Graphitization box type furnace charge box

Abstract

The utility model discloses a graphitized box-type furnace charge box which comprises a stuffing box, wherein the stuffing box is defined by a bottom graphite plate and a vertically upward peripheral graphite plate, is provided with an opening at the top and is provided with a cuboid accommodating cavity; a plurality of graphite partition plates which are evenly distributed at intervals, perpendicular to the bottom graphite plate and divide the containing cavity into a plurality of independent working chambers are installed in the containing cavity, and the top of each working chamber is provided with a graphite cover plate which is supported on the top wall of the stuffing box and can seal an inner cavity of the stuffing box. The bottom graphite plate is connected with heating core rods which are made of graphite and are uniformly distributed at intervals vertically upwards to the graphite cover plate, and the heating core rods are fully distributed in an inner cavity of the working chamber; the problems that the heating core rods are bent, deformed and even broken due to the pressure of materials in the material box on the heating core rods or the heating core rods which are connected in series cannot be in close contact at the connector position to cause poor electric conduction are solved, and the heating effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of graphitization furnaces, in particular to a graphitization box-type furnace charge box. Background Art

[0002] A box-type furnace is a type of graphitization furnace that uses graphite plates to form a box as the furnace core material box. It can be used to produce negative electrode graphite materials for lithium batteries. Because the graphite plates are conductive, they generate heat when powered. The material box can also heat the material while serving as a container for the negative electrode material. To address the different thermal fields in the material box caused by different distances from the graphite plates, heating core rods can be evenly spaced inside the material box to ensure a consistent thermal field inside and outside the material box. Patent CN219264979 uses several spliced ​​heating core rods that extend horizontally through the furnace head and tail to heat the material inside the material box. However, there are problems with the heating core rods being bent or broken when the material is filled into the material box. Moreover, the pressure increases when power is supplied, causing the material to sink and shift due to shrinkage. As a result, the heating core rods cannot be in close contact at the splicing interface, affecting conductivity. This leads to large temperature differences in different areas of the thermal field distribution, uneven heating of the material, and poor quality of the negative electrode graphite material produced. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model proposes a graphitization box-type furnace charge box.

[0004] The utility model proposes a graphitization box-type furnace charge box, comprising: a stuffing box with a top opening and a rectangular receiving cavity surrounded by a bottom graphite plate and vertically upward graphite plates on all sides; a plurality of graphite partitions evenly spaced and perpendicular to the bottom graphite plate are installed in the receiving cavity to divide the receiving cavity into a plurality of separate working rooms; a graphite cover plate supported on the top wall of the stuffing box and capable of sealing the inner cavity is arranged on the top of each working room; and heating core rods made of graphite material are connected to the bottom graphite plate and vertically upward to the graphite cover plate and are evenly spaced and distributed throughout the inner cavity of the working room.

[0005] Preferably, a connecting thread is provided on the outer peripheral wall of the bottom of the heating core rod, and a first connecting through hole with an internal thread into which the bottom of the heating core rod can be screwed is provided on the bottom graphite plate.

[0006] Preferably, the periphery of the graphite cover plate can be snapped onto the top wall of the stuffing box, and connecting grooves parallel to the axis of the heating core rod are evenly opened on the outer peripheral wall of the top of the heating core rod. The graphite cover plate is provided with a second connecting through hole with an inner wall having a connecting block adapted to the connecting groove, so that the top of the heating core rod can be tightly inserted therein.

[0007] Preferably, the heating core rod is a cylindrical graphite rod impregnated with an impregnating agent such as polytetrafluoroethylene or epoxy resin.

[0008] Preferably, the bottom graphite plate is connected to the four sides with evenly spaced vertical graphite columns, and the sides of the graphite columns are provided with a plurality of vertical slots, and multiple layers of graphite plates are closely stacked and inserted into the slots to form the surrounding graphite plates and graphite partitions.

[0009] Preferably, a plurality of reinforcing ribs are provided on the outer peripheral wall of the heating core rod, and when the heating core rod is connected to the bottom graphite plate, the lower surface can abut against the upper surface of the bottom graphite plate.

[0010] Preferably, a circumferential boss is provided in the middle position of the heating core rod in the height direction, and a reinforcing plate is placed on the horizontal upper annular surface of the circumferential boss. A sleeve is provided on the reinforcing plate, which is adapted to the circumferential boss and can be mounted on the heating core rod. Horizontal supporting ribs are connected between adjacent sleeves and between the outer sleeves and the inner surfaces of the surrounding graphite plates and graphite partitions. The reinforcing plate is an integrally formed graphite plate.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] Since the heating core rod is placed vertically in the stuffing box, it is almost free from the pressure of the material in the stuffing box, so it can maintain its rigidity and strength, and will not be bent or even broken, and the problem of poor contact of the joints and thus the lack of conductivity caused by this is avoided. Its resistance heating performance and the uniformity of the heat field distribution in the stuffing box are ensured, thereby improving the working reliability of the graphitization box furnace.

[0013] By clamping the top of the heating core rod into the graphite cover plate, the heating core rod can be further limited and fixed so that it remains in a vertical position without tilting.

[0014] The reinforcing plate can further improve the rigidity of the heating core rod, prevent it from tilting, enable it to be well powered and heated, ensure the uniformity of the heat field distribution in the material box, and enhance the working reliability of the graphitization box furnace material box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the graphitization box-type furnace charge box from a top view.

[0016] Figure 2 for Figure 1 Section view in the AA direction.

[0017] Figure 3 It is a front view of a separate working chamber of a graphitization box-type furnace.

[0018] Figure 4 This is a top view of the graphite cover of the graphitization box furnace charge box.

[0019] Figure 5This is a top view of the reinforcement plate of the graphitization box furnace charge box. DETAILED DESCRIPTION

[0020] The specific implementation of the graphitization box-type furnace charge box proposed by the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 1 to 5 The graphitization box-type furnace charge box includes: a stuffing box with a rectangular receiving cavity with an open top, which is surrounded by a bottom graphite plate 1 and vertically upward graphite plates 2 on all sides; a plurality of graphite partitions 3 evenly spaced and perpendicular to the bottom graphite plate 1 are installed in the receiving cavity to divide the receiving cavity into multiple separate working rooms; a graphite cover plate 4 supported on the top wall of the stuffing box and capable of sealing its inner cavity is arranged on the top of each working room; a heating core rod 5 made of graphite material is connected to the bottom graphite plate 1 and vertically upward to the graphite cover plate 4 and evenly spaced and covering the inner cavity of the working room.

[0022] The working principle of the graphitization box-type furnace charge box is as follows: first, materials such as the negative electrode of lithium batteries to be graphitized by high-temperature heating are put into each working room of the stuffing box through the top opening, and then the graphite cover plate 4 is placed on the top of each working room, and insulation material is laid on the graphite cover plate 4. Then the power supply can be connected, and the bottom graphite plate 1, the surrounding graphite plates 2, the graphite separator 3, the graphite cover plate 4, and the heating core rod 5 are all used as heating resistors to heat the outside and inside of the material in the stuffing box at high temperature at the same time, reducing the temperature difference of the thermal field distribution, ensuring the uniformity of graphitization, and improving the processing effect.

[0023] Since the heating core rod 5 is placed vertically in the stuffing box, it is almost free from the pressure of the material in the stuffing box, so it can maintain its rigidity and strength, and will not be bent or even broken, and the problem of poor contact of the joint and thus failure to conduct electricity caused by this is avoided. Its resistance heating performance and the uniformity of the heat field distribution in the material box are ensured, thereby improving the working reliability of the graphitization box furnace material box.

[0024] Reference Figure 2 A connecting thread 51 is provided on the outer peripheral wall of the bottom of the heating core rod 5, and a first connecting through hole 11 with an internal thread is provided on the bottom graphite plate 1, into which the bottom of the heating core rod 5 can be screwed. The heating core rod 5 can be firmly connected to the bottom graphite plate 1 by using a threaded connection method, thereby ensuring the working reliability of the heating core rod 5.

[0025] Reference Figure 2 、 Figure 4The periphery of the graphite cover plate 4 can be snapped onto the top wall of the stuffing box, and connecting grooves 52 parallel to the axis of the heating core rod 5 are evenly opened on the outer peripheral wall of the top. The graphite cover plate 4 is provided with a second connecting through hole 41 with a connecting block 411 adapted to the connecting groove 52 on the inner wall, so that the top of the heating core rod 5 can be tightly inserted into it. By snapping the top of the heating core rod 5 into the graphite cover plate 4, the heating core rod 5 can be further limited and fixed so that it remains in a vertical position without tilting.

[0026] The heating core rod 5 is a cylindrical graphite rod that has been impregnated with an impregnant such as polytetrafluoroethylene or epoxy resin, so that the heating core rod 5 has good mechanical strength, thermal stability and corrosion resistance.

[0027] Reference Figure 3 The bottom graphite plate 1 is connected to the four sides with evenly spaced graphite columns 6 pointing upward in the vertical direction. The side of the graphite column 6 is provided with a number of vertical slots 61. Multiple layers of graphite plates 7 are tightly stacked and inserted into the slots 61 to form the surrounding graphite plates 2 and graphite separators 3. The spliced ​​structural design makes it easy to build and dismantle the material box in the furnace wall, and it is convenient to load and unload the negative electrode material.

[0028] Reference Figure 2 The outer peripheral wall of the heating core rod 5 is provided with a plurality of reinforcing ribs 53, the lower surface of which can abut against the upper surface of the bottom graphite plate 1 when the heating core rod 5 is connected to the bottom graphite plate 1, thereby strengthening the connection strength between the heating core rod 5 and the bottom graphite plate 1.

[0029] Reference Figure 2 、 Figure 5 A circumferential boss 54 is provided at the middle position of the heating core rod 5 in the height direction, and a reinforcing plate 8 is placed on the horizontal upper annular surface of the circumferential boss 54. The reinforcing plate 8 is provided with a sleeve 81 that is adapted to the circumferential boss 54 and can be sleeved on the heating core rod 5. Horizontal supporting ribs 82 are connected between adjacent sleeves 81 and between the outer sleeves 81 and the inner surfaces of the surrounding graphite plates 2 and graphite partitions 3. The reinforcing plate 8 is an integrally formed graphite plate. The reinforcing plate 8 can further improve the rigidity of the heating core rod 5 and prevent it from tilting, so that it can be well powered on and heated, thereby ensuring the uniformity of the heat field distribution in the material box and enhancing the working reliability of the material box of the graphitization box furnace.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A graphitization box-type furnace charge box, characterized in that, The invention comprises: a stuffing box with a rectangular receiving chamber and a top opening formed by a bottom graphite plate (1) and four vertically extending graphite plates (2) on all sides; a plurality of graphite partitions (3) evenly spaced and perpendicular to the bottom graphite plate (1) are installed in the receiving chamber to divide the receiving chamber into a plurality of separate working chambers; each working chamber is provided with a graphite cover plate (4) supported on the top wall of the stuffing box and capable of sealing the inner chamber; a heating core rod (5) made of graphite material is connected to the bottom graphite plate (1) and evenly spaced and extending vertically upward to the graphite cover plate (4) to cover the inner chamber of the working chamber.

2. The graphitization box-type furnace charge box according to claim 1, characterized in that: A connecting thread (51) is provided on the outer peripheral wall of the bottom of the heating core rod (5), and a first connecting through hole (11) with an internal thread into which the bottom of the heating core rod (5) can be screwed is provided on the bottom graphite plate (1).

3. The graphitization box-type furnace charge box according to claim 1, characterized in that: The periphery of the graphite cover plate (4) can be snap-fitted to the top wall of the stuffing box; the top outer peripheral wall of the heating core rod (5) is evenly provided with connecting slots (52) parallel to its axis; the graphite cover plate (4) is provided with a second connecting through hole (41) with a connecting block (411) on the inner wall adapted to the connecting slot (52) so that the top of the heating core rod (5) can be tightly inserted therein.

4. The graphitization box-type furnace charge box according to claim 1, characterized in that: The heating core rod (5) is a cylindrical graphite rod impregnated with polytetrafluoroethylene or epoxy resin impregnating agent.

5. The graphitization box-type furnace charge box according to claim 1, characterized in that: The bottom graphite plate (1) is connected to the periphery thereof with evenly spaced graphite columns (6) extending vertically upward. The side surfaces of the graphite columns (6) are provided with a plurality of vertical slots (61). Multiple layers of graphite plates (7) are closely stacked and inserted into the slots (61) to form the graphite plates (2) and graphite partitions (3) on the periphery thereof.

6. The graphitization box-type furnace charge box according to claim 1, characterized in that: A plurality of reinforcing ribs (53) are provided on the outer peripheral wall of the heating core rod (5), the lower surface of which can abut against the upper surface of the bottom graphite plate (1) when the heating core rod (5) is connected to the bottom graphite plate (1).

7. The graphitization box-type furnace charge box according to claim 1, characterized in that: The heating core rod (5) is provided with a circumferential boss (54) at the middle position in the height direction, and a reinforcing plate (8) is placed on the horizontal upper annular surface of the circumferential boss (54). The reinforcing plate (8) is provided with a sleeve (81) that is compatible with the circumferential boss (54) and can be mounted on the heating core rod (5). Horizontal supporting ribs (82) are connected between adjacent sleeves (81) and between the outer sleeves (81) and the inner surfaces of the surrounding graphite plates (2) and the graphite partitions (3). The reinforcing plate (8) is an integrally formed graphite plate.

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