JPS5931824Y2 - Propulsion tube pushing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a propulsion tube pushing device used for pushing a propulsion tube almost horizontally into the ground.

Recently, as a method for laying propulsion pipes underground, a method has been adopted in which support piles are dug in the ground and the Huyum pipe is pushed horizontally into the ground from the side walls of the support piles.

In this case, the pushing device used to push the hume pipe is a rigid frame with a number of hydraulic cylinders fixed in the same direction, and the frame is attached to the side wall of the supporting pile facing the hume pipe. The hydraulic cylinder was operated while the piston rod was pressed against the end of the hume pipe.

In such conventional pushing devices, the effective pushing stroke is equal to the piston rod pushing stroke of the hydraulic cylinder, and cannot be made sufficiently long.

That is, in order to lengthen the effective pushing stroke of the pushing device,
If the hydraulic cylinder is made longer, the initial length of the entire pushing device becomes longer, and the cross-sectional dimension of the support pile on which the pushing device is placed must be increased, which makes it impossible to increase the effective pushing stroke of the pushing device. Ta.

To push in a hume tube using such a pushing device, actuate the hydraulic cylinder to push in the hume tube, and then pull in the piston rod to create an appropriate length between the end of the hume tube and the piston rod. Interpose a block,
It was necessary to operate the hydraulic cylinder again to push the hume pipe through the block.

Such operations are troublesome and dangerous since they involve handling heavy blocks, and are undesirable in terms of the possibility of work failure.

Therefore, it is possible to install a two-stage hydraulic cylinder.

However, since the penetration direction is horizontal, even with a two-stage hydraulic cylinder, the rod must be deflected due to the long slide, which requires some kind of reinforcement and significantly increases the cost of the device. There were some points that I didn't like.

The present invention aims to rectify such drawbacks and provides a pushing device that has a large effective pushing stroke without increasing the initial length of the entire device.

The pushing device of the present invention has a plurality of hydraulic cylinders fixed to a rigid frame that is movable back and forth in parallel to the moving direction of the frame, and the pistons of the hydraulic cylinders are made up of a set of some of the cylinders. The piston rod is characterized in that the extending direction of the rod is opposite to the extending direction of the piston rods of the remaining hydraulic cylinders, which are made up of a plurality of piston rods.

Embodiments of the present invention shown in the drawings will be described below.

The pushing device, designated as a whole by the number 1, has a rigid frame 2, at the bottom of which wheels 3 are provided so that the frame can move freely horizontally.

A large number of hydraulic cylinders 4 and 5 are fixed to the frame 2 horizontally and in parallel to each other.

One set of hydraulic cylinders 4 is arranged so that its piston rod 6 extends to the left in FIG. 1, and the other set of hydraulic cylinders 5 is arranged so that its piston rod 7 extends to the right. There is.

The tip of the piston rod 6 is connected to a tube pushing plate 9 via a spherical joint 8.

Wheels 10 are attached to the tube pushing plate 9 to enable free movement.

On the other hand, a flange 11 is provided at the end of the other piston rod 7.
are connected to a support plate 14 pressed against a side wall 13 of the stand 12.

On the other side wall 15 of the stand 12, there is already a hume pipe 16.
has been pushed in, and a hume tube 17 to be newly pushed in is connected to the hume tube 16.

Hume pipe 17 is supported by a truck 18.

A rail 19 is provided on the bottom of the stand.

Next, the operation of laying a humid pipe using the pushing device according to the present invention will be explained.

First, one set of hydraulic cylinders 5 is operated, and the piston rod 7 is extended from the hydraulic cylinders 5.

Since the tip of the piston rod is restrained by the support plate 14, the frame 2 moves to the left in FIG. 1, pushing the hume tube 17 leftward via the tube pushing plate 9, and inserting it into the ground.

When the insertion operation by the hydraulic cylinder 5 is completed, the hydraulic cylinder 5 operates the other set of hydraulic cylinders 4 in a pressurized state, and the piston rod 6 is extended.

This time, the frame 2 does not move, and only the piston rod 6 moves to the left to push the tube pushing plate 9 and push the hume tube 17 into the ground to a desired position.

When the above operations are completed, both hydraulic cylinders 4 and 5 are operated to retract the piston rods 5 and 6.

This operation returns the pushing device to its original state shown in FIG.

Therefore, a new hume tube is inserted between the end of the hume tube 17 pushed into the ground and the tube pushing plate 9, and connected to the hume tube 17.

The same operation is then repeated to lay the hump pipe underground.

As described above, according to the present invention, by attaching the hydraulic cylinders in opposite directions, the effective stroke length for pushing the tube can be made twice the stroke of the hydraulic cylinder.

As a result, there is an excellent effect in that a long hume pipe can be pushed into the ground without the troublesome operation of interposing a block between the hume pipe and the hume pipe as in the conventional method.

Moreover, since the initial length of the entire pushing device (the length when the piston rod is retracted) is not much larger than that of the conventional device, there is no restriction on the standing position in which the pushing device of the present invention can be used.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the operating state of the pushing device of the present invention, Fig. 2 is a sectional view taken along line II-II in Fig. 1, and Fig. 3 is a sectional view taken along line II-II in Fig. 1. It is. 1...Pushing device, 2...Frame, 4
, 5... Hydraulic cylinder, 6, 7... Piston rod, 9... Tube pusher plate, 16.17.
... Huyum tube.

Claims (1)

[Scope of utility model registration request] A plurality of hydraulic cylinders are fixed to a rigid frame that is movable back and forth in parallel to the moving direction of the frame, and the direction in which the piston rods of the hydraulic cylinders of which some of the plurality of cylinders are set as one set is A propulsion tube pushing device characterized in that the remaining plurality of piston rods are arranged in a direction opposite to the extending direction of the piston rods of the hydraulic cylinders.