A small high temperature environment device

Abstract

The utility model provides a small high-temperature environment device, which comprises two half furnace bodies arranged in a semi-circular ring structure, wherein the two half furnace bodies are hinged to form a complete circular ring structure, wherein the half furnace bodies comprise a furnace shell and a furnace chamber, wherein the furnace chamber is fixedly arranged on the inner side of the furnace shell through an upper cover plate and a lower cover plate, wherein the inner side wall of the furnace chamber is provided with three groups of horizontal grooves distributed up and down, wherein furnace wires are embedded in the horizontal grooves; wherein a ceramic fiber cotton heat insulation layer is arranged on the outer side of the furnace chamber, and an aerogel heat insulation layer is arranged between the ceramic fiber cotton heat insulation layer and the furnace shell.

Description

Technical Field

[0001] This utility model patent belongs to the field of high temperature environment test technology, and specifically relates to a small high temperature environment device. Background Art

[0002] In the process of high-temperature mechanical testing of metal materials, the high-temperature furnace system plays an extremely important role as a key equipment for providing a stable thermal field. Usually, the high-temperature furnace system configured for mechanical testing machines is divided into three types according to the temperature range, with the maximum operating temperatures of 1200℃, 1600℃ and 2000℃ respectively. Among them, the high-temperature furnace system with a maximum operating temperature of 1200℃ is the most commonly used, which can meet the temperature requirements of most materials.

[0003] The common domestic 1200℃ high temperature furnace system usually uses resistance wire as the heating element and performs closed-loop control through PID control instruments to achieve the temperature required by the user. The furnace insulation material generally uses lightweight alumina fiber as the insulation layer.

[0004] According to the current usage statistics of high-temperature furnaces in the market, there are several main problems:

[0005] First, due to the limitation of thermal insulation performance, in order to ensure the surface temperature of the furnace, the furnace diameter is usually large, resulting in the high-temperature furnace occupying a large space. It is only suitable for large-tonnage material testing machines and cannot meet the test needs of small testing machines.

[0006] Secondly, most high-temperature furnaces use nickel-chromium wire as the heating element, but this material's resistance wire has problems such as low resistivity, low surface load and short life;

[0007] Furthermore, the furnace insulation material uses lightweight alumina fiber as the insulation layer. This material has high thermal conductivity and poor extreme cold and rapid heating performance, which can easily lead to cracking of the furnace.

[0008] In addition, the furnace wire heating power supply uses high voltage (220V) power supply, which poses a risk of electric shock;

[0009] Finally, due to the high voltage power supply, the furnace wire diameter is relatively thin, which makes installation difficult. The current installation method is to form the furnace wire and alumina fiber into one piece and bury it in the fiber. This method is difficult to process, has poor molding dimensional accuracy, and most features need to be made by hand, resulting in poor reliability and interchangeability.

[0010] In summary, how to provide an efficient, safe, reliable and easy-to-maintain high-temperature environment for small-scale material testing, meet various application requirements and significantly improve user experience and performance has become a technical problem that needs to be solved urgently. Utility Model Content

[0011] In order to overcome a series of defects existing in the prior art, the purpose of the utility model is to provide a small high-temperature environment device in view of the above-mentioned problems, including two half-furnace bodies arranged in a semi-circular ring structure, the two half-furnace bodies are hinged to form a complete circular ring structure, the half-furnace body includes a furnace shell 4 and a furnace chamber 3, the furnace chamber 3 is fixedly arranged on the inner side of the furnace shell 4 through an upper cover plate 1 and a lower cover plate 2, the inner side wall of the furnace chamber 3 is provided with three groups of horizontal grooves distributed up and down, and furnace wires 6 are embedded in the horizontal grooves; a ceramic fiber wool insulation layer 8 is provided on the outer side of the furnace chamber 3, and an aerogel insulation layer 9 is provided between the ceramic fiber wool insulation layer 8 and the furnace shell 4.

[0012] Preferably, the furnace wires 6 in the three groups of transverse grooves are controlled relatively independently, the furnace wires 6 in the middle are mainly heated, and the furnace wires 6 at the upper and lower sides are compensated for heating.

[0013] Preferably, the contact position between the furnace wire 6 and the furnace chamber 3 is isolated by an insulating terminal, and the furnace wire 6 and the insulating terminal are connected by welding.

[0014] Preferably, a wiring shield is connected to the rear side of the furnace shell 4 by screws, and the furnace wire 6 is led out from the side of the furnace chamber 3 into the wiring shield.

[0015] Preferably, the furnace shell 4 adopts a double-layer metal structure design, and the outermost layer of the double-layer metal structure is provided with heat dissipation holes.

[0016] Preferably, the furnace shell 4 is made of heat-resistant stainless steel, the furnace wire 6 is made of grade iron-chromium-aluminum material resistance wire, and the furnace chamber 3 is formed of hard corundum.

[0017] Preferably, the furnace wire 6 is powered by a low-voltage power supply, and the power supply voltage is less than 36V.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1) With small size design, the furnace diameter and height can meet the use requirements of small material testing machines;

[0020] 2) Use brand iron-chromium-aluminum material resistance wire as the heating element. The iron-chromium-aluminum electric heating alloy has a high operating temperature, the maximum operating temperature can reach 1400 degrees, long service life, high surface load, good anti-oxidation performance, high resistivity, low price, etc.

[0021] 3) The furnace chamber is made of hard corundum, which has the characteristics of high temperature resistance, good rapid cooling and heating performance, high high temperature strength and high dimensional accuracy.

[0022] 4) The insulation layer adopts a multi-layer structure, and the inside is filled with ceramic fiber cotton, which has the characteristics of low thermal conductivity and light weight; the outer periphery adopts aerogel as the insulation layer. Aerogel is the best thermal insulation material on the market with extremely low thermal conductivity.

[0023] 5) The outermost layer of the furnace body is an air convection layer, with a double-layer metal structure design and heat dissipation holes on the outermost layer to ensure the surface temperature of the furnace body and avoid the risk of scalding.

[0024] 6) The furnace wire power supply adopts low-voltage power supply mode, and the power supply voltage is less than 36V, which avoids the risk of electric shock.

[0025] 7) The furnace wire has a thick diameter and is separated from the furnace, which has the characteristics of long service life, strong interchangeability, easy installation, and convenient subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is one of the overall structural schematic diagrams of the small high-temperature environment device disclosed in this application.

[0027] Figure 2 This is the second overall structural schematic diagram of the small high-temperature environment device disclosed in this application.

[0028] Figure 3 It is a cross-sectional view of the small high-temperature environment device disclosed in this application.

[0029] Figure 4 This is a top view of the small high-temperature environment device disclosed in this application.

[0030] 1-upper cover, 2-lower cover, 3-furnace, 4-furnace shell, 5-cable protective pipe joint, 6-furnace wire, 7-thermal field, 8-ceramic fiber wool insulation layer, 9-aerogel insulation layer. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the implementation of the utility model clearer, the technical scheme in the embodiment of the utility model will be described in more detail below in conjunction with the drawings in the embodiment of the utility model. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the utility model, not all of the embodiments.

[0032] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0033] The embodiments and directional terms described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limitations on the present invention.

[0034] In a broad embodiment of the utility model, a small high-temperature environment device includes two half furnace bodies arranged in a semi-circular ring structure, the two half furnace bodies are hinged to form a complete circular ring structure, the half furnace body includes a furnace shell 4 and a furnace chamber 3, the furnace chamber 3 is fixed to the inner side of the furnace shell 4 through an upper cover plate 1 and a lower cover plate 2, the inner side wall of the furnace chamber 3 is provided with three groups of horizontal grooves distributed up and down, and furnace wires 6 are embedded in the horizontal grooves; a ceramic fiber cotton insulation layer 8 is provided on the outer side of the furnace chamber 3, and an aerogel insulation layer 9 is provided between the ceramic fiber cotton insulation layer 8 and the furnace shell 4.

[0035] Preferably, the furnace wires 6 in the three groups of transverse grooves are controlled relatively independently, the furnace wires 6 in the middle are mainly heated, and the furnace wires 6 at the upper and lower sides are compensated for heating.

[0036] Preferably, the contact position between the furnace wire 6 and the furnace chamber 3 is isolated by an insulating terminal, and the furnace wire 6 and the insulating terminal are connected by welding.

[0037] Preferably, a wiring shield is connected to the rear side of the furnace shell 4 by screws, and the furnace wire 6 is led out from the side of the furnace chamber 3 into the wiring shield.

[0038] Preferably, the furnace shell 4 adopts a double-layer metal structure design, and the outermost layer of the double-layer metal structure is provided with heat dissipation holes.

[0039] Preferably, the furnace shell 4 is made of heat-resistant stainless steel, the furnace wire 6 is made of grade iron-chromium-aluminum material resistance wire, and the furnace chamber 3 is formed of hard corundum.

[0040] Preferably, the furnace wire 6 is powered by a low-voltage power supply, and the power supply voltage is less than 36V.

[0041] The preferred embodiments of the present invention are listed below in conjunction with the accompanying drawings to further describe the present invention in detail.

[0042] like Figure 1-4 As shown, the small high-temperature environment device disclosed in the present application is a high-temperature environment accessory, which adopts a small-size design and uses the heating principle of a resistance wire to make the furnace reach a certain set temperature. It is a cylindrical split structure, and the left and right half furnace bodies are connected by a metal hinge at the rear to achieve a rotating opening and closing action. The sample to be tested is placed in the heat field 7 in the middle of the device. To ensure uniform temperature on the sample, the middle furnace wire 6 is mainly heated, and the upper and lower furnace wires 6 are used as compensation heating. The three sections of furnace wire 6 are independently controlled by a PID control instrument. The temperature sensor is set on the sample, and a closed-loop control is formed through real-time temperature feedback. The insulation layer adopts a multi-layer structure to ensure the internal and external temperatures, which can not only use high temperatures but also avoid the risk of scalding.

[0043] The small-sized high-temperature environment device disclosed in the present application is mainly composed of a furnace shell 4, a furnace chamber 3, a furnace wire 6, a ceramic fiber wool insulation layer 8, an aerogel insulation layer 9, an insulating terminal and the like.

[0044] The positions and connection relationships between the various components are as follows: the furnace shell 4 serves as the main frame; the furnace 3 is located in the innermost space and is fixed by the upper cover plate 1 and the lower cover plate 2; the furnace wire 6 is embedded in the horizontal groove of the furnace 3, and the furnace wire 6 is led out from the side of the furnace 3 to the wiring shield. The contact position between the furnace wire 6 and the furnace 3 is isolated by an insulating terminal, and the furnace wire 6 and the insulating terminal are connected by welding. The outer layer of the furnace 3 is a ceramic fiber cotton insulation layer 8. After the furnace 3 is fixed, the ceramic fiber cotton is filled in by manual filling and compacted. The ceramic fiber cotton is coated with an aerogel insulation layer 9, which is located between the ceramic fiber cotton insulation layer 8 and the furnace shell 4 and is fixed by extrusion between the layers. The wiring shield is located at the rear of the furnace body, and the wiring shield is connected to the furnace shell 4 by screws. The cable protection pipe joint 5 is located at the rear lower part of the furnace shell 4.

[0045] The furnace shell 4, as the foundation of the entire device, is made of heat-resistant stainless steel, which can ensure high strength under high temperature conditions and ensure the mechanical stability of the entire device. The furnace chamber 3 is formed of hard corundum, which serves as the main carrier of the resistance wire and plays the role of insulation, high temperature resistance and heat insulation. The furnace wire 6, as a heat source, provides heat to achieve a maximum furnace temperature of 1200°C and is a key component of the entire device. The ceramic fiber wool insulation layer 8 is the most important thermal insulation layer, and most of the heat is provided by it. The aerogel insulation layer 9 is an external supplementary insulation layer. Due to the temperature limit of the material, it is fixed on the periphery of the ceramic fiber insulation layer to play a role of supplementary insulation. The insulating terminal serves to insulate and connect external cables.

[0046] Compared with the existing high-temperature furnaces on the market, this application has the characteristics of small size, light weight, high operating temperature, good thermal insulation performance and long life, which has great advantages in dealing with small mechanical test systems or environments with limited space. It fills the gap in the field of small mechanical high-temperature test devices and promotes the progress and rapid development of related fields of material mechanics research.

[0047] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A small high temperature environment device, characterized in that: The invention comprises two half furnace bodies arranged in a semicircular ring structure, wherein the two half furnace bodies are hinged to form a complete circular ring structure, wherein the half furnace bodies comprise a furnace shell (4) and a furnace chamber (3), wherein the furnace chamber (3) is fixedly arranged on the inner side of the furnace shell (4) through an upper cover plate (1) and a lower cover plate (2), wherein the inner side wall of the furnace chamber (3) is provided with three groups of vertically distributed horizontal grooves, wherein furnace wires (6) are embedded in the horizontal grooves; a ceramic fiber cotton heat insulation layer (8) is arranged on the outer side of the furnace chamber (3), and an aerogel heat insulation layer (9) is arranged between the ceramic fiber cotton heat insulation layer (8) and the furnace shell (4).

2. A small high temperature environment device according to claim 1, characterized in that: The furnace wires (6) in the three groups of horizontal grooves are controlled relatively independently, the furnace wires (6) located in the middle are mainly heated, and the furnace wires (6) located at the upper and lower sides are compensated for heating.

3. A small high temperature environment device according to claim 1, characterized in that: The contact position between the furnace wire (6) and the furnace chamber (3) is isolated by using an insulating terminal, and the furnace wire (6) and the insulating terminal are connected by welding.

4. A small high temperature environment device according to claim 1, characterized in that: The rear side of the furnace shell (4) is connected to a wiring shield via screws, and the furnace wire (6) is led out from the side of the furnace chamber (3) into the wiring shield.

5. A small high temperature environment device according to claim 1, characterized in that: The furnace shell (4) adopts a double-layer metal structure design, and the outermost layer of the double-layer metal structure is provided with heat dissipation holes.

6. A small high temperature environment device according to any one of claims 1 to 5, characterized in that: The furnace shell (4) is made of heat-resistant stainless steel, the furnace wire (6) is made of grade iron-chromium-aluminum resistance wire, and the furnace chamber (3) is made of hard corundum.

7. A small high temperature environment device according to claim 6, characterized in that: The furnace wire (6) is powered by a low-voltage power supply, and the power supply voltage is less than 36V.

Images