Quick-connection preheating type graphite box air intake and exhaust structure for high-temperature sintering furnace

Abstract

The utility model discloses a quick-connection preheating type graphite box air intake and exhaust structure for a high-temperature sintering furnace, which comprises an empty hearth, a sintering graphite box is arranged in the vacuum hearth, air intake cylinders are arranged on the left side and the right side of the lower surface of the sintering graphite box, and the output ends of the air intake cylinders are fixedly connected with common air pipes. A second graphite gas pipe is fixedly connected to the upper surface of the common gas pipe, a plurality of distribution discs are arranged in the second graphite gas pipe, a quick-release connector is fixedly connected to the upper surface of the second graphite gas pipe, and the upper surface of the quick-release connector is fixedly connected with the sintering graphite box. The gas can be uniformly dispersed in the second graphite gas pipe through the uniform distribution holes of the distribution disc, and each part of the gas can be in full contact with the high-temperature graphite pipe wall in the preheating process, so that the temperature of the gas entering the sintering graphite box is more uniform, and the sintering effect is further improved.

Description

Quick-connect preheating graphite box air intake and exhaust structure for high-temperature sintering furnace Technical Field

[0001] This utility model relates to the field of high-temperature sintering furnace technology, and in particular to the quick-connect preheating graphite box inlet and outlet structure for high-temperature sintering furnaces. Background Technology

[0002] With the development of computer and automation control technology, the automation level of high-temperature vacuum sintering furnaces has improved, enabling precise control of parameters, achieving automation and intelligence, improving production efficiency and product quality stability, and reducing the impact of human factors.

[0003] During the operation of the quick-connect preheating graphite box in the high-temperature sintering furnace, the gas is prone to uneven dispersion, which leads to different flow paths and residence times in the pipeline, ultimately resulting in uneven overall gas temperature. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-connect preheating graphite box inlet and outlet structure for a high-temperature sintering furnace. The gas can be evenly dispersed in the second graphite gas pipe through the uniform distribution holes of the distribution plate. During the preheating process, all parts of the gas can fully contact the high-temperature graphite tube wall, thereby ensuring that the gas temperature entering the sintering graphite box is more uniform and further improving the sintering effect.

[0005] To achieve the above objectives, a quick-connect preheating graphite box inlet and outlet structure for a high-temperature sintering furnace is provided, comprising: a vacuum furnace chamber, inside which a sintering graphite box is disposed; air inlet cylinders are disposed on both the left and right sides of the lower surface of the sintering graphite box; the output end of each air inlet cylinder is fixedly connected to a conventional gas pipe; a second graphite gas pipe is fixedly connected to the upper surface of the conventional gas pipe; the second graphite gas pipe contains several distribution plates; and a quick-release connector is fixedly connected to the upper surface of the second graphite gas pipe, with the upper surface of the quick-release connector fixedly connected to the sintering graphite box. This structure establishes a complete air inlet passage, the distribution plates preheat the gas, and the quick-release connector facilitates maintenance and improves sintering efficiency.

[0006] According to the quick-connect preheating graphite box inlet and outlet structure for the high-temperature sintering furnace, the inlet cylinder is fixedly connected to the lower surface of the vacuum furnace chamber, and several ventilation holes are evenly distributed inside the distribution plate, which is made of graphite plate. The inlet cylinder is fixed and stable, and the graphite distribution plate provides flow obstruction and preheating, ensuring uniform and efficient gas input.

[0007] According to the quick-connect preheating graphite box inlet and outlet structure for the high-temperature sintering furnace, two concave air outlets are provided on the upper part of the inner surface of the sintering graphite box, and the two concave air outlets are symmetrically arranged inside the sintering graphite box. The symmetrical concave air outlet design guides the exhaust gas to be discharged in an orderly manner, ensuring uniform airflow distribution inside the box.

[0008] According to the quick-connect preheating graphite box inlet and outlet structure for the high-temperature sintering furnace, exhaust cylinders are fixedly connected to both the left and right sides of the upper surface of the vacuum furnace chamber, and the input end of each exhaust cylinder is fixedly connected to a first graphite gas pipe. The dual exhaust cylinders and graphite gas pipes work together to effectively discharge waste gas and maintain a stable sintering environment.

[0009] According to the quick-connect preheating graphite box inlet and outlet structure for the high-temperature sintering furnace, the first graphite gas pipe extends into the sintering graphite box, and the first graphite gas pipe abuts against the inner wall of the concave outlet. The tight contact between the graphite gas pipe and the outlet ensures exhaust sealing, improving the efficiency and quality of exhaust gas discharge.

[0010] The above-mentioned solution has the following beneficial effects:

[0011] This invention includes an intake cylinder, a regular gas pipe, a second graphite gas pipe, a distribution plate, and a quick-release connector. The gas is evenly dispersed in the second graphite gas pipe through the uniform distribution holes of the distribution plate. During the preheating process, all parts of the gas can fully contact the high-temperature graphite pipe wall, thereby ensuring a more uniform gas temperature entering the sintering graphite box and further improving the sintering effect.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1 is a perspective view of the quick-connect preheating graphite box air intake and exhaust structure for the high-temperature sintering furnace of this utility model.

[0015] Figure 2 is a front view of the quick-connect preheating graphite box inlet and outlet structure for the high-temperature sintering furnace of this utility model.

[0016] Figure 3 is a cross-sectional perspective view of the quick-connect preheating graphite box air intake and exhaust structure for the high-temperature sintering furnace of this utility model.

[0017] Figure 4 is an enlarged view of the structure at point A in Figure 3 of the utility model.

[0018] Legend:

[0019] 1. Vacuum furnace chamber; 2. Sintering graphite box; 3. First graphite gas pipe; 4. Exhaust cylinder; 5. Intake cylinder; 6. Ordinary gas pipe; 7. Second graphite gas pipe; 8. Distribution plate; 9. Quick-release connector; 10. Recessed gas outlet. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] Referring to Figures 1-4, the quick-connect preheating graphite box air intake and exhaust structure for a high-temperature sintering furnace according to this embodiment of the present invention includes: a vacuum furnace chamber 1, inside which a sintering graphite box 2 is installed. The sintering graphite box 2 serves as the core supporting component, providing a closed high-temperature space for material sintering, and together with the vacuum furnace chamber 1, constructing a sealed sintering environment. Air intake cylinders 5 are installed on both the left and right sides of the lower surface of the sintering graphite box 2. The air intake cylinders 5 are mechanically driven to control the opening, closing, or switching of the air intake path. Their installation position ensures that the airflow is evenly introduced from both sides of the bottom of the sintering graphite box 2. A common gas pipe 6 is fixedly connected to the output end of the air intake cylinder 5. The common gas pipe 6 serves as the connecting carrier between the air intake cylinder 5 and the graphite gas pipe, transmitting gas to the subsequent preheating structure, realizing the initial connection of the gas path. A second graphite gas pipe 7 is fixedly connected to the upper surface of 6. The second graphite gas pipe 7 is made of high-temperature resistant graphite material and receives the gas input from the ordinary gas pipe 6. It provides a high-temperature resistant transmission channel for the preheating function of the subsequent distribution plate 8. Several distribution plates 8 are set inside the second graphite gas pipe 7. The distribution plates 8 (graphite plate material) are installed inside the second graphite gas pipe 7. The airflow is initially divided through the air holes distributed on its surface. In conjunction with the gas pipe structure, the gas is guided to flow towards the sintered graphite box 2. A quick-release connector 9 is fixedly connected to the upper surface of the second graphite gas pipe 7. The upper surface of the quick-release connector 9 is fixedly connected to the sintered graphite box 2. The quick-release connector 9 realizes a quick and sealed connection between the second graphite gas pipe 7 and the sintered graphite box 2, which is convenient for equipment maintenance and disassembly, while ensuring the airtightness of the air intake path.

[0022] The intake cylinder 5 is fixedly connected to the lower surface of the vacuum furnace 1. The fixed installation of the intake cylinder 5 with the vacuum furnace 1 ensures the structural stability of the intake mechanism under gas pressure, preventing displacement from affecting gas flow. The distribution plate 8 has several evenly distributed ventilation holes inside, and its material is graphite plate. The graphite plate material of the distribution plate 8 meets the stability requirements under high-temperature environments. Its evenly distributed ventilation holes can obstruct and slow down the gas entering the second graphite gas pipe 7, extending the gas's residence time in the pipe. Preheating of the gas is achieved through heat conduction from the graphite plate, while simultaneously increasing the heat exchange area between the gas and the graphite pipe wall, thus improving preheating efficiency. Two concave exhaust ports 10 are provided on the upper part of the inner surface of the sintering graphite box 2, and these two concave exhaust ports 10 are symmetrically arranged inside the sintering graphite box 2. The symmetrically arranged concave exhaust ports 10 provide a balanced discharge path for the sintered exhaust gas. The concave structure can guide... The airflow is concentrated and directed towards the exhaust mechanism to prevent disorderly stagnation of airflow within the chamber. Exhaust cylinders 4 are fixedly connected to both sides of the upper surface of the vacuum furnace 1. The exhaust cylinders 4, through their fixed connection with the vacuum furnace 1, provide mechanical drive support for the exhaust path. Their symmetrical layout ensures that the exhaust gas is discharged synchronously from both sides of the upper part of the sintering graphite box 2. The input end of the exhaust cylinder 4 is fixedly connected to a first graphite gas pipe 3. The first graphite gas pipe 3 is made of high-temperature resistant graphite material and connects the exhaust cylinder 4 to the concave outlet 10 of the sintering graphite box 2, forming a high-temperature resistant exhaust gas discharge channel. The first graphite gas pipe 3 extends into the sintering graphite box 2, and the first graphite gas pipe 3 abuts against the inner wall of the concave outlet 10. The first graphite gas pipe 3 penetrates deep into the interior of the sintering graphite box 2 and abuts against the inner wall of the concave outlet 10, ensuring that the path of exhaust gas from the concave outlet 10 to the exhaust cylinder 4 is sealed and unobstructed, preventing gas leakage from affecting the vacuum environment or the sintering process.

[0023] Working principle: First, the sintered graphite box 2 is fixed inside the vacuum furnace 1. The second graphite gas pipe 7 is sealed to the bottom of the sintered graphite box 2 through the quick-release connector 9 to ensure quick installation and airtightness of the air intake path. At the same time, the first graphite gas pipe 3 is extended to the recessed air outlet 10 inside the sintered graphite box 2, so that its inner wall abuts against the gas pipe to form a sealed exhaust channel. The air intake cylinder 5 and the exhaust cylinder 4 are fixed to the lower and upper surfaces of the vacuum furnace 1, respectively. The air intake cylinder 5 and the second graphite gas pipe 7 are connected through a common gas pipe 6 to form a complete air intake drive chain. The first graphite gas pipe 3 is directly connected to the input end of the exhaust cylinder 4, establishing an exhaust drive path. This activates the intake cylinder 5, which pushes the ordinary gas pipe 6 through its output end to open the intake path. Gas enters the second graphite gas pipe 7 through the ordinary gas pipe 6. As the gas flows through the distribution plate 8 (made of graphite plate with uniformly spaced vents) in the second graphite gas pipe 7, the distribution plate 8 obstructs and slows the gas flow through the vents, extending the gas's residence time within the high-temperature graphite gas pipe. Simultaneously, the heat conduction effect of the graphite plate allows for sufficient heat exchange between the gas and the pipe wall, achieving a preheating effect and increasing heat transfer. To improve efficiency and stability of the sintering process, preheated gas enters the sintering graphite box 2 via quick-release connector 9, providing the necessary atmosphere for material sintering. The vacuum furnace 1 maintains a high-temperature vacuum environment inside. The sintering graphite box 2 serves as the main support, ensuring that the material completes the high-temperature sintering reaction within the enclosed space. The air intake cylinder 5 can adjust the air intake volume or switch the gas type according to process requirements. The exhaust gas generated during sintering rises to the symmetrical concave exhaust port 10 on the upper part of the inner surface of the sintering graphite box 2. The concave structure guides the exhaust gas to flow into the first graphite gas pipe 3, activating the exhaust cylinder 4. Waste gas is drawn into the exhaust cylinder 4 through the first graphite gas pipe 3 via negative pressure or mechanical drive, and finally discharged to the external treatment system. The symmetrically arranged exhaust cylinder 4 ensures uniform discharge of waste gas and avoids airflow stagnation in the chamber. After sintering, the inlet cylinder 5 and the exhaust cylinder 4 are closed to cut off the gas path drive. The connection between the second graphite gas pipe 7 and the sintering graphite box 2 is quickly disassembled through the quick-release connector 9, which facilitates the inspection, cleaning or replacement of components such as the distribution plate 8 and graphite gas pipes. After maintenance, the connection is reset through the quick-release connector 9 to ensure the sealing for the next use.

[0024] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A quick-connect preheating graphite box inlet and outlet structure for a high-temperature sintering furnace, including: A vacuum furnace (1) is provided with a sintered graphite box (2) inside the vacuum furnace (1). The sintered graphite box (2) is characterized in that: an air inlet cylinder (5) is provided on both the left and right sides of the lower surface of the sintered graphite box (2). The output end of the air inlet cylinder (5) is fixedly connected to a common gas pipe (6). The upper surface of the common gas pipe (6) is fixedly connected to a second graphite gas pipe (7). The interior of the second graphite gas pipe (7) is provided with several distribution plates (8). The upper surface of the second graphite gas pipe (7) is fixedly connected to a quick-release connector (9), and the upper surface of the quick-release connector (9) is fixedly connected to the sintered graphite box (2).

2. The quick-connect preheating graphite box inlet and outlet structure for a high-temperature sintering furnace according to claim 1, characterized in that: The air intake cylinder (5) and the lower surface of the vacuum furnace (1) are fixedly connected. Several ventilation holes are evenly distributed inside the distribution plate (8), and the material of the distribution plate (8) is graphite plate.

3. The quick-connect preheating graphite box inlet and outlet structure for a high-temperature sintering furnace according to claim 1, characterized in that: The upper part of the inner surface of the sintered graphite box (2) is provided with two concave air outlets (10), and the two concave air outlets (10) are symmetrically arranged inside the sintered graphite box (2).

4. The quick-connect preheating graphite box inlet and outlet structure for a high-temperature sintering furnace according to claim 3, characterized in that: The upper surface of the vacuum furnace (1) is fixedly connected to both the left and right sides of the exhaust cylinder (4), and the input end of the exhaust cylinder (4) is fixedly connected to the first graphite gas pipe (3).

5. The quick-connect preheating graphite box inlet and outlet structure for a high-temperature sintering furnace according to claims 4 and 3, characterized in that: The first graphite gas pipe (3) extends into the sintered graphite box (2), and the inner wall of the first graphite gas pipe (3) and the concave gas outlet (10) abuts.

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