JP2001048485A - Piping jack-up device and jack-up method - Google Patents

Abstract

(57) [Problem] To provide a jack-up device capable of easily lifting a pipe in the presence of a support member thereof. SOLUTION: A support bar 6 arranged in parallel with a pipe section sandwiching a pipe section formed by covering a pipe section 1 with a heat insulating material 2 and an exterior plate 3 has a length capable of embracing the pipe section from below, and both ends. And a jack 8 arranged to lift the support bar 6 on a support structure 5 on which a support member 4 directly welded to a pipe is placed.
By combining the above, the pipe portion can be lifted together with the support member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe lifting mechanism required when performing maintenance or construction of a pipe having a heat retaining structure or a heat insulating structure, or a pipe supporting portion for supporting a pipe having a fireproof coating structure. In particular, the present invention relates to a jack-up device and a jack-up method for piping using a jack.

[0002]

2. Description of the Related Art In plant facilities and the like, there are piping facilities through which high-temperature fluid and low-temperature fluid flow. For example, a pipe through which a high-temperature fluid flows has a structure in which the circumference of the pipe is kept warm with a ceramic fiber heat insulating material or the like in order to maintain the temperature of the high-temperature fluid flowing inside the pipe.

A pipe through which a low-temperature fluid such as liquefied natural gas flows has a structure in which the circumference of the pipe is covered with a heat insulating material such as a rigid polyurethane foam in order to insulate the pipe from the surroundings.

[0004] Such a pipe is provided over several tens of meters to several hundreds of meters, and it is needless to say that a structure for partially supporting the pipe is required.

FIG. 3 is a schematic view of a support structure for a high-temperature fluid transport pipe. In the drawing, 1 is a pipe, 2 is a heat insulating material covering the circumference of the pipe, 3 is an outer plate made of a thin steel plate, 4 is a support member directly welded to the pipe, and 5 is an H supporting the support member.
It is a structure made of a shape steel.

[0006] Since the above-described high-temperature fluid transport pipe has to consider heat shrinkage, a structure that can absorb the expansion and contraction of the pipe due to the heat shrinkage is required at a supporting portion thereof.

For this reason, in the support structure shown in FIG. 3, the support member 4 directly welded to the pipe is simply placed on the structure 5 so that the support member 4 can move on the structure 5. The structure described above is adopted.

[0008]

In the pipe supporting structure shown in FIG. 3, it is necessary to lift the pipe a little for maintenance and heat insulation work. The following problems occur.

First Problem As shown in FIG. 3, when the pipe support 2 is arranged on the structure 3, a scaffold for jacking up the pipe from below cannot be secured.

[0010] The second problem is that the thickness of the piping including the heat retaining structure is various, and it is necessary to cope with them.

[0011] These problems can be similarly applied to a pipe having a cooling structure, and also to a pipe provided with a fireproof coating structure.

[0012] The present invention provides the above-mentioned pipe supporting structure,
It is an object of the present invention to provide a jacking-up device and a jacking-up method for a pipe in which the pipe can be lifted by a jack.

[0013]

A jack-up device for a pipe according to the present invention has a support bar arranged in parallel with the pipe with the pipe interposed therebetween, and a length capable of holding the pipe from below. The gist consists of a combination of a plurality of belts that can be hung on both support bars and jacks arranged to lift the respective support bars on the support structure of the pipe.

Further, according to the jacking method for a pipe of the present invention, there is provided a supporting bar arranged in parallel with the pipe with the pipe interposed therebetween;
A plurality of belts having a length capable of embracing the pipe from below, and both ends of which can be hung on the both support bars, and arranged to lift each of the support bars on the support structure of the pipe; It is a method of jacking up piping using jacks that are jacked up at the same time by jacking up the jacks that supported each support bar at its central part.
The gist is that a load of the pipe is applied to the belt suspended at both ends of the support bar to lift the pipe.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a preferred embodiment of the present invention, as shown in FIGS. 1 and 2, pipes 1 are parallel to each other with a pipe section covered with a heat insulating material 2 and an exterior plate 3 interposed therebetween. A support bar 6 to be arranged, two belts 7 having a length capable of holding the pipe portion from below, and both ends of which can be hung on the support bar 6, and a support member 4 directly welded to the pipe. The piping section is lifted together with the support member 4 by combining with the jack 8 arranged to lift the support bar 6 on the mounted support structure 5.

[0016]

1 and 2 show an embodiment of the present invention. The same or similar members as those in FIG. 3 are denoted by the same reference numerals.

That is, 1 is a pipe, 2 is a heat insulating material covering the circumference of the pipe, 3 is an exterior plate made of a thin steel plate, 4 is a support member directly welded to the pipe, and 5 is an H-shaped steel on which the support member is placed. It is a structure consisting of

FIG. 1 shows a state in which a pipe 1 covered with a heat insulating material 2 and an exterior plate 3 is lifted by a jack-up device.
FIG. 2 shows two metal supporting bars 6 and 6 constituting a jack-up device, and a wide and flexible 2 made of synthetic fiber.
The figure shows a state in which the belts 7, 7 and two jacks 8, 8 are combined.

In order to lift the pipe using the jack-up device having the above structure, two belts 7 having a length capable of embracing the pipe 1 covered with a heat insulating material and an outer plate from below are used.
7, the belts 7, 7 are hung by hanging the loop formed at the end thereof on both ends of two support bars 6, 6 arranged in parallel with the pipe with the pipe 1 interposed therebetween. And the jacks 8, 8 placed on the structure 5 on the support bars 6, 6
Apply to By operating the jacks 8, 8 in this state, the pipe 1 can be lifted. In that case, the jacks 8, 8 are balanced by lifting the center of the support bars 6, 6.

The support bar 6 and the jack 8 for lifting it shown in FIG. 1 are similarly arranged on the opposite side hidden by the pipe 1. Reference numeral 6a denotes a belt stopper provided at both ends of the support bar 6 to prevent the belt from shifting. Reference numeral 6b denotes a guide provided at the center of the support bar for positioning the jack. Naturally, the two jacks 8, 8 sandwiching the pipe need to be operated simultaneously.

According to the configuration of the jack-up device,
With the support structure 5 located in a shape orthogonal to the pipe 1 as a scaffold, the pipe (with a heat insulating material and an exterior plate) to which the support member 4 is welded can be easily lifted.

In this case, since the pipes are held by the flexible wide belts 8, the pipes can be easily adapted to those having different diameters. There is no risk of distortion.

In the above embodiment, two belts are used, but the number of belts may be further increased. By doing so, the local load on the exterior plate 3 can be reduced.

[0024]

As described in detail above, by applying the present invention, jacking-up of a pipe can be performed with a simple structure and at low cost. Specifically, (a) a pipe support structure extending in a direction perpendicular to the pipe can be used as a scaffold. Therefore, there is no need to provide a special scaffold. (B) Even if the structure of the outermost surface of the pipe portion is weak in strength, it can cope with it. (C) Various pipe diameters can be handled. (D) It can be widely used for lifting a pipe supporting portion of a pipe for transporting a high-temperature fluid or a low-temperature fluid or a pipe provided with a fireproof coating.

[Brief description of the drawings]

FIG. 1 is a perspective view of a piping jack-up device showing one embodiment of the present invention.

FIG. 2 is an assembled perspective view of members constituting the jack-up device.

FIG. 3 is a perspective view of a conventional supporting structure of a pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piping 2 Heat insulating material 3 Exterior plate 4 Piping support member 5 Structure 6 Support bar 6a Belt deviation preventing projection 6b Belt guide part 7 Support belt 8 Jack

Claims (3)

[Claims] 1. A plurality of belts having a support bar arranged in parallel with the pipe with the pipe interposed therebetween and having a length capable of holding the pipe from below, and both ends of which can be hung by the support bars. And a jack arranged to lift each of the support bars on the support structure of the pipe. 2. The jack-up device for a pipe according to claim 1, wherein the support structure is a steel material arranged perpendicular to the pipe. 3. A plurality of belts having a length capable of embracing the pipe from below, and having both ends capable of being hung on the two support bars, respectively. And a jack arranged to lift each of the support bars on the support structure of the pipe, wherein the jacks supporting the support bars at their central portions are simultaneously jacked. A pipe jacking-up method, wherein the pipe is lifted by applying a load of the pipe to a belt suspended at both ends of the support bar, thereby lifting the pipe.