JPS624603Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an exchange joint for connecting an inlet/outlet pipe of a drainage basin and a sewer pipe.

Sewage drains constructed on site are made of concrete, and their inlet and outlet pipes are generally ceramic pipes, so they cannot be directly connected to sewer pipes, which are generally made of polyvinyl chloride. Conventionally, in such cases,
For example, as shown in Fig. 3, one end 5 of a pipe 3a having substantially the same outer and inner diameters of the sewer pipe 1 is enlarged and fitted into the inlet/outlet pipe 2 protruding from the square 8, and mortar 7 is inserted into the gap. After filling, the inlet/outlet pipe 2 and the pipe 3a are connected, and then the pipe 3a and the sewer pipe 1 are connected by an exchange joint 3b with an O-ring 4 housed in the inner annular groove at both ends, and then the joint is connected. In order to eliminate the step part, the sewer pipe 1 was connected to the outlet/outlet pipe 2 by housing a short sleeve pipe 6 inside the central part of the joint 3b.

However, such a connection method requires the preparation of a large number of members, and the construction is complicated. Therefore, it is an object of the present invention to provide an exchange joint that can easily connect an inlet/outlet pipe and a sewage pipe using as few members as possible.

The present invention is an exchange joint for connecting an inlet/outlet pipe of a drainage basin and a sewage pipe, which has an inner diameter corresponding to the outer diameter of the sewage pipe, and has an O-ring adjacent to one end thereof. a fitting inner annular groove, the other end having an enlarged inner diameter substantially larger than the outer diameter of the inlet/outlet pipe, and inserting the drain pipe into the interior of one end of the exchange fitting to attach an O-ring. Connect the fitting around the sewer pipe through the fitting, accommodate the inlet/outlet pipe in the enlarged part at the other end of the fitting, fill mortar between the inlet/outlet pipe and the enlarged part, and connect the fitting and the outlet/inlet pipe. To provide an interchange joint for a sewer pipe in which a short pipe having substantially the same outer diameter and inner diameter as the sewer pipe is arranged inside the joint center part to eliminate a stepped part of the joint.

The present invention will be described in detail below with reference to the drawings.
FIG. 1 is a longitudinal cross-sectional view of the exchange joint 3 of the present invention. The joint 3 is made of plastic such as polyvinyl chloride and is generally tubular. At the end on the side of the sewer pipe 1 to be connected, an annular groove is provided a little inside from the edge, and an O-ring 4 is fitted into the groove. The end of the joint 3 on the inlet/outlet pipe 2 side is an enlarged part 5
The inlet/outlet pipe 2 is accommodated with a gap left inside. The inner diameter of the joint 3 other than the enlarged part 5 is approximately equal to the outer diameter of the sewer pipe 1, and the inner diameter of the enlarged part 5 is of such a size that even when the inlet/outlet pipe 2 is accommodated, a gap still exists. Note that it is desirable that the inner circumferential surface of the enlarged portion 5 be a sanded surface 9.

A method of connecting the inlet/outlet pipe 2 and the sewer pipe 1 using the coupling 3 of the present invention is shown in FIG. First, the joint 3 is fitted around the sewer pipe 1 from the end with the O-ring 4, and is retreated to the position indicated by the dotted line. Next, between the connecting end of the sewer pipe 1 and the connecting end of the inlet/outlet pipe 2 of the box 8, place a short pipe 6 that is approximately equal to the outer diameter and inner diameter of the sewer pipe 1, and push the joint 3 in the direction of the arrow to open the enlarged part. 5 around the inlet/outlet pipe 2. Thereafter, the gap between the outer periphery of the inlet/outlet pipe 2 and the inner periphery of the enlarged portion 5 is filled with mortar 7 to complete the connection.

As described above, the use of the reciprocal joint of the present invention requires fewer members than the conventional reciprocating joint, and the construction is simple and easy.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the exchange joint of the present invention, Figure 2 is a schematic diagram of a connection constructed using the joint, and Figure 3 is a schematic diagram of a connection using a conventional exchange joint. . 1 is a sewer pipe, 2 is an inlet/outlet pipe of a cell, 3 is an exchange joint, 4 is an O-ring, 5 is an enlarged part, 6 is a short pipe, 7 is a mortar, and 8 is a cell.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An exchange joint for connecting the inlet/outlet pipe of a drainage basin and a sewage pipe, which has an inner diameter equivalent to the outer diameter of the sewage pipe and is adjacent to one end thereof. Then O
- an inner annular groove in which a ring is fitted, the other end having an enlarged inner diameter substantially larger than the outer diameter of the inlet/outlet pipe, into which the drain pipe is inserted; Connect the fitting around the sewer pipe via an O-ring, accommodate the inlet/outlet pipe in the enlarged part at the other end of the fitting, and fill mortar between the inlet/outlet pipe and the enlarged part to connect the fitting and the outlet/inlet. An exchange joint for a sewer pipe, characterized in that a short pipe having substantially the same outside diameter and inside diameter as the sewer pipe is arranged inside the central part of the joint to eliminate a stepped part of the joint. (2) The exchange joint according to claim 1 of the utility model registration claim, which is formed by sanding the inner surface of the joint expansion part.