A graphite high-temperature sintering furnace with rapid cooling

Abstract

This utility model discloses a high-temperature graphite sintering furnace with rapid cooling, comprising a sintering furnace body, a jacketed flow channel, a drainage component, and a heat exchange component. The sintering furnace body has a double-layer structure, with the inner layer forming a sintering cavity and the outer layer forming a surrounding jacketed flow channel. The drainage component, through a sealed cavity structure formed by the meshing of the inner and outer rotors, can extract air from the jacketed flow channel during the heating stage, forming a vacuum insulation layer and effectively reducing heat loss. During the cooling stage, the coolant circulates into the jacketed flow channel through the drainage component and achieves rapid cooling through the heat exchange component, thereby ensuring sufficient heat exchange between the inner wall of the sintering furnace and the coolant, accelerating the release of residual heat from the furnace body. This structure ensures uniform heating of graphite products during the heating stage, improving the stability of the sintering process, and significantly shortens the cooling time during the cooling stage, increasing production efficiency and achieving energy-saving and high-efficiency operation of the sintering process.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature sintering furnace technology, specifically a high-temperature graphite sintering furnace with rapid cooling. Background Technology

[0002] Currently, high-temperature graphite sintering furnaces are widely used in the sintering and forming of graphite materials and related high-temperature processed products. Existing graphite sintering furnaces mostly employ electric heating or induction heating to raise the furnace body temperature, achieving densification and microstructure optimization of the products under high-temperature conditions. During heating, the furnace body typically uses insulation layers or insulating bricks to reduce heat loss and ensure temperature stability within the furnace. However, because traditional insulation structures rely on fixed insulation materials, their insulation effect is easily affected by material thickness, thermal conductivity, and assembly sealing, making it difficult to form a stable high-vacuum insulation layer. This results in high furnace energy consumption, uneven temperature distribution, and can easily affect the sintering quality of graphite products.

[0003] During the cooling stage, traditional sintering furnaces typically employ natural cooling or external cooling water jackets for temperature reduction. Natural cooling is inefficient and has a long cooling cycle, often requiring several hours or even longer, severely impacting production efficiency. While water jacket cooling can shorten the cooling time, the limited heat exchange area of ​​the cooling water during circulation and the long heat transfer path mean that the cooling rate still cannot meet the process requirements for rapid cooling. Furthermore, some cooling systems rely solely on direct-flow coolant circulation, lacking effective pumping and circulation drive structures, which can easily lead to problems such as poor coolant flow or insufficient heat exchange efficiency, thus failing to achieve efficient furnace cooling.

[0004] In summary, existing graphite sintering furnaces generally suffer from problems such as insufficient thermal insulation, high energy consumption during heating, excessively long cooling cycles, and low cooling efficiency. There is an urgent need for a new type of high-temperature graphite sintering furnace structure that can achieve high-vacuum thermal insulation during the heating stage and achieve rapid cooling during the cooling stage through the cooperation of efficient circulating coolant and heat exchange components, in order to improve sintering quality and production efficiency. Utility Model Content

[0005] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted by this utility model is as follows: a rapid cooling high-temperature graphite sintering furnace, comprising a sintering furnace body, a jacketed flow channel, a drainage component, and a heat exchange component. By setting a jacketed flow channel on the outer wall of the sintering furnace body, and cooperating with the drainage component to form a vacuum insulation layer during the heating stage, and introducing coolant during the cooling stage to work synergistically with the heat exchange component, rapid cooling of the furnace body is achieved. This utility model has a reasonable overall structure, reliable operation, and can effectively shorten the sintering process cycle and improve temperature control accuracy.

[0007] In a preferred embodiment, the sintering furnace body of this invention has a double-layer structure. The inner layer forms a sintering cavity for placing graphite products, and the outer layer and the inner layer form a surrounding interlayer flow channel. During the heating stage, the interlayer flow channel can be pumped out by a drainage component, creating a vacuum insulation effect within the channel and reducing heat loss. During the cooling stage, coolant is injected into the interlayer flow channel, and under circulating drive, it achieves efficient heat exchange with the inner wall of the furnace, achieving rapid cooling. This design ensures that the graphite products obtain a stable and uniform temperature field distribution during sintering, thereby improving the sintering quality.

[0008] In a preferred embodiment, the drainage assembly includes a rotating box, a main shaft, an inner rotor, and an outer rotor. The main shaft is disposed inside the rotating box and drives the inner rotor to rotate eccentrically. The inner rotor and the outer rotor mesh to form several crescent-shaped sealing cavities. Coolant enters the sealing cavities through the inlet, is transported during the rotation process, and is discharged through the outlet, thereby realizing the extraction and circulation of coolant. This structure not only enables vacuum extraction of air and coolant within the jacketed flow channel during the heating stage but also drives the coolant to form a stable circulation during the cooling stage, improving heat exchange efficiency.

[0009] In a preferred embodiment, the heat exchange component includes a cooling coil disposed at the junction of the interlayer flow channels. During circulation, the coolant contacts the cooling coil for heat exchange, enabling a rapid decrease in liquid temperature within a short time. The cooled coolant, flowing within the interlayer flow channels, makes full contact with the inner wall of the sintering furnace, quickly carrying away residual heat and effectively shortening the furnace cooling time. Through the design of the aforementioned heat exchange structure, this invention can quickly enter the cooling phase after the high-temperature sintering process, avoiding thermal stress or structural defects in the workpiece caused by prolonged exposure to high temperatures.

[0010] In a preferred embodiment, the present invention is further configured such that the cross-section of the interlayer flow channel is an annular channel, uniformly arranged along the circumference of the sintering furnace body, to ensure that the coolant can flow evenly across the entire furnace body surface and avoid local temperature differences. This arrangement effectively improves the heat transfer uniformity of the furnace body surface, thereby ensuring a more stable temperature field distribution for the graphite products during the cooling process.

[0011] In a preferred embodiment, the present invention can be further configured such that the drainage component is electrically connected to the control system, and can automatically switch the operating modes of the heating and cooling stages according to the furnace temperature feedback from the temperature sensor, thereby achieving intelligent temperature control management. This not only reduces manual intervention but also improves the automation level and operating efficiency of the entire sintering process.

[0012] Specifically, this invention improves the temperature control performance and process efficiency of graphite sintering furnaces by setting a jacketed flow channel on the outer wall of the sintering furnace and combining it with the vacuum extraction and cooling liquid circulation structure of the drainage component. This results in a stable vacuum insulation effect during the heating stage and rapid circulation and heat exchange of the cooling liquid during the cooling stage.

[0013] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, by setting a jacketed flow channel in the sintering furnace body and cooperating with the exhaust structure of the exhaust component, the jacketed flow channel forms a vacuum insulation layer during the heating stage, which effectively reduces the heat loss to the outside and ensures that the graphite products can be uniformly heated in a stable high-temperature environment, thereby improving the sintering quality and process stability.

[0014] 2. In this invention, the drainage assembly adopts a sealed cavity structure formed by the meshing of the inner and outer rotors, which can maintain a high efficiency of fluid transport during vacuum pumping and coolant circulation. During the cooling stage, the coolant is rapidly cooled by the heat exchange assembly and fully exchanges heat with the inner wall of the sintering furnace during circulation, thereby significantly shortening the cooling time, achieving rapid cooling of the sintering furnace, and improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a partial cross-sectional structural diagram of a sintering furnace body according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the installation structure of the drainage component and manifold according to one embodiment of the present invention; Figure 4 This is an exploded structural diagram of the drainage component according to an embodiment of the present invention.

[0016] Figure label: 100. Sintering furnace body; 110. Connecting port; 120. Drain pipe; 130. Jacketed flow channel; 200. Drainage assembly; 210. Rotary box; 220. Main shaft; 230. Outer rotor; 240. Inner rotor; 211. Inlet; 212. Outlet; 300. Manifold; 400. Heat exchange components. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0018] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0019] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a rapid cooling high-temperature graphite sintering furnace.

[0020] Combination Figures 1-4 As shown, the present invention provides a rapid cooling graphite high-temperature sintering furnace, including a sintering furnace body 100, an exhaust assembly 200, a manifold 300, and a heat exchange assembly 400.

[0021] The sintering furnace body 100 is a closed cavity structure, with a sintering chamber inside for placing graphite products. A double-layered flow channel 130 is formed between the inner and outer walls of the sintering furnace body 100. The double-layered flow channel 130 surrounds the sintering chamber and is used to contain coolant and exchange heat with the inner wall of the furnace body, thereby rapidly removing residual heat during the cooling stage and achieving rapid cooling of the furnace body.

[0022] The drainage assembly 200 is fixedly installed on one side of the sintering furnace body 100 and includes a rotating box 210, an inlet 211, an outlet 212, an outer rotor 230, an inner rotor 240, and a main shaft 220 meshing with them. The inner rotor 240 is driven by the main shaft 220 to achieve eccentric rotation and meshes with the outer rotor 230 to form several crescent-shaped sealed cavities. During rotation, it draws in coolant through the inlet 211 and discharges it through the outlet 212 under compression, thus realizing the suction and circulation of coolant. This structure allows for the venting of coolant and air from the jacketed flow channel 130 during the heating stage to form a high-vacuum insulation layer, and also enables the coolant to recirculate during the cooling stage.

[0023] The manifold 300 is connected to the drain assembly 200 and is used to collect the discharged coolant for centralized discharge or recirculation. This structure enables the transfer of coolant between the furnace body and the external cooling circulation system, ensuring the continuity of the cooling process and the effectiveness of recycling.

[0024] The heat exchange component 400 is disposed between the manifold 300 and the interlayer flow channel 130, and has a cooling coil inside. Driven by the drainage component 200, the coolant flows through the heat exchange component 400, exchanges heat with the cooling coil, and rapidly reduces the temperature of the coolant. Then, it enters the interlayer flow channel 130 to transfer heat to the inner wall of the furnace, thereby achieving rapid cooling of the furnace body.

[0025] In this embodiment, the inlet 211 and outlet 212 are located on the surface of the rotating box 210 and are connected to the drain pipe 120 and the manifold 300, respectively, to ensure that the coolant forms a stable intake and discharge path inside the drainage assembly 200 and improve cooling efficiency.

[0026] In this embodiment, the inner rotor 240 and the outer rotor 230 adopt a cycloidal gear pump structure, which can form multiple sealed cavities during rotation, ensuring stable intake and discharge of coolant in a high vacuum environment, and improving the reliability of drainage and evacuation.

[0027] In this embodiment, the usage process of this utility model includes a heating stage and a cooling stage: During the heating stage, the jacketed flow channel 130 is first evacuated by the drainage component 200 to remove air and coolant, forming a high-vacuum insulation layer. Then, the graphite product is heated by the heating device inside the furnace to reach the required sintering temperature. During the cooling stage, coolant is reinjected into the jacketed flow channel 130. Driven by the drainage component 200, the coolant circulates and its temperature decreases as it flows through the heat exchange component 400. It then exchanges heat with the inner wall of the furnace, rapidly removing residual heat and achieving efficient cooling of the furnace.

[0028] In summary, this utility model, by setting up the drainage component 200, the jacketed flow channel 130, the heat exchange component 400 and the manifold 300, ensures the furnace body heating efficiency by utilizing the vacuum insulation effect during the heating stage, and realizes the circulation of coolant and efficient heat exchange during the cooling stage, thereby achieving the purpose of rapid cooling and significantly improving the temperature control efficiency and process stability of the sintering furnace.

[0029] Working principle and usage process of this utility model: The graphite high-temperature sintering furnace of this invention with rapid cooling mainly includes two stages in use: heating stage and cooling stage.

[0030] During the heating stage, initially, the drainage assembly 200 begins operation. The main shaft 220 inside the rotating box 210 drives the inner rotor 240 to rotate eccentrically and mesh with the outer rotor 230 to form several crescent-shaped sealed cavities. Coolant is drawn into the sealed cavities through the inlet 211, transported during rotation, and expelled through the outlet 212. The cavity inside the sintering furnace body 100 used to hold the graphite products is heated by electric heating or an external heating device. The heated heat is evenly transferred to the workpiece to be sintered through the inner wall of the furnace body, allowing the graphite products to reach the required sintering temperature. During this process, the interlayer flow channel 130 is in a high vacuum state; that is, after the drainage assembly 200 operates, the coolant and air inside the interlayer flow channel 130 are discharged, forming a vacuum insulation effect.

[0031] After the sintering process is completed, the cooling stage begins. Coolant is refilled into the jacketed flow channel 130. The coolant in the jacketed flow channel 130 comes into contact with the cooling coil inside the heat exchange component 400 to exchange heat, thereby reducing the temperature of the coolant. When flowing through the jacketed flow channel 130, it forms an efficient heat transfer with the inner wall of the sintering furnace body 100, quickly removing the residual heat of the furnace body and achieving rapid cooling.

[0032] In summary, this invention achieves high-temperature sintering of graphite products through a sealed furnace during the heating stage, and achieves rapid cooling through a drainage component driving the circulation of coolant and a vacuum extraction combined with a heat exchange component during the cooling stage, effectively shortening the sintering process cycle and improving the temperature control efficiency of the furnace.

[0033] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rapid cooling high-temperature graphite sintering furnace, characterized in that, It includes a sintering furnace body (100), a drainage assembly (200), a manifold (300), and a heat exchange assembly (400). The inner wall of the sintering furnace body (100) is provided with a jacketed flow channel (130). Both the upper and lower ends of the sintering furnace body (100) are provided with a connecting port (110). The connecting port (110) is connected to the heat exchange component (400) and the drain pipe (120) respectively. Cooling liquid is added into the jacketed flow channel (130) and the cooling liquid is in contact with the cooling coil in the heat exchange component (400) for rapid cooling of the sintering furnace body (100) during the cooling stage. The drainage assembly (200) is installed at both ends of the drain pipe (120). The drainage assembly (200) is connected to the manifold (300). When the drainage assembly (200) is working, it drives the coolant to flow and realizes the vacuum operation, so that a vacuum layer is formed inside the jacketed flow channel (130), the heat exchange assembly (400) and the drain pipe (120) to reduce the heat dissipation of the sintering furnace body (100).

2. The graphite high-temperature sintering furnace with rapid cooling according to claim 1, characterized in that, The drainage assembly (200) includes a rotating box (210), a main shaft (220), an outer rotor (230), and an inner rotor (240). The rotating box (210) is provided with an inlet (211) and an outlet (212). The main shaft (220) passes through the rotating box (210) and is connected to a motor. The inner rotor (240) is sleeved on the main shaft (220) and rotates accordingly.

3. The graphite high-temperature sintering furnace with rapid cooling according to claim 2, characterized in that, The inner rotor (240) and the main shaft (220) are offset from the axis of the rotating box (210). The outer rotor (230) is an internal gear ring structure with a cycloidal tooth surface on its inner wall. The cycloidal tooth surface meshes with the outer tooth on the inner rotor (240). The inner rotor (240) is a multi-gear body with fewer teeth on its outer circumference than the outer rotor (230). It is fixedly connected to the main shaft (220) and forms an eccentric motion during rotation. The outer rotor (230) and the inner rotor (240) form several crescent-shaped sealing cavities during meshing. The crescent-shaped sealing cavities realize the intake, transport and expulsion of coolant during rotation.

4. The graphite high-temperature sintering furnace with rapid cooling according to claim 1, characterized in that, The interlayer flow channel (130) adopts a ring-shaped arrangement structure, extends continuously along the circumference of the sintering furnace body (100), and is in close contact with the cooling coil in the heat exchange component (400).

5. The graphite high-temperature sintering furnace with rapid cooling according to claim 1, characterized in that, The heat exchange component (400) is disposed on the upper part of the sintering furnace body (100). The heat exchange component (400) is connected to an external refrigeration device and is used to exchange heat for the coolant inside the jacketed flow channel (130).

6. The graphite high-temperature sintering furnace with rapid cooling according to claim 1, characterized in that, The manifold (300) is located at the bottom end of the drain pipe (120) and is used to collect and centrally discharge the coolant from the interlayer flow channel (130) and the drain assembly (200).

7. The graphite high-temperature sintering furnace with rapid cooling according to claim 2, characterized in that, The main shaft (220) is supported on the inner wall of the rotating box (210) by a bearing structure to ensure rotational stability and to prevent coolant leakage by a seal.

8. The graphite high-temperature sintering furnace with rapid cooling according to claim 1, characterized in that, The interlayer flow channel (130), heat exchange component (400) and drain pipe (120) are all connected to the drain component (200). A vacuum insulation layer is formed inside the sintering furnace body (100) by vacuuming to reduce the heat diffusion of the sintering furnace body (100).

Images