JP2015068448A - Connection structure of drain pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniform the use amounts of plural sets of vacuum valves even in a state where a flow rate is small.SOLUTION: A connection structure includes: a drain pipe 5 that is provided with an inner layer pipe 16 formed of a resin material, a foam resin layer 17 provided on an outer peripheral surface 16a of the inner layer pipe 16 and a skin layer 18 provided on an outer peripheral surface 17a of the foam resin layer 17; and a pipe joint 7 that connects the drain pipe 5 and a vertical pipe for drain water. Between the drain pipe 5 and the pipe joint 7, an adapter 6 is arranged, which is provided with a socket 8 to which a tip part 5a of the drain pipe 5 is internally fitted and a spigot 9 inserted into an end part 11a of the pipe joint 7. In the end part 11a of the pipe joint 7, a fastening mechanism 20 fastening the spigot 9 and holding it is included.

Description

  The present invention relates to a drain pipe connection structure.

As a drain pipe that is attached to an air conditioner or the like and causes drain drainage to flow into a drainage pipe, one having a heat insulating structure made of foamed resin is widely used to prevent condensation (for example, Patent Document 1 below).
The drain pipe described in Patent Literature 1 includes an inner layer pipe formed of a hard PVC layer that improves drainage drainage scavenging, a foamed resin layer provided on the outer peripheral surface of the inner layer pipe, and a foamed resin layer. And a vinyl chloride skin layer provided on the outer peripheral surface.

On the other hand, as a drain pipe, a pipe formed of a steel pipe is widely used when it has a large diameter.
Moreover, as a pipe joint for connecting such a steel pipe drain pipe and a drain pipe made of a resin material, a thick rubber packing is arranged on the inner peripheral surface of the end portion, and the thickness of the rubber packing is A device having a tightening mechanism that tightens or relaxes an end portion of a tube inserted by increasing / decreasing the length is used.

  When the drain pipe is directly connected to the pipe joint as described above, the drain pipe does not have rigidity against tightening by the rubber packing, so that the inner hole of the drain pipe is crushed. Therefore, in the past, in order to connect the drain pipe and the PVC pipe in order to connect the drain pipe to the metal pipe joint without deforming the distal end portion thereof, the adapter and the PVC joint made of PVC are widely used. And were used. That is, a method of connecting a drain pipe, an adapter made of vinyl chloride, a vinyl chloride joint, and a vinyl chloride pipe in this order, inserting an end of the vinyl chloride pipe into the pipe joint, and tightening was adopted.

Japanese Patent No. 3699579

However, according to the connection structure of the drain pipe, a large number of members can be used to connect the pipe joint and the drain pipe, although it can be connected to the pipe joint using a member that has been widely used without requiring a new member. Therefore, there is a problem that the connection work of the piping is complicated.
Therefore, the present invention provides a drain pipe connection structure that makes connection work simple and easy.

The present invention relates to a drain pipe comprising an inner layer pipe formed of a resin material, a foamed resin layer provided on the outer peripheral surface of the inner layer pipe, and a skin layer provided on the outer peripheral surface of the foamed resin layer. A pipe joint for connecting the pipe and the drain pipe for drainage, and inserted between the drain pipe and the pipe joint at a receiving port for fitting the end of the drain pipe and an end of the pipe joint. An adapter having an insertion port is provided, and an end portion of the pipe joint is provided with a tightening mechanism for tightening and holding the insertion port.
According to such a drain pipe connection structure, since the drain pipe and the pipe joint can be connected by the adapter, the connection structure becomes simple.

It is preferable that the insertion port of the present invention has a dimension extending outside the end portion of the pipe joint in a state where the end portion is inserted to the insertion position reaching the tightening mechanism of the pipe joint.
According to such a configuration, the tightening mechanism can be easily operated in a state where the insertion port is inserted into the end portion of the pipe joint.

The inner hole of the insertion port of the present invention is formed with a smaller diameter than the inner hole of the drain pipe and is eccentric with respect to the inner hole of the receiving port. The portion is formed linearly in the axial direction, and the difference between the linearly formed part of the inner circumferential surface in the circumferential direction and the inner circumferential surface of the receiving port is the thickness of the drain pipe. It is preferable that
According to such a configuration, when a drain pipe is inserted into the receiving port, the inner peripheral surface of the insertion port is substantially the same as the inner peripheral surface of the drain pipe in a part of the inner peripheral surface formed in the linear shape in the circumferential direction. It will be the same. Therefore, by arranging the inner peripheral surface of the linearly formed outlet to form the bottom surface, the scavenging performance of the drainage flowing through the drain pipe is improved.

  According to the present invention, there is an effect that the connection work between the drain pipe and the pipe joint can be made simple and easy.

It is the schematic which showed the example of application of one Embodiment of the connection structure of the drain pipe of this invention. It is a partial sectional view showing one embodiment of a drain pipe connection structure of the present invention. It is a partial cross section figure which shows the modification of one Embodiment of the connection structure of the drain pipe of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment for implementing a drain pipe connection structure according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic view showing an example in which a drain pipe connection structure 1 according to an embodiment of the present invention is applied between an air conditioner 2 and a drainage pipe 3.
As shown in FIG. 1, the drain pipe connection structure 1 is directed to drainage drainage discharged from an air conditioner 2 fixed to a ceiling T, for example, toward a drainage drainage pipe 3 arranged outside an inner wall 4 of a building. It is arranged so that it can flow out.

The drain pipe connection structure 1 includes a drain pipe 5, an adapter 6, and a pipe joint 7. As shown in FIG. 2, the end 5 a of the drain pipe 5 is connected to the pipe joint 7 through the adapter 6. I am letting.
The drain pipe 5 is provided on an inner layer pipe 16 mainly formed of a hard PVC resin, a foamed resin layer 17 provided in a cylindrical shape on the outer peripheral surface 16 a of the inner layer pipe 16, and an outer peripheral surface 17 a of the foamed resin layer 17. And a skin layer 18.

The adapter 6 includes a receiving port 8 into which the distal end portion 5 a of the drain pipe 5 is fitted, and a cylindrical insertion port 9 that is provided continuously with the receiving port 8 and is inserted into and fixed to the pipe joint 7.
The insertion port 9 is formed to have a length extending a predetermined dimension in the direction of the axis L1 toward the outside of the reception port 11a when inserted into the reception port (end) 11a of the pipe joint 7.

The pipe joint 7 has a main pipe 10 that connects the upper drainage pipe 3a and the lower drainage pipe 3b, and an insertion port 9 of the adapter 6 to fit the drainage from the drain pipe 5 into the drainage pipe. A branch pipe 11 to be joined in the pipe 3 is provided.
Each receptacle (end) 10a, 11a formed in the main pipe 10 and the branch pipe 11 is fastened with a thick rubber packing 12 with a push ring 15 using a coupling member C such as a bolt 13 and a nut 14 to A tightening mechanism 20 is provided that presses the end portions of the fitted upper and lower drainage pipes 3a and 3b and the insertion opening 9 of the adapter 6 with the rubber packing 12, respectively.

  Specifically, the receiving port 11a is provided with a flange 26 formed with a through hole 25 through which the bolt 13 is inserted parallel to the direction of the axis L1. A recess 28 having an inclined surface 27 that forms a tapered shape is formed on the inner peripheral surface of the receiving port 11a in which the flange 26 is formed.

On the side facing the end face 26s of the flange 26, there is disposed a push ring 15 having the receiving port 11a and the inner diameter r1 in common and the flange 26 and the outer diameter r2 in common. A recess 29 is formed in the inner peripheral surface of the push ring 15 facing the recess 28 of the receiving port 11a, and a ring-shaped rubber having a predetermined pressure in the annular space formed by these recesses 28, 29. Packing 12 is arranged. A through hole 30 is formed in the push ring 15 at a position opposite to the through hole 25 of the flange, and the push ring 15 is inserted into the through holes 25 and 30 and screwed into the nut 14 so that the push ring 15 receives the receiving hole 11a. It is connected with.
The tightening mechanism 20 is constituted by the receiving port 11a, the rubber packing 12, the push ring 15, the bolt 13 and the nut 14 thus configured.
In addition, the same fastening mechanism 20 as the receptacle 11a of the branch pipe 11 is provided also in the receptacles 10a and 10a of the main pipe 10.

Next, a method for forming the drain pipe connection structure 1 will be described.
First, an adhesive is applied to the outer peripheral surface 5F of the distal end portion 5a of the drain pipe 5, and is inserted into the receiving port 8 of the adapter 6 to be fixed. On the other hand, a pipe joint 7 is fixed between the upper drainage pipe 3a and the lower drainage pipe 3b. After the distal end portion 5a of the drain pipe 5 is fixed to the adapter 6, the nut 14 is loosened in advance, and the insertion port 9 of the adapter 6 is inserted into the branch pipe 11 that has been separated from the receiving port 11a by the push ring 15.

  Then, the nut 14 is screwed in the tightening direction, and the push wheel 15 is brought close to the receiving port 11a. Then, the rubber packing 12 is pressed in the direction of the axis L1 to increase the thickness dimension, and the outer peripheral surface 9a of the insertion slot 9 is gradually pressed and tightened, so that the adapter 6 is firmly and watertight to the receiving port 11a of the branch pipe 11. Fixed. In this way, the connection of the drain pipe 5 is completed. Note that the connection between the receiving port 10 a formed in the main pipe 10 and the drainage pipes 3 a and 3 b is performed in the same manner as the connection between the branch pipe 11 and the insertion port 9 of the adapter 6.

  As described above, in the drain pipe connection structure 1 of the present embodiment, the drain pipe 5 is fixed to the receiving port 8 of the adapter 6, and the insertion port 9 of the adapter 6 is fixed to the branch pipe 11 of the pipe joint 7 and tightened. Therefore, the drain pipe connecting structure in which the drain pipe 5 and the pipe joint 7 are connected can be formed extremely simply and easily.

Moreover, even if the pipe joint 7 that compresses the rubber packing 12 and fixes the internally fitted pipe end portion is used, the drain pipe 5 and the drainage pipe 3 are appropriately formed without crushing the inner hole H3 of the drain pipe 5. Can be connected to each other.
Furthermore, when the insertion port 9 is inserted into the receiving port 11a of the branch pipe 11 and is tightened by the tightening mechanism 20, the connecting member C is not shown because it has a dimension extending outside the receiving port 11a. The effect that it is easy to operate using a tool is acquired.

Next, a modification of the above-described embodiment will be described. In this modification, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.
In the present embodiment, the inner hole H <b> 1 of the insertion port 9 is formed with a diameter smaller than that of the inner hole H <b> 3 of the drain pipe 5.
Further, the axis L2 of the inner hole H2 of the receiving port 8 is eccentric with respect to the axis L1 of the inner hole H1 of the insertion port 9, and a circumferential portion 33 of the inner peripheral surface of the insertion port 9 is in the direction of the axis L1. The difference between the linearly formed inner circumferential surface 33 of the inner circumferential surface and the inner circumferential surface 31 of the receiving port 8 located on the extension is equal to the thickness of the drain pipe 5. It is formed to become.

Therefore, when the adapter 6 is inserted into the branch pipe 11 and fixed, a part 33 of the inner peripheral surface of the insertion port 9 is arranged so as to form the bottom surface 32 of the inner hole H1, so that the adapter 6 is removed from the drain pipe 5. A substantially smooth bottom surface 32 is formed in the direction of the axis L1 so as not to form a reverse step that can prevent the smooth flow of drainage over the inner hole H1.
Therefore, by forming the adapter 6 used in the drain pipe connection structure 1 in this manner, the scavenging property between the drain pipe 5 and the adapter 6 is improved, and the drain pipe 5 accumulates drainage. This is advantageous in that possible inconveniences can be avoided.

DESCRIPTION OF SYMBOLS 1 Connection structure of drain pipe 3 Drainage pipe 5 Drain pipe 5a Tip part 6 Adapter 7 Pipe joint 8 Receptacle 9 Insert 10a Receptacle (end of pipe joint)
11a Receiving port (end of pipe fitting)
20 Tightening mechanism 31 Inner peripheral surface 33 of receiving port Part of inner peripheral surface H1 of insertion port Inner hole H2 Inner hole L1 of receiving port Axis L2 Axis

Claims (3)

A drain pipe comprising an inner layer pipe formed of a resin material, a foamed resin layer provided on the outer peripheral surface of the inner layer pipe, and a skin layer provided on the outer peripheral surface of the foamed resin layer, the drain pipe and drainage A pipe joint that connects the pipe and the pipe,
Between the drain pipe and the pipe joint, an adapter having a receiving port for fitting the front end of the drain pipe and an insertion port inserted into the end of the pipe joint is arranged,
A drain pipe connection structure, wherein an end portion of the pipe joint is provided with a tightening mechanism for tightening and holding the insertion port.   The insertion port has a dimension that extends outside an end of the pipe joint in a state in which the end is inserted to an insertion position that reaches the tightening mechanism of the pipe joint. The drain pipe connection structure according to 1.   The inner hole of the insertion port is formed with a smaller diameter than the inner hole of the drain pipe and is eccentric with respect to the inner hole of the receiving port, and a part of the circumferential direction of the inner peripheral surface of the insertion port is an axis line The drain pipe is formed such that a difference between a part of the inner circumferential surface formed in a straight line in the circumferential direction and the inner circumferential surface of the receiving port is the thickness of the drain pipe. The drain pipe connection structure according to claim 1 or 2, wherein:

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