JPH0239105Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a so-called spear socket for connecting sewer pipes.

[Conventional technology and its issues]

This type of spear socket is a type of pipe joint, and is used, for example, in the following cases. That is, Fig. 3 shows a cross-sectional view of a general sewage pipe installation. Sewage or rainwater basins 4, 4 are provided under the shaped side gutters 3, 3, and the main pipe 2 and the basins 4, 4 are connected via attachment pipes 5, 5. This installation pipe 5
is composed of ceramic pipes, reinforced concrete pipes, vinyl chloride pipes, etc., but if the main pipe 2 is a reinforced concrete pipe, attach a ceramic socket and connect the bent pipe 6 from there.
and connect to the tubes 4 and 4 via the straight pipe 7. Furthermore, if the main pipe 2 is a vinyl chloride pipe, a branched pipe 8 must be used as the attached pipe 5.

When a part of the attached pipe 5 is damaged during such pipe installation, only the damaged part is cut off and removed, and replaced with a new synthetic resin pipe. In such a case, since the main pipe 2 and the sewage or rainwater basin 4 are fixed as they are, each end of the existing attached pipe 5 that is being extended is also fixed, so it is necessary to install a new synthetic pipe to intervene. Connection with resin pipes is not easy. Therefore,
A spear socket is used to connect the end of the existing installation pipe 5 to the new pipe.

Therefore, various proposals have been made regarding such spear sockets. For example, in addition to Japanese Utility Model Application No. 59-1792 and Japanese Utility Model Application No. 596680 proposed by the present applicant, there are also the following proposals. That is, Utility Model Application Publication No. 52-56314 consists of an outer tube made of synthetic resin and an inner tube made of synthetic resin that is fitted into the outer tube, and these are placed on the outer periphery of the upstream side of the outer tube. A bulging annular groove fitted with an O-ring for sealing the inner and outer joint pipes is formed, and a spigot with a reduced diameter of the outer pipe is provided on the downstream side of the outer pipe. Standardized at the tube end, the so-called
A spear socket for sewer pipes has been introduced in which a TS joining sleeve (JISK6743 B-type pipe joint) is formed and the end of an existing synthetic resin pipe is joined to the sleeve using an adhesive.

However, such a spear socket has
There is a problem that it cannot be used with existing fixed pipes of different types such as Huyume pipes and ceramic pipes, and furthermore, since there is a spigot on the downstream side of the outer pipe with a reduced diameter of the outer pipe, There is a problem in that when the spear socket is polymerized and shrunk, its length increases.

[Means to solve the problem]

Therefore, this invention was devised to solve such problems, and its gist is as follows:
It consists of an outer tube made of synthetic resin and an inner tube made of synthetic resin that is fitted into the outer tube and is substantially polymerized, and these inner and outer tubes are sealed to the outer periphery on the upstream side of the outer tube. At the same time, an annular groove into which an O-ring is fitted is formed to bulge out, and the downstream side of the outer tube is made to have the same diameter as the insertion port, while a funnel-shaped enlarged diameter portion is formed at the upstream end of the inner tube. Among these:
When the outer tube is polymerized, it is composed of the total length of the outer tube and the axial length of the funnel-shaped enlarged diameter section, and the funnel-shaped enlarged diameter section is
The ends of fixed pipes of different types, such as humid pipes or ceramic pipes, are filled with mortar and are fitted externally and in contact with each other, and a ring that fits internally into the inner pipe and the funnel-shaped enlarged diameter part A sewage pipe spear socket is characterized in that a stopper made of synthetic resin is provided at the upstream end of the inner pipe, and a stopper made of synthetic resin is integrated with a small enlarged diameter portion joined to the base side of the pipe.

[Effect]

Since the lengths of the inner and outer tubes are the same, when they are superimposed, they can be constructed into a short length consisting of the total length of the outer tube and the axial length of the funnel-shaped enlarged diameter portion, making it easy to carry into the narrow space to be repaired. Can be done. At this time, a stopper matching the diameter of the fixed pipe, such as the humid pipe, exposed by excavation is fitted into the inner pipe. Therefore, a funnel-shaped enlarged diameter part made of synthetic resin was fitted onto and abutted on the end of a fixed pipe such as a fume pipe, and then the space formed by this funnel-shaped enlarged diameter part and the fixed pipe was filled with mortar. Then slide the downstream side of the outer tube and pull it out.
Insert into the socket of another synthetic resin pipe and backfill.

〔Example〕

Hereinafter, the configuration of the present invention will be explained in detail using examples. Figure 1 shows the spear socket 1 of this embodiment.
This spear socket 10 is made up of an inner tube 15 and an outer tube 16 into which the inner tube 15 is inserted, and an annular groove 17 is formed on the upstream side of the inner tube 15. An O-ring 11 is fitted to seal the inner and outer tubes 15 and 16. In addition, in FIGS. 1 and 2, the downstream end of the outer pipe 16 has the same diameter, and the downstream attachment pipe 5' (in FIG. 4, the inlet/outlet pipe 13 extending from the box 4) The spigot can be inserted into the receptacle 19 of the Also,
A funnel-shaped enlarged diameter portion 20 is provided at the upstream end of the inner tube 15.
, and several hook-shaped protrusions 22 are provided on the outer periphery of this funnel-shaped expanded diameter portion 20 .

In addition, if both the inner and outer tubes 15 and 16 are blow molded, and the outer diameter of the inner tube 15 is 150 mm,
The total axial length of the outer tube 16 is 195 mm, and the maximum opening diameter of the funnel-shaped expanded diameter portion 20 is 210 mm.

Here, a stopper 23 is fitted and fixed to the base of the funnel-shaped enlarged diameter portion 20. This stopper 23 includes a ring 23' that fits inside the inner tube 15, and a small diameter enlarged part 2 that is joined to the base side of the funnel-shaped enlarged diameter part 20.
The inner diameter of this ring 23' is larger than the inner diameter of the existing pipe 21, which is the pipe to be connected, so as not to hinder the flow in the pipe. He is trying to join to the opening inclined surface of the shaped enlarged diameter part 20.

This stopper 23 is arranged so that the outer diameter of the existing pipe 21 is the size shown in FIG.
This is advantageous if the diameter is smaller than the inner diameter of the

Therefore, if only the stopper 23 is prepared in multiple sizes, construction will be easier, and the stopper 23
Can also be used multiplexed.

Further, this stopper 23 serves as a positioning guide for centering the end of the existing pipe 21, and also serves as a dam for filling with mortar.

Next, to describe the operation of this embodiment, the existing pipe 21
For example, in the case where the existing pipe 21 is a reinforced concrete pipe and the existing pipe 21 is damaged, in order to use the spear socket 10, the area around the existing pipe 21 is excavated and the defective part is cut perpendicular to the pipe axis. Next, as shown in the first diagram, the inner and outer tubes 15 and 16 are
In the contracted state, the funnel-shaped expanded diameter part 20 is inserted into the existing pipe 21
The mortar 24 is inserted between the inner circumference of the funnel-shaped enlarged diameter portion 20 and the outer circumference of the existing pipe 21 .
Next, the outer tube 16 is appropriately stretched and inserted into the socket 19 of the other inlet/outlet tube 13. This socket part 19
Usually, an O-ring 25 is fitted to the holder.

Next, a wire (not shown) is attached to the coronoid process 22.
The wire is then pulled to an appropriate location to attach and fix it, and the mortar is backfilled in an uncured state. Therefore, the existing pipe 21 and the downstream inlet/outlet pipe 13 can be connected.

Note that the same work as described above is required for the existing pipe 21, not only for reinforced concrete pipes but also for ceramic pipes. Further, on the downstream side of the inner tube 15, an enlargement limit line for the outer tube 16 may be provided around the outer periphery thereof.

[Effect of idea]

According to the present invention, the following effects are achieved.

When the inner and outer tubes are superimposed, it is the shortest length of the spear socket consisting of the entire length of the outer tube and the axial length of the funnel-shaped enlarged diameter part, so it is a spear socket that can be made longer by stretching the inner and outer tubes, yet it can be repaired in a narrow repair space. However, construction can be done easily.

The spear socket of the present invention has a fixed pipe made of a different type of pipe, such as a ceramic pipe, which has a large outer diameter, and is equipped with a funnel-shaped enlarged diameter part that can be filled with mortar around the outer periphery of the large outer diameter. Therefore, this funnel-shaped enlarged diameter part has a large opening with a taper larger than that of the TS joint (for example, in the case of a TS joint,
The diameter of the opening is 166mmφ for a tube diameter of 150mmφ, but in this example, the diameter of the opening is 210mm for a tube diameter of 150mmφ). A stopper that integrates a small enlarged diameter part that joins the base side of the enlarged diameter part,
Since it is installed at the upstream end of the inner pipe, it serves as a dead end for insertion into the fixed pipe and as a dam for mortar filling, making construction work more efficient. As a result, the position of the tube end of the fixed tube in the funnel-shaped expanded diameter portion can be clarified, and the axes can be aligned at the time of insertion.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway cross-sectional view of an embodiment of the present invention;
The figure is a usage state diagram of the same embodiment, and FIG. 3 is a sectional view of a general sewer pipe installation. 10... Spear socket, 11... O-ring, 15... Inner tube, 16... Outer tube, 20...
Funnel-shaped enlarged diameter portion, 21... existing pipe, 23... stopper, 24... mortar.

Claims (1)

[Scope of utility model registration request] an outer tube made of synthetic resin; fitted inside the outer tube;
and an inner tube made of a synthetic resin that is substantially polymerized, and an annular groove fitted with an O-ring for sealing these inner and outer tubes is formed on the outer periphery of the upstream side of the outer tube. , while the downstream side of the outer tube is used as a spigot with the same diameter, a funnel-shaped enlarged diameter portion is provided at the upstream end of the inner tube.
When the outer tube is polymerized, it is composed of the total length of the outer tube and the axial length of the funnel-shaped enlarged diameter section, and the funnel-shaped enlarged diameter section is
The ends of fixed pipes of different types, such as humid pipes or ceramic pipes, are filled with mortar and are fitted externally and in contact with each other, and a ring that fits internally into the inner pipe and the funnel-shaped enlarged diameter part A drain socket for a sewer pipe, characterized in that a stopper made of synthetic resin is provided at the upstream end of the inner pipe, and a stopper made of synthetic resin is integrated with a small enlarged diameter part joined to the base side of the pipe.