JPS6023731B2 - Excavation and pumping equipment for steel pipe mines, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pumping machine that discharges slime while excavating the bottom of a vertical hole such as the inside of a steel pipe pile.

Conventionally, to extract slime from inside a steel pipe pile, a water jet was used to remove the slime, and an air lift was used for pumping up the slime, a bucket method, a drilling drill, or a water jet and pump were used. There are some that use water jets in combination with water jets, but since the effort of jetting water into the water is extremely weakened and there is no ability to raise the bowl, the result is nothing more than a fly-worship, and it is not suitable for crushing or pumping up solid lumps with large specific gravity. In addition, the resistance to opening and closing buckets etc. underwater is high and workability is poor, and the combination of a drilling drill and a pump not only increases the size of the entire bag, but also makes it impossible to accurately The problem was that the sheath digging power was insufficient.

In view of the above-mentioned conventional problems, this invention enables stable and powerful slime excavation and pumping with a compact and easy-to-handle device. The explanation is as follows.

Fig. 1 shows the state of use of the device of this invention, in which M is a steel pipe pile, 1 is the device of this invention, 2 is a work base, 3 is its support, 4 is a crawler crane, and this device 1 is suspended within the pile M by a crawler crane 4 via a wire rope 5. This invention device 1 includes a pump P1,
Pressure water is supplied from P2, and the slime excavated within the steel pipe pile M is lifted up and discharged to the outside through the pumping pipe 6. 7 is a water tank, and 8 is a pump.

The overall structure of the apparatus 1 of the present invention is as shown in FIG. 2, and is constructed by inserting an excavation and pumping main body 11 into a cylindrical holding cylinder 10 having guide fins 9. As shown in the same figure and FIG. 3, the excavation and pumping main body 11 is constructed by branching into a plurality of pipes (two in the illustrated example) at the lower part of a single large-diameter pumping pipe 6, and fixing the branch intervals to be constant. do. This branch interval is determined by the water pressure used, the injection diameter, the pumping port, the pipe holding cylinder, etc., and the branch pumping pipes 6a, 6
a hanging parallel to each other and closing at the same height position,
At the point where the pumping pipe 6 branches, a pumping jet 12 is installed upward between the branch pipes 6a, 6a, and a pumping port 13 at the lower end thereof is installed between the branch pipes 6a, 6a.
, 13, an excavation jet 14 is mounted facing downward. Around the branch pumping pipes 6a, 6a, upper and lower tube-shaped caps 15, 16 are iron-fixed. The lower cap 16 has a filter 17 installed under the pumping port 13 in a sealed state above the pumping port 13, and can be replaced with another cap having a filter with a different mesh. be. Further, the pumping jet 12 and the excavating jet 14 can be attached to and removed from their mounting portions 18 and 19, respectively, and both can be replaced with ones having different injection apertures. These pumping and excavating jet propellants 1
2 and 14, air is introduced or supplied under pressure around the injection port, and the structure thereof is shown in FIGS. 6 to 8. The drilling jet 14 has a large number of injection holes 21 at the tip of the high-pressure water pipe 20, which spray the spray diffusely within an apex angle of about 30 degrees or less centering on the downward injection hole.
・Attach the nozzle head 22 with the protective tube 23.
A cap head 25 having a large number of injection holes 24 whose injection directions match the injection holes 21 is attached to the tip of the cap head 25 so that air can be taken in between the heads 22 and 25 from an air intake port 26. It has become. / Zurhead 22
The cap head 25 is detachable from the high-pressure water pipe 20 and the protection pipe 23, respectively, and can be replaced with one having a different spray angle. On the other hand, the pumping jet injector 12 has a single-hole nozzle head 28 attached to the tip of a high-pressure water pipe 27, and the nozzle head 28 and the protection pipe 3 are connected through an air intake port 29.
Air is inserted between it and 0. The guide pipe 31 provided on the ejection side of the excavating jet spray body 14 is detachable and can be replaced with one having a different protrusion length. 9 and 10 show the structure of the holding cylinder 10 and the guide fins 9. FIG.

This holding cylinder 1 has a cylindrical shape, receives the entire excavation and pumping main body 11 at a step 32 on the lower inner wall, is connected to this main body 11, and is suspended from a wire rope 5 through a suspension hole 33. A digging blade 34 is formed at the lower edge of the holding cylinder 10. The guide fins 9 protrude radially from the holding tube 10, and in the illustrated example, four guide fins are attached to the mounting piece 41 on the outer wall of the holding section 10.
,... is attached by. Each guide fin 9 is removable and can be replaced with another guide fin with a different protrusion width, and can also be replaced upside down.
The upper edge and lower green are provided with digging blades 35, 3 having different shapes.
6 is formed. Reference numerals 37 and 38 are mounting holes for the guide fins 9, which are bored at equal distances from each other.

In addition, when the protruding width of the guide fins 9 is wide, as shown in FIG. 2, an excavating jet ejector 39 may be attached to the surface of the guide fins 9. This jetting body 39 may be the same as that in the excavation and pumping main body 11. 0th
In Figure 2, reference numeral 40 denotes a pumping inner pipe, which can be replaced with one of a different diameter depending on the capacity of the pumping jet injector 12.
A supply pipe and an air supply pipe for supplying water to each of the pumping and excavating jet propellants 12 and 14 are drawn into the holding cylinder 10 from above and connected to each of the propellants 12 and 14. .

In the above configuration, when the entire pupil 1 is suspended within the steel pipe pile M as shown in FIGS. 1 and 2, the guide fins 9,
Since the device 1 is guided by ..., the shoe descends with almost no vibration, and the excavating and lifting main body 11 is held at the center position of the steel pipe pile M.

When the device 1 reaches the bottom of the steel pipe pile M, pressurized water is supplied only to the pumping jet projector 12 to pump up the neck slime, and if this alone is not sufficient, the excavation jet projector! Pressurized water is also supplied to 4, and the water is pumped up while being excavated, crushed, and roped. In this case, the power of high-pressure water injection is normally weakened due to the occurrence of cavitation and collision with muddy water, etc., but air is introduced due to negative pressure at the injection part, causing capitation. In addition, the effect of the air cylinder introduced by the air reduces the reduction in force and plunges into muddy water and slime, so the impact of the digging blade 34 of the holding cylinder 10 and the digging blade 36 of the guide fan 9 will cause the bottom of the pile to be crushed. The excavation is carried out by blowing away the sand, and digging up and raising the earth and sand by the water jetted from the excavation jet 14. The mixture of soil and water thus generated is sucked into the pumping port 13 by the suction force accompanying the jet jet of the pumping jet spraying body 12, and is drawn into the pumping port 13 through the branch pumping pipe 6a and the pumping pipe 6. is carried upwards through the If the diameter of the steel pipe pile M is different, replace it with one with a different protruding width of the guide fin 9,
An excessively wide gap is prevented from occurring between the inner wall of the steel pipe pile M and the guide fin 9.

In addition, the head (in the illustrated example, the nozzle head 22 and the cap head 25) of the excavating jet spray body 14 is replaced to adjust the wideness and narrowness of the broadness of the jet water. In addition, depending on the hardness and softness of the soil at the bottom of the pile, the excavation jet 12 can be replaced to change the excavation force of the jet water, and the guide fins 9 can be turned upside down or replaced with other ones to shape the excavation blade. and change the digging force using the digging blade.

As described above, this invention is constructed by inserting an excavation pumping main body consisting of a branch pumping pipe, a pumping and excavating jet injector, etc. into a holding cylinder having guide fins,
The earth and sand at the bottom of the vertical hole are excavated by the impact of the guide fins and the lower end green of the holding cylinder and the jet jet from the excavation jet injection body, and the earth and sand are sucked up from the sump opening and pumped up. Excavation, pumping up and carrying out can be carried out continuously and efficiently by extremely simple lifting and lateral movement without raising or lowering the bucket or opening and closing the bucket underwater.

The pump is equipped with separate jets for pumping and excavating, and the jets are configured to supply air that is randomly introduced into the nozzles, so the pumping jet can be adjusted depending on the softness and hardness of the slime layer. It is possible to selectively operate only the jet projector or both of the jet projectors, and ensure underwater jet power to effectively remove slime, etc. by excavating, crushing, and mowing hard slime, and increasing the specific gravity value by increasing the suction force. It is also possible to suction up even the agglomerates. Furthermore, by fixing the lower end pumping ports at a predetermined interval and providing a downward jet excavation jet jet between them, the pumping ports are connected around the jet, and the excavated or floating flies are The slime is formed into a smooth flow, and effective excavation and pumping of slime, etc. is achieved.

Furthermore, the protection tube into which the excavation pumping main body is inserted protects vulnerable parts such as pressure water and air introduction pipes, so there is no damage to the main part, and it prevents slime from spreading to other parts during excavation and preventing damage to existing walls. Prevents the imparting of disintegrating force. In addition, if the guide fins can be exchanged with ones with different protrusion widths, and the head of the excavation jet can be exchanged with ones with different injection angles, it can be used for steel pipe piles and vertical holes with different diameters. Wide range.

If digging blades are provided on the holding tube or guide fin, the impact of these cutting blades can powerfully break down the sand, making it possible to use it for excavating hard ground.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the inventive device in use, Fig. 2 is a half sectional view of the same device, Fig. 3 is a sectional view of the main part of the excavation pumping main body,
Figure 4 is a sectional view taken along the line A-A in Figure 3, Figure 5 is a bottom view of the excavation and pumping main body, Figure 6 is a half sectional view of the excavation jet propeller, Figure 7 is its front view, and Figure 8 The figure is a half-sectional view of the jet ejector for pumping up, FIG. 9 is a plan view of the holding cylinder, and FIG. 10 is a cross-sectional view of the holding cylinder. 6... Pumping pipe, 9... Guide fin, 10... Holding tube, 11... Excavation and pumping main body, 12...・Jet propeller for pumping,
13... pumping port, 14. ．． ...Jet propellant for drilling, 17...Filter, 22...Nozzle head, 25...Cap head, 26...
Air intake port, 28...Nozzle head, 29...
...Air intake, 34, 35, 36...Drilling blade. Figure 1 Figure 7 Figure 9 Figure 10 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 8

Claims (1)

[Scope of Claims] 1. In a device in which the lower part of the pumping pipe is branched into a plurality of pipes to form a branch pumping pipe, a pumping jet injection body for upward injection is provided at the branch position of the pumping pipe. In addition, the lower end pumping ports of a plurality of branch pumping pipes are fixed at a predetermined interval, and a drilling jet spraying body for downward jetting is installed between them, and air is introduced by negative pressure around the respective jets. The excavation pumping body, which has a pumping port opened around the excavation jet injection body, is charged and locked into a protective cylinder suspended by a crane, etc., leaving air at the lower end, and the protective cylinder is suspended. A device for excavating and pumping up inside a steel pipe pile, characterized in that a plurality of guide fins for sliding contact with an existing hanging wall, such as an inner wall surface of a steel pipe pile, protrude radially from an outer peripheral wall. 2. The device for excavating and pumping up steel pipe piles, etc., according to claim 1, wherein the head of the jet injection for excavation performs a diffuse injection in a range of an apex angle of 30 degrees or less with a downward injection as the center. 3. The device for pumping up steel pipe piles, etc., according to claim 1, wherein the guide fins are replaceable with ones having different protrusion widths. 4. The device for excavating and pumping up steel pipe piles, etc., according to claim 1, wherein the lower ends of the guide fin and the holding cylinder are equipped with an excavator blade. 5. The device for excavating and pumping up steel pipe piles, etc., according to claim 1, wherein the guide fin has excavation blades of different shapes on the upper and lower sides and can be attached to the holding tube upside down. 6. The device for excavating and pumping up steel pipe piles, etc., according to claim 1, wherein the guide fin is equipped with an excavating jet propellant.