CN218884680U - Heat-resistant furnace shell and aluminum nitride ceramic continuous sintering furnace - Google Patents

Abstract

The utility model relates to a heat-resisting type stove outer covering and continuous fritting furnace of aluminium nitride pottery, heat-resisting type stove outer covering outside-in is the shell in proper order, inner shell and volcanic rock heat preservation, both ends sealing connection between shell and the inner shell, and form the water-cooling cavity between shell and the inner shell, the shell is connected with inlet channel and outlet conduit, inlet channel and outlet conduit all communicate with the water-cooling cavity, it has the glass fiber layer to fill between inner shell and the volcanic rock heat preservation, the inner wall of inner shell encircles and is provided with a plurality of first fins, the distance that first fin deviates from between the outer end border of inner shell and the inner shell is less than the thickness of water-cooling cavity. Above-mentioned technical scheme reduces the temperature of shell and inner shell through water-cooling and thermal-insulated dual mode and avoids the temperature of shell and inner shell higher to can prevent that scaling loss, deformation, fracture scheduling problem from appearing easily with the inner shell, the life of extension shell and inner shell avoids needing frequent maintenance, and then avoids influencing normal production operation, reduction in production cost.

Description

Heat-resistant furnace shell and aluminum nitride ceramic continuous sintering furnace

Technical Field

The application relates to the technical field of continuous sintering furnaces, in particular to a heat-resistant furnace shell and an aluminum nitride ceramic continuous sintering furnace.

Background

The aluminum nitride ceramic has high thermal conductivity, relatively low dielectric constant and dielectric loss, and a series of excellent performances of thermal expansion coefficient matched with silicon, no toxicity, insulation and the like, and is considered as a first choice material of a new generation of high-performance ceramic substrate, electronic packaging and other heat dissipation devices. The aluminum nitride powder is a raw material for preparing the aluminum nitride ceramic, and the properties of the aluminum nitride powder, such as purity, granularity, oxygen content and other impurity content, have important influence on the thermal conductivity of the prepared aluminum nitride ceramic and subsequent sintering and forming processes. In order to obtain an aluminum nitride ceramic material with excellent properties, aluminum nitride powder with high purity, fine particle size, narrow particle size distribution and stable properties must be prepared.

The preparation method of the aluminum nitride powder mainly comprises a carbothermic reduction method. The aluminum nitride powder prepared by the carbothermic method has the characteristics of high purity, fine granularity, narrow granularity distribution and the like, and is suitable for molding processes such as tape casting, injection molding and the like. The most critical part of the aluminum nitride ceramic manufacturing process is sintering and forming of the multilayer co-fired ceramic substrate, which is characterized in that green ceramic sheets are placed in an oxidation-reduction atmosphere for sintering after wiring, lamination and lamination, and the green ceramic is matured and metal powder is metalized in high-temperature sintering, so the process is called co-firing.

In the prior art, the preparation of aluminum nitride powder by carbothermic reduction method and the preparation of aluminum nitride ceramic by cofiring are all sintered by a graphite furnace or a continuous sintering furnace (the continuous sintering furnace is also called a push plate furnace). The heat preservation furnace lining of the existing continuous sintering furnace is built by volcanic rocks, and the preparation temperature of the aluminum nitride powder and the aluminum nitride ceramics needs to reach more than 2000 ℃, so that the heat preservation performance of the heat preservation furnace lining built by the volcanic rocks is poor, heat in a hearth is lost and transmitted to a furnace shell made of metal, the temperature of the furnace shell is high, the problems of burning loss, deformation, cracking and the like of the furnace shell are easily caused, the service life of the furnace shell is shortened, frequent maintenance is needed, normal production operation is influenced, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to solve the problems that the thermal insulation performance of the thermal insulation furnace lining built by vesuvianite is poor, the temperature of the furnace shell is high due to heat dissipation in the hearth, the furnace shell is easy to burn, deform, crack and the like, the service life of the furnace shell is shortened, frequent maintenance is needed, normal production operation is influenced, and the production cost is increased in the prior art. The application provides a heat-resistant type stove outer covering and continuous fritting furnace of aluminium nitride pottery, the temperature of avoiding shell and inner shell through water-cooling and thermal-insulated dual mode reduction shell and inner shell is higher to can prevent that the scaling loss, deformation, fracture scheduling problem from appearing easily in shell and inner shell, prolong the life of shell and inner shell, avoid needing the frequent maintenance, and then avoid influencing normal production operation, reduction in production cost.

The utility model provides a heat-resistant type stove outer covering, heat-resistant type stove outer covering outside-in is shell, inner shell and volcanic rock heat preservation in proper order, the shell with both ends sealing connection between the inner shell, just the shell with form the water-cooling cavity between the inner shell, the shell is connected with inlet channel and outlet conduit, the inlet channel with outlet conduit all with the water-cooling cavity intercommunication, the inner shell with it has the glass fiber layer to fill between the volcanic rock heat preservation, the inner wall of inner shell encircles and is provided with a plurality of first fins, first fin deviates from the outer end border of inner shell with distance between the inner shell is less than the thickness of water-cooling cavity.

Preferably, in the above heat-resistant furnace shell, the water inlet pipeline is disposed at the bottom of the shell, and the water outlet pipeline is disposed at the top of the shell.

Preferably, in the above heat-resistant furnace shell, the pipe diameter of the water outlet pipe is greater than the pipe diameter of the water inlet pipe.

Preferably, in the above heat-resistant furnace shell, the water inlet pipeline is provided with a high-pressure water pump.

Preferably, in the above heat-resistant furnace shell, a graphite plate is bonded to an inner wall of the volcanic stone insulating layer on a side away from the glass fiber layer.

Preferably, in the above heat-resistant furnace shell, a reflective heat insulation film is bonded to an inner wall of the graphite plate on a side away from the volcanic rock insulating layer.

Preferably, in the above heat-resistant furnace shell, a distance between an outer end edge of the first fin, which is away from the inner shell, and the inner shell is a first distance, and a thickness of the water-cooling chamber is greater than 2 times of the first distance.

Preferably, in the above furnace shell of a heat resistant type, the outer wall of the shell is provided with a plurality of second fins.

An aluminum nitride ceramic continuous sintering furnace comprises the heat-resistant furnace shell.

The technical scheme adopted by the application can achieve the following beneficial effects:

the embodiment of the application discloses a heat-resistant type stove outer covering and aluminium nitride pottery in continuous sintering furnace, cool down shell and inner shell through this kind of water-cooled mode on the one hand, the temperature of avoiding shell and inner shell is higher, and encircle to set up a plurality of first fins at the inner wall of shell, with the increase water-cooling effect, help further reducing the temperature of shell and inner shell, on the other hand, it has the glass fiber layer to fill between shell and volcanic rock heat preservation, the glass fiber layer has good heat-proof quality, can obstruct heat transfer to shell and inner shell on, reduce the temperature of shell and inner shell. The temperature that avoids shell and inner shell through water-cooling and thermal-insulated dual mode reduces shell and inner shell is higher to can prevent that shell and inner shell from appearing burning loss, deformation, fracture scheduling problem easily, the life of extension shell and inner shell avoids needing frequent maintenance, and then avoids influencing normal production operation, reduction in production cost.

Drawings

FIG. 1 is a schematic view of a continuous sintering furnace for aluminum nitride ceramics according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a heat resistant furnace shell according to an embodiment of the present application;

fig. 3 is a schematic cross-sectional view at another angle of a furnace shell of a heat resistant type as disclosed in an embodiment of the present application.

Wherein: the water cooling device comprises an outer shell 100, a water inlet pipeline 110, a water outlet pipeline 120, a second fin 130, an inner shell 200, a first fin 210, a volcanic rock heat-insulating layer 300, a graphite plate 310, a water cooling chamber 400, a glass fiber layer 500, a feeding mechanism 600, a discharging mechanism 700 and a control electric cabinet 800.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "top," "bottom," "top," and the like are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, an embodiment of the present invention discloses a heat-resistant furnace shell, which includes an outer shell 100, an inner shell 200, and a volcanic rock insulation layer 300 in sequence from outside to inside, wherein the outer shell 100 is disposed around the inner shell 200, and two ends of the outer shell 100 and the inner shell 200 are hermetically connected to form a water-cooled cavity 400 between the outer shell 100 and the inner shell 200, the outer shell 100 is connected to a water inlet pipe 110 and a water outlet pipe 120, both the water inlet pipe 110 and the water outlet pipe 120 are communicated with the water-cooled cavity 400, when heat is dissipated to the outer shell 100 and the inner shell 200 due to poor insulation effect of the volcanic rock insulation layer 300, when temperatures of the outer shell 100 and the inner shell 200 are high, cooling water is introduced into the water-cooled cavity 400 through the water inlet pipe 110 to absorb heat on the outer shell 100 and the inner shell 200, and then discharged from the water outlet pipe 120, so as to absorb heat on the outer shell 100 and the inner shell 200, thereby reducing temperatures of the outer shell 100 and the inner shell 200, and the water-cooled shell 100 and the inner shell 200 are cooled by this way, thereby reducing temperatures, avoiding problems of the temperature of the outer shell 100 and the inner shell 200, avoiding frequent cracking, and inner shell 200, and the problem of the maintenance, and the reduction of the production cost, and the reduction of the maintenance cost.

Further, the inner wall of the inner shell 200 is provided with a plurality of first fins 210 in a surrounding manner, after cooling water is introduced into the water-cooling cavity 400, the cooling water can be in full contact with the first fins 210, and the heat absorption area of the cooling water can be increased by the first fins 210, so that more heat on the inner shell 200 can be absorbed and taken away, the water-cooling effect can be increased, and the temperature of the outer shell 100 and the temperature of the inner shell 200 can be further reduced. In order to avoid the influence on the normal circulation of the cooling water caused by the arrangement of the plurality of first fins 210 on the inner wall of the inner shell 200, the distance between the outer end edge of the first fin 210 departing from the inner shell 200 and the inner shell 200 is smaller than the thickness of the water-cooling chamber 400, and the distance between the outer end edge of the first fin 210 departing from the inner shell 200 and the inner shell 200 can be considered as the height of the first fin 210, that is, the height of the first fin 210 is smaller than the thickness of the water-cooling chamber 400, which means that a gap for the circulation of the cooling water is formed between the outer end edge of the first fin 210 departing from the inner shell 200 and the outer shell 100, so that the outer shell 100 and the inner shell 200 can be cooled by the water.

Specifically, the housing 100 may be a metal housing, such as a stainless steel housing. The inner shell 200 can be a fiber ceramic inner shell, because the inner shell 200 made of a fiber ceramic material has certain heat insulation performance, a part of heat can be isolated from being transferred to the outer shell 100, thereby being beneficial to reducing the temperature of the outer shell 100 and avoiding the outer shell 100 from burning and losing and other faults, meanwhile, the inner shell 200 made of a fiber ceramic material has higher heat resistance, cannot be easily burnt and lost by heat dissipated by a hearth, and further can prevent the outer shell 100 and the inner shell 200 from easily burning, deforming, cracking and other problems.

The volcanic rock heat-insulating layer 300 is a heat-insulating furnace lining built by volcanic rocks in the prior art, the heat-insulating property is poor, a glass fiber layer 500 is filled between the inner shell 200 and the volcanic rock heat-insulating layer 300, the glass fiber layer 500 has good heat-insulating property, heat can be prevented from being transferred to the outer shell 100 and the inner shell 200, and the temperature of the outer shell 100 and the temperature of the inner shell 200 are reduced.

In the disclosed heat-resistant type stove outer covering of this application embodiment, on the one hand, cool down shell 100 and inner shell 200 through this kind of water-cooling mode, the temperature of avoiding shell 100 and inner shell 200 is higher, and encircle to set up a plurality of first fins 210 at the inner wall of inner shell 200, in order to increase water-cooling effect, help further reducing the temperature of shell 100 and inner shell 200, on the other hand, it has glass fiber layer 500 to fill between shell 200 and volcanic rock heat preservation 300, glass fiber layer 500 has good heat-proof quality, can obstruct heat transfer to shell 100 and inner shell 200 on, reduce the temperature of shell 100 and inner shell 200. The temperature that reduces shell 100 and inner shell 200 through water cooling and thermal-insulated two kinds of modes avoids shell 100 and inner shell 200 is higher to can prevent that shell 100 and inner shell 200 from appearing burning loss, deformation, fracture scheduling problem easily, the life of extension shell 100 and inner shell 200 avoids needing frequent maintenance, and then avoids influencing normal production operation, reduction in production cost.

Further, inlet channel 110 can set up in the shell 100 bottom, outlet conduit 120 sets up in the shell 100 top, cooling water gets into from water-cooling chamber 400 bottom, the top is discharged, can make cooling water be full of water-cooling chamber 400, so that cooling water can fully contact with shell 100 and inner shell 200, thereby can absorb more heat on shell 100 and the inner shell 200 and take away, and then can increase the water-cooling effect, help further reducing the temperature of shell 100 and inner shell 200, and then can further prevent that shell 100 and inner shell 200 from appearing burning loss, deformation, fracture scheduling problem easily.

Further, the pipe diameter of the water outlet pipe 120 may be greater than the pipe diameter of the water inlet pipe 110, so that the cooling water discharge rate can be increased, the problem that the cooling water with higher temperature is accumulated in the water cooling chamber 400 after heat exchange due to the fact that the pipe diameter of the water outlet pipe 120 is smaller than the pipe diameter of the water inlet pipe 110, and the problem that the water cooling effect is poor is caused due to the fact that the water inlet rate of the water cooling chamber 400 after being filled with water is low due to the fact that the pipe diameter of the water outlet pipe 120 is smaller than the pipe diameter of the water inlet pipe 110, and the water cooling effect is poor is caused, and therefore the water cooling effect can be further improved due to the arrangement.

Further, the water inlet pipe 110 is provided with a high pressure water pump to increase the flow rate of the cooling water so that more cooling water flows through the water cooling chamber 400 per unit time, thereby taking away more heat, and thus the water cooling effect can be further improved by such an arrangement.

Preferably, a graphite plate 310 may be bonded to an inner wall of the volcanic rock insulation layer 300 facing away from the glass fiber layer 500. The high temperature resistance performance of graphite cake 310 is better than volcanic stone heat preservation 300, can satisfy the requirement of furnace high temperature sintering, and graphite cake 310 also can play thermal-insulated effect, can improve the thermal insulation performance of heat-resistant type stove outer covering to further can obstruct heat transfer to shell 100 and inner shell 200 on, reduce the temperature of shell 100 and inner shell 200, and then make graphite cake 310 have a dual-purpose effect.

Further, a reflective heat insulation film may be bonded to an inner wall of the graphite plate 310 facing away from the volcanic rock heat insulation layer 300. The reflective heat insulation film achieves the purpose of heat insulation by reflecting infrared heat, so that heat is prevented from being transferred to the graphite plate 310, heat transfer loss is reduced from the source, the heat insulation performance of the heat-resistant furnace shell can be further improved, and heat can be further prevented from being transferred to the outer shell 100 and the inner shell 200.

Specifically, the reflective heat insulation film can be graphite paper, the graphite paper has good high temperature resistance, the surface of the graphite paper is smooth and is a mirror surface, and infrared heat can be reflected to achieve the purpose of heat insulation.

In order to further reduce the temperature of the casing 100, optionally, the outer wall of the casing 100 is provided with a plurality of second fins 130, and by providing the plurality of second fins 130, the heat exchange area between the casing 100 and the air is increased, so as to improve the heat dissipation efficiency of the casing 100, and further, the temperature of the casing 100 can be further reduced, and the burning loss of the casing is avoided.

As described above, in order to avoid influencing the normal flow of the cooling water due to the arrangement of the plurality of first fins 210 on the inner wall of the inner casing 200, the distance between the outer end edge of the first fin 210 departing from the inner casing 200 and the inner casing 200 is smaller than the thickness of the water-cooling chamber 400, further, the distance between the outer end edge of the first fin 210 departing from the inner casing 200 and the inner casing 200 is a first distance, the thickness of the water-cooling chamber 400 is greater than a first distance of 2 times, that is, the thickness of the water-cooling chamber 400 is greater than the height of the first fin 210 of 2 times, that is, the gap between the outer end edge of the first fin 210 departing from the inner casing 200 and the outer casing 100 is greater than the first distance, the sufficient flow of the cooling water can be ensured due to the arrangement, the problem that the flow of the cooling water is slow due to the smaller gap is avoided, the water-cooling effect is poor, and the water-cooling effect is ensured.

The embodiment of the application also discloses an aluminum nitride ceramic continuous sintering furnace, including as any embodiment above a heat-resistant type stove outer covering, still include feed mechanism 600, discharge mechanism 700 and electric control cabinet 800, feed mechanism 600 sets up in the one end of heat-resistant type stove outer covering, discharge mechanism 700 sets up in the other end electric control cabinet 800 and the equal electricity of heat-resistant type stove outer covering, feed mechanism 600 and discharge mechanism 700 of heat-resistant type stove outer covering and is connected. After the high-heat-preservation furnace body structure is adopted, the aluminum nitride ceramic continuous sintering furnace adopts the high-heat-preservation furnace body structure, the temperature of the outer shell 100 and the temperature of the inner shell 200 are reduced through two modes of water cooling and heat insulation, so that the temperature of the outer shell 100 and the temperature of the inner shell 200 are prevented from being higher, the problems of burning loss, deformation, cracking and the like of the outer shell 100 and the inner shell 200 can be prevented, the service lives of the outer shell 100 and the inner shell 200 are prolonged, frequent maintenance is avoided, normal production operation is prevented from being influenced, and the production cost is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.

Claims (9)

1. The utility model provides a heat-resisting type stove outer casing, characterized in that, heat-resisting type stove outer casing is outer shell (100), inner shell (200) and volcanic rock heat preservation (300) from the outside-in proper order, outer shell (100) with both ends sealing connection between inner shell (200), just outer shell (100) with form water-cooling cavity (400) between inner shell (200), outer shell (100) are connected with inlet channel (110) and outlet conduit (120), inlet channel (110) with outlet conduit (120) all with water-cooling cavity (400) intercommunication, inner shell (200) with it has glass fiber layer (500) to fill between volcanic rock heat preservation (300), the inner wall of inner shell (200) encircles and is provided with a plurality of first fins (210), first fin (210) deviate from the outer end border of inner shell (200) with the distance between inner shell (200) is less than the thickness of water-cooling cavity (400).

2. A furnace shell according to claim 1, characterized in that said water inlet conduit (110) is arranged at the bottom of said shell (100) and said water outlet conduit (120) is arranged at the top of said shell (100).

3. A furnace shell according to claim 2, wherein the pipe diameter of said water outlet conduit (120) is larger than the pipe diameter of said water inlet conduit (110).

4. A heat resistant furnace shell according to claim 3, characterized in that said water inlet conduit (110) is provided with a high pressure water pump.

5. A heat resistant furnace shell according to claim 1, characterised in that graphite plates (310) are bonded to the inner wall of the volcanic insulation layer (300) on the side facing away from the glass fibre layer (500).

6. A heat resistant furnace shell according to claim 5, characterised in that a reflective insulating film is bonded to the inner wall of the graphite sheet (310) on the side facing away from the insulating layer (300) of volcanic rock.

7. A furnace shell according to claim 1, wherein the distance between the outer end edge of said first fin (210) facing away from said inner shell (200) and said inner shell (200) is a first distance, and wherein the thickness of said water-cooled chamber (400) is more than 2 times said first distance.

8. A heat resistant furnace shell according to claim 1, characterized in that the outer wall of said shell (100) is provided with a plurality of second fins (130).

9. A furnace for continuous sintering of aluminium nitride ceramics, characterized in that it comprises a furnace shell of heat-resistant type according to any one of claims 1 to 8.

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