JPS5927621B2 - Impact crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an impact crusher having a fixed striking plate, and in particular, a rotor equipped with a striking plate on the circumference is rotated forward and backward, thereby reducing the frequency of replacing the striking plate. This invention relates to an impact crusher that can be used on both sides of the crushing surface, thereby significantly improving the operating rate of the machine.

This type of impact crusher can be broadly divided into a hammer-shaped crusher and a crusher in which a striking plate as in the present invention is fixed to a rotor. The two types are distinguished by the method of attaching the striking plate to the rotor.The hammer type has a small striking plate attached rotatably around the rotor with a pin, and the striking plate is rotatably attached to the rotor as the rotor rotates. Each striking plate rotates around a pin, and the rotation of the striking plate crushes the object just like a hammer would smash the object.

In this way, the force applied to the striking plate in the case of the hammer type is
Only a repulsive force is applied when the object collides with the object to be crushed, and no impact force is applied.Therefore, there is no cracking of the striking plate due to the impact force, so the rotor is rotated forward and backward to crush the object.

On the other hand, in the case of a type in which the striking plate is fixed to the rotor, an impact force acts on the striking plate, so the mounting method of the striking plate must be such that the striking plate will not break even if this impact force acts on the striking plate. ing.

As shown in FIGS. 1 and 2, the conventional mounting structure for a striking plate includes a striking plate seat 2 having the same length as the striking plate 1 on the rotational circumference of the rotor 5. The impact plate 1 is firmly fixed to the impact plate 2 by fitting with bolts 3 or uneven portions 4, and the rotor 5 is rotated in the direction of arrow A to reduce the impact applied to the impact plate 1 when crushing the object to be crushed. The force was received by the striking plate receiver 2.

As a result, the rotor 5 can only be rotated in one direction, and when the striking plate 1 is worn out, the machine must be stopped, the bolt or the fitting portion of the unevenness released, and the striking plate replaced.

Therefore, while the striking plate is being replaced, the machine is at rest, which has the disadvantage of reducing the operating rate of the machine.

However, in the case of the above-mentioned hammer type, the pins that rotatably support the striking plate are severely worn due to the dust generated inside the crusher, so they must be replaced frequently, and the pins have to be replaced frequently. There were a large number of them, and their structure was troublesome to replace, requiring a long time to replace, and the operating rate of the machine was also reduced.

Furthermore, wear of the striking plate is an unavoidable problem unique to crushers, and it is recognized that replacing the striking plate will naturally reduce the operating rate of the machine. It is.

The present invention aims to improve the deficiencies of both of the above-mentioned types of crushers and to provide an impact type crusher that completely changes the perception of impact type crushers.

That is, the present invention improves the mounting structure of the striking plate, eliminates the rotating part using a pin like a hammer type, solves the problem of impact force applied to the striking plate, and prevents crushing due to forward and reverse rotation of the rotor. This makes it possible to reduce the number of times the striking plate needs to be replaced, and the striking plate has striking heads at the front and rear ends and protrusions on both sides to form a symmetrical shape. One of the striking heads protrudes from the rotor and loosely fits into a notch groove provided from the peripheral surface of the rotor made of a plate toward the rotor axis, and the protruding portion is locked in the recess provided in the notch groove. This prevents the striking plate from being pulled out of the notched groove due to centrifugal force, and since the striking plate is loosely fitted into the notched groove, the impact force on the striking plate is buffered, allowing the rotor to rotate in both forward and reverse directions. Furthermore, when one of the striking heads becomes worn out, the other striking head can be used to crush it.

Hereinafter, details of the present invention will be explained with reference to embodiments shown in the drawings.

FIG. 3 is a diagram showing the entire embodiment of the impact type crusher of the present invention. In the figure, the rotor (striking plate holding member) 5 is made up of a plurality of thick plates, and the rotor 5 is connected to a casing (not shown) by a rotor main shaft 8 that passes through the center and is fixed to the rotor 5. ). A plurality of striking plates 1 are arranged radially and at regular intervals on the circumferential surface of the rotor 5.
is retained. Reference numeral 7 denotes an input hole for the material to be crushed, which is provided in a shape symmetrical to the rotor main shaft 8 directly above the rotor 5, and a hole 7 on the lower inner surface of the input hole 7 is located at a position symmetrical to the input port, i.e. An introduction plate 10 is provided at a symmetrical position with respect to the rotor 5, and a grinding plate 6 whose upper end is swingably supported by a pin 9 is provided at a symmetrical position on both sides of the rotor 5.

The lower end of this grinding plate 6 is designed to move around a pin 9, and the gap between the grinding plate 6 and the striking plate 1 is adjusted according to the particle size of the crushed product, and the grinding plate has a predetermined particle size. We are starting to get the product.

That is, the material to be crushed supplied from the material supply port 7 is first crushed by the rotating striking plate 1, and then ground in the gap between the grinding plate 6 and the striking plate 1. Ru. In addition, 10 in the figure is an introduction plate. The striking plate 1 and the striking plate holding member 5 are connected by fitting a protrusion 11 provided on the striking plate 1 into a recess 15 provided on the striking plate holding member 5, as shown in FIGS. 4 and 5. There is.

In this fitting part, the notch groove 16 provided in the striking plate holding member 5 and the recess 15 provided in this notched groove 16 are made somewhat larger than the thickness of the striking plate 1 and the protruding part 11, and the striking plate 1
When it is fitted into this fitting part, it is in a loose state.

In the figure, 12 is a stopper for preventing the striking plate 1 from coming off from the striking plate holding member 5, 13 is a stopper piece for the stopper 12, and 14 is a pin 17 of the stopper 12 that is aligned with the end of the striking plate 1. This is a cutout. Note that the protrusion 11 provided on the striking plate 1 may be partially protruded from the fracture surface of the striking plate 1 as shown in FIG. 4, or may be a long protrusion as shown in FIG. Good too.

The use of these two depends on the size of the crusher, and as shown in FIG.
In a large-sized crusher with a large impact force, the protrusion 11 is a continuous long protrusion to maintain the strength of the striking plate 1 against impact force. Further, in this embodiment, the protrusions 11 are provided in two stages symmetrically on both side crushing surfaces of the striking plate 1, but the invention is not limited to this.

The operation of this embodiment configured as above will be described in detail below.

The material to be crushed is first introduced through an input port 9 provided directly above the crusher. Here, the material collided with the impact plate 1 of the rotor 5 which is rotated at high speed by the rotor main shaft 8 is then repulsed again by the introduction plate 10 and is forcibly fed in the direction of the friction plate 6. Due to this high speed rotation,
The striking plate 1, which is loosely attached to the rotor (striking plate holding member) 5, is caused by centrifugal force to cause the protrusion 11 to move into the recess 15.
Becomes suspended in the air while being pulled to the ground. This suspended state is created by the mass of the striking plate 1, the radius of the rotor 5, and the rotational speed of the rotor 5, so that a sufficient centrifugal force is applied to the striking plate 1 to maintain the object even if the object to be crushed collides with the striking plate 1. It is designed to do so. Therefore, when the object to be crushed collides with the striking plate 1, the impact force is damped.

Next, the wear condition of the striking head of the striking plate 1 will be explained.
As shown in Fig. 6, when the wear amount a of the striking head of the striking plate 1 exceeds a certain value (13 mm or more), slippage occurs between the object to be crushed and the striking surface, and the crushed particle size decreases significantly and the impact The wear of the striking head of the plate 1 increases at an accelerated pace.

When the wear amount a exceeds a certain value, the rotor 5 is rotated in the reverse direction as shown in FIG.

In other words, as shown in Fig. 5, the wear surface C (normal rotation), the wear surface D
(reverse rotation), worn surface E (normal rotation), worn surface F (reverse rotation), and is crushed while performing normal rotation and reverse rotation. The switching timing between normal rotation and reverse rotation is performed, for example, on the order of one or two days. In this way, when one of the striking heads of the striking plate 1 becomes worn out and becomes unusable, the striking plate 1 is reversed and replaced (X-+Y in Fig. 5), and the forward and reverse rotations are repeated in the same way. However, it is crushed.

In the above-mentioned crushing process, as shown in FIG. 7, in the case of a large crusher with a large width W of the striking plate holding members 5, an impact force as indicated by the arrow Z is applied to the striking plate 1. In this case, the striking plate 1 may crack as shown by the two-dot chain line V.

The protrusion 11 is designed to serve as reinforcement against such impact force. As can be seen from the above description, according to the present invention, the striking plate is loosely fitted into the rotor (the striking plate holding member), and the striking plate is suspended by the centrifugal force generated by the rotation of the rotor. This eliminates the impact force applied to the rotor, eliminates the conventional striking plate receiver, and eliminates a rotating part such as a hammer-shaped crusher in which the striking plate is rotatably supported by a pin. By making crushing possible, the frequency of replacing the striking plate can be greatly reduced, and the operating efficiency of the machine can be greatly increased.Furthermore, by providing a protruding part on the striking plate, It has great effects, such as maintaining sufficient strength against the impact force applied to the plate and preventing cracking of the striking plate.

In addition, due to the action of the introduction plate 10, the input hole 7 is located directly above the rotor 5.
Even if the material is provided, the material is smoothly fed in the direction of the friction plate 6,
The crushing efficiency is further improved, and the crusher structure can be simplified by making the casing structure more symmetrical.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing the conventional mounting structure of the striking plate;
Fig. 3 is a diagram showing the entire impact type crusher according to an embodiment of the present invention, Fig. 4 is a perspective view partially showing the mounting structure of the striking plate, and Fig. 5 further shows the mounting part of the striking plate. An enlarged view showing the state in which the striking plate is inserted into the rotor (battering plate holding member) and the state of wear of the striking plate. Figure 6 is an explanatory diagram of the wear of the striking plate. Figure 7 shows the impact applied to the striking plate. It is an explanatory diagram showing the action of force. DESCRIPTION OF SYMBOLS 1...Blow plate, 5...Rotor (blow plate holding member), 8...Rotor main shaft, 11...
...Protrusion.

Claims (1)

[Claims] 1. A rotor consisting of a plurality of thick plates, which holds a plurality of striking plates radially and equally spaced on the circumferential surface of the plurality of thick plates, spanning the plurality of thick plates; In an impact type crusher having grinding plates facing each other with a gap between them, an input hole for the material to be crushed is provided directly above the rotor, and an introduction plate is provided at a position symmetrical to the input port at the lower part of the inner surface of the input port. In addition, the striking plate has a striking head at the front end and the rear end, and protrusions on both sides to form a symmetrical shape, and the striking plate can be loosely fitted into the thick plate from the peripheral surface toward the rotor axis. a notch groove is provided, the striking plate is loosely fitted into the notch groove with one of the striking heads protruding from the rotor, and the protruding portion is fitted into a recess provided in the notch groove. An impact type crusher characterized in that the impact plate is locked to prevent the striking plate from being pulled out of the notched groove due to centrifugal force.