Closed graphitization furnace

Abstract

The utility model relates to the technical field of graphitization furnaces, and provides a closed graphitization furnace, which comprises a graphitization furnace and an inert gas tank, the top of the graphitization furnace penetrates through and is fixedly connected with a feed pipe, and the side surface of the graphitization furnace penetrates through and is fixedly connected with a discharge pipe. When the motor is started to drive the rotating shaft to rotate, the rotating shaft rotates to drive the spiral feeding paddle to rotate so as to convey raw materials in the graphitization furnace; through cooperation of a rotating gear, a toothed bar, a piston plate and other components, an air suction pipe continuously sucks inert gas in an inert gas tank, and the inert gas is discharged into the graphitization furnace through an air outlet pipe to exchange heat with gas at the bottom of the graphitization furnace, so that the heat dissipation performance of the lower part of the graphitization furnace is effectively improved, and the temperature of each area in the graphitization furnace is uniform; air pressure difference is not prone to occurring, deformation or explosion of the furnace body is avoided, and safety is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of graphitization furnaces, and particularly to a closed graphitization furnace. Background Art

[0002] Graphitization furnaces are mainly used for high-temperature treatments such as sintering and graphitization of carbon materials, graphitization of PI films, graphitization of thermal conductive materials, sintering of carbon fiber ropes, sintering and graphitization of carbon fiber filaments, purification of graphite powder, and other materials that can be graphitized in a carbon environment. It can be used at a temperature as high as 3000°C, has high production efficiency, energy-saving and power-saving features, and is equipped with an on-line temperature measurement and control system, which can monitor the temperature inside the furnace in real time and perform automatic adjustment.

[0003] The utility model with the publication number CN206142833U discloses a graphitization furnace with a furnace bottom ventilation function, including a furnace body. The furnace body includes a bottom plate and side walls that are connected to surround a furnace chamber. The bottom plate is arranged underground, a cover layer is arranged on the upper part of the furnace chamber, a heat dissipation wall is arranged on the side wall, and a plurality of air ducts are arranged outside the bottom of the bottom plate and the part of the side wall extending underground. The air duct is in a concave shape and is surrounded by a support and a support plate. The support surrounds the outside of the bottom plate and the part of the side wall extending underground, the support plate is arranged on the support, and the outlet of the air duct is arranged at the bottom of the part of the side wall above the ground. In the above application document, cold air on the ground is exchanged with hot air at the lower part of the furnace body (the outside of the part of the side wall extending underground and below the bottom) through the air duct, so as to effectively improve the heat dissipation of the lower part of the furnace body, ensure that the temperature adjustment capabilities of the upper and lower parts of the furnace body are similar, so that the temperature in each area of the furnace chamber is uniform, and it is not easy to have a pressure difference, avoiding the deformation or explosion of the furnace body. However, it makes the overall sealing performance of the furnace body worse, and heat loss is likely to occur during the heating operation, which is not conducive to the progress of production work. Summary of the Utility Model

[0004] The utility model provides a closed graphitization furnace.

[0005] The technical solution of the present utility model is as follows: A closed-type graphitization furnace, comprising a graphitization furnace and an inert gas tank. The top of the graphitization furnace is penetrated and fixedly connected with a feed pipe. The side of the graphitization furnace is penetrated and fixedly connected with a discharge pipe. A motor is arranged on one side of the graphitization furnace away from the discharge pipe. A rotating shaft is rotatably connected inside the graphitization furnace. A spiral feeding paddle is arranged on the surface of the rotating shaft. The output shaft of the motor is fixedly connected with the rotating shaft. A heating furnace chamber is arranged inside the graphitization furnace. A sealing gas supply mechanism is arranged on one side of the inert gas tank close to the graphitization furnace. A blockage clearing mechanism is arranged at the bottom of the graphitization furnace; The sealing gas supply mechanism includes a pressure chamber and a rotating gear. The pressure chamber is fixedly connected to one side of the inert gas tank close to the graphitization furnace. The two sides of the pressure chamber are respectively penetrated and fixedly connected with an air suction pipe and an air outlet pipe. A piston plate is slidably connected to the piston inside the pressure chamber. A sliding rod is fixedly connected to the top of the piston plate. The sliding rod penetrates and is slidably connected with the pressure chamber. A toothed rod is fixedly connected to the top of the sliding rod. A return spring is sleeved on the surface of the sliding rod. The rotating gear is fixedly connected to the surface of the rotating shaft.

[0006] One end of the air suction pipe away from the pressure chamber is penetrated and fixedly connected with the inert gas tank. One end of the air outlet pipe away from the pressure chamber is penetrated and fixedly connected with the graphitization furnace. The air suction pipe can suck the inert gas in the inert gas tank and discharge it into the graphitization furnace through the air outlet pipe.

[0007] The diameters of the feed pipe and the discharge pipe are the same, and sealing plugs are arranged at the ends of the feed pipe and the discharge pipe away from the graphitization furnace. The sealing plugs on the feed pipe and the discharge pipe can reduce the heat loss when the heating furnace chamber is heating.

[0008] The diameters of the air suction pipe and the air outlet pipe are the same, and check valves are arranged inside the air suction pipe and the air outlet pipe. The check valves in the air suction pipe and the air outlet pipe can limit the flow direction of the gas.

[0009] The check valve in the air suction pipe is unidirectionally conductive towards the inside of the pressure chamber, and the check valve in the air outlet pipe is unidirectionally conductive towards the inside of the graphitization furnace. When a negative pressure is formed in the pressure chamber, gas will be sucked into the pressure chamber through the air suction pipe. When the gas in the pressure chamber is squeezed, the gas will be discharged through the air outlet pipe.

[0010] Only half of the teeth of the rotating gear, and the teeth on the toothed rod are adapted to the teeth on the rotating gear. When the rotating gear rotates and meshes with the toothed rod, it will drive the toothed rod to move upward.

[0011] The two ends of the return spring are initially in contact with the inner top of the pressure chamber and the top of the piston plate. When the piston plate moves upward, it will squeeze the return spring and make it gradually tense.

[0012] The blockage clearing mechanism includes a pneumatic chamber. One end of the pneumatic chamber penetrates and is fixedly connected to the side of the pressure chamber, and the other end of the pneumatic chamber penetrates and is fixedly connected to the bottom of the graphitization furnace. An airbag is arranged at one end of the pneumatic chamber, and a push rod is slidably connected to the piston inside the other end of the pneumatic chamber. The end of the push rod away from the pneumatic chamber is fixedly connected to a blockage clearing block.

[0013] The airbag is located above the piston plate, and the airbag is in an inflated state in the initial state. When the piston plate moves upward, it will squeeze the airbag, and the air pressure inside the airbag will enter the pneumatic chamber to push the push rod to move to the right.

[0014] The bottom of the blockage clearing block is close to the end of the air outlet pipe away from the pressure chamber in the initial state. When the blockage clearing block moves back and forth, it will clear the end of the air outlet pipe away from the pressure chamber.

[0015] The working principle and beneficial effects of the present utility model are as follows:

[0016] 1. By providing a sealed air supply mechanism, the present utility model achieves that when the motor is started to drive the rotating shaft to rotate, and the rotating shaft drives the spiral feeding paddle to rotate to convey the raw materials in the graphitization furnace, at the same time, through the cooperation of components such as the rotating gear, the rack, and the piston plate, the suction pipe continuously sucks the inert gas in the inert gas tank and discharges it into the graphitization furnace through the air outlet pipe for heat exchange with the gas at the bottom of the graphitization furnace, thereby effectively improving the heat dissipation of the lower part of the graphitization furnace, making the temperature in each area of the graphitization furnace uniform, not easily generating air pressure difference, avoiding the occurrence of furnace body deformation or explosion, and effectively improving safety.

[0017] 2. By providing a blockage clearing mechanism, the present utility model achieves that when the piston plate in the pressure chamber moves up and down, causing the pressure chamber to repeatedly form negative pressure, at the same time, through the cooperation of components such as the airbag and the pneumatic chamber, the blockage clearing block is driven to move back and forth near the end of the air outlet pipe away from the pressure chamber, preventing blockage at the end of the air outlet pipe away from the pressure chamber and affecting the entry of inert gas. Description of the Drawings

[0018] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0019] Figure 1 It is the three-dimensional front view of the overall structure of the present utility model;

[0020] Figure 2 It is the three-dimensional sectional view of the overall structure of the present utility model;

[0021] Figure 3 It is the three-dimensional schematic diagram of the structure of the sealed air supply mechanism of the present utility model;

[0022] Figure 4This is a three-dimensional sectional view of the structure of the sealed air supply mechanism of the present utility model;

[0023] Figure 5 This is a three-dimensional schematic diagram of the structure of the blockage clearing mechanism of the present utility model.

[0024] In the figure: 1, graphitization furnace; 2, feed pipe; 3, discharge pipe; 4, motor; 5, rotating shaft; 6, spiral feeding paddle; 7, heating furnace chamber; 8, inert gas tank; 9, sealed air supply mechanism; 91, pressure chamber; 92, suction pipe; 93, discharge pipe; 94, piston plate; 95, slide bar; 96, toothed bar; 97, return spring; 98, rotating gear; 10, blockage clearing mechanism; 101, air pressure chamber; 102, airbag; 103, push rod; 104, blockage clearing block. Specific embodiments

[0025] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

[0026] Embodiment 1

[0027] As Figures 1 to 4As shown in the figure, this embodiment proposes a closed-type graphitization furnace, which includes a graphitization furnace 1 and an inert gas tank 8. The top of the graphitization furnace 1 penetrates and is fixedly connected with a feed pipe 2, and the side of the graphitization furnace 1 penetrates and is fixedly connected with a discharge pipe 3. The feed pipe 2 and the discharge pipe 3 have the same diameter, and sealing plugs are provided at the ends of the feed pipe 2 and the discharge pipe 3 away from the graphitization furnace 1. The sealing plugs on the feed pipe 2 and the discharge pipe 3 can reduce the heat loss when the heating furnace chamber 7 is heated. A motor 4 is provided on one side of the graphitization furnace 1 away from the discharge pipe 3. A rotating shaft 5 is rotatably connected inside the graphitization furnace 1. A spiral feeding paddle 6 is provided on the surface of the rotating shaft 5. The output shaft of the motor 4 is fixedly connected with the rotating shaft 5. A heating furnace chamber 7 is provided inside the graphitization furnace 1. A sealing gas supply mechanism 9 is provided on one side of the inert gas tank 8 close to the graphitization furnace 1. A clogging clearing mechanism 10 is provided at the bottom of the graphitization furnace 1; the sealing gas supply mechanism 9 includes a pressure chamber 91 and a rotating gear 98. The pressure chamber 91 is fixedly connected to one side of the inert gas tank 8 close to the graphitization furnace 1. An air suction pipe 92 and an air outlet pipe 93 penetrate and are fixedly connected to both sides of the pressure chamber 91 respectively. The end of the air suction pipe 92 away from the pressure chamber 91 penetrates and is fixedly connected with the inert gas tank 8. The air suction pipe 92 and the air outlet pipe 93 have the same diameter, and check valves are provided inside both the air suction pipe 92 and the air outlet pipe 93. The check valves in the air suction pipe 92 and the air outlet pipe 93 can limit the flow direction of the gas. The end of the air outlet pipe 93 away from the pressure chamber 91 penetrates and is fixedly connected with the graphitization furnace 1. The air suction pipe 92 can suck the inert gas in the inert gas tank 8 and discharge it into the graphitization furnace 1 through the air outlet pipe 93. A piston plate 94 is slidably connected to the piston inside the pressure chamber 91. The check valve in the air suction pipe 92 is unidirectionally conductive towards the inside of the pressure chamber 91, and the check valve in the air outlet pipe 93 is unidirectionally conductive towards the inside of the graphitization furnace 1. When a negative pressure is formed in the pressure chamber 91, gas will be sucked into the pressure chamber 91 through the air suction pipe 92. When the gas in the pressure chamber 91 is squeezed, the gas will be discharged through the air outlet pipe 93. A sliding rod 95 is fixedly connected to the top of the piston plate 94. The sliding rod 95 penetrates and is slidably connected to the pressure chamber 91. A toothed rod 96 is fixedly connected to the top of the sliding rod 95. A return spring 97 is sleeved on the surface of the sliding rod 95. The two ends of the return spring 97 are initially in contact with the inner top of the pressure chamber 91 and the top of the piston plate 94. When the piston plate 94 moves upward, the return spring 97 will be squeezed and gradually tightened. The rotating gear 98 is fixedly connected to the surface of the rotating shaft 5. Only half of the teeth are provided on the rotating gear 98, and the teeth on the toothed rod 96 are adapted to the teeth on the rotating gear 98. When the rotating gear 98 rotates and meshes with the toothed rod 96, it will drive the toothed rod 96 to move upward.

[0028] In this embodiment, raw materials can be added into the graphitization furnace 1 through the feed pipe 2. The motor 4 is started to drive the rotation of the rotating shaft 5. The rotation of the rotating shaft 5 drives the rotation of the spiral feeding paddle 6 to convey the raw materials in the graphitization furnace 1. The heating furnace chamber 7 can be started to heat the passing raw materials. Closing the sealing plugs on the feed pipe 2 and the discharge pipe 3 can reduce the heat loss during the heating of the heating furnace chamber 7. When the rotating shaft 5 rotates, it will also drive the rotation of the rotating gear 98. When the rotating gear 98 rotates and the teeth on it mesh with the teeth on the rack 96, it will drive the rack 96 to move upward. The upward movement of the rack 96 drives the slide bar 95 and the piston plate 94 to move upward, and the return spring 97 is gradually compressed and tightened. When the piston plate 94 moves upward, a negative pressure will be formed in the pressure chamber 91, so that the inert gas in the inert gas tank 8 is sucked into the pressure chamber 91 through the suction pipe 92. When the rotating gear 98 rotates to the part without teeth and disengages from the engagement with the rack 96, the return spring 97 will rebound to drive the piston plate 94, the slide bar 95 and the rack 96 to move downward to restore. At this time, the piston plate 94 will squeeze the inert gas in the pressure chamber 91 to discharge it into the graphitization furnace 1 through the air outlet pipe 93, and perform heat exchange with the gas at the bottom of the graphitization furnace 1, thereby effectively improving the heat dissipation of the lower part of the graphitization furnace 1, making the temperature of each area in the graphitization furnace 1 uniform, not prone to air pressure difference, avoiding the occurrence of furnace body deformation or explosion, and effectively improving safety.

[0029] Embodiment 2

[0030] As Figures 1 to 5 shown, based on the same concept as the above Embodiment 1, this embodiment also proposes a blockage clearing mechanism 10, including a pneumatic chamber 101. One end of the pneumatic chamber 101 penetrates and is fixedly connected to the side surface of the pressure chamber 91, and the other end of the pneumatic chamber 101 penetrates and is fixedly connected to the bottom of the graphitization furnace 1. One end of the pneumatic chamber 101 is provided with an airbag 102. A piston in the other end of the pneumatic chamber 101 is slidably connected with a push rod 103. The airbag 102 is located above the piston plate 94, and the airbag 102 is in an inflated state in the initial state. When the piston plate 94 moves upward, it will squeeze the airbag 102. When the airbag 102 is squeezed, the air pressure inside it will enter the pneumatic chamber 101 to push the push rod 103 to move to the right. One end of the push rod 103 away from the pneumatic chamber 101 is fixedly connected with a blockage clearing block 104. The bottom of the blockage clearing block 104 is initially close to the end of the air outlet pipe 93 away from the pressure chamber 91. When the blockage clearing block 104 moves back and forth, it will clear the end of the air outlet pipe 93 away from the pressure chamber 91.

[0031] In this embodiment, when the piston plate 94 moves upward, it will squeeze the airbag 102. When the airbag 102 is squeezed, the air pressure inside it will enter the air pressure chamber 101 and push the push rod 103 to move to the right. The movement of the push rod 103 to the right drives the blockage clearing block 104 to move to the right. When the piston plate 94 moves downward and leaves the airbag 102, the airbag 102 rebounds and the air pressure returns to the airbag 102. At this time, the push rod 103 drives the blockage clearing block 104 to move to the left to restore. By repeatedly moving the blockage clearing block 104 near the end of the air outlet pipe 93 far from the pressure chamber 91, it is prevented that the end of the air outlet pipe 93 far from the pressure chamber 91 is blocked, which affects the entry of the inert gas.

[0032] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A closed graphite furnace, characterized in that, It includes a graphitization furnace (1) and an inert gas tank (8). The top of the graphitization furnace (1) is penetrated and fixedly connected with a feed pipe (2). The side of the graphitization furnace (1) is penetrated and fixedly connected with a discharge pipe (3). A motor (4) is arranged on one side of the graphitization furnace (1) away from the discharge pipe (3). A rotating shaft (5) is rotatably connected inside the graphitization furnace (1). A spiral feeding paddle (6) is arranged on the surface of the rotating shaft (5). The output shaft of the motor (4) is fixedly connected with the rotating shaft (5). A heating furnace chamber (7) is arranged inside the graphitization furnace (1). A sealing gas supply mechanism (9) is arranged on one side of the inert gas tank (8) close to the graphitization furnace (1). A blockage clearing mechanism (10) is arranged at the bottom of the graphitization furnace (1). The sealing gas supply mechanism (9) includes a pressure chamber (91) and a rotating gear (98). The pressure chamber (91) is fixedly connected to one side of the inert gas tank (8) close to the graphitization furnace (1). An air suction pipe (92) and an air outlet pipe (93) are respectively penetrated and fixedly connected to both sides of the pressure chamber (91). A piston plate (94) is slidably connected to the piston inside the pressure chamber (91). A sliding rod (95) is fixedly connected to the top of the piston plate (94). The sliding rod (95) is penetrated and slidably connected to the pressure chamber (91). A toothed rod (96) is fixedly connected to the top of the sliding rod (95). A return spring (97) is sleeved on the surface of the sliding rod (95). The rotating gear (98) is fixedly connected to the surface of the rotating shaft (5).

2. The hermetic graphitization furnace according to claim 1, characterized in that, One end of the air suction pipe (92) away from the pressure chamber (91) is penetrated and fixedly connected to the inert gas tank (8). One end of the air outlet pipe (93) away from the pressure chamber (91) is penetrated and fixedly connected to the graphitization furnace (1).

3. The hermetic graphitization furnace according to claim 2, wherein, The feed pipe (2) and the discharge pipe (3) have the same pipe diameter, and sealing plugs are arranged at the ends of the feed pipe (2) and the discharge pipe (3) away from the graphitization furnace (1).

4. The enclosed graphitization furnace according to claim 3, characterized in that, The air suction pipe (92) and the air outlet pipe (93) have the same pipe diameter, and one-way valves are arranged inside the air suction pipe (92) and the air outlet pipe (93).

5. The hermetic graphitization furnace according to claim 4, characterized in that, The one-way valve in the air suction pipe (92) is unidirectionally conductive towards the inside of the pressure chamber (91), and the one-way valve in the air outlet pipe (93) is unidirectionally conductive towards the inside of the graphitization furnace (1).

6. The hermetic graphitization furnace according to claim 5, characterized in that, Only half of the teeth are on the rotating gear (98), and the teeth on the toothed rod (96) are adapted to the teeth on the rotating gear (98).

7. The hermetic graphitization furnace according to claim 6, wherein, Both ends of the return spring (97) are initially in contact with the inner top of the pressure chamber (91) and the top of the piston plate (94).

8. The closed-type graphitization furnace according to claim 7, characterized in that, The blockage clearing mechanism (10) includes a pneumatic chamber (101). One end of the pneumatic chamber (101) penetrates and is fixedly connected to the side surface of the pressure chamber (91), and the other end of the pneumatic chamber (101) penetrates and is fixedly connected to the bottom of the graphitization furnace (1). An airbag (102) is arranged at one end of the pneumatic chamber (101), and a push rod (103) is slidably connected to the piston inside the other end of the pneumatic chamber (101). One end of the push rod (103) away from the pneumatic chamber (101) is fixedly connected to a blockage clearing block (104).

9. The hermetic graphitization furnace according to claim 8, characterized in that, The airbag (102) is located above the piston plate (94), and the airbag (102) is in an inflated state in the initial state.

10. A sealed graphitization furnace according to claim 9, characterized in that, The bottom of the blockage clearing block (104) is close to the end of the air outlet pipe (93) away from the pressure chamber (91) in the initial state.

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