JP2000130412A - Fixing structure of ceramic plate to metallic member and its fixing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To skillfully and efficiently arrange a plurality of ceramic plates on a metallic member, reduce a working time and labor required for attaching the ceramic plate, and reduce the total working time and cost required for manufacturing parts and forming a ceramic liner. SOLUTION: A long bar 2-1 having an inversed trapezoidal cross section is fixed on a metallic member 1, and also a plurality of ceramic plates 5, 7 equipped with dovetail tenons 6, 8 are prepared, the dovetail tenons 6, 8 of the ceramic plates 5, 7 are inserted in and engaged with a clearance formed by the bar 2-1 and the metallic member 1, and the dovetail tenons 6, 8 are held by a bar 2-2 prepared separately so that the plurality of ceramic plates 5, 7 is aligned along the longitudinal direction of the groove bars 2-1, 2-2. After that, the separately prepared bar member 2-2 is fixed on the metallic member 1, and next, at least the ceramic plate 7 positioned outermost out of the aligned ceramic plate 5, 7 groups is fixed on the bar 2-1. These processes are sequentially repeated, and the aligned ceramic plate 5, 7 groups are arranged in row.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure for mounting a plurality of ceramic plates on a metal member requiring abrasion resistance, corrosion resistance, heat resistance and the like, and a fixing method therefor.

[0002]

2. Description of the Related Art Conventionally, a fuel supply device for coal or coke in a boiler, various industrial hoppers, chutes,
Or in places where abrasion resistance, corrosion resistance, heat resistance, etc. are required especially on inner wall surfaces such as ducts for transporting slurry or powder, combustion parts and smoke exhaust parts of garbage incineration plants, or inner wall surfaces of concrete mixers Has been put to practical use a ceramic liner formed by aligning and fixing a plurality of ceramic plates satisfying these characteristics.

In order to form a ceramic liner, it is necessary to fix a plurality of ceramic plates to a metal member forming a mounting portion. The fixing method has been as follows. (1) After aligning and fixing metal plates with bolts on metal members such as chute wall surfaces, a ceramic plate is attached on the metal plate with a rubber adhesive to fix a plurality of ceramic plates. Method (see Japanese Utility Model Laid-Open No. 50-114075).

(2) A plurality of ceramic plates are arranged on a metal member via a heat-resistant heat insulating material layer such as asbestos, and each ceramic plate, the heat insulating material layer and the metal member are integrally fixed by bolting. (See Japanese Utility Model Publication No. 55-46743).

(3) A plurality of ceramic plates are arranged on a metal member, and a fastener is inserted into a tapered mounting hole formed in each of the ceramic plates, and the fastener is formed in the fastener. A method of inserting a welding rod into the formed hole, joining the fastener and the metal member by welding, and fixing a plurality of ceramic plates (Japanese Patent Publication No. Sho 4)
9-45775).

(4) A plurality of ceramic plates are arranged on a metal member, and a metal fixing pin having a projection is inserted into a tapered mounting hole formed in each ceramic plate. A method in which a plurality of ceramic plates are fixed by welding and joining the projections of the fixing pin to a metal member by supplying electricity to the fixing pin (see Japanese Patent Publication No. 7-112629).

(5) A dovetail groove is engraved at intervals on a metal member, a dovetail is provided on a plurality of ceramic plates, and a dovetail of each ceramic plate is sequentially fitted into the dovetail of the metal member. And fixing a plurality of ceramic plates (see JP-A-2-188696).

[0008]

However, the fixing method
In the method of attaching a ceramic plate to a metal plate with a rubber adhesive as in (1), the use environment is limited and there is a problem in reliability. That is, the ceramic plate is 200
The rubber adhesive softens in an environment where it is heated to more than ℃, and the ceramic plate is exposed to water vapor, and in a humid environment, the rubber adhesive absorbs moisture, resulting in either case. However, there is a problem that a significant decrease in adhesive strength cannot be avoided, and the ceramic plate falls off.

Further, when mounting the ceramic plate, it is necessary to first form a through hole for bolting a plurality of metal plates in the metal member, and when the ceramic plate is bonded, the temperature is lower than 5 ° C. In such a case, the rubbery adhesive is hardly stretched to cause uneven bonding. Therefore, it is necessary to heat the structure with a heating lamp or the like in order to eliminate the uneven bonding.

In the method of fixing the ceramic plate by bolting as in the fixing method (2), a through hole is formed at a position corresponding to the mounting position of each ceramic plate of the metal member, and individual members are formed. Since it was necessary to bolt each ceramic plate, the work was very troublesome, and the production efficiency was poor with a large hopper. For this reason, there was a risk of a significant delay in the construction period and a resulting increase in cost.

In addition, since there are dimensional tolerances in the devices and equipment to which the ceramic plate is mounted or in the ceramic plate, the mounting position of the ceramic plate on the metal member forming the device or equipment is determined in advance, and an accurate position for bolting is determined. It was very difficult to form a through hole. Especially when the device or equipment to which the ceramic plate is mounted has a complicated shape, the ceramic plate often cannot fit in the mounting bolt position in many cases, and the ceramic plate must be processed during the mounting work. There was an inconvenience that it had to be done.

Furthermore, as in the fixing methods (3) and (4), the fasteners and the fixing pins are inserted into the mounting holes of the ceramic plate, and the fasteners and the fixing pins are fixed by welding or welding. Since there is no need to process the metal member side as in methods (1) and (2), workability can be improved, but it is necessary to fix each ceramic plate by welding or welding,
For example, from having to 2500 per 1 m ² is also a ceramic plate welded or welding, a process for their fixed
(3) In (4), the work time and labor did not improve significantly.

In addition, in the fixing method (3), it takes time to build up the surface of the metal member, it is difficult to check whether the welding is performed well, and furthermore, it is difficult to confirm the arc or the welding time. There was also a problem that the ceramic plate was broken by the heat of the flux.

Further, in the method of providing a dovetail groove in a metal member and fixing the dovetail of a ceramic plate in the dovetail groove as in the fixing method (4), it is necessary to process the dovetail groove in the metal member. When the metal member is made of a thin metal plate such as a hopper or a chute, the fixing method (4) cannot be adopted. Moreover, in order to fit the dovetail of the ceramic plate into the dovetail groove of the metal member, it is necessary to strictly control the fitting tolerance, and there has been a problem that the cost is increased.

[0015]

In view of the above-mentioned problems, a fixing structure of a ceramic plate to a metal member according to the present invention has a plurality of ceramic plates having a dovetail and an inverted trapezoidal cross section. And a plurality of long strips, and these strips are fixed on the metal member at intervals, and the termite of the ceramic plate is engaged in the space between the strips. A plurality of ceramic plates are aligned along the longitudinal direction of the strip to form a ceramic plate group, and at least the outermost ceramic plate is fixed. Further, in the present invention, the ceramic plate is fixed to the metal member by the following steps (A) to (E).

(A) A step of fixing a long strip having an inverted trapezoidal cross section on a metal member. (B) A plurality of ceramic plates provided with a dovetail are prepared.
The dovetail of each ceramic plate is inserted into and engaged with a gap formed by the strip and the metal member, and the dovetail is prepared by using a separately prepared long strip having an inverted trapezoidal cross section. A step of aligning a plurality of ceramic plates along the longitudinal direction of the strip by sandwiching the same; (C) a step of fixing the separately prepared strip on a metal member; and (D) a step of extending the longitudinal direction of the strip. Fixing at least the outermost ceramic plate out of the aligned ceramic plate group (E) repeating the steps (B) to (D) to sequentially arrange the aligned ceramic plate groups

[0017]

Embodiments of the present invention will be described below.

FIGS. 1 to 8 are diagrams for explaining a method of fixing a ceramic plate to a metal member according to the present invention step by step.
First, as shown in FIG. 1, a strip 2-1 made of a metal such as stainless steel or cast iron having a long shape and an inverted trapezoidal cross section.
Is fixed to a predetermined position of the metal member 1 forming the mounting portion.
To fix the strip 2-1, as shown in FIG.
1, a threaded pin 9 is welded and planted on the metal member 1 exposed in the stepped mounting hole 2-1a pre-drilled in the step 1, and a nut is attached to the threaded portion 9a of the pin 9 as shown in FIG. 10 is screwed. At this time, the mounting hole 2-
In some cases, a gap may be formed between the nut 1a and the nut 10. In such a case, a filler may be embedded. For example, an inorganic adhesive may be used at a high temperature, and an organic adhesive may be used at a low temperature. An adhesive may be used.

The number of mounting holes 2-1a formed in one strip 2-1 is selected according to the size of the ceramic plate 5 to be fixed thereafter or the length and width of the strip 2-1. For example, when the length of the strip 2-1 is 1 m, three mounting holes 2-1a are arranged at equal intervals.
Is provided, sufficient bonding strength can be obtained. When welding the pin 9, as shown in FIG. 9, a large current is instantaneously applied between the welding gun 20 and the metal member 1 while the pin 9 is pressed against the metal member 1. ,
The tip of the pin 9 having a large electric resistance value generates heat and becomes high temperature, melting the surface of the metal member 1 with which the pin 9 contacts, and melting the tip itself of the pin 9 as shown in FIG. 1 can be welded.
However, the material of the pin 9 may be mild steel, nickel alloy, stainless steel, aluminum or its alloy, magnesium and its alloy, titanium and its alloy, which are suitable for heat generation and welding with energization.

Next, as a ceramic plate constituting a ceramic liner, as shown in FIG. 10A, a dovetail which substantially matches a gap formed between the tapered surface of the strip member 2-1 and the metal member 1. A plurality of ceramic plates 5 having the same 6
Then, as shown in FIG. 10B, a plurality of ceramic plates 7 having the same shape as that of FIG. 10A and having stepped mounting holes 7a in the plate portion are prepared. Ceramic plate 5,
As a material constituting 7, ceramics mainly composed of alumina, zirconia, silicon carbide, silicon nitride or the like, or TiC-based, TiN-based, and TiN-TiC-based cermets can be used. A suitable ceramic material may be appropriately selected from the materials described above according to the conditions required for corrosion resistance, heat insulation, and the like. The size of the ceramic plates 5 and 7 may be appropriately determined according to the mounting location and the manufacturability. For example, the plate-like ceramic plates 5 and 7 shown in FIG. Should be used.

Then, as shown in FIG. 4, the dovetails 6, 8 of the plurality of ceramic plates 5, 7 are inserted into gaps formed by the strips 2-1 and the metal member 1, respectively. A plurality of ceramic plates 5 are engaged with each other by holding the dovetails 6, 8 of the ceramic plates 5, 7 with a long strip 2-2 having an inverted trapezoidal cross section prepared separately. , 7 are aligned along the longitudinal direction of the strip 2.

In order to align the ceramic plates 5 and 7, the ceramic plate 7 having the mounting holes 7a may be arranged at least at the outermost position in the aligned ceramic plate group.

Next, in the strip 2-2, the strip 2-1 is also used.
Is fixed on the metal member 1 under the same conditions as described above.

Thereafter, the strip member 2-exposed in the mounting hole 7a of the ceramic plate 7 located at the outermost position of the ceramic plate group.
As shown in FIG. 5, a threaded pin 9 is welded and planted on the top 1, and a nut 10 is screwed into a screw portion 9 a of the pin 9 as shown in FIG. By fixing the plate 7 to the strip 2-1, the plurality of ceramic plates 5 and 7 can be securely fixed to the metal member 1.

Thereafter, as shown in FIG. 7, by repeating these steps, a group of ceramic plates aligned to cover a predetermined area is arranged.

In FIG. 7, a portion where the strip 2-4 is exposed has a dovetail 4 as shown in FIG. 10 (c) and a stepped mounting hole 3a in a plate-like portion. As shown in FIG. 8, a ceramic plate 3 having an L-shaped cross section is engaged with a dovetail 4 of the ceramic plate 3 in a gap formed by the tapered surface of the strip 2-4 and the metal member 1. After a plurality of ceramic plates 3 are aligned along the longitudinal direction of the strip 2-4, the mounting holes 3a of each ceramic plate 3 are formed.
After the threaded pin 9 is welded and planted on the exposed strip 2-4 as in FIG. 5, the nut 10 is screwed into the threaded portion 9a of the pin 9 as in FIG. The outer ceramic plate 3 may be fixed to the strip 2-4. A gap may be formed between the mounting holes 3a and 7a of the ceramic plates 3 and 7 and the nut 10;
Fillers may be embedded in the same manner as in fixing -1, 2-2, 2-3 and 2-4.

Thus, there are provided a plurality of ceramic plates 5 and 7 having the termites 6 and 8 and a plurality of elongated strips 2-1 to 2-4 having an inverted trapezoidal cross section. These strips 2-1 to 2-4 are fixed on the metal member 1 at intervals, and the termites of the ceramic plates 5 and 7 are inserted into the spaces between the strips 2-1 to 2-4. The ceramic plates 5 and 7 are engaged to align the plurality of ceramic plates 5 and 7 along the longitudinal direction of the strips 2-1 to 2-4 to form a ceramic plate group, which is at least positioned at the outermost position. The ceramic plate 7 is formed as a strip 2-1.
A structure for fixing the ceramic plate fixed to 2-4 to the metal member can be obtained.

As described above, according to the present invention, each of the ceramic plates 5 and 7 is provided with the dovetails 6 and 8, and the dovetails 6 and 8 are formed in a long shape having an inverted trapezoidal cross section. Strip 2-
Since the ceramic plates 5 and 7 are aligned by being sandwiched by 1-2-4, the positioning and alignment of the ceramic plates 5 and 7 are easy, and the ceramic plates 5 and 7 can be arranged efficiently and efficiently. it can.

Further, the strip members 2-1 to 2-4 are connected to the metal member 1
And at least the outermost ceramic plates 3 and 7 need only be fixed to each of the strips 2-1 to 2-4. It is not necessary to fix all the ceramic plates by welding or welding.

Furthermore, the strip members 2-1 to 2-4 are connected to the metal member 1
In fixing the ceramic plates 3 and 7 to the strips 2-1 to 2-4, the number of welding of the threaded pins 9 and the number of the nuts 10 can be extremely reduced. The total work time and cost required to construct the ceramic liner, such as the work time and labor required to install the ceramic liner and the time required to manufacture the parts, can be significantly reduced. In the present embodiment, the strip 2-
As means for fixing the ceramic plates 1 to 2-4 to the metal member 1 and the ceramic plates 3 and 7 to the strips 2-1 to 2-4, respectively, after welding the threaded pin 9 to the threaded portion 9a of the pin 9, The means for screwing and fixing the nut 10 has been described.
2-4 and fixing pins conforming to the shapes of the mounting holes 2-1a to 2-4a, 3a and 7a formed in the ceramic plates 3 and 7, respectively, and the fixing pins are fixed to each other by welding. You can also.

Further, in the present embodiment, an example has been described in which a plurality of ceramic plates are aligned and fixed on the surface where the mounting portion is formed of a flat metal member. However, the present invention is not limited to this, and FIGS. As shown in (c), the fixing structure and the fixing method of the present invention can be applied to any shape of mounting portion such as a cylindrical, U-shaped, or U-shaped mounting portion. it can.

[0032]

(Embodiment 1) Here, a ceramic plate is mounted on a metal member by using the fixing method of the present invention shown in FIGS. 1 to 8 and the fixing methods (4) and (5) as a conventional example. An experiment was conducted to determine the total working time required to fix the horn.

In the present experiment, a flat plate having a size of 1 mm × 1 m and a thickness of 25 mm was used as a metal member forming a mounting portion, and a ceramic plate having a size of 40 mm × 40 mm was fixed on the flat plate. In the fixing method of the present invention, 25 strips were used.

Table 1 shows the results.

[0035]

[Table 1]

As a result, the fixing method of the present invention does not require the dovetail machining of the metal member, and the number of pins used for fixing is extremely small. It can be significantly shortened compared to method (4), and even when fixing the ceramic plate, it can be installed in about 1/3 the time of the conventional fixing method (3) (4). Was. When the fixing method of the present invention is used in the entire working time, the fixing can be performed in an extremely short time as compared with the conventional fixing methods (3) and (4).

(Embodiment 2) Next, using the fixing method of the present invention shown in FIGS. 1 to 8 and the conventional fixing method (5), the outer surface of a cylindrical body having a rectangular cross section was formed on the outer surface. An experiment was conducted to determine the total working time required to secure the board. In this experiment, the dimensions of the cylindrical body were 150 mm × 167 mm × 1005 mm, and the ceramic liner was formed on a metal member of 167 mm × 1005 mm.

Table 2 shows the results obtained by the fixing method of the present invention, and Table 3 shows the results obtained by the conventional fixing method (5).

[0039]

[Table 2]

[0040]

[Table 3]

As a result, the total working time by the fixing method of the present invention was 38 hours, which was about 1 hour as compared with the conventional fixing method (4).
/ 7.

[0042]

As described above, according to the present invention, a step (A) of fixing a long strip having an inverted trapezoidal cross section on a metal member is provided. Prepare a number of ceramic plates, insert the dovetail of each ceramic plate into the gap formed by the strip material and the metal member and engage with it, and separately prepare a long shape whose cross-sectional shape is inverted trapezoidal (B) aligning a plurality of ceramic plates along the longitudinal direction of the strip by sandwiching the termites with the strip.
Fixing the separately prepared strip material on a metal member (C), fixing at least the outermost ceramic plate of the aligned ceramic plate group (D),
The steps (B) to (D) are repeated, and the ceramic plates are fixed to the metal member by the step (E) of sequentially arranging the aligned ceramic plates. Thus, the positioning and alignment of each ceramic plate can be achieved. It is easy and efficient and can be arranged efficiently and efficiently. In addition to fixing each strip to the metal member, it is only necessary to fix at least the outermost ceramic plate to each of the members. (3) It is not necessary to fix all the ceramic plates by welding or welding as in (4), and the number of parts such as threaded pins and nuts used for fixing can be extremely reduced, and the ceramic plates can be used. The work time and labor required for installation, as well as the total work time and cost required to construct the ceramic liner, such as the production of parts, can be significantly reduced. Kill.

The following effects can be obtained by using the structure for fixing the ceramic plate to the metal member by the fixing method of the present invention.

(1) The work of attaching the ceramic plate forming the liner is not restricted by the working environment, without being affected by the temperature and humidity, the presence or absence of dust, and the like.

(2) It is not necessary to form a dovetail groove in the metal member forming the mounting portion, and it is not necessary to care much about the tolerance of fitting into the dovetail groove, so that the processing cost can be reduced.

(3) Regardless of the skill level of the worker,
The work of mounting a ceramic plate having uniform and excellent bonding strength can be performed easily and in a very short time.

(4) Even if the metal member forming the mounting portion is large in dimension, thin, or has a complicated shape, the ceramic plate can be mounted. Conventionally, it is difficult to fix the ceramic plate. It can be efficiently fixed to the lining of large-diameter pipes, channel pipes, large curved surfaces, etc.

[Brief description of the drawings]

FIG. 1 is a view for explaining a fixing method according to the present invention, and is a perspective view showing a state in which a strip is installed on a metal member.

FIG. 2 is a view for explaining a fixing method according to the present invention, and is a cross-sectional view showing a state in which a threaded pin is erected in a mounting hole of a strip installed on a metal member.

FIG. 3 is a view for explaining a fixing method according to the present invention, and shows a state in which a nut is screwed into a thread portion of a pin planted in a mounting hole of the strip to fix the strip to a metal member. FIG.

FIG. 4 is a view for explaining a fixing method according to the present invention, and is a perspective view showing a state in which ceramic plates are aligned on a metal member.

FIG. 5 is a view for explaining a fixing method according to the present invention, and is a cross-sectional view showing a state where a threaded pin is erected in a mounting hole of a ceramic plate installed on a strip.

FIG. 6 is a view for explaining a fixing method according to the present invention, in which a nut is screwed into a screw portion of a pin planted in a mounting hole of the ceramic plate to fix the ceramic plate on a metal member. FIG.

FIG. 7 is a view for explaining a fixing method according to the present invention, and is a perspective view showing a state where a group of ceramic plates arranged in a row on a metal member is arranged.

FIG. 8 is a perspective view showing a fixing structure according to the present invention.

FIG. 9 is a view showing a state in which a threaded pin is fixed by a welding gun.

FIGS. 10A to 10C are perspective views showing a ceramic plate used for the fixing structure of the present invention.

FIGS. 11A to 11C are views showing various forms of the fixing structure of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Metal member 2-1 to 2-4 ... Strip material 2-1a to 2-4a ... Mounting hole of strip material 3, 5, 7 ... Ceramic plate 3a, 7a ... Ceramic Plate mounting holes, 4, 6, 8 ... ceramic plate dovetail 9 ... threaded pin 10 ... nut

Claims (2)

[Claims] 1. A plurality of ceramic plates having a termite;
A plurality of elongate strips having a cross-sectional inverted trapezoidal shape, the strips being fixed on a metal member at intervals, and a dovetail of the ceramic plate being inserted into a space between the strips. A plurality of ceramic plates are aligned along the longitudinal direction of the strip by engaging the ridges to form a ceramic plate group, and at least the outermost ceramic plate is fixed to a metal member of the ceramic plate fixed thereto. Fixed structure. 2. A method for fixing a ceramic plate to a metal member, comprising the following steps (A) to (E). (A) A step of fixing a long strip having a reverse trapezoidal cross section on a metal member. (B) A plurality of ceramic plates provided with a dovetail are prepared.
The dovetail of each ceramic plate is inserted into and engaged with a gap formed by the strip and the metal member, and the dovetail is prepared by using a separately prepared long strip having an inverted trapezoidal cross section. A step of aligning a plurality of ceramic plates along the longitudinal direction of the strip by sandwiching the same; (C) a step of fixing the separately prepared strip on a metal member; and (D) a step of extending the longitudinal direction of the strip. Fixing at least the outermost ceramic plate out of the aligned ceramic plate group (E) a step of sequentially arranging the aligned ceramic plate group by repeating the steps (B) to (D)