JPS5931990Y2 - Stone removal equipment in pipelines - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a stone removal device that is attached to the suction pipe of an excavator, such as a reverse circulation drill, that sucks up excavated materials such as rocks together with muddy water.

Next, an outline of the construction mode using a reverse circulation drill will be explained with reference to FIG.

A rotary table 3 that rotates the bit 2 is supported on the work platform 1.

The bit 2 is connected to a suction hose 7 via a drill pipe 4, a kely bar 5, and a swivel joint 6.

The suction hose 7 is connected to the suction port of the suction pump 8 of the suction pump device P, and the water tank 1 is connected to the discharge port of the suction pump 8.
0 is connected to a discharge hose 9 for discharging muddy water.

Inside the water tank 10 is a submersible pump 1 that supplies supernatant water to the excavation hole.
1 is installed.

The earth and sand excavated by the bit 2 is sucked up together with muddy water, passed through the bit 2, drill pipe 4, kelly bar 5, swivel joint 6, and suction hose 7, and is sucked into a suction pump 8, and then discharged into a water tank 10 through a discharge hose 9. It will be done.

If the rocks sucked up with the excavated earth and sand are large, the suction pump 8 and its suction and discharge side equipment may be damaged or clogged.

Therefore, as shown in FIG. 2, a box body 1 with an outlet 12b smaller than an inlet 12a has been conventionally installed in the middle of the suction pipe, for example, between the suction port of the suction pump 8 and the suction hose 7.
2 is installed so that a large rock S passing through the inlet 12a is caught at the outlet 12b, and by opening the lid 13 fixed to the box body 12, the caught rock S can be taken out.

However, with this structure, the portion of the outlet 12b where rocks are caught is subject to significant wear and damage, and in some cases, the box 12 may have to be replaced to repair it.

In some cases, the caught rock may be deeply inserted into the suction pump 8 as shown in FIG. 2, and in this case, it becomes difficult to remove the rock.

In view of the above-mentioned problems, the purpose of this invention is to provide a stone removal device that can minimize the repair and cost of damage to the part where rocks are caught, and can easily remove the caught rocks. There is something to do.

An embodiment of this invention will be described below with reference to FIGS. 3 to 5.

One end of the box body 14 is removably connected to the suction side of the suction pump 8 and the other end to the suction hose 7 by bolts 15, respectively.

The inner wall of the box body 14 is provided with a pair of guiding and holding protrusions (hereinafter referred to as protrusions) 14a.

14b is formed, and the stone outlet 1 is formed on the top surface of the box.
4C is wide open.

A catch ring 16 is inserted between the protrusions 14a and 14b. The catch ring 16 is tapered in diameter toward the suction pump 8 and has a hole 16a.

The hole 16a of this hook has a center that is approximately the same as the center of the conduit, and its size is slightly smaller than the inner diameter of the conduit.

What is the catch ring 16 and the protrusions 14a and 14b?
When inserting the catch ring 16, the hole 16a is configured to always be oriented in a fixed direction.

That is, in this embodiment, the protrusion amount of the protrusion 14b is larger than that of the protrusion 14a, and the catch ring 1
6 has a portion 1 inserted between the protrusions 14a and 14b.
6b and a portion 16C corresponding to the inner peripheral surface of the protrusion 14a.

Therefore, the protrusions 14a and 14b guide the insertion of the catch ring 16, and also hold the catch ring 16 so that it does not move due to the impact of rocks hitting the catch ring 16 when muddy water flows. At the same time, the hook can keep the direction of the hole 16a constant.

The catch ring 16 is hooked into the hole 16a.The reason why the hole 16a is tapered is to reduce the resistance of the pipe when muddy water or relatively small rocks pass through it.Therefore, this hole is chamfered in an R shape on the upstream side. But that's fine.

The insertion position of the catch ring 16 is set at the center of the box body 14 or slightly closer to the suction pump 8, considering the ease of taking out the rock.

Brackets 17 having rectangular holes 17a are fixed to both sides of the upper part of the box body 14, and a lid 18 is attached above the outlet 14C.

This lid 18 consists of a beam 19 inserted into the hole 17a of the bracket 17 and a boss 19 formed in the middle of the beam 19.
It is fixed to the box body 14 by the hole (20) fitted into the slotted hole in a.

If a large rock sent along with earth and sand through the suction hose 7 gets caught in the hole 16a of the catch ring 16, loosen the bolt 20 and remove the lid 18, and the box body 1 will be removed.
4. Rocks and earth can be taken out.

If the rock is deeply stuck in the catch ring 16a and cannot be easily removed, place the rock together with the catch ring 16 in the box 1.
4, and the hook can be easily removed by striking a rock from the small diameter side of the hole 16a.

In this case, in the present invention, the guide and holding protrusion for the catch ring is provided in the center of the box body or closer to the suction side, so that the rock can be easily taken out together with the catch ring.

In addition, in the present invention, the catch ring 16 is attached to the box body 1.
4, and its catch ring 16 is detachably held in the box body 14, so the catch ring is the only part that is subject to wear and damage when rocks are caught, and therefore, it is not susceptible to wear or damage from rocks. In the event of damage, if it is minor, all you need to do is build up the repair, and if it is serious, just replace the catch ring.The replacement work is easy, and the cost is only the cost of repairing or replacing the catch ring. Therefore, it is placed extremely low.

As explained above, according to this invention, even if a rock is deeply caught, the rock can be easily removed, and the wear and damage caused by the rock can be localized to the catch ring for repair. This has the effect of reducing replacement costs.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the construction mode of a reverse circulation drill, Fig. 2 is a sectional side view showing an example of a conventional stone removal device in a suction pipe, and Fig. 3 is an embodiment of this invention. FIG. 4 is a plan view, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is an enlarged perspective view showing the box in FIGS. 3 and 4 and a catch ring extracted from the box. 7...Suction hose, 8...Suction pump, 14...Box, 14a, 14b...
Catch ring guide and holding protrusion, 14 C...
...Ejection port, 16...Catch ring, 16
a...Hook is hole, 17...Bracket, 18...Lid, 19...Beam, 1
9a...Boss, 20...Bolt.

Claims (1)

[Scope of utility model registration request] The box body consists of a box body whose front and rear ends can be detachably connected in the middle of the suction pipe, a stone catch ring that is separate from the box body, and a lid of the box body. A stone removal port is made large on the top surface, and a guiding and holding protrusion for the catch ring is formed at the center or nearer to the suction side of the inner wall of the box body, and the catch ring is provided with a guide and holding protrusion on its periphery. A portion of the box body that engages with the guide/holding protrusion is formed, and a hole is provided approximately in the center for a stone catch smaller than the inner diameter of the conduit, and the catch ring is attached to the guide/holding protrusion. A device for removing stones from a conduit such as a reverse circulation drill, characterized in that a stone removal device is inserted into and held in a conduit, such as a reverse circulation drill, and further comprises a removably attached lid for sealing a stone removal port on the box body.