JPS5914059Y2 - Centering device that also transports pipe bodies - Google Patents

Description

[Detailed description of the invention] This invention is a pipe centering device that is used for underground piping work, especially piping work in narrow places such as crawl spaces, and for centering the welding groove of the pipe. Regarding.

Conventionally, centering devices that also serve as pipe transport have generally been equipped with an adjustment table and an adjustment stand installed near both ends of the pipe in the axial direction to perform up/down and left/right adjustment of the pipe axis. It consists of a moving trolley.

However, in a work environment where the place of use is narrow, such as in a private canal with ups and downs and curves, the tube body is installed so that it is located at the center of the cross section of the canal, so the device is equipped with a left and right adjustment mechanism for the tube axis. If the space for installing the pipe is limited and the equipment does not have an adjustment mechanism, or if it is equipped but has a small adjustment range that combines screws and slides, the actual centering work may be carried out after the pipe is transported to the installation location. This was carried out using separately prepared lifting and hanging jigs, hydraulic cylinders, etc., which resulted in a decrease in work efficiency and often led to unsafe work conditions.

Moreover, when the pipe diameters differ, a device suitable for the pipe diameter must be prepared separately each time, which is uneconomical.

Furthermore, when transporting pipes with different end sizes, such as reducer pipes (tapered pipes), it is necessary to devise an installation method to stabilize the pipes, and centering must be performed using a separately prepared jig. did not become.

Furthermore, when welding a tube inside the private canal, a backing metal is often used at the groove on the outer surface of the tube, and internal welding is often performed.

When installing the backing metal, there is little space between the guide and the pipe body, and for work safety reasons, it is not possible to enter the space.

In this case, it is possible to install a backing metal around the entire circumference of either the existing pipe or the pipe to be transported in advance, but centering would be extremely difficult due to distortion of the pipe body and dimensional tolerances. Become.

Therefore, centering is performed after attaching a backing metal to the semicircumference of each of the existing pipe and the pipe to be transported.

At this time, it is necessary to adjust the rotation of the tube in the circumferential direction so that the backing metals do not overlap, but conventional devices do not have this rotating mechanism, so adjustment requires a lot of effort and time. .

That is, when adjusting the rotation in the horizontal direction with respect to the axial direction of the tube, the contact portion that holds the tube receives rotational force, making it difficult to adjust.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an apparatus which eliminates the various drawbacks of the prior art, and which can transport a buried pipe and center the welding groove thereof simply and reliably.

The present invention will be described in detail below with reference to the accompanying drawings.

In the figure, 1 is a pipe body to be transported and centered, 2, 2 is a set of moving tables connected by two connecting pipes 3.3 whose lengths are adjustable parallel to the pipe axis, and the interval between them is The intervals can be adjusted to suit the length of the body 1.

Reference numeral 25.25 denotes wheels attached to the lower part of each moving platform 2, 2, and each moving platform 2, 2 can be moved forward and backward in equiaxial directions on rails 27.27 by a drive motor (not shown).

Reference numerals 4, 5, and 6.7 denote groups of four idler wheels installed at predetermined intervals in the direction orthogonal to the tube axis inside the movable tables 2, 2, respectively; 8, 8' denote each idler wheel 4; 5, 6. A set of underframes 9, 9 supported slidably in a direction perpendicular to the tube axis on the group 7 connects each underframe 8, 8' so that the interval between them can be adjusted. The connecting rod 10.10 is a hydraulic jack for sliding the underframe, and its base is held by a pin 12 to a fixed plate 11 fixed to the movable table 2, and the other end is connected to the cylinder rod of the hydraulic jack 10. The tip of the jack 10' is supported by a pin 14 on a fixed plate 13 fixed to the underframe 8', and the hydraulic jack 10 is expanded and contracted by remote control by the operation of a hydraulic pump (not shown), thereby forming a set of stands. Frame 8
, 8' can be slid as a unit in a direction orthogonal to the tube axis while maintaining the connected state.

Reference numeral 30 denotes a tube support device having the same structure that is movable up and down on each of the underframes 8 and 8';
'A multi-stage hydraulic jack 15.15 for vertical adjustment of the tube body 1 supported via pins 17 on fixed plates 16 fixedly installed on each side; It is pivotably mounted on the plate 20.20 via a fulcrum shaft 21.21, and the longitudinal center portion following this is equipped with a hydraulic jack 1.
The cylinder rods 15' and 15' of 5.15 are rotatably connected to the tips of the cylinder rods 15' and 15' via pins 18.18, and furthermore, the large drum-shaped rollers 2 for receiving tubes are attached to the tips of the cylinders by pins 23.23.
Push-up support stand 19.19 with 2.22 rotatably pivoted
Each set of push-up support stands 19, 19 is supported so as to be tiltable as a whole in an approach shape.

The hydraulic jacks 15 and 15 are independently and remotely operated by hydraulic pumps (not shown), so that the fulcrum shaft 21.
By tilting the push-up support base 19 around the center point 21, the four tube-receiving drum-shaped rollers 22 can be adjusted up and down and the rotation of the tube 1 can be adjusted.

In this case, the pins 17, 18 are formed into a mechanism that adapts to changes in the angle of the hydraulic jack itself that occurs as the cylinder rod 15' of the multi-stage hydraulic jack 15 expands and contracts with the fulcrum shaft 21 as the fulcrum.

Although the tip of the push-up support base 19 can directly support the tube without providing a tube-receiving roller, it is preferable to provide a rotatable roller in order to smoothly adjust the rotation in the circumferential direction of the tube. In particular, when the shape of the tube-receiving roller is made into a large drum shape, there is an advantage that the twisting load in the tube axis direction that occurs when the tube rotates can be effectively absorbed.

In the above embodiment, a track-type conveyance device has been described, but if necessary, rubber wheels or the like may be used instead of the wheels 25 to make it a trackless type.

The present invention is constructed as described above,
Next, the method of centering the pipe to be buried using the device of the present invention is as follows.

First, adjust the axial spacing between a pair of movable tables 2, 2 according to the length of the tube body 1, and adjust the lateral spacing between a pair of underframes 8, 8' according to the tube diameter. The tube body 1 is then transported to the site while being safely supported by the tube support device 30.30 on the movable table.

Next, when centering the pipe body 1, the underframe 8 is
, 8' are moved from side to side by hydraulic jacks 10 and 10 to align the tube axes in the horizontal plane, and each push-up support 19 is tilted up and down as appropriate to align the tube axes in the vertical plane. Align.

In this case, if the push-up support base 19 is operated so that one side has a slightly different inclination angle from the other, the tube body receiving roller 22 provided at the tip of the push-up support base 19
The tube body 1 can be rotated through the tube 1, thereby making it easy to adjust the rotation for attaching the backing metal.

Incidentally, each of the above adjustments can be made in exactly the same way for the reducer pipe.

Therefore, according to the present invention, the vertical, horizontal, and longitudinal directions and rotational adjustments of the pipe body to be buried can be arbitrarily and easily and reliably performed, and the centering work of the welding groove can be performed in a narrow space. It can be performed with high efficiency and precision even in difficult locations.

[Brief explanation of drawings]

Fig. 1 is a partially sectional plan view showing one embodiment of the present invention;
The figure is a partial cross-sectional view taken along line AA' in FIG. 1: Pipe body, 2: Moving table, 3: Connecting pipe, 4, 5, 6,
7: Idling wheel group, 8.8': Underframe, 9: Connecting rod, 10:
Hydraulic jack for sliding underframe, 19: Push-up support base, 30:
Tube support device.

Claims (1)

[Scope of utility model registration request] A pair of movable bases whose interval in the tube axis direction can be adjusted; and a pair of underframes connected to each other so that the lateral interval can be adjusted while being movable laterally in a direction perpendicular to the tube axis on each movable base. , a mechanism for horizontally moving each pair of underframes in a connected state, and a base end pivoted to each pair of underframes and a pipe body receiving roller at the tip, and the overall shape is in the shape of an intrusion character. A centering system that also serves to transport pipe bodies used for centering the welding groove of buried pipes, which consists of a pair of supported push-up supports and a mechanism that supports each push-up support stand in a tiltable manner. Device.