High energy efficiency and long life heating furnace radiant tube

Abstract

The invention discloses a high-energy-efficiency and high-life heating furnace radiation tube, comprising an outer shell, wherein a tail support ring, a support ring, a pressing plate, a heat insulating layer and a fiber module are sequentially arranged inside the outer shell from the inside to the outside, the outer side of the fiber module is contacted and connected with a support plate, the support plate is outside the outer shell, and the outer shell and the support plate are not in contact, the support plate, the fiber module, the heat insulating layer, the pressing plate, the support ring and the middle part of the tail support ring are sequentially fastened and connected by a penetrating suspension rod, the tail support ring and the support ring are provided with heating wires, the support plate, the fiber module and the heat insulating layer are provided with lead-out rods, the heating wires penetrate the pressing plate and are electrically connected with the lead-out rods, in the invention, the heat isolation conduction distance is adopted between the outer shell port and the top of the support plate, and the fiber module is adopted in the middle to realize the connection transition, thereby improving the thermal efficiency of the heating furnace radiation tube; a surplus support ring is arranged at the bottom of the tail support ring, thereby avoiding the short circuit phenomenon of the heating wire in the original technology, and effectively improving the service life of the product.

Description

Technical Field

[0001] The invention relates to the technical field of heating tubes, in particular to the field of heating furnace radiation tubes. Background Art

[0002] At present, in industrial heating furnaces, heating furnace radiation tubes are core components related to heating effects. Existing heating furnace radiation tubes are installed in a way that the outer shell covers the support plate. This type of heating furnace radiation tube is prone to the outer shell taking away a large amount of heat and losing it from the support plate. The thermal efficiency of the product is low, resulting in low overall thermal efficiency of the heating furnace. Generally, a heating furnace, especially a large industrial heating furnace, will be installed with a large number of single heating furnace radiation tubes. From the perspective of the entire heating furnace, the environmental protection and economy are not high, the furnace temperature control is difficult, the heating temperature rises slowly, and the precision regulation is difficult.

[0003] Furthermore, the current heating furnace radiation tubes all use a tail support ring as the tail support of the heating furnace radiation tube. There is a part of the tail end of the heating wire suspended outside the tail support ring. When the heating wire is heated, the high temperature will cause the heating wire to expand and elongate greatly. The elongation of the heating wire in large heating furnace radiation tubes is usually more than 5-6cm. The expanded and elongated heating wire will gather outside the tail support ring, which is easy to cause a short circuit between the heating wires under the action of gravity. Therefore, it is necessary to improve the product to extend the life of the heating furnace radiation tube. Summary of the invention

[0004] The object of the present invention is to provide a heating furnace radiant tube with high energy efficiency and long service life.

[0005] The technical solution for achieving the purpose of the present invention is: a high-energy-efficiency and high-life heating furnace radiation tube, comprising an outer shell, wherein the interior of the outer shell is provided with a tail support ring, a support ring, a pressure plate, a thermal insulation layer and a fiber module in sequence from the inside to the outside, the outer side of the fiber module is contacted and connected with a support plate, the support plate is outside the outer shell, and the outer shell and the support plate are not in contact, the support plate, the fiber module, the thermal insulation layer, the pressure plate, the support ring and the middle part of the tail support ring are fastened and connected in sequence by a penetrating suspension rod, the tail support ring and the support ring are provided with heating wires, the support plate, the fiber module and the thermal insulation layer are provided with lead-out rods, the heating wires penetrate the pressure plate and are electrically connected to the lead-out rods.

[0006] Preferably, the distance between the outer shell and the top of the support plate is not less than 100 mm.

[0007] Preferably, a surplus support ring is further provided in the shell, the surplus support ring is in contact with and connected to the bottom of the tail support ring, and the surplus support ring is provided with surplus holes at positions corresponding to the heating wires, and the surplus holes are used to support the elongation of the heating wires during thermal expansion.

[0008] Preferably, the support plate, the fiber module, the heat insulation layer, the pressure plate, the support ring, the tail support ring and the middle part of the surplus support ring are fastened and connected in sequence by a penetrating suspension rod.

[0009] Compared with the prior art, the present invention has the following significant advantages: a heat-isolating conduction distance is adopted between the port of the shell and the top of the support plate, and a fiber module is adopted in the middle to realize the connection transition; in the actual installation of the radiant tube of the heating furnace, the shell is placed inside the heating furnace; due to the presence of the heat insulation layer and the fiber module, the heat emitted by the shell is prevented from being conducted toward the support plate, thereby realizing the improvement of the thermal efficiency of the radiant tube of the heating furnace, and then producing economy and environmental protection for the entire heating furnace, especially reducing the difficulty of precise control of temperature rise; a surplus support ring is arranged at the bottom of the tail support ring, which can play a good supporting role when the heating wire expands; the heating wire expands and contracts back and forth in the surplus hole with thermal expansion and contraction, thereby avoiding the short circuit phenomenon of the heating wire in the original technology, and can effectively improve the service life of the product.

[0010] The present invention is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the heating furnace radiation tube with high energy efficiency and long service life of the present invention.

[0012] Figure 2 for Figure 1 Enlarged view of the middle J section. DETAILED DESCRIPTION

[0013] like Figure 1 and Figure 2 As shown, a high-energy-efficiency and high-life heating furnace radiation tube comprises an outer shell 12, wherein the inside of the outer shell 12 is provided with a tail support ring 13, a support ring 8, a pressing plate 7, a heat insulating layer 5 and a fiber module 2 in sequence from the inside to the outside, the outer side of the fiber module 2 is contacted with a support plate 1, the support plate 1 is outside the outer shell 12, and the outer shell 12 and the support plate 1 are not in contact, the support plate 1, the fiber module 2, the heat insulating layer 5, the pressing plate 7, the support ring 8 and the middle part of the tail support ring 13 are fastened and connected in sequence through a penetrating suspension rod 11, the tail support ring 13 and the support ring 8 are provided with a heating wire 9, the support plate 1, the fiber module 2 and the heat insulating layer 5 are provided with a lead-out rod 3, the heating wire 9 penetrates the pressing plate 7 and is electrically connected to the lead-out rod 3, and the distance between the outer shell 12 and the top of the support plate 1 is 280 mm.

[0014] A surplus support ring 14 is also provided in the outer shell 12, and the surplus support ring 14 is in contact with the bottom of the tail support ring 13. The surplus support ring 14 is provided with a surplus hole 15 at the corresponding position of the heating wire 9, and the surplus hole 15 is used to support the elongation of the heating wire 9 during thermal expansion. The support plate 1, the fiber module 2, the insulation layer 5, the pressing plate 7, the support ring 8, the tail support ring 13 and the middle part of the surplus support ring 14 are sequentially fastened and connected by the penetrating suspension rod 11.

[0015] In the present invention, the distance between the port of the shell 12 and the top of the support plate 1 is 280 mm, and the fiber module 2 is used in the middle to achieve the connection transition. In the actual installation of the heating furnace radiation tube, the shell 12 is placed inside the heating furnace. Due to the presence of the insulation layer 5 and the fiber module 2, the heat emitted by the shell 12 is blocked from being conducted toward the support plate 1, thereby improving the thermal efficiency of the heating furnace radiation tube, thereby generating economy and environmental protection for the entire heating furnace, especially reducing the difficulty of precise control of temperature rise; a surplus support ring 14 is arranged at the bottom of the tail support ring 13, which can play a good supporting role when the heating wire 9 expands. The heating wire 9 expands and contracts back and forth in the surplus hole 15 with thermal expansion and contraction, avoiding the short circuit phenomenon of the heating wire in the original technology, and can effectively improve the service life of the product.

Claims

1. A heating furnace radiant tube with high energy efficiency and long service life, characterized in that: The invention comprises an outer shell (12), wherein the inner part of the outer shell (12) is provided with a tail support ring (13), a support ring (8), a pressure plate (7), a heat insulation layer (5) and a fiber module (2) in sequence from the inside to the outside, wherein the outer side of the fiber module (2) is contact-connected with a support plate (1), wherein the support plate (1) is outside the outer shell (12), and the outer shell (12) and the support plate (1) are not in contact with each other, wherein the support plate (1), the fiber module (2), the heat insulation layer (5), the pressure plate (7), the support ring (8) and the middle part of the tail support ring (13) are fastened and connected in sequence via a penetrating suspension rod (11), and the tail The upper support ring (13) and the support ring (8) are provided with a heating wire (9); the support plate (1), the fiber module (2) and the heat insulation layer (5) are provided with a lead-out rod (3); the heating wire (9) passes through the pressing plate (7) and is electrically connected to the lead-out rod (3); the distance between the outer shell (12) and the top of the support plate (1) is not less than 100 mm; a surplus support ring (14) is further provided in the outer shell (12); the surplus support ring (14) is in contact with and connected to the bottom of the tail support ring (13); the surplus support ring (14) is provided with a surplus hole (15) at a corresponding position of the heating wire (9); the surplus hole (15) is used to support the elongation of the heating wire (9) when it expands thermally.

2. The high energy efficiency and long life heating furnace radiant tube according to claim 1, characterized in that: The support plate (1), the fiber module (2), the heat insulation layer (5), the pressure plate (7), the support ring (8), the tail support ring (13) and the middle parts of the surplus support ring (14) are fastened in sequence via a penetrating suspension rod (11).

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