Transport system for cathode active materials

Abstract

The present invention relates to a transport system for transporting a cathode material to a calcination furnace in a cathode material calcination process. Proposed is a method in which a skid rail is constructed using rail pieces that are easy to assemble and disassemble, and do not form discontinuous points at coupling joints, and thus it is possible to prevent an overturning accident caused by collision of a large tray, in which a cathode active material is loaded, with the discontinuous points during a cathode material calcination process.

Description

Anode material transport system

[0001] The present invention relates to a skid rail used when transporting a refractory containing a cathode material to a kiln, and more specifically, to a moving system for reducing friction between the skid rail and a plate on which the refractory is mounted, thereby reducing cases in which the refractory is transferred within the kiln.

[0002]

[0003] In the secondary battery cathode material production process, the RHK (Roller Hearth Kiln) method and PK (Pusher Kiln) method are mainly used in the sintering process of heating the cathode material inside the sintering furnace.

[0004] In the case of the RHK method, the anode material is mounted on a roller and the sintering process is continuously processed. The sintering furnace is operated precisely in the range of 800 to 1200°C, and high-level gas atmosphere control allows for the production of high-quality materials. In addition, the driving load is distributed throughout the sintering furnace, which is advantageous for stable continuous production. However, it has the disadvantage of relatively high investment and maintenance costs.

[0005] In contrast, the PK method is a method in which a double-layered saggar loaded with anode material is placed on a plate and the plate is pushed with a pusher to perform a firing process.

[0006] The PK method has the advantage of being able to operate the kiln at an ultra-high temperature of 2400°C and of having a refractory case loaded with the cathode material stacked in more layers than the RHK method, resulting in lower operating and maintenance costs compared to the RHK method. However, it also has the disadvantage of not being able to precisely control the series of kiln processes, and is therefore generally not preferred for secondary battery production, which requires a high degree of process precision.

[0007] For this reason, the technology for the secondary battery cathode material sintering process disclosed in the patent registration No. 10-2368361 prior to this application only introduces the sintering process using the RHK method.

[0008] The biggest problem with the PK method is that when the pusher pushes the plate to transport it, the plate collides with the discontinuity between the rail pieces that make up the skid rail.

[0009] The vertical load acting on the above skid rail is proportional to the weight of the anode material transported by the above plate, and the vertical load causes a micro-sag in the joint between the rail pieces.

[0010] As the above-mentioned deflection amount increases, the amount of impact due to collision with the plate increases, which can cause excessive wear on the rail piece and shorten its lifespan.

[0011] Furthermore, the excessive impact may be a major cause of an accident in which the plate overturns within the kiln.

[0012] Therefore, in order to utilize the advantages of mass productivity and low maintenance cost of the existing PK method in the cathode material sintering process, it is essential to develop a new cathode material moving system that can solve the collision problem between the skid rail and the plate.

[0013]

[0014] The present invention has been devised to solve the above-described problem, and aims to increase the precision of the sintering process by minimizing discontinuities in the connection between rail pieces constituting a skid rail due to a large plate on which a heavy load is placed.

[0015] In addition, the purpose is to improve maintainability by disassembling the skid rail so that it can be easily disassembled into rail pieces.

[0016] In addition, it is an object of the present invention to provide a method for minimizing wear on the skid rail due to friction between the skid rail and the plate.

[0017] In addition, the purpose is to provide a skid rail system in which a heating wire installed inside the above-mentioned kiln can be easily installed.

[0018] In addition, the purpose is to provide a method for increasing the life of the skid rail by minimizing wear between the skid rail and the plate.

[0019] The objectives of the present invention are not limited to those mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0020]

[0021] In order to solve the above-described problem, the present invention is configured to include a transport system for transporting a cathode material raw material in a secondary battery cathode material sintering process, comprising: a sintering furnace (800) for heating the cathode material raw material; a skid rail (100) installed at the bottom of the sintering furnace (800); and a plate (300) moving along the skid rail (100) and on which a refractory box (400) containing the cathode material raw material is mounted; wherein the skid rail (100) is characterized in that a plurality of rail pieces (105) are mutually coupled to each other, each rail piece comprising a main body (110), a protrusion (120) extending from one end of the main body (110), and a receiving portion (150) formed on one end of the main body (110) to receive the protrusion (120).

[0022] In one embodiment of the present invention, it may be characterized in that a support (200) is interposed at the lower end of the joint surface between the protrusion (120) of one rail piece (105) and the receiving portion (150) of another rail piece (105) that is coupled to face each other.

[0023] In one embodiment of the present invention, it may be characterized in that a connecting portion (130) formed by gradually reducing the cross-section of the protrusion (120) is integrally formed at the end of the protrusion (120).

[0024] In one embodiment of the present invention, the receiving portion (150) may be characterized in that a receiving groove (1512) that is connected to the connecting portion (130) is formed.

[0025] In one embodiment of the present invention, a first coupling guide portion (1311) having a predetermined curvature is disposed on a boundary line between the protrusion (120) and the coupling portion (130) and a boundary line between the coupling portion (130) and the attachment surface (140) which is a free end of the coupling portion (130), and a second coupling guide portion (1511) having a curvature corresponding to the first coupling guide portion (1311) is formed on a coupling surface of the receiving portion (150) and the receiving groove (1512) which are coupled to correspond to each of the first coupling guide portions (1311).

[0026] In one embodiment of the present invention, the protrusions (120) are formed to extend along the side surface of the end of the main body (110), and each of the protrusions (120) may be formed symmetrically in the longitudinal direction of the main body (110).

[0027] In one embodiment of the present invention, a fixing groove (520) is formed through each of the protrusion (120) and the support (200) located at the bottom of the protrusion, and a fixing pin (510) is inserted into the fixing groove (520).

[0028] In one embodiment of the present invention, the protrusion (120) may be formed by two first protrusions (121) extending along both sides from one end of the main body (110) and a second protrusion (122) extending from the center of the other end of the main body (110), and the receiving portion (150) may be formed by a first receiving portion (151) positioned between the two first protrusions (121) and receiving the second protrusions (122), and a second receiving portion (152) positioned on both sides of the second protrusions (122) and receiving the two first protrusions (121).

[0029] In one embodiment of the present invention, it may be characterized in that a support (200) is interposed at the lower end of the joint surface between the first protrusion (121) of one rail piece (105) and the second receiving portion (152) of another rail piece (105) that are coupled to each other.

[0030] In one embodiment of the present invention, a fixing groove (520) is formed through each of the first protrusion (121) and the second protrusion (122) and the support (200) interposed at the lower end of the first protrusion (121) and the second protrusion (122), and a fixing pin (510) is inserted into the fixing groove (520).

[0031] In one embodiment of the present invention, it may be characterized in that a plurality of heating wires (700) for heating the cathode material are arranged between the plurality of supports (200).

[0032] In one embodiment of the present invention, the second protrusion (122) may be characterized in that a connecting portion (130) having a diameter larger than that of the second protrusion (122) and smaller than that of the main body (110) is integrally formed at the end of the second protrusion (122).

[0033] In one embodiment of the present invention,

[0034] It may be characterized in that a second coupling inducing portion (1511) and a first coupling inducing portion (1311) having a predetermined curvature are formed at the upper end of the boundary line between the first receiving portion (151) and the first protrusion (121) and at the upper end of the boundary line between the connecting portion (130) and the second receiving portion (152), respectively.

[0035] In one embodiment of the present invention, the protrusion (120) is composed of a first protrusion (121) extending along the upper surface of one end of the main body (110) and a second protrusion (122) extending along the lower surface of the other end of the main body (110), and a first connecting portion (131) having an 'ㄱ' cross-section is formed at the end of the first protrusion (121), and a second connecting portion (132) having an 'ㄴ' cross-section is formed at the end of the second protrusion (122), and the receiving portion (150) is a first receiving portion (151) located between the first connecting portion (131) and the first protrusion (121) and accommodating the second connecting portion (132), and a second receiving portion (151) located between the second connecting portion (132) and the second protrusion (122) and accommodating the first connecting portion (131). It can be characterized by being composed of a second receiving section (152).

[0036] In one embodiment of the present invention, it may be characterized in that an inclined surface (1312) having a predetermined angle is formed on one side of the first connecting portion (131) and the second connecting portion (132).

[0037] In one embodiment of the present invention, it may be characterized in that a heat receiving portion (180) is formed at the bottom of the rail piece (105) through which a plurality of heat wires (700) for heating the cathode material pass.

[0038]

[0039] According to various embodiments, the precision of the sintering process control can be increased by minimizing the discontinuity between the rail pieces constituting the skid rail.

[0040] In addition, the rail pieces that make up the skid rail can be easily disassembled and installed, thereby minimizing the cost and time required for maintenance.

[0041] Additionally, the life of the skid rail can be extended to the maximum extent by minimizing friction or impact force between the skid rail and the plate.

[0042] In addition, the controllability of the firing process can be improved by densely installing heating wires under the refractory shell.

[0043] In addition, the purpose is to provide a method for increasing the life of a skid rail by minimizing wear between the skid rail and the plate.

[0044]

[0045] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0046]

[0047] Figure 1 is a schematic diagram showing skid rails arranged alternately in the longitudinal direction in a conventional cathode material sintering process of the PK method.

[0048] Figure 2 is a perspective view of a unit rail piece constituting the skid rail in the conventional cathode material sintering process of the PK method.

[0049] Figure 3 is an operating diagram showing that the plate collides with the skid rail discontinuity, causing damage to the unit rail pieces constituting the skid rail.

[0050] Figure 4 is a perspective view and a cross-sectional view of a unit block according to one embodiment of the present invention.

[0051] Figure 5 is a cross-sectional view of a unit block according to one embodiment of the present invention.

[0052] Figure 6 is a perspective view and a front view of a unit block according to one embodiment of the present invention.

[0053] Figure 7 is a schematic diagram showing the arrangement of a skid rail according to one embodiment of the present invention.

[0054] Figure 8 is a perspective view and a cross-sectional view of a unit block according to one embodiment of the present invention.

[0055] Figure 9 is a front view and a side view of a unit block according to one embodiment of the present invention.

[0056] Figure 10 is a side view and an enlarged side view of the combined state of a unit block according to one embodiment of the present invention.

[0057] FIG. 11 is a schematic diagram showing a heating system arranged on the lower part of a completed skid rail according to one embodiment of the present invention.

[0058] FIG. 12 is a schematic diagram illustrating a modified example in which a heating system is arranged on the lower part of a completed skid rail according to one embodiment of the present invention.

[0059] FIG. 13 is a schematic diagram showing a completed skid rail placed inside a kiln according to one embodiment of the present invention.

[0060] Figure 14 is a schematic diagram showing skid rails arranged in a straight line according to one embodiment of the present invention.

[0061]

[0062] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification.

[0063] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0064] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0065] Hereinafter, the phrase "any configuration is placed on (or below)" a component or "on (or below)" a component may mean that any configuration is placed in contact with the upper surface (or lower surface) of said component, and that other configurations may be interposed between said component and any configuration placed on (or below) said component.

[0066] Additionally, when it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through another component.

[0067] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0068] Throughout the specification, when we refer to "A and / or B", this means A, B, or A and B, unless otherwise stated, and when we refer to "C to D", this means C or more and D or less, unless otherwise stated.

[0069]

[0070] Hereinafter, a cathode material transfer system according to various embodiments will be described in detail with reference to the attached drawings.

[0071]

[0072] Figures 1 to 3 illustrate some of the work processes of a conventional cathode material sintering process using the PK method.

[0073] The above-mentioned sintering process is largely composed of a sintering furnace (800) for heating the cathode material raw material, a skid rail (100) installed in the sintering furnace (800), and a plate (300) on which a saggar containing the cathode material raw material is placed.

[0074] In particular, FIG. 3 illustrates that when a large plate (300) carrying a heavy load moves on a skid rail (100) composed of a plurality of rail pieces (105) arranged in a zigzag pattern by the operating force of a pusher (500), an impact is applied between the large plate (300) and the rail pieces (105) due to a discontinuity that exists in the joint between the rail pieces (105).

[0075] Although Figure 3 only shows the rail piece being broken by the above impact, it is of course possible that the anode material loaded on the plate (300) may be conducted inside the kiln (800) at times.

[0076] Since the inside of the above-mentioned kiln (800) is maintained at a high temperature, if a refractory case (400) falls or a skid rail (100) breaks, the entire kiln process must be stopped until it is repaired, and it will take a lot of time and money to restart the process.

[0077]

[0078] [First embodiment]

[0079] Figure 4 shows one embodiment of a rail piece (105) proposed in the present invention to solve such a problem.

[0080] In the case of existing rail pieces, the skid rails (100) are arranged in a zigzag pattern, which physically creates a discontinuity point.

[0081] Accordingly, the rail piece (105) presented in this embodiment is composed of a main body (110), a protrusion (120) formed extending from each of the upper ends of the main body (110), a receiving portion (150) formed on one side of the upper ends of the main body (110) to receive the protrusion (120), and a support receiving portion (170) at the bottom of the protrusion (120) and the receiving portion (150), and the skid rail (100) completed by assembling the plurality of rail pieces (105) has a straight shape, unlike the conventional one.

[0082] First, the above protrusion (120) is located in the receiving portion (150) of another rail piece (105).

[0083] In addition, at the end of the protrusion (120), a connecting portion (130) is formed extending so that the cross-section of the protrusion (120) gradually reduces to have a free end, which is an attachment surface (140).

[0084] The above-mentioned connecting portion (130) has a receiving groove (1512) formed inside the receiving portion (150) of the main body (110) to be connected to the connecting portion (130).

[0085] The attachment surface (140) of the above-mentioned connecting portion (130) may not be in contact with the end of the receiving groove (1512).

[0086] The above rail piece (105) is located in the above kiln (800) which is operated at various temperatures, and accordingly, the rail piece (105) can be elongated or contracted, so the size or depth of the connecting portion (130) and the attachment groove (1512) must be determined taking into account the amount of change.

[0087] A first coupling inducing portion (1311) having a predetermined curvature is arranged on the boundary line between the protrusion (120) and the coupling portion (130) and the boundary line between the coupling portion (130) and the attachment surface (140), which is the free end of the coupling portion (130).

[0088] One of the causes of the collision between the existing plate (300) and the skid rail (100) is that the boundary line where the shape of the existing rail piece (105) changes is composed of a straight line, which causes a collision with the plate (300) which is also composed of a straight square.

[0089] Accordingly, the first coupling inducing portion (1311), which is a boundary line where the shape is changed, is configured with a predetermined curvature to increase the transition section, thereby minimizing the impact caused by friction with the plate (300).

[0090] Likewise, the fastening surface of the receiving portion (150) and receiving groove (1512) that are fastened in correspondence with each of the first fastening inducing portions (1311) is formed with a second fastening inducing portion (1511) having a corresponding curvature, so that the fastening between the rail pieces (105) can be smoothly performed.

[0091] At this time, the protrusions (120) are formed to extend along the side surface of the end of the main body (110) as shown in FIG. 4, and each protrusion (120) is formed symmetrically with respect to the longitudinal direction of the main body (110).

[0092] Accordingly, when the rail pieces (105) are interconnected, the upper part that rubs against the plate (300) has a constant surface without any discontinuity.

[0093] The purpose of completing the skid rail (100) by combining multiple rail pieces (105) in this way is to efficiently deal with wear of the skid rail (100) that inevitably occurs during the cathode material sintering process.

[0094] If the above skid rail (100) is made of only one body, the entire skid rail (100) must be replaced if damage occurs to the skid rail (100) due to high heat, friction, impact, vibration, etc. that inevitably occur in the operating environment of the kiln (800).

[0095] In addition, the length adjustment of the skid rail (100), which may change from time to time depending on the process and internal circumstances of the factory, is also limited.

[0096] The first coupling inducing part (1311) and the second coupling inducing part (1511) do not necessarily have to have the same curvature, and the curvature of the second coupling inducing part (1511) may be made greater than that of the first coupling inducing part (1311) to facilitate coupling.

[0097] In this embodiment, the joining surface between the receiving portion (150) of the rail piece (105) facing and joining the protrusion (120) of one rail piece (105) is located at the upper end of the support receiving portion (170).

[0098] Since the above-mentioned joining surface is connected only by the joining between the joining portion (130) and the receiving groove (1512) without any particular fastening force, it is difficult to maintain the above-mentioned arrangement when the above-mentioned large plate (300), which is a heavy body, passes through.

[0099] Accordingly, by interposing a support (200) in the support receiving portion (170), the entire skid rail (100) can be fixed to support a load in the longitudinal or transverse direction.

[0100] The above support (200) serves to complement the structural weakness of the joint of the rail piece (105) and provides a space in which a plurality of heating wires (700) are arranged so that the anode material contained within the multilayer refractory armor (400) loaded on the plate (300) can be heated within the kiln (800).

[0101] As illustrated in FIG. 5, the rail piece (105) of the present embodiment may have a fixing groove (520) formed through the protrusion (120) and the support body (200) interposed between the support body receiving portion (170) located at the bottom of the protrusion (120) to make the mutual connection more solid. At this time, a fixing pin (510) may be inserted into the fixing groove (520) to further reinforce the fastening force between the rail pieces (105).

[0102]

[0103] [Second Embodiment]

[0104] Figure 6 illustrates a second embodiment of a rail piece of the present invention.

[0105] In this embodiment, the protrusion (120) is composed of two first protrusions (121) extending along both sides from one end of the main body (110) and a second protrusion (122) extending from the center of the other end of the main body (110), so that each end of the rail piece (105) has an asymmetrical shape.

[0106] The above-mentioned receiving portion (150) may be composed of a first receiving portion (151) positioned between the two first protrusions (121) and receiving the second protrusions (122), and a second receiving portion (152) positioned on both sides of the second protrusions (122) and receiving the two first protrusions (121).

[0107] In the case of the rail piece (105) of the present embodiment, the rail piece (105) in the first embodiment is installed asymmetrically with respect to the length direction of the main body (110), thereby compensating for a structure that is mechanically vulnerable to lateral load.

[0108] The rail piece (105) of the present embodiment is symmetrical in the longitudinal direction of the main body (110) as shown in FIG. 6, and since there are three joint positions between a pair of rail pieces (105) that are mutually coupled, a more stable fastening structure can be maintained.

[0109] When a pair of rail pieces (105) are coupled to each other, the first coupling surface between the first protrusion (121) of one rail piece (105) and the second receiving portion (152) of the rail piece (105) that is coupled facing each other on one side, and the second coupling surface between the second protrusion (122) of one rail piece (105) and the first receiving portion (151) of the rail piece (105) that is coupled facing each other on the other side, are each located at the upper end of the support receiving portion (170).

[0110] In this embodiment, the rail piece (105) is also formed by connecting the protrusion and the receiving portion along the upper surface of the main body (110) as in the first embodiment, so that a support (200) can be interposed in the support receiving portion (170) at the lower end of the first and second joining surfaces in order to withstand the load of the plate (300) projected in the vertical direction.

[0111] The above support (200) serves to complement the structural weakness of the joint of the rail piece (105), and at the same time, can provide a space in which a plurality of heating wires (700) can be placed so that the anode material contained within the multi-layer refractory armor (400) loaded on the plate (300) can be heated within the kiln (800).

[0112] In order to make the connection of the rail pieces (105) more secure, as shown in FIG. 5, a fixing groove (520) penetrating through each of the above components may be formed in the support body (200) interposed in the support body receiving portion (170) at the bottom of each of the first protrusion (121) and the second protrusion (122), and a fixing pin (510) may be inserted into the fixing groove (520) to reinforce the fastening force between the rail pieces (105).

[0113] In addition to reinforcing the fastening force, the above-mentioned configuration of the fixing groove (520) and the fixing pin (510) also has the effect of reducing the possibility of a discontinuous surface occurring at the joint between the rail pieces (105) during use due to a high load during transport of the anode material.

[0114] The cross sections of the first protrusion (121) and the second protrusion (122) are formed such that the first connecting portion (131) and the second connecting portion (132) are formed by gradually reducing the cross sections of the first protrusion (121) and the second protrusion (122), respectively, and a receiving portion that is fastened to the first protrusion (121) and the second protrusion (122) can be formed in the first receiving portion (151) and the second receiving portion (152), respectively.

[0115] A first coupling inducing portion (1311) having a predetermined curvature is arranged at the boundary between the first protrusion (121) and the first coupling portion (131) and between the second protrusion (122) and the second coupling portion (132). A first coupling inducing portion (1311) having a predetermined curvature can also be arranged at the boundary between the first coupling portion (131) and the second coupling portion (132) and the free end.

[0116] Of course, the second coupling inducing portion (1511) may also be formed on the coupling surface of the first receiving portion (151) and the second receiving portion (152) and the receiving groove (1512) that are connected correspondingly to the first protrusion (121), the second protrusion (122), the first coupling portion (131) and the second coupling portion (132).

[0117] The roles of each of the above-mentioned connecting portions and receiving portions are the same as those described in the first embodiment.

[0118] Figure 7 schematically shows the configuration of a completed skid rail (100) applied to a cathode material transport system by connecting the rail pieces (105) proposed in the first and second embodiments.

[0119] In the case of the skid rail (100) configured by combining rail pieces (105) proposed in the present invention, unlike the existing skid rail (100) configured in a zigzag shape, the rail pieces (105) are connected in the longitudinal direction, so the possibility of a discontinuity occurring at the joint is reduced.

[0120] In addition, FIG. 7 illustrates a partial operation diagram of the kiln (800) in which a plurality of heating wires (700) are arranged between the gaps between the supports (200) of the first and second embodiments.

[0121]

[0122] [Third Embodiment]

[0123] Figure 8 illustrates a third embodiment of a rail piece of the present invention.

[0124] In this embodiment, the skid rail (100) is configured by connecting a plurality of rail pieces (105) that are formed by a main body (110), protrusions (120) extending from each end of the main body (110), and receiving portions (150) formed on one side of each end of the main body (110) to receive the protrusions (120).

[0125] In this embodiment, a configuration is proposed in which the rail piece is installed on the bottom of the kiln (800) instead of the support (200).

[0126] As in the above-described embodiment, a connecting portion (130) is formed extending from the end of the protrusion (120) so that the cross-section of the protrusion (120) gradually reduces to have a free end, which is an attachment surface (140).

[0127] The above-mentioned connecting portion (130) has a receiving groove (1512) formed inside the receiving portion (150) of the main body (110) to be connected to the connecting portion (130).

[0128] The attachment surface (140) of the above-mentioned connecting portion (130) may not be in contact with the end of the receiving groove (1512).

[0129] The above rail piece (105) is located in the above kiln (800) which is operated at various temperatures, and accordingly, the rail piece (105) can be elongated or contracted, so the size of the connecting portion (130) and the receiving groove (1512) must be determined taking into account the amount of change.

[0130] A first coupling inducing portion (1311) having a predetermined curvature may be arranged on the boundary line between the protrusion (120) and the coupling portion (130) and the boundary line between the coupling portion (130) and the attachment surface (140).

[0131] One of the causes of the collision between the existing plate (300) and the skid rail (100) is that the boundary line where the shape of the existing rail piece (105) changes is composed of a straight line, which causes a collision with the plate (300) which is also composed of a straight square.

[0132] Accordingly, the first coupling inducing portion (1311), which is a boundary line where the shape is changed, is configured with a predetermined curvature to increase the transition section, thereby minimizing the impact caused by friction with the plate (300).

[0133] Likewise, the fastening surface of the receiving portion (150) and receiving groove (1512) that are fastened in correspondence with each of the first fastening inducing portions (1311) is formed with a second fastening inducing portion (1511) having a corresponding curvature, so that the fastening between the rail pieces (105) can be smoothly performed.

[0134] At this time, the protrusions (120) are formed to extend along the side surface of the end of the main body (110), and each protrusion (120) is formed symmetrically with respect to the longitudinal direction of the main body (110).

[0135] Accordingly, when the rail pieces (105) are interconnected, the upper part that rubs against the plate (300) has a uniform surface that continues without any discontinuity.

[0136] The first coupling inducing part (1311) and the second coupling inducing part (1511) do not necessarily have to have the same curvature, and the curvature of the second coupling inducing part (1511) may be made greater than that of the first coupling inducing part (1311) to facilitate coupling.

[0137] A heat receiving portion (180) through which a plurality of heat wires (700) pass for heating the cathode material may be formed on the bottom surface of the rail piece (105) that is in contact with the bottom of the above-mentioned furnace (800).

[0138] In this embodiment, the heating wire (700) is positioned closer to the refractory (400), unlike other embodiments that use the support (200), so that the firing process can be performed more efficiently, and on the other hand, it has the advantage of reducing energy consumption.

[0139]

[0140] [Example 4]

[0141] Figure 9 illustrates a fourth embodiment of a rail piece of the present invention.

[0142] The above protrusion (120) may be composed of two first protrusions (121) that extend along both sides from one end of the main body (110) and a second protrusion (122) that extends from the center of the other end of the main body (110).

[0143] The above-mentioned receiving portion (150) is composed of a first receiving portion (151) positioned between the two first protrusions (121) and receiving the second protrusions (122), and a second receiving portion (152) positioned on both sides of the second protrusions (122) and receiving the two first protrusions (121).

[0144] At this time, a connecting portion (130) having a diameter larger than that of the second protrusion (122) and smaller than that of the main body (110) is integrally formed at the end of the second protrusion (122).

[0145] The above-mentioned connecting portion (130) may have any shape, including a circle or polygon, as long as the above-mentioned conditions are satisfied.

[0146] In the first receiving portion (151), a receiving groove (1512) that is connected to the connecting portion (130) is formed to match the shape of the connecting portion (130).

[0147] Unlike the rail pieces (105) of other embodiments, the rail piece (105) of this embodiment cannot be assembled in the longitudinal direction of the skid rail (100).

[0148] As can be seen in Fig. 9, since the diameter of the connecting portion (130) cannot pass between the first protrusion (121) and the second protrusion (122), it must be fastened by pressing up and down, unlike other embodiments.

[0149] Accordingly, in this embodiment, the outer edges of the upper and lower surfaces of the rail piece (105) are formed with a first coupling inducing portion (1311) and a second coupling inducing portion (1511) each having a constant curvature, so that the compression coupling process can be easily performed.

[0150] In the present embodiment, the rail piece (105) cannot be physically disassembled in the longitudinal direction of the main body (110) in which the plate (300) moves, so the possibility of a discontinuity occurring at the joint can be further reduced compared to the skid rail (100) of the other embodiment described above.

[0151]

[0152] [Example 5]

[0153] Figure 10 illustrates a fifth embodiment of a rail piece of the present invention.

[0154] The above protrusion (120) may be composed of a first protrusion (121) extending along the upper surface of one end of the main body (110) and a second protrusion (122) extending along the lower surface of the other end of the main body (110).

[0155] At this time, a first connecting portion (131) having a 'ㄱ' shaped cross-section is formed at the end of the first protrusion (121), and a second connecting portion (132) having a 'ㄴ' shaped cross-section is formed at the end of the second protrusion (122).

[0156] The above-mentioned receiving portion (150) is composed of a first receiving portion (151) positioned between the first connecting portion (131) and the first protrusion (121) and receiving the second connecting portion (132), and a second receiving portion (152) positioned between the second connecting portion (132) and the second protrusion (122) and receiving the first connecting portion (131).

[0157] The user can easily construct a skid rail (100) of the desired length simply by covering and connecting the first connecting portion (131) to the second receiving portion (152) of the rail piece (105) of the present embodiment without considering left and right.

[0158] An inclined surface (1312) having a predetermined angle may be formed on one side of the first connecting portion (131) and the second connecting portion (132).

[0159] The above-mentioned slope (1312) serves to enable the connecting portion to be easily guided to the receiving portion when the user wishes to connect the rail piece (105).

[0160] In addition, the above-mentioned slope (1312) can distribute the impact force transmitted in the longitudinal direction of the installed skid rail (100) to a wide transmission area, thereby preventing damage to each rail piece (105).

[0161] Of course, a heat receiving portion (180) through which a plurality of heat wires (700) pass for heating the anode material may be formed at the bottom of the rail piece (105) of the present embodiment.

[0162] In addition, for a more solid connection between rail pieces (105), a fixing groove (520) is formed through each of the first connecting portion (131) and the second receiving portion (152) that receives it, and the second connecting portion (132) and the first receiving portion (151) that receives it, and a fixing pin (510) can be inserted into the fixing groove (520).

[0163] Figure 11 shows that the rail pieces (105) of the third to fifth embodiments of the present invention are mutually combined to form a skid rail (100).

[0164] Since the above skid rail (100) is installed directly on the lower floor of the kiln (800) without using a support (200), the heating wire (700) can be placed through the heating wire receiving portion (180) formed at the bottom of the skid rail (100).

[0165] Figure 12 also shows a modified example in which the rail pieces (105) of the third to fifth embodiments of the present invention are mutually combined to form a skid rail (100).

[0166] In the above modified embodiment, the heat receiving portion (180) is installed through the lower part of the rail piece (105).

[0167] Figure 13 shows that the skid rail (100) of the third to fifth embodiments of the present invention is installed inside the kiln (800).

[0168] In the above modified embodiment, the heating element receiving portion (180) is installed through the lower part of the rail piece (105), and the heating wire (700) is inserted and installed in the heating element receiving portion (180).

[0169] In the above embodiment, the heating wire (700) is installed closer to the plate (300), so it has the advantage of reducing the energy cost required for the sintering process for heating the cathode material.

[0170]

[0171] [Example 6]

[0172] Fig. 14 illustrates a sixth embodiment of a rail piece of the present invention.

[0173] In this embodiment, the rail piece (105) may be the same as the rail piece (105) shown in FIG. 2.

[0174] As described above, the phenomenon in which the plate (300) of the existing skid rail (100) is overturned inside the kiln (800) is because the rail pieces (105) are arranged in a zigzag pattern, causing a disconnection point.

[0175] Accordingly, the rail piece (105) composed of the main body (110), the protrusions (120) formed to extend from each of the upper ends of the main body (110), and the support receiving portion (170) at the lower end of the protrusions (120) can be connected to each other in a straight line in the longitudinal direction of the main body (110) so that no discontinuity occurs in the skid rail (100).

[0176] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention were not explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. In the transport system for transporting the cathode material raw material in the secondary battery cathode material sintering process, A sintering furnace (800) for heating the above cathode material raw material; Skid rail (100) installed at the bottom of the above-mentioned kiln (800); It is configured to include a plate (300) that moves along the above skid rail (100) and on which a refractory case (400) containing the above cathode material is placed; The above skid rail (100) is configured by interconnecting a plurality of rail pieces (105), and each rail piece (105) includes a main body (110), a protrusion (120) formed to extend at least one side of both ends of the main body (110), and a receiving portion (150) formed at least one side of both ends of the main body (110) to receive the protrusion (120).

2. In claim 1, A cathode material transport system characterized in that a support (200) is interposed at the bottom of the joint surface between the protrusion (120) of one rail piece (105) and the receiving portion (150) of another rail piece (105) that faces and engages with it.

3. In claim 1, A cathode material transport system characterized in that a connecting portion (130) is formed integrally at the end of the protrusion (120) by gradually reducing the cross-section of the protrusion (120).

4. In claim 3, A cathode material transport system characterized in that a receiving groove (1512) that is connected to the connecting portion (130) is formed in the receiving portion (150).

5. In claim 3, A cathode material transport system characterized in that a first coupling guide portion (1311) having a predetermined curvature is arranged on a boundary line between the protrusion (120) and the coupling portion (130) and a boundary line between the coupling portion (130) and the attachment surface (140) which is a free end of the coupling portion (130), and a second coupling guide portion (1511) having a curvature corresponding to the first coupling guide portion (1311) is formed on a coupling surface of the receiving portion (150) and the receiving groove (1512) which are coupled corresponding to each of the first coupling guide portions (1311).

6. In claim 2, The above protrusions (120) are each formed to extend along the side surface of the end of the main body (110), and the cathode material transport system is characterized in that each of the protrusions (120) is formed symmetrically in the longitudinal direction of the main body (110).

7. In claim 6, A cathode material transport system characterized in that a fixing groove (520) is formed through each of the protrusion (120) and the support (200) located at the bottom of the protrusion, and a fixing pin (510) is inserted into the fixing groove (520).

8. In claim 1, The above protrusion (120) is composed of two first protrusions (121) that extend along both sides from one end of the main body (110) and a second protrusion (122) that extends from the center of the other end of the main body (110), and the receiving portion (150) is composed of a first receiving portion (151) that is positioned between the two first protrusions (121) and receives the second protrusions (122), and a second receiving portion (152) that is positioned on both sides of the second protrusions (122) and receives the two first protrusions (121), characterized in that the cathode material transport system 9. In claim 8, A cathode material transport system characterized in that a support (200) is interposed at the bottom of the joint surface between the first protrusion (121) of one rail piece (105) and the second receiving portion (152) of another rail piece (105) that are joined to face each other.

10. In claim 9, A cathode material transport system characterized in that a fixing groove (520) is formed through each of the first protrusion (121) and the second protrusion (122) and the support (200) interposed at the bottom of the first protrusion (121) and the second protrusion (122), and a fixing pin (510) is inserted into the fixing groove (520).

11. In any one of claim 2 or claim 9, A cathode material transport system characterized in that a plurality of heating wires (700) for heating the cathode material raw material are arranged between the plurality of supports (200).

12. In claim 8, A cathode material transport system characterized in that a connecting portion (130) having a diameter larger than that of the second protrusion (122) and smaller than that of the main body (110) is integrally formed at the end of the second protrusion (122).

13. In claim 11, A cathode material transport system characterized in that a second coupling inducing part (1511) and a first coupling inducing part (1311) having a predetermined curvature are formed at the upper end of the boundary line between the first receiving part (151) and the first protrusion part (121) and at the upper end of the boundary line between the connecting part (130) and the second receiving part (152), respectively.

14. In claim 1, The above protrusion (120) is composed of a first protrusion (121) extending along the upper surface of one end of the main body (110) and a second protrusion (122) extending along the lower surface of the other end of the main body (110), and a first connecting portion (131) having an 'ㄱ' cross-section is formed at the end of the first protrusion (121), and a second connecting portion (132) having an 'ㄴ' cross-section is formed at the end of the second protrusion (122), and the receiving portion (150) is composed of a first receiving portion (151) located between the first connecting portion (131) and the first protrusion (121) and accommodating the second connecting portion (132), and a second receiving portion (152) located between the second connecting portion (132) and the second protrusion (122) and accommodating the first connecting portion (131). A cathode material transport system characterized by being configured 15. In claim 14, A cathode material transport system characterized in that an inclined surface (1312) of a predetermined angle is formed on one side of the first coupling portion (131) and the second coupling portion (132).

16. In any one of claim 1 or claim 8, A cathode material transport system characterized in that a heat receiving portion (180) is formed at the bottom of the rail piece (105) through which a plurality of heat wires (700) pass to heat the cathode material raw material.

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