JPH11351449A - Centering device for execution of piping work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a centering device for execution of piping work, capable of centering for connecting piping materials simple and appropriately in a short time even in a place being less in a working space in a sheath pipe or the like by a jacking method. SOLUTION: A centering device 1 comprises a base part 2a to be locked to a base 4, an adjustable jig 3 consisting of a pair of blocks 8a and 8b having both vertical and horizontal adjusting bolts 6a and 6b installed in this base part 2a, and a holder 10 having two tapered surfaces 9a and 9b sliding on tapered surfaces 7a and 7b of this adjusting jig 3 and holding a pipe body 11a, whereby centering work for connecting this pipe body 11 can be clone simply and appropriately in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centering device used for installing various pipes for electric cables, water supply and sewerage, and the like.

[0002]

2. Description of the Related Art The above-mentioned various pipes are laid over a long distance on the ground or underground, and are often laid underground for effective use of the above-ground parts.

Conventionally, a propulsion method has been widely used for laying pipes underground. In the propulsion method, the tip of the leading pipe penetrates the ground from the starting shaft to the reaching shaft,
Excavation is performed while cutting, and a propulsion pipe such as a fume pipe is propelled while adding a propulsion pipe at the rear end of the leading pipe to penetrate the horizontal shaft up to the reaching vertical shaft. At the time of propulsion, steel pipes or ductile pipes used for the above-mentioned various applications are drawn and laid in the propulsion pipe while being welded in the starting shaft.

In addition, a method is used in which a digging groove is dug around the place where the piping material is to be laid and around it, and the piping material is hung from the ground using a lifting machine such as a crane, positioned and piped. Have been.

However, in the case of piping by the propulsion method, in recent years, the distance between the starting shaft and the reaching shaft tends to be longer, and the horizontal shaft is not straight, but has more curved portions in the vertical and horizontal directions. I have. For this reason, it has become difficult to simultaneously draw in and lay steel pipes while welding the steel pipes and the like in the starting shaft during propulsion.

[0006] In the case of pipes with open cuts, there are existing structures that cannot be relocated to the ground at the place where they are laid, and a sufficient working space may not be obtained. In that case,
A piping material entrance limited to the above-ground part is provided, and from the entrance, excavation is performed in advance along the area where the piping material is laid, and each piping material is carried into the constructed underground space, from which the piping material is introduced. Is moved to a predetermined position and installed.

[0007] In the case of the above-mentioned propulsion method or piping using an open-cut groove, it is often inconvenient to move the piping material in a limited narrow place, to perform alignment at the time of connection, or to perform centering. Has been done.

As an example, Japanese Patent Application Laid-Open No. 8-244924 discloses a method of connecting long materials and a bogie used for the method. The above technology includes the following steps A, B, C, and D when connecting the second long material to the first long material installed in the installation space while aligning their axes. This is a method for connecting long materials.

(A) The second long material is placed on a pedestal of a bogie, and the bogie is moved so that an end of the second long material approaches an end of the first long material. The first step of moving.

(B) The cradle of the bogie is moved in at least one of the vertical and horizontal directions with respect to the first long material, so that the second long material with respect to the end of the first long material. A second step of aligning the ends of.

(C) A third step of temporarily connecting the end of the first long material and the end of the second long material by fastening means.

(D) After arranging the material receiver under the temporarily connected second long material, lowering the cradle of the carriage, the second long material is changed from the carriage to the material receiver. Fourth step.

[0013] In order to perform the second step, each of the pedestals is moved up and down between the pedestal on which the tubing material is mounted and the bogie main body to adjust the vertical position of the tubing material. A vertical moving mechanism including a hydraulic cylinder and the like is provided, and a lateral moving mechanism also including a hydraulic cylinder and the like for moving the bogie main body in the left-right direction is provided.

[0014]

However, when the technique described in Japanese Patent Application Laid-Open No. H8-244924 is directly used for piping such as a propulsion method, there are the following problems.

In the above technique, after the material receiver is arranged below the temporarily connected second long material, the cradle of the carriage is lowered, and the second long material is changed from the carriage to the material receiver. The fourth step is required, which complicates work in a narrow pipe such as a propulsion pipe, and requires time.

Further, in order to perform the second step, a vertical movement mechanism including a hydraulic cylinder and the like and a lateral movement mechanism also including a hydraulic cylinder and the like are provided between the pedestal on which the pipe material is placed and the bogie main body. Provided. At least four such moving mechanisms are required in front, rear, left and right, which is costly.

The present invention has been made to solve the above-mentioned problems, and can easily perform alignment and centering for connecting piping materials even in a place where the working space is small, such as inside a sheath pipe by a propulsion method. It is an object of the present invention to provide a centering device for piping construction that can be appropriately performed in a short time.

[0018]

According to a first aspect of the present invention, there is provided a centering device for piping when welding end faces of pipes, a base portion fixed to a base, and a vertical adjuster provided on the base portion. An adjusting jig comprising a pair of blocks having a bolt and a horizontal adjusting bolt and having a tapered surface facing each other, and a holding jig having a tapered surface that slides on the tapered surface of the jig and holding a pipe body. This is a centering device for piping construction.

According to a second aspect of the present invention, in the first aspect, the base portion is provided with a shoulder portion at the front and rear portions in the pipe axis direction, and the wheel device is detachably attached below the shoulder portion.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an embodiment of the present invention. The centering device 1 includes a base 2 fixed to a base 4.
a, a vertical adjusting bolt 5 and a horizontal adjusting bolt 6a, 6b provided on the base portion 2a.
b, an adjustment jig 3 comprising a pair of blocks 8a and 8b facing each other, and a holder 10 having tapered surfaces 9a and 9b sliding on the tapered surfaces 7a and 7b of the adjustment jig 3 and holding the tube 11a. It is composed of

Lower portions 13a, 13b of blocks 8a, 8b
Has a vertical adjustment bolt 5 and a horizontal adjustment bolt 6a,
6b is provided to adjust the alignment of the tube 11a.

The vertical adjustment bolt 5 is connected to the blocks 8a, 8
It is composed of a bolt 5a, a nut 5b, and a vertical positioning nut 5c that penetrate the lower portions 13a, 13b of b.

By rotating the bolt 5 from one side, the distance between the blocks 8a and 8b is lengthened or shortened. When the distance between the blocks 8a and 8b increases, the holder 10 holding the tube 11a moves down, and the tube 11a placed on the holder 10 is adjusted to a predetermined position vertically below. When the length is shortened, the holder 10 is raised, and the tube 11a placed on the holder 10 is adjusted to a predetermined position vertically above.

On the other hand, the horizontal adjustment bolts 6a and 6b maintain a state where the distance between the blocks 8a and 8b is constant after the pipe 11a is adjusted to a predetermined position in the vertical direction by the vertical adjustment bolt 5. Then, the horizontal position of the tube 11a is adjusted. The horizontal adjustment bolts 6a and 6b are fixedly supported on the upper side of the base 2a, respectively, and the tips of the horizontal adjustment bolts 6a and 6b are connected to the blocks 8a and 8b.
Of the lower part 13a, 13b. To move the blocks 8a, 8b to a predetermined position in the left horizontal direction, loosen the horizontal adjustment bolt 6a,
Tighten the horizontal adjustment bolt 6b. Blocks 8a, 8
To move b to a predetermined horizontal position on the right,
Perform the opposite operation. Horizontal adjustment bolts 6a, 6
A push plate (not shown) is attached to the end of b to facilitate adjustment of horizontal movement.

According to the above-described centering adjustment mechanism including the vertical adjustment bolt 5 and the horizontal adjustment bolts 6a and 6b, the structure of the tube 11a can be simply and surely adjusted.

The blocks 8a and 8b are composed of upper parts 12a and 12b.
Inner walls are formed as upper wide tapers 7a and 7b, and
Are also tapered surfaces 9a and 9b, and the holder 10 is fitted to the inner walls of the upper portions 12a and 12b of the blocks 8a and 8b.

It is preferable to apply Teflon to the contact surface between the adjusting jig 3 and the holder 10 in order to reduce frictional resistance. Further, it is preferable that the contact surface between the base portion 2a and the blocks 8a and 8b be laid with a metal material to make a metal touch so as to reduce frictional resistance.

Further, the holder 10 is provided so that the tube 11a can be stably mounted when the tube 11a is placed.
A concave portion 9c is provided in the lower part of the outer periphery of 1a so as to match with some allowance.

According to the above-described embodiment, the centering device 1 places the pipe 11a on it, and in a short time by a simple mechanical means using the vertical adjustment bolt 5 and the horizontal adjustment bolts 6a and 6b. Alignment, centering, and the like of the tube 11a can be appropriately performed.

Next, another embodiment of the base portion used in the present invention will be described. 2 is a front view of a base portion used in the present invention, FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB of FIG.

The base 2b has shoulders 14a, 14
b is provided, and the wheel device 15 is provided under the shoulders 14a, 14b.
a and 15b are detachably attached.

The wheel device 15a includes a wheel 16a and a wheel 16
a and a bearing 18a, 18b. Similarly, the wheel device 15b also includes a wheel 16b.
, A rotating shaft 17b, and bearings 20a and 20b.

The base 2b is provided with base projections 19a, 19b and base projections 25a, 25b at the bottoms on both sides below the shoulders 14a, 14b in order to detachably engage the wheel devices 15a, 15b. Bearings 18a,
18b and bearings 20a, 20b. Bearing 1
8a, 18b and bearings 20a, 20b are provided with bearing projections 22a, 22b and bearing projections 23a, 23b, each of which partially protrudes outward from both sides of the base 2b. 23a is integrally connected by a screw bolt jig 21a, and similarly, the bearing protrusion 22b and the bearing protrusion 23b are integrally connected by a screw bolt jig 21b.

The bearings 18a, 18b and the bearings 20a, 2
0b is fixed by the screw bolt jigs 21a and 21b, respectively, and the screw bolt jig 21
By operating a and 21b, the wheel device 15a and the wheel device 15b are detached from the front and rear portions of the base 2b. Reference numerals 24a and 24b denote handles, and reference numeral 26 denotes a handle.
a and 26b are nuts.

Next, a method of detaching the wheel device mounted on the base will be described. FIG. 5 is a side view taken along line CC of FIG. 2, and FIG. 6 is a view showing a detached state of the wheel device.

The wheel device 15a and the wheel device 15b are mounted below the shoulder 14a and the shoulder 14b of the base 2b, respectively. Since the detaching operation of the screw bolt jigs 21a and 21b is the same, the detaching operation of the screw bolt jig 21a on the side visible in the drawing will be described here.
The bearing 18a (18b) and the bearing 20a (20b) are composed of a base projection 19a (19b) and a base projection 25a.
(25b).

The bearing protrusions 22a (22b) and the bearing protrusions 23a (23b) are connected to the screw bolt jig 21a (21).
b) and the screw bolt jig 21a (21
b) is reverse screwed so that the handle 24a (24b) is simultaneously moved back and forth or approached by the operation of the handle 24a (24b).
The screw bolt jig 21a (21b) has a nut 26a (26b) at the end opposite to the handle 24a (24b).
b) is attached to prevent detachment.

The wheel device 15 mounted on the base 2b
a, when the wheel device 15b is detached, the bearing protrusion 22
a (22b) and the handle 24a (24b) of the screw bolt jig 21a (21b) engaged with the bearing protrusion 23a (23b) to operate the bearing protrusion 22a (22).
b) and the bearing protrusions 23a (23b) are moved back and forth as indicated by the arrows, and the integrally configured wheel device 15a and wheel device 15b are moved to the base protrusion 19a (19b) of the base 2b. Base projection 25a (25b)
Move outside.

The bearing projections 22a (22b) and the bearing projections 23a (23) are moved outward before and after the base 2b.
b) is the nut 2 on the bearing projection 23a (23b) side in advance.
6a (26b) is removed, the bearing protrusion 23a having a short moving length of the shaft of the screw bolt jig 21a (21b).
(23b) First, the screw bolt jig 21a (2
1b), the wheel device 15b is separated from the base 2b. On the other hand, the bearing protrusion 22a (22
The wheel device 15a integrated with b) is pulled out in front of the base 2b with the screw bolt jig 21a (21b) attached. As a result, the base 2b is connected to the wheel device 1
5a and 15b are placed on a base (not shown) in a detached state.

As shown in FIG. 1 described above, the tube 11a is held on the base 2b via the holder 10, and the wheels 16a and 16b of the wheel devices 15a and 15b are moved from the base 2b. By slightly protruding downward so as to be able to run, it is prevented from being affected by a step when the wheel devices 15a and 15b are disengaged.

When the base unit 2b shown in FIGS. 2 to 5 is used for the centering device 1, the wheel units 15a and 15b can be easily detached from the base unit 2b. After the alignment and centering are performed, it can be used as it is as a temporary support for the tube 11a. In general, the interval between the supports of the pipes is determined by the diameter of the pipes and the like.

Next, a case where the centering device 1 of the present invention is applied to piping in a horizontal shaft (sheath tube) by a propulsion method will be described.

FIG. 7 is a view showing a state in which the centering device 1 of the present invention is also used for transporting a pipe. The centering device 1 on which the pipe 11a is mounted is connected to the pipe construction moving cart 27 and moved. The moving body carriage 27 is a carriage provided with a drive mechanism 28, a welding mechanism 29, and an inspection mechanism 30 such as an X-ray apparatus. A tube 11a is mounted on the centering device 1.
The centering device 1 includes wheel devices 15a, 15b on the base 2b.
Is mounted, and is smoothly moved by the moving body 27 for pipe construction. Reference numeral 32 denotes a chain that suppresses movement due to vibration during transportation of the tube 11a.

The centering device 1 is provided with a pipe 11b
Stops where it can contact Therefore, the centering device 1 separates the wheel devices 15a and 15b from the base portion 2b while the tube 11a is mounted by the detaching operation of the wheel devices 15a and 15b as shown in FIGS. 5 and 6 described above. .

The pipe 11a is finely adjusted by the vertical adjustment bolt 5 and the horizontal adjustment bolts 6a and 6b of the centering device 1 as shown in FIG.
Alignment with b is performed appropriately. In this case, when fine adjustment in the pipe axis direction by the centering device 1 is necessary, the moving body truck 27 for driving the pipe body is driven to slide the base portion 2 b via the connecting rod 31. The frictional resistance between the base 2b and the base 4 is reduced by metal touch or the like. After that, when the positioning is completed, the rear end of the preceding pipe 11b and the front end of the pipe 11a are welded by the welding mechanism 29 mounted on the pipe construction moving carriage 27, and further mounted.
The inspection required for piping is performed by an inspection mechanism 30 such as an X-ray apparatus.

The centering device 1 on which the pipe 11a that has passed the piping work is mounted, as it is, as a support for the pipe 11a, and is fixed at that position by a fixture such as a bolt (not shown).

The pipe-building movable cart 27 is mounted with the removed wheel devices 15a and 15b, and is returned to the starting shaft in order to transport the next pipe. Then, the same operation is repeated to complete the construction of the pipe.

As described above, as shown in the other embodiments of FIGS. 2 to 6 described above, according to the centering device 1 of the present invention, the tube 11a is transported, and the wheel devices 15a and 15b are connected. Withdrawal, simple mechanical means, in a short time, properly,
Perform alignment and centering of the tube 11a,
It can be used as a temporary support for the tube 11a.

[0050]

According to the present invention, the centering for connecting the pipe members can be performed easily, in a short time, and appropriately even in a place where the working space is small, such as inside the sheath pipe by the propulsion method. Also,
Since the detachment of the wheel device can be easily performed from the base portion, the tube can be transported at the same time, and can be used as it is as a temporary support for the tube.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view of a base used in the present invention.

FIG. 3 is a view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a side view taken along line CC of FIG. 2;

FIG. 6 is a diagram showing a state in which the wheel device is detached from the base used in the present invention.

FIG. 7 is a view showing a state in which the centering device of the present invention is also used for transporting a pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Centering device 2a, 2b Base part 3 Adjusting jig 4 Base 5 Vertical adjusting bolt 6a, 6b Horizontal adjusting bolt 7a, 7b Tapered surface (adjusting jig) 8a, 8b Block (adjusting jig) 9a, 9b Taper Surface (holding tool) 10 Holding tool 11a, 11b Tube 12a, 12b Upper part (adjusting jig block) 13a, 13b Lower part (adjusting jig block) 14a, 14b Shoulder part 15a, 15b Wheel device 16a, 16b Wheel 17a, 17b Rotating shaft 18a, 18b, 20a, 20b Bearing 19a, 19b, 25a, 25b Base projection 21 Screw bolt jig 22a, 22b, 23a, 23b Bearing projection 24a, 24b Handle 26a, 26b Nut 27 Movement for pipe construction Dolly 28 Drive mechanism 29 Welding mechanism 30 Inspection mechanism such as X-ray apparatus 31 Connecting rod 3 Chain

Claims (2)

[Claims] An apparatus for centering a pipe when welding end faces of pipes, comprising: a base fixed to a base; a vertical adjustment bolt and a horizontal adjustment bolt provided on the base; An alignment jig comprising a pair of blocks whose surfaces are opposed to each other, and a holder for holding a pipe having a tapered surface that slides on the tapered surface of the jig. apparatus. 2. The centering device for piping construction according to claim 1, wherein the base portion has shoulder portions at front and rear portions in the pipe axis direction, and a wheel device is detachably attached below the shoulder portion. .