JPH08173828A - Solidified mud cracking device - Google Patents

Abstract

PURPOSE: To provide solidified mud cracking device by which solidified mud contg. large lumps such as clay ones is continuously and automatically cracked without working environment pollution. CONSTITUTION: A cracking device is constituted of the 1st hopper 10 having a pair of right and left inclined surfaces 10a for receiving mud, a cracker 20 arranged in the lower part of the 1st hopper 10 for cracking solidified mud, the 2nd hopper 30 and a vibrating screen 40. The cracker 20 is provided with a pair of right and left rotary cutters 21 having cutters 21a freely rotatable around a horizontal shaft with a crashing base 26 in the central part of the crasher 20 being put between them, and solidified mud of large lumps is sandwiched between the cracking base 26 and the cutter blades 21a by compression to cut and crack it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solidified mud crushing device for receiving and crushing large solidified mud containing clay lumps.
In particular, the present invention relates to a solidified mud crushing device for efficiently crushing mud such as a solidified hard large lump of clay.

[0002]

2. Description of the Related Art Conventionally, mud collected by dredging from a port or a river is transported to land and disposed of in a landfill, as shown in FIG. After that, it was used as a roadbed material. That is, in the example of FIG. 6, the mud collected by the dredging ship 120 is carried to the port by the carrier ship (referred to as an earth carrier) 130 and unloaded. In this case, when the clay mass is often mixed in the mud, it is supplied to the mud screen 150 by a loading machine such as a backhoe 140, a shovel loader, or a clamshell, sieved, and adjusted to a desired size. Was transported to a remote place by the mud pumping facility 160. The mud screen 150, as shown in FIG.
It consists of grizzly 152, hopper 154, and vibrating screen 156, and removes foreign matter in mud and decomposes large lumps of clay so as not to hinder the transportation in the mud pumping equipment 160 in the subsequent process. It was intended to be pretreated.

[0003]

However, there is a very hard clay lump mixed in the collected mud, and it is easy to use it by scraping with a loading machine at the time of landing or the impact of free fall into the hopper. There is something that can not be expected to be decomposed, and its size is about 1 m in length, width, thickness (height) or more, and a large lump falling on the grizzle provided on the top of the mud screen Even if it is supplied, it is not easily broken and decomposed and cannot pass through the Grizz River. Therefore, in order to artificially destroy these large lumps, workers manually decomposed them or pressed them against the grizzly surface with a backhoe to compress and crush the clay lumps and let them pass through the grizzly surface. There was a fear of causing another trouble such as damage. In addition, the disintegration of high-pressure water with a water jet inevitably causes the scattering of mud in the surrounding area, which poses a problem of contaminating the work environment.

[0004]

In order to solve such a problem, in the present invention, it is formed by a pair of left and right inclined surfaces and a pair of front and rear vertical surfaces, and a grizzle is arranged on the upper end surface to remove mud. A first hopper for receiving, a crusher disposed below the first hopper for crushing the solidified mud dropped on the first hopper, and a lower discharge port for receiving the mud crushed by the crusher What is claimed is: 1. A solidified mud disintegrating device comprising a second hopper to be discharged further and a vibrating sieve arranged immediately below the second hopper, wherein the disintegrator is provided below an inclined surface of the first hopper. A pair of left and right rotary cutters, which are attached to a horizontal shaft rotatable through a comb-shaped space at equal pitches in the axial direction, are arranged in the left and right, and are arranged in the middle of the pair of left and right rotary cutters. The comb-shaped space through which the cutter blade of the cutter passes A crushing table that is tiltable about a horizontal axis and that is held substantially horizontally by a hydraulic cylinder is provided, and both rotary cutters are rotated in a direction that passes through the crushing table from above to below. It was configured. Further, in the second aspect of the invention, a control device for tilting the crushing table by giving an operation command to a hydraulic cylinder that supports the crushing table according to the overload state of the rotation driving means of the rotary cutter is further provided. Further, in the third invention, the cutter blade of the rotary cutter has a shape in which the end portion is curved in the rotation direction side.

[0005]

In the present invention, of the mud dropped on the first hopper, for example, a large solidified mud such as a clay lump is loaded on the crushing table arranged at the lower part of the first hopper. However, it is shredded in the vertical direction by the cutter blades of the rotary cutters on both sides to be crushed, subdivided and passed through the comb-shaped space of the crusher, and then discharged from the second hopper via the second hopper. It drops from the outlet onto the vibrating screen, is sieved and sorted, and is transferred by the subsequent transfer means according to the particle size. When foreign matter such as rocks and iron pieces that cannot be crushed exists in the thrown mud, the rotation of the rotary cutter is blocked, so the operation of the rotary cutter is stopped and the foreign matter is removed from the upper end of the first hopper. Alternatively, it may be considered that a worker removes it with a pick or a breaker, but it is configured as in the second aspect of the invention to detect the overload of the rotary drive means (for example, an electric motor or a hydraulic motor) of the rotary cutter, and control the controller. The hydraulic cylinder that supports the crushing table is operated via the
Drop into a hopper and vibrating sieve and remove foreign matter from the mud by sieving. On the other hand, in the third invention, when crushing a large amount of solidified mud that has fallen and accumulated on the crushing table, the cutter blade end of the rotary cutter is curved in the rotation direction side to surely crush the solidified mud. Since it is gripped on the crushing table, the crushing work proceeds smoothly.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 relate to an embodiment of the present invention,
1 is an overall side view of the solidified mud disintegrator, FIG. 2 is a longitudinal sectional view of a main part of the disintegrator, FIG. 3 is a plan view taken along the line AA of FIG. 2, and FIG. 4 is a view taken along the line BB of FIG. 5 is a vertical sectional view of FIG. 5, and FIG. 5 is a side view taken along the line CC of FIG. As shown in FIGS. 1 and 2, the solidified mud disintegration device 100 is arranged in the lower part of the first hopper 10 and a first hopper 10 having a grid-shaped or parallel bar-shaped grizzly 12 on the upper end surface thereof. The crusher 20 includes a crusher 20, a second hopper 30 that receives the crushed mud, and a vibrating screen 40 that is disposed immediately below the second hop 30. The crusher 20 is shown in FIG.
As shown in FIG. 4, a pair of left and right rotary cutters 21 are symmetrically arranged with the disintegration table 26 in the center, and the pair of left and right rotary cutters 21 are axially supported by bearings 23, 23 at both ends. A plurality of cutter blades 21a are fixedly mounted on the horizontal shaft 22 at regular intervals in the axial direction, and a chain wheel 22a attached to one end of the horizontal shaft 22 is rotated in the rotation direction shown in FIG. Driven. Therefore, as shown in FIG. 5, comb-shaped spaces 10c are formed in the lower portions of the inclined surfaces 10a, 10a on both sides of the first hopper 10 so that the cutter blade 21a can pass therethrough.

On the other hand, the crushing table 26 has bearings 28, 28 at both ends.
A central portion is tiltably supported by a horizontal shaft 27 that is pivotally supported by, and a plurality of comb-shaped spaces 26a having the same width at equal pitches that allow the cutter blades 21a to pass through are held on both sides.
One end of the horizontal shaft 27 is pin-joined to the piston rod of the hydraulic cylinder 29 via a lever 29a, and the crushing table 26 is normally held in a horizontal state. As shown in FIG. 4, the cross-sectional shape of the crushing table 26 and the cutter blade 21a is formed in a T-shape, and the upper surface of the crushing table 26 and the cutter blade 21a are pinched, cut and fragmented. The mud behind is a comb-shaped space 2
6a is easily passed and it is made difficult to adhere to the side wall of the crushing table 26. Solidified mud disintegrating device 1 of the present invention
In 00, the purpose is to disintegrate a large amount of solidified mud, and for example, when the grizzly sieve mesh is 1000 mm, about 10
Since a large lump of 00 mm or less is dropped into the first hopper 10, the axial distance between the horizontal shaft 27 and the horizontal shaft 22 is also set to about 1000 mm, and the radius of the cutter blade 21a is 8 mm.
00 mm, the length of the disintegration table 26 is 1000 mm to 14
The range is 00 mm.

The operation of the solidified mud crushing apparatus 100 of the present invention equipped with the crusher 20 constructed as described above will be described. The mud supplied onto the grizzly 12 of the first hopper 10 passes through the grizzly 12 (a large solidified mud larger than the grizzly sieve that cannot pass through the grizzly 12 is artificially crushed and dropped), Crushing table 2 below the first hopper 10
6 through the comb-shaped space 26a or the comb-shaped space 10c provided on the inclined surface 10a of the first hopper 10 and the second hopper 30 to be screened and screened by the vibrating screen 40, and the subsequent transfer according to the particle size. It is conveyed by means. The above is a fragmented mud of mud, for example,
A large solidified mud such as a clay mass passes through the grizzly 12 and then falls and accumulates on the crushing table 26, and cannot pass through the first hopper 10 as it is. At this time, always low speed (for example, 1
Rotating cutter 21 which is rotationally driven at 0 to 50 rpm)
The large solidified mud sandwiched between the cutter blade 21a and the crushing table 26 is vertically cut and crushed by the cutter blade 21a,
It is subdivided, crushed, dropped from each comb-shaped space 26a, transferred to the vibrating screen 40 and screened as described above.

In such a case, when rocks, iron pieces, wood pieces, and other foreign matter that are difficult to disintegrate are mixed in a large amount of solidified mud, the cutter blade 21a impedes smooth rotational movement and serves as a rotational driving means. An overload is applied to power means such as the electric motor 24 or a hydraulic motor that replaces it. Therefore, in order to remove these foreign substances from the first hopper 10, the output value of the power means overloads the preset value, and the rotary cutter 21 is emergency stopped to artificially eliminate these foreign substances. However, it is complicated to remove the foreign matter from the mud in the first hopper 10 by stopping the supply of the mud to the first hopper 10, and the productivity is impaired. Then, when a certain overload state is reached, it is recognized as an abnormal state of foreign matter mixture, and an operation command is sent to the hydraulic cylinder 29 that holds the crushing table 26 horizontally via the control device to crush. The rotary cutter 21 on the side showing the overload abnormality
The foreign matter on the disintegration table 26 was dropped and eliminated by inclining and descending in the direction of. The vibrating screen 40 is used to remove the fallen foreign matter.
It was decided to carry out the screening. In the solidified mud disintegration device equipped with such a control device, foreign matter can be removed without stopping the operation of the device, so that complicated work is unnecessary and continuous operation becomes possible, and the mud disintegration process is performed. Work efficiency is also improved.

Further, in the third invention, the cutter blade 21a
The tip of the slab is curved to the forward side in the rotation direction, so that the large solidified mud accumulated on the crushing table 26 can be more reliably gripped to improve the efficiency of the crushing work.

[0011]

As described above, in the apparatus for crushing solidified mud of the present invention, a large mass of solidified mud in mud is continuously and
Not only can it be carried out automatically and efficiently, but it is also possible to efficiently remove uncrushable foreign substances mixed in the mud. In addition, it is possible to maintain a good working environment without scattering of mud, and it is possible to effectively collect mud, resulting in a high resource saving effect.

[Brief description of drawings]

FIG. 1 is an overall side view of a solidified mud crushing device according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a main part of the crusher of the solidified mud crushing device according to the embodiment of the present invention.

FIG. 3 is a plan view taken along the line AA of FIG.

FIG. 4 is a vertical cross-sectional view taken along the line BB of FIG.

5 is a side view taken along the line CC of FIG.

FIG. 6 is a schematic side view of a conventional mud pressure feeding device.

FIG. 7 is a schematic perspective view of a conventional mud screen.

[Explanation of symbols]

 10 1st hopper 10a Sloping surface 10b Vertical surface 10c Comb space 12 Grizzly 20 Crusher 21 Rotating cutter 21a Cutter blade 22 Horizontal shaft 22a Chain wheel 23 Bearing 24 Electric motor 26 Crushing table 26a Comb space 27 Horizontal shaft 28 Bearing 29 Hydraulic Cylinder 29a Lever 30 Second hopper 40 Vibrating sieve 100 Solidified mud crushing device 120 Dredger 130 Carrier carrier 140 Backhoe 150 Mud screen 152 Grizzly 152a Grizz river 154 Hopper 156 Vibrating sieve 156a Sieve net 160 160 Mud pressure feeding equipment

Claims (3)

[Claims] 1. A first hopper which is formed of a pair of left and right inclined surfaces and a pair of front and rear vertical surfaces, and is provided with grizzles on its upper end surface to receive mud, and a first hopper provided below the first hopper. A crusher for crushing the solidified mud dropped on the hopper, a second hopper for receiving the mud crushed by the crusher and discharging it from a lower discharge port, and a second hopper arranged directly under the second hopper A solidified mud disintegrator comprising a vibrating screen, wherein the disintegrator passes through a comb-shaped space formed below the inclined surface of the first hopper and is rotatable on a horizontal shaft with an axially equally spaced pitch. A pair of left and right rotary cutters mounted on the left and right are arranged in the middle of the pair of left and right rotary cutters, and a comb-shaped space through which the cutter blades of the both cutters pass is provided on both left and right sides to form a central portion. Can be tilted around a horizontal axis, and the horizontal axis can be held almost horizontally via a hydraulic cylinder. A solidified mud crushing device comprising a crushing table, and both rotary cutters are rotated in a direction of passing through the crushing table from above to below. 2. The consolidation according to claim 1, further comprising a control device that tilts the crushing table by giving an operation command to a hydraulic cylinder that supports the crushing table according to an overload state of the rotary driving means of the rotary cutter. Mud shredding equipment. 3. The solidified mud crushing device according to claim 1 or 2, wherein the cutter blade of the rotary cutter has an end curved in the direction of rotation.