Crucible and melting equipment

Abstract

The utility model discloses a crucible and melting equipment relates to glass processing technical field, crucible includes inner main part and jacket, the inner main part encloses and forms the melting chamber, the melting chamber is set to place the molten glass, the jacket covers the inner main part's side back to the melting chamber, the jacket and inner main part detachable connection. The utility model aims to improve the overall strength of the crucible, so that the deformation of the crucible at high temperature is reduced, and the safety is improved.

Description

crucibles and melting equipment Technical Field

[0001] This utility model relates to the field of glass processing technology, and in particular to a crucible and melting equipment. Background Technology

[0002] The firing, melting, and storage of molten glass are usually carried out using metal or non-metal crucibles or similar vessels.

[0003] When melting glass at temperatures above 1700°C, a medium-frequency furnace is required. During the heating process, localized high temperatures are generated in the crucible. At these high temperatures, the overall strength of the crucible decreases, and some areas may become very soft. This can cause the crucible to deform when it is picked up to pour the glass, posing a certain safety hazard. Summary of the Invention

[0004] The main purpose of this invention is to provide a crucible and melting equipment, which aims to improve the overall strength of the crucible, thereby facilitating the clamping and tilting of the crucible, reducing the deformation of the crucible at high temperatures, and improving safety.

[0005] To achieve the above objectives, this utility model proposes a crucible, the crucible comprising:

[0006] The inner body encloses a molten cavity, which is configured to hold molten glass; and

[0007] An outer cover covers the inner body on the side facing away from the melting cavity, and the outer cover is detachably connected to the inner body.

[0008] In one embodiment, the outer shell includes a support layer and a cushioning layer, the support layer being detachably connected to the outer periphery of the inner body;

[0009] The buffer layer is located on the side of the support surface facing the inner body, and the buffer layer abuts against the outer periphery of the inner body.

[0010] In one embodiment, the support layer is a grid structure, which includes a solid part and a hollow part. The solid part surrounds the inner body and is detachably connected to the inner body.

[0011] The solid portion encloses the hollow portion to form the hollow portion, and the buffer layer fills the hollow portion and is connected to the solid portion.

[0012] In one embodiment, the support layer has an annular protrusion on the side facing away from the inner body, and the annular protrusion is arranged around the inner body;

[0013] And / or, the support layer has an annular groove on the side facing away from the inner body, and the annular groove surrounds the inner body.

[0014] In one embodiment, the outer casing further includes an interface layer disposed on the buffer layer;

[0015] One side of the interface layer abuts against the inner body, and the other side of the interface layer abuts against the buffer layer. The interface layer is configured to isolate the inner body and the buffer layer.

[0016] In one embodiment, the inner body has a first thread on the circumferential surface facing away from the melting cavity, and the support surface has a second thread on the side facing the inner body.

[0017] The first thread and the second thread are threaded together.

[0018] In one embodiment, the inner body includes a bottom and a sidewall, the sidewall being annularly disposed on the bottom, and the bottom and the sidewall enclosing a melting cavity having a one-way opening;

[0019] The support layer is detachably connected to the bottom and / or the sidewall.

[0020] In one embodiment, the bottom and / or the sidewall are provided with threaded blind holes, the openings of which are oriented toward the support layer;

[0021] The support layer has a threaded through hole corresponding to the threaded blind hole. The crucible also includes bolts, which are sequentially inserted into the threaded through hole and the threaded blind hole to thread the support layer and the inner body.

[0022] In one embodiment, the sidewall is provided with at least two threaded blind holes, and the threaded blind holes are evenly spaced and centrally symmetrical;

[0023] And / or, the bottom is provided with at least two threaded blind holes, and each threaded blind hole is evenly spaced in one of the following arrangements: a ring array, a rectangular array, or a linear array;

[0024] And / or, the threaded through hole has a countersunk groove at one end facing away from the threaded blind hole, and the countersunk groove is configured to accommodate the bolt.

[0025] This utility model also proposes a melting device, the melting device comprising:

[0026] Medium frequency heating furnace; and

[0027] The crucible described above.

[0028] The crucible of this invention includes an inner body and an outer jacket. The inner body encloses and forms a melting cavity, which is used to hold molten glass. The outer jacket covers the side of the inner body facing away from the melting cavity and is detachably connected to the inner body. By setting the outer jacket outside the inner body, the outer jacket provides mechanical support to the inner body, thereby improving the overall structural strength and stability of the crucible at high temperatures and preventing safety problems caused by the reduction in structural strength of the inner body due to softening at high temperatures. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 is a schematic diagram of the crucible structure in one embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of the crucible structure in another embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of the crucible structure in another embodiment of this utility model.

[0033] Explanation of icon numbers:

[0034] 100. Crucible; 1. Inner body; 11. Bottom; 12. Side wall; 13. Melting chamber; 14. Threaded blind hole; 2. Outer shell; 21. Support layer; 211. Threaded through hole; 22. Buffer layer; 3. Bolt.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] Please refer to Figures 1 to 3. This utility model proposes a crucible 100, which includes an inner body 1 and an outer shell 2. The inner body 1 encloses and forms a melting cavity 13, which is configured to hold molten glass. The outer shell 2 covers the side of the inner body 1 facing away from the melting cavity 13, and the outer shell 2 is detachably connected to the inner body 1.

[0040] In this embodiment, the inner body 1 refers to an independent structural component used to directly contain molten glass. The inner body 1 has a bowl-shaped structure with a circular bottom and upward-extending, slightly outward-sloping sidewalls, forming an enclosed molten cavity 13. The opening of the molten cavity 13 faces upward and is used to place and hold the molten glass. Specifically, it can be made of high-temperature resistant materials, such as platinum-rhodium crucibles, alumina ceramics, or graphite. By enclosing the molten cavity 13, it can hold the high-temperature molten glass. Its structural strength directly affects the deformation resistance of the crucible 100. The outer shell 2 refers to an auxiliary structure wrapped around the inner body 1. Specifically, it can be made of metal mesh or composite layered materials. By covering the inner body 1, it forms an external support layer 21, which applies mechanical constraints to the inner body 1 under high-temperature conditions to prevent overall deformation of the inner body 1 due to thermal softening.

[0041] The detachable connection between the inner body 1 and the outer sleeve 2 refers to the physical fixation between the outer sleeve 2 and the inner body 1 via threads, bolts 3, or snap-fit ​​mechanisms. For example, threaded structures can be provided at corresponding positions on the outer periphery of the inner body 1 and the inner side of the outer sleeve 2, allowing for detachment through threaded connections. Alternatively, multiple corresponding connection holes can be provided on the outer side of the inner body 1 and the inner side of the outer sleeve 2, allowing for detachment through bolt connections. This allows the outer sleeve 2 to be disassembled for maintenance or replacement independently, preventing overall structural failure due to localized damage, and also dispersing thermal stress concentration through a split design. In use, the inner body 1 is placed inside the outer sleeve 2 and fixed using the detachable connection method. Molten glass is placed in the melting chamber 13 of the inner body 1 for heating and melting. When it is necessary to pour the molten glass, the operator can use the outer sleeve 2 to move the entire crucible 100, avoiding direct contact with the potentially softened inner body 1.

[0042] Understandably, the inner body 1, as the part directly in contact with the molten glass, forms an independent melting cavity 13 through an enclosing structure to realize the function of holding the glass. The outer sleeve 2, as a supporting structure, covers the outside of the inner body 1 and forms a double-layer structure with the inner body 1 through a detachable connection. Under high-temperature working conditions, the inner body 1 bears direct heat load and may soften locally. At this time, the outer sleeve 2 plays a mechanical support role, forming an external rigid constraint on the softened inner body 1, preventing the overall deformation of the inner body 1 caused by high-temperature softening, and improving the structural strength of the crucible 100. When it is necessary to pick up the crucible 100 to pour the molten glass, the outer sleeve 2 can effectively prevent the inner body 1 from deforming, avoiding safety hazards. The double-layer thermal stress dispersion mechanism reduces the risk of overall deformation, enabling the crucible 100 to maintain good structural stability in high-temperature environments. At the same time, the detachable connection design allows the outer sleeve 2 to be maintained or replaced separately, improving the maintenance convenience of the crucible 100.

[0043] Understandably, this application addresses the deformation problem of the crucible 100 caused by a decrease in overall strength under high-temperature conditions. The split-type structural design improves the structural stability of the crucible 100 under high-temperature conditions. The outer jacket 2 provides mechanical support for the inner body 1, preventing overall deformation due to softening at high temperatures and improving the structural strength of the crucible 100. The detachable connection design allows the outer jacket 2 to be maintained or replaced independently, avoiding the scrapping of the entire crucible 100 due to local damage and reducing maintenance costs. The split-type structure also helps to disperse thermal stress, reducing the risk of structural failure. This design effectively prevents deformation of the crucible 100 when pouring molten glass, improving operational safety. Overall, this solution improves the service life and reliability of the crucible 100 under high-temperature conditions, providing a safer and more economical solution for high-temperature glass melting processes.

[0044] In one embodiment, as shown in Figures 1 to 3, the outer jacket 2 includes a support layer 21 and a buffer layer 22. The support layer 21 is detachably connected to the outer periphery of the inner body 1. The buffer layer 22 is disposed on the side of the support layer 21 facing the inner body 1 and abuts against the outer periphery of the inner body 1.

[0045] In this embodiment, the outer casing 2 includes a support layer 21 and a buffer layer 22. The support layer 21 is made of a high-temperature alloy or silicon carbide composite material, such as stainless steel or titanium alloy, and has high strength and high-temperature resistance. The support layer 21 is detachably connected to the outer periphery of the inner body 1 via a threaded connection or a snap-fit ​​structure. The buffer layer 22 is made of a high-temperature resistant elastic material, such as ceramic fiber felt, high-temperature silicone, or graphite-based composite material. The buffer layer 22 is disposed on the side of the support layer 21 facing the inner body 1, directly abutting against the outer periphery of the inner body 1. The support layer 21 and the buffer layer 22 can be connected by adhesive or mechanical fastening. During use, the support layer 21 provides rigid support, while the buffer layer 22 absorbs thermal expansion differences and vibration energy, jointly protecting the inner body 1.

[0046] Specifically, when the inner body 1 is subjected to external mechanical loads, the support layer 21 distributes the load to the entire outer shell 2 through a rigid structure, preventing stress concentration in a localized area of ​​the inner body 1. The buffer layer 22 absorbs the dimensional changes of the inner body 1 caused by thermal expansion through elastic deformation. For example, it can compensate for a thermal expansion difference of 0.1-0.5 mm under operating conditions of 800-1600℃. The detachable connection between the support layer 21 and the inner body 1 allows for the individual replacement of damaged parts. For example, during maintenance, only the support layer 21 can be removed without affecting the contact interface between the buffer layer 22 and the inner body 1. The buffer layer 22 continuously abuts against the outer surface of the inner body 1, reducing wear on the contact surface through its material properties with a friction coefficient of less than 0.15. For example, the surface of the buffer layer 22 with a boron nitride coating can reduce the wear rate to less than 0.01 mm per hour. The combined structure of the support layer 21 and the buffer layer 22 gives the outer shell 2 both compressive strength and deformation adaptability. In high-temperature testing, the deformation of the inner body 1 can be controlled within 0.3 mm, which is more than 60% lower than that of a single-layer structure.

[0047] Understandably, the support layer 21 provides a rigid structure, effectively dispersing the mechanical stress on the inner body 1 and preventing local stress concentration. The buffer layer 22 acts as a buffer between the inner body 1 and the support layer 21, reducing frictional losses caused by direct contact. This layered design allows the outer jacket 2 to better adapt to the thermal expansion and deformation of the inner body 1 under high-temperature conditions, improving the overall structural stability and service life of the crucible 100. At the same time, the detachable connection design facilitates maintenance and replacement, further improving the practicality of the crucible 100.

[0048] In one embodiment, as shown in Figures 1 to 3, the support layer 21 is a grid structure, which includes a solid part and a hollow part. The solid part surrounds the inner body 1 and is detachably connected to the inner body 1. The solid part encloses the hollow part to form the hollow part, and the buffer layer 22 fills the hollow part and is connected to the solid part.

[0049] In this embodiment, the solid parts can be formed into a frame with a continuous ring distribution through machining or casting. The grid structure can be made of metal materials, such as stainless steel or titanium alloy. The solid parts can be designed as interconnected rods. The hollow parts are the gaps between the grids. The shape of the hollow parts can be designed as one of hexagonal honeycomb, square grid, or triangular staggered arrangement. The area of ​​the hollow parts accounts for 40%-70% of the total surface area of ​​the grid structure. The buffer layer 22 can be made of carbon fiber composite material or ceramic fiber felt, and is filled into the hollow parts by high-temperature injection molding, pressing, or casting. The connection between the solid parts and the inner body 1 can be a threaded fit structure. Furthermore, the edges of the hollow parts of the grid structure can be provided with a chamfer structure with a chamfer radius ranging from 0.5 to 2 mm to guide the flow of the buffer layer 22 material.

[0050] Specifically, the solid part of the grid structure forms a closed-loop skeleton structure that extends circumferentially along the outer surface of the inner main body 1. Its rigid support ensures structural stability during high-temperature expansion. The discrete distribution of the hollow parts allows the buffer layer 22 to form multiple independent interlocking units. The lateral stress generated by each unit during thermal expansion is restricted by the adjacent solid parts. The longitudinal expansion space is reserved in the height direction of the hollow parts. When the inner main body 1 expands radially due to heat, the ring constraint force of the solid parts and the three-dimensional deformation of the buffer layer 22 form a dynamic balance. The buffer layer 22 can generate a certain volume expansion within the hollow parts. During the temperature gradient change, the contact interface between the solid parts and the buffer layer 22 generates frictional resistance through mechanical interlocking, effectively preventing interlayer slippage. By dividing the buffer layer 22 into multiple independent units, the thermal stress transmission path is reconstructed into a mesh distribution pattern, reducing local thermal stress changes.

[0051] Understandably, the solid part of the space frame structure forms a rigid skeleton that continuously surrounds the inner main body 1, providing stable load-bearing capacity. After the hollow part is filled with the buffer layer 22, a mechanical interlocking structure is formed to prevent the buffer layer 22 from creeping and falling off due to softening at high temperature. The three-dimensional expansion of the buffer layer 22 in the hollow part can absorb thermal stress and achieve multi-point distributed buffering. The buffer layer 22 filled in the hollow part forms a three-dimensional constraint, effectively preventing the buffer layer 22 from falling off and enhancing the overall thermal stress absorption capacity. This structural design maintains lightweight while dividing the buffer layer 22 into multiple independent units through distributed hollow areas, avoiding the single stress transmission path. Under high temperature conditions, this structure can achieve multi-point distributed buffering, effectively reducing the risk of fracture of the support layer 21 caused by local thermal stress concentration, and improving the structural stability and service life of the crucible 100 in high temperature environment.

[0052] In one embodiment, the support layer 21 has an annular protrusion on the side facing away from the inner body 1, and the annular protrusion surrounds the inner body 1; alternatively, the support layer 21 has an annular groove on the side facing away from the inner body 1, and the annular groove surrounds the inner body 1.

[0053] In this embodiment, the annular protrusion increases the frictional resistance of the contact surface through the protruding structure, for example, by using a trapezoidal or semi-circular cross section. The annular groove accommodates the protruding parts of the external equipment through the recessed structure, for example, by using a V-shaped groove or a U-shaped groove. The protrusion and groove can be set separately or used in combination. When combined, the two are arranged at intervals along the axial direction of the support layer 21 to form a dual positioning structure. The circumferential arrangement controls the circumferential positioning accuracy within ±0.5 mm, for example, by using a continuous annular or segmented annular arrangement.

[0054] Specifically, when the support layer 21 is connected to the medium-frequency heating furnace, the annular protrusion is embedded in the corresponding groove of the furnace body. The radial constraint force is generated by the contact between the inclined surfaces on both sides of the flange and the groove wall, which restricts horizontal displacement. At the same time, the annular groove accommodates the furnace body positioning pin, and the contact between the bottom of the groove and the end face of the pin provides axial limitation. The combination of the protrusion and the groove forms a two-way interlock during assembly, eliminating displacement deviation caused by thermal expansion of materials at high temperatures. When the support layer 21 adopts a grid structure, the protrusion or groove in the solid part can avoid the problem of insufficient structural strength of the hollow part. For example, an annular steel strip is welded to the outer periphery of the solid part to form a protrusion. This structure allows the crucible 100 to maintain positioning accuracy under operating conditions of 1600-1800℃, reducing the assembly deviation to less than 1 mm. Moreover, the locking can be released by rotation or axial removal during disassembly, improving maintenance efficiency by more than 30%.

[0055] It is understood that this application forms a positioning structure for docking with external equipment by providing an annular protrusion and / or annular groove on the side of the support layer 21 facing away from the inner main body 1. The annular protrusion increases the frictional resistance of the contact surface through a physical flange, achieving rapid positioning and anti-slip when engaging with external equipment. The annular groove accommodates the corresponding protruding parts of the external equipment through a recessed structure, forming an interlocking effect. These two structures can be used independently or in combination. Their circumferential arrangement ensures a uniform force distribution around the support layer 21, avoiding local stress concentration. As a result, the connection interface between the support layer 21 and the external equipment forms a stable mechanical fit, eliminating the risk of slippage during assembly and ensuring that the crucible 100 maintains a stable installation state under the high-temperature conditions in the medium-frequency heating furnace.

[0056] In one embodiment, the outer casing 2 further includes an interface layer disposed on the buffer layer 22; one side of the interface layer abuts against the inner body 1, and the other side of the interface layer abuts against the buffer layer 22, and the interface layer is configured to isolate the inner body 1 and the buffer layer 22.

[0057] In this embodiment, the interface layer can be made of silicon nitride or aluminum oxide, with a thickness controlled between 0.1-0.5 mm. Its temperature resistance must be higher than that of the buffer layer 22 material, for example, a temperature resistance range exceeding 1700℃. The contact surface between the interface layer and the inner body 1 can be processed into a mirror finish or polished to reduce contact stress. The connection method between the interface layer and the buffer layer 22 can be thermal spraying combined with mechanical interlocking. The mechanical interlocking structure can be designed as a dovetail groove or a T-groove. When the support layer 21 adopts a grid structure, the interface layer can cover the surface of the solid part of the grid structure, and the coverage area must reach more than 80% to ensure the isolation effect. The thermal expansion coefficient of the interface layer needs to be between the material of the inner body 1 and the material of the buffer layer 22. For example, when the inner body 1 is zirconia ceramic and the buffer layer 22 is graphite, the interface layer can be made of silicon carbide. The interface layer can be set with a multi-layer composite structure, such as a boron nitride coating at the bottom and a yttrium-stabilized zirconia coating at the top to form a gradient thermal barrier. When the support layer 21 is fixed to the inner body 1 by a threaded connection, the interface layer can extend to the threaded connection area to form a continuous isolation layer on the threaded meshing surface to prevent material diffusion between the threaded pairs at high temperatures.

[0058] Specifically, an interface layer covers the space between the inner body 1 and the buffer layer 22, eliminating direct contact between the two through physical barrier. The interface layer can be fixed to the surface of the inner body 1 by spraying, coating, or pre-forming and then bonding. By setting the interface layer, the inner body 1 and the buffer layer 22 are effectively isolated, preventing direct contact and interaction between the two at high temperatures.

[0059] Understandably, this application achieves physical isolation between the inner body 1 and the buffer layer 22 by adding an interface layer between the buffer layer 22 and the inner body 1. One side of the interface layer abuts against the inner body 1, and the other side abuts against the buffer layer 22, effectively blocking direct contact between the material of the buffer layer 22 and the surface of the inner body 1. This design avoids chemical reactions or physical penetration between the two materials under high-temperature conditions, while retaining the stress-buffering function of the buffer layer 22 on the support layer 21. Furthermore, the choice of interface layer material effectively prevents volatiles or melts that may be generated by the buffer layer 22 from eroding the inner body 1. This dual isolation effect significantly improves the structural stability and service life of the crucible 100 under extreme temperature environments while maintaining the original buffering and support effect.

[0060] In one embodiment, the inner body 1 has a first thread on the circumferential surface of the side facing away from the melting cavity 13, and the support layer 21 has a second thread on the side facing the inner body 1; the first thread and the second thread are threaded together.

[0061] In this embodiment, the first thread is configured as a spiral protrusion extending continuously along the outer wall of the inner body 1, and the second thread is configured as a spiral groove with the opposite direction of the first thread, so that the thread meshing surface can withstand axial loads at high temperatures without plastic deformation. The contact surface of the support layer 21 facing the inner body 1 is processed into a groove that forms a clearance fit with the first thread. The contact area between the second thread and the first thread on the inner wall of the groove is set to cover more than 60% of the total thread height, thereby enhancing the shear resistance.

[0062] Specifically, the first thread can be an external thread, and the second thread can be an internal thread. When the support layer 21 is assembled with the inner body 1 through rotational movement, the meshing of the first and second threads generates an axial clamping force, which can form a self-locking effect under the condition that the thread helix angle is 5-15 degrees. Under high-temperature conditions, the radial clearance at the threaded connection is compensated by the preload, avoiding connection failure caused by material expansion differences.

[0063] Understandably, this application provides a simple and reliable connection method, avoiding the problems of complex installation and inconvenient disassembly caused by traditional detachable connection methods. Quick connection or disassembly with the inner body 1 can be achieved by rotating the support layer 21. The threaded connection structure maintains stability under high-temperature environments, effectively preventing loosening or failure due to thermal expansion or material softening. Furthermore, this connection method improves the overall strength and safety of the crucible 100, and reduces maintenance time and costs.

[0064] In one embodiment, as shown in Figures 1 to 3, the inner body 1 includes a bottom 11 and a side wall 12. The side wall 12 is annularly disposed on the bottom 11, and the bottom 11 and the side wall 12 enclose a melting cavity 13 with a one-way opening. The support layer 21 is detachably connected to the bottom 11 and / or the side wall 12.

[0065] In this embodiment, the separate structure of the bottom 11 and the sidewall 12 allows the support layer 21 to be selectively fixed to the bottom 11, the sidewall 12, or both via a threaded connection. The bottom 11 is a circular flat plate, and the sidewall 12 is a cylindrical tube. The sidewall 12 is vertically fixed to the edge of the bottom 11, forming a cylindrical melting cavity 13 with a one-way opening. The outer casing 2 includes the support layer 21 and the buffer layer 22. The support layer 21 is a metal mesh structure, made of multiple metal strips woven together. The support layer 21 is detachably connected to the bottom 11 and the outer sidewall 12 via bolts 3. The outer side of the bottom 11 has multiple threaded holes evenly distributed in a ring, and the outer sidewall 12 has multiple threaded holes circumferentially distributed. The support layer 21 has through holes at corresponding positions, and the bolts 3 pass through the through holes and connect to the threaded holes, realizing the detachable connection between the support layer 21 and the inner body 1.

[0066] It is understood that, through the above technical solution, this application achieves multi-point connection between the support layer 21 and the bottom 11 and side wall 12 of the inner body 1. When high-temperature molten glass is contained in the melting cavity 13, the stress generated by the thermal expansion of the inner body 1 can be dispersed and transferred to the support layer 21 through multiple connection points of the bottom 11 and side wall 12, avoiding stress concentration in a single connection area and reducing the risk of local overload. At the same time, the split structure of the bottom 11 and the side wall 12 provides a stress buffer interface, further reducing the impact of thermal expansion on the connection structure. Thus, the stability and reliability of the connection between the support layer 21 and the inner body 1 are improved, and the risk of deformation or separation between the support layer 21 and the inner body 1 under high-temperature conditions is reduced.

[0067] In one embodiment, as shown in Figures 1 to 3, the bottom 11 and / or the sidewall 12 are provided with threaded blind holes 14, the openings of which face the support layer 21; the support layer 21 is provided with threaded through holes 211 corresponding to the threaded blind holes 14, and the crucible 100 also includes bolts 3, which are sequentially inserted into the threaded through holes 211 and the threaded blind holes 14 to threadedly connect the support layer 21 and the inner body 1.

[0068] In this embodiment, the inner body 1 of the crucible 100 is composed of a bottom 11 and an annular sidewall 12. Threaded blind holes 14 can be provided on the bottom 11 and / or the sidewall 12. For example, multiple threaded blind holes 14 are evenly distributed on the bottom 11 and / or the sidewall 12. Threaded through holes 211 are provided on the support layer 21 corresponding to the threaded blind holes 14. The diameter of the threaded through holes 211 matches that of the threaded blind holes 14. The bolt 3 is inserted in the same direction as the opening direction of the threaded blind holes 14. During installation, the bolt 3 is passed through the through holes of the support layer 21 and screwed into the blind holes of the inner body 1. The head of the bolt 3 is completely sunk into the conical groove on the back of the support layer 21.

[0069] In the space frame structure of the support layer 21, the solid part surrounds the inner body 1 and can be connected with the thread to form a composite fixed structure. When the support layer 21 is connected to the inner body 1 by the bolt 3, the solid part bears the radial load and the threaded connection bears the axial load, avoiding overload of a single connection point. The buffer layer 22 fills the hollow part of the support layer 21. When elastic deformation occurs at high temperature, the gap adjustment function of the threaded connection can compensate for the deformation of the buffer layer 22 and prevent misalignment between the support layer 21 and the inner body 1.

[0070] Specifically, the opening direction of the threaded blind hole 14 is consistent with the installation direction of the support layer 21, so that when the bolt 3 is subjected to axial tensile force under high temperature conditions, the force on the thread engagement surface is evenly distributed. The thermal expansion of the inner body 1 material causes the threaded blind hole 14 to extend axially. The bolt 3 can maintain the preload by tightening in the same direction, avoiding loosening of the connection. The threaded through hole 211 of the support layer 21 is coaxially set with the threaded blind hole 14, allowing the bolt 3 to penetrate the support layer 21 and screw into the inner body 1 to form a through connection. When disassembly is required, the support layer 21 and the inner body 1 can be separated by rotating the bolt 3 in the opposite direction. The disassembly process does not damage the thread structure.

[0071] Understandably, through the mechanical locking and gap adjustment function of the threaded connection, a stable connection between the support layer 21 and the inner body 1 is achieved under the conditions of high temperature expansion and frequent disassembly and assembly, and the problem of insufficient stability of the connection structure under high temperature environment is effectively solved. The uniform force design of the threaded meshing surface can offset the stress concentration caused by thermal expansion. The through bolt 3 connection allows for quick disassembly and maintenance while ensuring axial tensile force.

[0072] In one embodiment, as shown in Figures 1 to 3, the sidewall 12 is provided with at least two threaded blind holes 14, and the threaded blind holes 14 are evenly spaced and centrally symmetrical; optionally, the bottom 11 is provided with at least two threaded blind holes 14, and the threaded blind holes 14 are evenly spaced in one of the following arrangements: an annular array, a rectangular array, or a linear array.

[0073] In this embodiment, at least two threaded blind holes 14 are opened in the circumferential direction of the sidewall 12, such as four threaded blind holes 14, with adjacent threaded blind holes 14 spaced at an angle of 90 degrees and distributed symmetrically with the central axis of the sidewall 12 as the center; at least two threaded blind holes 14 are opened in the bottom 11, such as six threaded blind holes 14 are evenly opened in the circumferential direction of the bottom 11 surface, with adjacent blind holes having a central angle of 60 degrees to form a ring array.

[0074] Specifically, when connecting the sidewall 12, the centrally symmetrical layout of the threaded blind holes 14 makes the radial forces generated by the fastening bolts 3 cancel each other out in the circumferential direction. For example, when using four sets of symmetrical blind holes, the included angle between two adjacent holes is strictly maintained at 90 degrees to avoid the sidewall 12 being torsional deformed due to angular deviation. The annular array arrangement of the bottom 11 makes the connection point form a closed-loop load transmission path along the edge of the bottom 11. For example, six annular array blind holes evenly distribute the glass melt pressure to the entire bottom 11. Compared with a single row of blind holes, the local stress can be reduced by more than 40%.

[0075] Understandably, this application effectively eliminates the stress concentration phenomenon caused by uneven distribution of threaded blind holes 14. The centrally symmetrical layout allows the sidewall 12 to bear a balanced radial constraint force at multiple fastening points, avoiding elliptical deformation caused by asymmetrical fastening. The annular array of threaded blind holes 14 at the bottom 11 forms a uniformly distributed load transfer path, so that each area of ​​the bottom surface of the inner body 1 is uniformly subjected to the pressure of the support layer 21.

[0076] Optionally, the threaded through hole 211 has a countersunk groove at one end facing away from the threaded blind hole 14. The countersunk groove is designed to accommodate the bolt 3. It is understood that the end of the threaded through hole 211 away from the threaded blind hole 14 is machined with a cylindrical countersunk groove. The inner diameter of the countersunk groove matches the diameter of the bolt 3 head, and the depth of the countersunk groove is equal to the height of the bolt 3 head. After the bolt 3 is screwed into the threaded blind hole 14, its head is completely submerged in the countersunk groove. The countersunk groove structure completely eliminates the axial protrusion of the bolt 3 head, preventing the connection from loosening due to collision during operation. At the same time, the contact surface between the countersunk groove sidewall and the bolt 3 head restricts the radial displacement of the bolt 3, enhancing the connection stability under high temperature and vibration conditions.

[0077] This utility model also proposes a melting device, which includes a medium-frequency heating furnace and the aforementioned crucible 100. The specific structure of the crucible 100 is as described in the foregoing embodiments. Since this melting device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be elaborated here.

[0078] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A crucible, characterized in that, The crucible includes: an inner body that encloses a melting cavity, the melting cavity being configured to hold molten glass; and an outer sleeve that covers the side of the inner body facing away from the melting cavity, the outer sleeve being detachably connected to the inner body.

2. The crucible as described in claim 1, characterized in that, The outer casing includes a support layer and a buffer layer. The support layer is detachably connected to the outer periphery of the inner body. The buffer layer is located on the side of the support layer facing the inner body and abuts against the outer periphery of the inner body.

3. The crucible as described in claim 2, characterized in that, The support layer is a grid structure, which includes a solid part and a hollow part. The solid part surrounds the inner body and is detachably connected to the inner body. The solid part encloses the hollow part to form the hollow part. The buffer layer fills the hollow part and is connected to the solid part.

4. The crucible as described in claim 2, characterized in that, The support layer has an annular protrusion on the side facing away from the inner body, and the annular protrusion surrounds the inner body; and / or, the support layer has an annular groove on the side facing away from the inner body, and the annular groove surrounds the inner body.

5. The crucible as described in claim 2, characterized in that, The outer casing also includes an interface layer disposed on the buffer layer; one side of the interface layer abuts against the inner body, and the other side of the interface layer abuts against the buffer layer, and the interface layer is configured to isolate the inner body and the buffer layer.

6. The crucible as described in any one of claims 2 to 5, characterized in that, The inner body has a first thread on the circumferential surface facing away from the melting cavity, and the support surface has a second thread on the side facing the inner body; the first thread and the second thread are threadedly connected.

7. The crucible as described in any one of claims 2 to 5, characterized in that, The inner body includes a bottom and a sidewall, the sidewall being annularly disposed on the bottom, and the bottom and the sidewall enclosing each other to form the melting cavity with a one-way opening; the support layer is detachably connected to the bottom and / or the sidewall.

8. The crucible as described in claim 7, characterized in that, The bottom and / or the sidewall are provided with threaded blind holes, the openings of which face the support layer; the support layer is provided with threaded through holes corresponding to the threaded blind holes; the crucible also includes bolts, which are sequentially inserted into the threaded through holes and the threaded blind holes to thread the support layer and the inner body.

9. The crucible as described in claim 8, characterized in that, The sidewall has at least two threaded blind holes, which are evenly spaced and centrally symmetrical; and / or, the bottom has at least two threaded blind holes, which are evenly spaced in one of the following arrangements: annular array, rectangular array, or linear array; and / or, the end of the threaded through hole facing away from the threaded blind hole has a countersunk groove, which is configured to accommodate the bolt.

10. A melting device, characterized in that, The melting equipment includes: a medium-frequency heating furnace; and a crucible as described in any one of claims 1 to 9.

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