JPS6238230Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an expansion joint, and in particular to an expansion joint that connects furnace wall units constituting a paint drying furnace or other heat treatment furnace with a certain clearance. Regarding improvements.

[Prior art and its problems]

Recently, attempts have been made to reduce furnace equipment costs by unitizing the walls of heat treatment furnaces. When assembling these furnace wall units to each other to form a furnace wall, adjacent furnace wall units should be assembled to prevent relative displacement from occurring due to stress caused by temperature changes. are elastically connected to each other.

FIG. 3 is a perspective view showing a furnace wall unit manufactured by the present applicant and a conventional expansion joint used for expansion and contraction joining of the furnace wall unit, where W ₁ and W ₂ are inner walls forming the furnace inner wall. A furnace wall unit consisting of a panel 1 and an outer wall panel 2 facing each other and integrally connected by a channel steel 3, J ₁ and J ₂ are furnace wall units.
This is an expansion joint that expands and contracts the inner wall panels 1 and 1 of W ₁ and W ₂ and the outer wall panels 2 and 2, respectively.

The expansion joints J ₁ and J ₂ include a joint plate 4 that covers the joint between the furnace wall units W ₁ and W 2, and a joint plate 4 that covers the joint between the furnace wall units W 1 and W ₂ , respectively.
panel insertion portions 5, 5 formed on both ends of the back surface of the panel, and the panel insertion portions 5, 5 include the joint plate 4, a corrugated leaf spring 6 fixed to the back surface of the joint plate 4, and It is formed of.

Therefore, when assembling the furnace wall, first fix one furnace wall unit W ₁ in a predetermined position, and then connect the expansion joints to the ends of the inner wall panel 1 and outer wall panel 2.
Insert the panel insertion part 5 of one of J ₁ and J ₂ ,
Connect one end of these expansion joints J ₁ and J ₂ to the furnace wall unit.
Hold W ₁ .

Next, the ends of the inner wall panel 1 and the outer wall panel 2 of the furnace wall unit _W2 are connected to the expansion joints _J1 and _J2, respectively.
simultaneously into the other panel insertion part 5 of the panel, and fix the furnace wall unit W ₂ in a state where the furnace wall units W ₁ and W ₂ are butted against each other with a certain clearance. Then, between the inner wall panel 1 and outer wall panel 2 of each furnace wall unit W ₁ and W ₂ , and the expansion joint J ₁ and
Insulating material such as glass wool (not shown) between J ₂ .
to form a heat insulating wall.

As a result, the joint between the furnace wall units W ₁ and W ₂ is covered with the expansion joints J ₁ and J ₂ to maintain the airtightness inside the furnace, and the inside of the furnace is heated to a high temperature to prevent the inner wall panels 1 and When the outer wall panel 2 thermally expands, the thermal expansion is absorbed by the expansion joints J ₁ and J ₂ and the furnace wall unit
Relative displacement of W ₁ and W ₂ is prevented.

However, in the conventional expansion joints _J1 and _J2 , since the panel insertion parts 5, 5 are formed on both ends of the back surface of the joint plate 4 as described above, the furnace wall unit
When assembling furnace wall unit W ₂ to W ₁ ,
First, the furnace wall unit W ₁ is fixed in a predetermined position, and the panel insertion portions 5 of one of the expansion joints J ₁ and J ₂ are inserted into the ends of the inner wall panel 1 and the outer wall panel ₂ , respectively. Connect one end of ₂ to furnace wall unit W ₁
and then these expansion joints
There is a problem in that the ends of the inner wall panel 1 and the outer wall panel 2 of the furnace wall unit W ₂ must be inserted into the other panel insertion portions 5 of J ₁ and J ₂ at the same time. That is, when joining the furnace wall unit W 2 to the furnace wall unit W ₁ , the heavy furnace wall unit W ₂ is connected so that the ends of the inner wall panel 1 and the outer wall panel 2 are connected to the furnace wall unit W _{1 .} After delicately adjusting the position of the two expansion joints J ₁ and J ₂ held at the ends of the panel so as to face each panel insertion part 5, insert the inner wall panel 1 and the outer wall panel 2 into each panel insertion part 5. 5 at the same time, which has the drawback of requiring a long time to assemble, resulting in poor work efficiency, as well as failure to insert, resulting in plastic deformation of the expansion joints J ₁ and J ₂ . There were some drawbacks as well.

In addition, since the expansion joints J ₁ and J ₂ have the panel insertion portions 5, 5 formed on both ends thereof, once the furnace wall panels W ₁ and W ₂ are assembled and joined, the It had the disadvantage that it could not be removed. That is, joint plate 4 of expansion joint J ₁
Since these are only in sliding contact with the inner wall panels 1 of the furnace wall units W ₁ and W ₂ that form the inner walls of the furnace, the expansion joints J ₁ and J filled with heat insulating material start from the contact area. Hot air from the furnace enters between _{the two} , and a large amount of resin contained in the hot air adheres to the insulation material over time, impairing the insulation effect and creating a fire hazard. In some cases, it is necessary to replace the soiled insulation, but since both expansion joints J ₁ and J ₂ cannot be removed, either the expansion joints J ₁ or J ₂ must be demolished, or the furnace wall unit must be replaced. Interior wall panel 1 of W ₁ or W ₂
Alternatively, there was a serious drawback that a part of the outer wall panel 2 had to be demolished.

[Purpose of invention]

Therefore, in this type of expansion joint, one furnace wall unit does not support the other furnace wall unit through the expansion joint, but the purpose of the present invention is to connect the furnace wall units that are fixed to each other. The expansion joints that join the outer wall panels of the furnace wall unit are not required to maintain airtightness as strictly as the expansion joints that join the inner wall panels. In view of this, we have especially attempted to improve the expansion joints used for expansion and contraction joints between external wall panels, and even after the furnace wall units have been assembled, they can be easily removed and removed for removal and installation. The purpose is to provide an expansion joint to eliminate the various drawbacks of the conventional technology.

[Structure of the idea]

In order to achieve this objective, the present invention aims at aligning the furnace wall units of a heat treatment furnace, which are constructed so as to fill a heat insulating material between the inner wall panel and the outer wall panel, against each other with a certain clearance and in a straight line. In an expansion joint that is connected in a continuous state, both ends are brought into sliding contact with the outer surfaces of the outer wall panels of two furnace wall units that are installed in a row, and are formed so as to cover the joint between the furnace wall units. A panel insertion portion into which an end of the outer wall panel of the one furnace wall unit is inserted is formed on one end side of the back surface of the joint plate.

[Effect of invention]

In the expansion joint according to the present invention, the panel insertion portion is formed only at one end of the back surface of the joint plate that rubs and contacts the outer surfaces of the outer wall panels of the two furnace wall units that are installed in series. After the wall units are butted together with a certain clearance and fixed in place, the joint plate is aligned approximately parallel to the outer wall panel, and the tip of the panel insertion portion formed at one end of the joint plate is inserted into one furnace wall. It can be inserted in the direction of the exterior wall panel of the unit while facing the end of the exterior wall panel.

Moreover, if the joint plate attached in this way is moved in parallel to the other furnace wall unit,
The panel insertion portion can be pulled out from the end of the outer wall panel to easily remove the expansion joint.

〔Example〕

Hereinafter, the present invention will be explained based on specific embodiments shown in the drawings.

FIG. 1 is a perspective view of the furnace wall of a heat treatment furnace assembled using the expansion joint according to the present invention, and FIG. 2 is a plan view thereof.

Note that the same reference numerals are given to the same parts as those explained in FIG. 3, and detailed explanation thereof will be omitted.

The expansion joint J according to the present invention includes a joint plate 4 that covers the joint of furnace wall units W ₁ and W ₂ that face each other and are spaced apart from each other with a certain clearance to allow thermal expansion; It consists of a panel insertion part 5 formed on one end side of the back surface of the plate 4, and the panel insertion part 5 is connected to the joint plate 4 and a corrugated leaf spring 7 fixed to the back surface of the joint plate 4. It is formed by twisting.

The joint plate 4 is formed of a rectangular metal plate such as a flexible aluminized steel plate with a thickness of about 1.2 mm, and its both ends are in close contact with the outer surfaces of the outer wall panels 2 of the furnace wall units W ₁ and W ₂ . They are designed so that they rub against each other.

The leaf spring 7 is fixed at one end along the longitudinal direction of the rear surface of the joint plate 4 by means such as welding or riveting, and at the same time, the other end is in contact with one end side of the rear surface of the joint plate 4. The tip portion of the panel insertion portion 5 that is biased and forms the insertion port 8 is bent in a direction opposite to the biasing direction.

The above is an example of the configuration of the expansion joint J according to the present invention, and its operation will be explained next.

When assembling the furnace wall units W ₁ and W ₂ , first fix one of the furnace wall units W ₁ in a predetermined mounting position, and attach one of the conventional expansion joints J ₁ to the end of the inner wall panel 1. The panel insertion part 5 is inserted to hold the expansion joint _J1 in the furnace wall unit _W1 . In this state, the other furnace wall unit W ₂ is positioned so as to butt against the furnace wall unit W ₁ so as to be in a straight line, and the inner wall panel 1 is inserted into the other panel insertion part 5 of the expansion joint J ₁ , It is fixed at a predetermined mounting position with a certain clearance between it and the furnace wall unit _W1 . Next, the expansion joint J according to the present invention is
The joint plate 4 is the outer wall panel 2 of the furnace wall unit _W1 .
At the same time, the insertion port 8 of the panel insertion part 5 should be parallel to the outer wall panel ₂ of the furnace wall unit W2.
Furnace wall unit W ₂
Move parallel to the direction. As a result, the outer wall panel 2 of the furnace wall unit W ₂ is inserted into the panel insertion part 5, and both ends of the back surface of the joint plate 4 are inserted into the furnace wall unit.
W ₁ and W ₂ are brought into close contact with the outer surfaces of the outer wall panels 2, so that the joint between the furnace wall units W ₁ and W ₂ is completely covered.

A heat insulating material (not shown) such as glass wool is placed between the inner wall panel 1 and outer wall panel 2 of each furnace wall unit W ₁ and W ₂ and in the gap E between the expansion joints J and J ₁ .
After filling the furnace wall, the assembly of the furnace wall is completed.

Furnace walls assembled in this way will prevent each furnace wall unit from thermally expanding when the inside of the furnace is heated to a high temperature and expands.
Since the inner wall panel 1 and the outer wall panel 2 of W ₁ and W ₂ follow the deformation in the free direction within the sliding plane with the expansion joints J ₁ and J, respectively, and the expansion is absorbed, the furnace wall units W ₁ , W Relative displacement or plastic deformation of _{the second} and other objects to be joined is prevented.

In addition, if the hot air in the furnace containing tar enters through the contact area between the expansion joint J ₁ and the inner wall panels 1, 1 and the insulation material becomes soiled, the joint plate 4 of the expansion joint J should be removed from the furnace wall unit. The expansion joint J can be easily removed by moving it in parallel in the _W1 direction and pulling out the panel insertion part 5 from the outer wall panel ₂ of the furnace wall unit W2, and the heat insulating material can be replaced. When the heat insulating material replacement work is completed, the expansion joint J can be reattached by the above-described operation.

As mentioned above, the expansion joint J is connected to the furnace wall unit.
Since it can be mounted even after W ₁ and W ₂ have been fixed at the predetermined mounting positions, expansion joints J 1 and J ₂ can be attached to the inner wall panel 1 and outer wall panel 2 of one furnace wall unit W ₁ , respectively, as in the conventional case _. (shown in Figure 3) are held at the same time, and the inner wall panel 1 and outer wall panel ₂ of the other furnace wall unit W2 are held against each panel insertion part 5.
This eliminates the trouble of having to insert the furnace wall units W ₁ and W 2 at the same time, and therefore the work of assembling the furnace wall units W 1 and W ₂ can be done in a short time without failure.

Moreover, since the expansion joint J can be easily inserted and removed even after installation, it can be removed and installed, and therefore the work of replacing the heat insulating material can be performed extremely easily.

[Effect of idea]

As described above, according to the present invention, the furnace wall units that form the furnace walls of a heat treatment furnace can be easily assembled and expanded/contracted in a short time, and at the same time, the heat insulating material filled inside can be removed. This has the excellent effect of making replacement work extremely easy.

[Brief explanation of drawings]

Figure 1 is a perspective view of the furnace wall of a heat treatment furnace assembled using an expansion joint according to the present invention, Figure 2 is a plan view thereof, and Figure 3 is a heat treatment furnace assembled using a conventional expansion joint. FIG. Explanation of symbols, W ₁ , W ₂ ... Furnace wall unit, 1...
...Inner wall panel, 2...Outer wall panel, 3...Channel steel, J...Expansion joint, 4...Joint plate, 5...Panel insertion portion, 7...Plate spring, 8...Insertion port.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Furnace wall units of a heat treatment furnace, which are constructed so that a heat insulating material is filled between an inner wall panel and an outer wall panel, are connected in a straight line by butting each other with a certain clearance. In an expansion joint that is joined in the installed state, both ends are in sliding contact with the outer surfaces of the outer wall panels of two furnace wall units that are installed in series, and are formed so as to cover the joint between the furnace wall units. On one end of the back side of the joint plate,
An expansion joint characterized in that a panel insertion portion is formed into which an end of the outer wall panel of the one furnace wall unit is inserted. (2) The expansion joint according to claim 1, wherein the joint plate is formed of a flexible rectangular metal plate. (3) The utility model in which the panel insertion portion is formed by the joint plate and a wave-shaped leaf spring fixed to the back surface of the joint plate and biased so as to come into contact with one end side of the joint plate. The expansion joint according to claim 1.