JP4771406B2 - Wet crusher - Google Patents

Description

  The present invention relates to a wet crusher used in a muddy water shield method.

In general, when performing a muddy water shield construction method at a site where gravel is present in a natural ground, it has been mainstream to use a wet jaw crusher having fixed teeth and moving teeth as a crusher.
However, since the jaw crusher intermittently crushes, there is a problem that the efficiency is low in terms of processing capability.

Further, in the fields of the muddy water shield method and the crushed stone, a wet roll crusher having a rotating crushing tooth that rotates only in a certain direction and a fixed crushing tooth that cooperates with the rotating crushing tooth is also used.
However, in a conventional roll crusher that rotates only in one direction, only the front part of the rotating crushing tooth and fixed crushing tooth in the rotation direction is always used, and the crushing part (chip) is worn out relatively early. Resulting in. When the amount of wear increases and the gap between the rotating crushing teeth and the fixed crushing teeth exceeds the gap adjustment allowance, the part (chip) must be replaced.

Since the replacement operation of such parts is complicated and may cause a delay in the progress of the work, there is a demand for reducing the frequency of replacement of parts as much as possible.
On the other hand, it is conceivable to use a material with a small amount of wear in order to reduce the replacement frequency, but such a material is expensive and leads to an increase in the cost of the entire construction, which is not preferable.
Therefore, there is a demand for a technique that extends the life of rotating crushing teeth and fixed crushing teeth and reduces the frequency of component replacement due to wear.

Other conventional technologies include, for example, a technique in which excavated soil generated at the face is mixed with mud water and discharged to the outside through the mud drain line while crushing the underground excavated soil with a crusher while holding the face by mud pressure. It has been proposed (see Patent Document 1).
However, with such a technique, it is difficult to convey the fluid to the outside of the shaft, and it is not possible to extend the life of the rotating crushing teeth or the fixed crushing teeth and reduce the frequency of parts replacement due to wear.
JP 2000-303791 A

  The present invention has been proposed in view of the above-mentioned problems of the prior art, and wet crushing that extends the life of worn parts (fracturing teeth) and reduces the replacement frequency without lowering crushing efficiency. The purpose is to provide a machine.

  The wet crusher of the present invention has an inner wall facing a rotating crushing tooth (1) fixed to the outer periphery of a rotating shaft (3) and a fixed crushing tooth (2) cooperating with the rotating crushing tooth (1). (4i, 4i) and a wet crusher (100) provided in a casing (4) having an upper fluid inlet (5) and a lower fluid outlet (6), the rotary shaft has a cross-sectional shape of 6 The rotating crushing teeth (1) are formed by alternately stacking a plurality of relatively large-diameter outer rotating bits (11) and a plurality of relatively small-diameter inner rotating bits (12) on the rotating shaft (3). The fixed crushing teeth (2) are configured to have a plurality of outer fixed bits (21) provided at positions corresponding to the outer rotating bits (11) and a plurality of inner fixed bits provided at positions corresponding to the inner rotating bits (12). (22) and alternately overlap in the longitudinal direction parallel to the rotation axis (3) The fixed crushing tooth (2) is configured with a plurality of positions (in FIG. 2) substantially symmetrical with respect to a vertical axis (vertical axis Y in FIG. 2) including the rotation center of the rotating crushing tooth (1). The outer rotating bit (11) and the inner rotating bit (12) are each divided into three parts (the shape of the disk in which the shaft insertion hole is formed is divided into three parts). 121), chips (112, 122) having a cemented carbide (K) are provided at the center of the outer periphery of each part (111, 121), and the inner surface of each part (111, 121) has a regular hexagonal cross section. The parts (111, 121) are fixed to the rotating shaft (3) with two mounting bolts (113, mounting bolts for part 122 are not shown), and are adapted to the outer surface of the rotating shaft (3). Each inner wall (4i, 4) of the casing (4) ) Is formed with a shoulder portion (42) for preventing the object to be crushed (M) from bouncing back, and the fixed crushing tooth (2) can adjust the gap (reference numeral δ in FIG. 9) with the rotating crushing tooth (1). The rotating crushing tooth (1) can be rotated in either forward or reverse direction (clockwise or counterclockwise as indicated by arrow β in FIG. 2), and can be crushed in both forward and reverse rotation directions. It is characterized by having a function of crushing an object (M: for example, lump or gravel mixed in earth and sand).

  According to the present invention having the above-described configuration, since it is a continuous crushing machine with rotating crushing teeth (1) and fixed crushing teeth (2), there is no wasted operating time in terms of processing capacity, and it is efficient. The density in the discharged fluid of the material to be crushed (M: lump or gravel mixed in the earth and sand) becomes substantially constant.

Further, in the crusher (100) of the present invention, an object to be crushed (M: a lump or gravel mixed in the earth and sand) can be crushed in both forward and reverse rotations (region 41L and region in FIG. 2). Because the clearance adjustment function can no longer be exhibited due to wear of the rotating crushing teeth (1) and the fixed teeth (2), the rotation direction of the rotating crushing teeth (1) is reversed. The crushing is performed by the portion that is not used in the rotating crushing tooth (1) and the fixed crushing tooth (2) that has not contributed to crushing until then.
Therefore, it becomes possible to crush the object to be crushed (M) at the parts (bits 11 and 12) where the crushing teeth are not worn in both the rotary crushing teeth (1) and the fixed crushing teeth (2). It becomes possible to extend the lifetime of both the rotary crushing teeth (1) and the fixed crushing teeth (2).

  As described above, the crushing tooth portions (bits 11 and 12) acting in one rotation direction may be reversed after being worn, but the rotation direction is reversed every predetermined time in the operation of the crusher (100). Even if it is made (alternate operation by time), the life can be extended.

Here, in the crusher, it is required to efficiently introduce a material to be crushed (a lump or gravel mixed in the earth and sand) into the crushing portion. Crushing the material to be crushed to a size that does not require crushing not only increases the load on the prime mover (driving machine) that drives the crusher, but also promotes wear of crushing teeth, This is because it also greatly affects the wear.
However, in the conventional crusher, not all the objects to be crushed (such as lump and gravel mixed in the earth and sand) are crushed, and the object to be crushed does not enter between the rotating crushing teeth and the fixed crushing teeth. As shown in FIG. 4, there is a case where the group moves and stays on the input side (so-called “auction” state). Alternatively, as shown in FIG. 5, at the moment of crushing, there is something that rebounds to the input side of the object to be crushed.

  On the other hand, in the present invention, the object to be crushed (inside the casing 4) (M: lump or gravel mixed in the earth and sand) is a region between the rotating crushing tooth (1) and the fixed crushing tooth (2) ( If a mechanism (shoulder 42 or projection in FIG. 2) for guiding to the region 41L and the region 41R in FIG. 2 is provided (Claim 3), the object to be crushed up or jumped up to the input side ( M) can be induced between the rotating crushing teeth (1) and the fixed crushing teeth (2). Therefore, it is possible to satisfy the condition required for the crusher “to efficiently introduce the material to be crushed into the crushing part”.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
In the drawings, similar members are denoted by the same reference numerals, and redundant description is omitted.

1 and 2 schematically show the configuration of the wet crusher 100 of the present invention.
As shown in FIG. 3, the crusher 100 according to the present invention is disposed behind the excavating machine (or shield machine) 50 (at the tuyere 60 side) and on the face side in front of the earth and sand discharge pump 70 during construction of the muddy water shield method. Used in position. Here, in the muddy water shield method, the above-described devices are connected by pipes 80 (water supply line) and 90 (discharge line) to form a closed circuit.

Since the wet crusher 100 is used in the muddy water shield construction, it is necessary to endure the use in the presence of muddy water. In order to meet such a need, a seal structure bearing is employed so that muddy water does not enter the bearing.
Further, since muddy water enters the inside and pressure acts (for example, a pressure of 1 MPa acts on the inside), the entire mechanism has a pressure resistant structure.
Further, the pipe 80 communicating with the crusher 100 has a hermetic structure because muddy water is pumped by a pump (not shown).

1 and 2, the wet crusher 100 has a casing 4, a rotary crushing tooth 1, and a fixed crushing tooth 2, and the rotary crushing tooth 1 has both ends at the longitudinal ends of the casing 4 and the casing 4. It is fixed to a rotating shaft 3 that is pivotally supported by a bearing 30 provided in the middle in the height direction.
A fluid inlet 5 is formed above one end face in the longitudinal direction of the casing 4, and a fluid outlet 6 is formed below the other end face in the longitudinal direction.

The earth and sand containing lumps and gravel excavated by the shield machine 50 shown in FIG. 3 passes through the fluid inlet 5 of the wet crusher 100 and is guided between the rotary crushing teeth 1 and the fixed crushing teeth 2, The gravel M is crushed to a size less than the specified size, and is sent to the earth and sand discharge pump 70 shown in FIG.
Here, the rotating shaft 3 is driven by a motor (or hydraulic motor) (not shown). On the other hand, the fixed crushing tooth 2 has a gap adjusting mechanism. The clearance adjustment mechanism will be described later with reference to FIG.

  As shown by the arrow β in FIG. 2, the rotating shaft 3 to which the rotating crushing tooth 1 is fixed is configured to be rotatable in both the clockwise direction and the counterclockwise direction (both forward and reverse directions) in FIG. 2. Therefore, the rotary crushing tooth 1 can also rotate in the clockwise direction and the counterclockwise direction (both forward and reverse directions) in FIG.

  As shown in FIG. 2, the cross-sectional shape of the casing 4 is substantially symmetrical with respect to the vertical center line Y. The inner wall 4i of the casing 4 is gradually widened in three steps from above, and the widest wall surface gradually decreases in width toward the center of the cross section as it descends downward from substantially the same height position as the rotary shaft 3. An inclined surface 4s is formed.

  Reference numerals 41L and 41R in FIG. 2 include a part of the inclined portion 4s, and are portions for crushing a lump or gravel M, which is an object to be crushed, and a space between the rotating crushing tooth 1 and the fixed crushing tooth 2. Show.

  As shown by an arrow β in FIG. 2, it is configured to be rotatable in both the clockwise direction and the counterclockwise direction (both forward and reverse directions), and a vertical axis including the rotation center of the rotating crushing tooth 1 (FIG. 2). Are provided at a plurality of positions (two left and right in FIG. 2) that are substantially line-symmetric with respect to the vertical axis Y). For this reason, there are also two regions, a region 41L and a region 41R shown in FIG.

In other words, in the crusher according to the illustrated embodiment,
(1) Rotate only in either the clockwise or counterclockwise direction in FIG. 2 to crush the object to be crushed M such as lumps and gravel in one of the areas 41L and 41R, and rotate crushing teeth 1 and / or if the fixed crushing teeth 2 are worn, rotate in the opposite direction, or
(2) The rotation direction of the rotating crushing tooth 1 or the rotating shaft 3 is alternately switched clockwise and counterclockwise in FIG.
By adopting any of the methods, there is an effect that the life of the rotating crushing tooth 1 and the fixed crushing tooth 2 can be extended (prolonged).

  In order to be able to rotate both in the clockwise direction and in the counterclockwise direction in FIG. 2 and to change the rotation direction, for example, the rotation direction can be set as a rotation drive source of the rotating crushing tooth 1 or the rotation shaft 3. A switchable prime mover may be employed. Alternatively, even if the rotational direction of the rotational drive source is only one direction, a transmission capable of reversing the rotational direction is interposed in the transmission system that transmits the rotation from the rotational drive source to the rotary crushing tooth 1 or the rotational shaft 3. It ’s fine. In addition, it is possible to freely switch the rotation direction of the rotating crushing tooth 1 or the rotating shaft 3 to both the clockwise direction and the counterclockwise direction in FIG. 2 using known and commercially available means.

Here, in the dry crusher as shown in FIG. 14, for example, the crusher 110 installed on land, the lower part of the crusher 110 is open. For example, a crushed earth and sand conveyor belt conveyor 120 is provided. It is set below the opened portion 111 of the crusher 110. The upper part of the crusher 110 constitutes a chute or hopper 112.
Also in the dry crusher as shown in FIG. 14, there is an example in which when a jam (rotation stop due to catching) occurs in the crusher, the crusher is reversed to eliminate the jam.

  However, the illustrated embodiment is characterized in that crushing is performed not only when jamming is resolved but by either clockwise rotation or counterclockwise rotation indicated by symbol β in FIG. In other words, the dry crusher configured as reversible as shown in FIG. 14 does not crush lump or gravel at the time of reverse rotation, but according to the illustrated embodiment, regardless of the rotation direction, Lumps, gravel, etc. mixed in the earth and sand can be crushed.

The inner wall 4i of the casing 4 of the crusher is denoted by reference numeral 42 in FIG. 2 (four places in FIG. 2; only two places are shown in FIG. 2) in order to prevent the mass (M) from bouncing when crushing. Such a shoulder (the aforementioned widened corner or protrusion) is provided.
In order to crush the object to be crushed M (such as lump or gravel mixed in excavated earth and sand), the gap between the rotating crushing tooth 1 and the fixed crushing tooth 2 (region 41L and / or region 41R in FIG. 2) It is necessary to push into.

By providing the shoulder portion 42, as shown in FIG. 4, it is possible to prevent the object to be crushed M such as gravel to be crushed from competing upward.
Or as shown in FIG. 5, it is prevented that the big to-be-crushed object (lump etc.) M jumps up. In FIG. 5, a bent arrow Yk indicates a trajectory when an object to be crushed (a lump or the like) M that has risen at one end falls downward by the shoulder 42.
Here, instead of the shoulder portion 42, a protrusion or a convex portion may be formed inside the casing 4.

The details of the rotary crushing tooth 1 and the fixed crushing tooth 2 are shown in FIGS.
FIG. 6 shows a state where the rotary crushing teeth 1 and the fixed crushing teeth 2 (only one of the fixed crushing teeth 2 is shown in FIG. 6) are viewed from above in FIG.
In the figure, reference numeral 3c denotes the center of a rotating shaft (not shown).
As apparent from FIG. 6, the rotary crushing tooth 1 includes a plurality of relatively large-diameter outer rotating bits 11 and a plurality of comparatively small-diameter inner rotating bits 12 in the longitudinal direction (in the direction of arrow L in FIG. 6). ) Alternately stacked. The fixed crushing teeth 2 also include a plurality of outer fixed bits 21 provided at positions corresponding to the outer rotating bits 11 and a plurality of inner fixed bits 22 provided at positions corresponding to the inner rotating bits 12. It is configured by alternately overlapping in the direction. In other words, the same number of outer fixed bits 21 as the outer rotating bits 11 and the same number of inner fixed bits 22 as the inner rotating bits 12 exist.

In FIG. 6, in order to prevent the fixed crushing teeth 2 formed by alternately stacking the outer fixed bits 21 and the inner fixed bits 22 in the longitudinal direction from moving in the longitudinal direction L, A plurality of bolts 13 are provided. The fixed bit lateral movement preventing bolt 13 presses both ends of the bit assembly via a pair of pressing plates 15 to restrain the movement of the bit assembly in the longitudinal direction.
Details of the outer rotating bit 11 are shown in FIG. 7, and details of the inner rotating bit 12 are shown in FIG.

As described with reference to FIG. 2, the object to be crushed M such as a lump or gravel to be crushed is guided and crushed in the regions 41L and 41R between the rotating crushing tooth 1 and the fixed crushing tooth 2, The space | interval of the rotation crushing tooth 1 and the fixed crushing tooth 2 in these area | regions 41L and 41R is comprised so that adjustment is possible. Specifically, the fixed crushing tooth 2 is configured to be movable in the horizontal direction H in FIG. 2, and the interval between the rotary crushing tooth 1 and the fixed crushing tooth 2 is adjusted.
FIG. 9 shows a mechanism for moving the fixed crushing teeth 2 in the horizontal direction H in FIG. 2 and adjusting the distance from the rotating crushing teeth 1 (symbol “δ” in FIG. 9).

In FIG. 9, on the side of the fixed crushing tooth 2 away from the rotary crushing tooth 1 (right side in FIG. 9), a “cushion bolt” (adjuster bolt) 23 for moving the fixed crushing tooth 2 in the horizontal direction H. Is provided. Although not clearly shown in the figure, one “cushion bolt” (adjuster bolt) 23 is provided for each of the plurality of outer fixed bits 11 and the inner fixed bits 12.
In the casing 4, an adjustment groove 4 n for the fixed crushing teeth 2 is formed at a position slightly below the center point 3 o of the rotating shaft 3 in the vertical direction. The fixed crushing teeth 2 are configured to slide along the groove 4n along the horizontal direction H (left and right in FIG. 9).

For example, when the fixed crushing tooth 2 is worn and the interval δ increases, the “crush bolt” 23 is rotated in the “pushing” direction, and the fixed crushing tooth 2 is moved to the left in FIG. Thus, the interval δ can be kept at an appropriate value.
The fixed crushing teeth 2 can move within a range of 10 mm to 40 mm, for example. In other words, the gap δ between the rotary crushing teeth 1 and the fixed crushing teeth 2 can also be adjusted corresponding to 10 mm to 40 mm.
In FIG. 9, a two-dot chain line indicates the position of the fixed crushing tooth 2 after the gap adjustment.

  In addition, both the rotary crushing tooth 1 and the fixed crushing tooth 2 crush the to-be-crushed object M such as lump or gravel. The tip described in detail below shows only the portion (blade edge) indicated by hatching in FIG. It is made of material K.

Next, the rotating crushing tooth 1 will be described with reference to FIGS.
In the illustrated embodiment, the outer rotating bit 11 (FIG. 7) has three parts 111 fixed to the rotating shaft 3 with two mounting bolts 113 each. On the other hand, the inner rotating bit 12 (FIG. 8) has three parts 121 fixed to the rotating shaft 3 with mounting bolts (not shown).
In the part 111 of the outer rotating bit 11, a tip 112 is formed so as to protrude in the radial direction when fixed to the rotating shaft 3. Similarly, in the part 121 of the inner rotary bit 12, a tip 122 is formed so as to protrude in the radial direction when fixed to the rotary shaft 3.
The hatched portions of the chips 112 and 122 are made of super hard material K. 7 and 8, reference numeral K <b> 2 indicates a cemented carbide material provided on the fixed crushing tooth 2.

In FIG. 10, the above-described chip is denoted by reference numeral 112, and is configured in a line-symmetric shape with respect to a radial axis (axis Y in FIG. 10) passing through the center of the chip 112.
The tip 112 is configured in a line-symmetric shape with respect to the radial axis Y passing through the center thereof, and by providing portions made of the carbide material K on both sides of the axis, the tip 112 can be clockwise or counterclockwise in FIG. Even if rotated (in both forward and reverse directions), the cemented carbide material K of the tip 112 is used to cooperate with the cemented carbide material K2 of the fixed crushing tooth 2 (see FIG. 8 and FIG. 9). It breaks up.

Here, the chip shape of the crushing bit will be described with reference to FIGS.
FIG. 11 shows the chip shape of the crushing bit in the illustrated embodiment. In the shape of FIG. 11, only the hatched portions K on both sides are made of super hard material. And it collaborates with the super hard material part (hatching part K2 of FIG. 7) of the fixed crushing tooth | gear 2, and crushes the to-be-crushed objects M, such as a lump and gravel mixed in earth and sand.
In the example of FIG. 11, since the entire chip is not made of super hard material, material costs and manufacturing costs can be suppressed. Further, the corners of the portion K made of super hard material are configured to have an obtuse angle so that the corners of the portion K are relatively difficult to chip.

  In FIG. 12, the entire chip 112D is made of a super hard material K, and its cross-sectional shape is rectangular. In this shape, there is a high possibility that the corner C of the chip is missing. In other words, the carbide tip 112D is hard, but the right-angled corner C is easily chipped.

  In FIG. 13, the entire chip 112E is made of a super hard material K, and the cross-sectional shape thereof is a semicircular or curved cross section. In the cross-sectional shape of FIG. 13, there is little risk that the long hard tip 112 </ b> E is chipped, but it is difficult to make only one part of the tip a super hard material. Therefore, the chip 112E of FIG. 13 has a problem that the entire bit must be formed of the carbide material K, and the manufacturing cost becomes high.

  As described above, both the outer rotating bit 11 (FIG. 7) and the inner rotating bit 12 (FIG. 8) have three “parts” 111 (FIG. 7) and 121 (FIG. 8) having chips 112 and 122 for crushing. A group of three forms one bit. The super hard material K is brazed to “parts” 111 and 121 other than the super hard material. The “parts” 111 and 121 other than the cemented carbide are integrally formed.

As is apparent from FIGS. 7 and 8, the cross-sectional shape of the rotating shaft 3 is a regular hexagon.
In the conventional wet crusher, the cross-sectional shape of the rotating shaft is, for example, a dodecagon, and the cross-sectional shape is close to a circle.
However, if the cross-sectional shape is close to a circle, the inner peripheral surface of the part provided with the crushing tip slides on the outer peripheral surface of the rotary shaft, so the rotary shaft has the function of holding the part (with the tip). It was relatively weak.
On the other hand, in the illustrated embodiment, since the cross-sectional shape of the rotating shaft 3 (of the rotating crushing tooth 1) is configured as a hexagon, the inner peripheral surfaces of the parts 111 and 121 including the crushing tips 112 and 122 are provided. 111 i and 121 i are securely engaged with the outer peripheral surface of the rotating shaft 3. That is, the force for holding the parts 111 and 121 including the crushing tips 112 and 122 to the outer peripheral portion of the rotating shaft 3 is increased.

In addition, when the cross-sectional shape of the rotating shaft 3 is formed into a quadrangular shape, the shape of the inner peripheral side (the side engaging with the outer peripheral surface of the rotating shaft 3) of the part provided with the crushing tip becomes complicated. Therefore, the processing is difficult.
That is, in the illustrated embodiment, the cross-sectional shape of the rotating shaft 3 is such that the parts 111 and 121 provided with the crushing tips 112 and 122 can be reliably engaged on the outer peripheral surface, and the processing of the part is performed. A hexagonal (cross-sectional) shape was adopted to simultaneously satisfy the condition of not being too complicated.

In FIG. 7, as described above, the part 111 is fixed (fastened) to the rotating shaft 3 with two fixing bolts 113 for each part.
If only one fixing bolt 113 is used, considering the shearing force acting between the part 111 having the chip for crushing and the rotating shaft 3 and the torque to be transmitted to the part 111 side, the strength is severe. On the other hand, if three bolts 113 are used for one part, the structure becomes complicated.

Conventionally, a fastening bolt is inserted from a direction parallel to the rotating shaft 3 (a direction perpendicular to the paper surface in FIG. 7), and the outer rotating bit and the inner rotating bit are fastened to the rotating shaft.
In such a configuration, when replacing the crushing tip, in order to take out the outer rotating bit or the inner rotating bit provided with the tip to be replaced, it is first necessary to remove the rotating shaft.
However, if the rotating shaft is pulled out, much labor is required to replace the chip and reassemble it.
On the other hand, in the illustrated embodiment, if the part fastening bolt 113 inserted in the radial direction in FIG. 7 is removed, the part 111 provided with the tip 112 to be replaced can be taken out. That is, since the crushing tip 112 can be replaced without removing the rotating shaft 3, it is possible to remarkably reduce the labor spent on replacing the worn crushing tip 112.

  The bolt 113 is illustrated for the outer rotating bit 11 of FIG. 7, but is similarly provided for the inner rotating bit 12 shown in FIG.

Here, in FIG. 7, the insertion hole 114 of the bolt 113 (fastening the part 111 to the rotating shaft 3) is sealed so as to seal the insertion hole 114 with a caulking material (not shown) after the bolt 113 is inserted.
As described above, in order to easily remove the bolt 113 when the worn tip 112 is replaced, the bolt 113 is composed of a hexagon socket head bolt. It is sealed with caulking material so that mud does not enter this hexagonal hole.
The structure of sealing the insertion hole with a caulking material after inserting the bolt into the insertion hole of the bolt that fastens the part to the rotating shaft 3 is the same for the inner rotating bit 12 of FIG.

1 and 2 again, a screen 8 is provided between the fluid inlet 5 and the rotary crushing tooth 1 in order to classify the objects M to be crushed such as lumps and gravel contained in the fluid. Yes.
If the diameter is small enough to pass through the screen 8, crushing by the rotating crushing teeth 1 and the fixed crushing teeth 2 is not performed. Therefore, in the rotary crushing tooth 1 and the fixed crushing tooth 2, a region where the teeth are not worn is generated depending on the location where the screen 8 is provided.
Reference numeral 7 in FIG. 1 is a support member for providing the screen 8.

  A plurality of support members 7 are provided, and most of the fine particles go farther from the object to be crushed M by the screen 8, so if the position of the screen 8 is sequentially moved from the left side to the right side in the drawing and attached, It can be efficient against wear.

  It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

Sectional drawing explaining the structure of the wet crusher which concerns on embodiment of this invention. The XX cross-section arrow figure of FIG. The schematic diagram explaining the mechanical apparatus of a muddy water shield construction method. The fragmentary sectional view explaining the structure which prevents the auction of the to-be-crushed object which concerns on embodiment. The fragmentary sectional view explaining the bounce prevention of the to-be-crushed object by the structure for preventing the to-be-crushed object according to the embodiment. The figure which showed the state which looked at the rotation crushing tooth and the fixed crushing tooth from the upper direction of the wet crusher which concerns on embodiment. The figure explaining the structure of the outer rotation bit of a rotation crushing tooth according to the embodiment of the present invention. The figure explaining the structure of the inner rotation bit of a rotation crushing tooth in connection with embodiment of this invention. The fragmentary elevational view explaining the adjustment mechanism of the fixed crushing teeth according to the embodiment of the present invention. The figure explaining the structure of the chip | tip in the rotation bit of a rotation crushing tooth according to embodiment of this invention. The front view which shows one Example of the shape of a chip | tip concerning embodiment of this invention. The front view which showed the 1st modification of the shape of the chip | tip concerning embodiment of this invention. The front view which showed the 2nd modification of the shape of the chip | tip concerning embodiment of this invention. The schematic diagram which showed the principal part of the dry crusher in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rotary crushing blade 2 ... Fixed crushing blade 3 ... Rotating shaft 4 ... Casing 5 ... Fluid inlet 6 ... Fluid outlet 7 ... Support member 8 ... Screen DESCRIPTION OF SYMBOLS 11 ... Outer rotating bit 12 ... Inner rotating bit 23 ... Push / pull bolt / adjuster bolt 100 ... Wet crusher 111, 121 ... Part 112, 122 ... Chip 113 ... Mounting bolt 114 ... Insertion hole K ... Carbide

Claims (1)

The rotating crushing tooth (1) fixed to the outer periphery of the rotating shaft (3) and the fixed crushing tooth (2) cooperating with the rotating crushing tooth (1) are connected to the opposing inner walls (4i, 4i) and the upper part. In a wet crusher (100) provided in a casing (4) having a fluid input port (5) and a lower fluid discharge port (6), the rotary shaft has a regular hexagonal cross-sectional shape and a rotary crushing tooth (1 ) Is formed by alternately stacking a plurality of relatively large-diameter outer rotating bits (11) and a plurality of relatively small-diameter inner rotating bits (12) on a rotating shaft (3). ) Includes a plurality of outer fixed bits (21) provided at positions corresponding to the outer rotating bits (11) and a plurality of inner fixed bits (22) provided at positions corresponding to the inner rotating bits (12). 3) Alternately stacked in the longitudinal direction parallel to and fixed Teeth (2) are provided at a plurality of positions substantially symmetrical with respect to a vertical axis including the rotation center of the rotating crushing tooth (1), and each of the outer rotating bit (11) and the inner rotating bit (12) A chip (112, 122) having three parts (111, 121) divided into three parts, and having a cemented carbide (K) at the center of the outer periphery of each part (111, 121) is provided. The inner surface of 121) is shaped to fit the outer surface of the rotating shaft (3) having a regular hexagonal cross section, and each part (111) is formed by two part fastening bolts (113) inserted radially into the rotating shaft (3). , 121) is fixed to the rotating shaft (3), and shoulders (42) are formed on the inner walls (4i, 4i) of the casing (4) to prevent the object to be crushed (M) from bouncing back. The crushing tooth (2) has a gap (δ ) Can be adjusted, the rotary crushing tooth (1) can be rotated in either the forward or reverse direction (β), and the object (M) can be crushed in either the forward or reverse rotation direction. A wet crusher characterized by having a structure.

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