Graphite cylinder for high-temperature furnace
By designing multi-layer through holes and limiting structures on the side wall of the graphite cylinder, the problem of uneven airflow penetration was solved, achieving uniformity of material purity and convenient operation, thus improving the processing effect of the high-temperature furnace.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2026-03-10
AI Technical Summary
The existing graphite cylinders have poor vertical airflow uniformity in high-temperature furnaces, resulting in uneven material purity.
Multiple through holes are opened on the side wall of the graphite cylinder along the extension direction. The hole diameter gradually decreases from the bottom to the top, and a limiting structure design is used to maintain the gap in the lateral direction. Combined with auxiliary transport holes, the through hole design ensures uniform airflow penetration.
It improves the uniformity of airflow penetration in the vertical direction, enhances the uniformity of material purity, and facilitates operation and handling through auxiliary holes.
Smart Images
Figure CN223985570U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to graphite cylinder equipment technical field especially relates to a graphite cylinder for high temperature furnace. BACKGROUND
[0002] High temperature furnace is mainly used in industrial and mining enterprises, scientific research units laboratory, laboratory heating, heat treatment, is indispensable instrument and equipment of all kinds of laboratory and industrial and mining enterprises, and in the treatment process of graphite material, graphite cylinder is often used for protection when purifying materials in high temperature furnace.
[0003] In the prior art, the side wall of the graphite cylinder is often treated with holes to adjust the airflow in the furnace, improve the uniformity of the gas distribution inside and outside the graphite cylinder, and thus improve the purity of the material. However, whether in the vertical direction of the graphite cylinder or in the horizontal direction of the graphite cylinder, the diameter of the holes in the side wall is generally equal. When the graphite cylinder has a large air inlet flow rate at the bottom, the vertical permeability of the airflow is poor, which can easily cause poor uniformity of the purity of the material in the cylinder. SUMMARY
[0004] The graphite cylinder for high temperature furnace provided by the embodiments of the present application can improve the vertical permeability of the airflow when the graphite cylinder has a large air inlet flow rate at the bottom, ensure uniform gas distribution, and thus improve the uniformity of the purity of the material.
[0005] The graphite cylinder for high temperature furnace provided by the embodiments of the present application includes a cylinder cover and a cylinder body, wherein the top of the cylinder body is provided with a first limiting structure in the circumferential direction, the bottom of the cylinder cover is provided with a second limiting structure matched with the first limiting structure, and a gap is maintained between the second limiting structure and the first limiting structure in the transverse direction, wherein the transverse direction refers to the vertical direction of the extension direction of the cylinder body.
[0006] The cylinder body can have one or more, and the inner diameter of a single cylinder body is φ1200mm-φ1300mm, the outer diameter is φ1240mm-φ1340mm, and the height of the cylinder body is 270mm-370mm. The actual size can be adjusted according to the size of the furnace.
[0007] The cylinder body is provided with multiple layers of through holes in the side wall along the extension direction, wherein in the transverse direction, the hole diameter of each layer of through holes is equal, and in the extension direction of the cylinder body, the hole diameter of the multiple layers of through holes decreases by 5%-20% from the bottom to the top, and the through holes correspond in the extension direction of the cylinder body.
[0008] In a possible implementation, the first limiting structure is an annular step, the annular step is located on the inner side wall of the barrel, and the second limiting structure is integrally formed with the barrel cover and is a circular plate, the circular plate overlaps the first limiting structure.
[0009] In a possible implementation, the diameter of the through hole is φ15mm-φ50mm, and the distance between adjacent through holes in the same layer is 10mm-20mm, which is the distance between the edges or boundaries of adjacent through holes.
[0010] In a possible implementation, the side wall of the barrel is further provided with an auxiliary carrying hole penetrating through the front and back, the diameter of the auxiliary carrying hole is φ50mm-φ150mm, and the distance between adjacent auxiliary carrying holes in the transverse direction is 500mm-1000mm, which is the distance between the edges or boundaries of adjacent auxiliary carrying holes.
[0011] In a possible implementation, the through hole is frustoconical, and the diameter of the through hole near the outer side wall is larger than the diameter of the through hole near the inner side wall.
[0012] In a possible implementation, the diameter of the through hole near the outer side wall is 10%-30% larger than the diameter of the through hole near the inner side wall.
[0013] In a possible implementation, the barrel includes a plurality of sub-barrels coaxially distributed in the extension direction, wherein the sub-barrel connected with the barrel cover is defined as a first barrel, the remaining sub-barrels are defined as second barrels, the bottom of the first barrel is provided with the third limiting structure, the top of the second barrel is provided with the fourth limiting structure matched with the third limiting structure, and a gap is kept in the transverse direction between the third limiting structure and the fourth limiting structure.
[0014] In a possible implementation, the second barrel has a plurality of sub-barrels, and adjacent second barrels are matched through the gap between the third limiting structure and the fourth limiting structure.
[0015] In a possible implementation, the third limiting structure and the fourth limiting structure are both annular steps, wherein the third limiting structure is located on the outer side wall of the first barrel, the fourth limiting structure is located on the inner side wall of the second barrel, and the first barrel overlaps the fourth limiting structure through the third limiting structure.
[0016] In a possible implementation, the bottom of the first cylinder is provided with a semicircular protrusion, the top of the second cylinder is provided with a semicircular groove in gap fit with the semicircular protrusion, and the semicircular protrusion and the semicircular groove are in gap fit between adjacent second cylinders.
[0017] Beneficial effects: compared with the prior art, the graphite cylinder for the high-temperature furnace provided by the application can adjust the local escape resistance of the gas flow, ensure the uniform penetration of the gas flow in the vertical direction, and ensure the uniformity of the gas at each part of the cylinder, thereby improving the uniformity of the purity of the material in the cylinder.
[0018] The auxiliary carrying hole is arranged on the side wall of the cylinder, which facilitates the operation personnel or the carrying machine to carry and install the cylinder.
[0019] The through hole is in the shape of a truncated cone, and the aperture near the outer side wall is larger than the aperture near the inner side wall, which can avoid the gas from escaping too fast, can prolong the contact time of the gas and the material, has good treatment effect, and can better diffuse after the gas escapes, thereby reducing the backflow of impurity gas.
[0020] These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description. BRIEF DESCRIPTION OF DRAWINGS
[0021] Fig. 1 A three-dimensional structure schematic diagram of the graphite cylinder for the high-temperature furnace is shown.
[0022] Fig. 2 An explosion structure schematic diagram of the graphite cylinder for the high-temperature furnace is shown.
[0023] Fig. 3 A partial cross-sectional structure schematic diagram and a partial enlarged structure schematic diagram of the graphite cylinder for the high-temperature furnace are shown. DETAILED DESCRIPTION
[0024] The following description is provided to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only examples, and other obvious modifications can be made by those skilled in the art. The basic principles of the present application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.
[0025] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.
[0026] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.
[0027] refer to Figs. 1 to 3 This application provides a graphite cylinder for a high-temperature furnace, including a cylinder cover 10 and a cylinder body 20. The top of the cylinder body 20 is provided with a first limiting structure 21 along the circumferential direction, and the bottom of the cylinder cover 10 is provided with a second limiting structure 11 that cooperates with the first limiting structure 21. A gap α is maintained between the second limiting structure 11 and the first limiting structure 21 in the lateral direction. The gap α serves as an expansion gap and can be reserved to a depth of 2mm to 8mm. During operation, it can ensure that the cylinder body will not deform due to thermal expansion, thereby reducing the gas leakage rate. The lateral direction refers to the direction perpendicular to the extension direction of the cylinder body 20.
[0028] The cylinder 20 may be one or more, and the inner diameter of a single cylinder 20 is φ1200mm~φ1300mm, the outer diameter is φ1240mm~φ1340mm, and the height of the cylinder 20 is 270mm~370mm. The actual size can be adjusted according to the furnace size.
[0029] The cylinder 20 has multiple layers of through holes 201 on its side wall along the extension direction. In the transverse direction, the diameter of each layer of through holes 201 is equal. Meanwhile, in the extension direction of the cylinder 20, the diameter of the multiple layers of through holes 201 decreases by 5% to 20% from the bottom to the top. The through holes 201 are corresponding in the extension direction of the cylinder 20. This can adjust the local escape resistance of the airflow, so that when the airflow enters rapidly from the bottom of the cylinder 20, it can maintain the uniformity of penetration in the vertical direction, thereby ensuring the uniformity of gas in all places and improving the uniformity of the purity of the material inside the cylinder.
[0030] In one embodiment, the first limiting structure 21 is an annular step, and the annular step is located on the inner sidewall of the cylinder 20. The second limiting structure 11 is integrally formed with the cylinder cover 10 to form a circular plate, wherein the circular plate overlaps the first limiting structure 21.
[0031] If the number of through holes 201 is too large, or the diameter of the holes is too large, it will weaken the overall strength of the cylinder 20, especially when multiple holes are stacked, which poses a risk of cracking. Conversely, if the number of through holes 201 is too small, or the diameter of the holes is too small, the goal of uniform gas distribution during operation cannot be achieved. Therefore, in one embodiment, the diameter of the through holes 201 is φ15mm to φ50mm, and the spacing between adjacent through holes 201 in the same layer is 10mm to 20mm. This spacing refers to the distance between the edges or boundaries of adjacent through holes 201.
[0032] In one embodiment, the side wall of the cylinder 20 is also provided with an auxiliary transport hole 202 that runs through the front and rear. The diameter of the auxiliary transport hole 202 is φ50mm to φ150mm, and in the lateral direction, the distance between adjacent auxiliary transport holes 202 is 500mm to 1000mm. This distance refers to the distance between the edges or boundaries of adjacent auxiliary transport holes 202, so as to facilitate the transport and installation of the cylinder by operators or transport machinery.
[0033] In one embodiment, the through hole 201 is frustoconical, and the diameter of the through hole 201 near the outer wall is larger than the diameter near the inner wall. Preferably, the diameter of the through hole 201 near the outer wall is 10% to 30% larger than the diameter near the inner wall. This avoids the problem of gas escaping too quickly, prolongs the contact time between the gas and the material inside the cylinder 20, and allows the gas to diffuse better after escaping, reducing the backflow of impurity gas and helping to improve the purity of the material.
[0034] In one embodiment, the cylindrical body 20 includes a plurality of sub-cylinders coaxially distributed in the extending direction. The sub-cylinder connecting to the cylindrical cover 10 is defined as the first cylindrical body 22, and the remaining sub-cylinders are defined as the second cylindrical body 23. The bottom of the first cylindrical body 22 is provided with a third limiting structure 221, and correspondingly, the top of the second cylindrical body 23 is provided with a fourth limiting structure 231 that cooperates with the third limiting structure 221. A lateral gap is maintained between the third limiting structure 221 and the fourth limiting structure 231. Similarly, the third limiting structure... The cooperation between structure 221 and the fourth limiting structure 231 can, on the one hand, enable the overlapping of multiple sub-cylinders, and thus allow them to be stacked to meet the loading requirements of different sizes and heights. On the other hand, the gap can also prevent thermal expansion deformation and help reduce the gas leakage rate. When there are multiple second cylinders 23, the multiple second cylinders 23 are also overlapped and cooperated with each other through the third limiting structure 221 and the fourth limiting structure 231, and a gap is maintained between the third limiting structure 221 and the fourth limiting structure 231 in the lateral direction.
[0035] More preferably, the third limiting structure 221 and the fourth limiting structure 231 are both annular steps, wherein the third limiting structure 221 is located on the outer side wall of the first cylinder 22, and the fourth limiting structure 231 is located on the inner side wall of the second cylinder 23, and the first cylinder 22 is connected to the fourth limiting structure 231 through the third limiting structure 221.
[0036] In one embodiment, the bottom of the first cylinder 22 is provided with a semi-circular protrusion 222, and correspondingly, the top of the second cylinder 23 is provided with a semi-circular groove 232 that fits with the semi-circular protrusion 222. Adjacent second cylinders 23 are connected by the semi-circular protrusion 222 and the semi-circular groove 232 through the gap fit. Thus, the semi-circular protrusion 222 and the semi-circular groove 232 can play a positioning role, which makes it convenient for the sub-cylinders to be quickly and accurately assembled into place, and can also ensure the consistency of each assembly. In addition, the gap fit design can also avoid the problem of thermal expansion deformation and reduce the gas leakage rate.
[0037] It should be noted that the terms "first, second, third and fourth" used in this application are for descriptive purposes only, do not indicate any order, and should not be construed as indicating or implying relative importance. These terms can be interpreted as names.
[0038] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.
Claims
1. A graphite cartridge for a high temperature furnace, characterized by, The application relates to a cylinder cover and a cylinder body, wherein the top of the cylinder body is provided with a first limiting structure in the circumferential direction, the bottom of the cylinder cover is provided with a second limiting structure matched with the first limiting structure, and a gap is kept between the second limiting structure and the first limiting structure in the transverse direction, wherein the transverse direction is the vertical direction of the extending direction of the cylinder body. The cylinder body is provided with a plurality of layers of through holes in the extending direction of the side wall, wherein the hole diameter of each layer of the through holes is equal in the transverse direction, the hole diameter of the plurality of layers of the through holes is reduced by 5-20% from the bottom to the top in the extending direction of the cylinder body, and the through holes correspond in the extending direction of the cylinder body.
2. The graphite cartridge for a high temperature furnace of claim 1, wherein, The first limiting structure is an annular step, the annular step is located on the inner side wall of the cylinder body, the second limiting structure is integrally formed with the cylinder cover to form a circular plate, and the circular plate is overlapped on the first limiting structure.
3. The graphite cartridge for a high temperature furnace of claim 1, wherein, The hole diameter of the through hole is phi 15 mm to phi 50 mm, and the distance between adjacent through holes in the same layer is 10 mm to 20 mm.
4. The graphite cartridge for a high temperature furnace of claim 3, wherein, The side wall of the cylinder body is further provided with front and rear through auxiliary carrying holes, the hole diameter of the auxiliary carrying hole is phi 50 mm to phi 150 mm, and the distance between adjacent auxiliary carrying holes in the transverse direction is 500 mm to 1000 mm.
5. The graphite cartridge for a high temperature furnace of claim 1, wherein, The through hole is in the shape of a frustum of a cone, and the hole diameter of the through hole near the outer side wall is larger than that near the inner side wall.
6. The graphite cartridge for a high temperature furnace of claim 5, wherein, The hole diameter of the through hole near the outer side wall is 10% to 30% larger than that near the inner side wall.
7. The graphite cartridge for a high temperature furnace of claim 1, wherein, The cylinder body comprises a plurality of sub-cylinder bodies distributed coaxially in the extending direction, wherein the sub-cylinder body connected with the cylinder cover is defined as a first cylinder body, the remaining sub-cylinder bodies are defined as second cylinder bodies, the bottom of the first cylinder body is provided with a third limiting structure, the top of the second cylinder body is provided with a fourth limiting structure matched with the third limiting structure, and a gap is kept between the third limiting structure and the fourth limiting structure in the transverse direction.
8. The graphite cartridge for a high temperature furnace of claim 7, wherein, The second cylinder body has a plurality of second cylinder bodies, and adjacent second cylinder bodies are matched through the gap of the third limiting structure and the fourth limiting structure.
9. The graphite cartridge for a high temperature furnace of claim 8, wherein, The third limiting structure and the fourth limiting structure are both annular steps, wherein the third limiting structure is located on the outer side wall of the first cylinder body, the fourth limiting structure is located on the inner side wall of the second cylinder body, and the first cylinder body is overlapped on the fourth limiting structure through the third limiting structure.
10. The graphite cartridge for a high temperature furnace of claim 7, wherein, The bottom of the first cylinder body is provided with a semicircular protrusion, the top of the second cylinder body is provided with a semicircular groove matched with the semicircular protrusion in the gap, and adjacent second cylinder bodies are matched through the gap of the semicircular protrusion and the semicircular groove.