger than the saddle side diameter. 2. The sewage saddle joint according to claim 1, wherein a diameter of the joint body between the saddle and the receiving port is reduced toward the saddle.