JPS5920352Y2 - Back plate structure of rotary crusher - Google Patents

Description

[Detailed description of the invention] The present invention relates to the structure of the back plate of a rotary crusher such as a gyrates crusher or cone crusher. Provided on the back,
This invention relates to a back plate structure that prevents damage to the upper body due to metal flow.

In order to rationalize stone crushing plants, the jaw crushers used as primary crushers are becoming larger year by year, and for this reason, secondary and tertiary crushers such as gyratory crushers and cone crushers are also required to be larger. ing.

FIG. 1 is a front cross-sectional view of such a chamber tractor. Inside the approximately cylindrical upper body 2 placed and fixed on the lower body 1, there is a direction toward the upper raw material supply port 3. Back plates 4 and 5, which expand into a bowl-like shape toward the front, are attached in two divided stages, upper and lower.

A conical mantle surrounded by this back plate and supported at its center rotates eccentrically around the center line 7 of the back plate, forming the space between the back plates 4, 5 and the mantle 6. The raw stone introduced into the crushing chamber 8 from the supply port 3 is crushed by being compressed between the back plate and the mantle.

Since the amount of rotation (eccentricity) of the mantle is greater in the lower part, the lower back plate 5 wears out faster than the upper part.

As the back plate is pressed against the raw material and wear progresses,
The back plate made of a material with high toughness tends to deform due to metal flow.

For this reason, if the back plate is made into an integral structure, there will be no place for the material that tries to extend upward and downward to escape, and internal stress will accumulate, leading to damage to the upper body 2.

From this point of view, in the conventional chassis retractors, the back plate is divided into multiple stages vertically as shown in the figure, and each back plate is also divided into multiple pieces in the circumferential direction to create a back plate using metal flow. In order to accommodate such changes in shape, synthetic resin, zinc, etc. 9 are poured into the gap between the upper body and the back plate, and the back plates 4 and 5 are fixed to the upper body 2. ing.

Therefore, in the conventional back plate structure as described above, the back plate is divided into multiple parts in the circumferential direction, so when the back plate wears out and is replaced with a new one, the split Although it is necessary to mount the back plates side by side, this work is quite difficult and time consuming, and the accuracy of the mounting position of the back plates cannot be very high.

Such problems are common to cone crushers having the same structure as the Jabile L-crusher.

Therefore, the purpose of the present invention is to solve the problems and drawbacks inherent in the conventional rotary crusher as described above, and to solve the problems and drawbacks inherent in the conventional rotary crusher, the back plate surrounding the mantle of the rotary crusher is circularly A plurality of vertical grooves are formed integrally in the circumferential direction and reach approximately the wear limit depth on the outer periphery of the back plate, and a filler made of a flexible material is installed in the grooves. The present invention provides a back plate structure for a rotary crusher having the following characteristics.

Next, an embodiment in which the present invention is applied to a gyratory crusher will be described in detail with reference to the accompanying drawings starting from FIG.

Here, FIG. 2 is a front cross-sectional view of the back plate and mantle portion of a gyrates retractor using a back plate according to an embodiment of the present invention, FIG. 3 is a perspective view of the back plate alone, and FIG. The figure is a front cross-sectional view of the same back plate, and Figures 5 and 6 are A--A in Figure 4.
A sectional view taken along arrow A, a view taken along arrow B, and FIG. 7 are enlarged views taken along arrow C in FIG.

In these figures, reference numeral 10 denotes a lower back plate according to the present invention installed in the upper body 11, which is integrally molded in the circumferential direction and has a roughly cylindrical shape as shown in FIG. is a concave portion 13.13. which is partitioned by a plurality of ribs 12°12, . . . in the vertical direction. ... are formed, and a notch groove 14 in the vertical direction is carved in the center of each of the ribs 12.

As is clear from FIG. 4, the bottom surface 15 of this groove 14 is formed approximately parallel to the shape of the inner curved surface 16 of the back plate 10, and its depth D approximately reaches the wear limit position of the back plate, or It is formed slightly shallower than that.

Then, when assembling the back plate to the body 11, the groove 1
4, a filler 17 made of a flexible material such as synthetic rubber is inserted as shown in FIG.

Such a filler 17 prevents synthetic resin, etc. from flowing into the groove 14 when bonding the back plate 10 to the upper body 11 with synthetic resin, zinc, etc. 18, and also prevents metal flow when the back plate 10 wears. A flexible material is chosen so that it can absorb the deformation caused by and deform itself.

Further, the inside of the recessed portion 13 is filled with mortar 19 or the like to reinforce the back plate from the back side.

When a crusher using the back plate 10 as described above is used for a long period of time, abrasion occurs frequently on the inner surface of the lower back plate 10, especially in the vicinity of the outlet 21 of the crushing chamber 20 between the mantle 6 and the metal The back plate material extended by the flow only deforms the groove 14 provided on the back surface of the back plate and narrows its volume, so that the upward or downward pushing flow of the back plate becomes small and the upper body 11 is The outward expansion force is suppressed to a minimum.

Although the above embodiment describes a gyratory crusher, the present invention is equally applicable to a cone crusher.

As described above, the present invention has a back plate that surrounds the mantle of a rotary crusher that is integrally formed in the circumferential direction, and grooves in the vertical direction that reach approximately the wear limit depth are formed on the outer periphery of the back plate. In addition to having multiple engravings, a filling material that is stronger than flexible material is installed in the grooves, so when replacing the back plate part that is subject to significant wear, it can be easily replaced and installed in a short time. Upon completion, the metal flow due to wear is absorbed by the deformation of the groove, so no damage to the upper body occurs, and the synthetic resin that bonds the back plate to the upper body flows into the groove and is installed in the groove. Since the adhesive is blocked by the filler, the backing plate can be easily bonded.

[Brief explanation of the drawing]

Fig. 1 is a front cross-sectional view of a conventional gyrates recratcher, and Fig. 2 is a front cross-sectional view of the back plate and mantle of a gyrate reclutter using a back plate which is an embodiment of the present invention. , Fig. 3 is a perspective view of the single back plate, Fig. 4 is a cross-sectional view of one side of the back plate, Figs. 5 and 6 are cross-sectional views taken along the line A-A in Fig. FIG. 7 is an enlarged view of a portion viewed from arrow C in FIG. 5. Explanation of symbols, 10... Back plate, 11...
Upper body, 12... Rib, 13... Recessed portion, 14... Groove, 17... Filler,
18... Adhesive, 19... Mortar,
20...Crushing chamber.

Claims (1)

[Scope of utility model registration request] A back plate surrounding the mantle of the rotary crusher is integrally formed in the circumferential direction, and a plurality of grooves in the vertical direction reaching approximately the wear limit depth are carved on the outer periphery of the back plate. A back plate structure for a rotary crusher characterized by having a filler made of a flexible material installed inside.