CN201499336U

CN201499336U - Heating device of coreless electric heating radiant tube

Info

Publication number: CN201499336U
Application number: CN 200920232938
Authority: CN
Inventors: 张全根; 张海木
Original assignee: Suzhou Industrial Park Gusu Technology Co Ltd
Current assignee: Suzhou Industrial Park Gusu Technology Co Ltd
Priority date: 2009-07-17
Filing date: 2009-07-17
Publication date: 2010-06-02
Anticipated expiration: 2019-07-17

Abstract

The utility model relates to a heating device of a radiant tube for heating an industrial furnace, in particular to the heating device of the coreless electric heating radiant tube. The radiant tube is double-ended type; the wall thickness of the radiant tube at an extraction part of a furnace liner is larger than that at a hearth part; the heat of the extraction part is insulated with the padding made from heat-preserving fiber; two ends of the radiant tube are fixed by a flange and a furnace body, and are insulated by an insulation cushion; and a connecting terminal is connected with the flange. Therefore, the radiant tube is the coreless electric heating radiant tube, and heats the hearth by the direct heating of the shell of the radiant tube, thereby reducing the conduction links of heat, preventing from phenomena such as the burning loss and the short circuit of a heating body of a resistance wire, and even the breakdown of the radiant tube, reducing production cost, reducing maintenance cost in practical production, and also reducing the phenomena such as abnormal production sequence caused by frequent maintenance and the like.

Description

Coreless electric-heating radiant tube heating device

Technical field:

The utility model relates to a kind of radiant tube heater of industrial furnace heating usefulness, particularly a kind of coreless electric-heating radiant tube heating device.

Background technology:

Existing used for industrial furnace electric heating radiant tube; all be that the high-resistance electrothermic alloy silk is by porcelain dish insulation serial connection; use high-temperature heat-resistance steel pipe (being radiant tube) protection to combine again; the heat that resistance wire sends will be by the conduction of heat resisting steel radiant tube; radiation of burner hearth is heated; the outer burner hearth of resistance wire in the radiant tube and radiant tube must form a very big temperature difference like this; could radiate the resistance wire evolution of heat; temperature difference large radiation more is fast more; the big more resistance wire of the temperature difference is easy of more overheated scaling loss; even short circuit connects radiant tube and damages together; the radiant tube that electric heating element and heat resisting steel are made itself is exactly national rare material, costs an arm and a leg, and the main maintenance cost of industrial furnace is exactly an electrical heating elements; therefore the quality that directly influences industrial furnace useful life and the maintenance cost of electric heating element influence the ordinary production order.

Summary of the invention:

In order to solve resistance wire that prior art exists because of overheated scaling loss short circuit, connect radiant tube and damage together, cause the maintenance cost height, the production order is undesired, and production efficiency reduces.The utility model provides a kind of coreless electric-heating radiant tube heating device.

The technical solution adopted in the utility model is: a kind of coreless electric-heating radiant tube heating device, radiant tube is originally as double ended type, at the wall thickness of furnace lining extension wall thickness greater than the burner hearth part, heat insulation in the extension with the insulation fibre pad, the two ends of radiant tube are fixed by flange and body of heater, and are isolated by insulation cushion, and binding post connects with flange, described this radiant tube is a centreless electric heating radiant tube, is directly generated heat by the radiation shell burner hearth is heated.

The utility model has the advantages that: owing to adopted centreless electric heating radiant tube, saved the heating fuse that resistance wire is made, by the direct heating of radiation shell burner hearth is heated, reduced the conduction link of heat, there are not resistance wire heater scaling loss, short circuit, even puncture the phenomenon of radiant tube, reduced manufacturing cost, reduced the maintenance cost in the actual production, also reduced because phenomenon the such as often production order brought of maintenance is undesired.

Description of drawings:

Below in conjunction with the drawings and specific embodiments the utility model is further specified.

Fig. 1 is a U type coreless electric-heating radiant tube heating device schematic diagram.

Fig. 2 is that the A of Fig. 1 is to view.

Fig. 3 is a W type coreless electric-heating radiant tube heating device schematic diagram.

Fig. 4 is that the B of Fig. 3 is to view.

In the accompanying drawing: 1, radiant tube 2, insulation cushion 3, binding post 4, flange 5, insulation fibre

Embodiment:

As Fig. 1, shown in Figure 3,1 of radiant tube is as double ended type, can be the U type, also can be the W type, and described this radiant tube 1 is a centreless electric heating radiant tube, by the direct heating of radiation shell burner hearth is heated, at the wall thickness of furnace lining extension wall thickness greater than the burner hearth part, heat insulation with insulation fibre 5 pads in the extension, the two ends of radiant tube are fixed by flange 4 and body of heater, and by insulation cushion 2 isolation, binding post 3 connects with flange 4.

As Fig. 2, shown in Figure 4, this binding post 3 is connected with the low pressure incoming power.

Claims

1. coreless electric-heating radiant tube heating device, radiant tube (1) is originally as double ended type, at the wall thickness of furnace lining extension wall thickness greater than the burner hearth part, heat insulation in the extension with insulation fibre (5) pad, the two ends of radiant tube are fixed by flange (4) and body of heater, and are isolated by insulation cushion (2), and binding post (3) connects with flange (4), it is characterized in that: described radiant tube (1) is a centreless electric heating radiant tube, is directly generated heat by the radiation shell burner hearth is heated.

2. coreless electric-heating radiant tube heating device according to claim 1 is characterized in that: described radiant tube (1) is U type or W type.

3. coreless electric-heating radiant tube heating device according to claim 1 is characterized in that: described binding post (3) is connected with the low pressure incoming power.