JP2001041367A - Disconnection preventive pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the connection of pipes with each other under a bending condition, which are so constituted as to be of a slip-on type pipe joint each provided with each disconnection prevention function. SOLUTION: The slip-on type disconnection preventive pipe joints are so constituted that a spigot 4 formed at the end part of the other pipe 3 is inserted in the inside of a socket 2 formed at the end part of one pipe 1 to be mutually joined, in such a way that an annual sealing material 6 is compressed in a space between the inner circumferential surface of the socket 2 and the outer circumferential surface of the spigot 4. In this case, a socket ring 11 formed in the outer circumference of the open end of the socket 2, capable of being fitted in a flange 7, is fitted in the outer circumference of the socket 2, a spigot flange 8 is thereby formed up in the outer circumference of the spigot 4, and one pipe 1 and the other pipe 3 are mutually bent in such a way that the socket ring 11 and the spigot flange 8 are not in parallel with each other, so that the socket ring 11 and the spigot flange are mutually fastened together by means of plural fastening members 14 and 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for preventing separation.

[0002]

2. Description of the Related Art As a pipe joint for a ductile cast iron pipe or the like, an insertion port formed at an end of one pipe is inserted into a receptacle formed at an end of one pipe joined to each other. There is known a slip-on type pipe joint in which an annular sealing material is compressed between an inner peripheral surface of a receiving opening and an outer peripheral surface of an insertion opening.

[0003] In the case of laying a pipeline with a pipe having such a pipe joint, a cut groove is generally formed in the ground, and the pipe is horizontally arranged inside the cut groove. They are joined to each other. By the way, when laying a pipeline inside the cut groove formed on the ground as described above, it is difficult to completely flatten the groove bottom formed by the civil engineering work. Therefore, the pipes arranged inside the cut grooves are actually stable in a state where they are slightly different from each other. For this reason, in a pipe joint, a pair of pipes joined to each other is often bent at a slight angle.

In this case, the slip-on type pipe joint has a structure in which the receiving port of one pipe and the insertion port of the other pipe are mutually supported by an elastic sealing material. By the elastic deformation of the pipes, it is possible to cope with bending between the pipes without any problem.

[0005]

As a slip-on type pipe joint provided with a detachment preventing function, for example, a lock ring is attached to a first annular groove formed on the inner periphery of a receiving port, and the lock ring is provided. The second formed on the outer periphery of the insertion hole
Are fitted in the annular groove. However, in the joint in which the lock ring is fitted to both the annular groove of the receiving port and the annular groove of the insertion port as described above, since the lock ring functions to inhibit bending of the pipes, as described above. There is a problem that it is difficult to apply it to a case where it is necessary to join in a bent state in the cut groove.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve such a problem and to easily join pipes constituting a slip-on type pipe joint provided with a detachment preventing function in a bent state. I do.

[0007]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention is directed to a receptacle formed at the end of one tube joined to one another and an insertion formed at the end of the other tube. A slip-on type detachment prevention fitting that inserts the mouth and compresses the annular sealing material between the inner peripheral surface of the receiving port and the outer peripheral surface of the receiving port. The receiving ring which can be engaged with the flange formed on the outer periphery of the opening end of this receiving hole is fitted, an insertion flange is formed on the outer periphery of the insertion opening, and one pipe and the other pipe are bent mutually. Then, after the receiving ring and the insertion flange are arranged so as not to be parallel to each other, the receiving ring and the insertion flange are fastened to each other by a plurality of fastening members in the circumferential direction.

Further, in the present invention, a receiving flange is formed on the outer periphery of the receiving port instead of fitting the receiving ring around the receiving port. With such a configuration, the receiving ring or the receiving flange on the receiving side and the receiving flange on the receiving side are fastened to each other by a fastening member such as a plurality of bolts in the circumferential direction. A separation preventing function can be provided between the insertion openings. Then, the one pipe and the other pipe are bent with respect to each other, and the receiving ring or the receiving flange and the insertion flange are arranged in a state that they are not parallel to each other. By fastening the flange and each other by the fastening member, the pipes constituting the slip-on type pipe joint provided with the detachment prevention function can be joined in a bent state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a receiving port 2 is formed at one end of one pipe 1 joined to each other, and inserted into the receiving port 2 at an end of the other pipe 3. An insertion opening 4 is formed. A seal material accommodation groove 5 is formed on the inner periphery of the receiving port 2, and an annular rubber seal material 6 is mounted in the accommodation groove 5. The sealing material 6 is compressed between the inner peripheral surface of the housing groove 5 and the outer peripheral surface of the insertion port 4 inserted into the sealing material 6, so that the receiving port 2 and the insertion port 4 are separated. The required sealing function is provided between them. A flange 7 is formed on the outer periphery of the opening end of the receiving port 2.

On the outer periphery of the insertion port 4 outside the receiving port 2,
An annular insertion flange 8 is fixed by welding or the like in an fitted state. 9 is the welded portion. The insertion rib 10 is provided at a plurality of appropriate positions along the circumferential direction on the outer periphery of a portion of the insertion hole 4 farther from the reception port 2 than the insertion flange 8. The insertion rib 10 serves to reinforce the insertion flange 8 by being fixed to both the insertion hole 4 and the insertion flange 8 by welding or the like.

On the outer periphery of the receiving port 2, an annular receiving ring 11 is provided.
Has been fitted. The receiving ring 11 is fitted to the pipe 1 from the end of the pipe 1 on the side opposite to the receiving port 2 on the insertion side, and is engaged with the flange 7 of the receiving port 2 in the axial direction. It is arranged in a state where it fits. The receiving ring 11 and the insertion flange 8 are respectively provided with through holes 1 in the axial direction.
2, 13 are formed at a plurality of positions along the circumferential direction. These through holes 12 and 13 are formed coaxially with each other, and the through hole 13 of the insertion flange 8 is formed at a position avoiding the insertion rib 10. A bolt 14 as a fastening member is passed through these through holes 12 and 13, and the receiving ring 11 and the insertion flange 8 are mutually connected by the bolt 14 and the nut 15 screwed to the bolt 14. Has been concluded. The inner diameter of the through holes 12 and 13 is formed larger than the outer diameter of the bolt 14.

By utilizing the fact that the inner diameter of the through holes 12 and 13 is formed larger than the outer diameter of the bolt 14, the through holes 12 and 13, ie, the receiving ring 11 and the insertion hole are used. As shown in FIG. 2, the flange 8 and the bolt 14 are arranged and fastened to each other with a slight inclination therebetween. That is, as shown in FIG. 2, the pipe 1 on the socket 2 side and the pipe 3 on the insertion port 4 side are bent mutually, and the socket ring 11 and the insertion flange 8 are arranged in a state not parallel to each other. The receiving ring 11 and the insertion flange 8 are fastened to each other by bolts 14 and nuts 15.

With such a configuration, the receiving ring 11 associated with the flange 7 of the receiving port 2 and the receiving flange 8 fixed to the receiving port 4 are fastened to each other by the bolts 14 and the nuts 15. Therefore, if the receptacle 2 and the insertion port 4 can be fixed to each other in a direction that prevents the insertion port 4 from coming out of the reception port 2, and therefore, it is only possible to provide a separation preventing function between the receptacle insertion ports. Instead, the pipes 1 and 3 constituting this pipe joint can be joined in a bent state. FIG.
Indicates the bending angle between the tubes 1 and 3. Thereby, it is possible to easily cope with a case where the pipes 1 and 3 must be joined in a bent state in the cut groove.

FIG. 3 shows another embodiment of the present invention. Here, the insertion flange 8 is formed by integral casting with the insertion hole 4 instead of being fixed to the insertion hole 4 by welding or the like as described above. Similarly, the insertion rib 10 is formed by integral casting with the insertion hole 4. Further, instead of the receiving ring 11, a receiving flange 16 is formed on the outer periphery of the receiving port 2 by integral casting with the receiving port 2. Further, a receiving rib 17 for reinforcing the receiving flange 16 is formed by integral casting with the receiving port 2 and the receiving flange 16.

A bolt 14 is passed through through holes 12 and 13 formed in the receiving flange 16 and the insertion flange 8, and a nut 15 is screwed into the bolt 14. Has been granted. Similarly, the tubes 1 and 3 are joined in a bent state. In addition,
1 can be replaced by the receiving flange 16 of FIG. 3, and only the receiving flange 8 fixed to the receiving opening 4 of FIG. 1 can be inserted as shown in FIG. 4 can be replaced with the one integrally cast. That is, the components shown in FIG. 1 and the components shown in FIG. 3 can be appropriately combined. Also,
In the above, the bolt 14 and the nut 1 are used as fastening members.
Although the example by the combination with 5 was illustrated, another appropriate thing can also be used.

[0016]

As described above, according to the present invention, one pipe and the other pipe are bent with respect to each other, and the receiving ring or the receiving flange and the insertion flange are arranged so as not to be parallel to each other. By fastening the receiving ring or the receiving flange and the insertion flange to each other with a fastening member, pipes constituting a slip-on type pipe joint having a detachment preventing function can be joined in a bent state. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a separation prevention pipe joint according to an embodiment of the present invention.

FIG. 2 is a view showing a state in which pipes are joined in a bent state by the separation preventing pipe joint of FIG. 1;

FIG. 3 is a sectional view of a separation-preventing pipe joint according to another embodiment of the present invention.

[Explanation of symbols]

 2 Inlet 4 Inlet 8 Inlet flange 11 Inlet ring 14 Bolt 15 Nut 16 Inlet flange

Continuation of the front page (72) Inventor Masayuki Okawa 2-26 Ohama-cho, Amagasaki-shi, Hyogo F-term in Kubota Mukogawa Works, Ltd. (reference) 3H015 EA05 3H016 AB02

Claims (2)

[Claims] 1. An insertion hole formed at an end of another tube is inserted into a reception hole formed at an end of one tube to be joined to each other so as to be inserted into an inner peripheral surface of the reception tube. A slip-on type detachment prevention fitting designed to compress an annular sealing material between the outer peripheral surface of a mouth and a flange formed on an outer periphery of an opening end of the receiving port. An engaging ring that can be engaged is fitted, an insertion flange is formed on the outer periphery of the insertion port, and one pipe and the other pipe are bent to each other, so that the reception ring and the insertion flange are not parallel to each other. A disengagement prevention pipe joint, wherein the receiving ring and the insertion flange are fastened to each other in a circumferential direction by a plurality of fastening members after being arranged in a state. 2. An insertion hole formed at the end of the other tube is inserted into a reception hole formed at the end of one of the tubes joined to each other, and is inserted into an inner peripheral surface of the reception tube. A slip-on type detachable pipe joint which compresses an annular seal material between the outer peripheral surface of a mouth and a slip-on type detachable pipe joint. To form
After bending the one pipe and the other pipe to each other and disposing the receiving flange and the insertion flange in a state that they are not parallel to each other, the receiving flange and the insertion flange are connected with a plurality of fastening members in the circumferential direction. A detachable pipe joint characterized by being fastened together.