JPH061982U - Double layer pipe fittings - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pipe joint for a two-layer pipe in which pipe construction can be easily performed and the pipe can be easily modified after the pipe construction. [Structure] A ventilation path is formed between the inner joint 1 and the outer joint 2, and both are arranged so as to be movable in the axial direction via a spacer member 10 interposed in the ventilation path. Then, the end portion of the inner pipe 1a is inserted into and connected to the expanded diameter receiving port 11 provided at one end portion of the inner joint 1, and the expanded diameter receiving port 21 provided at one end portion of the outer joint 2 is provided with Insert the end, and expand the diameter 2
The packing 3 is pressed by the pressing flange 4 against the inclined surface 22 provided in the front end opening of the outer peripheral surface 1, and the packing 3 is pressed against and connected to the outer peripheral surface of the end of the outer tube 2a. [Effect] Piping can be done easily and the piping can be easily modified after the work.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inner pipe having a drainage path inside the pipe, and a pipe joint for connecting a two-layer pipe in which the outer peripheral side of the inner pipe is covered with an outer pipe and a ventilation path is provided between the inner pipe and the outer pipe. .

[0002]

[Prior art]

 In recent years, in high-rise housing such as apartments and condominiums, drainage equipment A such as toilets and bathtubs on each floor as shown in the partial sectional view in FIG. A drainage system has been proposed in which the upper and lower joints are connected to the ends of the upstream and downstream two-layer pipes D, respectively.

The double-layer pipe D of this drainage system is one in which an outer pipe 2a covers the outer peripheral side of an inner pipe 1a having a drainage path inside and a ventilation path is provided between the inner pipe 1a and the outer pipe 2a. Therefore, the upper end of the ventilation path is open to the atmosphere. Further, the collecting pipe C is formed by covering the outer peripheral side of the inner collecting pipe C1 with an outer collecting pipe C2 and providing a ventilation path between the inner and outer collecting pipes C1 and C2. It is always maintained at atmospheric pressure through the ventilation path. Therefore, the drainage flowing from the horizontal pipe B into the collecting pipe C swirls along the inner peripheral wall of the inner collecting pipe C1 and smoothly falls into the inner pipe 1a on the downstream side.

[0004]

[Problems to be solved by the device]

 By the way, in the conventional connection of the two-layer pipes, the inner pipe 1a and the outer pipe 2a on the upstream side and the downstream side were joined using an adhesive, so that the connecting work was troublesome and the pipes after the construction were completed. There was a problem that could not be fixed.

The present invention has solved the above problems, and provides a pipe joint for a two-layer pipe in which the pipe can be easily installed and the pipe can be easily corrected after the installation.

[0006]

Means for Solving the Problems The present invention provides a two-layer structure in which an inner pipe having a drainage path inside the pipe and an outer pipe covering the outer peripheral side of the inner pipe to provide a ventilation path between the inner pipe and the outer pipe. A pipe joint for connecting pipes, which comprises an inner joint and an outer joint covering an outer peripheral side of the inner joint. A ventilation path is formed between the inner joint and the outer joint, and both are arranged so as to be movable in the axial direction through a spacer member interposed in the ventilation path. Then, insert the end of the inner pipe into the expanded diameter receiving port provided at one end of the inner joint for connection, and insert the end of the outer pipe into the expanded diameter receiving port provided at one end of the outer joint. It is characterized in that the packing is pressed against the inclined surface provided at the tip end opening portion of the expanded diameter receiving port by a flange so that the packing is brought into pressure contact with the outer peripheral surface of the end portion of the outer tube.

[0007]

[Action]

 When the end of the inner pipe is inserted into the expanded diameter receiving port of the inner joint, the inner pipe and the inner joint are connected and a drainage path is formed in the pipe. Also, when the outer tube is inserted into the expanded diameter receiving port of the outer joint and the packing is pressed against the inclined surface provided at the tip opening of the receiving port with the flange, the packing comes into pressure contact with the outer peripheral surface of the end of the outer tube. Then, the outer pipe and the outer joint are connected, and a ventilation path is formed between the inner peripheral surface of the pipe and the outer peripheral surface of the inner pipe and the inner joint.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a longitudinal sectional view showing an embodiment of the present invention, in which 1 is an inner joint made of a synthetic resin such as vinyl chloride resin or polyethylene, 2 is an outer joint made of a metal such as cast iron, and 3 is Packing 4 is a holding flange, and D is a double-layer pipe.

The double-layer pipe D is a pipe in which an outer pipe 2a covers an outer peripheral side of an inner pipe 1a having a drainage passage inside the pipe, and a ventilation passage is provided between the inner pipe 1a and the outer pipe 2a. The pipe 1a and the outer pipe 2a are arranged substantially concentrically via a band-shaped spacer member 20.

The pipe joint of the present invention connects the upstream side and the downstream side of the two-layer pipe D, and the outer joint side of the inner joint 1 is covered with the outer joint 2. An air passage is formed between the inner joint 1 and the outer joint 2, and a band-shaped spacer member 10 interposed in the air passage makes the inner joint 1 and the outer joint 2 substantially concentric. It is set up. Further, the inner joint 1 and the outer joint 2 can be moved relative to each other in the axial direction via the spacer member 10.

The inner joint 1 is curved with a desired curvature, and an enlarged diameter receiving port 11 is provided at one end thereof, and a straight tubular inlet 12 is provided at the other end. On the other hand, the outer joint 2 is curved with a curvature substantially similar to that of the inner joint 1, an enlarged diameter receiving port 21 is provided at one end thereof, and a straight tubular inlet 24 is provided at the other end. Further, an inclined surface 22 is formed at the tip opening of the receiving port 21, and a flange 23 having a bolt insertion hole is provided on the outer peripheral side thereof.

When connecting the two-layer pipe D on the upstream side to this pipe joint, the lower end portion of the inner pipe 1 a on the upstream side is inserted into the diameter expansion receiving port 11 of the inner joint 1, and the diameter expansion receiving member of the outer joint 2 is inserted. The lower end of the upstream outer tube 2a is inserted into the mouth 21. Therefore, the packing 3 that has been externally inserted in the outer tube 2a is interposed between the inclined surface 22 provided at the front end opening portion of the enlarged diameter receiving port 21 and the pressing flange 4, and the pressing flange 4 and the receiving port 21 are The bolt 5 is inserted into the flange 23 provided on the outer peripheral side and the nut 6 is screwed. Then, the packing 3 pressed between the inclined surface 22 and the pressing flange 4 is brought into pressure contact with the outer peripheral surface of the end portion of the outer tube 2a, and the watertightness is secured.

Next, the downstream two-layer pipe D is connected to this pipe joint. At this time, the inlet 12 of the inner joint 1 is inserted into and connected to the expanded diameter receiving opening provided at the upper end of the inner pipe 1a on the downstream side, and the outlet 24 of the outer joint 2 is connected on the downstream side in the same manner as described above. The outer tube 2a is connected by inserting it into the expanded diameter receiving port provided at the upper end portion. Thus, the upstream side and the downstream side of the double-layer pipe D are connected by the pipe joint of the present invention.

Although FIG. 1 illustrates a curved pipe joint in which the inclination angle θ of the axes of the inner joint 1 and the outer joint 2 is 45 degrees, the inclination angle θ may be any angle such as 15 degrees and 30 degrees. Alternatively, the inclination angle θ may be set to zero degree to form a straight line.

[0015]

[Effect of device]

 As described in detail above, according to the present invention, the end portion of the inner pipe is inserted into the expanded-diameter receiving opening of the inner joint, and the outer pipe is inserted into the expanded-diameter receiving opening of the outer joint, and the tip end opening of the receiving opening is provided. A double-layer pipe can be connected simply by pressing the packing against the inclined surface with a pressing flange. Further, in the pipe joint of the present invention, the inner joint and the outer joint can be moved relative to each other in the axial direction via the spacer member. Can be projected from the end of the outer joint. Therefore, the two-layer pipe can be easily connected, and the pipe position and angle can be easily corrected after the construction.

[Brief description of drawings]

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

FIG. 2 is a partial cross-sectional view schematically showing a two-layer pipe drainage system.

[Explanation of symbols]

 1 Inner Joint 2 Outer Joint 3 Packing 4 Presser Nut 11 Expanding Receiving Port 21 Expanding Receiving Port 22 Slope 1a Inner Pipe 2a Outer Pipe

Claims (1)

[Scope of utility model registration request] 1. An inner pipe (1a) having a drainage path inside the pipe,
A pipe joint for connecting a two-layer pipe in which the outer peripheral side of the inner pipe (1a) is covered with an outer pipe (2a) and a ventilation path is provided between the inner pipe (1a) and the outer pipe (2a). The inner joint (1) and the outer joint (2) covering the outer peripheral side of the inner joint (1),
An air passage is formed between the inner joint (1) and the outer joint (2), and a spacer member (10) interposed in the air passage is arranged so as to be movable in the axial direction, The inner pipe (1) is attached to the enlarged diameter receiving port (11) provided at one end of the inner joint (1).
The end portion of a) is inserted and connected, and the end portion of the outer pipe (2a) is inserted into the enlarged diameter receiving opening (21) provided at one end portion of the outer joint (2). 21) the packing (3) is pressed against the inclined surface (22) provided at the tip opening of the outer tube (2) by pressing the packing (3) against the outer peripheral surface of the end of the outer tube (2a). A two-layer pipe fitting characterized by.