JPS6239316B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure in which a wear-resistant plate made of alumina porcelain or the like is attached to a metal covered body such as a duct for treating dust-containing gas or the like.

The inner surface of a metal duct or the like (covered body) for processing dust-containing gas or the like is easily abraded by dust, so the inner surface is lined with a wear-resistant material.

Conventional bonding structures include, for example, bonding and fixing a wear-resistant plate to a metal covering body such as a steel plate using an adhesive, or attaching bolts to a steel plate (covering body) as shown in Figure 1. The structure is such that a slate plate or the like is fixed using a fixing device such as a nut, and a wear-resistant plate is adhered to the slate plate or the like using an adhesive.

In such a bonded structure, if the dust-containing gas is at a temperature of several hundred degrees, the adhesive may deteriorate, or the adhesive at the joint may be selectively abraded, causing the wear-resistant plate to deteriorate prematurely. They often fall off and wear resistance rapidly decreases.

Additionally, as shown in Figure 2, there is a bonding structure in which the wear-resistant plate is directly attached to the adherend using bolts and nuts; As a result, they rapidly lose their holding power due to wear from their heads, and in order to prevent chipping or cracking of the wear-resistant plates, the tightening pressure of the bolts and nuts must be adjusted to an appropriate level. There is a problem in that the positions of the holes in the adherend and the wear-resistant plate must be accurate in order to avoid overlapping.

Therefore, the present invention provides an easy way to attach a wear-resistant plate to a metal covered body without drilling holes.
It is an object of the present invention to provide a bonding structure for wear-resistant plates that can be made reliably and firmly, and whose holding power does not deteriorate even at high temperatures.

In order to solve the above-mentioned problems, the present invention provides a metal adherend, and a wear-resistant plate having stepped holes and brought into contact with the surface of the adherend with an inorganic fibrous elastic body interposed therebetween. a ring inserted into the stepped hole, one end of which is welded to the adherend, and a flange provided at the other end pressed into contact with the engaging portion of the stepped hole; and a recessed portion of the stepped hole. The structure consists of a wear-resistant lid that fills the cover, and the wear-resistant plate is attached to any position on the adherend by a ring welded to the adherend, and the wear-resistant plate and the cover It is held with an appropriate tightening pressure by the inorganic fibrous elastic body interposed between the body and the flange of the ring.

An embodiment of the present invention will be described below with reference to the drawings.

In Fig. 3, 1 is a dense alumina porcelain wear-resistant plate with a stepped hole in the center.
was brought into contact with the metal covering body 2 with an inorganic fibrous elastic body 5 having a thickness of about 2 mm interposed therebetween, and was also inserted into the stepped hole and one end welded to the covering body 2. By press-contacting the flange portion 4 provided at the other end of the ring 3 to the engaging portion 7 of the stepped hole, the metal adherend 2
It is attached to. 8 is a cover made of wear-resistant alumina porcelain to protect the top surface of the fixing ring 3 from dust, and is fixed using adhesive to fill the recess 6 of the stepped hole (see Figure 4). has been done.

To obtain the above-mentioned bonding structure, for example, as shown in FIG. The ring 3 is inserted into the stepped hole provided in the center of the ring, and the flange portion 4 is pressed into contact with the engaging portion 7 of the stepped hole, so that the tip of the ring 3 is attached to the metal covered adherend. 2, and then the lid 8 is embedded in the recess 6 of the stepped hole using an adhesive.

When welding the ring 3, there is a possibility that the engagement part 7 of the wear-resistant plate 1 with the flange part 4 will break, but the elastic body 5 is interposed between the wear-resistant plate 1 and the metal adherend 2, Since the position of the wear-resistant plate 1 can be slightly displaced in the vertical direction, cracking does not occur.

Note that the shape of the ring 3 is not limited to that shown in FIG. 3, and various modified shapes such as those illustrated in FIG. It is necessary to have a flange portion 4 that can engage with the engaging portion 7 of the hole.

Further, as shown in FIG. 6, the ring 3 is divided into a ring portion 3a and a flange portion 4a, and the adherend 2
The flange portion 4a may be fixed to the ring portion 3a welded to the ring portion 3a by screwing.

FIG. 7 shows an example in which the inorganic fibrous elastic body 5 has a wall thickness of, for example, about 40 mm in order to have a heat insulating effect, but it is generally made of silica-alumina, rock wool, etc. The inorganic fibrous elastic body 5 has the disadvantage that it contracts when exposed to high temperatures. For this reason, if the ring 3 is simply pipe-shaped, the contraction of the elastic body 5 may cause the wear-resistant plate 1 to wobble. 9
It is preferable to provide

Note that the wear-resistant plate 1 may be made of silicon carbide other than alumina porcelain.

As described above, according to the present invention, it is possible to weld the ring to any position on the adherend, so there is no need to drill holes at precise positions on the adherend, etc., as in the past. This makes it easy to attach the wear-resistant plate.

In addition, since the wear-resistant plate is held with an appropriate tightening pressure by the elastic body and the flange of the ring interposed between the wear-resistant plate and the adherend, cracks do not occur at the engaging portion of the stepped hole. It is possible to reliably and firmly adhere the adhesive to the adherend without causing any scratches.

Furthermore, since the concave portion of the stepped hole is filled with a wear-resistant lid, the holding force will not deteriorate rapidly due to wear of the head even at high temperatures.

[Brief explanation of the drawing]

1 and 2 are schematic sectional views showing conventional embodiments, and FIGS. 3 to 7 show embodiments of the present invention,
Figure 3 is a schematic sectional view, Figure 4 is an assembled perspective view of Figure 3, Figures 5A, B, C, and D are perspective views showing other ring-shaped embodiments, and Figure 6 is a ring section FIG. 7 is a schematic cross-sectional view showing another embodiment in which flange portions are combined. FIG. 7 is a schematic cross-sectional view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Alumina porcelain wear-resistant plate, 2...Metal covered body, 3...Ring, 3a...Ring part, 4
... Flange, 4a ... Flange portion, 5 ... Inorganic fibrous elastic body, 6 ... Concave portion, 7 ... Engaging portion, 8 ...
...Lid, 9...Protrusion.

Claims (1)

[Claims] 1 A metal covered body, a wear-resistant plate having a stepped hole and brought into contact with the surface of the covered body with an inorganic fibrous elastic body interposed therebetween, and one end inserted into the stepped hole. consisting of a ring whose part is welded to the adherend and whose flange part provided at the other end is pressed into contact with the engaging part of the stepped hole; and a wear-resistant lid that fills the recessed part of the stepped hole. A wear-resistant plate bonded structure featuring: