JPH1038157A - Coupling for connecting polyvinyl chloride pipe and ceramic pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exclusive coupling for connecting a polyvinyl chloride pipe and a ceramic pipe to each other by a pipe bottom connecting method. SOLUTION: A first connecting part 3 to be connected to a polyvinyl chloride pipe 5A is provided on one side of a polyvinyl chloride-made coupling 1, a second connecting part 6 to be connected to a ceramic pipe 2 is provided on the other side, and the coupling 1 provided with a step 11 equal to the deviation (d) between center axes M, N of respective pipes, to be generated when respective pipe bottoms of the pipe 5A and the pipe 2 are matched to the pipe top side between them is constituted. Therefore, polyvinyl chloride pipe and the ceramic pipe can be connected to each other by a pipe bottom joining method only by inserting the pipe 5A and the pipe 2 into the coupling 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting a PVC pipe and a ceramic pipe of a sewage system.

[0002]

2. Description of the Related Art As is well known, a sewage pipe is made of a ceramic pipe, a reinforced concrete pipe (a fume pipe), a PVC pipe, or the like. Combine the materials and mold, around 1000 ° C, or 1200-130
A ceramic pipe fired at a high temperature of 0 ° C.
The PVC pipe for a sewer pipe is formed by molding a hard vinyl chloride resin with a pipe extruder.

[0003] On the other hand, a joint is used to connect the sewer pipe, but when this joint is incomplete, a large amount of infiltration water such as groundwater infiltrates into the pipe, resulting in insufficient flow capacity of the pipe and additional processing of the pump. Pipe joints need to be watertight and durable because of the potential for field degradation.

In the case of a porcelain pipe or a fume pipe, there are generally three types of joints, a socket joint, a color joint (also referred to as a coupling) and a butt joint, depending on the shape of the connecting portion of the pipe. Is used.

In order to connect the sewer pipes, connection methods such as pipe center connection and pipe bottom connection are used. Among these, the pipe bottom connection method is to connect the bottoms of connecting pipes in a manhole. It is used for the method.

By the way, ceramic pipes have been used for sewage equipment for a long time. Recently, PVC pipes have been adopted for sewage pipes. Became used.

[0007] Therefore, it is necessary to connect a ceramic tube to a PVC manhole or the like, and at a construction site, the appearance of a dedicated joint is required.

First, an example of a PVC manhole will be described. Referring to FIG. 5, what is described in Japanese Utility Model Laid-Open No. 5-87036 will be described. This PVC manhole 1A is buried at a depth of about 1 m, for example, under a relatively narrow public road having a narrow road width. Sewage main is 15
0 mmφ, and the cleaning tube is 300 mmφ.

The manhole body 2A is provided with a cleaning port pipe outlet 3A upward, a rubber ring receptacle 4A for the upstream sewage main pipe, and a downstream port 5A for a sewage main pipe, respectively. .

A cleaning port pipe 8A having a rubber ring receiving port 7A on the lower end side is connected to the cleaning port pipe 3A. A closed inner lid 9A is attached to the upper end of the cleaning port tube 8A, and the inner lid 9A is further covered with a protective iron lid 10A.

The protective iron cover 10A comprises a main body 11A formed of a conical body which is expanded downward, and an iron cover 12A provided on the upper surface of the main body 11A so as to be openable and closable, and a lower end of the main body 11A is provided with a flange. 13A is extended, and the flange 13A is mounted on a donut-shaped underground protection plate 14A to support the protective iron cover 10A.

Considering the case where the above PVC manhole 1A is connected to an existing or new ceramic pipe (not shown), for example, the downstream side sewer main port 5A is connected to the ceramic pipe. In order to achieve this, it is assumed that, for example, the color joint 15A for a ceramic tube shown in FIG. 5 is applied in consideration of watertightness and durability as described above.

The color joint 15A has a main body 16A.
Is made of PP, and a stopper -17A is provided at the center of the inner circumference in the axial direction.
Are provided on the both sides, and the both sides are formed in a receiving port shape, and rubber rings 18A, 18A are fixed.

Therefore, when the downstream side sewer main port 5A and the ceramic pipe are inserted from both sides of the collar joint 15A and brought into contact with the stopper 17A, an appropriate insertion amount can be obtained. Since the lip is attached to 18A, it is in a watertightly sealed state.

[0015]

However, such a color joint 15A has a problem that the manhole does not conform to the pipe bottom joining method of fitting the bottom of the connecting pipe.

That is, although recent ceramic pipes are called ceramic pipes and have become thin, the wall thickness is still 13 mm when the nominal diameter is 150 mmφ, while the wall thickness of PVC pipes for sewer pipes is 5mm for nominal diameter 150mmφ
It has become.

Therefore, both are connected to the color joint 15 described above.
If the connection is made by A, there is a problem that a step is formed at the bottom of the tube, and the tube is not compatible with the above-mentioned tube bottom joining method.

In addition, the color joint 15A has a problem that the socket-like socket part of the ceramic tube cannot be connected to the PVC pipe as it is.

That is, when the ceramic pipe is laid, the socket portion is laid toward the upstream, but the spout for the sewage main pipe on the downstream side of the small-diameter PVC manhole 1A is provided upstream of the ceramic pipe. When connecting 5A, this color joint 15A
There is a problem that can not be used

In order to connect the ceramic pipe and the PVC pipe, a compression joint method used to connect the ceramic pipes (a rubber ring or a polyurethane resin packing is fixed to the inner periphery of the socket part of the ceramic pipe, and this socket part PVC pipes, which are based on a semi-standardized dissimilar pipe joining method, which does not use a connection method that pushes another pottery pipe to be inserted and connected with a pusher or the like to improve water stoppage. After applying an adhesive to the surface, sanding it with dry sand, sanding it, and then filling and joining mortar between the ceramic pipe and the sanded PVC pipe. However, there is a problem that such a connection method is a troublesome operation.

Furthermore, even in this case, there is a problem that the ceramic pipe and the PVC pipe are not suitable for the pipe bottom joining method because there is a slight difference in dimensions of respective inner diameters as nominal diameters.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to meet the above-mentioned demands at recent construction sites.

[0023]

SUMMARY OF THE INVENTION To achieve the above object, the gist of the present invention is as follows. 1) A PVC joint for connecting a PVC pipe and a ceramic pipe by a pipe bottom joining method. Forming a first connection portion connected to the PVC pipe on the side,
A second connecting portion is formed on the other side for connecting to the ceramic tube, and when the bottoms of the PVC tube and the ceramic tube are aligned with the top of the tube between the first and second connecting portions. A PVC pipe using a pipe bottom joining method, characterized in that a step substantially equal to the deviation of each center line between the PVC pipe and the ceramic pipe is formed so as to have a predetermined step amount from the bottom of the pipe to the top of the pipe.・ In the joint for ceramic tube connection,
2) In a PVC joint for connecting a PVC pipe and a ceramic pipe by a pipe bottom joining method, a connection part for connecting to the PVC pipe is formed on one side of the joint, and a socket part of the ceramic pipe is formed on the other side. A contact portion that contacts the stopper is formed, a ring portion is formed between the connection portion and the contact portion, and the pipe bottoms of the PVC pipe and the ceramic pipe are formed on the top of the ring section. Forming a step substantially equal to the deviation of each center line between the PVC pipe and the ceramic pipe, which occurs when the pipes are made to coincide with each other, and interposing a seal material between the socket part and the outer periphery of the joint. And 3) a PVC joint for connecting a PVC pipe and a ceramic pipe by a pipe bottom joining method, wherein a PVC pipe and a ceramic pipe are connected to one side of the joint. By forming a connecting portion to connect, and by forming a contact portion that contacts the downstream end of the pottery tube on the other side, A ring portion is formed between the connecting portion and the abutting portion, and a PVC pipe and a ceramic pipe are formed when the pipe bottoms of the PVC pipe and the ceramic pipe are matched with each other on the pipe top side of the ring section. Forming a step substantially equal to the displacement of each center line of the above, and slidably fitting a single cylindrical coupling extending over the outer periphery of the downstream side of the ceramic tube and the outer periphery of the joint. And 4) a PVC joint for connecting a PVC pipe and a ceramic pipe by a pipe bottom joining method, wherein a connecting portion for connecting to the PVC pipe is provided on one side of the joint. At the same time, a receiving port was formed on the other side to abut the downstream end of the pottery pipe, and the pipe bottom of the PVC pipe and the pottery pipe coincided with the pipe top side of the connecting part adjacent to the contact part. A step which is substantially equal to the deviation of the center line between the PVC pipe and the ceramic pipe sometimes occurs, and a gap is formed between the receiving port and the downstream side of the ceramic pipe. 5) PVC pipe / ceramic pipe connection joint using pipe bottom joint method characterized by the use of a pipe material, and 5) PVC pipe connection part of PVC small diameter square or PVC manhole 5. The joint for connecting a PVC pipe and a ceramic pipe according to claim 1.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to embodiments shown in the accompanying drawings. FIG. 1 is a cross-sectional view of a first embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part of FIG.
FIG. 4 is a cross-sectional view of the second embodiment, and FIG. 4 is a cross-sectional view of the third embodiment.
This is convenient for a joint for connecting different kinds of pipes used for connecting a PVC manhole and a ceramic pipe. Of course, the present invention is also applicable when connecting a PVC pipe and a ceramic pipe in other sewage facilities.

First, a PVC pipe / ceramic pipe connection joint 1 according to the first embodiment will be described. In FIGS. 1 and 2, a PVC pipe using the joint 1, that is, the downstream side sewer main port 5A (hereinafter also referred to as the downstream side port 5A) shown in FIG. Nominal diameter (generally refers to the inner diameter)
A joint having a diameter of 200 mm is shown as an example, and the joint 1 is a PVC injection molded product (of course, another olefin resin may be used).

Now, a downstream port 5A shown in FIG.
A receiving port 3 to be S-joined is provided, that is, a connecting portion (also referred to as a first connecting portion) is formed. On the downstream side, a rubber ring fitting groove 4 is formed on the outer periphery thereof. A spigot 6 (also referred to as a second connection portion) into which the socket portion 5 is fitted is provided, and an end of the spigot 6 is a contact portion that comes into contact with a stopper of the socket portion 5.

The outside diameter of the spigot 6 is increased by about 15 mm from the outside diameter of the socket 3 to form a thick wall, and the socket portion 5 of the ceramic tube 2 is compressed with a rubber ring 7. A method similar to the joint method can be applied.

Since the spigot 6 is thicker than the spout 3, the sponge 10, 10,... Having an opening at the downstream end 8 of the spigot 6 and having four ribs 9, 9,. Is formed.

Here, in order to apply this joint 1 to the pipe bottom joining method, the following structure is adopted.

That is, since a general PVC pipe is formed by an extruder with an outer diameter regulation, the inner diameter as a nominal diameter has a slight tolerance (for example, 2 mm at a nominal diameter of 200 mmφ).

The spout 5A for the sewage main pipe on the downstream side in FIG. 5 is an injection-molded product, and the spout 5A has an outer diameter substantially equal to the outer diameter of a general PVC pipe having the same diameter. Of course, this outlet 5
This joint 1 can be applied even if A has an outer diameter different from the outer diameter of a general PVC pipe having the same diameter.

On the other hand, in the case of a thick porcelain tube, there is a slight tolerance in the inner diameter itself (for example, 5 mm at a nominal diameter of 200 mmφ), and in the case of a thin porcelain tube, for example, a nominal diameter of 200 m
It has a tolerance of 3 mm in mφ.

Therefore, the tolerance between the PVC pipe and the porcelain pipe is different. Therefore, in the present invention, this is adjusted by the joint 1 and applied to the pipe bottom joining method.

For this reason, the center line of the inner diameter of the socket 3 of the joint 1 coincides with the center line M of the inner diameter of the downstream port 5A to be inserted. Make up.

On the other hand, the center line of the inner diameter of the spigot 6 of the joint 1 is
Since the center line N of the inner diameter of the pottery tube 2 is made coincident with the center line N, the spigot 6 of the joint 1 having the center line N is formed.

Therefore, when the pipe bottom of the downstream side port 5A and the pipe bottom of the ceramic tube 2 are made to coincide with each other, a deviation d occurs between the center lines M and N. A step 11 is formed in the thick portion on the top side of the tube 6. The step 11 has a length of about 10 mm in the axial direction at the top of the tube and is zero at the bottom of the tube.

That is, between the socket 3 of the joint 1 and the abutting portion abutting against the stopper of the socket portion 4, a ring portion (a part of the spigot 6 corresponds to The step 11 is formed at the top of the tube of the ring portion.

As a result, the downstream port 5A and the ceramic tube 2 are
When inserted into the joint 1, the joint 1 can be adapted to the tube bottom joining method, and the axial length of the joint 1 can be made as small as possible (for example, 145 mm).

The step 11 forms an inclined surface over the entire inner periphery of the step 11 as shown in FIG. 1 to make the flow smooth. This was easily possible because of the PVC joint 1. Note that a general PVC pipe may be connected instead of the downstream port 5A.

Next, a PVC pipe / porcelain pipe joint 12 according to a second embodiment of the present invention will be described.

Although the parts common to the joint 1 described with reference to FIG. 1 and the like are omitted, in FIG. 3, the joint 12 is configured as a color joint type in the general pipe joint.

That is, a general PVC pipe 13 is inserted on the downstream side of the joint 12 where
A receiving port 14 to be joined is provided, and an abutting portion 15 is provided at an upstream end with which the downstream end of the ceramic tube 2 abuts. The outer diameter of the joint 12 matches the outer diameter of the ceramic tube 2. A single cylindrical coupling 16 that slides on the ceramic tube 2 and the joint 12 is provided.

Therefore, the coupling 16 is connected to the joint 12.
Then, the ceramic tube 2 is inserted into the coupling 16 to connect the joint 12 to the ceramic tube 2. Alternatively, the coupling 16 is fitted over the pottery tube 2 and the coupling 16 is slid in the direction of the arrow so as to pass over the joint 12 and the pottery tube 2 in the same manner as a so-called color joint to connect the two. .

On the outer periphery of the joint 12, a positioning flange 17 is provided substantially at the center in the axial direction to constitute a stopper for the coupling 16, so that the joint 12 and the ceramic tube 2 are formed.
And the external fitting amount are made substantially the same.

The joint 12 is a PVC injection-molded product, and the coupling 16 is made of synthetic rubber or a soft synthetic resin, PE or PP, and its inner diameter is equal to or slightly smaller than the outer diameter of the joint 12 or the ceramic tube 2. Small diameter.

Here, in order to apply the joint 12 to the pipe bottom joining method, the following structure is adopted.

That is, since the center line of the inner diameter of the receiving port 14 of the joint 12 coincides with the center line M of the inner diameter of the PVC pipe 13 to be inserted, the receiving port 14 of the joint 12 is constructed around this center line M. doing.

On the other hand, the center line of the inner diameter of the contact portion 5 of the joint 12 is aligned with the center line N of the inner diameter of the pottery tube 2 to be contacted.

Therefore, when the bottom of the PVC pipe 13 and the bottom of the ceramic pipe 2 are made to coincide with each other, the center lines M and N are shifted from each other by d.
Therefore, with this deviation d, the receiving stopper -1
A step 20 is formed in the thick portion on the tube top side of the ring portion 19 formed between the contact portion 8 and the contact portion 15.

As a result, when the PVC pipe 13 corresponding to the spigot 5A shown in FIG. 5 and the ceramic pipe 2 are respectively inserted into the joint 12, connection can be made by the pipe bottom joining method, and the joint 12
Can be made as small as possible (eg, 100 mm).

The PVC pipe 13 may be connected to the rubber ring receiving port 4A shown in FIG. 5, or may be connected to the downstream port 5A as described above instead of the PVC pipe 13. .

Next, a description will be given of a PVC pipe / porcelain pipe joint 21 according to a third embodiment of the present invention.

Although the common parts with the joint 1 or 12 already described are omitted, in FIG. 4, the PVC rubber ring socket 4A shown in FIG. Outlet 22 is provided. A rubber ring 23 is fitted into the PVC rubber ring receiving port 4A.

On the other hand, a receiving port 24 into which the downstream side of the ceramic tube 2 is inserted is provided on the upstream side of the joint 21 at which the flow is indicated by a white arrow, and this receiving port 24 is connected by a general connecting method of ceramic tubes. The compression joint method used will be applicable.

That is, a PVC pipe or a ceramic pipe has a nominal diameter of 200 m.
In the case of mφ, in the joint 21, the inner diameter of the spigot 22 is set to 202 mmφ as in the case of the PVC pipe standard dimensions, and
A stopper 25 having a large contact surface is formed in the back of the receiving port 24 with an inner diameter of 270 mmφ.

A rubber ring fitting groove 26 is formed on the inner periphery of the receiving port 24.
Is formed, and a rubber ring 27 for a receiving port is fitted into the rubber ring fitting groove 26.

When the downstream side of the ceramic tube 2 is inserted into the receiving port 24 and is brought into contact with the stopper 25, the water is stopped by the rubber ring 27 for the receiving port.

With this joint 21, a PVC manhole 1 is used.
A (see FIG. 5) is connected to the rubber ring receiving port 4 </ b> A on the upstream side and the downstream side of the ceramic tube 2.

Here, in order to apply the joint 21 to the pipe bottom joining method, the following structure is adopted.

That is, the difference d between the center line M of the PVC rubber ring socket 4A and the center line N of the pottery tube 2 is set at a step 28 on the pipe top side behind the outlet 22 adjacent to the contact part 25. To form

Incidentally, instead of the PVC rubber ring socket 4A, a PVC TS joining socket or a PVC pipe with a rubber ring socket may be connected to the joint 21.

The joints 1, 12, 21 as described above
May be changed in design so that it can be applied to the pipe top joining method. That is, the deviation d is set as a step on the tube bottom side.

[0063]

According to the first aspect of the present invention, the PVC pipe and the ceramic pipe are connected by the pipe bottom joining method, and a step is provided on the pipe top side of the joint. Of course, since the joint is made of PVC, the step can be easily formed on the inner surface of the joint so as to be from the bottom of the pipe to the maximum of the top of the pipe, and simply insert the PVC pipe and the ceramic pipe into the joint. Just
A pipe bottom joining method is obtained, and construction becomes easier.

According to the second or third aspect, since the connection between the PVC pipe and the PVC joint can be utilized by using a technique which has already been established, not only can the connection be improved, but also the connection between the PVC joint and the ceramic pipe can be improved. The connection can be made by simply contacting the ceramic tube and using the compression joint method or the color joint method commonly used in ceramic tubes, so that the connection between the PVC joint and the ceramic tube is easy and reliable. Can be obtained, and as a whole, it is possible to obtain a joint for connecting a PVC pipe and a ceramic pipe with good quality.

In particular, even if a step is formed in the thick portion of the joint including the connecting portion, the contact portion, and the ring portion, the axial length can be made as small as possible, and an inexpensive joint can be obtained. It can be used effectively on narrow land.

According to the third aspect of the present invention, the connection between the joint and the porcelain tube can be performed by using a compression joint method widely used among porcelain tubes. Reliability and the like can be obtained, and as a whole, a joint for connecting a PVC pipe and a ceramic pipe with good quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part viewed from an arrow P in FIG. 1;

FIG. 3 is a cross-sectional view of the second embodiment.

FIG. 4 is a cross-sectional view of a third embodiment.

FIG. 5 is a conventional example.

[Explanation of symbols]

1, 12, 21 ... joint, 2 ... ceramic tube, 3, 24 ... socket, 4
... socket part, 6 ... spigot, 7 ... rubber ring, 11, 20 ... step, 13 ... PVC pipe, 14 ... socket, 15 ... contact part, 16 ...
Coupling

Claims (5)

[Claims] 1. A PVC joint for connecting a PVC pipe and a porcelain pipe by a pipe bottom joining method, wherein a first connecting portion for connecting to the PVC pipe is formed on one side of the joint, and the porcelain pipe is connected on the other side. A PVC pipe and a ceramic pipe formed when a pipe bottom between a PVC pipe and a ceramic pipe are made to coincide with each other at the top of the pipe between the first and second connection sections to form a second connection portion to be connected. A PVC pipe / ceramic pipe joint using a pipe bottom joining method, wherein a step substantially equal to the deviation of each center line from the pipe is formed so as to have a predetermined step amount from the pipe bottom to the pipe top. . 2. A PVC joint for connecting a PVC pipe and a ceramic pipe by a pipe bottom joining method, wherein a connection portion for connecting to the PVC pipe is formed on one side of the joint, and a ceramic pipe is formed on the other side. A contact portion that contacts the stopper of the socket portion is formed, a ring portion is formed between the connection portion and the contact portion, and a PVC pipe and a ceramic pipe are provided on the top of the ring portion. Forming a step substantially equal to the difference between the center lines of the PVC pipe and the ceramic pipe, which occurs when the pipe bottoms are matched, and having a seal material interposed between the socket part and the outer periphery of the joint. A joint for connecting PVC pipes and ceramic pipes using a pipe bottom joining method characterized by the following characteristics. 3. A PVC joint for connecting a PVC pipe and a ceramic pipe by a pipe bottom joining method, wherein a connection part for connecting to the PVC pipe is formed on one side of the joint, and a downstream end of the ceramic pipe is formed on the other side. By forming a contact portion that abuts a ring portion, a ring portion is formed between the connection portion and the contact portion, and the bottoms of the PVC pipe and the ceramic pipe coincide with the pipe top side of the ring section. A step which is substantially equal to the deviation of each center line between the PVC pipe and the ceramic pipe which occurs when the pipe is formed is formed, and a single cylindrical coupling extending over the downstream outer periphery of the ceramic pipe and the outer periphery of the joint is slidable. A joint for connecting a PVC pipe and a ceramic pipe using a pipe bottom joining method characterized by being fitted outside. 4. A PVC joint for connecting a PVC pipe and a ceramic pipe by a pipe bottom joining method, wherein a connection portion for connecting the PVC pipe is formed on one side of the joint, and a downstream end of the ceramic pipe is formed on the other side. To form a socket to abut
On the pipe top side of the connection part adjacent to the corresponding contact part, a step substantially equal to the deviation of each center line between the PVC pipe and the ceramic pipe, which occurs when the pipe bottoms of the PVC pipe and the ceramic pipe are matched. While forming
A joint for connecting a PVC pipe and a ceramic pipe using a pipe bottom joining method, wherein a seal material is interposed between the receiving port and the downstream side of the ceramic pipe. 5. A PVC pipe according to claim 1, wherein said PVC pipe is a pipe connection part of a small-diameter PVC square pipe or a PVC manhole.
Joint for ceramic tube connection.