JPS5920351Y2 - Crusher wear detection device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wear detection device for easily determining the amount of wear on a movable crushing plate in a rotary type crusher such as a cone crusher or a shilling crusher.

For example, a conventional cone crusher, as shown in FIG. 1, has an outer crushing plate 4 on the fixed side, which has a substantially truncated conical shape, along an inner conical surface 3 of an upper casing 2 fixed to a lower casing 1.
is attached to the rotating shaft 5, which rotates slightly eccentrically with respect to the center of the upper casing 2, and an inner crushing plate 6 on the movable side having a substantially truncated conical shape is attached.

Therefore, when the inner crushing plate 6 rotates together with the rotating shaft 5 whose rotation center is slightly eccentric, the distance 9 between the surface 7 of the outer crushing plate 4 and the surface 8 of the inner crushing plate 6 changes accordingly, and both crushing plates Objects to be crushed, such as rocks, supplied to the space 10 between the crushing plates 4 and 6 are compressed and crushed between the crushing plates 4 and 6, and as a result, the inner crushing plate 6 is rotated and fixed around the rotating shaft 5. (transfer)

The stress applied to the crushing plates 4 and 6 during this crushing is
.

Therefore, the wear of the crushing plate is generally greatest in this area.

In a cone crusher, as the crushing plates wear out, the upper and lower positions of the inner and outer crushing plates 6 and 4 are generally shifted to shift the position of wear, so the surface shape of the crushing plates after long-term use is as shown in Figure 3. The wear changes as shown by broken lines 23 and 24, and wear becomes complex.

As a result, actual wear is greatest at the portion 11', which is slightly inward from the outlet portion 11.

Also, when viewed in the circumferential direction, there are many cases where a portion is locally worn and the wear limit is reached from that portion.

Such local uneven wear in the circumferential direction of the crushing plate is unavoidable for cone crushers and gyratory crushers that compress and crush rocks etc. between the fixed outer crushing plate 4 and the rotating inner crushing plate 6. Therefore, when uneven wear as described above occurs in even one place, the wear rate in that part is significantly faster than in other places, and in most cases, the uneven wear part is the first to reach the wear limit.

Moreover, it is almost impossible to detect or estimate the position in the circumferential direction where such uneven wear occurs in advance in a cone crusher or a shear crusher in which the inner crushing plate 6 rotates, and in particular, to reduce uneven wear. This is even more difficult for cross-buyers who have installed rotary raw material dispensing equipment to achieve this goal.

Conventionally, in order to know the wear of such a crushing plate, the thicknesses Ll and L2 of the lower end of the crushing plate were measured from the bottom of the crusher to estimate the wear of other parts, or the inner crushing plate 6 was moved in the axial direction. There is a method of electrically measuring the amount of movement until the inner and outer crushing plates 6, 4 come into contact with each other using a cell-syn transmitter or a differential transformer, and estimating the amount of wear from this amount of movement.

However, with the former method, it is not possible to measure the actual amount of wear at the most worn portion.

Furthermore, the latter method not only cannot detect the maximum wear, but also does not detect uneven wear at all, and only detects the total amount of wear on the inner and outer crushed plates, making it impossible to distinguish between uneven wear. .

In addition, as such a wear detection device, a radial through hole is bored in the outer crushing plate 4 in order to detect the amount of wear on the crushing plate, and an electrode is provided in which electric wires are arranged in multiple stages in the depth direction of the through hole. A wear detection device for a crusher (US Pat. No. 3,314,618) is designed to detect the depth of wear by detecting the breakage of the electric wire in the plug, since the electrode plug wears out as the plug is attached and the crushing plate wears. )It has been known.

However, in cone crushers, etc., as mentioned above, wear is often locally unevenly distributed, and it is almost impossible to detect the circumferential position in advance. However, such electrode plugs and switches with multiple contacts to detect broken wires are expensive, and these Providing a large number of crushers significantly increases the overall cost of the crusher.

Also, when detecting wear of the inner crushing plate 6 using the electrode plug as described above, a great deal of inconvenience occurs.

This is because the inner crushing plate 6 continues to rotate during operation, and the connection between the electrode plug provided thereon and the switches outside the crusher poses a problem.

Brushes such as slip rings are normally used to supply power to such rotating bodies, but these wear out quickly and are time-consuming to maintain, especially when used in high-temperature, dusty environments such as crushers. However, the lifespan is shortened, connection failures occur frequently, detection accuracy is reduced, and the device becomes expensive.

Therefore, it is virtually impossible to detect the wear of the inner crushing plate with the device using the electrode plug as described above. For the purpose of easily knowing from a viewpoint whether or not the crushing plate has reached the worn part, an inner crushing plate having a substantially truncated conical shape is eccentrically rotated inside a fixed outer crushing plate having a substantially conical cylindrical shape. In a crusher that compresses and crushes the raw material supplied to the gap between the two crushing plates between the two crushing plates, the inner crushing plate has a radial radial centering center on the axis of the inner crushing plate on the back side of the frequently worn part of the inner crushing plate. A plurality of blind holes are provided, and a wear limit detection material with a color different from that of the inner crushing plate itself is installed in the second blind hole, and when the wear on the surface of the inner crushing plate progresses to the wear limit, the wear limit is detected. The present invention provides a wear detection device for a crusher, characterized in that the material is exposed on the surface of an inner crushing plate.

Next, embodiments embodying the present invention will be described in detail with reference to the accompanying drawings starting from FIG.

Note that the same reference numerals are used for parts common to those in FIG.

Here, FIG. 2 is a side sectional view of the entire crusher including a detection device according to an embodiment of the present invention, FIG. 3 is an enlarged sectional view of the detection device portion in the same embodiment, and FIG. FIG. 3 is an enlarged sectional view of a detection device portion according to the embodiment.

Although the present invention relates to a device for detecting the wear limit of the inner crushing plate on the movable side, it can be similarly applied to the outer crushing plate on the fixed side, so the following explanation will be made for both crushing plates. shall be.

In FIG. 2, the inner crushing plate 6 has a surface 8
A plurality of blind holes 15 facing the direction are bored.

Further, the outer crushing plate 4 is also provided with a blind hole 13 oriented toward the front surface 7 from the back surface 12.

In addition, the inner crushing plate 6 also has a blind hole 15 facing toward the front surface 8 from the back side 14.
have.

Based on experience, a plurality of blind holes 13, 15 are provided radially in the circumferential direction around the axis 16 of each crushing plate on the back side of the part where the amount of wear is the greatest.

By arranging a large number of blind holes 13 or 15 in each crushing plate in advance in this way, uneven wear that occurs locally can be quickly detected.

The depths of the blind holes 13 and 15 are determined as appropriate depending on the thickness of the crushing plate, which is the wear limit.

In the figure, reference numeral 17 denotes a push-up plate for tightly fitting the outer crushing plate 4 along the inner conical surface 3 of the upper casing 2, and the bolt 18
is pushed upward by.

Numeral 19 is a nut screwed onto the rotating shaft 5 to press the inner crushing plate 6 against the conical body 20 fixed to the rotating shaft.

To explain the blind hole 13.15 in detail, as shown in FIG. 3, inside the blind hole 13.15 there is a bar-shaped wear limit detection material 21.22 of a color different from that of the material constituting the crushing plates 4, 6.
is installed.

The wear limit detection members 21 and 22 are fixed to the blind holes 13 and 15 by means of adhesive or press-fitting using colored plastic rods or metal rods.

Alternatively, colored liquid plastic may be poured and solidified.

This wear limit detection material may be of a single color, but the blind hole 1
3. You may insert different colors depending on the depth of 15.

For example, the inner parts 21' and 22' are yellow, the entrance part 21'',
For example, 22" may be colored red.

Such a wear limit detection material cannot be visually recognized from the outside until the crushing plates 4 and 6 are not worn much as shown in the third figure.

However, as the wear progresses, the yellow part 21'
Or 22' becomes exposed on the surface of the crushing plate.

This lets you know that the wear limit is near.

Moreover, as the wear progresses further, the red part 21'' or 22''
is exposed, indicating that the wear limit has been reached, so at this point the crushing plate should be replaced.

Wear generally progresses over a certain extent in the vertical direction.

In such a case, it is desirable to arrange blind holes 13, 15 in which wear limit detecting members 21, 22 are fitted in multiple stages as shown in FIG.

With this configuration, any uneven wear occurring in the circumferential direction or the longitudinal direction can be detected.

The embodiment described above is a case of a cone crusher, but
The present invention is applicable to all other types of rotary crushers, such as a shilling crusher, in which the inner crushing plate rotates on its own axis during the crushing operation.

As described above, the present invention involves eccentrically rotating an inner crushing plate having a substantially truncated conical shape inside a fixed outer crushing plate having a substantially conical cylinder shape, and crushing the raw material supplied into the gap between the two crushing plates. In a crusher that crushes under pressure between plates, a plurality of blind holes are provided radially around the axis of the inner crushing plate on the back side of the frequently worn part of the inner crushing plate, and the inner crushing plate itself is inserted into the blind holes. A wear limit detection material of a color different from the color of the inner crushing plate is attached, so that when the wear on the surface of the inner crushing plate progresses to the wear limit, the wear limit detecting material is exposed on the surface of the inner crushing plate. Since this is a wear detection device for a crusher, it is possible to easily and reliably visually confirm that the inner crushing plate has worn out and reached the wear limit without having to take troublesome measurements each time. Even if the wear occurs in a deep part or uneven wear, it can be easily determined whether the wear limit has been reached or not.

In addition, the wear detection material used in this invention does not use expensive parts such as conventional electrode plugs or switches with multiple contacts used with them, but simply uses rod-shaped metal pieces or plastic pieces, so uneven wear can be detected. Even if a large number of wear detection materials are used for this purpose, there is hardly any increase in cost, and unlike electrode plugs, there is no risk of deterioration or damage due to heat or vibration, and maintenance and management are completely unnecessary.

Furthermore, unlike electrode plugs, the present invention does not have the problem of energizing between the wear detection part and the control part such as a switch, so it is possible to detect wear on the rotating inner crushing plate extremely easily and inexpensively, and to prevent slippage. There is no need to consider the lifespan of the ring.

Therefore, when the present invention is used, it is possible to reliably prevent damage to the main body side and fracture spots caused by overuse of the crushing plate.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of a conventional general cone crusher;
FIG. 2 is a side sectional view of the entire cone crusher equipped with a detection device according to an embodiment of the present invention, FIG. 3 is an enlarged side sectional view of the wear detection device portion according to the same embodiment, and FIG. FIG. 2 is an enlarged side sectional view of a wear detection device portion according to another embodiment. 4... Outer crushing plate, 6... Inner crushing plate, 13°15... Blind hole, 21.22... Wear limit detection material.

Claims (1)

[Claims for Utility Model Registration] 1. An inner crushing plate having a substantially truncated conical shape is eccentrically rotated inside a fixed outer crushing plate having a substantially conical cylindrical shape, and the raw material supplied to the gap between the two crushing plates is crushed in both directions. In a crusher that crushes under pressure between plates, a plurality of blind holes are provided radially around the axis of the inner crushing plate on the back side of the frequently worn part of the inner crushing plate, and the inner crushing plate itself is inserted into these blind holes. A wear limit detection material of a color different from the color of the inner crushing plate is attached, so that when the wear on the surface of the inner crushing plate progresses to the wear limit, the wear limit detecting material is exposed on the surface of the inner crushing plate. Wear detection device for crushers. 2. The wear detection device according to claim 1, wherein the wear limit detection member is provided in multiple stages in the vertical direction. 3. The wear detection device according to claim 1, wherein the wear limit detection material has a plurality of colored portions that expose different colors as wear progresses.