Continuous carbonization furnace

Abstract

The present invention relates to a continuous carbonization furnace. The continuous carbonization furnace comprises a furnace tube and two groups of feeding and pulling structures respectively arranged at both ends of the furnace tube, the furnace tube comprises a carbonization tube, two transition tubes and two groups of plug valves, the two transition tubes are respectively connected to both ends of the carbonization tube, a group of plug valves are arranged between each transition tube and the carbonization tube, and each transition tube is connected to a vacuum pumping device; each feeding and pulling structure comprises a driving member, a sealing plate and a feeding and pulling plate, the driving member is used to drive the sealing plate and the feeding and pulling plate to move independently along the axial direction of the furnace tube, wherein the sealing plate is used to seal the opening of the transition tube, and the feeding and pulling plate is used to extend into the interior of the transition tube to push or support a material boat; by arranging the sealing plate and the plug valve, the transition tubes on both sides can form an independent sealed cavity, cooperate with the vacuum pumping component and the feeding and pulling plate, so that the feeding and unloading process will not destroy the vacuum environment in the carbonization tube, and continuous feeding and unloading can be achieved, which greatly improves the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field related to carbonization furnaces, and in particular to a continuous carbonization furnace. Background Art

[0002] Carbonization furnaces are specialized equipment for high-temperature carbonization of powdered materials (such as carbon powder and carbon niobium). As an important material modification method, carbonization can significantly improve a material's hardness, wear resistance, and corrosion resistance. Therefore, it is widely used in aerospace, automotive, and new energy fields.

[0003] Traditional carbonization equipment is mostly intermittent operation, that is, a certain amount of material is placed into the furnace each time, carbonized and then taken out. This type of equipment has problems such as low production efficiency and difficulty in ensuring consistency of product quality. Summary of the Invention

[0004] Based on this, it is necessary to provide a continuous carbonization furnace with relatively high production efficiency and high product quality consistency to address the problems of low production efficiency and poor product quality consistency in the current intermittent carbonization furnace.

[0005] The present application provides a continuous carbonization furnace, comprising a furnace tube and two sets of material feeding and pulling structures respectively arranged at both ends of the furnace tube.

[0006] The furnace tube includes a carbonizing tube, two transition tubes and two sets of gate valves. The two transition tubes are respectively connected to both ends of the carbonizing tube. A set of gate valves is provided between each transition tube and the carbonizing tube. Each transition tube is connected to a vacuum pump.

[0007] Each of the material feeding and pulling structures includes a driving member, a sealing plate and a material feeding and pulling plate, wherein the driving member is used to drive the sealing plate and the material feeding and pulling plate to move independently along the axial direction of the furnace tube, wherein the sealing plate is used to seal the opening of the transition tube, and the material feeding and pulling plate is used to extend into the interior of the transition tube to push or support the material boat.

[0008] In one embodiment, each of the feeding and pulling structures further includes a first pushing rod and a second pushing rod concentrically sleeved on the outside of the first pushing rod, the sealing plate is fixed to one end of the second pushing rod, the first pushing rod passes through the sealing plate, and the end of the first pushing rod is fixed to the feeding and pulling plate.

[0009] In one embodiment, the continuous carbonization furnace includes four furnace tubes arranged in parallel, each of the feeding and pulling structures includes four groups of feeding and pulling components corresponding to the furnace tubes, each of the feeding and pulling components includes the first pushing rod, the second pushing rod, the sealing plate and the feeding and pulling plate, the driving member includes a first pushing motor and a second pushing motor, the first pushing rods are fixed to each other and are connected to the power of the first pushing motor, and the second pushing rods are fixed to each other and are connected to the power of the second pushing motor.

[0010] In one embodiment, the side where one of the transition tubes is located is the discharge side of the furnace tube, and the feeding and pulling plate located on the discharge side of the furnace tube is a pulling plate, which has a chamfered end close to the furnace tube, and the pulling plate can support the material boat.

[0011] In one embodiment, a cleaning brush is provided on the lower surface of the drawing plate.

[0012] In one embodiment, the pulling plate is provided with a chute running through it in a vertical direction, and the cleaning brush is slidably connected to the inside of the chute and has an initial state and a cleaning state;

[0013] The cleaning brush includes a pressing block and a brush body fixed to the bottom of the pressing block. The pressing block has a chamfered corner on a side close to the furnace tube. The cleaning brush is connected to the inner wall of the chute by an elastic member to limit the cleaning brush to an initial state.

[0014] In the initial state, the pressing block protrudes upward from the upper surface of the pulling plate, and the brush body is completely located inside the chute; in the cleaning state, the pressing block is completely located inside the chute, and the brush body protrudes downward from the lower surface of the pulling plate.

[0015] In one embodiment, the projection of the pulling plate along the axial direction of the furnace tube is arc-shaped, so that the upper surface of the pulling plate can completely fit with the bottom surface of the material boat.

[0016] In one embodiment, the continuous carbonization furnace also includes a material unloading tray arranged between the discharge side of the furnace tube and the feeding and pulling structure, the material unloading tray is used to support the material boat, and a material unloading baffle capable of blocking the material boat in the axial direction is fixed to the end of the material unloading tray away from the furnace tube.

[0017] In one embodiment, each of the transition pipes is also connected to an oxygen content measuring instrument.

[0018] In one embodiment, each of the gate valves is provided with an infrared sensor.

[0019] The above-mentioned continuous carbonization furnace is equipped with sealing plates and plug-in valves so that the transition tubes on both sides can form independent sealed cavities. In conjunction with the vacuum pumping component and the feeding and pulling plate, the plug-in valve is opened after the vacuum pumping in the transition tube is completed, and the plug-in valve is closed again after the material boat is loaded and unloaded through the feeding and pulling plate. In this way, the loading and unloading process will not destroy the vacuum environment in the carbonization tube, and continuous feeding and unloading can be achieved, which greatly improves production efficiency. In addition, each of the above steps can be completed automatically, which greatly reduces manual intervention, so that each material boat can obtain the same processing conditions, effectively improving the consistency of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of the continuous carbonization furnace of this application along the front view direction;

[0021] Figure 2 for Figure 1 An enlarged view of the center feed side feeding and pulling structure;

[0022] Figure 3 for Figure 1 A three-dimensional diagram of the center feed and side feeding and pulling structure;

[0023] Figure 4 for Figure 1 A three-dimensional diagram of the center discharge and side feeding and pulling structure;

[0024] Figure 5 for Figure 4 A stereogram from another angle;

[0025] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 for Figure 6 A cross-sectional view of the middle drawing plate in the initial state along the front direction;

[0027] Figure 8 for Figure 7 Schematic diagram of the pulling plate in a clean state.

[0028] Figure numerals: 100, material boat; 10, furnace tube; 11, carbonization tube; 12, transition tube; 13, plug valve; 20, material feeding and pulling structure; 21, driving member; 211, first pushing motor; 212, second pushing motor; 22, sealing plate; 23, material feeding and pulling plate; 231, material pulling plate; 231a, slide; 232, cleaning brush; 232a, pressure block; 232b, brush body; 24, first pushing rod; 25, second pushing rod; 30, material unloading tray; 31, material unloading baffle. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0035] Please combine Figure 1 、 Figure 2 as well as Figure 3 As shown, the present application provides a continuous carbonization furnace, including a furnace tube 10 and two groups of feeding and pulling structures 20 respectively arranged at both ends of the furnace tube 10, the furnace tube 10 includes a carbonization tube 11, two transition tubes 12 and two groups of plug valves 13, the two transition tubes 12 are respectively connected to the two ends of the carbonization tube 11, and a group of plug valves 13 are arranged between each transition tube 12 and the carbonization tube 11, and each transition tube 12 is connected to a vacuum device; each feeding and pulling structure 20 includes a driving member 21, a sealing plate 22 and a feeding and pulling plate 23, the driving member 21 is used to drive the sealing plate 22 and the feeding and pulling plate 23 to move independently along the axial direction of the furnace tube 10, wherein the sealing plate 22 is used to seal the opening of the transition tube 12, and the feeding and pulling plate 23 is used to extend into the interior of the transition tube 12 to push or support the material boat 100.

[0036] In the present application, by providing a sealing plate 22 and a gate valve 13, the transition tubes 12 on both sides can form an independent sealed cavity. In conjunction with the vacuum pumping assembly and the material feeding and pulling plate 23, the gate valve 13 is opened after the vacuum is completed in the transition tube 12. After the material boat 100 is loaded and unloaded through the material feeding and pulling plate 23, the gate valve 13 is closed again. In this way, the loading and unloading process does not destroy the vacuum environment in the carbonization tube 11, and continuous feeding and unloading can be achieved, which greatly improves production efficiency.

[0037] In addition, each of the above steps can be completed automatically, which greatly reduces manual intervention and enables each material boat 100 to obtain the same processing conditions, effectively improving the consistency of product quality.

[0038] The specific feeding and discharging work flow is as follows:

[0039] The gate valve 13 is in the closed state, and the driving member 21 is started, driving the sealing plate 22 and the feeding and pulling plate 23 to move together until the sealing plate 22 seals the opening of the transition pipe 12. During this process, the feeding and pulling plate 23 on the feed side will push the material boat 100 on the feed tray into the transition pipe 12;

[0040] After the sealing is completed, the vacuum device is started to complete the vacuuming in the transition pipe 12. After the vacuuming is completed, the gate valve 13 is opened, and the driving member 21 is started again to drive the feeding plate 23 to extend into the transition pipe 12.

[0041] The feeding and pulling plate 23 on the feeding side will push the material boat 100 in the corresponding transition tube 12 further into the carbonization tube 11; and the feeding and pulling plate 23 on the discharging side will also move into the corresponding transition tube 12. At the same time, the material boat 100 on the discharging side will move into the transition tube 12 on the discharging side under the squeezing action of the other material boats 100. The two move toward each other until the feeding and pulling plate 23 is inserted into the bottom of the material boat 100 and fully supports the material boat 100.

[0042] After the material boat 100 on the feed side has completely entered the carbonization tube 11 and the material boat 100 on the discharge side has completely entered the transition tube 12, the gate valve 13 is closed, the driving member 21 is started again and drives the sealing plate 22 and the feeding and pulling plate 23 to reset, the sealing plate 22 is unsealed, and the feeding and pulling plate 23 is moved out of the transition tube 12 at the same time.

[0043] Please combine Figure 1 、 Figure 2 as well as Figure 3 As shown, in some embodiments, each feeding and pulling structure 20 also includes a first pushing rod 24 and a second pushing rod 25 concentrically sleeved on the outside of the first pushing rod 24, the sealing plate 22 is fixed to one end of the second pushing rod 25, the first pushing rod 24 passes through the sealing plate 22, and the end of the first pushing rod 24 is fixed to the feeding and pulling plate 23.

[0044] The first push rod 24 and the second push rod 25 are in contact and sealed to prevent external air from entering the transition pipe 12 through the gap between the first push rod 24 and the second push rod 25 after the sealing plate 22 seals the transition pipe 12 .

[0045] Of course, in some other embodiments, the sealing plate 22 and the feed plate 23 can also be connected to the driving member 21 in other ways, as long as the driving member 21 can still drive the feed plate 23 to further extend into the transition pipe 12 after the sealing plate 22 seals the transition pipe 12 without destroying the seal of the transition pipe 12. This application does not give examples one by one here.

[0046] Please combine Figure 2 、 Figure 3 as well as Figure 4As shown, in some embodiments, the continuous carbonization furnace includes four parallel furnace tubes 10, each feeding and pulling structure 20 includes four groups of feeding and pulling components corresponding to the furnace tubes 10, each feeding and pulling component includes a first pushing rod 24, a second pushing rod 25, a sealing plate 22 and a feeding and pulling plate 23, the driving member 21 includes a first pushing motor 211 and a second pushing motor 212, each first pushing rod 24 is fixed to each other and is connected to the first pushing motor 211, and each second pushing rod 25 is fixed to each other and is connected to the second pushing motor 212.

[0047] The first pushing motor 211 and the second pushing motor 212 in the feeding and pulling structure 20 can drive the four groups of feeding and pulling components to operate synchronously, so that the four furnace tubes 10 can realize continuous feeding and discharging synchronously. The parallel processing design of the four furnace tubes 10 cooperates with the continuous feeding and discharging, further improving the production efficiency and shortening the production cycle, so that more materials can be processed per unit time, thereby meeting the needs of large-scale production.

[0048] Of course, the continuous carbonization furnace can also use other numbers of furnace tubes 10 according to actual production needs, and this application does not give examples one by one here.

[0049] Please combine Figure 4 、 Figure 5 as well as Figure 6 As shown, in some embodiments, the side where one of the transition tubes 12 is located is the discharge side of the furnace tube 10, and the feeding and pulling plate 23 located on the discharge side of the furnace tube 10 is a pulling plate 231. The pulling plate 231 has a chamfer near one end of the furnace tube 10, and the pulling plate 231 can support the material boat 100.

[0050] The chamfer can play a guiding role, so that the material boat 100 can be moved to the upper side of the pulling plate 231 through the chamfer under the pressure of other material boats 100.

[0051] Please combine Figure 7 as well as Figure 8 As shown, in some embodiments, a cleaning brush 232 is provided on the lower surface of the pulling plate 231. The cleaning brush 232 can automatically clean the inner wall of the transition tube 12 during the extension and retraction of the pulling plate 231. While reducing manual intervention, the cleaning brush 232 can automatically brush away graphite dust attached to the inner wall of the transition tube 12 to prevent the equipment from being blocked after long-term operation.

[0052] Please combine Figure 7 as well as Figure 8As shown, in some embodiments, the pulling plate 231 is provided with a chute 231a extending vertically therethrough, and the cleaning brush 232 is slidably connected to the interior of the chute 231a and has an initial state and a cleaning state; the cleaning brush 232 includes a pressing block 232a and a brush body 232b fixed to the bottom of the pressing block 232a, and the pressing block 232a has a chamfered side close to the furnace tube 10, and an elastic member is connected to the inner wall of the chute 231a to limit the cleaning brush 232 to the initial state;

[0053] In the initial state, the pressing block 232a protrudes upward from the upper surface of the pulling plate 231, and the brush body 232b is completely located inside the slide groove 231a; in the cleaning state, the pressing block 232a is completely located inside the slide groove 231a, and the brush body 232b protrudes downward from the lower surface of the pulling plate 231.

[0054] With this arrangement, when the pulling plate 231 is extended into the transition tube 12, the cleaning brush 232 is in the initial state under the action of the elastic member. At this time, the brush body 232b does not contact the inner wall of the transition tube 12, thereby preventing the brush body 232b from sweeping graphite dust deeper into the transition tube 12.

[0055] When the material boat 100 moves to the pulling plate 231 under the pressure of other material boats 100, the material boat 100 squeezes the pressing block 232a through the chamfer, so that the cleaning brush 232 overcomes the elastic force of the elastic part and moves to the cleaning state. At this time, the brush body 232b extends downward to contact the inner wall of the transition tube 12. As the pulling plate 231 moves outward, the brush body 232b can sweep out the graphite dust attached to the inner wall of the transition tube 12, thereby effectively avoiding blockage.

[0056] Please combine Figure 5 as well as Figure 6 As shown, in some embodiments, the projection of the pulling plate 231 along the axial direction of the furnace tube 10 is arc-shaped, so that the upper surface of the pulling plate 231 can completely fit with the bottom surface of the material boat 100, thereby increasing the bearing stability of the pulling plate 231 on the material boat 100.

[0057] Please combine Figure 5 as well as Figure 6 As shown, in some embodiments, the continuous carbonization furnace also includes a discharge tray 30 arranged between the discharge side of the furnace tube 10 and the feeding and pulling structure 20, the discharge tray 30 is used to support the material boat 100, and the discharge tray 30 is fixed with a discharge baffle 31 at one end away from the furnace tube 10, which can block the material boat 100 in the axial direction; as the pulling plate 231 moves outward, the material boat 100 will be against the discharge baffle 31, and the pulling plate 231 will further move outward and reset, and the material boat 100 will stay on the discharge tray 30, waiting for the next step of feeding.

[0058] In some embodiments, each transition pipe 12 is also connected to an oxygen content measuring instrument, which is used to detect the vacuum state in the transition pipe 12 to ensure that the transition pipe 12 is in a vacuum state each time material is loaded and unloaded.

[0059] In some embodiments, each gate valve 13 is provided with an infrared sensor for detecting the movement progress of the boat 100 , so as to control the gate valve 13 to open or close after detecting that the boat 100 has moved to a corresponding position.

[0060] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A continuous carbonization furnace, characterized in that: It comprises a furnace tube (10) and two groups of material feeding and pulling structures (20) respectively arranged at two ends of the furnace tube (10). The furnace tube (10) comprises a carbonizing tube (11), two transition tubes (12) and two groups of gate valves (13), the two transition tubes (12) being connected to two ends of the carbonizing tube (11) respectively, a group of gate valves (13) being arranged between each transition tube (12) and the carbonizing tube (11), and each transition tube (12) being connected to a vacuum pumping device; Each of the material feeding and pulling structures (20) comprises a driving member (21), a sealing plate (22) and a material feeding and pulling plate (23), wherein the driving member (21) is used to drive the sealing plate (22) and the material feeding and pulling plate (23) to independently move along the axial direction of the furnace tube (10), wherein the sealing plate (22) is used to seal the opening of the transition tube (12), and the material feeding and pulling plate (23) is used to extend into the interior of the transition tube (12) to push or support the material boat (100); Each of the material feeding and pulling structures (20) further comprises a first pushing rod (24) and a second pushing rod (25) coaxially sleeved on the outside of the first pushing rod (24); the sealing plate (22) is fixed to one end of the second pushing rod (25); the first pushing rod (24) passes through the sealing plate (22); and the end of the first pushing rod (24) is fixed to the material feeding and pulling plate (23).

2. The continuous carbonization furnace according to claim 1, characterized in that: The continuous carbonization furnace comprises four furnace tubes (10) arranged in parallel, each of the feeding and pulling structures (20) comprises four groups of feeding and pulling components corresponding to the furnace tubes (10), each of the feeding and pulling components comprises the first pushing rod (24), the second pushing rod (25), the sealing plate (22) and the feeding and pulling plate (23), the driving member (21) comprises a first pushing motor (211) and a second pushing motor (212), each of the first pushing rods (24) is fixed to each other and is connected to the first pushing motor (211) by power, and each of the second pushing rods (25) is fixed to each other and is connected to the second pushing motor (212) by power.

3. The continuous carbonization furnace according to claim 1, characterized in that: The side where one of the transition tubes (12) is located is the discharge side of the furnace tube (10), and the material feeding and pulling plate (23) located on the discharge side of the furnace tube (10) is a material pulling plate (231), and the material pulling plate (231) has a chamfer at one end close to the furnace tube (10), and the material pulling plate (231) can support the material boat (100).

4. The continuous carbonization furnace according to claim 3, characterized in that: A cleaning brush (232) is provided on the lower surface of the pulling plate (231).

5. The continuous carbonization furnace according to claim 4, characterized in that: The pulling plate (231) is provided with a sliding groove (231a) extending through it in a vertical direction, and the cleaning brush (232) is slidably connected inside the sliding groove (231a) and has an initial state and a cleaning state; The cleaning brush (232) comprises a pressing block (232a) and a brush body (232b) fixed to the bottom of the pressing block (232a); the pressing block (232a) has a chamfer on one side close to the furnace tube (10); and an elastic member is connected between the cleaning brush (232) and the inner wall of the slide groove (231a) to restrict the cleaning brush (232) to an initial state; In the initial state, the pressing block (232a) protrudes upward from the upper surface of the pulling plate (231), and the brush body (232b) is completely located inside the slide groove (231a); in the cleaning state, the pressing block (232a) is completely located inside the slide groove (231a), and the brush body (232b) protrudes downward from the lower surface of the pulling plate (231).

6. The continuous carbonization furnace according to claim 3, characterized in that: The projection of the material pulling plate (231) along the axial direction of the furnace tube (10) is arc-shaped, so that the upper surface of the material pulling plate (231) can be completely fitted with the bottom surface of the material boat (100).

7. The continuous carbonization furnace according to claim 3, characterized in that: The continuous carbonization furnace further comprises a material unloading tray (30) arranged between the material discharge side of the furnace tube (10) and the material feeding and pulling structure (20), wherein the material unloading tray (30) is used to support the material boat (100), and a material unloading baffle (31) capable of blocking the material boat (100) in the axial direction is fixed to one end of the material unloading tray (30) away from the furnace tube (10).

8. The continuous carbonization furnace according to claim 1, characterized in that: Each of the transition pipes (12) is also connected to an oxygen content measuring instrument.

9. The continuous carbonization furnace according to claim 1, characterized in that: Each of the gate valves (13) is provided with an infrared sensor.

Images