Graphitization crucible charging system

Abstract

The utility model discloses a graphitization crucible charging system, and belongs to the field of cathode material graphitization. A degassing fan is arranged outside a spiral outer sleeve, is communicated to an inner cavity of the spiral outer sleeve through a pipeline, and is used for exhausting and degassing materials in the spiral outer sleeve; an anti-overflow net is further arranged between the spiral outer sleeve and the feeding spiral and used for enclosing materials inside, and the materials are prevented from entering the degassing fan. According to the utility model, the material filling density can be effectively improved, so that the filling quantity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of graphitization of negative electrode materials, and more specifically to a graphitization crucible charging system. Background Art

[0002] The graphitized negative electrode material loading process is to load the pre-carbonized negative electrode material into a graphite crucible before Acheson graphitization, which is an important process in the process of artificial graphite negative electrode material.

[0003] The traditional crucible loading process is to manually load the pre-carbonized negative electrode material into the graphite crucible, which is inefficient, has a low loading volume, and is prone to dust pollution, which poses a hazard to the operator's job. How to increase the loading volume of the graphite crucible and improve production efficiency is of great significance to production practice.

[0004] After searching, the patent with publication number CN218465032U discloses a mobile graphitization crucible material level measurement system, which adopts a spiral loader to load the material, and sets a material level meter at the discharge port. The case detects the material layer height of the graphite crucible in real time through the material level meter, so that the feeding speed of the spiral loader can be automatically adjusted, which helps to increase the filling amount of the graphite crucible. In practice, there is still room for further optimization of this case. Utility Model Content

[0005] 1. Technical problems to be solved by the utility model

[0006] In view of the fact that the loading capacity of graphite crucibles in the prior art still needs to be improved, the utility model intends to provide a graphitized crucible loading system, which can further increase the loading capacity of the graphite crucible and improve production efficiency.

[0007] 2. Technical solution

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0009] The utility model discloses a graphitizing crucible charging system, comprising a spiral feeder, which is driven by a spiral feeding motor. A feeding spiral is arranged inside the spiral feeder, a spiral outer sleeve is arranged on the periphery of the feeding spiral, a degassing fan is arranged outside the spiral outer sleeve, the degassing fan is connected to the inner cavity of the spiral outer sleeve through a pipeline, and is used for exhausting and degassing the material inside the spiral outer sleeve; an anti-overflow net is also arranged between the spiral outer sleeve and the feeding spiral, and the anti-overflow net is used for enclosing the material inside to prevent it from entering the degassing fan.

[0010] Furthermore, the anti-overflow net adopts a micron metal sintered mesh.

[0011] Furthermore, a back-blowing solenoid valve is provided near the discharge port of the spiral outer sleeve, and the back-blowing solenoid valve is used to blow into the spiral outer sleeve.

[0012] Furthermore, a pressure plate is circumferentially arranged on the outer side of the bottom end of the spiral outer sleeve, and the pressure plate is substantially flush with the discharge port of the spiral outer sleeve in the horizontal direction. The pressure plate is used to cooperate with and cover the upper part of the inner cavity of the crucible.

[0013] Furthermore, the pressure plate adopts a conical plate structure, and its opening gradually increases from top to bottom.

[0014] Furthermore, a sealing cover is movably connected to the outer side of the spiral outer sleeve, and the sealing cover is used to always cover the crucible.

[0015] Furthermore, it also includes a dust collector, which is connected to the inside of the sealing cover through a pipeline.

[0016] Furthermore, it also includes a servo lifting structure, which is connected to the screw feeder and is used to drive the overall lifting of the screw feeder.

[0017] Furthermore, both the screw feed motor and the degassing fan adopt variable frequency controlled motors.

[0018] Furthermore, it also includes a controller and a touch screen. The spiral feeding motor, the degassing fan, the servo lifting structure, the dust collector, and the back-blowing solenoid valve are electrically connected to the controller respectively, and the touch screen is used to display the system operating parameters.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0021] (1) The loading system of the utility model can effectively suck the air between the materials through the degassing fan, effectively increasing the material filling density, thereby increasing the filling volume. At the same time, an anti-overflow net is provided to prevent the material from being sucked away and emptied by the degassing fan, thereby improving production efficiency.

[0022] (2) The loading system of the utility model is provided with a back-blowing solenoid valve near the discharge port, which can prevent the material from being too compacted on the feeding screw and difficult to completely disengage, facilitates rapid and timely discharge, and effectively solves the problem of feeding screw blockage.

[0023] (3) The charging system of the utility model is also provided with a pressure plate cover at the top of the crucible at the discharge port, which can effectively prevent the material from overflowing during the spiral charging and increase the filling capacity of the spiral charging.

[0024] (4) The loading system of the utility model can effectively prevent dust from being raised during material dropping by providing a sealing cover and a dust collector, thereby avoiding dust pollution, improving the cleanliness of the equipment operating environment, and effectively solving the problem of dust raised during loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the charging system in the embodiment;

[0026] Figure 2 Schematic diagram of the control system of the charging system in the embodiment.

[0027] Explanation of the symbols in the schematic diagram:

[0028] 1. Screw feeding motor; 2. Feeding screw; 3. Degassing fan; 4. Servo lifting structure; 5. Dust collector; 6. Back-blowing solenoid valve; 7. Anti-overflow net; 8. Spiral outer sleeve; 9. Sealing cover; 10. Pressure plate; 11. Crucible; 12. Controller; 13. Touch screen. DETAILED DESCRIPTION

[0029] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] The utility model is further described below in conjunction with embodiments.

[0032] Example

[0033] Combination Figure 1 and Figure 2 As shown, a graphitized crucible charging system of this embodiment includes a screw feeder, which is driven by a screw feeding motor 1. The screw feeder has a feeding screw 2 inside, and a spiral outer sleeve 8 is provided on the outer periphery of the feeding screw 2. The screw feeder can be vertically installed above the crucible 11, and the material is pre-extruded by a spiral conveying method to increase the material loading amount. In this embodiment, a degassing fan 3 is provided outside the spiral outer sleeve 8, and the degassing fan 3 is connected to the inner cavity of the spiral outer sleeve 8 through a pipeline, which is used to exhaust and degas the material inside the spiral outer sleeve 8; an anti-overflow net 7 is also provided between the spiral outer sleeve 8 and the feeding screw 2, and the anti-overflow net 7 is used to enclose the material inside to prevent it from entering the degassing fan 3. Specifically, the anti-overflow net 7 can be made of a micron metal sintered net, which effectively prevents the internal material from being sucked away and emptied by the degassing fan 3 during the degassing process.

[0034] In order to avoid the clogging of the spiral feeder, in practice, it is further preferred to provide a back-blowing solenoid valve 6 near the discharge port of the spiral outer sleeve 8, and the back-blowing solenoid valve 6 is used to purge the spiral outer sleeve 8, so that the compacted and squeezed materials can be more easily separated and downwardly enter the crucible 11. The back-blowing solenoid valve 6 is preferably arranged at the middle and lower part of the spiral outer sleeve 8.

[0035] The dust problem during the charging process has always been a problem that cannot be ignored in practice. The present application further optimizes the dust problem on the basis of increasing the charging amount. Furthermore, a pressure plate 10 is provided around the outer side of the bottom end of the spiral outer sleeve 8 along the circumferential direction. The pressure plate 10 is substantially flush with the discharge port of the spiral outer sleeve 8 in the horizontal direction. The pressure plate 10 is used to cover the upper part of the inner cavity of the crucible 11. Furthermore, the pressure plate 10 preferably adopts a conical plate structure, and its opening gradually increases from top to bottom. When discharging, the pressure plate 10 covers the top of the crucible 11, and the outer edge of the pressure plate 10 is substantially close to the inner wall of the crucible 11, which helps to alleviate the situation of material overflow when the feeding screw 2 is charged and extruded, thereby reducing dust.

[0036] Furthermore, a sealing cover 9 is movably connected to the outer side of the spiral outer sleeve 8, and the sealing cover 9 is used to always cover the crucible 11, and the pressure plate 10 is always covered inside the sealing cover 9. In coordination, the charging system also includes a dust collector 5, and the dust collector 5 is connected to the inside of the sealing cover 9 through a pipeline. The sealing cover 9 can be made of a material with a certain elasticity. In the process of discharging, even if some materials overflow, they can be further restricted in the sealing cover 9 and further processed by the dust collector 5 to avoid overflowing into the external open space, effectively improving the on-site operating environment of the operators.

[0037] In practice, the charging system also includes a servo lifting structure 4, which is connected to the screw feeder and is used to drive the overall lifting of the screw feeder. The servo lifting structure 4 can adopt a variety of lifting power methods in the prior art, such as electric push rods, lifting cylinders, lifting hydraulic cylinders, etc., which will not be repeated here. When the servo lifting structure 4 drives the overall lifting of the screw feeder, the sealing cover 9 will always be covered above the crucible 11 to avoid dust. The servo control method can accurately control the lifting height and lifting speed, and improve the positioning accuracy of the spiral device and the charging height.

[0038] Furthermore, in practice, both the spiral feeding motor 1 and the degassing fan 3 use frequency conversion controlled motors. The spiral feeding motor 1 uses frequency conversion control to adjust the speed of the spiral discharging, control the extrusion current during feeding, and thus adjust the charging amount. The degassing fan 3 uses a frequency conversion controlled motor, which can achieve low-frequency degassing during the loading process and high-frequency locking during the standby process. The charging system also includes a controller 12 and a touch screen 13. The spiral feeding motor 1, the degassing fan 3, the servo lifting structure 4, the dust collector 5, the back-blowing solenoid valve 6, and the touch screen 13 are electrically connected to the controller 12 respectively, and the touch screen 13 is used to display the system operation parameters. Specifically, the controller 12 controls the start and stop of the spiral feeding motor 1 according to the real-time positioning of the servo lifting structure 4 and the current feedback of the spiral feeding motor 1, and can adjust the working frequency of the spiral feeding motor 1. The controller 12 can position and lift according to the position of the servo lifting structure 4, and can display the current of the spiral feeding motor 1 and set the current limit value of the spiral feeding motor 1 on the touch screen 13, so as to realize the start and stop of the spiral feeding motor 1. During the loading process, the controller 12 controls the start and stop of the degassing fan 3 to realize material degassing, and controls the start and stop of the dust collector 5 to reduce the dust effect during the loading process. The initial feeding speed of the spiral feeding motor 1, the extrusion current of the spiral feeding motor 1 during loading, the height and lifting speed of the servo lifting structure 4, the loading time parameters, etc. can be set on the touch screen 13. At the same time, the actual speed and operating status of the spiral feeding motor 1; the actual height, speed and real-time operating status of the servo lifting structure 4; the current size of the spiral feeding motor 1 during loading operation, etc. can be displayed on the touch screen 13.

[0039] The specific use process of the mobile graphitizing crucible charging system of this embodiment is as follows:

[0040] S1: After the controller 12 is powered on, the charging frequency of the spiral feeding motor 1, the charging operation current limit value of the spiral feeding motor 1, the frequency adjustment value of the spiral feeding motor 1, the descending position and speed of the servo lifting structure 4, the ascending position and speed of the servo lifting structure 4, and the frequency parameters of the degassing fan 3 are set on the touch screen 13.

[0041] S2: After all the above parameters are set, the controller 12 enters a working waiting state. When the controller 12 receives a start command, the controller 12 enters a working running state and runs according to a predetermined automatic control program.

[0042] S3: After the crucible 11 is ready, the controller 12 sends a signal to the servo lifting mechanism 4 to run to the loading position. The servo lifting mechanism 4 controls the screw feeder to descend to the specified loading position. The controller 12 receives the feedback signal from the servo lifting mechanism 4 and starts the dust collector 5.

[0043] S4: The degassing fan 3 is switched to the low-frequency operation mode, and after the back-blowing solenoid valve 6 blows for 2S, the screw feeding motor 1 is started.

[0044] S5: When it is detected during the loading process that the current of the screw feeder motor 1 reaches the limit setting value, the controller 12 receives the signal and the servo lifting mechanism 4 starts to control the screw feeder to rise.

[0045] S6: After the servo lifting mechanism 4 controls the screw feeder to rise to the designated position of the crucible opening, the screw feeder motor 1 continues feeding.

[0046] S7: When the loading operation current of the screw feeding motor 1 exceeds the set limit value and the loading time is up, the screw feeding motor 1 is stopped and the degassing fan 3 is switched to high frequency operation.

[0047] S8: When the degassing fan 3 stops, the servo lifting mechanism 4 controls the screw feeder to rise to the original position about 100 mm above the crucible mouth, closes the dust collector 5, and completes a loading process.

[0048] Compared with the traditional graphitized crucible charging, the present invention detects the current of the screw feeding motor 1 in real time during the spiral charging process, automatically controls the charging speed and start and stop of the screw feeding motor 1 through the current feedback signal of the screw feeding motor 1 during the charging operation, indirectly detects the filling density of the material in the crucible 11 in real time, and controls the charging speed, thereby realizing the automated operation of the graphitized crucible charging and improving the crucible filling rate; and adopts the servo lifting mechanism 4 to control the screw feeder to move up and down, and starts the initial charging from the lower middle part of the crucible 11 while rising slowly, which can improve the filling rate of the charging on the one hand, and reduce the height of the falling material and reduce dust on the other hand.

[0049] The above is a schematic description of the present invention and its implementation methods, which is not restrictive and is only one of the implementation methods of the present invention, and is not actually limited to this. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A graphitizing crucible charging system, comprising a screw feeder, the screw feeder being driven by a screw feeder motor (1), the screw feeder having a feeding screw (2) therein, the feeding screw (2) being provided with a spiral outer sleeve (8) on its outer periphery, characterized in that: A degassing fan (3) is provided outside the spiral outer sleeve (8), and the degassing fan (3) is connected to the inner cavity of the spiral outer sleeve (8) through a pipeline, and is used to exhaust and degas the material inside the spiral outer sleeve (8); an anti-overflow net (7) is also provided between the spiral outer sleeve (8) and the feeding spiral (2), and the anti-overflow net (7) is used to enclose the material inside to prevent it from entering the degassing fan (3).

2. A graphitized crucible charging system according to claim 1, characterized in that: The anti-overflow net (7) is a micron metal sintered net.

3. The graphitized crucible charging system according to claim 1, characterized in that: A back-blowing electromagnetic valve (6) is arranged near the discharge port of the spiral outer sleeve (8), and the back-blowing electromagnetic valve (6) is used for blowing into the spiral outer sleeve (8).

4. The graphitized crucible charging system according to claim 1, characterized in that: A pressure plate (10) is provided around the outer side of the bottom end of the spiral outer sleeve (8) in the circumferential direction. The pressure plate (10) is substantially flush with the discharge port of the spiral outer sleeve (8) in the horizontal direction. The pressure plate (10) is used to fit and cover the upper part of the inner cavity of the crucible (11).

5. A graphitized crucible charging system according to claim 4, characterized in that: The pressure plate (10) adopts a conical plate structure, and its opening gradually increases from top to bottom.

6. The graphitized crucible charging system according to claim 1, characterized in that: A sealing cover (9) is movably connected to the outer side of the spiral outer sleeve (8), and the sealing cover (9) is used to always cover the crucible (11).

7. A graphitized crucible charging system according to claim 6, characterized in that: It also includes a dust collector (5), which is connected to the interior of the sealing cover (9) through a pipeline.

8. The graphitizing crucible charging system according to claim 1, characterized in that: It also comprises a servo lifting structure (4), which is connected to the screw feeder and is used to drive the overall lifting of the screw feeder.

9. A graphitizing crucible charging system according to any one of claims 1 to 8, characterized in that: The screw feeding motor (1) and the degassing fan (3) both use frequency conversion controlled motors.

10. A graphitized crucible charging system according to claim 9, characterized in that: It also includes a controller (12) and a touch screen (13); the screw feeding motor (1), the degassing fan (3), the servo lifting structure (4), the dust collector (5), and the back-blowing solenoid valve (6) are electrically connected to the controller (12) respectively; and the touch screen (13) is used to display system operating parameters.

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