JPS61268361A - Multistage tubular crusher - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a multi-stage tubular crusher.

(Prior art) A water-stagnant gravel layer containing coarse gravel (cobblestones) using a telescopic pump using a telescopic cylinder with a crushing valve, that is, a conveying device for high-concentration gravel and mud, which the inventors have already researched and developed. In the case of shields for underground tunnels, a consolidation mechanism using a combination of a scree conveyor, a ribbon scree conveyor, and an earth removal gate is used to isolate the face from the mine. This was achieved by compressing and draining the plastically fluidized discharged soil produced by kneading with the soil, thereby stopping the water and maintaining the water pressure of the face. Therefore, if it is not possible to immediately correct changes in the properties of the earth and sand due to sudden changes in the soil quality of the face, or if the balance of these earth removal relationships is broken due to the opening of the earth discharge gate to take out large lumps, etc. If the inside of the mine was not shut off, it would no longer be possible to support the earth water pressure at the face, and there was a risk that this could lead to an eruption of the earth at the face. In order to solve these problems, the inventors of the present invention have already developed a system that enables excavation of earth and sand in a state where the face and the inside of the mine are always mechanically isolated. Furthermore, by transporting earth and sand up to the top of the shaft via pipes, prevention of ground eruption, balance between excavated earth and discharged earth, face, and maintenance of earth pressure water.

Problems with respect to the conveyance of blocks of the full diameter of the transport pipe have been solved. However, the transportation device (telescopic pump) for highly concentrated gravel and mud that can be set up has space limitations depending on the shield diameter, and the diameter of the transportation pipe is also inevitably limited.

For this purpose, as shown in Figure 1, the front surface of the face of the shield body 21 can be cut with a disc cutter or the like.
This is dealt with by crushing the emerging cobbles so that they can pass through the pipe, and by controlling the diameter of the inflowing cobbles in the chamber through the opening of the cutter face filler 22, and taking in only the cobbles that can be transported. was. For this reason, since the mass of the conveying pipe 27 is full of diameter, there are disadvantages in that the pumping resistance is large, power loss is large, and there is also a large risk of pipe clogging.

However, with this method, the crushing of large chunks occurs at the face.
Since the cutting is carried out by taking reaction force from the face ground, and in the case of blocks that cannot pass through the opening of the cutter face plate 22, re-crushing is performed between the ground and the cutter face plate 22, so that it is not possible to stabilize the ground. This results in the destruction and agitation of the face ground that needs to be excavated, and due to the transfer of jobs, uneven wear and damage to the disc cutter that maintains its crushing function will occur.It will also increase the wear of the single-faced disc. but,
Furthermore, they interfere with each other and the vicious cycle is amplified, resulting in various problems.

In some cases, replacing the disc cutter by reinforcing the face ground, reinforcing the cutter face filler 22, etc. may result in construction delays and dangerous work.

(Technical Problem) Therefore, the present invention can be applied to various purposes such as multi-stage crushing of lumps during the transfer of general earth and sand and other various materials, is relatively simple and compact, has a large crushing ratio, is appropriate, rational, and powerful. The present invention aims to provide an effective multi-stage tube crusher capable of crushing materials to solve the above-mentioned problems in the prior art, and to realize an improved shield system.

(Technical Means) The present invention has been made to solve the above-mentioned technical problems, and the multi-stage tubular crusher of the present invention will be described in detail with reference to drawing examples.

In Figure 1-4' of the drawing, l is a circular tube body having seven flanges 2 at both ends, and a shaft having guides t at equal intervals qO degree negative angular displacement t in the center and guides t around the outside. A long and narrow through hole 3 is bored in each direction. Each through hole 3 at one location is provided with a crushing blade having a cutting edge 5a on the inner edge and a slope portion 6 having a groove-like engaging portion Oa shown in FIG. 3 on the outer edge. 5 are inserted through each other so as to be slidable in the radial direction. 7 is operated by a reciprocating linear motion prime mover IO such as a plurality of cylinders outside the pipe body l, and the number of W (
The dovetail inserts (a) shown in FIG.
It is a driving shaft whose inner circumference has a conical wedge surface. Therefore, the fittings ga at t locations on the conical wedge surface of the drive shaft 7 are engaged and connected to the engagement portions Oa of the crushing blades S, respectively.

Further, each of the crushing blades j is configured to simultaneously move forward and backward in the radial direction when the driving shaft 7 is moved forward and backward in the axial direction (4') by each prime mover/-0 operation. That is, each crushing blade S is
Based on the principle of wedge action as the driving shaft 7 moves, the direction of movement is changed and the drive shaft 7 moves in the radial direction to perform a crushing action.

Next, as another example of embodiment, FIG. In this case, as shown in FIG. They are arranged at a pitch of 100 degrees. By alternately extending and contracting the left and right prime movers io and io, the left crushing blade 5 and the right crushing blade S can be brought out alternately, and the crushing blades S on both the left and right sides are shifted in phase by //2 pitches. By being
It is possible to crush the lumps that could not be crushed by one (left side) crushing blade S group with the other (right side) crushing blade S group.

Furthermore, in the embodiment shown in FIG.
arm 29 supported by and operated by cylinder 30
In the case of a mechanism in which crushing is performed by appropriately rotating each other while maintaining a torque balance during operation, more effective crushing can be expected than in the case of the embodiments shown in FIGS. 6 and 7.

Furthermore, as shown in Fig. 10, when two crushers of the present invention are connected and operated, as in this case, when the right-hand crusher is crushing coarse crushed lumps, the left-hand crusher does not. By avoiding this, the object to be crushed can be easily and more effectively crushed without being spatially restricted. Even when two or more crushers are connected in multiple stages, it is desirable that each adjacent pair performs the crushing action alternately.

In addition, when the crusher of the present invention crushes a lump of material including large lumps into small lumps smaller than a predetermined size, the crusher effectively crushes the lumps in the transported material while transporting the transported object, and the final In all cases of adjusting the lump size to suit the conveying equipment, for example, lumps appearing during dredging, lumps in excavated earth such as shaft excavation, tunnel excavation, caisson excavation, general earth and sand, and when transferring various other materials. It can be widely applied to cases such as crushing lumps, and furthermore, to crushing lumps while imparting fluidity to non-flowable substances and making them flow.

Next, the crusher of this invention was adopted in a shield that uses a telescopic pump with thalassossing valves /Ia, /fb (D telescopic cylinders /7a, /7b) and a transport device for high-concentration gravel and mud. The basic structure shown in FIG. S will be explained.

The cutter plate 12 at the tip of the shield body has a spoke or similar structure, and has an opening with the maximum gravel diameter that can be swallowed by the ribbon screw /ja in the most advanced maximum diameter conveyance pipe 1tia driven by the drive motor 19a. . Also, A is the first ribbon screw/
3 (1) The crusher of the present invention is installed in the transport pipe 1IIa of the conveyor, and B is installed in the transport pipe /'/-b of the second ribbon screw ljb conveyor driven by the drive motor 19b. This is the same crusher as above.

Further, 15C is a ribbon screw in the third conveyance pipe IIIC connected to the conveyance pipe Ilb, which constitutes the third ribbon screw/3t conveyor driven by the drive motor 19C. The ribbon screw conveyor is equipped with a tallussing valve i.
A telescoping pump lB consisting of telescoping cylinders /76 and /7b with ga and lrb interposed therein is connected. Note that /3 is a segment. Therefore, in the above, the front face of the face,
Each injection hole is provided inside the chamber, inside the first to third screw conveyors, and to the inlet of the telescopic pump.

However, the excavated soil containing large lumps is inside the chamber and in the first
While being kneaded by a screw conveyor, it is sent to a secondary crusher A, where large lumps are crushed. Additives are then injected into the soil whose fluidity and properties have been reduced by crushing the large chunks, using the second screw ribbon conveyor, which kneads and conveys the soil, and then sends the soil to the secondary crusher B. The secondary crusher B crushes the lumps of the next grade, and the third ribbon screw conveyor kneads and conveys them, and the telescopic pump L expands and contracts the earth and sand with a lump diameter and fluidity that can be transported. Also feeds into the dynamic pump. The earth and sand fed into the telescopic pump 1B is transported by pipe to a hopper above the shaft or to a predetermined location. The soil water pressure at the face is completely maintained by the function of the telescopic pump/Otsu. Furthermore, 2 in Figure 1/Fig.
3 is ribbon screw, 2'l is thalassosing valve 2
6a.

2 Telescopic cylinder body with 2 holes interposed! ;tl, 2! ;b is a telescopic pump.

(Effects of the Invention) The crusher of the present invention changes the direction of the axial linear acting force from a linear motion prime mover such as a hydraulic cylinder based on the principle of wedge action, and increases the acting force to apply it to the crushing blades. It has excellent effects such as a large and powerful crushing force can be obtained by the action, and the crushing ratio is large, making it suitable for multi-stage crushing of large blocks. In addition, multiple crushing blades simultaneously move forward and backward in the radial direction to crush large chunks, and the powerful masticating action allows for effective crushing of large lumps.Furthermore, all worn parts can be easily replaced from the outside. It has advantages such as easy maintenance.

When the crusher of the present invention is used in a shield using a transport device (telescopic pump) for conveying highly concentrated gravel and mud, the following characteristics and effects can be obtained.

(1) Equipped with a telescopic pump to maintain water stoppage and to ensure sufficient cross-talk between the additive and the excavated soil.
There is less rotational resistance of the cutter, which reduces wear on the drawing board.

In addition, the excavated soil and discharged soil are balanced, the soil water pressure at the face can be maintained, and there is no eruption of rock, so stable excavation can be maintained.

(2) Since large lumps are not crushed directly at the face, there is no damage to the ground, and the excavated soil is transported in an axial flow, so the discharged soil has a stable flow and there is no strain on the excavation mold. do not have.

(, 3) Since the material can be crushed into small pieces according to the diameter of the conveying pipe, the pumping resistance can be reduced and the fear of blockage is eliminated.

[Brief explanation of the drawing]

The drawings show an embodiment of the crusher according to the invention, in which Fig. 1 is a longitudinal front view, Fig. 2 is a longitudinal side view, Fig. 3 is an enlarged longitudinal sectional side view of the engagement part between the driving wheel and the crushing blade, and Fig. Figure 1 is a vertical sectional front view of the same, Figure S is a vertical sectional view when this crusher is used in a shield using a telescopic pump, Figure 6 is a vertical sectional front view of another embodiment, and Figure 7 is the same. FIG. 9 is a longitudinal sectional side view of another embodiment, FIG. 10 is a longitudinal sectional view showing the operating state, and FIG. 11 is a longitudinal sectional view of a conventional shield. It is 0/00. tube body, 200. Flange, 3000 holes, 0 holes
0. Guide, S06. Crushing blade 1, 5a1. . Blade tip, Otsu 00. Slope portion, 4a, , Fitting portion, 7°0. Driving wheel, za008 conical wedge surface, zaoo, insert, 960. Guide shaft, io,, prime mover, //,,,. Shield body, /2. ,, cutter drawing board, /3. ,. Segment, /'l1l-/lt,,,Transportation vibe,/
! ;a N/3C,,, ribbon screw, #,,,. Telescopic pump, /711. /7. b, , telescopic cylinder, /
ea, igb, , cod flange valve, 19a-1q
c, Drive motor, 2/, Shield body, 22
．． ,, cutter drawing board, 23. ,. Ribbon screw, 2'1. ,, telescopic pump, 2Sa
, 2j; b , , telescopic cylinder, 2ta, 2 osu 0. . Tara flange valve, 27. ,,Transport pipe, 2g00
．． Frame, 2zaoo, ring ring, 29. ,. Arm, 30. ,,Cylinder,A,B,,,Crusher

Claims (1)

[Claims] The tube has a driving wheel having a conical wedge surface on its inner periphery that is moved forward and backward in the axial direction by a reciprocating linear motion prime mover outside the tube body, and a sloped portion that is engaged and connected to the conical wedge surface of the driving wheel. A multi-stage tubular crusher comprising a plurality of crushing blades slidably inserted into through holes, and characterized in that each crushing blade moves simultaneously forward and backward in the radial direction as a driving wheel moves forward and backward in the axial direction.