JPH069059Y2 - Injection port position switching device for injection pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a device for switching the position of an injection port by inserting a ball in a grout injection pipe.

[Conventional technology]

Generally, the grout injection is carried out by using the injection installation shown in FIG. 7, and the injection tube 1 is chucked up and down and rotated by the installation machine 2, and the injection tube 1 is drilled and drilled during the grout injection. Water and grout are introduced from the injection pump 3 via the rubber hose 4 and the swivel 5, respectively.

A tip device 6 as shown in FIG. 8, for example, is connected to the tip of the injection tube 1. A tip injection port 6a is formed at the tip of the tip device 6, and a valve seat 6b of the ball 7 is provided midway.
Are formed. On the other hand, a peripheral wall injection port 6c is formed on the peripheral wall whose base end is closer than the valve seat 6b.

In such a device, as shown in FIG.
In order to discharge the water from the tip inlet 6a, the drilling water W is guided to the tip inlet 6a and discharged as it is in a state where the ball 7 has not been charged yet. When the boring is completed and the grout G is injected, the pump 3 shown in FIG. 7 is stopped and the joint 4a between the hoses 4 and 4, the joint 4b between the hose 4 and the swivel 5, or the swivel 5 is inserted. And the joint portion 5a of the injection pipe 1 are separated from each other, the ball 7 is thrown into the injection passage, and the ball is put on the flow of the liquid by restarting the pump 3, or when the joint portion 5a is thrown. As shown in FIG. 8 (B), the ball 7 is dropped to the valve 6b by its own weight, and the flow path to the tip injection port 6a is blocked, so that the grout G to be subsequently fed from the peripheral wall injection port 6c. I was pouring out.

[Problems to be solved by the device]

However, in the conventional example, to switch the position of the inlet,
The liquid transfer must be interrupted, usually for 5 to 10 minutes, during which the balance between the injection pressure and the ground is disrupted, the ground around the rod collapses, and the so-called germing phenomenon occurs in which the rod cannot rotate, It was a construction bottleneck.

In addition, when the construction is completed at one location and the construction is performed at the next location, it is necessary to perform the ball throwing work as described above again.
It takes a lot of work.

Therefore, the main purpose of the present invention is to make it possible to turn on the ball valve during liquid transfer, thereby reliably preventing germing, and additionally holding a plurality of balls in advance and changing the construction location. Sometimes it is to provide a device that can throw the next ball.

[Means for Solving the Problems]

The above-mentioned problem is to form a peripheral wall injection port on the peripheral wall of the injection pipe, form a valve seat on the tip side from this injection port, and form the injection path from the base of the injection pipe with the tip from the peripheral wall injection port and the valve seat. In a switching device that communicates with the tip injection port and switches the injection port position from the tip injection port to the peripheral wall injection port by inserting the ball into the ball valve seat in the injection channel; facing the injection channel near the base of the injection pipe The problem can be solved by providing the holding means that is built in and holding and the holding releasing means.

[Action]

According to the present invention, when the holding releasing means is operated, the ball falls by its own weight. Further, since the ball is held in advance by facing the pouring path with the holding release means as a boundary, the ball can be thrown in during the liquid transfer and the jamming can be prevented.

Further, if a plurality of balls are built in advance, it is not necessary to replenish the new balls at the next construction position, and the construction at the next construction position can be started immediately.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to various embodiments.

The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 shows an embodiment of the present invention. I.e. ball 4
An expanded diameter portion 10c is formed in the hollow portion of the tubular member 10 having a liquid inlet 10a and a liquid outlet 10b that are connected to the tip of the. In the expanded diameter portion 10c, a substantially spherical closing member 13 connected to a handle 11 provided outside the tubular member 10 by a shaft 12 is attached via an annular seal member 14a. The closing member 13 is formed with a groove 13a having a circular cross section that reaches the center of the closing member 13, and the ball 7 is held therein. The closing member 13 is pressed by a cylindrical pressing member 15 screwed to the end of the cylindrical member 10 via an annular seal member 14b. Then, the tubular member 10 is attached to the swivel portion at the base end of the injection tube 1.

In this embodiment, the closing member 13 and its groove 13a constitute a holding means for the ball 7 of the present invention, and the handle 11, the shaft 12 and the closing member 13 constitute a releasing means for releasing the holding of the spherical body of the present invention.

The operation of this embodiment will be described. First, the ball 7 that is seated on the conical taper surface 6b of the tip device 6 as a valve body from the hollow portion of the pressing member 15 is put into the groove 13a of the closing member 13 in advance.

Then, in order to switch the liquid injection direction, when throwing the ball 7 into the liquid injection pipe 1, the handle 11 is rotated so that the groove 13a is directed downward as shown in FIG. It communicates with the liquid passage of the liquid pipe 1. As a result, the ball 7 in the groove 13a is thrown into the liquid passage due to its own weight or a negative pressure generated near the liquid outlet 10b by the liquid flowing from the liquid inlet 10a to the liquid outlet 10b. Then, as described in the conventional example, the liquid is transferred to the tip device 6 and the liquid injection direction is switched.

FIG. 2 shows another embodiment of the present invention. The hollow portion 20c of the tubular member 20 having a bottom and having a liquid inlet 20a and a liquid outlet 20b near its bottom is closed in the shape of a round bar connected to a handle 21 outside the tubular member 20. Member 22
Is rotatably attached through the O-ring 23 through the hollow portion 20c. The closing member 22 is formed with a through hole 22a penetrating from one side of the outer peripheral surface to the other side. The ball 7 is inserted into the hollow portion 20c of the tubular member 20, and the sealing member 24 is screwed into the open end of the tubular member 20. Similar to the above-described embodiment, the tubular member 20 is provided in the middle of the hose 4, and the liquid inlet 20a and the liquid outlet 2 are provided.
It is provided in the injection passage to the injection pipe 1 via 0b.

In this embodiment, the closing member 22 constitutes a holding means for the spherical body of the present invention, and the handle 21, the closing member 22 and the through hole 22a thereof constitute a releasing means for releasing the holding of the spherical body of the present invention.

The operation of this embodiment will be described. That is, when switching the liquid injection direction, the handle 21 is rotated, the closing member 22 is rotated, and the through hole 22a of the closing member 22 is rotated.
Through the liquid inlet 20a and the liquid outlet 20b.
As a result, the ball 7 held on the outer peripheral surface of the closing member 22 falls by its own weight, is flowed by the dynamic pressure of the liquid flowing in the liquid passage, reaches the tip device 6, and the liquid injection direction is switched. .

FIG. 3 shows still another embodiment of the present invention. The structure of this embodiment relates to an improvement of the embodiment shown in FIG.
The same elements will be denoted by the same reference symbols and description thereof will be omitted. The closing member 22 has a groove 22b having a circular cross section from the outer peripheral surface to the central portion.
Is formed, and the ball 7 is housed in the groove 22b.

In this embodiment, the closing member 22 and the groove 22b thereof form a holding means for the spherical body of the present invention, and the handle 21 and the closing member 22 form a releasing means for releasing the holding of the spherical body of the present invention.

In this embodiment, the handle 2 is used when switching the liquid injection direction.
1 is rotated so that the groove 22b of the closing member 22 is communicated with the liquid inflow port 20a and the liquid outflow port 20b side, and the ball 7 is thrown into the liquid passage of the liquid injection pipe 1 (see FIG. 3 ( B)
And (C)).

FIG. 4 shows still another embodiment of the present invention. That is, the tubular member 30 including the liquid inlet 30a and the liquid outlet 30b.
A cylindrical protrusion 30c is formed on the. An annular stopper member 31 made of an elastic material such as rubber is fitted into the wall of the tubular member 30 at the protruding portion 30c. The stopper member 31 has a shape and elasticity capable of holding the ball 7. A pusher member 34, which is connected to a knob 32 provided outside the tubular member 30 via a shaft 33, is provided inside the inner peripheral surface 30d of the protrusion 30c. And the protrusion 30c
A cap member 36 is screwed onto the open end of the with a liquid tightness with the shaft 33 by an O-ring 35.

In this embodiment, the stopper member 31 constitutes a holding means for the spherical body of the present invention, and the knob 32, the shaft 33 and the pusher member 34 constitute a releasing means for releasing the holding of the spherical body of the present invention.

In the present embodiment, when the direction of liquid injection is changed, the pusher member 34 pushes the knob 32 downward in the drawing to make the ball 7 move.
To push the ball 7 into the liquid passage against the elastic force of the stopper member 31 (see FIG. 4 (B)).

FIG. 5 shows still another embodiment of the present invention. That is,
Cylindrical member 4 having liquid inlet 40a and liquid outlet 40b
At 0, a bulge portion 40c that expands outward is formed.
On the other hand, a conical recess 40d on which the ball 7 is seated is formed below the bulging portion 40c in the figure. A screw rod 42 fixed to a handle 41 outside the tubular member 40 is screwed into the bulging portion 40c while being held in a liquid-tight state by an O-ring 44. , Conical groove 43
The ball pressing member 43 formed with a is fixed.

In this embodiment, the concave portion 40d of the tubular member 40, the handle 41, the screw rod 42, and the ball pressing member 43 constitute the spherical holding member of the present invention, and the handle 41, the screw rod 42,
The releasing means for releasing the holding of the spherical body of the present invention is constituted.

In the present embodiment, when changing the liquid pouring direction, the handle 41 is rotated to raise the ball pressing member 43 upward in the figure, the ball 7 is unconstrained, and the liquid is injected from the liquid outlet 40b by the dynamic pressure of the liquid. The liquid is introduced into the liquid passage of the liquid pipe 1 (see FIG. 5 (B)).

FIG. 6 shows still another embodiment of the present invention. That is, a ball throwing portion 50c for throwing the ball 7 into the tubular member 50 having the liquid inlet 50a and the liquid outlet 50b formed therein.
Are integrally formed. A first groove 50d having a circular cross section whose one end communicates with the liquid inflow port 50a and the liquid outflow port 50b, and a second groove 50e intersecting at the intermediate portion are formed in the ball throwing portion 50c. . A piston member 52, which is kept in a liquid-tight state by an O-ring 51, is slidably fitted and inserted into the inner peripheral surface of the first groove 50d, and the piston member 52 is provided with a knob 53 provided on the outside and a shaft 54. Are connected via. A cap member 55 is screwed into the opening of the first groove 50d, and a part of the shaft 54 is screwed into the cap member 55. Second groove 50e
A plurality of balls 7 (four in the figure) are inserted in series therein, and the cap member 5 is inserted into the opening of the second groove 50e.
6 is screwed together.

In this embodiment, the second groove 50e and the outer peripheral surface of the piston member 52 constitute the spherical body holding means of the present invention,
The knob 53, the shaft 54, and the piston member 52 constitute a releasing means for releasing the holding of the spherical body of the present invention.

The operation of this embodiment will be described.

That is, when switching the liquid injection direction, first, the knob 53
Is rotated, the shaft 54 and the cap member 55 are unscrewed, and the piston member 52 is pulled to the right side in the drawing (see FIG. 6 (B)). As a result, the second groove 50e and the second groove 5
0d communicates with each other, and the plurality of balls 7 in the second groove 50e fall downward in the figure due to their own weight. Since the diameter of the end surface of the piston member 52 is slightly larger than the diameter of the ball 7, the number of balls coming in front of the piston member 52 is limited to one.

Then, the reverse operation is performed. That is, the knob 53 is pushed to the left side in the drawing, and the shaft 54 is screwed into the cap member 55 (see FIG. 6 (C)). As a result, the piston 52
Only the ball 7 located in front of the ball is thrown into the liquid outlet 50b. Then, the liquid is transferred to the tip device 6 provided at the tip of the liquid injection pipe 1.

As shown in the above embodiments, the balls 7 can be introduced into the liquid passage of the liquid injection pipe 5 without stopping the pump, so that the jamming phenomenon due to the stop of the pump can be suppressed.

Further, the ball 7 can be thrown into the liquid passage with one touch by operating the handles 11, 21, 41 or the knobs 32, 53. Therefore, the hose and the liquid injection pipe can be charged without disconnecting the hose and the liquid injection pipe as in the conventional case, so that the man-hour for charging the ball 7 can be greatly reduced.

[Effect of device]

As described above, according to the present invention, the ball holding means is provided so as to face the liquid passage in the liquid filling pipe, and when the liquid filling direction is changed, the holding of the ball by the holding means is released to place the ball in the liquid passage. Since the releasing means for charging the ball is provided, the ball can be charged into the liquid injection tube by a very simple method without stopping the pump, and the jamming phenomenon can be suppressed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing another embodiment of the above, FIG. 3 is a sectional view showing yet another embodiment of the same, and FIG. FIG. 5 is a sectional view showing still another embodiment of the above, FIG. 5 is a sectional view showing yet another embodiment of the same, and FIG. 6 is a sectional view showing still another embodiment of the same.
The figure shows the overall outline of the conventional grout construction method, No. 8
The figure is a sectional view of the tip device of the above. 7 ... Ball, 11 ... Handle, 12 ... Shaft,
13 ... Blocking member, 13a ... Groove, 21 ... Handle,
22 ... Blocking member, 22a ... Through hole, 22b ... Groove,
31 ... Stopper member, 32 ... Knob, 33 ... Shaft, 34 ... Pusher member, 40 ... Cylindrical member, 40d
...... Concave, 41 ...... Handle, 42 ...... Spiral, 43 ......
Ball pressing member, 50 ... Cylindrical member, 50e ... Groove, 5
2 ... Piston member, 53 ... Knob, 54 ... Shaft

Claims (1)

[Scope of utility model registration request] 1. A peripheral wall injection port is formed on the peripheral wall of the injection pipe, a valve seat is formed on the tip side of this injection port, and an injection path from the base of the injection pipe is formed from the peripheral wall injection port and the valve seat. In a switching device that communicates with the tip injection port of the nozzle and switches the injection port position from the tip injection port to the peripheral wall injection port by inserting the ball into the ball valve seat in the injection channel; the ball facing the injection channel near the base of the injection pipe. An injection port position switching device for an injection pipe, characterized in that it is provided with a holding means for internally holding and holding the holding means.