JPH0243115B2 - - Google Patents

Abstract

1. Infrared heated tunnel consisting of a tube frame (1) with rectangular cells closed by closing panels (3, 4, 5, 13), characterized in that said vertical panels (5) are separated into two groups, one interior (6) and on exterior (7) group, which are mounted from inside or outside of the tunnel respectively, every one of said groups consisting of rectangular panels of folded sheet metal with drooping edges, two parallel edges (8, 24, 27) of which being larger than the others and ending a V profile (9, 9a, 9b) permitting the respective panel to be fitted onto two parallel tubes (10 ; 12) of the rectangular cell, one of said panels (6, 6a ; 7, 7a) being fitted onto the vertical tubes (12) of said frame and the other of said panels (7, 7a ; 6, 6a) being fitted onto the tubes of the same cell perpendicular to them.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an industrial tunnel kiln, in particular to a tunnel kiln for drying or polymerizing various products and paints by heating them with infrared radiation.

Tunnel kilns that use infrared radiation are generally divided into two types. The first type is a tunnel kiln that uses an infrared lamp to irradiate infrared rays in a closed space, but this tunnel kiln mainly has a drawback of low durability. The second type is a tunnel kiln that emits infrared rays using an electric resistor installed in a cast iron radiant panel, but the radiant panel is heavy and difficult to assemble, and the construction cost is high.

The present invention eliminates the above-mentioned drawbacks of the conventional products, and provides a tunnel kiln that is lightweight, low-cost, highly durable, highly efficient, and exhibits low thermal stress.

The tunnel kiln according to the present invention has the following configuration.

1 A configuration in which a frame assembly is assembled with metal tubes in a rectangular lattice shape to form the outer shape of a tunnel kiln.

2. A configuration in which horizontal panels with a double wall configuration and a heat insulation function are provided for the frame assembly so as to form the top wall and bottom wall of the tunnel kiln.

3 The vertical panel is made up of two members, an inner and an outer part,
The inner rectangular member has four end flanges, two of the four parallel end flanges being wide and having a V-shaped portion adjacent thereto. Together with the V-shaped portion of the end flange, the outer rectangular member is provided so that it can be elastically adhered to the mutually parallel and horizontal tubes of the frame assembly, and the outer rectangular member can also be attached to the vertical tube of the frame assembly. A structure that is formed similarly to the inner member except that it is provided, and is provided so that heat insulation can be provided by the inner and outer panels.

4. A vertical radiant panel is formed almost in the same way as the above vertical panel, the outer panel that closes the outside of the panel is larger than the other panels, and the inner panel is provided with a through hole so that the radiant member can be attached. , a coated U-shaped heat resistor is attached to a radiant member that includes a steel plate stamped to have ribs for holding the heat resistor, and the heat resistor is welded to the steel plate. The radiating member is held by a backing plate that is attached to the inner panel via a tab, and a gap is left between the inner panel and the edge of the end flange of the steel plate;
The connecting end of the thermal resistor is bent perpendicular to the plane of the vertical inner panel, passes through the through hole in the inner panel, and passes through the thermal barrier layer to reach the electrical connection member, thereby making the electrical connection. The component is configured to be installed within the outer panel.

Other features of the present invention will become apparent from the detailed description below.

Further, the tunnel kiln according to the present invention will be explained in detail with reference to the drawings.

Construction of a tunnel kiln according to the present invention begins with the construction of a frame structure as shown in FIG. Although the frame structure is not a subject of the present invention, it is made of metal tube members that are assembled into a three-dimensional or rectangular parallelepiped shape using well-known connecting structures. In detail, as shown in the figure, the frame assembly 1 first starts with the assembly of horizontal stringers 2, and the horizontal stringers 2 are attached to a base placed on the ground where the tunnel kiln is to be installed. The proximal end of the vertical tube is fixed. In this case, the frame assembly 1 does not need to be installed upright on a base, but can also be configured to be suspended from various frame structural members.

Further, as shown in FIG. 4, panel members are attached to the lattice-shaped frame assembly 1 to form a tunnel configuration. In order to facilitate the mounting of the panel members, the lattices of the frame assembly 1 are formed into a rectangular shape corresponding to the dimensions of the panel members. There are three types of panel members, and the lattice spacing of the frame assembly 1 is also made into three types to match these. A top panel 3 and a bottom panel 4 are attached horizontally to close the lattices at the top and bottom of the frame assembly 1, respectively. As is clear from FIG. 1, the top panel 3 and the bottom panel 4 have different lengths in the width direction and different external shapes, but they both have a thickness that can achieve sufficient heat insulation. It has a double metal wall construction with a thickness and can be placed on the frame assembly 1 by its own weight. In this case, suitable fastening elements can also be used to connect the frame assembly 1 to the top and bottom panels 3, 4.

Vertical panels 5 are attached to the sides of the frame assembly 1.
The vertical panel 5 is made up of an inner panel 6 and an outer panel 7, both of which are made of steel plate, preferably thin stainless steel. The outer panel 7 is a rectangular panel having four end flanges extending inwardly of the frame assembly 1;
The inner horizontal end flange 8 of the end flanges is larger than the other end flanges. The end flange 8 has a V-shaped portion 9 at its tip, and the end flange 8 of the two outer panels 7
V-shaped portions 9 provided in the frame assembly 1 are opposed to each other and are provided so as to be able to accommodate a horizontal tube 10 of the frame assembly 1. With this configuration, the outer panel 7 has its horizontal tubes 10 on the outside of the frame assembly 1.
It can be attached to the metal by taking advantage of its flexibility. Furthermore, the outer panel 7 is previously fitted with a heat insulating layer 11 preferably made of rock wool pine. On the other hand, the inner panel 6 has an end flange similar to the outer panel 7, and an inner vertical end flange of the end flange has a V-shaped portion similar to the V-shaped portion 9 of the end flange 8. frame assembly 1.
A vertical tube 12 is removably provided and a heat insulating layer 11 is installed.

In addition, a radiant panel generally indicated by the reference numeral 13 in FIG. 1 is formed in substantially the same manner as the vertical panel 5, but the radiant panel 13 is further provided with a radiant member 14 inside. That is, the inner panel 6a of the radiant panel 13 is completely the same as the inner panel 6 except that it has a circular hole 15 through which the thermal resistor 16 is inserted and a rectangular through hole 17 through which a portion of the radiant member 14 is inserted. The radiant member 14 also includes a stamped steel plate 18, and the steel plate 18 is provided with an end flange 19, and a U-shaped heating portion of a coated thermal resistor 16 is provided. are fixed via suitable ribs. A backing plate made of a stainless steel plate and stamped in the same way as the steel plate 18 can be attached to cover the heat resistor 16, and in this case, the backing plate is spot welded to the inner panel 6a.

On the other hand, the connecting end 21 of the thermal resistor 16 is bent at right angles to the plane of the inner panel 6a so as to pass through the circular hole 15 of the inner panel 6a. Further, the end flange 19 of the steel plate 18 is provided with a fixing tab 22 whose free end is narrow with respect to the base, and the narrow free end of the fixing tab 22 is connected to the rectangular transparent part of the inner panel 6a. It is provided so as to be inserted into the hole 17. In this case, the wide base of the fixing tab 22 is connected to the edge of the end flange 19 and the inner panel 6.
It functions like a spacer and defines a sufficiently large gap between it and the inner surface of a. Therefore, air can flow through the gap, and the end flange 19 does not need to be formed flat with very high precision. The steel plate 18 can be attached to the inner panel 6a by simply bending the free end of the fixing tab 22.

The inner panels 6 and 6a are provided with a horizontal end flange 23 and a vertical end flange 24, and the vertical end flange 24 is connected to a V-shaped part similar to the above-mentioned V-shaped part 9. It is set up. In addition, rock wool mats 11a and 11b are held on the inner panel 6a, as shown in FIG. And thermal resistor 16
The connecting end 21 of the rock wool pine 11a,
11, and in particular extends towards the thermal barrier layer 11 as shown in FIG.

In addition, the inner panel 6a loaded with the preformed radiant member 14 is simply mounted on one of the vertical tubes 12 in the same way as the inner and outer panels 6 and 7 described above, and partially blocks the grid-like frame assembly 1. . When all of the inner panels 6a of the same shape are loaded, the electrical connections can be connected via connection strip devices 25, which are preferably adjustable in length. The connecting strip 25 is secured to the threaded end 26 of the connecting end 21 by means of a conventional nut arrangement.

Additionally, the outer panel 7a is formed substantially identically to the outer panel 7 described above and can be snap-fitted onto the tubular body of the frame assembly 1, except that the outer panel 7a has horizontal edges to define a space for accommodating electrical connections. The flange 27 is formed wide.

The tunnel kiln constructed as described above is relatively lightweight, can be assembled using standard tools, and has good workability when replacing parts. In addition, the construction cost of the tunnel kiln is extremely low, the weight of the radiant member is reduced, so thermal stress is extremely low, and the thermal resistor 16 operates at normal temperature, resulting in good thermal efficiency and improved durability. Achieve remarkable effects such as:

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the tunnel kiln according to the present invention, FIG. 2 is a partially exploded perspective view of the same, FIG. 3 is a partial perspective view of the same, and FIG. 4 is a perspective view of the same in an assembled state. DESCRIPTION OF SYMBOLS 1...Frame assembly, 2...Horizontal stringer, 3...Top panel, 4...Bottom panel, 5
... Vertical panel, 6 ... Inner panel, 7 ... Outer panel, 8 ... End flange, 9 ... V-shaped part, 11
...Heat shielding layer, 12...Vertical pipe, 13...Radiation panel, 14...Radiation member, 15...Circular hole, 1
6... Heat resistor, 17... Through hole, 18... Steel plate,
19... End flange, 21... Connection end, 22
... Fixing tab, 23, 24 ... End flange, 2
5...Connection strip, 26...Screw end, 27...
...end flange.

Claims (1)

[Claims] 1. In a tunnel kiln in which panels 3, 4, and 5 are attached to a frame assembly 1 in the form of a rectangular lattice, vertical panels 5 form the inner and outer sides of the tunnel kiln. It consists of two rectangular panels separated into an inner and outer part, and each of the two panels is made of a metal plate and has four end flanges 8 formed by bending this metal plate. Of the two end flanges 8, two end flanges parallel to each other are provided wider than the other two end flanges, and have a V-shaped portion 9 that can be attached to the tube body of the frame assembly 1. The V-shaped portion 9 of one of the inner and outer panels is attached to the vertical tube 12 of the frame assembly 1, and the other V-shaped portion 9 of the inner and outer panels is attached to the vertical tube 12. This tunnel kiln is characterized in that it is reinstalled into a horizontal tube 10 at right angles to the tunnel kiln. 2. A radiant member 14 including a steel plate 18 formed by stamping a metal plate is attached to one of the vertical panels 5,
A tab 22 whose free end is narrower than the base is provided on the end flange of the steel plate 18, and the steel plate 1
The tab 22 of the end flange of No. 8 is attached to the rectangular through hole of the inner panel so as to define a gap for air to flow between the inner panel and the end flange of the steel plate 18. A patent claim comprising a bent portion perpendicular to the surface of the inner panel through which the heat resistor 16 attached to the steel plate 18 is inserted through a hole in the inner panel so as to be connectable to an electrical connection member 21. The tunnel kiln according to item 1. 3. The tunnel kiln according to claim 1 or 2, wherein a heat insulating layer 11 made of rock wool pine is incorporated in each of the inner panel and the outer panel in advance. 4. A two-layer heat-blocking layer 11 made of rock wool pine is attached to one of the vertical panels 5 to which the radiation member 14 is attached, and a heat resistor 1 is attached to the two-layer heat-blocking layer 11.
4. The tunnel kiln according to claim 3, wherein the bent portion 6 is inserted through the tunnel kiln, and a third heat shielding layer 11 made of rock wool pine is provided on the outer panel.