JPH0349618B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double impact crusher, and more particularly to a double impact crusher designed to prevent raw materials from being shot.

[Prior Art] Conventionally, as a double impact crusher designed to prevent the raw material from being shot, for example, the
A dual impact crusher is known as described in Publication No. 4100.

As shown in Fig. 2, the above-mentioned double impact crusher has the following features:
Upper rotor 4 with a striking member (blow plate) 3 arranged horizontally near the inlet chute 2 in the casing 1
, a lower rotor 6 with a striking member (movable hammer) 5 arranged obliquely below the upper rotor 4 in parallel with the upper rotor 4, and a plurality of crushing chambers 7a, 7b, 7c formed above both rotors 4, 6. A plurality of swingable collision plates 8a, 8b, 8c arranged so as to
It is generally composed of a wedge-shaped anvil 9 disposed below near the gap between the two rotors 4 and 6 adjacent to each other. In this double impact crusher, the raw material (material to be crushed) inputted from the inlet chute 2 is sequentially fed into each of the crushing chambers 7a and 7.
b, 7c, the rotors 4, 6 fall while being crushed by impact crushing by the impact members 3, 5 and collision plates 8a, 8b, 8c, and are discharged as crushed products from the discharge port 10 below the casing 1. Ru. Moreover, the relatively small raw material selected by the striking member 3 of the upper rotor 4 is
6, the upper rotor 4 escapes from the restraint of the striking member 3 due to the action of gravity and centrifugal force, and both rotors 4, 6 are moved without being affected by the lower rotor 6.
The material shot pass from the so-called rotor-adjacent gap, which falls through the adjacent gap, is prevented by the anvil 9.

In FIG. 2, reference numeral 11 indicates a grinding plate that can swing and adjust the gap, and 12 indicates a pivot of the casing 1 that can be opened and closed along the broken line.

[Problem that the invention seeks to solve]

However, in the above-mentioned double impact crusher, although it is possible to prevent the raw material from being shot from the gap adjacent to the rotors, relatively small raw materials selected by the striking member 3 of the upper rotor 4 pass through the gap between the two rotors 4 and 6. Due to the action of gravity and centrifugal force, it is impossible to prevent the raw material from escaping the restraint of the striking member 3 of the upper rotor 4 and falling below the upper rotor 4, a so-called shot path under the rotor. Moreover, it is not possible to prevent relatively small materials from among the raw materials inputted from the inlet chute 2 from falling through the gap between the inner wall of the casing near the inlet chute 2 and the upper rotor 4, which is called a raw material shoot pass from the tip of the inlet chute.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a dual impact crusher which can reduce the top size of product particles by completely preventing the raw material shot pass.

[Means for solving problems]

In order to solve the above-mentioned problems, the dual impact crusher of the present invention has an upper rotor with a striking member disposed horizontally near the inlet chute in the casing, and an upper rotor with a striking member disposed diagonally below and close to the upper rotor in parallel. In a compound impact crusher having a lower rotor and a plurality of collision plates arranged to form a plurality of crushing chambers above both rotors, the inner wall of the casing on the inlet chute side and the vicinity of the adjacent gap between the two rotors A grate is disposed below the upper rotor in between, along the rotation circle of the striking member of the upper rotor, and a closing plate is disposed close to the grate below near the adjacent gap between the two rotors, and below the closing plate. A guide plate is arranged along a part of the rotation circle of the lower rotor's striking member.

[Effect]

In the dual impact crusher of the present invention, relatively small raw materials are introduced from the inlet chute and fall between the inner wall of the casing near the inlet chute and the upper rotor, and as they slide down the upper surface of the grate, they are hit by the upper rotor. The material is subjected to a crushing action by the member, resulting in fine particles that either fall through the grate or are scooped up into the crushing chamber. Also, among the relatively small raw materials carried by the striking member of the upper rotor, those that escape the restraint of the striking member of the upper rotor and fall due to the action of gravity and centrifugal force when passing through the adjacent gap between both rotors. The particles collide with the closing plate and are crushed, and are scattered into the working area of the upper rotor or the lower rotor, or slide down along the upper surface of the closing plate. On the other hand, among the relatively small raw materials carried by the striking member of the upper rotor, those that escape from the restraint of the striking member of the upper rotor due to the action of gravity and centrifugal force after passing through the adjacent gap between both rotors are transported below the upper rotor. Even if it tries to fall, it is prevented from falling by the grate, and is scraped up into the crushing chamber by the striking member of the upper rotor together with the raw material scattered from the closing plate.

Further, the raw material falling from the closing plate is scraped up into the crushing chamber by the striking member of the lower rotor while sliding down along the upper surface of the guide plate. On the other hand, among the relatively small raw materials carried by the striking member of the upper rotor, the material escapes from the restraint of the striking member of the upper rotor due to the action of gravity and centrifugal force just before the adjacent gap between the two rotors, and is released from the action of the lower rotor. The raw material that falls without being hit collides with the guide plate and scatters into the action area of the lower rotor, and is scraped up into the crushing chamber by the striking member of the lower rotor together with the raw material that scatters from the closing plate.

〔Example〕

An embodiment of the dual impact crusher of the present invention will be explained with reference to FIG. In the following description, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof will be omitted.

The inner wall and upper part of the casing 1 on the inlet chute 2 side,
Below the upper rotor 4 between adjacent gaps between the lower rotors 4 and 6, a grate 14 is provided with a large number of conical holes 13 to prevent clogging of raw materials.
are arranged along the rotation circle of the striking member 3 of the upper rotor 4. One side of the grate 14 (the right side in FIG. 1) is attached to the casing 1 with bolts, etc., and the other side is attached to a support rod that is suspended horizontally on the casing 1 parallel to the rotation axis of the upper rotor 4. A closing plate 16 is integrally formed on the other side of the grate 14 and extends substantially perpendicularly to a common tangent to the rotation circles of the striking members 3 and 5 of both rotors 4 and 6. Below the closing plate 16, a guide plate 17 is arranged close to the guide plate 17 along a part of the rotation circle of the striking member 5 of the lower rotor 6. The guide plate 17 is rotatably supported by a shaft 17a, and is rotatably supported by a shear pin 17 in order to prevent damage to the lower rotor 6 etc. when a foreign object such as a piece of iron that is difficult to crush is caught in the guide plate 17.
Its rotation is restricted by b.

Next, the operation of the above configuration will be explained.

A relatively small raw material that is introduced from the inlet chute 2 and falls between the inner wall of the casing near the inlet chute and the upper rotor 4 is moved by the striking member 3 of the upper rotor 4 so as to slide down along the upper surface of the grate 14.
The striking member 3 of the upper rotor 4, except for the one that is crushed by impact and falls from the hole 13 of the grate 14.
is scraped up into the upper crushing chambers 7a, 7b.

Furthermore, among the relatively small raw materials carried by the striking member 3 of the upper rotor 4, when passing through the adjacent gap between both rotors 4 and 6, the action of gravity and centrifugal force allows the material to escape from the restraint of the striking member 3 of the upper rotor 4. The falling objects collide with the closing plate 16 and are crushed by impact, and are scattered into the action area of the upper rotor 4 or the lower rotor 6 or slide down along the upper surface of the closing plate 16. On the other hand, among the relatively small raw materials carried by the striking member 3 of the upper rotor 4, both rotors 4 and 6
After passing through the adjacent gap, objects that escape the restraint of the striking member 3 of the upper rotor 4 due to gravity and centrifugal force and fall below the upper rotor 4 are prevented from falling by the grate 14, and are prevented from falling by the closing plate 16. The impact members 3 of the upper rotor 4 scrape up the raw material together with the raw materials scattered from the crushing chambers 7a and 7b.

Further, the raw material falling from the closing plate 16 is scraped up into the crushing chambers 7b and 7c by the striking member 5 of the lower rotor 6 while sliding down along the upper surface of the guide plate 17. On the other hand, the striking member 3 of the upper rotor 4
Among the relatively small raw materials carried by the rotors 4 and 6, the material escapes from the restraint of the striking member 3 of the upper rotor 4 due to the action of gravity and centrifugal force just before passing through the adjacent gap between the two rotors 4 and 6, and is affected by the action of the lower rotor 6. Objects that fall without being caught collide with the guide plate 17 and fall into the lower rotor 6.
, and is scraped up into the crushing chambers 7b and 7c by the striking member 5 of the lower rotor 6 together with the raw material scattered from the closing plate 16.

In the above embodiment, a case has been described in which the grate 14 and the blocking plate 16 are formed integrally, but the present invention is not limited to this, and both may be formed separately. The three may be formed integrally. Furthermore, Great 14
The hole 13 is not limited to the case where a large number of holes 13 are provided, but may be a grid-like or mesh-like structure, or a structure consisting of a large number of parallel bars.

〔Effect of the invention〕

As described above, the dual impact crusher of the present invention provides the following effects compared to the prior art.

(1) Relatively small raw material falls between the casing inner wall on the inlet chute side and the upper rotor, and is carried by the striking member of the upper rotor, and after passing through the adjacent gap between both rotors, it is transported to the upper part by the action of gravity and centrifugal force. Relatively small raw materials that escape the restraint of the rotor's striking member and fall are prevented from falling by the grate, except for those that fall through the holes in the grate, and are transported into the crushing chamber by the striking member of the upper rotor. Since the material is scraped up, it is possible to prevent a so-called raw material shoot pass from the tip of the inlet chute and a raw material shoot pass under the rotor.

(2) Relatively small materials that are carried by the striking member of the upper rotor and fall due to the action of gravity and centrifugal force, escape from the restraint of the striking member of the upper rotor immediately before and when passing through the adjacent gap between the two rotors. , collides with the blocking plate and the guide plate, is crushed, and is scattered into the action area of one of the rotors, and is scraped up into the crushing chamber by the impact member.
It is possible to completely prevent raw material shot passing from the so-called rotor-adjacent gap.

(3) The raw material falling from the blocking plate is scraped up into the crushing chamber by the striking member of the lower rotor while sliding down along the upper surface of the guide plate, thereby preventing the so-called raw material short pass under the rotor in the lower rotor. be able to.

(4) (1), (2), and (3) can completely prevent all raw materials from being shot, so the top size of the product particle size can be reduced.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the dual impact crusher of the present invention, and FIG. 2 is a cross-sectional view showing a conventional dual impact crusher. 1...Casing, 2...Inlet chute, 3...
...Blowing member, 4...Upper rotor, 5...Blowing member, 6...Lower rotor, 7a, 7b, 7c...Crushing chamber, 8a, 8b, 8c...Collision plate, 14...Grate, 16... Obstruction board, 17...information board.

Claims (1)

[Claims] 1. An upper rotor with a striking member arranged horizontally near the inlet chute in the casing, a lower rotor with a striking member arranged diagonally downward and close to the upper rotor in parallel, and a plurality of crushing chambers formed above both rotors. In a double impact crusher having a plurality of impact plates arranged to A blocking plate is arranged near the grate below the adjacent gap between the two rotors, and a guide plate is arranged below the blocking plate in a part of the rotating circle of the striking member of the lower rotor. A dual impact crusher characterized by being arranged along the line.