Air inlet element

Abstract

The air inlet element comprises an air inlet assembly and a sealing assembly, the air inlet assembly comprises an air inlet core and an air inlet pipe, an air inlet channel is formed in the air inlet core, the air inlet core is in pouring connection with a bottom refractory lining of a graphene preparation device, one end of the air inlet pipe is connected with the air inlet core and communicates with the air inlet channel, and the other end of the air inlet pipe communicates with the sealing assembly; the other end of the air inlet pipe penetrates through a bottom plate of the graphene preparation device to be communicated with the air supply assembly, and meanwhile, the middle of the air inlet pipe is in sealed connection with the bottom plate of the graphene preparation device through a sealing assembly. The gas inlet element is installed in the bottom refractory lining, with the temperature lower than that of the molten metal, of the graphene preparation device, gas is introduced from the bottom of the graphene preparation device, and the gas inlet element does not stretch into the molten liquid metal so as to avoid cracking of carbon source gas before the carbon source gas makes contact with the molten metal; carbon deposition in the air inlet element is prevented, and the risk of blockage of the air inlet element is reduced, so that the maintenance frequency of the air inlet element is reduced, and the production efficiency of the graphene preparation device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of carbon materials, and in particular to an air intake component. Background Art

[0002] Graphene has excellent optical, electrical and mechanical properties, and has important application prospects in materials science, new energy and biomedicine. Currently, graphene has been widely used in battery electrode materials, semiconductor devices, transparent displays, sensors, capacitors and transistors.

[0003] The preparation methods of graphene include mechanical exfoliation, epitaxial growth, oxidation-reduction and chemical vapor deposition. Chemical vapor deposition (CVD) is currently the best method for producing high-quality graphene. CVD uses liquid metal as a catalyst. The bubbling acoustic field of high-temperature molten metal catalyst can realize the preparation of graphene powder. After the bubble bursts, the graphene is separated from the metal, and the molten metal catalyst can be reused to achieve continuous growth of graphene powder.

[0004] In the prior art, the air intake pipe of the air intake element of the graphene preparation device is passed from top to bottom into the bottom of the molten metal catalyst. The air intake section of the air intake pipe immersed in the molten metal catalyst is in a high temperature state. During ventilation, the carbon source gas will undergo a cracking reaction in the air intake section, causing carbon deposition on the inner wall of the air intake section of the air intake pipe, which will eventually become blocked and require maintenance, thereby reducing the production efficiency of the graphene preparation device.

[0005] Therefore, how to reduce the risk of blockage of the air intake element to improve the production efficiency of the graphene preparation device has become a technical problem that needs to be urgently solved by those skilled in the art. Utility Model Content

[0006] The present application proposes an air intake element to reduce the risk of air intake element blockage, improve the production efficiency of the graphene preparation device, and realize long-term continuous production of the graphene preparation device.

[0007] In order to achieve the above object, the present application provides an air intake component, including an air intake component and a sealing component.

[0008] The air intake assembly comprises:

[0009] An air intake core is provided with an air intake passage and is connected to the bottom refractory lining of the graphene preparation device by pouring;

[0010] An air intake pipe, the air outlet end of which is connected to the air intake core and communicated with the air intake duct, the air intake pipe is connected to the bottom plate of the graphene preparation device through the sealing component, and the air intake end of the air intake pipe is communicated with the air supply component.

[0011] Preferably, in the above-mentioned air intake element, the air intake assembly further comprises a protection seat, the protection seat is sleeved on the air intake core, and the protection seat is cast-connected to the bottom refractory lining.

[0012] Preferably, in the above-mentioned air intake element, the size of the air intake end of the air intake core is larger than the size of the air outlet end of the air intake core, and the shape of the through hole on the protective seat for connecting with the air intake core sleeve is adapted to the shape of the air intake core.

[0013] Preferably, in the above-mentioned air intake element, the outer wall of the protection seat is provided with a sealing groove.

[0014] Preferably, in the above-mentioned air intake element, the air intake assembly further comprises a protective sleeve, which is sleeved on the air intake core, and the protective seat is sleeved on the protective sleeve, and the protective sleeve is used for axially protecting the air intake core to prevent the air intake core from breaking.

[0015] Preferably, in the above-mentioned air intake element, the outer wall of the protective sleeve is provided with anchoring nails, and the protective sleeve is anchored and connected to the protective seat through the anchoring nails.

[0016] Preferably, in the above-mentioned air intake element, the air intake core is a high temperature resistant air intake core, and / or, the high temperature resistant protective seat is a high temperature resistant protective seat, and / or, the protective cover is a metal cover.

[0017] Preferably, in the above-mentioned air intake element, a transition cavity is provided at the air intake end of the air intake core, the transition cavity is communicated with the air intake passage, and the cross-sectional area of ​​the transition cavity along the direction perpendicular to the axis of the air intake core is larger than the cross-sectional area of ​​the air intake pipe along the direction perpendicular to the axis of the air intake core;

[0018] It also includes a sealing plate, which is arranged at the air intake end of the air intake core and is used to seal the transition cavity. The sealing plate is provided with a through hole, and the air intake pipe is connected to the sealing plate and communicates with the transition cavity through the through hole.

[0019] Preferably, in the above-mentioned air intake element, the air intake core is provided with a plurality of air intake passages, and the flow area of ​​the air intake passages is smaller than the flow area of ​​the air intake pipe;

[0020] The cross-sectional shape of the air intake passage along the axial direction of the air intake core is circular, linear, S-shaped or arc-shaped, and the cross-sectional shapes of the plurality of air intake passages are the same or different.

[0021] Preferably, in the above-mentioned air intake element, the sealing assembly comprises a first sealing gasket, a sealing tube, a second sealing gasket and a sealing ring.

[0022] The sealing tube is sleeved on the intake pipe, the first sealing gasket is arranged between the upper end of the sealing tube and the intake core, the second sealing gasket is arranged between the lower end of the sealing tube and the sealing ring, and the sealing ring is threadedly connected to the intake pipe for compressing the second sealing gasket.

[0023] The air intake element provided in the embodiment of the present application includes an air intake assembly and a sealing assembly. The air intake assembly includes an air intake core and an air intake pipe. An air intake passage is provided in the air intake core. The air intake core is cast and connected to the bottom refractory lining of the graphene preparation device. One end of the air intake pipe is connected to the air intake core and communicated with the air intake passage. The other end of the air intake pipe passes through the bottom plate of the graphene preparation device and communicates with the air supply assembly. At the same time, the middle part of the air intake pipe is sealed and connected to the bottom plate of the graphene preparation device through the sealing assembly. The present application installs the air intake element in the bottom refractory lining of the graphene preparation device whose temperature is lower than that of the molten metal, and realizes the introduction of gas from the bottom of the graphene preparation device. The air intake element does not extend into the molten liquid metal to avoid the carbon source gas from cracking before contacting the molten metal, to prevent carbon accumulation inside the air intake element, and to reduce the risk of clogging of the air intake element, thereby reducing the number of maintenance times of the air intake element and improving the production efficiency of the graphene preparation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the present application can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0025] Figure 1 It is a schematic diagram of the structure of the air intake component of the present application;

[0026] Figure 2 is a top view of the air intake element of the present application;

[0027] Figure 3 It is a structural schematic diagram of the air intake assembly (without the protective seat) of the air intake element of the present application;

[0028] Figure 4 It is a schematic structural diagram of the protective seat of the air intake element of the present application;

[0029] Figure 5 It is a schematic diagram of the structure of the connection between the protection seat and the anchor nail of the present application;

[0030] Figure 6This is a top view of the first embodiment of the present application when the protective seat is cylindrical;

[0031] Figure 7 This is a top view of the second embodiment of the present application when the protective seat is in a cubic shape.

[0032] Figure 8 is a schematic structural diagram of a sealing assembly of an air intake element of the present application;

[0033] Fig. 9 It is a schematic structural diagram of the air intake duct of the first embodiment of the present application;

[0034] Fig.10 is a schematic structural diagram of the air intake duct of the second embodiment of the present application;

[0035] Fig.11 is a schematic structural diagram of an air intake duct according to a third embodiment of the present application;

[0036] Fig.12 is a schematic structural diagram of an air intake duct according to a fourth embodiment of the present application;

[0037] Fig.13 is a schematic structural diagram of an air intake duct according to a fifth embodiment of the present application;

[0038] Fig.14 is a structural schematic diagram of an air intake duct according to a sixth embodiment of the present application;

[0039] The accompanying drawings are as follows:

[0040] 1-intake assembly; 11-intake core; 111-transition chamber; 12-intake pipe; 13-protection seat; 131-sealing groove; 14-protection cover; 141-anchor nail; 15-sealing plate;

[0041] 2-sealing assembly; 21-sealing tube; 22-first sealing gasket; 23-second sealing gasket; 24-sealing ring. DETAILED DESCRIPTION

[0042] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are only used to explain the related application, rather than to limit the application. The described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0043] It should be noted that, for ease of description, only the parts related to the relevant applications are shown in the accompanying drawings. In the absence of conflict, the embodiments in this application and the features in the embodiments can be arbitrarily combined with each other, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features.

[0044] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0045] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0047] See also Figure 1-Figure 14 .

[0048] Some embodiments of the present application disclose an air intake component, including an air intake component 1 and a sealing component 2 .

[0049] Among them, the air intake component 1 includes an air intake core 11 and an air intake pipe 12, an air intake duct is opened in the air intake core 11, the air intake component 1 is cast connected to the bottom refractory lining of the graphene preparation device (the air intake core 11 can be cast connected to the bottom refractory lining, or the air intake core 11 and the air intake pipe 12 can be cast connected to the bottom refractory lining), one end of the air intake pipe 12 is connected to the air intake core 11 and communicated with the air intake duct, the other end of the air intake pipe 12 passes through the bottom plate of the graphene preparation device and is communicated with the air supply component, and at the same time, the air intake pipe 12 is sealed and connected to the bottom plate of the graphene preparation device through the sealing component 2 to prevent leakage.

[0050] During operation, the gas first enters the air intake pipe 12, then enters the air intake passage of the air intake core 11 through the air intake pipe 12, and finally enters the graphene preparation device through the air intake passage. When the gas is a carbon source gas, the carbon source gas generates graphene under the action of the molten metal of the graphene preparation device. The carbon source gas can be a mixture of one or more of methane, ethane, ethylene, acetylene, carbon monoxide, carbon dioxide, ethanol, propylene, propane, butane, butadiene, pentane, pentene, benzene or toluene; at least one of ammonia and borane can also be selectively added.

[0051] The molten liquid metal catalyst may be one or more of iron, cobalt, nickel, copper, chromium, gold, silver, platinum, zinc, aluminum, chromium, manganese, titanium, tin, magnesium, gallium, indium or palladium.

[0052] The gas supplied by the gas supply device is not limited to the carbon source gas, and other gases, such as inert gas, may be introduced according to production needs.

[0053] The temperature of the bottom refractory lining is lower than the temperature of the molten metal in the graphene preparation device. The present application installs the air intake element in the bottom refractory lining of the graphene preparation device. Compared with the method of inserting the air intake element into the molten metal in the prior art, it can reduce the damage of high temperature to the air intake element and extend the service life of the air intake element.

[0054] The air intake element 1 is arranged at the bottom of the graphene preparation device, which changes the air intake direction. The gas is introduced from the bottom of the graphene preparation device, and the gas moves from the bottom of the molten metal to the top of the molten metal. Compared with the method of inserting the air intake element into the molten metal in the prior art, the movement path of the gas in the graphene preparation device is extended, which not only increases the contact area between the gas and the molten metal, but also extends the residence time of the gas in the graphene preparation device, thereby improving the quality of the graphene. Moreover, the air intake element 1 does not extend into the molten liquid metal, thereby avoiding the carbon source gas from being cracked in the air intake duct of the air intake element 1 before contacting the molten metal, preventing carbon deposition in the air intake element 1, and reducing the risk of blockage of the air intake element 1, thereby reducing the number of maintenance times of the air intake element, improving the production efficiency of the graphene preparation device, and realizing long-term continuous production of the graphene preparation device.

[0055] The air intake element and the bottom refractory lining are cast in one piece, which not only ensures the connection strength between the air intake element and the bottom refractory lining, but also the bottom refractory lining can protect the air intake element, improves the thermal shock resistance of the air intake core 11, and further extends the service life of the air intake core 11; at the same time, the one-piece casting connection method also ensures the sealing between the air intake core 11 and the bottom refractory lining, preventing molten metal from leaking from the gap between the air intake core 11 and the bottom refractory lining.

[0056] The present application controls the growth of graphene by controlling the speed and pressure of gas entering the graphene preparation device from the air inlet element 1, so as to achieve the purpose of producing graphene of different qualities according to the application direction of carbon materials through regulation.

[0057] The carbon source gas is supplied to the air intake core 11 of the air intake assembly 1 from bottom to top, and the air intake passage of the air intake core 11 is occupied by the gas to prevent the molten metal from overflowing from the graphene preparation device from the air intake core 11 or blocking the air intake passage.

[0058] The end of the air inlet core 11 connected to the air inlet pipe 12 is the air inlet end, and the end of the air inlet core 11 not connected to the air inlet pipe 12 is the air outlet end. In this solution, the air outlet end of the air inlet core 11 can be flush with the surface of the bottom refractory lining, or can be higher than the surface of the bottom refractory lining, or can be lower than the surface of the bottom refractory lining. Preferably, the air outlet end of the air inlet core 11 is flush with the surface of the bottom refractory lining or lower than the surface of the bottom refractory lining to reduce the contact area between the molten metal and the air inlet element, and reduce the damage to the air inlet element caused by high temperature.

[0059] The air intake core 11 is made of refractory material, and the selected refractory material is corundum, graphite, silicon carbide or metal tungsten, etc., which further prolongs the service life of the air intake core 11.

[0060] The air intake assembly 1 of the air intake element disclosed in the present application also includes a protective seat 13, which is sleeved outside the air intake core 11 and is used to protect the air intake core 11, improve the overall strength of the air intake assembly 1, and extend the service life of the air intake assembly 1, thereby extending the service life of the air intake element.

[0061] Preferably, the protection seat 13 is made of a refractory material such as corundum, graphite, silicon carbide or metal tungsten, which further prolongs the service life of the protection seat 13 .

[0062] The air intake core 11 and the protection seat 13 may be made of the same material or different materials. The specific selection is made by those skilled in the art according to actual needs.

[0063] The cross section of the protection seat 13 along its own axis direction can be circular, polygonal, or even a special-shaped structure. The specific shape is selected by those skilled in the art according to actual needs.

[0064] The cross section of the air intake core 11 along its own axis direction may be circular, polygonal, or even a special-shaped structure. The specific shape is selected by those skilled in the art according to actual needs.

[0065] The air intake core 11 and the protection seat 13 may be coaxially arranged or non-coaxially arranged, and the shapes of the air intake core 11 and the protection seat 13 may be the same or different. Specifically, when the air intake core 11 is a truncated cone structure, the protection seat 13 may be cylindrical or cubic.

[0066] The length of the air intake core 11 along its own axial direction does not exceed the length of the protection seat 13 along the axial direction of the air intake core 11 , so that the protection seat 13 can fully play the role of protecting the air intake core 11 .

[0067] Only one air intake core 11 may be disposed on a single protective seat 13, or multiple air intake cores 11 may be disposed. In the embodiment where multiple air intake cores 11 are disposed on a single protective seat 13, the air intake cores 11 correspond to the air intake pipes 12 one by one.

[0068] The air intake element disclosed in the present solution has a small circumferential dimension and a small volume of a single air intake element, which reduces the processing cost of the air intake assembly to a certain extent.

[0069] The circumferential dimensions of the multiple air inlet elements provided on the bottom refractory lining of the graphene preparation device may be equal or unequal. In the embodiment where the circumferential dimensions of the multiple air inlet elements are unequal, the sum of the air inlet areas of the air inlet ducts provided on the air inlet cores of the air inlet elements with larger circumferential dimensions is greater than the sum of the air inlet areas of the air inlet ducts provided on the air inlet cores of the air inlet elements with smaller circumferential dimensions, and air inlet elements with multiple air inlet areas are provided. Those skilled in the art may select air inlet elements with different air inlet areas according to requirements to improve the flexibility of arranging the air inlet elements on the bottom refractory lining. The apertures of the air inlet ducts on the air inlet elements with different circumferential dimensions may be equal or unequal.

[0070] The present application can adjust the flow rate and flow of the gas by the aperture of the air intake passage of the air intake core, and those skilled in the art can select an air intake core with a corresponding aperture according to production requirements.

[0071] The apertures of the multiple air inlet passages on a single air inlet core may be equal or unequal.

[0072] The circumferential dimension of the air intake element disclosed in the present application is small, and accordingly, the dimension of the air intake passage arranged on the air intake element is also relatively small, which can reduce the difficulty of controlling the air pressure in the air intake passage and reduce the risk of the air intake passage being blocked by molten metal.

[0073] At the same time, the smaller size of the air inlet duct can also reduce the requirements of the air inlet duct on the air flow rate to a certain extent, especially reducing the minimum flow rate of the air inlet duct. The minimum flow rate is the flow rate in the air inlet duct that prevents molten metal from entering the air inlet duct, further increasing the scope of application of the graphene preparation device.

[0074] The multiple air inlet components are independent of each other on the bottom refractory lining, and the air inlet or closing of the multiple air inlet components can be controlled separately to improve the flexibility of the graphene preparation device, and the work of two adjacent air inlet components will not interfere with each other. Specifically, during the operation of the graphene preparation device, the staff can cut off the air supply of the air inlet component at the designated position as needed, and different air inlet components can be supplied with different gases, and the same air inlet component can be connected to different gas sources.

[0075] Those skilled in the art can design the location, density and number of the air inlet elements on the bottom refractory lining according to actual needs to meet the gas supply requirements at different locations, thereby meeting the different production requirements of the graphene preparation device. In the process of the gas passing through the air inlet core 11 into the graphene preparation device, the gas will apply a thrust to the air inlet core 11, and the thrust is directed toward the outlet end of the air inlet core 11.

[0076] In order to prevent the air intake core 11 from moving toward the air outlet end of the air intake core 11, the size of the air intake end of the air intake core 11 in this solution is larger than the size of the air outlet end of the air intake core 11. Accordingly, the through hole of the protective seat 13 used for sleeve connection with the air intake core 11 is also larger in size near the air intake end of the air intake core 11 than in size near the air outlet end of the air intake core 11. Figure 1 As shown, the protection seat 13 limits the air intake core 11 through the through hole to prevent the air intake core 11 from moving toward the air outlet end of the air intake core 11.

[0077] In some embodiments of the present application, the air intake core 11 is in a truncated cone shape, or the side wall of the air intake core 11 is in a step shape.

[0078] In order to further optimize the above technical solution, the air intake assembly 1 disclosed in the present application also includes a protective cover 14, which is mounted on the air intake core 11, and the protective seat 13 is mounted on the protective cover 14. The protective cover 14 is used to protect the air intake core 11 in the axial direction. It can withstand external stress during operation to prevent the air intake core 11 from axial fracture, thereby extending the service life of the air intake component.

[0079] The protective cover 14 can also protect the air intake core 11 in the circumferential direction to prevent the air intake core 11 from cracking in the circumferential direction.

[0080] Preferably, the shape of the protective cover 14 is the same as the shape of the outer wall of the air intake core 11 .

[0081] The protective cover 14 is made of metal material, such as carbon steel, low alloy steel or stainless steel, etc. The melting point of the protective cover 14 is greater than the melting point of the molten metal. The protective cover 14 can completely wrap the outside of the intake core 11, or only wrap the axial part of the intake core 11.

[0082] The present application protects the air intake core 11 by means of the protective cover 14 and the protective seat 13 at the same time. The combination of the three not only ensures the heat resistance of the air intake component 1, but also ensures the strength requirement of the air intake component 1.

[0083] In some embodiments of the present application, an outer wall of the protective cover 14 is provided with anchoring nails 141 , and the protective cover 14 is anchored and connected to the protective seat 13 through the anchoring nails 141 to improve the integrity of the air intake assembly 1 .

[0084] In order to further optimize the above technical scheme, in this scheme, the outer wall of the protection seat 13 is provided with a labyrinth sealing groove to enhance the sealing between the protection seat 13 and the bottom refractory lining, so as to prevent the molten metal in the graphene preparation device from leaking from the gap between the protection seat 13 and the bottom sealing lining; at the same time, the setting of the labyrinth sealing groove also enhances the connection strength between the protection seat 13 and the bottom refractory lining.

[0085] like Figure 1 and Figure 3 As shown, a transition cavity 111 is provided at the air intake end of the air intake core 11 , and the transition cavity 111 is connected to the air intake duct. The cross-sectional area of ​​the transition cavity 111 along the direction perpendicular to the axis of the air intake core 11 is larger than the cross-sectional area of ​​the air intake pipe 12 along the direction perpendicular to the axis of the air intake core 11 .

[0086] The air inlet end of the air inlet core 11 is also provided with a sealing plate 15, which is used to seal the end of the transition chamber 111 away from the air inlet duct. The sealing plate 15 is provided with a through hole, and the air inlet pipe 12 is installed on the sealing edge and the air inlet pipe 12 is connected to the transition chamber 111 through the through hole.

[0087] The side of the sealing plate 15 that cooperates with the sealing assembly 2 needs to be machined so that the roughness of the sealing plate 15 meets the sealing requirements.

[0088] Before entering the air intake passage, the gas in the air intake pipe 12 first enters the transition chamber 111, and then enters the air intake passage after being dispersed in the transition chamber 111. This structural form realizes the connection between the air intake pipe 12 and the air intake core 11 with a larger setting area, reduces the difficulty of matching the air intake pipe 12 and the air intake core 11, and at the same time forms an air flow buffer in the transition chamber 111, ensuring that the air intake passage of the air intake core 11 is evenly filled with gas, preventing liquid metal from overflowing from the air intake passage.

[0089] In some embodiments of the present application, the protective cover 14, the sealing plate 15 and the air intake pipe 12 are connected as a whole, and after the air intake core 11 is connected with the protective cover 14, the sealing plate 15 and the air intake pipe 12 of the integrated structure, the protective seat 13 is then sleeved on the protective cover 14. The protective cover 14, the sealing plate 15 and the air intake pipe 12 are an integrated structure, which can better ensure the sealing performance of the air intake assembly 1 and reduce the requirements for the sealing assembly 2.

[0090] In some embodiments of the present application, the air intake core 11 is provided with a plurality of air intake passages, and the flow area of ​​a single air intake passage is smaller than the flow area of ​​the air intake pipe 12. Preferably, the plurality of air intake passages are evenly distributed on the cross section of the air intake core 11.

[0091] A plurality of evenly distributed air inlets cooperate with the transition chamber 111, and the air is redistributed through the transition chamber 111, so that the gas can be evenly distributed in each air inlet, ensuring that each air inlet is filled with gas, increasing the contact area between the gas and the molten metal, and improving the quality and production efficiency of graphene.

[0092] Preferably, the cross-sectional area of ​​the transition cavity 111 along the axis perpendicular to the air intake core 11 is equal to the cross-sectional area of ​​the air outlet end of the air intake core 11, so that the channel area of ​​the air intake duct from the transition cavity 111 to the air outlet end of the air intake core 11 is equal.

[0093] The gas passes through the intake pipe 12, the transition chamber 111 and the intake duct in sequence, so that the gas enters from a small space into a large space and then into a small space. The air flow speed decelerates and then accelerates, so that the gas quickly enters the graphene preparation device, which can disturb the molten metal in the graphene preparation device, increase the contact area between the gas and the molten metal, and improve the quality of the graphene.

[0094] There are many shapes of the air intake duct. The cross-section of the air intake duct along the direction perpendicular to the axis of the air intake core 11 is circular, straight, arc-shaped or S-shaped, etc. The distribution of the air intake duct along the cross-section perpendicular to the axis of the air intake core 11 is radially distributed along the air intake core 11 and / or circumferentially distributed along the air intake core 11.

[0095] In some embodiments of the present application, Figure 9-14 As shown, the air intake passage is distributed radially in a cross section perpendicular to the axial direction of the air intake core 11, and the cross-sectional shape of the air intake passage is at least one of a circular shape, a linear shape, an arc shape or an S shape.

[0096] In some embodiments of the present application, the air intake duct is distributed circumferentially in a cross section perpendicular to the axial direction of the air intake core 11 , and the cross-sectional shape of the air intake duct is at least one of circular, linear, arc-shaped or S-shaped.

[0097] The air inlet channel on the air inlet core 11 can change the flow direction of the gas so that the gas enters the graphene preparation device in different forms.

[0098] like Fig. 9As shown, the cross-sectional shape of the air inlet duct along the direction perpendicular to the axis of the air inlet core 11 is a straight line, and the air inlet duct is radially arranged around the axis of the air inlet core 11, and the gas discharged from the air inlet core 11 is also ejected linearly radially around the axis of the air inlet core 11, and the gas discharged from a single air inlet duct is in a planar shape, and there is a fan-shaped angle between the gases discharged from two adjacent air inlets, so that the planar gas can contact and react with the molten metal on both sides at the same time;

[0099] like Fig.10 As shown, the cross-sectional shape of the air inlet along the direction perpendicular to the axis of the air inlet core 11 is arc-shaped, and multiple arc-shaped air inlets are arranged along the radial direction of the air inlet core 11, and multiple rows of arc-shaped air inlets are arranged radially around the axis of the air inlet core 11. This arrangement increases the number of air inlets, thereby increasing the air inlet area, forming multiple annular air flows, and there are disturbances between the multiple annular air flows, which promotes the movement of the molten metal and further increases the contact area between the molten metal and the air flow, and / or also includes a straight air inlet that runs through each row of multiple arc-shaped air inlets, and the straight air inlet can also form an air flow between adjacent arc-shaped air inlets, further increasing the air inlet area and optimizing the reaction effect;

[0100] like Fig.11 As shown, the cross-sectional shape of the air intake duct along the direction perpendicular to the axis of the air intake core 11 is S-shaped, at least one S-shaped air intake duct is arranged along the radial direction of the air intake core 11, and multiple S-shaped air intake ducts are arranged radially around the axis of the air intake core 11. The airflow discharged from a single air intake duct is S-shaped, so that airflow exists in the circumferential direction and axial direction of the air intake core 11 at the same time. Under the premise that the distribution length of a single air intake duct in the radial direction remains unchanged, the circumferential area of ​​a single air intake duct is increased;

[0101] like Fig.12 As shown, the cross-sectional shape of the air inlet along the direction perpendicular to the axis of the air inlet core 11 is circular, and the circular air inlet is evenly or unevenly distributed on the cross-section of the air inlet core 11, that is, the air inlet is in the shape of a circular hole, forming a plurality of columnar airflows to increase the contact area with the molten metal, improve the disturbance to the molten metal, and optimize the reaction effect. In addition, the opening of the circular hole is relatively simple, low in cost, and has a good effect.

[0102] like Fig.13 As shown, the air intake core 11 has two cross-sectional shapes of air intake passages, namely circular and linear. The linear air intake passage is radially arranged around the axis of the air intake core 11, and the circular air intake passage is opened between two adjacent linear air intake passages, integrating the advantages of both the linear air intake passage and the circular air intake passage, so that the air intake is more uniform and the reflection effect is better.

[0103] like Fig.14As shown, the air intake core 11 has air intake passages with two cross-sectional shapes, namely circular and S-shaped. The S-shaped air intake passage is radially arranged around the axis of the air intake core 11, and the circular air intake passage is opened between two adjacent straight air intake passages. This form further enhances the uniformity of gas entering the graphene preparation device and optimizes the reaction effect.

[0104] The above different forms of air inlets will have different effects on the flow pattern, residence time and reaction contact area of ​​the carbon source gas in the molten metal. Through the combination of one or more forms, graphene of different qualities can be produced, and the application prospects are more extensive.

[0105] In the embodiment where the air intake core 11 has air intake passages with two or more cross-sectional shapes, the combination of the air intake passages is not limited to the above embodiment, and may also be other combination forms.

[0106] In the embodiment where the cross section of the air intake duct is circular, the air intake duct is not limited to a perfect circle, but may also be an ellipse, a teardrop, a long strip, a fan, or the like.

[0107] The cross section of the air intake duct is not limited to the above-mentioned forms, and may also be polygonal, T-shaped, L-shaped, M-shaped or other shapes.

[0108] The total porosity of the air intake core 11 is adjusted according to actual needs to meet the reaction requirements and ensure a high air permeability of the air intake core 11 .

[0109] In some embodiments of the present application, the sealing assembly 2 includes a first sealing gasket 22, a sealing tube 21, a second sealing gasket 23 and a sealing ring 24. The sealing tube 21 is sleeved on the intake pipe 12. The first sealing gasket 22 is arranged between the upper end of the sealing tube 21 and the intake core 11. The second sealing gasket 23 is arranged between the lower end of the sealing tube 21 and the sealing ring 24. The sealing ring 24 is connected to the intake pipe 12 by threads for compressing the second sealing gasket 23.

[0110] The sealing component 2 is used to ensure that the combustible gas in the graphene preparation device does not enter the gap between the air intake pipe and the sealing component 2 from the gap between the air intake component 1 and the bottom refractory lining, thereby improving the safety of the graphene preparation device.

[0111] A mounting hole for mounting the sealing assembly 2 is provided on the bottom plate of the graphene preparation device, and the sealing tube 21 is welded to the bottom plate. The sealing tube 21 can also guide the installation of the intake pipe 12 .

[0112] The first sealing gasket 22 and the second sealing gasket 23 cooperate to form a double-layer sealing structure to improve the sealing effect of the sealing assembly 2; and the sealing ability of the second sealing gasket 23 can be adjusted. Specifically, the sealing ring 24 is rotated to adjust the clamping force applied by the sealing ring 24 to the second sealing gasket 23, thereby adjusting the sealing ability of the second sealing gasket 23.

[0113] Specifically, an embedding groove for embedding the second sealing gasket 23 is opened at the lower end of the sealing tube 21 , and the sealing ring 24 presses the second sealing gasket 23 into the embedding groove to improve the sealing effect of the second sealing gasket 23 .

[0114] The air intake assembly 1 of the air intake element disclosed in the present application is prefabricated as a whole in a professional factory, which can ensure its overall sealing. When the air intake assembly 1 is assembled with the graphene preparation device, the sealing tube 21 is first welded to the bottom plate of the graphene preparation device, and then the first sealing gasket 22 is placed on the upper end surface of the sealing tube 21, and then the air intake pipe 12 of the air intake assembly 1 is passed through the sealing tube 21, and then the second sealing gasket 23 is pressed against the lower end of the sealing tube 21 through the sealing ring 24, and finally, the bottom refractory lining is cast to realize that the air intake element and the bottom refractory lining form a whole.

[0115] The air intake element is integrally cast and connected with the bottom refractory lining. The bottom refractory lining of the graphene preparation device fixes and protects the air intake component 1, thereby improving the overall thermal shock resistance of the air intake element to a certain extent and extending the service life of the air intake element.

[0116] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used, and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. The scope of application involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned application concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in this application (but not limited to) to form a technical solution.

Claims

1. An air intake element, characterized in that: It comprises an air intake assembly (1) and a sealing assembly (2), The air intake assembly (1) comprises: An air intake core (11) is provided with an air intake passage and is connected to the bottom refractory lining of the graphene preparation device by pouring; An air intake pipe (12), the air outlet end of the air intake pipe (12) being connected to the air intake core (11) and communicating with the air intake duct, the air intake pipe (12) being connected to the bottom plate of the graphene preparation device via the sealing component (2), and the air intake end of the air intake pipe (12) communicating with the air supply component.

2. The air intake element according to claim 1, characterized in that The air intake assembly (1) further comprises a protection seat (13), wherein the protection seat (13) is sleeved on the air intake core (11), and the protection seat (13) is connected to the bottom refractory lining by casting.

3. The air intake element according to claim 2, characterized in that The size of the air inlet end of the air inlet core (11) is larger than the size of the air outlet end of the air inlet core (11), and the shape of the through hole on the protective seat (13) for sleeve connection with the air inlet core (11) is adapted to the shape of the air inlet core (11).

4. The air intake element according to claim 2, characterized in that: The outer wall of the protection seat (13) is provided with a sealing groove (131).

5. The air intake element according to claim 2, characterized in that: The air intake assembly (1) further comprises a protective sleeve (14) which is sleeved on the air intake core (11); the protective seat (13) is sleeved on the protective sleeve (14); the protective sleeve (14) is used to axially protect the air intake core (11) to prevent the air intake core (11) from breaking.

6. The air intake element according to claim 5, characterized in that An anchoring nail (141) is provided on the outer wall of the protective sleeve (14), and the protective sleeve (14) is anchored and connected to the protective seat (13) via the anchoring nail (141).

7. The air intake element according to claim 5, characterized in that The air intake core (11) is a high temperature resistant air intake core, and / or the protection seat (13) is a high temperature resistant protection seat, and / or the protection sleeve (14) is a metal sleeve.

8. The air intake element according to claim 1, characterized in that The air intake end of the air intake core (11) is provided with a transition cavity (111), the transition cavity (111) is communicated with the air intake passage, and the cross-sectional area of ​​the transition cavity (111) along a direction perpendicular to the axis of the air intake core (11) is larger than the cross-sectional area of ​​the air intake pipe (12) along a direction perpendicular to the axis of the air intake core (11); It also includes a sealing plate (15) which is arranged at the air intake end of the air intake core (11) and is used to seal the transition cavity (111); a through hole is provided on the sealing plate (15); the air intake pipe (12) is connected to the sealing plate (15) and communicates with the transition cavity (111) through the through hole.

9. The air intake element according to claim 1, characterized in that: The air intake core (11) is provided with a plurality of air intake passages, and the flow area of ​​the air intake passages is smaller than the flow area of ​​the air intake pipe (12); The cross-sectional shape of the air intake passage along the axial direction of the air intake core (11) is circular, linear, S-shaped or arc-shaped, and the cross-sectional shapes of the plurality of air intake passages are the same or different.

10. The air intake element according to claim 1, characterized in that The sealing assembly (2) comprises a first sealing gasket (22), a sealing tube (21), a second sealing gasket (23) and a sealing ring (24). The sealing tube (21) is sleeved on the intake pipe (12); the first sealing gasket (22) is arranged between the upper end of the sealing tube (21) and the intake core (11); the second sealing gasket (23) is arranged between the lower end of the sealing tube (21) and the sealing ring (24); the sealing ring (24) is threadedly connected to the intake pipe (12) for tightening the second sealing gasket (23).

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