Vacuum pressure sintering integrated device for silicon carbide sealing ring

Abstract

The utility model relates to the technical field of silicon carbide sintering, in particular to a silicon carbide sealing ring vacuum pressure sintering integrated device which comprises a furnace body, a combustion bin is arranged in the furnace body, an annular cavity is formed between the combustion bin and the inner wall of the furnace body, and a sewage discharge groove is formed in the bottom wall of the combustion bin. A waste discharge pipeline is fixedly connected to the furnace body, one end of the waste discharge pipeline communicates with the annular cavity, and the other end of the waste discharge pipeline is used for being connected with an external dust suction device. A dust collection assembly is arranged below the combustion bin and comprises an elastic piece, a dust collection assembly and a dust collection assembly, and the lower end of the elastic piece is fixed in the furnace body; the baffle is arranged on the elastic piece in a sliding and sleeving mode and abuts against and seals the dirt discharging groove upwards under the elastic force effect of the elastic piece; when an external dust collection device is started and negative pressure is generated in the annular cavity, the negative pressure acts on the baffle to overcome the elastic force of the elastic piece to enable the baffle to move downwards, so that the sewage discharge groove is exposed, slag in the combustion bin falls into the bottom of the furnace body through the sewage discharge groove and is sucked into the annular cavity and the waste discharge pipeline to be discharged, and automatic slag removal is achieved.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide sintering technology, and more specifically, to an integrated device for vacuum pressure sintering of silicon carbide sealing rings. Background Technology

[0002] Silicon carbide sealing rings occupy an important position in high-end sealing fields such as petrochemicals and aerospace due to their excellent high-temperature resistance, wear resistance, and chemical stability. The vacuum pressure sintering process used in their production requires a high-temperature environment above 1600℃. Volatile substances and impurities in the raw materials will form solid slag during the sintering process, which will continuously deposit inside the combustion chamber.

[0003] Traditional slag removal processes in sintering equipment present significant technical bottlenecks: on the one hand, the high-temperature environment inside the furnace requires the equipment to undergo a complete cooling cycle of several hours to tens of hours, resulting in insufficient equipment utilization; on the other hand, operators must manually clean the high-temperature slag by opening the furnace door, facing occupational risks such as burns and dust inhalation. This operating method not only causes the production line to be interrupted due to cooling and slag removal, significantly reducing production efficiency, but also poses safety hazards such as high-temperature burns and dust inhalation. In addition, the introduction of external oxygen and dust during furnace start-up may cause secondary pollution risks such as product oxidation or purity reduction, seriously restricting the continuous production and quality stability of silicon carbide sealing rings.

[0004] Therefore, there is an urgent need for an integrated vacuum pressure sintering device for silicon carbide sealing rings to improve the shortcomings of existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide an integrated vacuum pressure sintering device for silicon carbide sealing rings. The negative pressure generated by an external dust extraction device is transmitted to the annular cavity via a waste discharge pipe, instantly triggering a baffle to move downwards. This opens the waste discharge trough on the combustion chamber wall, allowing high-temperature slag to fall to the furnace bottom under the combined action of gravity and suction. It is then drawn into the waste discharge pipe by the negative pressure and discharged directionally, thus solving the problems mentioned in the background art.

[0006] Silicon carbide sealing rings inevitably produce slag during vacuum pressure sintering. Traditional manual slag removal methods require the equipment to undergo a complete cooling cycle of several hours to tens of hours due to the high temperature environment inside the furnace, resulting in insufficient equipment utilization. Operators need to open the furnace door to manually remove the high-temperature slag, facing occupational risks such as burns and dust inhalation.

[0007] To achieve the above objectives, this utility model provides an integrated vacuum pressure sintering device for silicon carbide sealing rings, including a furnace body, a combustion chamber inside the furnace body, an annular cavity between the combustion chamber and the inner wall of the furnace body, and a drain trough on the bottom wall of the combustion chamber.

[0008] A waste discharge pipe is fixedly connected to the furnace body. One end of the waste discharge pipe is connected to the annular cavity, and the other end is used to connect to an external dust collection device.

[0009] A dust collection assembly is provided below the combustion chamber. The dust collection assembly includes: an elastic element, the lower end of which is fixed inside the furnace body; and a baffle, which is slidably sleeved on the elastic element and pressed upward against the drain trough by the elastic force of the elastic element.

[0010] When the external dust collection device is activated and generates negative pressure in the annular cavity, the negative pressure acts on the baffle to overcome the elastic force of the elastic element and move it downward, thereby exposing the slag discharge trough. The slag inside the combustion chamber falls into the bottom of the furnace body through the slag discharge trough and is sucked into the annular cavity and the waste discharge pipe for discharge, thus realizing automatic slag removal.

[0011] In the above technical solution, negative pressure is transmitted into the annular cavity through the waste discharge pipe. This negative pressure acts on a baffle that is slidably fitted onto an elastic element, overcoming the elastic force of the element and causing it to move downwards, thereby opening the waste discharge trough that was originally sealed by the baffle. At this time, the slag in the combustion chamber falls into the bottom of the furnace body under the action of gravity through the waste discharge trough. Simultaneously, under the suction force of the negative pressure in the annular cavity, the slag is drawn into the annular cavity and discharged directionally through the waste discharge pipe, realizing an automatic slag removal process without manual intervention.

[0012] Based on this, the baffle is made of high-temperature resistant alloy material, and the area covering the drain trough is larger than the trough opening area. This allows it to tightly seal the drain trough under normal conditions through the elastic force of the elastic element, preventing high-temperature gas leakage or material slag accumulation and blockage. Simultaneously, it can accurately expose the trough opening when negative pressure is triggered. The combustion chamber is fixed to the inner wall of the furnace via a support plate, forming an annular cavity as a negative pressure conduction channel. A high-temperature resistant compression spring acts as the elastic element, pushing the baffle upwards to seal the drain trough under normal conditions. When the external dust collection device is activated, generating negative pressure in the annular cavity, the negative pressure overcomes the spring force, causing the baffle to move downwards. At this point, the drain trough opens, and the material slag is discharged through the cavity and waste pipe under the action of gravity and suction.

[0013] In another technical solution, a hinged, closable furnace door is attached to one end of the furnace body, a support bracket is fixedly connected to the bottom of the furnace body, and a quick-connect connector is provided at the connection between the waste discharge pipe and the external dust collection device for easy connection and disconnection.

[0014] This technical solution features a hinged furnace door at one end of the furnace body, facilitating the placement of workpieces before sintering and equipment maintenance after sintering. A fixed support frame at the bottom of the furnace body ensures structural stability during high-temperature operation. Notably, the connection between the waste discharge pipe and the external dust collection device utilizes a quick-connect coupling design, enabling rapid connection and disconnection of the dust collection device. This facilitates efficient connection during slag removal operations and allows for quick disassembly of the pipe for maintenance when not in a slag removal state.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This integrated vacuum pressure sintering device for silicon carbide sealing rings uses negative pressure generated by an external dust extraction device, which is transmitted to the annular cavity through a waste discharge pipe. This instantly triggers the baffle to move downward, opening the sludge discharge trough on the combustion chamber wall. The high-temperature slag falls into the furnace bottom under the combined action of gravity and suction, and is then drawn into the waste discharge pipe by negative pressure and discharged in a directed manner. This avoids operators coming into contact with the high-temperature furnace body or harmful dust, eliminating the risk of workplace injuries. Slag cleaning can be started immediately after a single sintering cycle, shortening equipment downtime and supporting continuous multi-batch production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0018] Figure 2 This is a schematic diagram of the furnace body structure for an embodiment;

[0019] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the embodiment;

[0020] Figure 4 This is a schematic diagram of the combustion chamber structure in an embodiment.

[0021] The meanings of the labels in the diagram are as follows:

[0022] 100. Furnace body; 110. Furnace door; 120. Combustion chamber; 121. Sewage discharge trough; 130. Support bracket; 140. Support plate; 200. Dust collection assembly; 210. Baffle; 220. Elastic component; 230. Waste discharge pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The current manual slag removal method requires the equipment to undergo a complete cooling cycle of several hours to tens of hours due to the high temperature environment inside the furnace, resulting in insufficient equipment utilization. Operators must manually clean the high-temperature slag by opening the furnace door 110°, facing occupational risks such as burns and dust inhalation. Please refer to [link / reference needed]. Figures 1-4 As shown, this embodiment provides an integrated vacuum pressure sintering device for silicon carbide sealing rings, including a furnace body 100, a combustion chamber 120 inside the furnace body 100, an annular cavity between the combustion chamber 120 and the inner wall of the furnace body 100, and a drain trough 121 on the bottom wall of the combustion chamber 120.

[0025] A waste discharge pipe 230 is fixedly connected to the furnace body 100. One end of the waste discharge pipe 230 is connected to the annular cavity, and the other end is used to connect to an external dust collection device.

[0026] A dust collection assembly 200 is provided below the combustion chamber 120. The dust collection assembly 200 includes: an elastic element 220, the lower end of which is fixed inside the furnace body 100; and a baffle 210, which is slidably sleeved on the elastic element 220 and pressed upward against the sealing drain trough 121 by the elastic force of the elastic element 220.

[0027] When the external dust collection device is activated and generates negative pressure in the annular cavity, the negative pressure acts on the baffle 210 to overcome the elastic force of the elastic element 220 and cause it to move downward, thereby exposing the slag discharge trough 121. The slag inside the combustion chamber 120 falls into the bottom of the furnace body 100 through the slag discharge trough 121 and is sucked into the annular cavity and discharged through the waste discharge pipe 230, thus realizing automatic slag removal.

[0028] During implementation, when the external dust collection device is activated, the negative pressure generated is transmitted to the annular cavity through the waste discharge pipe 230. This negative pressure acts directly on the surface of the baffle 210, overcoming the elastic force of the elastic element 220 and driving the baffle 210 to move downward, causing the sludge discharge trough 121 on the bottom wall of the combustion chamber 120 to open instantly. The high-temperature slag in the combustion chamber 120 falls into the bottom of the furnace body 100 under the action of gravity through the sludge discharge trough 121, and is then directionally sucked in by the negative pressure airflow of the annular cavity, and finally efficiently discharged through the waste discharge pipe 230. The slag removal is completed entirely within the furnace body 100, and after the slag removal is completed, the baffle 210 automatically resets and seals the sludge discharge trough 121 under the action of the elastic element 220.

[0029] See Figure 2 As shown, during the automatic slag removal process, the openable and closable furnace door 110, which is hinged to one end of the furnace body 100, remains sealed to ensure that the sintering chamber is isolated from the outside and that the negative pressure environment formed in the annular cavity is not disturbed. At the same time, the support bracket 130, which is fixedly connected to the bottom of the furnace body 100, provides stable support for the entire device, preventing equipment displacement caused by negative pressure suction or slag impact during slag removal, and ensuring the smooth execution of the automatic slag removal process.

[0030] Figure 3 and Figure 4When the external dust collection device is activated, a negative pressure is generated in the annular cavity. This negative pressure overcomes the elastic force of the high-temperature compression spring, causing the baffle 210, which is slidably sleeved on the spring, to move downward, thereby exposing the sludge discharge trough 121 on the bottom wall of the combustion chamber 120. Since the baffle 210 is made of high-temperature alloy material and its coverage area is larger than the opening of the sludge discharge trough 121, it can seal the trough opening under normal conditions. At this time, the slag falls into the bottom of the furnace body 100 under the action of gravity through the sludge discharge trough 121. At the same time, the negative pressure is conducted through the annular cavity, drawing the slag into the waste discharge pipe 230. The quick-connect joint between the waste discharge pipe 230 and the dust collection device ensures rapid conduction of the negative pressure, ultimately achieving automatic discharge of the slag without the need for manual cleaning.

[0031] In this embodiment, the integrated vacuum pressure sintering device for silicon carbide sealing rings is used in the following way: First, the combustion chamber 120 is fixed to the inner wall of the furnace body 100 via a support plate 140, forming an annular cavity. The drain trough 121 on the bottom wall of the combustion chamber 120 is sealed by a baffle 210 slidably fitted onto a high-temperature compression spring. The baffle 210 is made of a high-temperature alloy material, and the area covering the drain trough 121 is larger than the opening of the trough. This not only allows for a tight seal against the opening of the trough by the spring force, preventing gas leakage or slag accumulation during high-temperature sintering, but also ensures the structure remains stable and does not deform in a high-temperature environment. At this time, the support bracket 130 at the bottom of the furnace body 100 ensures the overall stability of the device, and the furnace door 110 can be closed to maintain the internal vacuum sintering environment.

[0032] When the external dust collection device is activated, it connects to the annular cavity via the waste discharge pipe 230, instantly generating negative pressure within the annular cavity. This negative pressure is transmitted through the annular cavity to the area below the baffle 210, overcoming the elastic force of the high-temperature compression spring and pushing the baffle 210 downwards along the spring, thereby exposing the slag discharge trough 121. The slag in the combustion chamber 120 falls into the bottom of the furnace body 100 under gravity through the slag discharge trough 121. Simultaneously, the negative pressure suction draws the slag into the annular cavity and quickly guides it to the external dust collection device for discharge through the quick-connect fitting of the waste discharge pipe 230. After slag removal is complete, the dust collection device is turned off, the negative pressure in the annular cavity disappears, and the spring force pushes the baffle 210 upwards to reset, resealing the slag discharge trough 121. The entire process requires no manual intervention, achieving automatic removal of slag after sintering.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum pressure sintering integrated device for silicon carbide sealing rings, comprising a furnace body (100), characterized in that: The furnace body (100) is provided with a combustion chamber (120) inside. An annular cavity is formed between the combustion chamber (120) and the inner wall of the furnace body (100). A drain trough (121) is provided on the bottom wall of the combustion chamber (120). A waste discharge pipe (230) is fixedly connected to the furnace body (100). One end of the waste discharge pipe (230) is connected to the annular cavity, and the other end is used to connect to an external dust collection device. Below the combustion chamber (120) is a dust collection assembly (200), which includes: an elastic element (220) whose lower end is fixed inside the furnace body (100); and a baffle (210) which is slidably sleeved on the elastic element (220) and pressed against the drain trough (121) by the elastic force of the elastic element (220). When the external dust collection device is activated and generates negative pressure in the annular cavity, the negative pressure acts on the baffle (210) to overcome the elastic force of the elastic element (220) and cause it to move downward, thereby exposing the slag discharge trough (121). The slag inside the combustion chamber (120) falls into the bottom of the furnace body (100) through the slag discharge trough (121) and is sucked into the annular cavity and discharged through the waste discharge pipe (230), thus realizing automatic slag removal.

2. The integrated vacuum pressure sintering apparatus for silicon carbide sealing rings according to claim 1, characterized in that: The furnace body (100) is hinged to one end with an openable and closable furnace door (110).

3. The integrated vacuum pressure sintering apparatus for silicon carbide sealing rings according to claim 1, characterized in that: The bottom of the furnace body (100) is fixedly connected to a support bracket (130).

4. The integrated vacuum pressure sintering apparatus for silicon carbide sealing rings according to claim 1, characterized in that: The baffle (210) is made of high-temperature resistant alloy material, and the area of ​​the baffle (210) covering the sewage trough (121) is larger than the opening area of ​​the sewage trough (121).

5. The integrated vacuum pressure sintering apparatus for silicon carbide sealing rings according to claim 1, characterized in that: The elastic element (220) is a high-temperature resistant compression spring.

6. The integrated vacuum pressure sintering apparatus for silicon carbide sealing rings according to claim 1, characterized in that: A support plate (140) is fixedly connected to the outer surface of the combustion chamber (120), and the other end of the support plate (140) is fixedly connected to the inner surface of the furnace body (100), thereby forming an annular cavity between the combustion chamber (120) and the furnace body (100).

7. The integrated vacuum pressure sintering apparatus for silicon carbide sealing rings according to claim 1, characterized in that: The waste discharge pipe (230) is equipped with a quick-connect fitting at the connection point with the external vacuuming device, which facilitates quick connection and disconnection.

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