JPS5920076B2 - Connecting devices for bent pipes in piping systems - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connecting device for curved pipes in a piping system.

Conventionally, this type of piping system has been constructed with pipes that have one socket and one socket, including bent pipes, or a bent pipe with both sockets and a straight pipe with one socket and one socket. Insert the spout into the socket of the adjacent pipe and fix the core with adhesive, or, as shown in Figure 6, create a groove 4 on the inner circumferential surface of the socket 2 and attach a rubber core to the core. Insert the rubber ring 5'' into the socket 2〃 and bring it into close contact with the outer circumferential surface of the spigot 1'' to seal the core, and attach the fixing fittings 1'' and 8'' to the respective pipes to be connected. , and connect these two fittings together by drawing them together with a connecting bolt 16'', and attaching one to the open end of the socket 2'' and the other to the protrusion 6/'X formed in the socket, for example, the groove 4.
Connect and fix the two adjacent pipes by abutting and locking the protruding part of the single socket 2" on the outer periphery, and then tightening the respective fixing fittings I" and 8" to the pipes with tightening bolts 16". Was.

However, in the former case, not only does the problem of solvent cracks occur, but there is also a danger of fire, and there is a risk that the joint may peel off due to expansion and contraction due to environmental temperature differences, etc., resulting in leakage.

In the latter case, the above-mentioned inconveniences and inconveniences of the former can be solved, but since adjacent pipes are fixed only by frictional resistance, if the diameter of the pipe becomes large, there is a risk that the bent pipe will shift and come off due to the pressure of flowing water. However, in order to prevent this, there are disadvantages such as the fact that the bent pipe must be embedded and held within a concrete block.

Although the latter problem is solved in the device disclosed in Japanese Utility Model Application Publication No. 47-6411, the connection structure for adjacent pipes is a joint at one socket.

A flange is provided on one part, a flange is also provided on the other corresponding pipe spigot, a press ring is interposed between the two flange, and a connecting bolt is used to pull the flange together, and then connect and fix both adjacent pipes. This is what I did.

However, in order to configure the above connection structure, both pipes to be connected,
In other words, manufacturing is troublesome, such as providing a collar at the joint of two adjacent pipes and forming a separate push ring, which not only requires time but also has high manufacturing costs. It has the disadvantage that it cannot be used with PVC pipes made of vinyl material.

In addition, to fix the connection, first insert the connecting bolt into the brim of one of the corresponding tubes, that is, the tube with the socket, then set the press ring and insert the socket of the other tube. Since the connection (connection work) must be performed by inserting the tip of the connecting bolt into the collar of the pipe, the construction (piping work)
There was a problem in that it required time and effort.

The present invention was made in view of the current situation, and it completely eliminates the drawbacks of the pipe connection structure in conventional piping systems, can be easily and inexpensively manufactured, and can be easily constructed. A connecting device for bent pipes in piping systems including bent pipes, which absorbs the expansion and contraction of pipes due to environmental temperature differences and prevents leakage, since even large-diameter pipes cannot be unplugged due to the pressure of flowing water. The purpose is to provide the following.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.

Piping system A is a double-end bent pipe (bend pipe) with both ends having the same diameter as the other parts and both ends serving as spigots 1, and both ends having a larger diameter than the other parts. form,
A double socket straight pipe having a socket 2 formed in the armpit part with an inner diameter approximately the same as the outside diameter of the socket I of the double socket bent pipe a, and a socket 2 of the double socket straight pipe at one end. By forming a socket 2' with the same diameter and a spigot 1' with the same diameter as the spigot row of the double spigot bent pipe a at the other end, a large number of single spigots and single spigot straight pipes C... configured.

The containers a, t), and c are, for example, vinyl chloride pipes made of vinyl chloride material.

The above-mentioned double-insert bent pipe a1 double-socket straight pipe b1 one-side socket, one-side straight pipe C are all formed to have the same diameter except for the sockets 2 and 2', and the container pipes a, b, and c are All sockets 1, 1', socket 2
, 2' are formed to have almost the same wall thickness, and the sockets 2, 2' are formed with approximately the same thickness.
2' has a stepped portion 3 formed at its base.

Further, the sockets 2, 2' have an annular groove 4 along the circumferential direction on the inner peripheral surface, and a rubber ring 5 is fitted and inserted into the groove 4.

The groove 4 is provided to protrude from the outer peripheral surface of the sockets 2, 2', and a protrusion 6 is formed on the outer periphery of the sockets 2, 2'.

Therefore, the piping system A is such that when straight pipes with both sockets are installed at both ends of the curved pipe a with both sockets, one of the straight pipes C with a single socket and single socket is connected in the extending direction of the curved pipe a with both sockets. Place it in the socket 2, 2'
correspond to the spigots 1゜1 of the bent pipe a at both spigots, fit them together, and place the rubber rings 5 installed in the sockets 2, 2' around the outer periphery of the spigots 1, 1 of the bent pipe a at both spigots. close to the surface.

Then, when the straight pipes with both sockets are connected to both sides of the bent pipe a with both sockets, the fixing fittings 7 and 8 are attached to the straight pipe C with the single socket and single socket, and the fittings 7 and 8 are attached to the bent pipe a with both sockets. A metal fitting 9 is attached, and the tension member 10 is tensioned and installed through the latching metal fitting 9 and across the fixing metal fittings 7 and 8Vl.

securing bracket? , 8 consists of annular ring bodies 7b and 8b with flanges 7a and 8a, which are fitted into the outer periphery of the sockets 2 and 2' of the straight pipe C with both sockets and the straight pipe C with one socket, from the base side thereof. Then, the groove 4 abuts and latches onto the protrusion 6 formed on the outer peripheral surface of the sockets 2 and 2'.

Further, insertion holes 11 are bored at symmetrical positions in the 7 flange 7a, 8a.

In addition, the fixing fittings 7.8 may be formed into an annular shape in advance, or may be formed into a split ring shape that can be divided. However, in the latter case, it is convenient because it can be easily installed on site.

Further, the flanges 7a and 8a do not necessarily need to be formed in an annular shape, and it is sufficient if they are formed to protrude only at required locations.

The latching fitting 9 is formed in the shape of a brim with a hole 12 in the center, and a latching hole 13 is bored through the latching hole 13 in the thickness direction at a symmetrical position. It is slidably fitted into the

The tension member 10 is made of a metal rod or the like having threaded portions 10a at both ends, and is inserted through the latching hole 13 of the latching fitting 9 to form the threaded portion 10a.
Insert into the insertion hole 111/i1m of the fixing bracket 7.8, screw the nut 14 into the armpit from the opposite side, fix it between the fixing brackets 7 and 8, and insert it both ways via the latch bracket 9. The bent pipe a is held down by water pressure in a direction opposite to the outward force acting on the bent part of the bent pipe.

Therefore, these fixing fittings? , 8, latch fitting 9, tension member 1
0 constitutes a detachment prevention device that prevents the bent pipe from being removed or dislodged by water pressure.

Next, to briefly explain how to attach the detachment prevention device described above to the piping connection part, first, the latch fitting 9 is fitted into the outer periphery of the double-end bent pipe a, halfway in the pipe direction, and then the both-end ports are fitted. 1.
1K, a double socket straight pipe with the fixing fittings 7 and 8 abutted against the protrusions 6 and 6 on the outer circumferential surface, and a socket 2 with a single socket and a single straight pipe C,
2' and fit them together.

At this time, the rubber rings 5 installed in the sockets 2, 2' are brought into close contact with the outer circumferential surfaces of the insertion holes 1, 1 of the bent pipe a at both entrances, thereby ensuring airtightness (
Sealing performance).

Then, when the double socket straight pipe is placed on the rear side of both sides of the double socket bent pipe a, the flange of the fixing fitting 7.8 provided at the socket 2.2' with the single socket straight pipe C 7a.

8a VC, the tension member 10 is inserted and installed across the bored insertion hole 11 and the latching hole 13 of the latching fitting 9 provided on both the bent pipes a, and the corresponding opposite side of the fixing fitting 7.8 is installed. side, i.e.
Screw the nuts 14 and 14 onto the threaded portions 10a and 10a of the tension member 10 protruding in the extension direction of the bent pipe a, respectively, and tighten the nuts 14 and 14 so as to pull the fixing fittings 7 and 8 together. If the tensile member 10 is tightened uniformly and tensioned between the two fixing fittings 7 and 8 via the latching fitting 9, installation of the detachment prevention device is completed, and at the same time both insertion ports 1 of the double insertion bent pipe a are fixed.
, 1 is a straight pipe with both sockets, and a straight pipe C with a single socket is connected to the socket 2.
, 2' are securely fitted and fixed.

Therefore, the detachment prevention device is activated by the flowing fluid pressure.
In other words, the outward force acting on the curved portion of the double-spill bent pipe a, one spout 1 of the double-spill straight pipe a, or the one socket 2 of the single-spill straight pipe C, The force in the opposite direction to the force that tends to pull out from 2', specifically the tension member 10
The tension force prevents the pipe from slipping out, and it can also simultaneously connect and fix the straight pipe with both sockets and the straight pipe with single socket and single socket C to both ends of the bent pipe with double sockets A. This makes the construction easy and reliable.

Note that the tensile material 10 does not have to be a rod material as described above, but may be made of a material such as wire rope, and
It may be separately tensioned from the fixing fitting to the latching fitting 9.

Therefore, the double socket straight pipe connected to the double socket bent pipe a and the single socket single socket straight pipe CVC are respectively single socket single socket straight pipe C2C.
Connect the sockets 2, 2' and the spigot 1' one by one by matching them with each other, and connect each connection part to the fixing bracket 1 as before.
6. Connect with 17 using connecting bolt 18.

The present invention achieves excellent effects as described below by virtue of its slanted configuration.

(1) A detachment prevention device was provided using protrusions provided on the outer circumferential surface of the sockets of the double socket straight pipe and the single socket single socket straight pipe that fit and connect to the sockets at both ends of the curved pipe ( installed),
For example, it can be used to connect PVC pipes made of vinyl chloride material, so it can be widely used as a connection device (separation prevention device) for curved pipes in piping systems, and is therefore suitable for practical use.

(2) A device to prevent the bent pipe from coming off is installed and fixed (tensioned erection) by using the protrusion provided on the socket of the double socket straight pipe and the single socket straight pipe and hooking it to this. This eliminates the need to form a collar on the connecting pipe itself as in the past, and by installing a separation prevention device, it is possible to install a straight pipe with both sockets and a single socket with a single socket at both ends of the bent pipe. Installation is easy as the straight pipe and mouth can be connected and fixed at the same time.
It is easy to carry out, and the connection between the pipes can be reliably fixed by the tensile force of the tensile material.

(3) The sockets of the double socket straight pipe and the single socket straight pipe that are connected to both sides of the bent pipe are tensioned with fixing fittings that abut and engage the protrusions on the outer periphery of the sockets. By connecting and fixing the pipe in a state where it is pulled in the direction of the bent pipe using a tensile material, even if the flowing water pressure is large such as with a large-diameter pipe, it is possible to reliably prevent the bent pipe from coming off, and at the same time, the entire length of the bent pipe can be prevented. The strength of the bent pipe can also be increased by using tensile material stretched across the pipe.

Therefore, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of a connecting device for a curved pipe in the piping system of the present invention, in which Fig. 1 is a partially cutaway front view of the main part, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 The figure is Figure 1 m-
■A cross-sectional view along the line, Figure 4 is a cross-sectional view along line IV-IV in Figure 1, Figure 5 is a schematic explanatory diagram of the entire piping system,
FIG. 6 is a half-sectional view of the main parts of a conventional example. a...Bent pipe, b...Both socket straight pipe, C.
...Single socket, single socket, straight pipe, 1...Single socket, straight pipe, 1'-...Single socket, single socket, straight pipe, 2... ...Double socket straight pipe socket, 2'...
Single socket, single outlet, straight pipe socket, 7.8... Fixing fitting (separation prevention device), 9... Latching metal fitting (separation prevention device), 10... ...Tension material (separation prevention device).

Claims (1)

[Claims] 1. A bent pipe with both ends as sockets, a straight pipe connected to one end of this bent pipe formed into both sockets, a straight pipe connected to the other end formed into a single socket and one socket, and each socket An annular groove is provided on the inner circumferential surface of the mouth so as to form a protrusion on the outer circumferential surface, a rubber ring is fitted and inserted into the groove, and a bent pipe is inserted into the socket provided with the rubber ring. Fit and connect the bent pipe and the straight pipe with both sockets and the straight pipe with single socket, and connect the straight pipe with both sockets and the straight pipe with single socket with one socket between the bent pipe. A detachment prevention device is installed on the outer periphery of both sockets, extending over the protrusions of the facing sockets and pressing the bent pipe with a force in the opposite direction to the outward force acting on the curved part of the bent pipe due to fluid pressure. A ring-shaped fixing fitting is constructed using a protrusion on the surface, and has a flange that abuts and engages the detachment prevention device with the protrusions of the opposite sockets, and a bent pipe. A connecting device for a curved pipe in a piping system, comprising a collar-shaped latching fitting that is fitted on the outside, and a tension member that passes through the latching fitting and is tensioned and installed between the fixing fittings.