JP3083418B2 - Pipe fittings for water pipe bridges - Google Patents

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 a water pipe bridge for forming a water pipe bridge constructed by connecting a plurality of pipes sequentially in an arch shape between a pair of anchor blocks.

[0002]

2. Description of the Related Art When laying a pipeline across a river or the like, the pipeline is often constituted by a water pipe bridge erected in the air between a pair of anchor blocks on both banks. In the water pipe bridge, it is necessary to provide a camber at the center of the pipe between the anchor blocks, and to connect a plurality of pipes sequentially so that the entire pipe has an arch shape having a gentle curvature.

[0003]

Therefore, each pipe joint in the water pipe bridge is capable of giving a predetermined bending angle to the pipeline and bending without being bent by an external load such as its own weight or water weight. There is a problem that it must have rigidity.

Accordingly, the present invention solves such a problem, and provides a pipe joint for a water pipe bridge which has a bending rigidity that can provide a predetermined bending angle to a pipe line and does not bend under an external load. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to forming a socket at one end of one pipe joined to each other and inserting the socket at the end of the other pipe into the socket. Forming an annular groove, forming an annular groove on the outer periphery of the opening, fitting a pair of groove width adjusting rings at intervals in the annular groove, between the side surfaces of these groove width adjusting rings, A bent groove whose axis is bent with respect to the insertion opening is formed, and a lock ring associated with the inner periphery of the receiving opening is fitted to the bottom of the annular groove formed with the bent groove in a pressed state. .

[0006]

According to such a configuration, simply fitting a pair of groove width adjusting rings into a normal circumferential annular groove having no inclination, ie, no bending, forms a bent groove between the side surfaces of the groove width adjusting rings. The required bending angle is imparted to the pipeline by fitting the lock ring in a pressed state to the bottom of the annular groove of the insertion opening in which the bent groove is formed. At this time, the receiving port and the insertion port are firmly joined by the lock ring engaged with the inner periphery of the reception port while being fitted to the bottom of the annular groove in which the bent groove is formed in a pressed state, so that the joint portion is formed. Required bending rigidity.

[0007]

FIG. 3 shows a schematic structure of a water pipe bridge according to the present invention. Here, reference numeral 10 denotes a river, and concrete anchor blocks 12 are formed on both sides of the river. And with these anchor blocks 12 as the base end,
A water pipe bridge 14 extends in the air above the water surface of the river 10. The water pipe bridge 14 is formed in an arch shape by joining a plurality of pipes 16 with pipe joints, and a camber 20 having an air valve 18 is provided at a central portion thereof. In the water pipe bridge 14 illustrated in FIG. 3, a normal mechanical pipe joint 22 and a pipe joint 24 according to the present invention are used.

FIG. 1 shows a detailed structure of a pipe joint 24 according to the present invention. Here, reference numeral 30 denotes a socket formed at an end of one of the pipes, and on the inner periphery thereof, in order from the opening end side, a tapered sealing material pressure contact surface 32, a lock ring housing groove 34, and an insertion housing A part 36 is formed. Reference numeral 38 denotes an opening formed at the end of the other tube, which is inserted into the receiving port 30. On the outer periphery of the insertion port 38, a relatively wide annular groove 40 having a rectangular cross section is formed in the circumferential direction.

As shown in FIGS. 1 and 2, the annular groove 40 has a pair of groove width adjusting rings 42 spaced apart in the axial direction.
44 are fitted. Each groove width adjustment ring 42, 44
The bent groove 46 is formed between the other side surfaces in the central portion of the annular groove 40 by being formed so as to be tight in the circumferential direction and being arranged so that one side surface is in contact with the side surface of the annular groove 40. I do. The bent groove 46 is inclined by an angle C with respect to the direction of the outer periphery of the insertion opening 38. Groove width adjustment ring 42,
The outer peripheral surface of the insertion hole 38 when fitted in the annular groove 40
Is made to be flush with the outer peripheral surface.

A lock ring 48 is provided in the lock ring receiving groove 34.
The lock ring 48 has a rectangular cross-section and is formed so as to be divided into circumferential portions. The lock ring 48 is fitted in the bent groove 46 in a pressed state by a set bolt 50 screwed through the socket 30. A seal cap 52 using a cap nut is screwed into a distal end portion of the set bolt 50 protruding from the outer peripheral surface of the receiving port 30.

An annular sealing member 54 is arranged between the sealing member pressing surface 32 and the outer peripheral surface of the insertion opening 38. A press ring 56 is fitted into the insertion opening 38, and the press ring 56 is fastened to the flange 60 at the open end of the receiving port 30 by a T-head bolt 58, so that the sealing material 54 is compressed by the press ring 56 and Demonstrates the sealing function.

In such a configuration, as shown in the figure, when the insertion port 38 is inserted into the receiving port 30 to compress the sealing material 54 and fit the lock ring 48 into the bent groove 46, the receiving port 30 And the insertion opening 38 are joined to each other in a state of being bent at an angle C equal to the inclination angle C of the bending groove 46. For this reason, as shown in FIG.
By installing as many as necessary, the water pipe bridge 14 can be formed in an arch shape as shown in the figure.

The lock ring 48 is fitted into the bent groove 46 and is received in the lock ring receiving groove 34, and is pressed by the set bolt 50 against the bent groove 46, that is, the bottom of the annular groove 40. The mouth 38 is firmly joined, and sufficient bending rigidity that does not bend under an external load such as its own weight or water weight is provided.

As described above, the bent groove 46 can be easily formed simply by fitting the pair of groove width adjusting rings 42 and 44 into the normal circumferential groove 40 having no inclination. Further, by exchanging the groove width adjusting rings 42 and 44 to form bent grooves having different inclination angles, the receiving port 30 and the insertion port 38 can be bent at an arbitrary angle.

[0015]

As described above, according to the present invention, a bent groove having an inclined structure can be easily formed simply by fitting a pair of groove width adjusting rings into the annular groove on the outer peripheral surface of the insertion opening. By fitting a lock ring related to the inner periphery of the receptacle in the pressed state to the bottom of the annular groove of the receptacle where this bent groove is formed, the receptacle and the receptacle are firmly joined to the joint part. After giving sufficient bending rigidity, the required bending angle can be given to the joint portion.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a pipe joint for a water pipe bridge according to an embodiment of the present invention.

FIG. 2 is an external view of an insertion opening in FIG.

FIG. 3 is a diagram showing a schematic configuration of a water pipe bridge based on the present invention.

[Explanation of symbols]

 30 Receptacle 38 Insertion opening 40 Annular groove 42 Groove width adjustment ring 44 Groove width adjustment ring 46 Bend groove 48 Lock ring C Angle

Continuation of the front page (56) References Japanese Utility Model Sho-63-5010 (JP, U) Japanese Utility Model Sho 58-35078 (JP, U) Japanese Utility Model Showa 62-177796 (JP, U) Japanese Utility Model Utility Model No. 2-16895 (JP) , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 21/00-21/08

Claims (1)

(57) [Claims] 1. A pipe joint for a water pipe bridge constructed by sequentially connecting a plurality of pipes in an arch shape between a pair of anchor blocks, wherein a receiving port is formed at an end of one of the pipes joined to each other. At the same time, an insertion hole to be inserted into the socket is formed at the end of the other tube, an annular groove is formed on the outer periphery of the insertion hole, and a pair of groove width adjusting rings are fitted at intervals in the annular groove. In addition, a bent groove whose axis is bent with respect to the insertion opening is formed between the side surfaces of these groove width adjustment rings, and the bottom of the annular groove where the bent groove is formed is formed with the inside of the receiving hole. A pipe joint for a water pipe bridge, wherein lock rings related to the circumference are fitted in a pressed state .