JPS6244754Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to wear-resistant flexible materials, and is particularly suitable for locations where both flexibility and wear resistance are required.
It also takes into consideration the ease of installation, and therefore its feature lies in the fact that a large number of ceramic balls are embedded and densely spread on the surface of a flexible base material.

An example shown in FIG. 1 is a closed-circuit vertical roller mill equipped with a separator 1 that can perform drying, pulverization, classification, and air conveyance at the same time. As is well known, the main parts of the mill consist of a lower casing 2, an upper casing 3, a crushing table 4, a vertical reducer 5 that rotates the table, a swing lever 6, and a crushing roller 7 attached to it. The separator 1 includes a separator 1 of the type shown in FIG.

The grinding table 4 is rotated by an electric motor via a vertical speed reducer 5, and the four grinding rollers 7 are pressurized onto the grinding table 4 by four hydraulic cylinders 8 housed in the lower casing 2.

The raw material is supplied in a fixed amount from the feed chute 9 provided through the separator case, falls near the center of the table 4, and is blown to the outer periphery by centrifugal force.
and the roller 7 and are crushed.

Hot air for drying and conveying the crushed material is sent from the lower duct by a fan to the blade ring 10 on the outer periphery of the table 4.
The raw material that enters the inside of the mill by being given a swirling force and overflows from the outer periphery of the grinding table 4 is blown up by hot air from the blades. The blown up pulverized material rides on the rising air current and reaches the upper separator 1.
A centrifugal force is applied to the particles by the airflow generated by the rotation of the rotor, and the coarse raw material is blown to the outer periphery and falls onto the table 4 where it is re-pulverized.

In such a roller mill, the swing lever 6 with the crushing roller 7 is removed from the upper casing 3 as shown by the imaginary line in the figure, and if necessary, it is placed in the crushing position as shown by the solid line. is not made into a fixed cylinder as a whole, but only a corresponding part of the outer periphery is opened, and a flexible material 12 with a fitting hole 11, such as a rubber plate, is stretched therein, and thereby the swing This is to ensure that the upper casing 3 is hermetically sealed while allowing free movement.

Although the above objective can be achieved by attaching the rubber membrane plate in this manner, in a mill such as this type in which pulverized materials are processed internally, durability against the pulverized materials, particularly abrasion resistance, is required. On the other hand, flexibility is also necessary.

However, since the conventional flexible material 12 is made of only a rubber plate, it has sufficient flexibility but lacks abrasion resistance. Due to these characteristics, it has not been possible to provide a more effective wear-resistant flexible material.

This invention was made from this point of view, and the purpose is to provide an effective wear-resistant flexible material that can be used in a wide range of applications, including the above-mentioned roller mill and other vibrating sieve screens described below. . The contents of this invention will be explained below with reference to its specific embodiments.

What is shown in FIGS. 2 and 6 is an example devised for the roller mill shown in FIG. 1.

A rubber plate is used as the flexible base material 13, and is formed into an annular shape with a fitting opening 11 in the center as shown in FIG. In this case, the split ring is connected to the connecting plate 14,1
4 is shown as an annular plate, but of course it may be an integral ring plate from the beginning.

As shown in FIG. 2, a large number of spherical ceramic balls 15 made of a wear-resistant ceramic material are embedded in this flexible base material 13 to form a constant width in a planar annular shape corresponding to the width of the ring. There is. That is, the third
As shown in the figure, a large number of ceramic balls 1
5 are densely arranged vertically and horizontally in substantially contact with each other on the surface where wear resistance is required. Therefore, the flexible base material 13 formed in this manner is configured to exhibit flexibility in any direction when viewed from above.

The manufacturing method in this case is to place a large number of ceramic balls in a case 16 and immerse them in an adhesive, as shown in FIG. 4, or to perform spray coating (not shown). As shown in FIG. 5, this contributes to making the bonding properties strong when the flexible base material 13 made of unvulcanized raw rubber is heat-pressed and bonded.

In addition, although the above examples have been shown to be implemented in a roller mill, it is also exemplified here that the invention can also be implemented in the screen 17 of the vibrating sieve shown in FIGS. 7 to 10. Reference numeral 18 denotes particle size control ports of the screen 17, which are arranged in large numbers on the rubber flexible base material 13 itself, and a large number of ceramic balls 15 are embedded in the vertical and horizontal directions on the plane thereof. The illustrated reference numeral 19 is a double-row wire cord having a terminal ring 20 at one end and embedded in the same way. It is attached and buried. In this way, it can be used for various things.

Therefore, in the structure as described above, even if the flexible base material 13 is worn down as shown in FIG. 6, the ceramic balls 15 are exposed and the width of the rubber portion between the ceramic balls 15 becomes narrower, resulting in wear. On the other hand, although the ceramic balls 15 are present, they do not impair their flexibility, and therefore, when implemented in a roller mill as shown in the first figure, they can withstand the pulverized material sufficiently. When the swing lever 6 and the crushing roller 7 are rotated to the outside and accompanied by this, their flexibility is effective. In addition, since a large number of ceramic balls 15 are densely arranged vertically and horizontally in almost contact with each other, the wear-resistant effect can be sufficiently exerted in all directions, regardless of the direction in which the crushed objects collide. Furthermore, the direction in which the flexible member 12 bends is not restricted in any way by the ceramic balls 15, and good flexibility can be exhibited.

As described in detail above, the present invention has a large number of ceramic balls embedded and densely packed on the surface of a flexible base material, so that the following effects are achieved.

First, even if adjacent ceramic balls fixed to a flexible base material contact each other when the flexible material is bent, or even if they are in constant contact, the contact is always a point contact, so it is possible to The bending direction of the flexible member is not restricted in any way by the ceramic balls, and good flexibility can be exhibited.

Furthermore, even if the adjacent ceramic balls are laid in contact with each other instead of being laid apart, there is a flexible base material between the adjacent ceramic balls that acts as a joint, so it is possible to The adhesion strength of the ceramic balls to the flexible base material is high. Therefore, in order to increase the adhesion strength of the ceramic balls to the flexible base material, there is no need to take the trouble of laying the ceramic balls at intervals for joints, and in this point, the manufacturing of the flexible material is improved. It's easy to do.

Furthermore, the inner surface of the ceramic ball embedded portion of the flexible base material is a curved surface and there is no stress concentration, and therefore cracks are difficult to enter from the inner surface of the flexible base material, which reduces the durability of the flexible material. You can improve your sexuality.

Furthermore, since the surface of the flexible base material is covered with ceramic balls without directionality, the flexible material can be manufactured easily in this respect as well.

The present invention has the above-mentioned effects, and the wear-resistant flexible material of the present invention is most suitable for locations where both flexibility and wear resistance are required.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing the entire roller mill equipped with the wear-resistant flexible material according to this invention, and Fig. 2 is a front view showing one embodiment of the flexible material (partially cut away). ), Fig. 3 is a sectional view taken along the - line, Fig. 4 is a front explanatory view showing the procedure for applying the adhesive, Fig. 5 is a sectional view showing the procedure for hot pressing, and Fig. 6 shows the effect of preventing the progress of wear. 7 is a plan view of the vibrating screen, FIG. 8 is a side view thereof, FIG. 9 is an enlarged view of section A in FIG. 7, and FIG. 10 is an enlarged sectional view of section B in FIG. 8. It is. 12... Flexible material, 13... Flexible base material, 15...
Ceramic ball.

Claims (1)

[Scope of utility model registration request] A wear-resistant flexible material characterized by having a large number of ceramic balls embedded and densely spread on the surface of a flexible base material.