Rotary sintering furnace

Abstract

The utility model discloses a rotary sintering furnace which comprises a furnace body assembly, a furnace cover assembly and a furnace cover assembly, the furnace body assembly comprises a converter and a heat preservation shell, the converter is rotatably arranged in the heat preservation shell in a penetrating mode, and the heat preservation shell is provided with a via hole; and the knocking device is arranged outside the heat preservation shell and comprises a knocking piece, and the knocking piece movably penetrates through the via hole and acts on the converter in a knocking mode. According to the rotary sintering furnace, the converter can be knocked at any time before and after sintering or in the sintering process through the knocking piece, materials bonded in the converter can be knocked off in time, the temperature uniformity of the inner wall of the converter is improved, and the possibility that the materials react with furnace wall materials is reduced; the problem that the product carries impurities or overburnt materials exists is solved, the product quality is improved, manual assistance is not needed in the cleaning process, manual cleaning is not needed, and the manual cleaning cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of rotary sintering furnaces, in particular to a rotary sintering furnace. Background Art

[0002] The rotary sintering furnace is a thermal equipment for calcining, roasting or drying granular and powdered materials. It has the advantages of combustion system, strong technical power, precise gas distribution and low burnout rate. It can be used for drying, dehydrating and roasting materials in the chemical industry, for example, it can be used for the production of lithium iron phosphate in the field of new energy. The rotary sintering furnace used for the production of lithium iron phosphate can be an electric heating continuous production device. Before normal operation, the furnace is first dried. When the temperature of the converter rises to the process requirements, the material to be roasted is sent into the converter through the guide pipe of the feed box at the head of the furnace. The material is indirectly heated by the converter to achieve the purpose of roasting. There are spiral blades in the converter, which rotate slowly with the converter. The material is roasted in the converter while moving toward the tail of the furnace through the spiral blades, and finally sent to the next device by the discharge box at the tail of the furnace. When the rotary sintering furnace is used to manufacture lithium iron phosphate, it is found that the positive electrode material of lithium iron phosphate is prone to problems such as bonding skin material and excessive impurity content. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a rotary sintering furnace, which is conducive to reducing the bonding skin material in the discharge and reducing the impurity content in the discharge.

[0004] According to the rotary sintering furnace of the embodiment of the utility model, it includes: a furnace body assembly, the furnace body assembly includes a converter and an insulation shell, the converter is rotatably inserted into the insulation shell, and the insulation shell is provided with a through hole; a knocking device, the knocking device is arranged outside the insulation shell, and the knocking device includes a knocking piece, the knocking piece can be movably passed through the through hole and knock on the converter.

[0005] According to the rotary sintering furnace of the embodiment of the utility model, the knocking piece can knock the converter at any time before, after or during sintering, which is conducive to timely knocking off the material stuck in the converter, improving the temperature uniformity of the inner wall of the converter, reducing the possibility of reaction between the material and the furnace wall material, and improving the problem of carrying impurities or overburned materials in the product, thereby improving product quality. In addition, the cleaning process does not require manual assistance or manual cleaning, thereby reducing the cost of manual cleaning.

[0006] In addition, the rotary sintering furnace according to the above embodiment of the utility model may also have the following additional technical features:

[0007] According to some embodiments of the utility model, the knocking device also includes a bracket and a driving member, the bracket is installed on the insulation shell, the driving member is located outside the insulation shell and installed on the bracket, the knocking member is connected to the driving member, the knocking member is suitable for reciprocating under the drive of the driving member, and passes through the through hole to knock on the converter; or, the knocking member is suitable for reciprocating under the action of gravity and the driving member, and passes through the through hole to knock on the converter.

[0008] According to some embodiments of the utility model, the bracket is provided with a guide wheel, the driving member is connected to the knocking member via a pull rope, the pull rope is wound around the guide wheel, the part of the pull rope located between the guide wheel and the knocking member extends in a vertical direction, the part of the pull rope located between the guide wheel and the driving member extends along the driving direction of the driving member, and the driving direction of the driving member is inconsistent with the movement direction of the knocking member.

[0009] According to some embodiments of the utility model, there are at least two guide wheels, namely a first guide wheel and a second guide wheel, the first guide wheel and the second guide wheel are arranged apart from each other, the position of the second guide wheel along the axial direction of the converter is adjustable, one end of the pull rope is connected to the driving member, the other end of the pull rope is connected to the knocking member, and the pull rope is sequentially wound around the first guide wheel and the second guide wheel and then connected to the knocking member.

[0010] According to some embodiments of the utility model, the bracket is provided with a plurality of guide holes opposite to the through hole, the plurality of guide holes are arranged spaced apart along the axial direction of the converter, and the knocking member is selectively penetrated into the guide hole.

[0011] According to some embodiments of the utility model, the bracket is provided with a plurality of mounting positions, the plurality of mounting positions are spaced apart along the axial direction of the converter and correspond to the positions of the plurality of guide holes, and the second guide wheel is selectively installed at the mounting position.

[0012] According to some embodiments of the present invention, the bracket is provided with a guide hole opposite to the through hole, and the knocking member is movably inserted into the guide hole.

[0013] According to some embodiments of the utility model, the bracket includes a top frame, a vertical frame and a bottom frame, the top frame and the bottom frame are connected through the vertical frame, and the bracket is installed on the top of the insulation shell through the bottom frame; the guide wheel is arranged on the top frame, the bottom frame is provided with a guide cylinder, the guide cylinder defines the guide hole, and the driving member is installed on the vertical frame.

[0014] According to some embodiments of the present invention, the length of the knocking member is greater than the distance between the axial outer end of the through hole and the outer peripheral surface of the converter.

[0015] According to some embodiments of the utility model, the knocking member includes a knocking segment and a plurality of connecting segments connected in sequence along the movement direction, the end of the knocking segment knocks on the converter, and the connecting segment is connected to the driving member; the cross-sectional area of ​​the knocking segment perpendicular to the movement direction is larger than the cross-sectional area of ​​the connecting segment perpendicular to the movement direction, and the cross-sectional area of ​​the knocking segment perpendicular to the movement direction is smaller than the cross-sectional area of ​​the guide hole perpendicular to the penetration direction, and the cross-sectional area of ​​the knocking segment perpendicular to the movement direction is smaller than the cross-sectional area of ​​the through hole perpendicular to the penetration direction.

[0016] According to some embodiments of the present invention, the striking member is provided with a weight.

[0017] According to some embodiments of the utility model, the weighted weight is installed on the striking piece and is located on the side of the guide hole facing away from the through hole; and the distance between the bottom of the weighted weight and the end of the striking section is L1, and the distance between the axial outer end of the guide hole and the outer peripheral surface of the converter is L2, and L1≥L2.

[0018] According to some embodiments of the present invention, the bracket includes a guide cylinder, and the guide cylinder defines the guide hole.

[0019] According to some embodiments of the utility model, the driving member has a driving end connected to the pull rope, the driving end is movable, there is one guide wheel, the part of the pull rope located between the guide wheel and the driving end extends parallel to the moving direction of the driving end, and the part of the pull rope located between the guide wheel and the knocking member extends parallel to the penetration direction of the through hole.

[0020] According to some embodiments of the utility model, a gasket is provided on the outer circumferential surface of the converter, and the gasket includes a plurality of gasket blocks arranged at preset intervals along the circumference of the converter, and the knocking piece acts on the converter by knocking the gasket blocks.

[0021] According to some embodiments of the present invention, the cushion block is made of the same material as that of the converter.

[0022] According to some embodiments of the present invention, there are multiple knocking devices, and the multiple knocking devices are installed on the insulation shell at intervals along the axial direction of the converter.

[0023] According to some embodiments of the present invention, the polishing degree Ra of the furnace cavity wall of the converter is less than or equal to 3 μm; and / or the material of the converter is stainless steel or alloy.

[0024] According to some embodiments of the utility model, the rotary sintering furnace is used in the preparation of new energy materials to dynamically sinter raw materials. The new energy materials include lithium-ion battery positive electrode materials. The lithium-ion battery positive electrode materials include lithium iron phosphate, lithium cobalt oxide or lithium nickel cobalt manganese oxide.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 It is a front view of a rotary sintering furnace according to an embodiment of the utility model;

[0028] Figure 2 is a top view of a rotary sintering furnace according to an embodiment of the utility model;

[0029] Figure 3 is a schematic structural diagram of a bracket according to a first embodiment of the utility model;

[0030] Figure 4 is a schematic structural diagram of a striking device according to a first embodiment of the utility model;

[0031] Figure 5 is a partial structural schematic diagram of a striking device according to a first embodiment of the utility model;

[0032] Figure 6 is a partial enlarged view of a rotary sintering furnace according to a second embodiment of the utility model;

[0033] Figure 7 It is a partial structural schematic diagram of a rotary sintering furnace according to the second embodiment of the utility model.

[0034] Reference numerals:

[0035] Rotary sintering furnace 1000;

[0036] Furnace body assembly 100; heating section 101; heat preservation section 102; cooling section 103;

[0037] Converter 1; furnace head 11; insulation shell 5;

[0038] A striking device 200;

[0039] Driving member 6; driving end 61;

[0040] Striking member 7; striking section 71; connecting section 72; weighting weight 73;

[0041] Guide wheel 81; Pull rope 82;

[0042] Bracket 9; vertical frame 91; top frame 92; bottom frame 93; guide cylinder 94; guide hole 95;

[0043] Pneumatic percussion hammer 400. DETAILED DESCRIPTION

[0044] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0045] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them, the first feature "above", "above" and "above" the second feature may include the first feature being directly above and diagonally above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0047] The rotary sintering furnace is a thermal equipment for calcining, roasting or drying granular and powdered materials. It has the advantages of combustion system, strong technical power, precise gas distribution, and low burn-out rate. However, when the rotary sintering furnace is used to manufacture lithium iron phosphate, it is found that the lithium iron phosphate positive electrode material has a bonding skin material, too high impurity content, and poor quality. After research, the present application creatively discovered that during the sintering process of lithium iron phosphate materials in the rotary sintering furnace, due to the characteristics of the lithium iron phosphate material itself, the material is easy to adhere to the inner wall of the converter or the spiral blades in the converter, affecting the temperature uniformity of the inner wall of the converter, causing the local temperature to be too high, that is, due to the bonding material, the local sintering temperature of the converter is too high, making the material easy to react with the furnace wall material of the converter, thereby causing impurities to be carried in the product or the presence of overburned materials, affecting the product quality. Moreover, when the material bonded to the inner wall is sintered at high temperature for a long time, it is easy to form an over-sintered skin, that is, after the material is bonded to the inner wall of the converter, the flaky solid formed by sintering or over-sintering is larger than the required particle size of the material, which affects the electrical properties of the product such as charge and discharge cycles, and cannot be used normally after recycling, resulting in waste and increasing production costs. At present, the inner wall of the converter is usually cleaned manually, but it is inconvenient for operators to enter the inside of the converter for cleaning, and the cleaning is too troublesome and dangerous. In addition, the cleaning needs to be done after sintering. At this time, the bonded materials are more and thicker, which makes cleaning more difficult and the cleaning effect is not good.

[0048] To this end, the utility model provides a rotary sintering furnace 1000. When the rotary sintering furnace 1000 of the embodiment of the present application is used to manufacture lithium iron phosphate, the bonding skin material in the lithium iron phosphate positive electrode material can be reduced, the impurity content can be reduced, and the product quality can be improved.

[0049] The rotary sintering furnace 1000 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0050] Reference Figure 1-Figure 7 As shown, the rotary sintering furnace 1000 according to the embodiment of the present invention may include: a furnace body assembly 100 and a knocking device 200 .

[0051] Specifically, the furnace assembly 100 includes a converter 1 and an insulation shell 5, wherein the converter 1 is rotatably inserted into the insulation shell 5, and the insulation shell 5 is provided with a through hole. The knocking device 200 is provided outside the insulation shell 5, and the knocking device 200 includes a knocking member 7, which is movably inserted into the through hole and knocks on the converter 1.

[0052] The converter 1 is used to calcine, roast or dry the internal materials. For example, in some embodiments, Figure 1-Figure 2As shown, the converter 1 is an integral cylindrical structure (but it is not required to be a whole cylinder, for example, it can be composed of multiple sections of cylinders rigidly connected), the two ends of the converter 1 are respectively connected to the feed box and the discharge box, and the converter 1 has spiral blades. The furnace body assembly 100 also includes a heating device and a driving device, the heating device is used to heat the converter 1, and the driving device is used to drive the converter 1 to rotate. The material enters the converter 1 from the feed box, the heating device heats the converter 1 to heat the material in the converter 1, the driving device drives the converter 1 to rotate, and the spiral blades rotate synchronously with the converter 1, so that when the converter 1 rotates, the rotation of the spiral blades pushes the material in the converter 1 to move in the discharge direction, and finally discharges the material into the discharge box, so as to achieve calcination, roasting or drying of the material inside the converter 1.

[0053] The insulation shell 5 is used to insulate the internal converter 1, reduce heat loss, and help ensure the high heat environment of the converter 1 and improve the sintering efficiency. For example, in some embodiments, the furnace body assembly 100 also includes a plurality of heating devices, and the heating device includes a plurality of electric heaters arranged side by side along the axial direction. The electric heater is arranged between the insulation shell 5 and the converter 1 to heat the converter 1. The insulation shell 5 can effectively reduce heat loss, so that the heat can be fully used to heat the converter 1, improve heat utilization, and reduce sintering costs. It is worth noting that the composition of the insulation shell 5 is not limited. For example, the insulation shell 5 may include a metal shell and an insulation layer arranged on the inner wall of the metal shell, such as insulation bricks, insulation cotton, etc., so as to more effectively lock the heat in the insulation shell 5 and reduce heat waste.

[0054] The insulation shell 5 is provided with a through hole, so that the knocking piece 7 can pass through the through hole to contact and knock the converter 1, so as to knock off the material adhered to the inner wall of the converter 1. In some embodiments, grease or insulation cotton is provided at the through hole to perform dynamic sealing with the knocking piece 7, which can reduce heat loss and improve the insulation performance of the insulation shell 5. The knocking piece 7 can be in the shape of a hammer, a column, etc.

[0055] The knocking device 200 is arranged outside the heat preservation shell 5, and the heat preservation shell 5 is arranged outside the converter 1, so that the knocking member 7 is arranged outside the converter 1, so that the knocking member 7 will not directly contact the material in the converter 1 during the knocking process, so as to avoid the interference of the knocking device 200 on the material transportation and heating, so that the sintering work of the material in the converter 1 can proceed smoothly. In addition, the temperature in the converter 1 will not affect the work of the knocking device 200, which can improve the working stability of the knocking device 200. In addition, the heat preservation shell 5 and the converter 1 are independent of each other, so that the installation of the knocking device 200 is convenient, and the knocking device 200 can be disassembled or replaced at any time according to actual conditions.

[0056] After sintering, the materials adhered to the inner wall of the converter 1 are more and thicker, and the cleaning process of the knocking piece 7 knocking the converter 1 can be carried out simultaneously with the sintering process instead of having to be carried out after sintering, which is conducive to timely cleaning before the materials adhered to the inner wall of the converter 1 are more and thicker, reducing the cleaning difficulty and improving the cleaning effect. In other words, the materials adhered to the inner wall of the converter 1 during the sintering process are less than those after sintering, and are easier to knock off, making cleaning less difficult and having a higher cleaning effect.

[0057] In addition, the cleaning process does not require manual assistance, which helps reduce the cost of manual cleaning and simplifies the difficulty of cleaning the materials adhered to the inner wall of the converter 1.

[0058] It is worth noting that the bonded materials will be mixed with the materials in the converter 1 after being knocked off, and will be screened synchronously after being discharged, and those meeting the particle size requirements will be used normally as products. By knocking off the bonded materials in time during the sintering process by the knocking member 7, the sintered skin can be reduced, thereby reducing waste, reducing production costs, and improving product quality.

[0059] According to the rotary sintering furnace 1000 of the embodiment of the utility model, the knocking piece 7 can knock the converter 1 at any time before, after or during sintering, so as to knock off the materials stuck in the converter 1 in time, improve the temperature uniformity of the inner wall of the converter 1, reduce the possibility of reaction between the materials and the furnace wall materials, improve the problem of carrying impurities or overburned materials in the product, improve the product quality, and the cleaning process does not require manual assistance or manual cleaning, thereby reducing the cost of manual cleaning.

[0060] In some embodiments of the utility model, the rotary sintering furnace 1000 is used in the preparation of new energy materials to dynamically sinter the raw materials. The new energy materials include lithium-ion battery positive electrode materials, and the lithium-ion battery positive electrode materials include lithium iron phosphate, lithium cobalt oxide or lithium nickel cobalt manganese oxide. Among them, the lithium-ion battery positive electrode material includes one of lithium iron phosphate, lithium cobalt oxide and lithium nickel cobalt manganese oxide. New energy materials such as lithium-ion battery positive electrode materials are prone to adhesion or even over-sintering during the sintering process. The use of the rotary sintering furnace 1000 of the utility model to sinter the lithium-ion battery positive electrode material can knock off the bonded materials in time, reduce the bonding rate of the lithium-ion battery positive electrode material during the sintering process and the possibility of over-sintering, which is conducive to fully sintering the raw materials, reducing the waste of raw materials and improving product quality.

[0061] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the knocking device 200 further includes a driving member 6 , and a knocking member 7 is connected to the driving member 6 . The knocking member 7 can reciprocate under the drive of the driving member 6 and pass through the through hole to knock on the converter 1 .

[0062] The driving member 6 can be installed on the heat preservation shell 5, or on other components, so that the driving member 6 can drive the knocking member 7 to move. For example, the knocking device 200 further includes a bracket 9, which is installed on the heat preservation shell 5, and the driving member 6 is located outside the heat preservation shell 5 and installed on the bracket 9.

[0063] The knocking member 7 is driven to reciprocate by the driving member 6, so that the knocking member 7 can pass through the through hole to knock on the converter 1, so as to knock off the materials adhered to the inner wall of the converter 1. The knocking member 7 can be arranged horizontally, that is, the knocking member 7 is located at the central horizontal plane of the converter 1 (that is, the horizontal plane where the rotation axis of the converter 1 is located), and the knocking member 7 can be driven by the driving member 6 to move near the converter 1 in the horizontal direction to knock the converter 1, and the knocking member 7 can also be driven by the driving member 6 to move away from the converter 1 in the horizontal direction to realize the reciprocating motion of the knocking member 7, so that the knocking member 7 can knock the converter 1 multiple times, thereby improving the cleaning efficiency.

[0064] In some embodiments, Figure 1-Figure 4 As shown, the knocking member 7 can move back and forth under the action of gravity and the driving member 6 and pass through the through hole to knock on the converter 1, so as to knock off the materials adhered to the inner wall of the converter 1. Gravity refers to the gravity of the knocking member 7 itself. The knocking member 7 can be set vertically or tilted, that is, the knocking member 7 can be located on the central vertical plane of the converter 1 (that is, the horizontal plane where the rotation axis of the converter 1 is located), and the knocking member 7 can also be located on one side of the central vertical plane of the converter 1 or on one side of the central horizontal plane of the converter 1. For example, the knocking member 7 is located directly above, directly below, obliquely above, obliquely below, etc. of the converter 1, which is conducive to flexibly setting the relative position of the knocking member 7 and the converter 1.

[0065] For example, in some embodiments, Figure 1 As shown, the knocking member 7 is arranged right above the converter 1, so that the knocking member 7 can fall naturally under the action of gravity, that is, the knocking member 7 can move downward to approach and knock the converter 1, and can more effectively knock off the materials adhered to the inner wall of the converter 1. The knocking member 7 can overcome gravity and move upward to move away from the converter 1 under the driving action of the driving member 6, and the knocking member 7 can move downward to knock the converter 1 by gravity, so that the knocking member 7 can reciprocate to achieve multiple knocks on the converter 1.

[0066] For example, in some embodiments, the knocking piece 7 is arranged directly below the converter 1, so that the knocking piece 7 can fall naturally under the action of gravity, that is, the knocking piece 7 can move downward to move away from the converter 1, and the driving piece 6 can drive the knocking piece 7 to overcome gravity and move upward to approach and knock the converter 1, thereby realizing the reciprocating movement of the knocking piece 7 to achieve multiple knocks on the converter 1.

[0067] For example, in some embodiments, the knocking piece 7 is arranged at an oblique upper portion of the converter 1, so that the knocking piece 7 can move obliquely downward toward the converter 1 under the action of gravity and the driving piece 6 to knock the converter 1, so as to knock off the material adhered to the inner wall of the converter 1, and the knocking piece 7 can overcome gravity and move obliquely upward away from the converter 1 under the driving action of the driving piece 6, thereby realizing the reciprocating movement of the knocking piece 7 to achieve multiple knocks on the converter 1.

[0068] The utility model is explained by taking the example that the knocking member 7 is arranged just above the converter 1. The rotary sintering furnace 1000 of the utility model embodiment is provided with a through hole in the insulation shell 5, and a knocking device 200 is provided outside the insulation shell 5, and the driving member 6 is used to drive the knocking member 7 to overcome gravity to do work, and then the gravity of the knocking member 7 can be used to pass through the through hole to knock the converter 1 located in the insulation shell 5, which can overcome the influence of the high temperature environment in the insulation shell 5 on the knocking device 200, so that various positions of the converter 1 where material adhesion may occur can be knocked, so as to avoid excessive sintering caused by material adhesion in the converter 1.

[0069] The use of gravity to realize the knocking of the knocking piece 7 on the converter 1 is easy to realize, and can reduce the number of other parts used to drive the knocking piece 7 to move toward the converter 1, which is conducive to simplifying the structure, and only the knocking piece 7 enters the interior of the insulation shell 5 to knock the converter 1, which is conducive to reducing the through-hole area, thereby reducing the heat loss inside the insulation shell 5. Compared with the mechanical structure that purely relies on gravity to achieve physical knocking, the rotary sintering furnace 1000 of the embodiment of the utility model can control the time, frequency and force of knocking on the converter 1 by controlling the working time and working frequency of the driving piece 6 and the distance of driving the knocking piece 7 to move, which is conducive to improving the controllability of the equipment, and then can adjust the knocking of the knocking piece 7 according to the actual sintering process, the bonding condition of the internal materials and the material of the converter 1, while ensuring the knocking cleaning effect, avoiding local deformation or even damage of the converter 1 due to excessive knocking force, high knocking frequency and long-term fixed knocking position.

[0070] The driving member 6 can drive the knocking member 7 to overcome the effect of gravity and move away from the converter 1, so that the knocking member 7 is separated from the converter 1. After the driving member 6 stops working, the knocking member 7 is affected by gravity and moves toward the converter 1. The knocking member 7 knocks on the converter 1 to achieve the reciprocating motion of the knocking member 7 to repeatedly knock, and can avoid the knocking member 7 from contacting the converter 1 for too long and affecting the rotation of the converter 1, as well as causing scratches, crushing or even deformation to the converter 1. It is beneficial to knock and clean the materials stuck to the inner wall of the converter 1 while protecting the converter 1.

[0071] In addition, the distance between the knocking member 7 and the converter 1 can be increased by the driving member 6, and the moving range between the knocking member 7 and the converter 1 is ensured, so that the subsequent knocking member 7 can move toward the converter 1 to knock the converter 1. Moreover, the distance between the knocking member 7 and the converter 1 can be adjusted by the driving member 6, that is, the moving range of the knocking member 7 moving toward the converter 1 is adjusted, which is conducive to controlling the knocking force of the knocking member 7 on the converter 1, so that the knocking force is not too large to reduce damage to the converter 1, which is conducive to protecting the converter 1, and the knocking force is not too small to increase the possibility of the bonding material falling off, which is conducive to improving the cleaning effect.

[0072] For example, in some embodiments, Figure 1 and Figure 3-Figure 4 As shown, the knocking member 7 is arranged right above the converter 1, and the knocking member 7 will naturally fall down under the action of gravity, and the driving member 6 can make the knocking member 7 overcome the action of gravity and move upward to be away from the converter 1, so that the knocking member 7 can move upward in the vertical direction to be away from the converter 1. The driving member 6 drives the knocking member 7 to move upward to a height of 500-600 mm, for example, a height of 500 mm, 550 mm, 600 mm, etc.

[0073] The driving member 6 can also control the frequency of the knocking of the knocking member 7 on the converter 1. For example, the knocking member 7 can knock on the converter 1 at regular intervals or irregularly during the rotation of the converter 1. This is beneficial for the knocking member 7 to knock on more areas of the converter 1 along the circumferential direction, thereby increasing the knocking range and improving the cleaning efficiency.

[0074] For example, in some embodiments, the knocking frequency of the knocking member 7 is controlled by the driving member 6 to be 1 time / 4s to 4min, which is conducive to timely knocking off the bonding materials in the converter 1 and is not easy to damage the converter 1 due to too high a frequency. For example, knock once every 4s, or knock once every 2min, or knock once every 4min, etc.

[0075] Therefore, the knocking piece 7 can move toward the converter 1, and the knocking piece 7 can also move away from the converter 1, which is conducive to the repeated knocking of the knocking piece 7 on the converter 1, and the frequency and knocking strength of the repeated knocking of the knocking piece 7 can be controlled by the driving piece 6, which is conducive to cleaning as much sticky material as possible while protecting the converter 1, thereby improving the cleaning efficiency.

[0076] In the knocking device 200, the knocking member 7 passes through the through hole of the insulation shell 5 to knock the converter 1, so the driving member 6 can be arranged outside the insulation shell 5, so that the driving member 6 can drive the knocking member 7 to move away from the converter 1, thereby reducing the damage to the driving member 6 caused by the high temperature environment between the insulation shell 5 and the converter 1, which is beneficial to protecting the driving member 6.

[0077] The driving member 6 can be installed just above the striking member 7 to drive the striking member 7 to overcome gravity and move upward away from the converter 1. The driving member 6 can also drive the striking member 7 to move with the help of other components so that the relative positions of the driving member 6 and the striking member 7 can be flexibly set. For example, in some embodiments of the present invention, Figure 4-Figure 6 As shown, the bracket 9 is provided with a guide wheel 81, the driving member 6 is connected to the knocking member 7 through a pull rope 82, the pull rope 82 is wound around the guide wheel 81, the part of the pull rope 82 between the guide wheel 81 and the knocking member 7 extends in the vertical direction, and the part of the pull rope 82 between the guide wheel 81 and the driving member 6 extends along the driving direction of the driving member 6, and the driving direction of the driving member 6 is inconsistent with the movement direction of the knocking member 7. Here, the driving direction of the driving member 6 and the movement direction of the knocking member 7 are both directional, for example, in some embodiments, such as Figure 4 As shown, when the driving member 6 drives the striking member 7 to move upward, the driving direction is vertically downward, and the moving direction is vertically upward.

[0078] Through the cooperation of the pull rope 82 and the guide wheel 81, the driving direction of the driving member 6 can be reversed, so that the relative position of the driving member 6 and the striking member 7 is more flexible, and the driving member 6 and the striking member 7 can be installed in different installation spaces, which is beneficial to improve the practicality and space compactness while ensuring that the driving member 6 drives the striking member 7 to overcome the gravity and move. For example, in some embodiments, the driving member 6 is installed on the right side, the upper right side, etc. of the gravity hammer 7.

[0079] Specifically, through the pull rope 82 and the guide wheel 81, the driving member 6 can drive the knocking member 7 to move in the vertical direction, and the driving direction of the driving member 6 is inconsistent with the movement direction of the knocking member 7, which is conducive to the reversal of the driving direction, making the relative position of the driving member 6 and the knocking member 7 more flexible, which is conducive to reducing the installation height of the driving member 6, reducing the size of the bracket 9, and improving the installation stability of the driving member 6. It is also conducive to reducing the installation space of the knocking device 200 and improving the compactness of the installation space.

[0080] For example, in some embodiments, the driving direction of the driving member 6 extends obliquely upward from the guide wheel 81 to the driving member 6, so as to drive in an obliquely upward direction and pull the striking member 7 upward through the guide wheel 81 and the pull rope 82, which is conducive to reducing the installation height of the driving member 6 and reducing the occupied space of the striking device 200. Alternatively, the driving direction of the driving member 6 extends in a horizontal direction from the guide wheel 81 to the driving member 6, so as to drive in a horizontal direction and pull the striking member 7 upward through the guide wheel 81 and the pull rope 82, so that the installation height of the driving member 6 is lower and the space occupied by the striking device 200 is smaller.

[0081] Alternatively, the driving direction of the driving member 6 extends obliquely downward from the guide wheel 81 to the driving member 6, so as to drive along the oblique downward direction and pull the knocking member 7 upward through the guide wheel 81 and the pull rope 82, so that the installation height of the driving member 6 is lower and the space occupied by the knocking device 200 is smaller. Alternatively, the driving direction of the driving member 6 extends vertically downward from the guide wheel 81 to the driving member 6, so as to drive downward and pull the knocking member 7 upward through the guide wheel 81 and the pull rope 82, so that the installation height of the driving member 6 is lower and the space occupied by the knocking device 200 is smaller, etc.

[0082] In some embodiments, there are at least two guide wheels 81, which are respectively the first guide wheel and the second guide wheel. The first guide wheel and the second guide wheel are arranged separately, and the position of the second guide wheel along the axial direction of the converter 1 is adjustable. One end of the pull rope 82 is connected to the driving member 6, and the other end of the pull rope 82 is connected to the knocking member 7. The pull rope 82 is sequentially wound around the first guide wheel and the second guide wheel and then connected to the knocking member 7.

[0083] The first guide wheel and the second guide wheel can both realize the reversal of the driving direction, and the reversal is more flexible. For example, in some embodiments, the first guide wheel changes the driving direction from the vertical direction between the first guide wheel and the driving member 6 to the horizontal direction between the second guide wheel and the first guide wheel, and the second guide wheel changes the driving direction from the horizontal direction between the first guide wheel and the second guide wheel to the vertical direction between the second guide wheel and the knocking member 7.

[0084] Furthermore, the position of the second guide wheel along the axial direction of the converter 1 is adjustable, and the position of the knocking member 7 along the axial direction of the converter 1 can be adjusted, so as to knock on different axial positions of the converter 1, and the knocking range is wider. Specifically, the position of the second guide wheel along the axial direction of the converter 1 is adjustable, and the position of the end of the pull rope 82 close to the knocking member 7 along the axial direction of the converter 1 can be adjusted by adjusting the position of the second guide wheel, and then the position of the knocking member 7 along the axial direction of the converter 1 can be adjusted to adjust the knocking range of the knocking member 7 on the converter 1 along the axial direction, which is conducive to knocking on more areas of the converter 1 along the axial direction, so as to have a wider cleaning range and higher cleaning efficiency, and at the same time, it can also prevent the knocking member 7 from knocking on the fixed position of the converter 1 for a long time, causing local deformation or even damage thereof.

[0085] Furthermore, through the cooperation of the first guide wheel and the second guide wheel, the pull rope 82 can be limited, the deviation of the pull rope 82 during the movement process can be reduced, and the stability of the driving member 6 driving the knocking member 7 to move through the pull rope 82 can be improved. For example, in some embodiments, the first guide wheel and the second guide wheel are arranged in a spaced relationship along the axial direction of the converter 1, so that the portion of the pull rope 82 located between the first guide wheel and the driving member 6 and the portion of the pull rope 82 located between the second guide wheel and the knocking member 7 are not easily deviated in the horizontal direction or even interfere with each other.

[0086] Of course, the number of guide wheels 81 may also be three, four or more, which makes the reversal of the driving direction more flexible and provides a better limiting effect on the pull rope 82 .

[0087] In some embodiments, the bracket 9 is provided with a guide hole 95 opposite to the through hole, and the knocking member 7 is movably inserted into the guide hole 95. The guide hole 95 can guide and limit the movement of the knocking member 7, reduce the deviation and shaking of the knocking member 7 during the knocking process, improve the reliability of the knocking work, and further improve the cleaning stability of the converter 1.

[0088] In some embodiments, the bracket 9 is provided with a plurality of guide holes 95 opposite to the through holes, and the plurality of guide holes 95 are arranged at intervals along the axial direction of the converter 1, and the knocking piece 7 is selectively inserted into the guide hole 95. Specifically, one through hole may correspond to a plurality of guide holes 95, so that the knocking piece 7 can be more conveniently adjusted to be inserted into any one of the plurality of guide holes 95 and pass through the through hole to knock the converter 1. Alternatively, a plurality of through holes may correspond to a plurality of guide holes 95, respectively, which is beneficial to reducing the opening area of ​​the through holes and reducing heat loss in the insulation shell 5. The knocking position of the knocking piece 7 can be adjusted by adjusting the position of the second guide wheel. Combined with the plurality of guide holes 95, the plurality of guide holes 95 can respectively adapt to different positions of the knocking piece 7, which is beneficial to guiding and limiting the movement of the knocking piece 7 while increasing the knocking range, thereby improving the working stability of the knocking piece 7.

[0089] In some embodiments of the present invention, Figure 4 As shown, the length of the knocking piece 7 is greater than the distance between the axial outer end of the through hole and the outer peripheral surface of the converter 1, so that the knocking piece 7 will not be completely between the insulation shell 5 and the converter 1, preventing the knocking piece 7 from tilting between the insulation shell 5 and the converter 1 or even getting stuck between the insulation shell 5 and the converter 1 and unable to leave the space between the converter 1 and the insulation shell 5 through the through hole, making it easy for the knocking piece 7 to move from the through hole in a direction away from the converter 1, thereby facilitating repeated knocking of the knocking piece 7 and improving the reliability of the knocking piece 7 knocking on the converter 1.

[0090] In some embodiments of the present invention, Figure 4 As shown, the knocking member 7 includes a knocking segment 71 and a plurality of connecting segments 72 which are sequentially connected along the moving direction, the end of the knocking segment 71 knocks on the converter 1, and the connecting segment 72 is connected to the driving member 6. The cross-sectional area of ​​the knocking segment 71 perpendicular to the moving direction is larger than the cross-sectional area of ​​the connecting segment 72 perpendicular to the moving direction, and the cross-sectional area of ​​the knocking segment 71 perpendicular to the moving direction is smaller than the cross-sectional area of ​​the guide hole 95 perpendicular to the penetration direction, and the cross-sectional area of ​​the knocking segment 71 perpendicular to the moving direction is smaller than the cross-sectional area of ​​the through hole perpendicular to the penetration direction.

[0091] The movement direction of the knocking member 7 may refer to the length direction of the knocking member 7. The plurality of connecting segments 72 may refer to one, two or more connecting segments 72, and the connecting segment 72 connected to the driving member 6 may be any one of the plurality of connecting segments 72. Figure 4 As shown, the striking member 7 includes a striking section 71 and a connecting section 72 . The striking section 71 is located at the lower side of the connecting section 72 and close to the converter 1 . The connecting section 72 is connected to the driving member 6 via a pull rope 82 .

[0092] Both the knocking section 71 and the connecting section 72 can pass through the guide hole 96 and the through hole, and the knocking section 71 can knock the converter 1, which is beneficial to improving the reliability of the knocking member 7 knocking the converter 1. And under the premise of ensuring that the knocking force of the knocking member 7 meets the requirements, the cross-sectional area of ​​the knocking section 71 perpendicular to the movement direction can be increased to increase the knocking range of the knocking section 71 on the converter 1, which is beneficial to realize the cleaning of a larger range of the converter 1, and by increasing the knocking range, stress concentration can be reduced, thereby reducing damage to the converter 1, which is beneficial to protecting the converter 1.

[0093] In some embodiments, Figure 4 As shown, the cross-sectional area of ​​the multi-section connecting section 72 perpendicular to the direction of movement decreases in the direction away from the striking section 71, which is beneficial to reducing the basic weight of the striking member 7, distributing more gravity of the striking member 7 to the striking section 71, and increasing the striking force and striking range of the striking section 71.

[0094] In some embodiments of the present invention, Figure 4 As shown, the knocking piece 7 is provided with a weighted weight 73. The weighted weight 73 can increase the weight of the knocking piece 7, thereby increasing the knocking force of the knocking piece 7, without increasing the knocking force by increasing the volume of the knocking piece 7, which is conducive to improving the utilization rate of the installation space. Moreover, the number of weighted weights 73 can be increased or decreased at any time according to demand, or weighted weights 73 of different weights can be replaced to adjust the knocking force of the knocking piece 7, without having to replace the knocking piece 7 of different weights, which is convenient to use.

[0095] The weighted weight 73 can be connected to the striking member 7 by bolt connection, riveting, welding, etc. For example, in some embodiments, the weighted weight 73 is sleeved on the striking member 7 and fixedly connected to the striking member 7 by bolts.

[0096] In some embodiments, the cross-sectional area of ​​the striking segment 71 and the plurality of connecting segments 72 perpendicular to the direction of movement decreases in the direction away from the converter 1, which is beneficial to reducing the basic weight of the striking member 7, and the striking member 7 is provided with a weighted weight 73 on the side of the guide hole 95 facing away from the through hole. When it is necessary to increase the striking force, the number of weighted weights 73 can be increased to meet different striking force requirements, which is beneficial to increasing the adjustment range of the striking force.

[0097] In some embodiments, Figure 4 As shown, the cross-sectional area of ​​the weighted weight 73 perpendicular to the penetrating direction of the guide hole 95 is larger than the cross-sectional area of ​​the guide hole 95 perpendicular to the penetrating direction. This prevents the knocking member 7 from passing through the guide hole 95 downward, and can limit the movement of the knocking member 7, thereby preventing the knocking member 7 from moving downward and passing through the guide hole 95 as a whole and being separated from the bracket 9, thereby improving the working reliability of the knocking device 200.

[0098] In some embodiments, the weighted weight 73 is installed and sleeved on the striking member 7 and is located on the side of the guide hole 95 facing away from the through hole. The distance between the bottom of the weighted weight 73 (i.e., the end of the weighted weight 73 close to the converter 1) and the end of the striking section 71 (i.e., the striking end of the striking section 71 striking the converter 1) is L1, and the distance between the axial outer end of the guide hole 95 and the outer peripheral surface of the converter 1 is L2, L1≥L2, so as to ensure that the weighted weight 73 will not affect the striking member 7 passing through the through hole after installation, and is conducive to guiding the striking member 7 while ensuring that the end of the striking section 71 can strike the converter 1.

[0099] In some embodiments of the present invention, Figure 3-Figure 4 As shown, the bracket 9 includes a guide cylinder 94, and the guide cylinder 94 defines a guide hole 95. The guide cylinder 94 can guide and limit the movement of the knocking member 7 with good effect. The guide cylinder 94 and the guide hole 95 can guide and limit the knocking member 7 together, which is conducive to improving the guiding and limiting effect of the knocking member 7 and avoiding the knocking member 7 from deviating in the vertical direction.

[0100] For example, in some embodiments, Figure 3-Figure 4 As shown, the guide tube 94 is arranged along the length direction (i.e. Figure 3-Figure 4 The knocking piece 7 extends in the up-down direction (as shown in the figure), and the knocking piece 7 is inserted into the guide tube 94. The guide tube 94 can guide and limit the movement of the knocking piece 7 in the up-down direction, so that the knocking piece 7 moves more in the up-down direction, reducing the displacement of the knocking piece 7 relative to the up-down direction, and the guiding and limiting effects are better.

[0101] The number of guide cylinders 94 may be one or more, and correspondingly, the number of guide holes 95 may be one or more. Figure 3-Figure 4 As shown, there are three guide cylinders 94 and three guide holes 95, and the three guide cylinders 94 are arranged one by one with the three guide holes 95. The three guide cylinders 94 are spaced apart or arranged in contact along the axial direction, and the knocking member 7 is selectively inserted into the guide cylinder 94 and the corresponding guide hole 95, so that the action position of the knocking member 7 to knock the converter 1 can be changed and the knocking member 7 can be guided and limited, so that the knocking position of the knocking member 7 on the converter 1 can be prevented from being fixed for a long time, causing local deformation or even damage to the converter 1.

[0102] In some embodiments of the present invention, Figure 1-Figure 7 As shown, the driving member 6 has a driving end 61 connected to a pull rope 82, the driving end 61 is movable, there is one guide wheel 81, the portion of the pull rope 82 between the guide wheel 81 and the driving end 61 extends parallel to the moving direction of the driving end 61, and the portion of the pull rope 82 between the guide wheel 81 and the knocking member 7 extends parallel to the penetration direction of the through hole.

[0103] The driving direction of the driving end 61 can be reversed by a guide wheel 81, so that the relative position of the driving member 6 and the striking member 7 is more flexible, which is conducive to reducing the installation height of the driving member 6 and saving the space occupied by the striking device 200. In addition, the pull rope 82 is divided into the above-mentioned two extending parts by a guide wheel 81, which can reduce the number of reversals of the pull rope 82, which is conducive to shortening the movement time of the pull rope 82, thereby improving the striking efficiency of the striking member 7.

[0104] The driving end 61 can move horizontally, vertically, or in other directions. Figure 4 As shown, the driving end 61 is movable in the vertical direction, so that the relative position of the driving member 6 and the striking member 7 can be more flexible. Figure 6 As shown, the driving end 61 is movable in the horizontal direction, which is beneficial to improving the installation stability of the driving member 6.

[0105] In some embodiments of the present invention, Figure 4 As shown, the driving member 6 is a cylinder, and the cylinder has a piston rod connected to the pull rope 82. By adjusting the air intake, air output and other values ​​of the cylinder, the driving force and driving speed of the piston rod on the pull rope 82 can be adjusted, and then the knocking force and knocking frequency of the knocking member 7 can be adjusted to facilitate operation. The cylinder is easily damaged by high temperature, but the present application can set the driving member 6 outside the insulation shell 5, that is, the cylinder is set outside the high temperature environment between the insulation shell 5 and the converter 1, which can reduce the high temperature damage to the cylinder and is beneficial to protecting the cylinder. In some embodiments, the piston rod is the driving end 61 of the driving member 6.

[0106] In some embodiments of the utility model, a gasket is provided on the outer circumference of the converter 1, and the gasket includes a plurality of gaskets arranged at preset intervals along the circumference of the converter 1, and the knocking piece 7 acts on the converter 1 by knocking the gasket. The gasket between the knocking piece 7 and the converter 1 can provide a buffer for the knocking force of the knocking piece 7 knocking the converter 1, so that the knocking piece 7 knocks the gasket and transmits the knocking force to the converter 1 through the gasket, thereby reducing the direct impact force on the outer circumference of the converter 1, reducing the possibility of scratches or even deformation on the outer circumference of the converter 1, and reducing the damage to the knocking piece 7 caused by long-term direct knocking on the converter 1, which is beneficial to protecting the converter 1 and the knocking piece 7.

[0107] In addition, the contact area between the pad and the converter 1 is larger than the contact area between the knocking piece 7 and the pad, which is beneficial to dispersing the knocking force of the knocking piece 7 to a larger area of ​​the outer peripheral surface of the converter 1, increasing the knocked area of ​​the converter 1, and facilitating cleaning of materials in a larger area of ​​the inner wall of the converter 1, thereby improving the cleaning efficiency.

[0108] Among them, the gasket includes multiple sections of gaskets arranged at preset distances along the circumference of the converter 1. The multiple sections of gaskets are spaced at preset distances, which is conducive to enabling the multiple sections of gaskets to adapt to the thermal expansion and contraction of the converter 1, and at the same time controlling the distance between two adjacent sections of gaskets, leaving enough margin for the thermal expansion of the gaskets and the converter 1, but not too large to reduce the possibility of the knocking piece 7 knocking on the gap between the two adjacent sections of gaskets, and ensuring that the multiple sections of gaskets are always in contact with the outer circumferential surface of the converter 1.

[0109] For example, when the converter 1 undergoes high-temperature thermal expansion, the gap between two adjacent gaskets increases, so that the two adjacent gaskets will not collide and squeeze and separate from the outer peripheral surface of the converter 1, thereby improving the connection reliability between the gasket and the outer peripheral surface of the converter 1, and making it difficult for the knocking member 7 to knock on the gap between the two adjacent gaskets through a preset distance. In some embodiments, the knocking frequency of the knocking member 7 can also be adjusted by the driving member 6 to cooperate with the rotation speed of the converter 1, which is conducive to reducing the possibility that the knocking member 7 knocks on the gap between the two adjacent gaskets.

[0110] For example, when the converter 1 shrinks during cooling, the gap between two adjacent gasket blocks decreases, which can reduce the possibility of the knocking member 7 hitting the gap between the two adjacent gasket blocks and prevent the two adjacent gasket blocks from colliding or squeezing each other by setting a preset distance.

[0111] The preset distance can be determined according to actual parameters such as the material and strength of the converter 1 . For example, the preset distance can be 1 to 3 cm, such as 1 cm, 2 cm, 3 cm, etc.

[0112] In some embodiments, the cushion block is arc-shaped to adapt to the outer peripheral surface shape of the converter 1, reduce the possibility of separation of the cushion block from the converter 1, and improve the connection reliability between the cushion block and the converter 1.

[0113] In some embodiments, the axial dimension of the gasket is 300-500 mm, and the thickness is 15-25 mm, which is beneficial for increasing the striking area while reducing the burden of the gasket on the converter 1, thereby facilitating the normal rotation of the converter 1.

[0114] In some embodiments, the cushion block is made of the same material as the converter 1, which can reduce the possibility of the converter 1 corroding due to the reaction between the cushion block and the converter 1 due to the high temperature during operation, thereby protecting the converter 1. The cushion block can be installed on the converter 1 by welding or other methods.

[0115] In some embodiments of the present invention, Figure 1-Figure 2As shown, there are a plurality of knocking devices 200 , and the plurality of knocking devices 200 are installed on the heat-insulating shell 5 at intervals along the axial direction of the converter 1 .

[0116] A single knocking device 200 can knock more areas of the converter 1 along the circumferential direction, and multiple knocking devices 200 arranged axially can knock more areas of the converter 1 along the axial direction. Therefore, multiple knocking devices 200 can knock more areas of the converter 1 along the axial direction and circumferential direction, thereby increasing the knocking range and improving the cleaning efficiency. Each knocking device 200 can be independently controlled, and by independently controlling each knocking device 200, multiple knocking devices 200 can knock on the converter 1 simultaneously or alternately, which is beneficial to control the knocking frequency of each area of ​​the converter 1 and improve the cleaning efficiency.

[0117] In some embodiments, the insulation shell 5 can be separated by insulation materials into multiple temperature zones spaced apart along the axial direction, each temperature zone can be provided with at least one electric heater, and each electric heater can be independently controlled by a programmable logic controller (PLC), so as to achieve different heating temperatures in each temperature zone to meet the requirements of sintering processes of different materials. For example, for the sintering process of lithium iron phosphate positive electrode materials, the multiple temperature zones of the insulation shell 5 constitute a heating section 101, a heat preservation section 102 and a cooling section 103, and at least one knocking device 200 can be correspondingly provided in the heating section 101 and the heat preservation section 102 with a higher temperature (for example, a temperature higher than a certain value), or at least one knocking device 200 can be correspondingly provided in the heating section 101, the heat preservation section 102 and the cooling section 103, so as to realize the knocking work in different temperature zones, and the cleaning efficiency of the entire converter 1 is higher. In some embodiments, a knocking device 200 can be set corresponding to each temperature zone in the heating section 101 and the insulation section 102. Of course, the number and location of the knocking devices 200 can be set according to actual needs. For example, more than one knocking device 200 can be set according to the temperature zone where the material adhesion is relatively more serious.

[0118] Based on the demand for increased production capacity, current rotary sintering furnaces tend to be large-scale. For example, the converter of some rotary sintering furnaces can be built over 50 meters. For a larger converter, based on the consideration of support stability and rotation torque, it is necessary to support and drive it in the middle of the converter. In some embodiments, such as Figure 1As shown, the heating section 101, the insulation section 102 and the cooling section 103 of the insulation shell 5 are arranged at intervals; the converter 1 includes a furnace head 11, a first furnace section, a second furnace section and a third furnace section, the first furnace section corresponds to the heating section 101 of the insulation shell 5, the second furnace section corresponds to the insulation section 102 of the insulation shell 5, and the third furnace section corresponds to the cooling section 103 of the insulation shell 5, the connection between the first furnace section and the second furnace section, and the connection between the second furnace section and the third furnace section are both exposed outside the insulation shell 5, and supporting devices are provided in front of the heating section 101, between the heating section 101 and the insulation section 102, between the insulation section 102 and the cooling section 103, and behind the cooling section 103 to support the converter 1.

[0119] In some embodiments, the knocking device 200 also includes a pneumatic knocking hammer 400, which is externally disposed on the furnace body assembly 100 and is correspondingly disposed outside the converter 1 between the furnace head 11 and the first furnace section, between the first furnace section and the second furnace section, and between the second furnace section and the third furnace section, so as to directly knock on the portion of the converter 1 exposed outside the insulation shell 5. Thus, the pneumatic knocking hammer 400 will not directly contact the material in the converter 1, so as to avoid interference of the pneumatic knocking hammer 400 with the material transportation and heating, and the knocking time, frequency and knocking force are more intuitive and controllable.

[0120] During the sintering process of lithium iron phosphate materials in a rotary sintering furnace, due to the characteristics of the lithium iron phosphate material itself, the material is easy to stick to the inner wall of the converter or the spiral blades in the converter. Since the temperature of the first furnace section gradually increases from the feed box to the second furnace section, and the temperature of the second furnace section is kept at a higher constant temperature, the material in the first furnace section near the second furnace section and in the second furnace section is more likely to be over-sintered or react with the furnace wall material of the converter due to the local sintering temperature after sticking to the furnace wall and the spiral blades, thereby causing material loss or impurities in the product.

[0121] The present application sets the pneumatic percussion hammer 400 between the furnace head 11 and the first furnace section, and between the first furnace section and the second furnace section, which is conducive to knocking off the materials that are bonded in the first furnace section and the second furnace section. The pneumatic percussion hammer 400 is set between the first furnace section and the second furnace section, and between the second furnace section and the third furnace section, and cooperates with the percussion device 200 set in the second furnace section, which is conducive to effectively knocking the materials that are bonded in the second furnace section. Therefore, by setting the pneumatic percussion hammer 400, it is conducive to knocking near the easily bonded overburned materials of the converter 1, and the bonded materials can be knocked off more effectively.

[0122] Specifically, the pneumatic hammer 400 may include an air source device and an air hammer knocker, wherein the air source device is used to drive the air hammer knocker to knock the converter 1. The air hammer knocker is pneumatically driven, and uses compressed air compressed by an air compressor to drive the air hammer knocker to knock the converter 1. The knocking frequency and knocking strength of the air hammer knocker are controlled by the air source device, so that the knocking process is adjustable and controllable to match different actual needs.

[0123] Therefore, by means of the knocking device 200 arranged at the furnace section and the pneumatic knocking hammer 400 arranged between adjacent furnace sections, the part of the converter 1 that is prone to adhesion of overburned materials and its accessories can be knocked, thereby further improving the cleaning efficiency.

[0124] In some embodiments of the utility model, the polishing degree Ra of the furnace cavity wall surface of the converter 1 is less than or equal to 3μm, so that the furnace cavity wall surface of the converter 1 is relatively smooth, which is conducive to reducing the bonding rate of the material. For example, the polishing degree Ra of the furnace cavity wall surface of the converter 1 is 0.2μm, 0.8μm, 1.2μm, 3μm, etc. Especially for lithium-ion battery positive electrode materials, making the furnace cavity wall surface polishing degree Ra of the converter 1 less than or equal to 3μm has a better effect of reducing the bonding rate of lithium-ion battery positive electrode materials during the sintering process.

[0125] In some embodiments of the utility model, the material of the converter 1 is stainless steel or alloy, so that the converter 1 has good high temperature resistance, which is conducive to the smooth progress of high temperature sintering work and has good economy. For example, the material of the converter 1 can be selected from 304 stainless steel, 310S stainless steel, Inconel601 / 625 alloy, etc., which have 1000-1200°C or higher temperature resistance, and have excellent stainless corrosion resistance and good intergranular corrosion resistance, which can effectively improve the introduction of magnetic materials into lithium iron phosphate during high temperature sintering.

[0126] In some embodiments, the material of the bracket 9 may be stainless steel or alloy, so that the bracket 9 has a higher strength, which is conducive to maintaining the installation stability of the striking device 200 installed on the bracket 9. For example, the material of the bracket 9 is steel.

[0127] In some embodiments, Figure 3-Figure 5 As shown, the bracket 9 has a top frame 92, a vertical frame 91 and a bottom frame 93, the top frame 92 and the bottom frame 93 are connected by the vertical frame 91, and the bracket 9 is installed on the top of the insulation shell 5 through the bottom frame 93. The guide wheel 81 is arranged on the top frame 92, the bottom frame 93 is provided with a guide cylinder 94, the guide cylinder 94 defines a guide hole 95, and the driving member 6 is installed on the vertical frame 91, so that the structure of the bracket 9 is simple and convenient to install, and the practicality is strong. In some embodiments, the bottom frame 93 includes a bottom plate, and the bracket 9 is installed on the insulation shell 5 through the bottom plate, an inclined support plate is arranged between the bottom frame 93 and the vertical frame 91, and an inclined support plate is arranged between the top frame 92 and the vertical frame 91, which is conducive to improving the structural stability of the bracket 9.

[0128] In some embodiments, the bracket 9 is provided with a plurality of mounting positions, specifically, the top frame 92 is provided with a plurality of mounting positions, the plurality of mounting positions are arranged spaced apart along the axial direction of the converter 1, and correspond to the positions of the plurality of guide holes 95 for installing the knocking member 7, and the second guide wheel is selectively installed at the mounting position to realize that the position of the second guide wheel along the axial direction of the converter 1 is adjustable, so that after the pull rope 82 is wound around the second guide wheel for reversing, the knocking member 7 can correspondingly pass through the guide hole or through hole to knock on the converter 1, so that part of the pull rope between the second guide wheel and the knocking member 7 can be closer to or the same as the extension direction of the knocking member 7, so as to reduce the resistance of the pull rope 82 to drive the knocking member 7 to move. The driving member 6 can be installed on the vertical frame 91 in the vertical direction, so that the device structure is more simple and reasonable, and can save space.

[0129] In some embodiments, each mounting position of the top frame 92 is provided with a mounting screw hole, and the bracket 9 also includes a plurality of angle brackets and fixing bolts. The second guide wheel is installed at the mounting position through the angle brackets and fixing bolts. Of course, the second guide wheel can also be installed at the mounting position through other structures and other methods.

[0130] The bracket 9 can integrate the structure of the knocking device 200, and can be directly installed on the top of the insulation shell 5 through the bottom plate. There is no need to set up a structure for installing the bracket 9 outside the insulation shell 5, nor is there any need to add a structure connecting the bracket 9 and the insulation shell 5. There is no need to add an additional fixed structure or power drive structure, which is convenient for disassembly and assembly operations, and is convenient for installation at a designated position of the rotary sintering furnace 1000 for knocking cleaning.

[0131] In addition, the knocking device 200 has an independent driving device. For example, by adjusting the driving member 6, that is, adjusting the working time and working frequency of the cylinder, the knocking timing and knocking frequency can be controlled, so that the knocking can be performed flexibly and timely according to the sintering process of a specific material and the actual bonding situation during the sintering process. For example, the knocking can be performed during the sintering process, or after the sintering is completed, or both during the sintering process and after the sintering is completed. The knocking can be performed by setting the knocking time point, such as knocking every few minutes, or knocking every few seconds, or high-frequency knocking is performed in the early stage of the sintering process, and low-frequency knocking is performed in the later stage of the sintering process, etc.

[0132] Other structures and operations of the rotary sintering furnace 1000 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0133] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0134] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0135] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotary sintering furnace, characterized in that: include: A furnace body assembly, the furnace body assembly comprising a converter and a heat-insulating shell, the converter is rotatably arranged in the heat-insulating shell, and the heat-insulating shell is provided with a through hole; a knocking device, the knocking device being arranged outside the heat-insulating shell, and the knocking device comprising a knocking member, the knocking member being movable through the through hole and knocking on the converter, The knocking device also includes a bracket and a driving member, wherein the bracket is mounted on the heat-insulating shell, the driving member is located outside the heat-insulating shell and mounted on the bracket, and the knocking member is connected to the driving member. The knocking member is suitable for reciprocating under the driving of the driving member and passing through the through hole to knock on the converter; or, The knocking member is suitable for reciprocating under the action of gravity and the driving member, and passes through the through hole to knock on the converter.

2. The rotary sintering furnace according to claim 1, characterized in that: The bracket is provided with a guide wheel, and the driving member is connected to the knocking member through a pull rope, the pull rope is wound around the guide wheel, the part of the pull rope located between the guide wheel and the knocking member extends in the vertical direction, and the part of the pull rope located between the guide wheel and the driving member extends along the driving direction of the driving member, and the driving direction of the driving member is inconsistent with the movement direction of the knocking member.

3. The rotary sintering furnace according to claim 2, characterized in that: There are at least two guide wheels, which are the first guide wheel and the second guide wheel respectively. The first guide wheel and the second guide wheel are arranged apart from each other. The position of the second guide wheel along the axial direction of the converter is adjustable. One end of the pull rope is connected to the driving member, and the other end of the pull rope is connected to the knocking member. The pull rope is sequentially wound around the first guide wheel and the second guide wheel and then connected to the knocking member.

4. The rotary sintering furnace according to claim 3, characterized in that: The bracket is provided with a plurality of guide holes opposite to the through holes, the plurality of guide holes are arranged at intervals along the axial direction of the converter, and the knocking member is selectively penetrated into the guide holes.

5. The rotary sintering furnace according to claim 4, characterized in that: The bracket is provided with a plurality of mounting positions, which are spaced apart and arranged along the axial direction of the converter and correspond to the positions of the plurality of guide holes, and the second guide wheel is selectively mounted at one of the mounting positions.

6. The rotary sintering furnace according to claim 1, characterized in that: The bracket is provided with a guide hole opposite to the through hole, and the knocking member is movably inserted into the guide hole.

7. The rotary sintering furnace according to claim 4, characterized in that: The bracket includes a top frame, a vertical frame and a bottom frame, the top frame and the bottom frame are connected through the vertical frame, and the bracket is installed on the top of the insulation shell through the bottom frame; the guide wheel is arranged on the top frame, the bottom frame is provided with a guide cylinder, the guide cylinder defines the guide hole, and the driving member is installed on the vertical frame.

8. The rotary sintering furnace according to claim 1, characterized in that: The length of the knocking member is greater than the distance between the axial outer end of the through hole and the outer peripheral surface of the converter.

9. The rotary sintering furnace according to claim 4 or 6, characterized in that: The knocking member includes a knocking segment and a plurality of connecting segments which are connected in sequence along the direction of movement, the end of the knocking segment knocks on the converter, and the connecting segment is connected to the driving member; the cross-sectional area of ​​the knocking segment perpendicular to the direction of movement is larger than the cross-sectional area of ​​the connecting segment perpendicular to the direction of movement, and the cross-sectional area of ​​the knocking segment perpendicular to the direction of movement is smaller than the cross-sectional area of ​​the guide hole perpendicular to the penetration direction, and the cross-sectional area of ​​the knocking segment perpendicular to the direction of movement is smaller than the cross-sectional area of ​​the through hole perpendicular to the penetration direction.

10. The rotary sintering furnace according to claim 4 or 6, characterized in that: The knocking piece is provided with a weighted weight.

11. The rotary sintering furnace according to claim 10, characterized in that: The weighted weight is installed on the striking piece and is located on the side of the guide hole facing away from the through hole; and the distance between the bottom of the weighted weight and the end of the striking piece is L1, and the distance between the axial outer end of the guide hole and the outer peripheral surface of the converter is L2, L1≥L2.

12. The rotary sintering furnace according to claim 2, characterized in that: The driving member has a driving end connected to the pull rope, the driving end is movable, there is one guide wheel, the part of the pull rope located between the guide wheel and the driving end extends parallel to the moving direction of the driving end, and the part of the pull rope located between the guide wheel and the knocking member extends parallel to the penetration direction of the through hole.

13. The rotary sintering furnace according to claim 1, characterized in that: A gasket is provided on the outer circumferential surface of the converter. The gasket includes a plurality of gasket blocks arranged at a preset distance along the circumference of the converter. The knocking member acts on the converter by knocking the gasket blocks.

14. The rotary sintering furnace according to claim 13, characterized in that: The cushion block is made of the same material as that of the converter.

15. The rotary sintering furnace according to claim 1, characterized in that: There are a plurality of knocking devices, and the plurality of knocking devices are installed on the heat-insulating shell at intervals along the axial direction of the converter.

16. The rotary sintering furnace according to claim 1, characterized in that: The furnace cavity wall surface polishing degree Ra of the converter is less than or equal to 3 μm; and / or the converter is made of stainless steel or alloy.

17. The rotary sintering furnace according to claim 1, characterized in that: The rotary sintering furnace is used in the preparation of new energy materials to dynamically sinter raw materials. The new energy materials include lithium-ion battery positive electrode materials, and the lithium-ion battery positive electrode materials include lithium iron phosphate, lithium cobalt oxide or lithium nickel cobalt manganese oxide.

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