JPH09105109A - Aqueduct with walkway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water pipe bridge with a walkway which is formed by connection of a plurality of cast iron pipes to remarkably reduce the welded parts to the cast iron pipes. SOLUTION: In a water pipe bridge 1 constituted of a plurality of cast iron pipes 2 which are connected by inserting the insertion end 6 into the receive end 7, a walkway 5 is installed along the axial direction of the pipe, above the water pipe bridge and a fixing flange 19 is welded at the outer peripheral face of the receive end 7. Support members 20 of the receive end side supporting the walkway 5 are connected and fixed to the fixing flange 19 through hexagonal bolts and nuts 25, 26 arranged at a plurality of peripheral positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pipe bridge with a corridor which is composed of a plurality of cast iron pipes and has a corridor for workers to walk and inspect.

[0002]

2. Description of the Related Art Conventionally, a water pipe bridge is composed of a pipe line having a gentle curvature in which a plurality of pipes are joined, and is installed in a river or the like. Of these, for water pipe bridges formed by joining steel pipes, a corridor for inspection was provided by welding the steel pipes over the entire length of the pipeline.

[0003]

Although it is relatively easy to weld the corridor with the steel pipe as described above, the water pipe bridge formed by joining cast iron pipes (ductile cast iron pipes, etc.) However, welding is more difficult than with steel pipes, and when welding a corridor to a cast iron pipe over the entire length of the pipe, the welding work is difficult because the welded portion is very large. For this reason,
It has been shunned to attach a walkway to a water bridge formed by joining cast iron pipes.

Therefore, the invention according to claim 1 of the present invention provides a water pipe bridge which is formed by joining a plurality of cast iron pipes and which has a walkway by significantly reducing the welded portion to the cast iron pipes. The purpose is to do.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention comprises a plurality of cast iron pipes joined by inserting an insertion port into a receiving port. In the constructed water pipe bridge, a walkway along the pipe axis direction is arranged above this water pipe bridge, and a fixing flange is provided on the outer peripheral surface of the receiving port, and this fixing flange is provided at a plurality of positions in the circumferential direction. It is characterized in that a supporting member for supporting the above-mentioned corridor is fixed via a fastener provided.

According to this, since the supporting member for supporting the corridor is fixed to the fixing flange via fasteners arranged at a plurality of circumferential positions, the fixing flange is used for welding to the cast iron pipe. Therefore, it is possible to attach the support member to the receiving side while significantly reducing the welded portion to the cast iron pipe.

Further, due to the wind pressure received by the corridor, a rotational force that tends to rotate in the circumferential direction of the pipe acts on the support member,
Since the support member is fixed by fasteners at a plurality of positions in the circumferential direction, it can withstand a large rotational force.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 4, reference numeral 1 denotes a water pipe bridge installed in a river or the like, and a plurality of ductile cast iron pipes 2
It is composed of a conduit 3 having a gentle curvature. An air valve 4 is provided at the center of the conduit 3. A corridor 5 for inspection is provided above the water pipe bridge 1 along the pipe axis direction.

As shown in FIG. 3, an insertion port 6 is formed at one end of the ductile cast iron pipe 2 and a receiving port 7 is formed at the other end. Then, a plurality of ductile cast iron pipes 2 are joined by inserting the insertion port 6 of the one ductile cast iron pipe 2 into the receiving port 7 of the other ductile cast iron pipe 2.

A taper surface 8 is formed on the inner peripheral surface of the opening of the receiving opening 7 over the entire circumference. Between the taper surface 8 and the outer peripheral surface of the insertion opening 6, a ring-shaped rubber ring 9 is used as a sealing material. Is fitted. In addition, a lock ring housing groove 10 is formed on the inner peripheral surface of the receiving port 7 and at the back of the tapered surface 8. The lock ring housing groove 10 is formed by cutting one location in the circumferential direction. A lock ring 11 having a split structure is fitted therein. A backup ring 12 is fitted onto the insertion opening 6 between the lock ring 11 and the rubber ring 9. On the outer periphery of the tip of the insertion opening 6, a protrusion that engages with the lock ring 11 in the tube axial direction to prevent the insertion opening 6 from being separated from the receiving opening 7.
13 are formed all around.

A push ring 14 for pressing the rubber ring 9 in the insertion direction of the insertion slot 6 is fitted on the insertion slot 6. The push ring 14 has a halved structure divided into two in the circumferential direction. T-head bolts 16 and nuts 17 for pulling the push ring 14 toward the insertion direction of the insertion port 6 are provided at a plurality of circumferential positions of the reception port flange 15 formed at the end of the reception port 7. These nuts 17
By tightening, the push ring 14 moves in the insertion direction of the insertion slot 6, and the rubber ring 9 is pressed in the insertion direction of the insertion slot 6.

A semicircular fixing flange 19 is welded to the outer peripheral surface of the upper half of the receptacle 7 at a position deeper than the receptacle flange 15. To this fixing flange 19, a receiving-side support member 20 that supports the walkway 5 from the receiving port 7 side is fixed. That is, the receiving port side supporting member 20 is provided on the outer peripheral surface of the upper half of the receiving port 7 and the supporting plate 21 having a wider width toward the upper part, and both side portions of the upper surface of the supporting plate 21. The angle member 22 and side support plates 23 provided on both sides of the upper portion of the support plate 21 and formed wider toward the pipe axis toward the upper portion.
It is composed of

The support plate 21 is provided at a plurality of positions in the circumferential direction (see FIG. 2).
Then, with the hexagon bolts 25 (one example of fasteners) inserted through the upper portion and the left and right side portions) and the nuts 26 (one example of fasteners) screwed to the hexagon bolts 25, the fixing flange 19 is fixed. It is connected and fixed. Also, as shown in FIG.
The angle member 22 and the side support plate 23 are integrally welded to each other via a mounting plate 28, and by connecting and fixing the mounting plate 28 to the supporting plate 21 with bolts and nuts 29, the angle member is fixed.
22 and side support plate 23 are attached to support plate 21.

The walkway 5 has a walk board 31 on which an operator walks.
And a side frame 33 having a handrail 32. The step plate 31 is divided into a plurality of pieces in the tube axis direction, supported between the angle members 22 on both sides, and fixed by bolts 47. On the lower part of the step plate 31, there is formed a convex portion 31a which can be freely inserted and removed between the angle members 22 on both sides. Further, the side frame 33 is divided into a plurality in the pipe axis direction, and the end portion of one side frame 33 and the end portion of the other side frame 33 which are adjacent to each other are provided with the angle member 22 via a bolt 34 and a nut 35. It is connected and fixed to. The above bolt
The bolt hole 36 of the side frame 33 into which the 34 is inserted is formed as a long hole that is long in the pipe axis direction.

Further, as shown in FIG. 1, the insertion opening side support member 38 for supporting the walkway 5 is also provided in the insertion opening 6.
The insertion side support member 38 is composed of a support plate 39, an angle member 40, and a side support plate 41, like the reception side support member 20, and the support plate 39 is externally fitted to the insertion port 6. Welded to a steel mounting band 42. This mounting band 42 has a structure in which it is divided into two in the circumferential direction.
It is attached by pinching the outer peripheral surface of the insertion opening 6 with 44. A rubber plate is placed between the mounting band 42 and the insertion opening 6.
45 is sandwiched.

The operation of the above configuration will be described below.
According to this, the receiving side support member 20 supporting the walkway 5 is
Hexagon bolts 25 and nuts 26 arranged at multiple points in the circumferential direction
Since it is fixed to the fixing flange 19 via
Welding to the ductile cast iron pipe 2 is required only with the fixing flange 19 described above. Therefore, it is possible to greatly reduce the welded portion to the ductile cast iron pipe 2 and attach the socket side support member 20 to the socket 7 side. it can. Similarly, since the insertion port side support member 38 is fixed to the insertion port 6 by being fixed by the attachment band 42, the insertion port side support member 38 can be attached to the insertion port 6 without welding. In this way, since the corridor 5 can be easily provided by significantly reducing the welded portion to the ductile cast iron pipe 2, the corridor 5 is utilized to make the ductile cast iron pipe 2
The water pipe bridge 1 consisting of can be easily inspected.

Further, due to the wind pressure received by the corridor 5, a rotational force that tries to rotate the receiving side support member 20 in the circumferential direction of the pipe 2 acts, but the receiving side support member 20 has a plurality of hexagons in the circumferential direction. Since it is fixed by the bolt 25 and the nut 26, it is possible to endure a large rotational force.

When the insertion opening 6 moves in the pipe axis direction with respect to the receiving opening 7 due to changes in the ground, thermal expansion of the ductile cast iron pipe 2, or the like, the corridor 5 is also moved in the pipe axial direction by the length of the long diameter of the bolt hole 36. Therefore, the movement of the insertion opening 6 in the tube axis direction can be absorbed.

In the above embodiment, the hexagonal bolt 25 and the nut 26 are used as an example of the fastener, but a hexagon socket head cap screw or the like may be used.

[0020]

As described above, according to the first aspect of the present invention, the supporting member for supporting the walkway is
Since it is fixed to the fixing flange via fasteners arranged at multiple locations in the circumferential direction, welding to the cast iron pipe only requires the fixing flange. The number of supporting members can be reduced and the supporting member can be attached to the receiving side. In this way, since the welded part to the cast iron pipe can be significantly reduced, it is possible to easily provide a cast iron pipe with a walkway that was conventionally shunned. Easy to do.

Further, due to the wind pressure received by the corridor, a rotational force that tends to rotate in the circumferential direction of the pipe acts on the support member,
Since the support member is fixed by fasteners at a plurality of positions in the circumferential direction, it can withstand a large rotational force.

[Brief description of the drawings]

FIG. 1 is a side view of a support member of a water pipe bridge with a walkway according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows AA in FIG.

FIG. 3 is an enlarged sectional view of a joint portion of a cast iron pipe.

FIG. 4 is a side view of an aqueduct with walkway.

[Explanation of symbols]

 1 Water pipe bridge 2 Ductile cast iron pipe 5 Corridor 6 Insert 7 Receptacle 19 Fixing flange 20 Receptacle side support member 25 Hexagon bolt (fastener) 26 Nut (fastener)

Claims (1)

[Claims] 1. A water pipe bridge composed of a plurality of cast iron pipes joined by inserting an insertion opening into a receiving opening, wherein a corridor along the pipe axis direction is arranged above the water pipe bridge, A fixing flange is provided on the outer peripheral surface of the receiving opening, and a supporting member for supporting the corridor is fixed to the fixing flange via fasteners arranged at a plurality of circumferential positions. Aqueduct with walkway.