JPH0728233Y2 - Submarine rock crushing device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a crushing device used for rock crushing work on the seabed or lake bottom, in particular, a rock breaking tool is suspended from a hoist on the hull to the seabed. The present invention relates to a seabed rock crushing device for crushing work.

(Prior Art) Conventionally, as a seabed rock crushing device of this type, a heavy rock crushing rod suspended from a ship by a wire is repeatedly dropped, and the rock mass is crushed by the impact at that time or crushed by air pressure. The chisel is driven to perform crushing work. Further, as shown in Japanese Utility Model Publication No. 56-154490, a hammer is allowed to freely fall into a steel pipe suspended at the tip of a boom, and the drop force exerts an impact force on the chisel to crush the bedrock at the bottom of the water. Undersea rock drilling rigs are known. Fifth
FIGS. 6A and 6B are schematic views of a weight-type crusher utilizing this drop impact by gravity. In the case of FIG. 5, a crane 21 on the hull 1
A wire rod 25 that suspends a crushed rock rod 24 from a hoisting machine 22 via a boom 23
Suspended at the appropriate height above the surface of the water, free the hoisting machine 22 and let the crushing rod 24 fall by its own weight.
Crush. In the conventional example shown in FIG. 6, the hull 1 is directly provided with the guide posts 28 and the hoisting machine 22, and the hoisting machine 22 suspends the wire.
The crushed rock rod 24 suspended by 25 is guided by the guide post 28 and dropped by its own weight. In the device shown in Japanese Utility Model Laid-Open No. 56-154490, the lower end of a steel pipe having an open upper end that is suspended from the top of a crane is equipped with a chisel through a steel chisel fitting, and the steel pipe The lower end has a waterproof structure so that the hammer that falls inside the steel pipe is not affected by underwater resistance or tidal current.

(Problems to be solved by the invention) In the above-mentioned conventional weight crusher, the rock mass is crushed only by the drop impact force due to the own weight of the crushing rock rod, so the crushing force is weak, especially when the depth of the seabed becomes deeper. The resistance of water reduces the crushing energy. Also, if it is dropped from a high position in the air, noise will occur when the rock breaking bar hits the surface of the water, and especially in the case of Fig. 5, since there is no guide for the rock breaking bar 24, strong wind or The falling position is not fixed due to the influence of the tidal current. In the case of FIG. 6, it is necessary to move the entire ship when changing the crushing position, which is inefficient. It takes a lot of time to repeat falling and pulling up of a crushed rock rod, and as the depth increases, the time required for one hit increases, which is inefficient. In addition, there were many problems such as the crushing progress during operation was not known, and the crushing direction was only the vertical direction, and the crushing angle could not be freely selected. In addition, in the above-mentioned underwater rock excavation equipment, the hammer is not affected by the water flow because it falls in the steel pipe, but since the steel pipe is just hung by the hanging rope, when the tidal flow is fast, the steel pipe It was difficult to position the chisel at the desired location because it was washed away. Therefore, it is conceivable to hold the steel pipe with a support material from above the berth, but in this case it is necessary to move the pier to align the chisel with the excavation point while keeping the steel pipe in the vertical state. The workability is poor and it takes a lot of time to prepare for the actual excavation. Moreover, since the suspension angle of the steel pipe cannot be changed, the crushing direction must be limited to the vertical direction. Further, since the upper end of the steel pipe is open, there is a problem that a large noise is generated from the upper end of the steel pipe when the hammer hits the metal fitting.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide a seabed rock crushing device capable of accurately determining the position of the crushing site and setting the depth, improving work efficiency and preventing noise.

(Means for Solving the Problems) An undersea bedrock crushing device according to the present invention comprises a swing type crane mounted on a hull, an undulating boom provided on the swing type crane so as to be capable of undulating, and a pivotal connection to the undulating boom. Telescopic mast mechanism including an outer cylinder and an inner cylinder that can be inserted and removed from the lower end of the outer cylinder, a telescopic boom provided in the swingable crane so as to be capable of hoisting and pivotally attached to a lower portion of the outer cylinder, A holding cylinder fixed to the lower end of the cylinder, and an underwater crushed rock portion that is slidably held on the side of the holding cylinder and is suspended from a hoisting machine on the swing crane via the upper end of the outer cylinder. An operating drive unit, an underwater crushed rock unit mounted on the drive unit, a drive source provided on the hull side and supplying power to the drive unit, and provided between the outer cylinder and the inner cylinder. And a guide for preventing the inner cylinder from rotating and guiding its vertical movement. And a section.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall side view of a bedrock crushing device according to an embodiment of the present invention. In this example, the bedrock 30 on the seabed is vertically crushed by a crushing chisel. A swinging crane 2 is installed on the hull 1, and the swinging part of the crane swings a hoisting boom 5, a catch hawk (telescopic boom) 6 that expands and contracts in the lateral direction, a hoisting machine 3 for the hoisting boom 5, and A hoisting machine 4 for a rock breaking part is provided which suspends a submersible hammer 12 by a suspension wire 9 along a telescopic mast mechanism.

The telescopic mast mechanism has a long outer cylinder portion 7 whose outer portion is pivotally attached to each tip of the hoisting boom 5 and the catch hawk 6,
An inner tubular portion 10 that is inserted into and out of the outer tubular portion 7 and partially projects downward from the lower end of the outer tubular portion 7, and a hanging wire 11 that is mounted on the upper end of the outer tubular portion 7 and passes through the outer tubular portion. Through the inner cylinder 10
And a hoisting machine 8 for a telescopic mast for suspending. The hoisting boom is pivotally attached near the upper portion of the outer tubular portion 7, and the catch hawk 6 is pivotally attached to the lower portion of the outer tubular portion 7. Second
As shown in the figure, a plurality of guide rails 16 extending in the longitudinal direction are formed on the outer side of the inner cylindrical portion 10.
Corresponding to 16, a concave guide 15 is formed on the inner side surface of the outer tubular portion 7 for guiding the guide rail in the vertical direction. Reference numeral 14 is a guide plate for the outer cylinder portion 7. Figure 1 and its III-III
Referring to FIG. 3 showing a line cross-section, a slightly large diameter crushed rock holding cylinder 10a is attached to the lower part of the inner cylinder 10, and the holding cylinder 10a has a guide plate 19 formed on the outer side thereof. An annular underwater hammer holder 18 is slidably mounted along the holding tube 10a via. 17 is an underwater hammer holder 18
It is a U-shaped guide fixed to the
The guide plate 19 of the rock-crushing part holding cylinder 10a is held by the rock 17, and thereby the underwater hammer holder 18 is slidably attached to the holding cylinder 10a. The underwater hammer 12 is inserted and held in the underwater hammer holder 18. As the underwater hammer, for example, a type in which a ram (piston) and a piston rod are incorporated in a sealed casing and the piston rod slides in the casing via a seal bush is used. The pile head cap and the chisel are connected to the lower end of the piston rod, and the ram hits the pile head cap by the hydraulic oil introduced into the casing through the hose.

The upper end of the underwater hammer 12 is connected to the hammer suspension wire 9 that hangs along the mast mechanism from the hoisting machine 4 for rock breaking part on the crane 2 through the sheave 27 at the upper end of the outer cylinder part 7 of the telescopic mast mechanism. . The vertical position of the underwater hammer 12 is changed by driving the hoisting machine 4. Underwater hammer 12
A chisel 13 is attached to the lower part of the to vibrate in the axial direction. Reference numeral 20 is a hydraulic hose that strikes and vibrates the ram of the underwater hammer 12. The hydraulic hose 20 is connected to a power supply source installed on the hull side, that is, on the hull 1 or the main body of the crane 2, in this case, a compressed air supply device (not shown).

The slewing mechanism of the slewing crane 2, the undulating boom 5, the catch hawk 6, etc. are operated to bring the telescopic mast mechanism above the crushing position of the seabed rock, and the inner cylinder telescopic mast hoist 8 is driven to drive the inner cylinder. While lowering the portion 10 to guide the underwater hammer 12, the underwater hammer 12 is simultaneously driven by the rock breaking portion hoist 4.
Are lowered until the chisel 13 at the lower end thereof comes into contact with the crushed portion. In this state, the underwater hammer 12 hits the head of the chisel and fractures the rock underwater at the tip of the chisel. As the crushing work progresses, the suspension wire 9 is wound down, the hammer 12 and the chisel 13 are lowered, and the inner cylinder portion 10 of the mast mechanism is also extended in accordance with the underwater hammer 12. As mentioned above, the inner cylinder part 10 is a guide rail.
The outer cylindrical portion 7 is guided by the 16 and the concave guide 15.
With respect to the inner cylinder part 10 does not rotate around the axis,
Its position and chisel angle can be maintained. Chisel
When changing the angle of 13 with respect to the vertical direction, the catch hawk 6 is expanded and contracted to incline the entire telescopic mast mechanism about the pivot point between the hoisting boom 5 and the outer cylinder part 7.

The depth at which the bedrock is crushed by the underwater hammer 12 can be detected from the amount of unwinding of the suspension wire 9 that suspends the underwater hammer 12 immediately after the crushing is started. Can be set more accurately than

FIG. 4 is a partial side view showing another embodiment of the present invention. This embodiment is an example in the case of carrying out plane crushing of a seabed rock, and is constituted by an underwater rotary drive device 31 and a rotary cutter 32 as an underwater crushed rock portion. In place of the underwater hammer described above, a rotary drive device 31 is attached to the crushing part holding cylinder 10a below the inner cylinder part, and a rotary cutter is attached to the tip of the output shaft of the rotary drive device 31.
32 is installed. Other configurations are shown in FIGS.
This is similar to the illustrated embodiment. In order to move the rock-crushing part horizontally, a combination of the hoisting operation of the hoisting boom 5, the telescopic operation of the catch hawk 6, the up-and-down operation of the inner cylinder part 10 and the rotary drive device 31, and the turning operation of the crane, if necessary, are performed. , It can be moved horizontally with the hull fixed.

(Effect of the Invention) As described above, according to the present invention, unlike the conventional weight drop type, the rock breaking part such as a hammer is operated in water, so noise is not transmitted to the outside, and the positioning and depth of the rock breaking part. The setting is accurate, the chisel angle can be set arbitrarily, and a wide range of rock breaking is possible with the hull fixed. In addition, the drive unit of the underwater crushed rock part is attached so that it can slide up and down with respect to the holding cylinder provided in the lower part of the inner cylinder of the telescopic mast mechanism, so that the impact force due to the impact of the drive unit is transmitted to the telescopic mast mechanism. In addition, the mast mechanism is not damaged, and the impact caused by the impact is not transmitted to the swing crane, so that the swing of the crane does not occur. Therefore, the crushed rock portion can be accurately brought to the work position. In the weight-crushed rock, the crushing energy decreases remarkably due to the resistance of water when the weight falls, but in the present invention, the crushing force can be maintained regardless of the water depth. In addition, it takes about 1 minute per hit with the conventional crushed crushed rock, but with the underwater crushed rock method of the present invention, it is possible to hit 100 to 150 times per minute, which significantly improves work efficiency. Many effects are brought about.

[Brief description of drawings]

FIG. 1 is an overall side view of a seabed rock crushing device according to one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is III-III of FIG. FIG. 4 is a cross-sectional view taken along the line, FIG. 4 is a partial side view of another embodiment of the present invention, and FIGS. 5 and 6 are schematic side views of a conventional weight crusher. 1 ... Hull, 2 ... Swivel type crane, 5 ... Ring boom, 6 ... Catch hawk, 7 ... External cylinder part, 8 ... Extension mast hoisting machine, 9,11 ... Suspension wire, 10 ...... Inner cylinder part, 10
a …… Crushed rock holding cylinder, 12 …… Underwater hammer, 15 …… Concave guide, 16 …… Guide rail, 18 …… Underwater hammer holder,
31 …… Underwater rotation drive device, 32 …… Rotary cutter.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography SHO 56-154490 (JP, U) RIE 60-91693 (JP, U) ACT 61-84789 (JP, U)

Claims (4)

[Scope of utility model registration request] 1. A slewing crane mounted on a hull, and a hoisting boom provided on the slewing crane so as to be hoistable.
A telescopic mast mechanism consisting of an outer cylinder pivotally attached to the hoisting boom and an inner cylinder that can be moved in and out from the lower end of the outer cylinder; and a swingable crane that is hoistably provided and pivotally attached to the lower portion of the outer cylinder. A telescopic boom, a holding cylinder fixed to a lower end of the inner cylinder, and a slidable vertical holding on a side portion of the holding cylinder and hanging from a hoist on the swing crane via an upper end of the outer cylinder. A drive unit for operating the lowered underwater crushed rock portion, an underwater crushed rock portion mounted on the drive unit, a drive source provided on the hull side and supplying power to the drive unit, the outer cylinder and the inner cylinder And a guide portion that is provided between the inner cylinder and the inner cylinder to prevent the inner cylinder from rotating and guide the vertical movement thereof. 2. The submarine bedrock according to claim 1, wherein the driving unit for operating the underwater crushed rock portion is an underwater hammer, and the underwater crushed rock portion is a chisel operated by the underwater hammer. Crushing device. 3. A drive unit for operating the underwater crushed rock portion is an underwater rotary drive device, and the underwater crushed rock portion is a rotary cutter driven by the underwater rotary drive device. Submarine bedrock crushing device according to paragraph. 4. The seabed rock crushing device according to claim 1, wherein the inner cylinder is suspended by a wire from a hoisting machine held at the upper end of the outer cylinder. .