JP3682090B2 - Radiant heater - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a radiant heater in which a heater is disposed in a protect tube.
[0002]
[Prior art]
A known basic configuration of the radiant heater is illustrated in FIG. The radiant heater 1 includes a stainless steel bottomed protection tube 2, a stainless steel cover 3 that closes the opening of the protection tube 2, and a disc-shaped refractory material that is spaced apart from the protection tube 2. 4, a refractory spacer 5 disposed between the supporters 4, and a heater 6 disposed so as to penetrate the periphery of the supporter 4. 7 shows a heat-resistant and fire-proof filling. The spacer 5 and the supporter 4 are supported by a stainless steel pipe 8 penetrating through the central portion thereof.
[0003]
The heater 6 is supported around the supporter 4 in such a manner that it continuously folds at the leftmost supporter 4 and the second supporter 4 from the right side in FIG.
In use, the heater 6 is connected to a power source, and the heater 6 is energized to dissipate heat through the protect tube 2.
[0004]
[Problems to be solved by the invention]
However, the radiant heater as shown in FIG. 3 is deformed and damaged during use due to the difference in thermal expansion between the tube and the supporter, and due to the load on the supporter due to the thermal expansion of the heater. Thus, since the heater breaks and heat radiation is impossible, the present invention makes it a problem to be solved to eliminate such a disconnection accident.
[0005]
[Means for Solving the Problems]
In the present invention, although the cause of the disconnection of the heater is unknown, the supporter of the radiant heater in which the disconnection of the heater is observed pays attention to the fact that a crack is commonly seen, and an improvement to the supporter is added. . However, since the disconnection of the heater could not be resolved, the next attempt was made to keep the supporter's posture constant, and as a result, the heater disconnection accident was successfully eliminated. As the best means for maintaining the supporter in a fixed posture, the present invention employs means for providing a flange portion on the spacer and increasing the contact surface between the spacer and the supporter.
[0006]
Furthermore, in the present invention, instead of the folded portion of the heater, the heater wires arranged in parallel are electrically coupled via a connecting member, and this connecting member is inserted into the deepest supporter hole in the protection tube. Adopt means to insert.
[0007]
Specifically, the present invention is provided with a bottomed protection tube, a cover for closing the opening of the protection tube, a disk-like supporter arranged separately in the protection tube, and each supporter. A radiant heater tube having a spacer and a heater that passes through the periphery of the supporter and is arranged in parallel to each other, the flange having flange portions that are radially expanded at both ends, and the flange portions are side surfaces of the supporter A radiant heater is provided that is in contact with a refractory cushion washer.
[0008]
[Action]
The combination of the supporter and the spacer according to the present invention can maintain a constant shape even when the temperature is high, while the supporter maintains the initial posture. This enables relative deformation due to the difference in thermal expansion coefficient between the protect tube and the heater, and the supporter does not apply an unnecessary load to the heater and is effective in eliminating the heater disconnection.
[0009]
【Example】
Since the basic configuration of the radiant heater according to the present invention is substantially the same as that shown in FIG. 3, the description thereof will be omitted, and only the improvements will be described with reference to FIGS. 1 and FIG. 2 that are the same as those shown in FIG. The refractory spacer 51 has flange portions 52 that are radially outwardly extended at both ends thereof, and the flange portions 52 abut against the side surfaces of the refractory supporter 4 via ceramic paper 53 as washers. Let This prevents the heater 6 from leaning against the tilt of the supporter 4 and eliminates the disconnection of the heater 6. The outer diameter of the flange portion 52 may be at least half the diameter of the supporter 4.
[0010]
One end of the heater 6 is connected via a connecting member 61 of a conductive material instead of being folded. The other end of the heater 6 arranged in parallel may be folded as before, or may be coupled as shown in FIG. The connecting body 61 is inserted into the hole 42 of the supporter 41 arranged at the innermost side of the protect tube 2 so that the heater 6 can be freely expanded and contracted. This allows the heater 6 to freely expand and contract due to the temperature change of the heater 6, and the expansion and contraction of the heater 6 tilts the supporter 4 so that a great load is not applied to the heater 6.
[0011]
【effect】
The spacer used in the present invention prevents the supporter from falling or tilting, and eliminates disconnection of the heater. In addition, the use of the connecting body allows the heaters to freely expand and contract regardless of the expansion and contraction of the protect tube, keeps the heaters at a constant size, and prevents the heater from dragging the supporter.
[Brief description of the drawings]
FIG. 1 is a front view of a separator used in a radiant heater according to the present invention.
FIG. 2 is a front view showing a heater and a connecting body used in an example of the radiant heater of the present invention.
FIG. 3 is a cross-sectional view showing a conventional example of a radiant heater.
[Explanation of symbols]
2 Protect tube 3 Cover 4 Supporter 42 Hole 51 Spacer 52 Flange 53 Ceramic paper 61 as washer Connection body 8 Pipe

Claims (3)

A bottomed protection tube, a cover that closes the opening of the protection tube, a disk-like supporter that is spaced apart in the protection tube, a spacer that is placed between the supporters, and a supporter that penetrates the periphery of the supporter In addition, in the radiant heater tube having the heaters arranged in parallel to each other, both ends of the spacer have flange portions that are expanded radially outward, and the flange portions are disposed on the side surfaces of the supporter through cushion cushion washers of refractory material. A radiant heater characterized by contacting. The radiant heater according to claim 1, wherein one end of the heaters arranged in parallel to each other is electrically coupled through a connecting body, and the end of the connecting body is inserted into a hole of the supporter. The radiant heater according to claim 2, wherein a fixed pipe or a bar is passed through the central part of the supporter and the spacer, and the washer is formed of ceramic paper.

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