Automatic lifting hearth structure of vertical vacuum sintering furnace

Abstract

The utility model discloses an automatic lifting hearth structure of a vertical vacuum sintering furnace, which comprises a furnace cover body and a movably arranged hearth body, and the back of the furnace cover body is provided with a gas transmission piece for transmitting argon; the output end of the gas conveying piece is connected with one end of the conveying pipe, the other end of the conveying pipe extends into the middle of the vertical pipe, a lifting mechanism is arranged in the vertical pipe, the height of the moving rods at the upper end and the lower end is adjusted through the lifting mechanism, and the metal parts in the furnace are prevented from being subjected to an oxidation reaction with oxygen in air. According to the automatic lifting hearth structure of the vertical vacuum sintering furnace, the lifting mechanism is arranged, and through the arrangement of the lifting mechanism and the air inflation mechanism, the space between the furnace cover body and the hearth body can be filled with argon through the arrangement of the air inflation mechanism, and the furnace cover body and the hearth body can be conveniently detached; and the oxidation reaction between metal parts in the furnace and oxygen in the air is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of vertical vacuum sintering furnaces, specifically to an automatic lifting furnace chamber structure for a vertical vacuum sintering furnace. Background Technology

[0002] In the process of sintering, feeding and discharging, vertical vacuum sintering furnaces require separate lifting operations for the vacuum chamber and the furnace body. The common control method is to install two lifting mechanisms to control the lifting of the vacuum chamber and the furnace body respectively, which requires the use of a lifting furnace chamber mechanism.

[0003] Existing lifting mechanisms place high demands on the vacuum and high-temperature environment within the vacuum sintering furnace, requiring high stability. The more complex the structure and the more components involved, the greater the impact on stability. Damage to the structure necessitates disassembling and repairing the entire vacuum sintering furnace, significantly affecting the vacuum level. To address these shortcomings, a lifting mechanism for the vacuum chamber of a vertical vacuum sintering furnace body, disclosed in existing technology (Chinese patent application number CN202421171487.5, publication date 2025-02-11), can be referenced. This mechanism utilizes the principle of magnetic attraction to achieve external lifting adjustment while maintaining a vacuum environment, ensuring stability and reducing operational complexity.

[0004] Although the above-mentioned device can solve the existing problems, it still has certain shortcomings in use. When it is running through the lifting mechanism, due to the internal vacuum phenomenon, the adsorption force is relatively large during separation. During separation, the sealing gasket inside the vertical vacuum sintering furnace is very easy to fall off, which can lead to the phenomenon of falling off during operation.

[0005] Therefore, we proposed an automatic lifting furnace chamber structure for vertical vacuum sintering furnaces, which can effectively solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide an automatic lifting furnace chamber structure for a vertical vacuum sintering furnace, in order to solve the problem mentioned in the background art that, during the operation of the lifting mechanism currently on the market, due to the internal vacuum phenomenon, the adsorption force is relatively large during separation, which easily causes the sealing gasket inside the vertical vacuum sintering furnace to fall off, thus causing the gasket to fall off during operation.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automatic lifting furnace chamber structure for a vertical vacuum sintering furnace, comprising a furnace cover and a movable furnace chamber. A gas conveying component for conveying argon gas is installed on the back of the furnace cover. The output end of the gas conveying component is connected to one end of a conveying pipe, and the other end of the conveying pipe extends into the middle of a vertical pipe. A lifting mechanism is provided inside the vertical pipe, which allows for height adjustment of the moving rods at both ends, enabling separation between the furnace cover and the furnace chamber. One side of the vertical pipe is connected to the inner wall of the furnace cover via a gas conveying pipe. An inflation mechanism is provided inside the gas conveying pipe, which facilitates disassembly between the furnace cover and the furnace chamber and prevents oxidation of the metal components inside the furnace with oxygen in the air.

[0008] As a preferred technical solution of this application, the lifting mechanism includes two sets of piston blocks fixed to the inner side of the moving rods. The top of the upper moving rod is fixed to the bottom of the connecting frame, and the inner side of the connecting frame is fixed to the upper outer wall of the furnace body. The two sets of piston blocks are connected by a return spring.

[0009] As a preferred technical solution of this application, the outer wall of the piston block is attached to the inner wall of the vertical tube, and the moving rod forms a sliding structure between the piston block and the inner wall of the vertical tube.

[0010] As a preferred technical solution of this application, the end of the gas supply pipe connected to the furnace cover is made of flexible tubing, while the end of the gas supply pipe connected to the vertical pipe is made of rigid tubing.

[0011] As a preferred technical solution of this application, the inflation mechanism includes a fixed ring fixed inside the air supply pipe with a rigid tube. One end of the fixed ring is fixed to the first end of the connecting spring, and the other end of the connecting spring is fixed to one side of the conical block. The inside of the conical block fits into the inside of the conical hole.

[0012] As a preferred technical solution of this application, the conical hole is opened at the rigid end of the gas transmission pipe, a sealing gasket is provided on the outer side of the conical block, and the elastic force of the connecting spring is less than the elastic force of the return spring.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This vertical vacuum sintering furnace has an automatic lifting furnace chamber structure, which is equipped with a lifting mechanism. This lifting mechanism facilitates the separation of the furnace cover and the furnace chamber. Furthermore, the gas filling mechanism allows argon gas to be filled between the furnace cover and the furnace chamber, facilitating disassembly and preventing oxidation of the metal components inside the furnace with oxygen in the air. Specific details are as follows:

[0014] 1. A gas supply pipe is installed, through which argon gas is delivered to the space between the furnace cover and the furnace chamber via a conical hole, so that the vacuum environment is filled with gas, allowing the negative pressure environment to be released. Furthermore, filling the interior of the furnace cover and the furnace chamber with gas can also prevent the metal parts inside the furnace from undergoing an oxidation reaction with oxygen in the air.

[0015] 2. A vertical tube is installed, and two sets of movable rods that slide inside the vertical tube can move relative to each other, thereby causing the movable rods to separate the furnace cover from the furnace body. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 This is a schematic diagram of the main sectional view of the vertical tube structure of this utility model;

[0020] Figure 5 This is a partial cross-sectional structural diagram of the gas pipeline of this utility model;

[0021] Figure 6 This is a schematic diagram of the furnace cover and furnace chamber of this utility model in a separated state.

[0022] In the diagram: 1. Furnace cover; 2. Furnace chamber; 3. Gas supply component; 4. Delivery pipe; 5. Vertical pipe; 6. Moving rod; 7. Connecting frame; 8. Piston block; 9. Return spring; 10. Gas supply pipe; 11. Fixing ring; 12. Connecting spring; 13. Conical block; 14. Conical hole. 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] Please see Figures 1-6 The present invention provides the following technical solution:

[0025] Example 1

[0026] To address the issue that vertical vacuum sintering furnaces on the market, when operating via a lifting mechanism, experience significant suction forces during separation due to the internal vacuum, which can easily cause the internal sealing gaskets to detach, thus leading to detachment during operation, please refer to the attached document. Figure 1 - Appendix Figure 5 The furnace includes a furnace cover 1 and a movable furnace chamber 2. A gas supply component 3 for supplying argon gas is installed on the back of the furnace cover 1. One side of the vertical pipe 5 is connected to the inner wall of the furnace cover 1 via a gas supply pipe 10. An inflation mechanism is installed inside the gas supply pipe 10. This inflation mechanism facilitates the disassembly of the furnace cover 1 and the furnace chamber 2 and prevents oxidation of the metal components inside the furnace with oxygen in the air. The inflation mechanism includes a fixing ring 11 fixed inside the rigid gas supply pipe 10. One end of the fixing ring 11 is fixed to the first end of the connecting spring 12, and the other end of the connecting spring 12 is fixed to one side of the conical block 13. The inside of the conical block 13 fits into the inside of the conical hole 14. The conical hole 14 is opened at the rigid end of the gas supply pipe 10. A sealing gasket is provided on the outside of the conical block 13. The elastic force of the connecting spring 12 is less than the elastic force of the return spring 9. The gas supply pipe 10 is made of flexible hose at the end connected to the furnace cover 1, and is made of rigid hose at the end connected to the vertical pipe 5.

[0027] First, argon gas is supplied to the inside of the supply pipe 4 through the gas supply component 3, allowing the argon gas to enter the middle of the vertical pipe 5 through the supply pipe 4. Then, the argon gas is supplied through the gas supply pipe 10. Since the elastic force of the connecting spring 12 is less than that of the return spring 9, the argon gas will be supplied through the fixing ring 11. At this time, the connecting spring 12 will deform, causing the conical block 13 to be in an open state. Subsequently, the conical block 13 extends into the conical hole 14, causing the gas supply pipe 10 to be in an open state. This allows the argon gas to enter the interior of the furnace cover body 1 and the furnace chamber body 2. When it enters the furnace cover body... After the argon gas is placed inside the furnace body 1 and the furnace chamber 2, there are two advantages. First, the negative pressure environment can be released, which facilitates the subsequent separation process. When the argon gas is delivered into the furnace body 1 and the furnace chamber 2, it also prevents the metal parts inside the furnace from undergoing an oxidation reaction with the oxygen in the air. In addition, an appropriate amount can be injected between the furnace body 1 and the furnace chamber 2 according to the actual situation. The valve between the furnace body 1 and the gas supply pipe 10 is closed. When the valve is not closed, the argon gas will provide a thrust to separate the furnace body 1 and the furnace chamber 2. When the argon gas is closed, the lifting mechanism between the furnace body 1 and the furnace chamber 2 can also be operated.

[0028] Example 2

[0029] To facilitate the separation of the furnace cover 1 from the furnace chamber 2, please refer to the attached document. Figure 1- Appendix Figure 4 and attached Figure 6 The furnace includes a furnace cover 1 and a movable furnace chamber 2. A gas delivery component 3 for supplying argon gas is installed on the back of the furnace cover 1. The output end of the gas delivery component 3 is connected to one end of a delivery pipe 4, and the other end of the delivery pipe 4 extends into the middle of a vertical pipe 5. A lifting mechanism is installed inside the vertical pipe 5. The lifting mechanism allows for height adjustment of the moving rods 6 at both ends, enabling separation between the furnace cover 1 and the furnace chamber 2. The lifting mechanism includes two sets of piston blocks 8 fixed to the inner side of the moving rods 6. The top of the upper moving rod 6 is fixed to the bottom of a connecting frame 7, and the inner side of the connecting frame 7 is fixed to the upper outer wall of the furnace chamber 2. The two sets of piston blocks 8 are connected by a return spring 9. The outer wall of the piston block 8 is attached to the inner wall of the vertical pipe 5, and the moving rod 6 forms a sliding structure between the piston block 8 and the inner wall of the vertical pipe 5.

[0030] When gas is no longer supplied between the furnace cover 1 and the furnace chamber 2, the gas will act inside the vertical pipe 5, causing the piston block 8 to move. This causes the piston block 8 to move the moving rod 6 relative to the furnace chamber 2, allowing the furnace chamber 2 to move inside the furnace cover 1 via the connecting frame 7. This facilitates the separation of the furnace cover 1 and the furnace chamber 2.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic lifting furnace structure for a vertical vacuum sintering furnace, comprising a furnace cover (1) and a movable furnace body (2), wherein a gas conveying component (3) for conveying argon gas is installed on the back of the furnace cover (1); Its features are: The output end of the gas conveying component (3) is connected to one end of the conveying pipe (4), and the other end of the conveying pipe (4) extends into the middle of the vertical pipe (5). The vertical pipe (5) is equipped with a lifting mechanism. The lifting mechanism enables the upper and lower moving rods (6) to adjust the height, thereby separating the furnace cover (1) from the furnace body (2). One side of the vertical pipe (5) is connected to the inner wall of the furnace cover (1) via a gas supply pipe (10). An air filling mechanism is provided inside the gas supply pipe (10). The air filling mechanism makes it easier to disassemble the furnace cover (1) and the furnace chamber (2) and avoids oxidation of the metal parts inside the furnace with oxygen in the air.

2. The automatic lifting furnace chamber structure of a vertical vacuum sintering furnace according to claim 1, characterized in that: The lifting mechanism includes two sets of piston blocks (8) fixed inside the moving rods (6). The top of the upper moving rod (6) is fixed to the bottom of the connecting frame (7). The inner side of the connecting frame (7) is fixed to the upper outer wall of the furnace body (2). The two sets of piston blocks (8) are connected by a return spring (9).

3. The automatic lifting furnace chamber structure of a vertical vacuum sintering furnace according to claim 2, characterized in that: The outer wall of the piston block (8) is attached to the inner wall of the vertical tube (5), and the moving rod (6) forms a sliding structure between the piston block (8) and the inner wall of the vertical tube (5).

4. The automatic lifting furnace chamber structure of a vertical vacuum sintering furnace according to claim 1, characterized in that: The gas supply pipe (10) is made of a flexible hose at one end connected to the furnace cover (1), and a rigid pipe at the other end connected to the vertical pipe (5).

5. The automatic lifting furnace chamber structure of a vertical vacuum sintering furnace according to claim 1, characterized in that: The inflation mechanism includes a fixed ring (11) fixed inside the rigid air supply pipe (10). One end of the fixed ring (11) is fixed to the head end of the connecting spring (12), and the other end of the connecting spring (12) is fixed to one side of the conical block (13). The inside of the conical block (13) fits into the inside of the conical hole (14).

6. The automatic lifting furnace chamber structure of a vertical vacuum sintering furnace according to claim 5, characterized in that: The conical hole (14) is opened at the hard end of the gas transmission pipe (10), a sealing gasket is provided on the outside of the conical block (13), and the elastic force of the connecting spring (12) is less than the elastic force of the return spring (9).

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