Vacuum cavity of ultrafast high-temperature sintering furnace

Abstract

The utility model relates to a vacuum cavity of an ultrafast high-temperature sintering furnace. A sintering cavity of a traditional sintering device has many problems of sealing, cooling, insulation and the like. The vacuum cavity comprises a sintering cavity body, a cavity body cover plate, an electrode and other parts. By arranging the cavity heat insulation interlayer, the cover plate heat insulation interlayer and the communicated water inlet and outlet, the heat insulation effect is enhanced, heat loss and related risks are reduced, and the product consistency and the equipment stability are guaranteed; the inverted L-shaped graphite electrode is matched with the heating body, so that ultrafast high-temperature sintering can be realized, and the heating efficiency is improved; an insulating sleeve, an electrode water jacket and the like guarantee insulation and safety; due to the connection design of the cavity cover plate and the sintering cavity and the observation window, the operation convenience and real-time monitoring are improved; the bottom fixing feet reinforce the equipment stability. The vacuum cavity effectively solves a series of problems of a traditional sintering cavity, and has remarkable advantages in the aspects of sealing performance, heat insulation, heating, safety, operation, equipment stability and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to high temperature sintering device technical field, especially, it relates to a kind of ultrafast high temperature sintering furnace vacuum cavity. BACKGROUND

[0002] Sintering is a crucial process in the field of material processing, aiming to transform powdered materials into dense bodies. In the sintering process of powders, metal or other powder compacts are heated to a specific temperature below the melting point of the main component. During this process, complex physical and chemical interactions occur between particles, resulting in the desired strength and unique properties of the material. This process is essential in key areas such as ceramic manufacturing, ultra-high temperature material research and development, refractory material production, and powder metallurgy. After shaping, the powder enters the sintering stage, and the resulting dense body is a polycrystalline material composed of crystals, glass bodies, and pores. The sintering process directly affects key factors such as grain size, pore size, grain boundary shape, and distribution. These microscopic structural changes deeply influence the material's properties and determine its overall performance in practical applications.

[0003] The core component of the traditional sintering device, the sintering chamber, has a series of technical problems that cannot be ignored, severely affecting the quality and efficiency of sintering operations and the operation of surrounding equipment. In terms of sealing, poor sealing performance leads to frequent gas leaks. For many sintering processes that require specific atmospheres, such as vacuum, it is difficult to precisely control the atmosphere inside the chamber due to gas leakage. At the same time, a large amount of heat escapes to the outside, wasting energy and disrupting the stable high-temperature environment, resulting in uneven sintering temperature distribution and affecting product consistency. The cooling process is also problematic, as traditional methods rely heavily on natural cooling, which is inefficient. Even with simple air cooling assistance, the cooling effect is still not ideal when dealing with large quantities or large sintered products. Not only does this prolong the production cycle and reduce efficiency, but it also highlights the uneven cooling phenomenon. This leads to the formation of hot stress concentration areas within the sintering chamber, causing the chamber structure to gradually deform and damage due to uneven thermal stress over time. Additionally, internal thermal stress in the products may exceed the bearing limit, resulting in deformation, cracking, loss of dimensional accuracy, and quality stability. There are also insulation defects in the sintering device operated by electric heating. The risk of electrical leakage increases dramatically, threatening the safety of operating personnel and interfering with the temperature measurement and control system. Noise interference leads to inaccurate measurements and unstable control, causing fluctuations in product quality. Furthermore, a large amount of heat escapes to the outside during the operation of the sintering chamber, causing accelerated aging of electronic measurement equipment components and reduced precision. The lubricating oil of mechanical equipment may deteriorate at high temperatures, leading to equipment malfunctions, reduced service life, and performance stability, and even causing safety accidents and failures such as short circuits and equipment jams. SUMMARY

[0004] Therefore, the utility model aims at providing a vacuum cavity of an ultrafast high-temperature sintering furnace to solve some or all of the problems in the background art.

[0005] To achieve the above-mentioned purposes, the technical scheme of the utility model is as follows:

[0006] A vacuum cavity of an ultrafast high-temperature sintering furnace, comprising a sintering cavity, a cavity cover plate, a graphite electrode, an electrode bolt, an insulating sleeve, a copper electrode, a copper electrode fixing nut, a graphite electrode fixing nut, a box body sealing ring, an infrared temperature measurement window, and an insulating gasket, wherein the sintering cavity is a cuboid with an upper opening, the sintering cavity is provided with the insulating sleeve on both sides, the copper electrode is arranged outside the insulating sleeve, the electrode bolt penetrates the insulating sleeve and the copper electrode to enter the inside of the cavity, the outer end of the electrode bolt is fixed by a bolt, the insulating gasket is arranged between the bolt and the electrode bolt, the electrode bolt penetrating the sintering cavity is fixed by the copper electrode fixing nut, the graphite electrode is arranged on both sides of the inside of the sintering cavity and is fixed by the graphite electrode fixing nut after penetrating the electrode bolt, the cavity cover plate is matched with the upper opening of the sintering cavity, the box body sealing ring is arranged at the matching position, and the infrared temperature measurement window is arranged at the bottom of the sintering cavity.

[0007] The sintering cavity, as the main part, is a cuboid with an upper opening, providing a space for powder sintering; the cavity cover plate is matched with the upper opening of the sintering cavity, the box body sealing ring at the matching position ensures sealing, preventing gas leakage and heat loss; the insulating sleeve is arranged on both sides of the sintering cavity, playing an insulating role; the copper electrode is located outside the insulating sleeve and is one of the electric heating components; the electrode bolt penetrates the insulating sleeve and the copper electrode to enter the inside of the cavity, and the outer end is fixed by a bolt, and the insulating gasket between the electrode bolt and the bolt ensures insulation; the electrode bolt penetrating the cavity is fixed by the copper electrode fixing nut, ensuring stable installation of the copper electrode; the graphite electrode is arranged on both sides of the inside of the sintering cavity and is fixed by the graphite electrode fixing nut after penetrating the electrode bolt, being used for cooperating to realize the heating function; the infrared temperature measurement window is arranged at the bottom of the sintering cavity, facilitating measurement and monitoring of the temperature in the sintering cavity.

[0008] The cavity heat insulation interlayer is arranged in the outer wall of the sintering cavity, and the inside of the cavity heat insulation interlayer is overall connected; the sintering cavity is provided with an air inlet and an air outlet, the air inlet is connected with an external inert gas conveying device, the air outlet is connected with an external vacuum pump, and the cover plate is provided with a cover plate heat insulation interlayer, and the inside of the cover plate heat insulation interlayer is overall connected. The cavity heat insulation interlayer arranged in the outer wall of the sintering cavity can reduce heat transfer to the external environment, help maintain a stable high-temperature environment in the sintering cavity, avoid energy waste and uneven sintering temperature distribution caused by heat loss, ensure product consistency, and also reduce the aging rate of surrounding electronic measurement equipment elements, reduce the risk of high-temperature deterioration of mechanical equipment lubricating oil, improve equipment service life and performance stability, and reduce safety accidents and failures such as line short circuit and equipment jam caused by heat dissipation; the air inlet and the air outlet are arranged to solve the problem of poor sealing of traditional sintering devices, and they are respectively connected with the external inert gas conveying device and the vacuum pump to accurately control the atmosphere in the cavity, effectively prevent gas leakage in specific atmospheres such as vacuum sintering process, and ensure that the sintering requirements are met, realizing accurate control of the internal gas environment, stabilizing the sintering environment with the cavity heat insulation interlayer, avoiding gas leakage and heat loss, and improving the quality and efficiency of sintering operation; the cover plate heat insulation interlayer and the cavity heat insulation interlayer have similar effects, focusing on reducing heat loss at the cavity cover plate, further strengthening the vacuum cavity heat insulation performance of the entire sintering furnace, and cooperating with the cavity heat insulation interlayer to maintain a high temperature in the sintering cavity, preventing a large amount of heat from escaping from the cover plate part, and ensuring the stability of the sintering process and product quality.

[0009] In a structure that can optimize the foregoing scheme, the graphite electrodes are inverted L-shaped, and the two graphite electrodes are connected by a heating body. The heating body is in the shape of a long strip and can be made of carbonaceous materials or metal tungsten, etc. It works by Joule heating and can directly contact the sintered material for efficient direct heating, enabling ultra-fast high-temperature sintering, which can reach a temperature above 3000℃ in just a few seconds. The graphite electrodes are inverted L-shaped and connected to the heating body, which aims to meet the needs of ultra-high-temperature sintering process. Its advantages are that it can provide ultra-high temperature in a very short time, promote the physical and chemical effects such as bonding between particles in the sintering process to reach the required high-temperature state quickly, greatly shorten the sintering time, improve the operation efficiency, and help obtain the final material or product with the expected strength and unique performance. Preferably, the air inlet, the air outlet, and the heating body are in the same horizontal plane, which optimizes the cooperation between the gas flow path and the heating process in the sintering cavity. During ultra-fast high-temperature sintering, the inert gas can efficiently link up with the high-temperature environment at the appropriate position, not only closely surrounding the heating body to play multiple roles such as protecting the heating body, accurately adjusting the atmosphere in the cavity, and assisting heat transfer, but also precisely controlling the atmosphere in the cavity while achieving ultra-high-temperature sintering, ensuring the normal work and service life of the heating body, and making the gas flow link and the heating link closely match and complement each other, effectively enhancing the sintering effect and ensuring product quality.

[0010] In a structure that can optimize the foregoing scheme, a refractory heat insulation layer is further included, and the refractory heat insulation layer is arranged between the graphite electrode and the abutting position of the sintering cavity. The refractory heat insulation layer is arranged mainly in view of the fact that the graphite electrode generates high temperature during work, and the abutting position of the graphite electrode and the sintering cavity is easily affected by the high temperature. Therefore, the refractory heat insulation layer is arranged to play a protective effect on the sintering cavity, effectively isolate the high temperature generated by the graphite electrode, prevent the sintering cavity from being locally overheated due to the high temperature transmission, and avoid deformation, damage and other conditions of the sintering cavity, thereby prolonging the service life of the sintering cavity and ensuring that the sintering operation can be normally and continuously carried out.

[0011] In a structure that can optimize the foregoing scheme, an electrode water jacket is further included, and the electrode water jacket is arranged between the outer side of the copper electrode and the electrode bolt. The electrode water jacket is arranged to cope with the overheating problem that the copper electrode in the sintering device operated by electric heating may face. The electrode water jacket is arranged between the outer side of the copper electrode and the electrode bolt, and can timely take away the heat generated in the working process of the copper electrode and the heat conducted from the inside of the cavity by means of the cooling effect of water, so as to maintain the copper electrode in a normal working temperature range. This not only effectively reduces the risk of electric leakage and ensures the personal safety of the operator, but also avoids the interference of the copper electrode overheating on the temperature measurement and control system, thereby ensuring the stable product quality and laying a solid foundation for the safe and orderly development of the entire sintering operation.

[0012] In a structure that can optimize the foregoing scheme, a sealing ring is further included, and the sealing ring is arranged between the copper electrode and the electrode water jacket and between the copper electrode and the insulating sleeve. The sealing ring can further improve the sealing performance of the sintering cavity. By being arranged between the copper electrode and the electrode water jacket and between the copper electrode and the insulating sleeve, the sealing performance of these key parts is effectively enhanced, and gas leakage and heat loss are effectively prevented. The sealing ring plays a crucial role in significantly improving the overall sealing level of the vacuum cavity of the sintering furnace, stabilizing the atmosphere and temperature environment in the cavity, and avoiding energy waste, atmosphere out of control and uneven temperature distribution caused by gas leakage, thereby laying a solid foundation for ensuring the high-quality and high-efficiency development of the sintering operation.

[0013] In a structure that can optimize the foregoing scheme, an observation window is further included, and the observation window is arranged on the upper part of the cavity cover plate. The observation window allows the operator to view the key conditions such as the state of the sintered material and the working condition of the heating body in the sintering cavity in real time during the sintering process, so as to timely and accurately grasp the sintering progress. In this way, once an abnormal condition occurs, the operator can quickly respond. The observation window plays a very significant role as an intuitive and effective monitoring means, allowing the operator to obtain important information in the sintering cavity without opening the cavity, effectively ensuring the smooth progress of the sintering operation and improving the controllability and safety level of the production process.

[0014] In a structure that can optimize the foregoing scheme, the cavity cover plate is hinged to one side of the sintering cavity, and butterfly nut-screw fastening type locks are arranged around the fitting part of the cavity cover plate and the sintering cavity. The cavity cover plate is hinged to one side of the sintering cavity, which is convenient for opening and closing the cavity cover plate, thereby facilitating subsequent maintenance, cleaning and loading of the sintering cavity, and at the same time, the butterfly nut-screw fastening type locks can ensure that the cavity cover plate is tightly attached to the sintering cavity in the closed state, greatly enhancing the sealing performance. Such design is quite remarkable, which not only makes daily operation more convenient, but also effectively prevents gas leakage during sintering operation, and stably maintains the atmosphere and temperature environment in the sintering cavity in a stable state, thereby laying a solid foundation for ensuring high-quality and efficient sintering operation.

[0015] In a structure that can optimize the foregoing scheme, a fixing foot is further arranged, and the bottom of the sintering cavity is provided with the fixing foot. The purpose of arranging the fixing foot is to fix the sintering cavity in the corresponding working position, effectively avoiding the displacement of the sintering cavity due to equipment vibration, external force interference and other factors during the sintering process, thereby affecting the normal development of the sintering operation. It can provide solid and stable support to ensure that the sintering cavity remains stationary during the working period, and ensure that the entire sintering process proceeds smoothly and orderly.

[0016] In a structure that can optimize the foregoing scheme, a cavity inlet and outlet water port is arranged on the sintering cavity, and the cavity inlet and outlet water port is communicated with the cavity heat insulation interlayer.

[0017] In a structure that can optimize the foregoing scheme, a cover plate inlet and outlet water port is arranged on the cavity cover plate, and the cover plate inlet and outlet water port is communicated with the cover plate heat insulation interlayer.

[0018] The cavity inlet and outlet water port is communicated with the cavity heat insulation interlayer, and the cover plate inlet and outlet water port is communicated with the cover plate heat insulation interlayer, which is to realize flexible control of the temperature in the heat insulation interlayer, such as passing cooling water as needed to enhance the heat insulation effect, or discharging hot gas in time to keep the temperature in the heat insulation interlayer in an appropriate state, thereby enhancing the heat insulation performance and better playing the heat insulation role. Based on this, the efficiency of the heat insulation interlayer can be optimized, the internal temperature can be flexibly adjusted according to the actual working condition, the heat insulation efficiency of the vacuum cavity of the sintering furnace can be improved, and the stable high-temperature environment of the sintering process can be ensured, thereby reducing the negative influence of heat loss on surrounding equipment and sintering operation.

[0019] Compared with the prior art, the ultrafast high-temperature sintering furnace vacuum cavity has the following advantages:

[0020] 1. Sealing performance improvement: By setting the box sealing ring, sealing ring, and the design of the gas inlet and outlet connected to the external inert gas conveying device and vacuum pump, effectively solve the problem of poor sealing degree of traditional devices, gas leakage frequently, precise control of the atmosphere in the cavity, avoid the loss of heat and loss of control of the atmosphere caused by gas leakage, stable sintering environment, guarantee the quality and efficiency of sintering operation.

[0021] 2. Enhanced heat insulation effect: The cavity insulation interlayer, cover plate insulation interlayer and the inlet and outlet design connected thereto reduce heat transfer to the external environment, maintain the stability of the high temperature environment in the sintering cavity, reduce the risk of surrounding equipment being affected by heat (such as electronic measurement equipment element aging, mechanical equipment lubricating oil deterioration), reduce safety accidents and failures, guarantee product consistency, improve equipment service life and performance stability, and strengthen heat insulation efficiency.

[0022] 3. Improved heating efficiency: The inverted L-shaped graphite electrode cooperates with the heating body that can achieve ultra-fast high-temperature sintering, and can reach a high temperature of more than 3000℃ within a few seconds, which can make the powder material quickly reach the required high temperature state, strongly promote the physical and chemical action, greatly shorten the sintering time, improve the operation efficiency, and help obtain high-quality final materials or products; The design of the gas inlet, gas outlet and heating body on the same horizontal plane optimizes the cooperation of gas and heating, enhances the sintering effect and guarantees product quality.

[0023] 4. Safety performance guarantee: The insulation sleeve and insulation gasket ensure insulation and reduce the risk of electric shock, protecting the personal safety of operators; The electrode water jacket carries away the heat of the copper electrode, avoiding problems such as electric shock and interference with the temperature control system caused by overheating, ensuring stable product quality and building a solid foundation for sintering operation safety.

[0024] 5. Improved operation convenience: The cavity cover plate is hinged to the sintering cavity and is equipped with a butterfly nut-screw fastening type lock, which not only facilitates daily maintenance, cleaning, loading and other operations, but also effectively prevents gas leakage during sintering, maintaining a stable atmosphere and temperature environment; The observation window facilitates real-time monitoring of the sintering process, timely response to abnormalities, and improves production controllability and safety.

[0025] 6. Equipment stability reinforcement: The bottom is provided with a fixed foot to prevent the sintering cavity from being displaced due to equipment vibration and external interference, ensuring smooth and orderly sintering process and ensuring product quality. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which form a part of this description, are included to provide a further understanding of the application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 The figure is a schematic diagram of the cross-sectional structure of the ultra-fast high-temperature sintering furnace vacuum cavity.

[0028] Figure 2 The utility model discloses a superfast high-temperature sintering furnace vacuum cavity structure schematic view.

[0029] Figure 3 The utility model discloses a superfast high-temperature sintering furnace vacuum cavity rear view.

[0030] Figure 4 The utility model discloses a superfast high-temperature sintering furnace vacuum cavity plan view.

[0031] Mark explanation:

[0032] 1, sintering cavity, 1-1, cavity heat insulation interlayer, 2, cavity cover plate, 2-1, cover plate heat insulation interlayer, 3, graphite electrode, 4, electrode bolt, 5, insulating sleeve, 6, copper electrode, 7, copper electrode fixed nut, 8, graphite electrode fixed nut, 9, box body sealing ring, 10, infrared temperature measurement window, 11, air inlet, 12, air outlet, 13, refractory insulation layer, 14, insulating gasket, 15, electrode water jacket, 16, observation window, 17, butterfly nut-screw fastening type lock catch, 18, fixed foot, 19, cavity inlet and outlet water port, 20, cover plate inlet and outlet water port, 21, sealing ring. Specific implementation

[0033] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0034] In the description of the utility model, it should be understood that the orientation or position relation indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0035] In the description of the utility model, it is necessary to explain that, unless there are definite provisions and limitations, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be fixed connection, also can be detachable connection, or integrally connected, it can be mechanical connection, also can be electrical connection, it can be direct connection, also can be indirectly connected through intermediate medium, it can be the communication inside two elements, for ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0036] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0037] 1, equipment structure

[0038] The ultrafast high-temperature sintering furnace vacuum cavity in the embodiment mainly consists of a sintering cavity body 1, a cavity cover plate 2 and other components. Among them, the sintering cavity body 1 is a cuboid with an upper opening, and the two sides are provided with an insulating sleeve 5. The external copper electrode 6 is connected to the inside of the cavity through the electrode bolt 4 penetrating the insulating sleeve 5, and the outer end of the electrode bolt 4 is fixed with a bolt, and an insulating gasket 14 is arranged between the bolt and the electrode bolt 4. The electrode bolt 4 penetrating into the cavity is fixed by the copper electrode fixing nut 7. Graphite electrodes 3 are also arranged on both sides of the cavity inside, which are fixed by graphite electrode fixing nuts 8. The cavity cover plate 2 cooperates with the upper opening of the sintering cavity body 1, and a box sealing ring 9 is arranged at the cooperation position to ensure the sealing. An infrared temperature measurement window 10 is arranged at the bottom of the sintering cavity body 1 for temperature monitoring.

[0039] A cavity heat insulation interlayer 1-1 is arranged in the outer wall of the sintering cavity body 1, and the inside is connected as a whole. The cavity cover plate 2 is also provided with a similar cover plate heat insulation interlayer 2-1 and is connected. At the same time, the sintering cavity body 1 is provided with an air inlet 11 and an air outlet 12, which are respectively connected to the external inert gas conveying device and the vacuum pump to accurately control the atmosphere in the cavity.

[0040] In addition, in order to further optimize the structure, many components are also arranged. For example, the graphite electrode 3 is inverted L-shaped, and the upper part is connected by a heating body, which can realize ultrafast high-temperature sintering. A refractory insulation layer 13 is arranged at the position where the graphite electrode 3 is attached to the sintering cavity body 1. An electrode water jacket 15 is arranged between the outer side of the copper electrode 6 and the electrode bolt 4, and sealing rings 21 are arranged between the copper electrode 6 and the electrode water jacket 15 and between the copper electrode 6 and the insulating sleeve 5. An observation window 16 is arranged on the upper part of the cavity cover plate 2. The cavity cover plate 2 is hinged to one side of the sintering cavity body 1, and a butterfly nut-screw fastening type lock 17 is arranged around the cooperation position. A fixing foot 18 is arranged at the bottom of the sintering cavity body 1. The sintering cavity body 1 is provided with a cavity water inlet and outlet 19 connected with the cavity heat insulation interlayer 1-1, and the cavity cover plate 2 is provided with a cover plate water inlet and outlet 20 connected with the cover plate heat insulation interlayer 2-1.

[0041] 2, device running process

[0042] (1) Preparation stage:

[0043] First, the sintering material is placed in the sintering cavity 1, the cavity cover plate 2 is conveniently closed through the hinge structure of the sintering cavity 1, and then the butterfly nut-screw fastening lock 17 is used to tightly fix it, ensuring good sealing and preventing gas leakage. At this time, the box sealing ring 9 and the sealing ring 21 play a key sealing role.

[0044] Next, according to the sintering process requirements, specific inert gases such as argon are introduced from the outside inert gas delivery device through the gas inlet 11, and at the same time, the external vacuum pump connected to the gas outlet 12 is started to precisely control the atmosphere in the cavity, so that it reaches the required vacuum degree or other specific atmosphere conditions, creating a suitable environment for the sintering process.

[0045] Start the water circulation system in the electrode water jacket 15 to ensure that it can timely remove the heat generated by the copper electrode 6 during subsequent work, maintain the copper electrode 6 within the normal working temperature range, and ensure the safety and normal operation of the equipment.

[0046] (2) Heating and sintering stage:

[0047] Turn on the power, the current is conducted to the graphite electrode 3 through the copper electrode 6 and the electrode bolt 4. Since the graphite electrode 3 is inverted L-shaped and the upper part is connected by a heating element, the heating element is made of materials that can achieve ultra-fast high-temperature sintering, such as carbon materials or metallic tungsten, and through Joule heating, the heating element directly contacts the sintering material for efficient direct heating, reaching a temperature above 3000°C within a few seconds. During the heating process, the design of the gas inlet 11 and the gas outlet 12 and the heating element at the same level enables the inert gas to efficiently link with the high-temperature environment at the appropriate position, tightly surrounding the heating element, playing multiple roles such as protecting the heating element, precisely adjusting the atmosphere in the cavity, and assisting heat transfer. It also ensures the normal operation and service life of the heating element, allowing the gas flow link and the heating link to closely match, enhancing the sintering effect.

[0048] As the temperature rises, the particles between the material gradually change into a dense body through complex physical and chemical interactions such as bonding at a specific temperature below the melting point of the main components. In this process, the infrared temperature measurement window 10 monitors the temperature in the sintering cavity in real time, allowing the operator to make necessary adjustments based on the temperature to ensure that the sintering process proceeds as expected.

[0049] Meanwhile, the cavity thermal insulation interlayer 1-1 and the cover plate thermal insulation interlayer 2-1 effectively reduce the heat transfer to the external environment, maintain the high-temperature environment in the sintering cavity stable, avoid the energy waste and the uneven sintering temperature distribution caused by heat loss, ensure the product consistency, and reduce the aging speed of the surrounding electronic measurement equipment elements, reduce the risk of high-temperature metamorphism of the lubricating oil of the mechanical equipment, and improve the service life and performance stability of the equipment. The refractory insulation layer 13 effectively isolates the high temperature generated by the graphite electrode 3, prevents the sintering cavity 1 from being locally overheated due to high temperature transmission, avoids deformation, damage and other conditions, and prolongs the service life of the sintering cavity 1.

[0050] (3) Cooling stage:

[0051] When the sintering process is completed, stop heating, at this time, cooling water can be introduced into the cavity thermal insulation interlayer 1-1 through the cavity inlet and outlet water port 19, or cooling water can be introduced into the cover plate thermal insulation interlayer 2-1 through the cover plate inlet and outlet water port 20, to accelerate the heat dissipation process and further strengthen the heat insulation effect, quickly reduce the temperature of the sintering cavity 1 and the cavity cover plate 2.

[0052] Meanwhile, natural cooling is also being carried out, and since the heat exchange between the inside and outside of the cavity is effectively controlled during the previous heating process, the cooling is more uniform and efficient than traditional equipment, avoiding the problem of heat stress concentration caused by uneven cooling, preventing the sintered product from deforming, cracking, losing dimensional accuracy and quality stability, and other conditions.

[0053] (4) Subsequent operation stage:

[0054] After cooling to a certain extent, loosen the butterfly nut-screw fastening lock 17, and conveniently open the cavity cover plate 2 through the hinged structure. The operator can observe the situation in the sintering cavity through the observation window 16 in advance, so as to more targetedly carry out subsequent processing on the sintered product, such as taking out the product, checking the quality, etc.

[0055] During the whole process, the fixing foot 18 always ensures that the sintering cavity 1 is fixed in the corresponding working position, avoids displacement of the sintering cavity 1 caused by equipment vibration, external force interference and other factors, ensures that the whole sintering process is stable and orderly, and ensures the product quality.

[0056] Through the above embodiment, the specific situation of the vacuum cavity of the ultrafast high-temperature sintering furnace in the structure design and actual operation process is displayed, and many problems existing in the traditional sintering device are effectively solved, and efficient, stable and safe sintering operation is realized.

[0057] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An ultrafast high-temperature sintering furnace vacuum chamber, characterized in that: The utility model provides a sintering chamber (1), cavity cover plate (2), graphite electrode (3), electrode bolt (4), insulating sleeve (5), copper electrode (6), copper electrode fixed nut (7), graphite electrode fixed nut (8), box body sealing ring (9), infrared temperature measurement window (10), insulating gasket (14), sintering chamber (1) is the upper opening cuboid, and the both sides of sintering chamber (1) are provided with insulating sleeve (5), and the outside of insulating sleeve (5) is provided with copper electrode (6), and electrode bolt (4) passes through insulating sleeve (5) and enters the inside of cavity with copper electrode (6), and the outer end of electrode bolt (4) is fixed through bolt, and insulating gasket (14) is arranged between bolt and electrode bolt (4), and electrode bolt (4) that enters sintering chamber (1) is fixed through copper electrode fixed nut (7), and graphite electrode (3) is arranged at the both sides in the inside of sintering chamber (1) respectively, passes through electrode bolt (4) and is fixed through graphite electrode fixed nut (8), and cavity cover plate (2) is matched with the upper opening of sintering chamber (1), and box body sealing ring (9) is arranged at the matched place, and infrared temperature measurement window (10) is arranged at the bottom of sintering chamber (1); The outer wall of the sintering chamber (1) is provided with a cavity heat insulation interlayer (1-1), and the sintering chamber (1) is provided with an air inlet (11) and an air outlet (12) on the top, and the cavity cover plate (2) is provided with a cover plate heat insulation interlayer (2-1) inside.

2. The ultrafast sintering furnace vacuum chamber of claim 1, wherein: The graphite electrode (3) is in inverted L shape, and the two graphite electrodes (3) are connected by a heating element between the upper parts.

3. The ultrafast sintering furnace vacuum chamber of claim 1, wherein: It also includes a refractory insulation layer (13), which is arranged between the position where the graphite electrode (3) is attached to the sintering chamber (1).

4. The ultrafast sintering furnace vacuum chamber of claim 1, wherein: It also includes an electrode water jacket (15), which is arranged between the outside of the copper electrode (6) and the electrode bolt (4).

5. The ultrafast sintering furnace vacuum chamber of claim 4, wherein: It also includes a sealing ring (21), which is arranged between the copper electrode (6) and the electrode water jacket (15), and between the copper electrode (6) and the insulating sleeve (5).

6. The ultrafast sintering furnace vacuum chamber of claim 1, wherein: It also includes an observation window (16), which is arranged on the top of the cavity cover plate (2).

7. The ultrafast sintering furnace vacuum chamber of claim 1, wherein: The cavity cover plate (2) is hinged to one side of the sintering chamber (1), and butterfly nut-screw fastening type locks (17) are arranged around the matched place of the cavity cover plate (2) and the sintering chamber (1).

8. The ultrafast sintering furnace vacuum chamber of claim 1, wherein: It also includes a fixing foot (18), which is arranged at the bottom of the sintering chamber (1).

9. The ultrafast sintering furnace vacuum chamber of claim 1, wherein: The sintering chamber (1) is provided with a cavity water inlet and outlet (19), which is communicated with the cavity heat insulation interlayer (1-1).

10. The ultrafast sintering furnace vacuum chamber of claim 1, wherein: The cavity cover plate (2) is provided with a cover plate water inlet and outlet (20), which is communicated with the cover plate heat insulation interlayer (2-1).

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