JPH078341Y2 - Rolled steel pipe carrier in the existing pipeline - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a trolley for transporting steel pipes in an existing pipeline used for rehabilitation work of an existing aged pipe.

[Conventional technology]

There are various construction methods for rehabilitating an old pipe that has deteriorated. Among them, there is a construction method that uses a rolled-in steel pipe as a means of exerting a reinforcing effect while hardly impairing the water passage section of the existing pipe.

In this method, the tubular body is overlapped in the circumferential direction over a predetermined width to reduce the diameter, and the rolled steel pipe having a diameter smaller than the inner diameter of the existing pipeline is transported in the existing pipeline and wound at a predetermined position. The steel pipe is expanded, welding is performed in the pipe axial direction and the circumferential direction, and a new pipe having substantially the same diameter is arranged in the existing pipeline.

Conventionally, when moving the rolled steel pipe in this method,
A height adjustment jack is provided on the front and rear of the bogie body, and a rolled steel pipe is mounted on this jack, and the height is adjusted so that the bottom of the rolled steel pipe does not come into contact with the existing pipe. I was moving.

[Problems to be solved by the device]

However, in the case of the conventional rolled-in steel pipe carrier in the existing pipeline, since only the height direction could be adjusted, the horizontal curved portion of the existing pipeline or the pipe caused by ground subsidence after the laying of the existing pipeline, etc. When passing through the uneven part in the vertical direction, the height of the rolled steel pipe is adjusted by the jack while moving the bogie main body laterally in the existing pipeline. You have to move it so it doesn't touch the wall,
Therefore, the work was complicated.

In addition, the reduced diameter shape of the rolled steel pipe during transportation in the existing pipeline is
As shown in the figure, the outer portion of the overlapping portion is protruding, and the diameter D ₁ on the protruding portion side is the diameter D _{2 at} the position orthogonal to this.
Since it is larger than the above, the bounce part was an obstacle during transportation of the rolled steel pipe.

Therefore, by increasing the overall diameter reduction amount of the rolled steel pipe and increasing the overlapping width to reduce both D ₁ and D ₂ , the space between the rolled steel pipe and the existing pipeline can be expanded, It was necessary to transport the rolled steel pipe into a short pipe. But,
If the amount of diameter reduction is increased too much, when the pipe is expanded, local deformation occurs and the roundness decreases, and it becomes difficult to perform the diameter reduction and expansion work.If the length is shortened, the number of ring joints in the pipe axial direction increases. There is a drawback that the construction period becomes longer and it becomes uneconomical.

It is an object of the present invention to solve these problems and to provide a carrier for a rolled-in steel pipe that can smoothly pass through a horizontal bend or an uneven portion of an existing pipeline.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the rolling steel pipe carrier in the existing pipeline of the present invention, the lateral moving device 20 is attached to the front and rear portions of the carriage main body 10 traveling in the existing pipeline 1. A height adjusting jack 26 is provided, and a pipe supporting member 27 is fixed to the upper portion of the jack 26.
A plurality of rollers 28, which support the inner surface of the upper part of the rolled steel pipe 2 and are rotatable in the circumferential direction, are attached to the 27.

[Action]

While adjusting the pipe support part of the carrier truck that moves while supporting the upper inner surface of the rolled-in steel pipe 2 vertically and horizontally with respect to the carriage body 10, while adjusting the inside and the inside of the existing pipeline 1 to the existing position, By supporting with a plurality of rollers 28 so that the rolled-in steel pipe 2 can be moved in the pipe line 1 and can be rotated in the circumferential direction, the position where the rolled-up portion 3 of the rolled-in steel pipe is unwound can be freely set. It can be changed so that it can run smoothly on the horizontal bends and uneven parts of the existing pipeline.

〔Example〕

1 to 3 show a rolled-up steel pipe carrier in an existing pipeline according to an embodiment of the present invention.

The rolled-in steel pipe carrier cart includes a carriage body 10, a lateral movement device 20 provided at the front and rear portions of the carriage body 10, and a height adjusting jack mounted on the lateral movement device 20.
The truck main body 10 is connected to the drive vehicle 16 and travels in the existing pipeline 1 by means of a pipe support member 27 fixed to the upper portion of the jack 26.

The bogie main body 10 is attached to the wheel support frame member 12 having a downward opening groove shape fixed to the penetration portion in the rolled-in steel pipe 2 and the wheel shafts 13 at the lower portions on both left and right sides of the wheel support frame member 12. It is constituted by wheels 14 and a driving wheel 16 is connected to one end of the beam 11 by a connecting member 15 so that the truck main body 10 travels in the existing pipeline 1.

In addition, the carriage main body 10 has a lateral movement device described later.
Since the eccentric load may be loaded by the movement of 20,
It is necessary to widen the width of the beam 11 and the space between the left and right wheels 14 to enable stable traveling.

The lateral movement device 20 includes a pedestal 21 having a trapezoidal groove 5 which is fixed on the beam 11 by a bolt nut 4 and extends in the left-right direction, a pedestal 25 having a trapezoidal protrusion 6 at the lower portion, and a left-right A trapezoidal protrusion 6 is slidably fitted in the trapezoidal groove 5, and an intermediate portion of the trapezoidal rod 23 is screwed into a female screw hole provided in the seat 25. Both ends of the screw rod 23 are rotatably supported by bearing members 22 fixed to both ends of the pedestal 21, and further, a turning operation handle 24 is attached to the end of the screw rod 23. When the handle 24 is rotated, the seat 25 is moved in the left-right direction and the position of the seat 25 is adjusted.

A lower end portion of a height adjusting jack 26 is fitted and fixed in a concave portion provided in an upper portion of a receiving seat 25 in the lateral movement device 20, and is wound around an upper end portion of a piston rod or a plunger of the jack 26. A pipe support member 27 that supports the upper portion of the steel pipe 2 is fixed, and rollers 28 that rotate around a support shaft 7 parallel to the beam 11 are attached to the left and right sides of the upper portion of the pipe support member 27. The upper part of the pipe 28 protrudes upward from the upper end of the pipe support member 27, and the inner surfaces of the upper parts of both ends of the rolled steel pipe 2 are supported by two rollers 28, respectively, so that the rolled steel pipe 2 can be rotated in the circumferential direction. it can.

Next, the operation of transporting the rolled-up steel pipe 2 in the existing pipeline 1 using the rolled-up steel pipe carrier of the present invention will be described.

First, in order to mount the rolled-in steel pipe 2 on the carrier truck, the wheels 14 at the front or rear of the truck main body 10 are moved and passed through the rolled-in steel pipe 2 in a state where the stroke of the jack 26 is shortened. The beam 11 is penetrated into the steel pipe 2, and then both jacks 26 are extended so that the jacks 26 can support the pipe support member.
Lift up the rolled steel pipe 2 via 27 and roller 28,
An appropriate clearance is provided between the lower portion of the rolled steel pipe 2 and the inner surface of the lower portion of the existing pipeline 1.

In this state, the truck body 10 is pulled or moved by the drive vehicle 16 connected to the front end portion or the rear end portion of the truck body 10 to convey the rolled steel pipe 2 along the existing pipeline 1. To go.

When the existing pipeline 1 is in a straight line state, the posture shown in FIG. 1, that is, the overlapping portion 3 of the rolled-in steel pipe 2 is positioned below, and the receiving seat 25 of the jack 26 is arranged at the center in the left-right direction. The rolled-in steel pipe 2 can be transported.

In addition, if there is an uneven portion (unevenness) in the existing pipeline 1,
By adjusting the height and the lateral position of the rolled steel pipe 2 by expanding and contracting the jack 26 and moving the lateral moving device 20, it is possible to prevent the rolled steel pipe 2 from colliding with the existing pipeline 1, and According to the above, the steel pipe 2 in which the overlapping portion 3 is rolled up
The rolled steel pipe 2 is rotated in order to move in the circumferential direction of.

4 and 5 show a state in which the rolled-in steel pipe 2 passes through the horizontal bend portion of the existing pipeline 1.

At the horizontal bend of the existing pipeline 1, a straight space corresponding to the length of the rolled-in steel pipe 2 is sandwiched by the pipe inner walls having a horizontal bend angle E, and the center of the straight space is deviated from the center of the bogie body 10. It will be.

Therefore, the carriage body 10 supporting the rolled-in steel pipe 2
Even if the horizontal bend portion of the existing pipeline 1 is made to travel in the same manner as the straight portion, the side surface of the rolled-in steel pipe 2 interferes with the horizontal bend portion of the existing pipeline 1 so that it cannot be run. For this reason, when traveling on the horizontal bend of the existing pipeline 1, the lateral moving device 20 moves the rolled-up steel pipe 2 to the side that does not interfere with the existing pipeline 1 (direction of arrow A in FIG. 5) before traveling. Let

Since the linear space is an ellipse that is wide in the vertical direction,
The rolled-up steel pipe 2 is transported with the overlapping portion 3 arranged on the lower side.

6 and 7 show a state in which the rolled-in steel pipe 2 passes through the vertical bending portion of the existing pipeline 1.

In the vertical bending portion of the existing pipeline 1, the vertical bending angle F of the existing pipeline 1 causes the straight space corresponding to the length of the rolled-in steel pipe 2 to be sandwiched in the vertical direction, as in the case of the horizontal bending portion. It becomes a wide ellipse in the direction. Therefore, the rolled steel pipe 2
When transporting, the jack 26 is arranged at the center of the pedestal 21 in the left-right direction, and the jack 26 is extended to move the rolled steel pipe 2 upward (moved in the direction of arrow B). 2 is rotated in the direction of arrow C by about 90 ° to arrange the overlapping portion 3 in the lateral direction, and in this state, the trolley body 10 is run to carry the rolled-in steel pipe 2.

As a means for rotating the rolled-up steel tube 2, a means for gripping both ends of the rolled-up steel tube 2 by input and rotating the rolled-up steel tube 2 may be adopted. 8 is fixed by welding, and a lever swing type traction machine (product name: lever block) 29 is engaged with the support metal fitting 9 fixed to the pipe support material 27 and the locking metal fitting 8, and the lever swing type traction is performed. A means for rotating the rolled-in steel pipe 2 by operating the machine 29 may be adopted. Furthermore, a drive device for rotating the roller 28 may be attached to the pipe support member 27, and a means for rotating the rolled steel pipe 2 by the rotation of the roller 28 may be adopted.

After the rolled-up steel pipe 2 is rotated so that the overlapping portion 3 is located in the lateral direction, the rolled-up steel pipe 2 is held by using a lever swing type traction machine in order to hold the rolled-up steel pipe 2 so as not to reverse. If 2 is turned, do not remove the traction machine after turning. When the rolled steel pipe 2 is rotated by other means, the support metal fitting 9 fixed to the pipe support member 27 and the locking metal fitting 8 fixed to the inner surface of the end of the rolled steel pipe 2 are connected by a rope or a chain. Connect it.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

Height adjustment jacks 26 supported by a lateral movement device 20 so as to be laterally movable are provided at front and rear portions of a carriage main body 10 that travels in the existing pipeline 1.
A plurality of rollers for supporting the inner surface of the upper part of the rolled-in steel pipe 2 on a pipe supporting member 27 fixed to the upper part of 26 so as to be rotatable in the circumferential direction.
Since 28 is attached, even if the existing pipeline 1 has a horizontal bend or uneven portion, it is possible to freely adjust the horizontal position and the vertical position of the rolled steel pipe 2 with respect to the carriage body 10. And the position of the overlapping portion 3 in the rolled-in steel pipe 2 can be freely adjusted in the pipe circumferential direction,
Therefore, the rolled-in steel pipe 2 can be supported by the carriage to be transported in the existing pipeline 1 without bearing.

[Brief description of drawings]

1 to 3 show a rolled-up steel pipe carrier in an existing pipeline according to an embodiment of the present invention. FIG. 1 is a partially longitudinal front view, and FIG. 2 is a longitudinal sectional view of FIG. FIG. 3 is a vertical sectional side view showing a part of FIG. 2 in an enlarged manner. FIG. 4 is a schematic plan view showing a state in which the carrier truck supporting the rolled-in steel pipe travels on the horizontal bend portion in the existing pipeline,
FIG. 5 is an enlarged cross-sectional view taken along the line II-II of FIG. 4, and FIG. 6 is a schematic side view showing a state in which a carrier supporting a rolled-in steel pipe travels along a vertical bend in an existing pipeline, FIG. 7 is an enlarged sectional view taken along line III-III in FIG. 6, and FIG. 8 is a diagram showing a sectional shape of the rolled steel pipe. In the figure, 1 is an existing pipeline, 2 is a rolled-in steel pipe, 3 is an overlapping portion, 5 is a trapezoidal groove, 6 is a trapezoidal protrusion, 8 is a locking metal fitting, 9
Is a support metal fitting, 10 is a carriage main body, 11 is a beam, 12 is a wheel supporting frame member, 14 is a wheel, 15 is a connecting member, 16 is a driving vehicle, 20 is a lateral moving device, 21 is a pedestal, 22 is a bearing member, Reference numeral 23 is a moving screw rod, 24 is a rotation operation handle, 25 is a seat, 26 is a height adjusting jack, 27 is a pipe support member, 28 is a roller, and 29 is a lever swing type traction machine.

Front page continuation (72) Inventor Takeshi Ito 2-3-6 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (72) Inventor Kiyomi Fukumori 2-3-6 Otemachi, Chiyoda-ku, Tokyo New Japan Steelmaking Co., Ltd. (72) Inventor Masaharu Kaneko 2-6-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Co., Ltd. (56) Reference JP-A-63-125879 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A height adjusting jack 26 attached to a lateral movement device 20 is provided at a front portion and a rear portion of a bogie main body 10 that travels in an existing pipeline 1, and a pipe is provided above the jack 26. A support member 27 is fixed, and this pipe support member 27 supports the inner surface of the upper part of the rolled-in steel pipe 2 and is provided with a plurality of rollers 28 rotatable in the circumferential direction. Rolled steel pipe carrier truck.