JPH09105111A - Water pipe bridge with walkway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water pipe bridge which is formed by the connection of a plurality of cast iron pipes and provided with a walkway without welded parts. SOLUTION: In a water pipe bridge constituted of a plurality of cast iron pipes connected by inserting the insertion opening 6 into the receive opening 7, a seal material is fitted between the inner periphral face of the receive opening 7 and the outer peripheral face of the insertion opening 6 and a pushing ring 15 pressing the seal material to the insertion direction of the insertion opening 6 is fitted into the insertion opening 6 from the outside. Stud bolts 16 and nuts 17 pulling the pushing ring 15 toward the insertion direction the insertion opening 6 are provided at a plurality of peripheral positions of the end face of the receive opening 7. A walkway 5 is arranged along the axial direction of the pipes. Support members 19 of the receive opening side supporting the walkway 5 are fixed to the end face of the receive opening 7 by a plurality of stud bolts 16 and nuts 17.

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 is to provide a water pipe bridge formed by joining a plurality of cast iron pipes and provided with a walkway without welding to the cast iron pipes. It is what

[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, an annular sealing material is fitted between the inner peripheral surface of the opening of the receiving port and the outer peripheral surface of the insertion port,
A push ring that presses the sealing material in the insertion direction of the sealing member is externally fitted to the insertion port, and a plurality of fasteners for pulling the push ring in the insertion direction of the insertion port are provided at a plurality of circumferential positions of the end surface of the reception port, and the water pipe A walkway along the pipe axis direction is arranged above the bridge, and a supporting member for supporting the walkway is fixed and attached to the joint portion of the cast iron pipe by the plurality of fasteners. It is a thing.

According to this, since the supporting member for supporting the corridor is fixed to the joint portion of the cast iron pipe by being fixed by a plurality of fasteners, the supporting member is attached to the joint portion of the cast iron pipe without welding. be able to. Further, due to the wind pressure received by the corridor, a rotational force that tries to rotate in the circumferential direction of the pipe acts on the support member, but since the support member is fixed by a plurality of fasteners in the circumferential direction, it can withstand a large rotational force. be able to.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG.
Reference numeral 1 denotes a water pipe bridge laid over a river or the like, and is composed of a duct 3 having a gentle curvature in which a plurality of ductile cast iron pipes 2 are joined. 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 thereof. 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, an annular rubber ring 9 (sealing material) is formed. Example)
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 circumference of the tip of the insertion opening 6, a projection 13 is formed over the entire circumference, which engages with the lock ring 11 in the tube axial direction and prevents the insertion opening 6 from being separated from the receiving opening 7.

A rubber ring 9 is inserted into the insertion opening 6 through a split ring 14.
A push wheel 15 that presses in the insertion direction of the insertion slot 6 is externally fitted. At a plurality of circumferential positions on the end surface of the receiving port 7, there are provided studs 16 (an example of fasteners) and nuts 17 (an example of fasteners) that pull the push ring 15 toward the insertion direction of the insertion port 6. By tightening these nuts 17, the push ring 15 moves in the insertion direction of the insertion slot 6, and thus the rubber ring 9 is pressed through the split ring 14 in the insertion direction of the insertion slot 6.

At the joint portion of the ductile cast iron pipe 2, a receiving side supporting member 19 for supporting the walkway 5 from the receiving port 7 side is fixed and fixed by the plurality of stud bolts 16 and nuts 17. ing. That is, the receiving side support member 19,
An annular support flange 20 that is applied to the end face of the socket 7.
A support plate 21 welded to the outer peripheral surface of the upper half of the support flange 20 and formed wider toward the upper part;
The angle members 22 provided on both sides of the upper surface of the 21 and the support plate 21
And side support plates 23 which are provided on both sides of the upper part and are formed wider toward the tube axis direction toward the upper part.

The mounting of the support flange 20 is as follows.
As shown in FIG. 3, the stud bolt 16 is formed with a large body portion 16a having a large diameter. By screwing the stud bolt 16 into the receiving port 7, the thick body portion 16a and the receiving port 7 are formed. The support flange 20 is fixed between the end face and the end face. Further, as shown in FIG. 2, the angle member 22 and the side support plate 23 are integrally welded to each other via a mounting plate 24.
The angle member 22 and the side support plate 23 are attached to the support plate 21 by connecting and fixing to the support plate 21 with the nut 25.

The walkway 5 is a walk board 27 on which an operator walks.
And a side frame 29 having a handrail 28. The step board 27 is divided into a plurality of pieces in the tube axis direction, and is supported between the angle members 22 on both sides and fixed by bolts 42. On the lower portion of the step board 27, a convex portion 27a which can be freely inserted and removed between the angle members 22 on both sides is formed. Also,
The side frame 29 is divided into a plurality of pieces in the pipe axis direction, and an end portion of one side frame 29 and an end portion of the other side frame 29 which are adjacent to each other are connected to the angle member 22 via a bolt 30 and a nut 31. Fixed. The above bolt 30
The bolt holes 32 of the side frame 29 through which the holes are inserted are formed as long holes that are long in the pipe axis direction.

Further, as shown in FIG. 1, the insertion opening side support member 34 for supporting the walkway 5 is also provided in the insertion opening 6.
The insertion side support member 34 is composed of a support plate 35, an angle member 36, and a side support plate 37, like the reception side support member 19, and the support plate 35 is externally fitted to the insertion port 6. Welded to a steel mounting band 38. The mounting band 38 has a structure in which it is divided into two in the circumferential direction, and a bolt 39 and a nut 40
It is attached by pinching the outer peripheral surface of the insertion opening 6 with. A rubber plate 41 is provided between the mounting band 38 and the insertion opening 6.
Is caught in.

The operation of the above configuration will be described below.
According to this, the receiving-side support member 19 that supports the corridor 5 is fixed to the receiving port 7 of the ductile cast iron pipe 2 by being fixed by the plurality of studs 16 and nuts 17, so that welding is not performed. The receiving side support member 19 can be attached to the receiving port 7. Similarly, since the insertion side support member 34 is fixed by the attachment band 38 and attached to the insertion port 6 of the ductile cast iron pipe 2, the insertion side support member 34 should be attached to the insertion port 6 without welding. You can As a result, the ductile cast iron pipe 2
Since the corridor 5 can be easily provided without welding, the inspection of the water pipe bridge 1 including the ductile cast iron pipe 2 can be easily performed using the corridor 5.

Further, due to the wind pressure received by the corridor 5, a rotational force that tends to rotate in the circumferential direction of the pipe 2 acts on the receiving-side support member 19, but the receiving-side support member 19 has a plurality of circumferentially-arranged plants. Since it is fixed by the built-in bolt 16 and the nut 17, it can withstand 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 bolt hole 32. Therefore, the movement of the insertion opening 6 in the tube axis direction can be absorbed.

Next, a second embodiment of the present invention will be described with reference to FIGS.
It will be described with reference to FIG. As shown in FIG. 7, at the joint portion of the ductile cast iron pipe 2, a tapered surface 50 is formed over the entire circumference on the inner peripheral surface of the opening of the receiving port 7.
An annular rubber ring 51 (an example of a sealing material) is fitted between the 50 and the outer peripheral surface of the insertion port 6. In addition, a lock ring accommodation groove 52 is formed on the inner peripheral surface of the receiving port 7 and behind the tapered surface 50.
A lock ring 53 having a split structure, which is cut at one location in the circumferential direction, is fitted. Above lock ring 53 and rubber ring
A backup ring 54 is externally fitted to the insertion opening 6 with respect to 51. A lock ring is provided on the outer periphery of the tip of the insertion slot 6.
A projection 55 is formed over the entire circumference to engage with 53 in the tube axial direction and prevent the insertion opening 6 from being separated from the receiving opening 7.

A push ring 56 for pressing the rubber ring 51 in the insertion direction of the insertion hole 6 is externally fitted to the insertion hole 6. This push ring 56
Has a half-split structure with a semicircular upper push ring piece 56a and a lower push ring piece 56b that are divided in two in the circumferential direction. At a plurality of positions in the circumferential direction of the receiving flange 57 formed at the end of the receiving port 7, the push ring 56 is pulled in the insertion direction of the insertion port 6
A head bolt 58 (an example of a fastener) and a nut 59 (an example of a fastener) are provided. By tightening these nuts 59, the push ring 56 moves in the insertion direction of the insertion port 6, and the rubber ring 51 is pressed in the insertion direction of the insertion port 6.

At the joint of the ductile cast iron pipe 2, a receiving side supporting member 61 for supporting the walkway 5 is fixedly attached by the plurality of T-head bolts 58 and nuts 59. That is, the socket side support member 61 is a socket flange.
A semi-circular support flange 62 that is applied to the back surface of the upper half of the 57, and the same support plate 21 as in the first embodiment described above.
And an angle member 22 and a side support plate 23.
Reference numeral 34 is an insertion side support member that supports the corridor 5, and is the same as that of the first embodiment described above.

According to this, since the receiving port side supporting member 61 is fixed to the receiving port 7 of the ductile cast iron pipe 2 by being fixed by the plurality of T-head bolts 58 and the nut 59, the receiving port side supporting member 61 is not welded but is received. The mouth side support member 61 can be attached to the receptacle 7. Thereby, since the corridor 5 can be easily provided without welding to the ductile cast iron pipe 2, the inspection of the water pipe bridge 1 including the ductile cast iron pipe 2 can be easily performed by using the corridor 5.

Further, due to the wind pressure received by the corridor 5, a rotational force that tends to rotate the receiving side support member 61 in the circumferential direction of the pipe 2 acts, but the receiving side support member 61 has a plurality of circumferential T-shaped members. Since it is fixed by the head bolt 58 and the nut 59, it can withstand a large rotational force.

Next, a third embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. That is, the joint structure of the ductile cast iron pipe 2 in the third embodiment is almost the same as that in the first embodiment described above. That is, although the stud bolt 16 having the thick body portion 16a is used in the first embodiment (see FIG. 3), in the third embodiment, as shown in FIG. Common stud bolt 70 with the same diameter
(An example of a fastener) is used. Also, the receiving side support member
71 is composed of a push ring 15, a support plate 72 welded to the outer peripheral surface of the upper half of the push ring 15, the same angle member 22 and side support plate 23 as in the first embodiment described above. ing. Reference numeral 34 is an insertion side support member that supports the corridor 5, and is the same as that of the first embodiment described above.

According to this, since the receiving port side supporting member 71 is fixed to the receiving port 7 of the ductile cast iron pipe 2 by being fixed by the plurality of stud bolts 70 and the nut 17, the receiving port side supporting member 71 is not welded. The mouth side support member 71 can be attached to the receptacle 7. Thereby, since the corridor 5 can be easily provided without welding to the ductile cast iron pipe 2, the inspection of the water pipe bridge 1 including the ductile cast iron pipe 2 can be easily performed by using the corridor 5.

Further, due to the wind pressure received by the corridor 5, a rotational force for rotating the receiving side support member 71 in the circumferential direction of the pipe 2 acts, but the receiving side support member 71 has a plurality of circumferentially arranged plants. Since it is fixed by the built-in bolt 70 and the nut 17, it can withstand a large rotational force.

Further, since the push ring 15 for pushing the rubber ring 9 in the insertion direction of the insertion slot 6 is also used as a part of the receiving side support member 71, the first and second embodiments described above are provided. Since the support flanges 20 and 62 (see FIGS. 1 and 5) in FIG. 2 are unnecessary, the number of parts can be reduced.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. Fourth of the implementation as shown in FIG.
The joint structure of the ductile cast iron pipe 2 in the above embodiment is almost the same as that of the second embodiment described above (see FIG. 7). That is, the receiving side support member 80 includes a push ring 56 having a split structure, a support plate 81 welded to the outer peripheral surface of the upper push ring piece 56a of the push ring 56, and the same angle as in the first embodiment described above. It is composed of a member 22 and a side support plate 23. Reference numeral 34 is an insertion side support member that supports the corridor 5, and is the same as that of the first embodiment described above.

According to this, since the receiving port side supporting member 80 is fixed to the receiving port 7 of the ductile cast iron pipe 2 by being fixed by the plurality of T-head bolts 58 and nuts 59, the receiving port side supporting member 80 is not welded but is received. The mouth side support member 80 can be attached to the receptacle 7. Thereby, since the corridor 5 can be easily provided without welding to the ductile cast iron pipe 2, the inspection of the water pipe bridge 1 including the ductile cast iron pipe 2 can be easily performed by using the corridor 5.

Further, due to the wind pressure received by the corridor 5, a rotational force that tends to rotate in the circumferential direction of the pipe 2 acts on the receiving side supporting member 80, but the receiving side supporting member 80 has a plurality of T in the circumferential direction. Since it is fixed by the head bolt 58 and the nut 59, it can withstand a large rotational force.

Further, since the push ring 56 for pushing the rubber ring 51 in the insertion direction of the insertion slot 6 is also used as a part of the receiving side support member 80, the first and second embodiments described above are provided. Since the support flanges 20 and 62 (see FIGS. 1 and 5) in FIG. 2 are unnecessary, the number of parts can be reduced.

[0031]

As described above, according to the first aspect of the present invention, the supporting member for supporting the walkway is fixed to the joint portion of the cast iron pipe by being fixed by a plurality of fasteners. Therefore, the support member can be attached to the joint portion of the cast iron pipe without welding. This makes it possible to easily install a walkway, which has been away from the cast iron pipe, without welding, so that the water pipe bridge made of the cast iron pipe can be easily inspected using this walkway.

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 a plurality of fasteners 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 a first embodiment of the present invention.

FIG. 2 is a front view of a support member of the water pipe bridge with a walkway.

FIG. 3 is an enlarged cross-sectional view of a joint portion of a cast iron pipe of the water pipe bridge with a walkway.

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

FIG. 5 is a side view of a support member for a water pipe bridge with a walkway according to a second embodiment of the present invention.

FIG. 6 is a front view of a support member of the water pipe bridge with a walkway.

FIG. 7 is an enlarged cross-sectional view of a joint portion of a cast iron pipe of the water pipe bridge with a walkway.

FIG. 8 is a side view of a support member of a water pipe bridge with a walkway according to a third embodiment of the present invention.

FIG. 9 is a front view of a support member of the water pipe bridge with a walkway.

FIG. 10 is an enlarged cross-sectional view of a joint portion of a cast iron pipe of the water pipe bridge with a walkway.

FIG. 11 is a side view of a support member of a water pipe bridge with a walkway according to a fourth embodiment of the present invention.

FIG. 12 is a front view of a support member of the water pipe bridge with a walkway.

FIG. 13 is an enlarged cross-sectional view of a joint portion of a cast iron pipe of the water pipe bridge with a walkway.

[Explanation of symbols]

 1 water pipe bridge 2 ductile cast iron pipe 5 corridor 6 insertion opening 7 receiving opening 9 rubber ring (sealing material) 15 push ring 16 stud bolt (fastening tool) 17 nut (fastening tool) 19 receiving side support member 51 rubber wheel (sealing material) ) 56 Push ring 58 T-head bolt (fastener) 59 Nut (fastener) 61 Receiving side support member 70 Implant bolt (fastener) 71 Receiving side supporting member 80 Receiving side supporting member

Claims (1)

[Claims] 1. In a water pipe bridge composed of a plurality of cast iron pipes joined by inserting an insertion opening into the receiving opening, between the inner peripheral surface of the opening of the receiving opening and the outer peripheral surface of the insertion opening, Insert a ring-shaped sealing material, fit a push ring that presses the sealing material in the insertion direction of the insertion hole to the above-mentioned insertion port, and pull the pushing ring toward the insertion direction of the insertion port at multiple points in the circumferential direction of the end face of the reception port. A fastener is provided, a walkway along the pipe axis direction is arranged above the water pipe bridge, and a support member for supporting the walkway is fixed to and attached to the joint portion of the cast iron pipe by the fasteners. A water pipe bridge with a walkway.