High-temperature tube furnace

Abstract

The utility model discloses a high temperature tube furnace, including end cover, furnace shell, heat preservation layer, furnace wire, support mechanism and cavity, the end cover is connected to the both ends of furnace shell, the support mechanism is arranged in the furnace shell and supports the furnace shell, the cavity is arranged in the furnace shell in a penetrating way, the inner wall of the heat preservation layer is uniformly provided with furnace wire grooves, and the furnace wire grooves are arranged in the furnace shell in a penetrating way. A plurality of furnace wire grooves are formed in the inner wall of the heat preservation layer, supporting rods are arranged in the furnace wire grooves, a plurality of steps are further formed in the inner wall of the heat preservation layer, the supporting mechanism comprises ceramic rings, the ceramic rings are arranged in the steps, the supporting rods are connected between the adjacent ceramic rings, and furnace wires are wound on the supporting rods. The supporting rods are arranged between the ceramic rings, the furnace wires are wound on the supporting rods, and the furnace wires are supported by the supporting rods, so that the furnace wires are prevented from being softened and drooping.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tubular furnace, concretely to a high temperature tubular furnace. BACKGROUND

[0002] The high temperature tubular furnace is a kind of heating equipment in many industrial fields. It can carry out heat treatment, sintering, synthesis and other operations on various materials under high temperature environment, and is one of the key equipment to realize material performance optimization and new product development.

[0003] In the past traditional high temperature tubular furnace usually adopts the scheme that resistance wire outer side is wrapped with heat preservation cotton, but because furnace temperature is too high, it often leads to excessive heat loss, increases energy consumption, also can make the temperature of furnace body outside too high, and the outer shell of furnace body is hot deformation or even collapse, thereby causing security risks to surrounding environment and operating personnel, and more, because of the softening and drooping of furnace wire, the furnace wire contacts cavity, which leads to cavity damage, thereby increasing use cost and slowing down production progress, therefore, the high temperature tubular furnace is designed to avoid the softening and drooping of furnace wire. SUMMARY

[0004] The utility model discloses a kind of high temperature tubular furnaces, by being set in step in furnace body, ceramic ring is set in step, support rod is inserted between ceramic ring, furnace wire is wound on support rod, support rod is used to support furnace wire, avoid the softening and drooping of furnace wire under high temperature.

[0005] The utility model provides the following technical scheme: a kind of high temperature tubular furnace, including end cap, furnace shell, heat preservation layer, furnace wire, support mechanism and cavity, the end cap is connected at the both ends of furnace shell, the support mechanism is set in furnace shell, and furnace shell is supported, the cavity is set in furnace shell, the inner wall of the heat preservation layer is evenly provided with furnace wire slot, the support rod is set in the furnace wire slot, the inner wall of the heat preservation layer is also provided with multiple steps, the support mechanism includes ceramic ring, the ceramic ring is set in step, the support rod is connected between adjacent ceramic ring, and the support rod is wound with furnace wire.

[0006] According to the above technical scheme, the furnace wire includes a plurality of circumferentially distributed spiral heating bodies, the spiral heating bodies are in the shape of a spiral spring, and the plurality of spiral heating bodies are connected end to end by a furnace wire bridge. The spiral heating bodies at both ends are each connected to a lead wire. The spiral heating bodies are heated by passing current through the lead wires.

[0007] According to the above technical scheme, the end cap includes a support plate and a fixed plate. The fixed plate is distributed on the outer circle of the support plate. The fixed plate is riveted to the furnace shell.

[0008] According to the above technical scheme, the outer diameter of the ceramic ring is smaller than the inner diameter of the step, and the inner diameter of the ceramic ring is the same as the inner diameter of the heat preservation layer.

[0009] According to the above technical scheme, the ceramic ring is composed of four arc-shaped pieces, one end of the arc-shaped piece is convex, the other end is concave, and the four arc-shaped pieces are connected end to end to form a circular ring.

[0010] According to the above technical scheme, a waist hole is formed on the ceramic ring for inserting the supporting rod, and the waist hole can fine-tune the supporting rod, facilitating the installation of the supporting rod.

[0011] According to the above technical scheme, the middle of the heat preservation layer is provided with expansion joints, which can relieve the stress caused by thermal expansion and avoid structural damage.

[0012] According to the above technical scheme, the supporting rod is made of corundum, and the ceramic ring is made of mullite.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] (1) By setting steps in the furnace body, ceramic rings are arranged in the steps, supporting rods are inserted between the ceramic rings, and the heating wire is wound on the supporting rods, the supporting rods are used to support the heating wire, and the softening and sagging of the heating wire under high temperature is avoided.

[0015] (2) The supporting rods are arranged in sections between the ceramic rings, which reduces the length of the heating wire wound on the supporting rods, and further avoids the softening and sagging of the heating wire. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0017] Figure 1 It is a sectional view of the high-temperature tubular furnace of the utility model;

[0018] Figure 2 It is a mounting structure schematic view of the furnace shell and the end cover of the utility model;

[0019] Figure 3 It is a partial enlarged schematic view of Figure 2

[0020] Figure 4 It is a mounting structure schematic view of the supporting rod and the heat preservation layer of the utility model;

[0021] Figure 5 It is a mounting structure view of the heating wire of the utility model;

[0022] Figure 6 It is a structure schematic view of the step of the utility model;

[0023] ​Figure 7 is a structure diagram of the ceramic ring of the utility model;

[0024] Figure 8 is a side view of the ceramic ring of the utility model;

[0025] Figure 9 is a partition diagram of the heat preservation layer of the utility model;

[0026] Figure 10 is a structure diagram of the furnace wire of the utility model;

[0027] In the drawing: 1, end cover; 11, support plate; 12, fixed plate; 2, furnace shell; 3, heat preservation layer; 31, heat preservation outer wall; 32, grid; 33, furnace wire groove; 34, step; 35, expansion joint; 4, furnace wire; 41, spiral heating body; 42, furnace wire bridge; 43, lead wire; 5, support mechanism; 51, support rod; 52, ceramic ring; 6, cavity. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] Please refer to Figure 1 , 3 , 4 and 5, the utility model provides technical scheme: a high temperature tubular furnace, including end cover 1, furnace shell 2, heat preservation layer 3, furnace wire 4, support mechanism 5 and cavity 6, end cover 1 is connected at both ends of furnace shell 2, support mechanism 5 is set up in furnace shell 2, and furnace shell 2 is supported, and cavity 6 is set up in furnace shell 2, and the inner wall of heat preservation layer 3 is evenly provided with furnace wire groove 33, and heat preservation layer 3 includes heat preservation outer wall 31, and grid 32 is formed between furnace wire groove 33, and furnace wire 4 is arranged in furnace wire groove 33, and furnace wire 4 is used to heat the material in heat preservation layer 3, and support rod 51 is arranged in furnace wire groove 33, and a plurality of steps 34 are also arranged on the inner wall of heat preservation layer 3, and steps 34 are distributed along the axial direction of furnace shell 2, and support mechanism 5 includes ceramic ring 52, ceramic ring 52 is arranged in step 34, step 34 is used to position ceramic ring 52, support rod 51 is connected between adjacent ceramic rings 52, and furnace wire 4 is wound on support rod 51, and support rod 51 supports furnace wire 4, avoids that furnace wire 4 softens and droops under high temperature, makes furnace wire 4 contact cavity 6, and causes cavity 6 to be damaged.

[0030] As Figure 8 and 10As shown, the heating wire 4 includes a plurality of circumferentially distributed spiral heating bodies 41, which are in the shape of spiral springs, each of which is wound on a support rod 51, and the plurality of spiral heating bodies 41 are connected end to end through a heating wire bridge 42 and are distributed in the heating wire groove 33, and the spiral heating bodies 41 at both ends are connected with lead wires 43, and the spiral heating bodies 41 are heated by being powered through the lead wires 43 to heat the cavity 6.

[0031] As shown in the Figure 2 As shown, the end cover 1 includes a support plate 11 and a fixed plate 12, the fixed plate 12 is distributed on the outer circle of the support plate 11, and the fixed plate 12 is riveted to the furnace shell 2 to fix the support plate 11 on the end of the furnace shell 2.

[0032] As shown in the Figure 6 As shown, the outer diameter of the ceramic ring 52 is smaller than the inner diameter of the step 34, and the inner diameter of the ceramic ring 52 is the same as the inner diameter of the heat preservation layer 3, so that the produced bar can smoothly pass through the ceramic ring 52, and the ceramic ring 52 is positioned by the step 34 and installed on the inner wall of the heat preservation layer 3.

[0033] As shown in the Figure 7 and 8 As shown, the ceramic ring 52 is composed of four arc-shaped pieces, one end of each arc-shaped piece is convex, and the other end is concave, the four arc-shaped pieces are connected end to end to form a ring, which facilitates positioning and installation of the arc-shaped pieces.

[0034] The ceramic ring 52 is provided with a waist hole for inserting the support rod 51, which facilitates fine adjustment of the support rod 51 and makes the installation of the support rod 51 convenient.

[0035] The heat preservation layer 3 is provided with a expansion joint 35 in the middle, which is used to relieve the stress caused by thermal expansion and avoid damage to the structure.

[0036] The support rod 51 is made of corundum, and the ceramic ring 52 is made of mullite, and corundum ceramic and mullite ceramic can completely adapt to a working temperature of 1050℃.

[0037] As shown in the Figure 9 As shown, the plurality of spiral heating bodies 41 are divided into six temperature control zones, namely 1, 2, 3, 4, 5 and 6 temperature control zones, and the six-temperature-zone independent temperature control mode is adopted in this embodiment, which is more conducive to improving the temperature uniformity in the furnace.

[0038] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application have been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. A high-temperature tube furnace comprising an end cover, a furnace shell, an insulation layer, a furnace wire, a supporting mechanism and a cavity, the end cover is connected at both ends of the furnace shell, the supporting mechanism is arranged in the furnace shell to support the furnace shell, and the cavity is arranged through the furnace shell, characterized in that: The inner wall of the heat preservation layer is uniformly provided with furnace wire grooves, and the furnace wire grooves are provided with support rods; the inner wall of the heat preservation layer is also provided with multiple steps; the support mechanism comprises ceramic rings, the ceramic rings are arranged in the steps, the support rods are connected between adjacent ceramic rings, and the support rods are wound with furnace wires. ​ 2. A high temperature tube furnace according to claim 1, characterized in that: The furnace wire comprises multiple circumferentially distributed spiral heating bodies, the spiral heating bodies are in the shape of spiral springs, the multiple spiral heating bodies are connected in a head-to-tail mode through a furnace wire bridge, and the spiral heating bodies at both ends are connected with lead wires; the spiral heating bodies are heated through the lead wires.

3. A high temperature tube furnace according to claim 1, characterized in that: The end cover comprises a support plate and a fixing plate, the fixing plate is distributed on the outer circle of the support plate, and the fixing plate is riveted to the furnace shell.

4. A high temperature tube furnace according to claim 1, characterized in that: The outer diameter of the ceramic ring is smaller than the inner diameter of the step, and the inner diameter of the ceramic ring is the same as the inner diameter of the heat preservation layer.

5. A high temperature tube furnace according to claim 4, characterised in that: The ceramic ring is composed of four arc-shaped pieces, one end of each arc-shaped piece is convex, and the other end is concave, and the four arc-shaped pieces are connected in a head-to-tail mode to form a ring.

6. A high temperature tube furnace according to claim 4, characterized in that: A waist hole is arranged on the ceramic ring for inserting the support rod.

7. A high temperature tube furnace according to claim 1, characterized in that: A expansion joint is arranged in the middle of the heat preservation layer.

8. A high temperature tube furnace according to claim 4, characterized in that: The support rod is made of corundum, and the ceramic ring is made of mullite.

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