A continuous smelting furnace mouth inner cover

Abstract

The utility model relates to continuous smelting furnace equipment technical field discloses a kind of continuous smelting furnace furnace mouth inner cover, including inner cover body, outer cover and the support assembly of connecting both. The support assembly includes hollow support rod, telescopic rod received in, rotating joint and tightening cover. Support rod is fixedly connected to outer cover, its end portion is equipped with thread and opening gap, inner wall is equipped with guide slot, telescopic rod and guide slot sliding fit, its other end is connected with inner cover body by rotating joint. Tightening cover is screwed on the thread of support rod, and opening gap is compressed to lock telescopic rod when screwing. The utility model passes through the support assembly of this telescopic, rotatable, effectively solve the problem that existing inner cover support structure is fixed, installation is tedious, poor stability, with length angle adjustable, installation is convenient, positioning accurate and fixed reliable advantage, significantly improve the applicability and operating stability of equipment.

Description

Technical Field

[0001] This utility model relates to the field of continuous melting furnace equipment technology, and in particular to an inner cover for the furnace mouth of a continuous melting furnace. Background Technology

[0002] Continuous melting furnaces are key thermal equipment used in industries such as photovoltaics and semiconductors to produce high-purity materials. During operation, the furnace opening is the crucial link between the high-temperature zone inside the furnace and the external environment; its temperature stability and effective gas management are vital to product quality and the production environment. Therefore, an inner cover is typically installed at the furnace opening, using a double-layer structure for insulation and providing a dedicated exhaust channel for the flue gas generated inside the furnace.

[0003] To securely mount the inner cover to the furnace opening and maintain a precise gap between the inner and outer layers, a support assembly is required for connection and fixation. In existing technologies, this support assembly typically employs a simple, fixed connecting rod, such as welding or bolting, to connect the inner and outer covers. The length and connection angle of this fixed support structure cannot be changed after manufacturing.

[0004] However, in actual production and installation, wear and tear from different batches of continuous melting furnaces or from long-term use of the same equipment can cause slight deviations in the furnace opening size or installation reference surface. Faced with this situation, the inherent limitations of fixed support assemblies become apparent. Installers must use inner covers with perfectly matched lengths and angles; any deviation makes installation extremely difficult, often requiring forced assembly or temporary shims to compensate. This not only significantly reduces installation efficiency but also makes it difficult to guarantee installation accuracy.

[0005] More importantly, this forced installation due to structural mismatch keeps the support components under constant stress, significantly reducing the reliability of the connection. Under the complex conditions of high temperature and micro-vibration in a continuous furnace, this unstable connection structure is prone to loosening or displacement, which not only damages the exhaust channels between the inner and outer covers, affecting product quality and the environmental protection level of the workshop, but may also pose safety hazards due to structural failure. Therefore, the existing inner cover support structure is rigid, lacks adjustment capabilities, and results in difficult installation and poor stability after fixing, which is a technical problem that urgently needs to be solved.

[0006] Therefore, this utility model proposes an inner cover for the furnace mouth of a continuous melting furnace to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems of rigid support structure, inability to adjust length and angle of the inner cover of the furnace mouth in the existing technology, which leads to cumbersome installation process, poor applicability and low reliability after fixing, this utility model aims to provide an inner cover of the furnace mouth with improved structure that can effectively solve the above problems.

[0008] This utility model provides an inner cover for a continuous melting furnace opening, comprising: an inner cover body and an outer cover body coaxially sleeved outside the inner cover body; and a support assembly for connecting the inner cover body and the outer cover body.

[0009] The bracket assembly consists of a hollow support rod, a telescopic rod, a rotating joint, and a tightening cover.

[0010] Furthermore, the end of the support rod away from the inner cover is fixedly connected to the inner wall of the outer cover, and its end facing the inner cover has a thread on its outer wall, and this end has an opening gap that allows it to contract radially; one end of the telescopic rod is slidably fitted in the inner cavity of the support rod, and its outer wall has a guide protrusion, which slidably fits with a guide groove extending axially from the inner wall of the support rod; the rotating joint is rotatably connected to the other end of the telescopic rod away from the support rod, and is fixedly connected to the outer wall of the inner cover; the tightening cap is screwed tightly onto the thread of the support rod, and the tightening action compresses the opening gap to lock the telescopic rod.

[0011] Preferably, a plurality of heat sinks are fixedly connected to the outer wall of the outer cover. These heat sinks can increase the surface area of ​​the outer cover and improve its heat dissipation efficiency, thereby preventing the cover from deforming due to long-term exposure to high-temperature environments. As a specific embodiment, the heat sinks are multiple fins arranged at equal intervals along the axial direction of the outer cover. This fin-like structure can maximize heat exchange with the surrounding air.

[0012] Preferably, the outer cover has an annular anti-slip groove at the end facing the furnace opening. The anti-slip groove increases the friction between the inner cover and the furnace opening, effectively preventing accidental sliding of the equipment due to vibration and other factors during operation, and improving the stability of the installation.

[0013] Preferably, the support rod is provided with a limiting protrusion near the thread. This limiting protrusion acts as a physical stop to prevent the tightening cap from being overtightened during the tightening process, thereby protecting the thread and rod structure and extending its service life.

[0014] Preferably, the rotating joint is provided with a through hole, which facilitates the insertion of fasteners or the use of special tools during installation or maintenance, and simplifies the assembly and maintenance process.

[0015] Preferably, the inner wall of the support rod has at least two guide grooves, which are evenly distributed along the circumference of the support rod. Correspondingly, the outer wall of the telescopic rod also has a matching number of guide protrusions. This multi-point guiding structural design greatly enhances the torsional resistance and stability of the telescopic rod during the extension and retraction process.

[0016] Preferably, the number of the support components is at least three, and they are evenly spaced along the circumference of the inner cover. By forming a stable structure with multi-point support, the inner and outer covers are firmly connected as one, ensuring the structural strength and operational stability of the entire inner cover device.

[0017] This utility model has the following beneficial effects: 1. In this utility model, by setting an inner and outer double-layer cover structure and an adjustable support assembly, the problems of inconvenient installation and fixing and poor adjustability of the inner cover of the furnace mouth in the prior art are solved, and the precise alignment and stable fixing of the inner cover and the furnace mouth are achieved, thereby improving the installation efficiency and operational stability.

[0018] 2. In this utility model, the stepless adjustment of the inner cover length is achieved through the cooperation of the support rod, telescopic rod and its guide protrusion and guide groove in the bracket assembly, and the relative rotation during the extension and retraction process is effectively prevented, ensuring the stability of the relative position and angle of the inner and outer covers, and adapting to the size requirements of different furnace openings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of an inner cover for a continuous melting furnace according to the present invention. Figure 2 This is a schematic diagram of the structure of a support assembly for the inner shroud of a continuous melting furnace according to the present invention. Figure 3 This is a schematic diagram of the structure of a support rod for the inner shroud of a continuous melting furnace according to the present invention. Figure 4 This is a schematic diagram of the structure of the telescopic rod of the inner cover of the continuous melting furnace according to the present invention.

[0020] Legend: 1. Inner cover; 2. Outer cover; 3. Support assembly; 31. Support rod; 32. Telescopic rod; 33. Tightening cover; 34. Rotating joint; 35. Thread; 36. Through hole; 37. Guide protrusion; 38. Limiting protrusion; 39. Guide groove; 4. Anti-slip groove; 5. Heat sink. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example: Please refer to... Figures 1 to 4 This utility model provides an inner cover for a continuous melting furnace opening, which aims to solve the problems in the prior art where the inner cover support structure is fixed and its length and angle cannot be adjusted, resulting in cumbersome installation and poor stability after fixing. Figure 1 and Figure 2 As shown, the inner cover of the continuous melting furnace opening includes an inner cover 1 and an outer cover 2. The outer cover 2 is coaxially sleeved on the outside of the inner cover 1. It also includes a support assembly 3, which connects the inner cover 1 and the outer cover 2. The support assembly 3 includes a hollow support rod 31. (Refer to...) Figure 2 and Figure 3 The end of the support rod 31 away from the inner cover 1 is fixedly connected to the inner wall of the outer cover 2. The outer wall of the end of the support rod 31 facing the inner cover 1 is provided with a thread 35, and this end has an opening slot that allows it to contract radially. The bracket assembly 3 also includes a telescopic rod 32, such as... Figure 4 As shown, one end of the telescopic rod 32 is slidably housed inside the support rod 31. The inner wall of the support rod 31 is provided with a guide groove 39 extending along its axial direction. The outer wall of the telescopic rod 32 is provided with a guide protrusion 37 that slides with the guide groove 39. The bracket assembly 3 also includes a rotating joint 34, which is rotatably connected to the other end of the telescopic rod 32 away from the support rod 31 and is fixedly connected to the outer wall of the inner cover 1. The bracket assembly 3 also includes a tightening cover 33, which is screwed tightly onto the thread 35 of the support rod 31. The tightening cover 33 is used to compress the opening gap to lock the telescopic rod 32.

[0022] To solve the aforementioned technical problems, the core of the technical solution in this embodiment lies in the fact that the inner cover of the continuous melting furnace opening also includes a support assembly 3. Furthermore, the support assembly 3 forms a specific structural fit and connection relationship with the inner cover 1 and the outer cover 2. The technical solution or technical feature needs to be described in detail and expressed logically clearly. It is not advisable to briefly describe or omit any technical features to avoid insufficient disclosure during patent examination. Please refer to [link / reference needed]. Figure 2 , Figure 3 and Figure 4The core structure is described in detail below: The support rod 31 has a hollow tubular structure. One end of the support rod 31, near the outer cover 2, is fixedly connected to the inner wall of the outer cover 2 by welding or bolts. The other end of the support rod 31 facing the inner cover 1 has threads 35 on its outer wall, and this end has an axially extending opening. The opening allows the end of the support rod 31 to have a certain elastic deformation capacity, enabling radial contraction. The inner wall of the support rod 31 has guide grooves 39 extending axially. There are at least two guide grooves 39, which are evenly distributed along the circumference of the support rod 31. The guide grooves 39 are used to provide guidance and anti-rotation functions for the telescopic rod 32. Meanwhile, the telescopic rod 32 is a solid cylinder, with one end slidably housed inside the support rod 31. The outer wall of the telescopic rod 32 has corresponding guide protrusions 37, the number of which matches the number of guide grooves 39, and their shapes are compatible with the guide grooves 39. In the assembled state, the guide protrusions 37 of the telescopic rod 32 slide within the guide grooves 39 of the support rod 31. This protrusion-groove fit structure ensures that the telescopic rod 32 does not rotate relative to the support rod 31 when it extends or retracts axially, thus maintaining the relative angular stability of the inner and outer covers and improving the installation accuracy and stability of the entire support assembly. The other end of the telescopic rod 32, away from the support rod 31, is rotatably connected to a rotating joint 34. The rotating joint 34 is connected to the telescopic rod 32 via a rotating mechanism such as a pivot or ball joint, allowing the telescopic rod 32 to rotate relative to the rotating joint 34 within a certain angular range. The rotating joint 34 is fixedly connected to the outer wall of the inner cover 1, specifically by welding or bolting its base to a suitable position on the inner cover 1. The rotating joint 34 allows the entire support assembly 3 to flexibly adjust its connection angle with the inner cover 1 during installation, thus adapting to minor tilts or positional deviations that may exist at the furnace opening of the continuous melting furnace, greatly simplifying the installation process and improving the adaptability of the equipment. The tightening cover 33 has a cap-like structure with internal threads. The tightening cover 33 can be screwed tightly onto the thread 35 at the end of the support rod 31. When the tightening cover 33 is tightened, it will press against the opening gap at the end of the support rod 31, causing the tube wall of the support rod 31 to contract radially inward, thereby tightly clamping the internal telescopic rod 32. Through this frictional locking method, the telescopic rod 32 is firmly locked in the preset telescopic position, preventing loosening or positional changes during equipment operation, and ensuring the stable installation of the inner cover of the continuous melting furnace opening. Other features, such as the heat sink 5 and anti-slip groove 4 on the outer cover 2, the limiting protrusion 38 on the support rod 31, and the through hole 36 on the rotating joint 34, are also reflected in this embodiment.

[0023] Based on the above embodiments, the present invention may also include the following preferred technical solutions: As a preferred embodiment, in order to enhance the heat dissipation effect of the outer cover, a plurality of heat dissipation fins 5 are fixedly connected to the outer wall of the outer cover 2. The heat dissipation fins 5 are multiple fins arranged at equal intervals along the axial direction of the outer cover 2. These fin-shaped heat dissipation fins 5 can significantly increase the surface area of ​​the outer cover 2, thereby improving its heat exchange efficiency with the surrounding air, helping to dissipate heat more quickly, reducing the overall temperature of the outer cover 2, preventing the cover from deforming under long-term high-temperature environment, and making the temperature distribution of the entire inner cover more reasonable.

[0024] As another preferred embodiment, in order to increase the friction with the furnace opening during installation and improve the stability of the equipment, the outer cover 2 is provided with an annular anti-slip groove 4 at the end facing the furnace opening. The anti-slip groove 4 can be designed in various forms such as wave-shaped, sawtooth-shaped or grid-shaped. Its structure can effectively increase the contact friction between the outer cover 2 and the edge of the furnace opening of the continuous melting furnace, thereby preventing the inner cover from sliding or displacing due to accidental collision or vibration during installation or operation, and ensuring the stable positioning of the inner cover.

[0025] In another preferred embodiment, to prevent damage to the components caused by over-tightening of the tightening cap 33, a limiting protrusion 38 is provided on the support rod 31 near the thread 35. The limiting protrusion 38 is annular or radial. When the tightening cap 33 is tightened to a preset position, its end face will contact the limiting protrusion 38, preventing the tightening cap 33 from being tightened further. This effectively avoids thread damage, excessive deformation of the rod body, or other potential mechanical damage caused by excessive force or misoperation by the operator, thus protecting the integrity and service life of the bracket assembly 3.

[0026] As another preferred embodiment, in order to facilitate the installation, adjustment and maintenance of the bracket assembly 3, the rotating joint 34 is provided with a through hole 36 for installation or positioning. The through hole 36 can be used to pass through bolts, pins or special tools. When installing or disassembling the bracket assembly 3, the through hole 36 can assist in positioning or provide a force application point. Especially when operating in a confined space, the through hole 36 can provide great convenience and simplify the maintenance and debugging process.

[0027] In another preferred embodiment, to further enhance the anti-rotation effect and fixing stability of the telescopic rod 32, the number of guide grooves 39 is at least two, and they are evenly distributed along the circumference of the support rod 31. The number of guide protrusions 37 matches the number of guide grooves 39. For example, two or three guide grooves 39 and their corresponding guide protrusions 37 can be provided. Increasing the number of guide grooves and guide protrusions and distributing them evenly can provide stronger torsional resistance and more uniform radial support, ensuring that the telescopic rod 32 maintains a high degree of axial movement and stability in any telescopic state, effectively preventing any form of rotation or sway.

[0028] In another preferred embodiment, to enhance the fixing strength and overall stability of the inner cover and the furnace opening, the number of support assemblies 3 is at least three, and they are evenly spaced along the circumference of the inner cover 1. For example, three or four support assemblies 3 can be provided, with each support assembly 3 evenly distributed between the inner and outer covers at an angle of 120 degrees or 90 degrees. The arrangement of multiple support assemblies 3 can provide multi-point support and fixation, connecting the inner and outer covers more firmly and evenly, effectively resisting various external forces or vibrations that may exist at the furnace opening, ensuring that the entire inner cover remains stable during long-term operation, and avoiding deformation or loosening caused by uneven local stress.

[0029] Working Principle: When installing and adjusting the inner cover of the continuous melting furnace opening, the operator first adjusts the length of the support assembly 3 according to the required furnace opening size. When length adjustment is needed, first loosen the tightening cap 33 to disengage it from the thread 35 of the support rod 31 or loosen the clamping. At this time, the telescopic rod 32 can slide axially inside the support rod 31. Due to the sliding engagement between the guide protrusion 37 on the outer wall of the telescopic rod 32 and the guide groove 39 on the inner wall of the support rod 31, the telescopic rod 32 is precisely guided during sliding, avoiding rotation during axial extension and contraction, and ensuring the stability and directionality of the relative position of the inner and outer covers. Through this telescopic method, the support assembly 3 can adapt to different length installation requirements.

[0030] After adjusting the length of the support assembly 3, the operator can adjust the angle of the inner cover 1 relative to the telescopic rod 32 by rotating the joint 34. The rotatable connection between the joint 34 and the telescopic rod 32, as well as the fixed connection between the joint 34 and the inner cover 1, allows the inner cover 1 to rotate within a certain range around the axis of the joint 34. This angle adjustment function enables the inner cover to be precisely aligned with the furnace opening of the continuous melting furnace, compensating for minor deviations that may exist due to the furnace opening or installation environment, and greatly improving the convenience and accuracy of installation.

[0031] After the inner cover 1 and outer cover 2 are properly positioned, the operator tightens the tightening cap 33. The tightening cap 33 is screwed to the support rod 31 via threads 35. As the tightening cap 33 is tightened, it presses against the pipe wall with an open slot at the end of the support rod 31. The presence of the open slot allows the end of the support rod 31 to retract radially inward, thereby tightly clamping the telescopic rod 32 housed inside. The strong friction generated by this radial clamping firmly locks the telescopic rod 32 in its current position, preventing axial sliding or rotation, thus achieving a stable fixation of the support assembly 3. At the same time, the limiting protrusion 38 on the support rod 31 prevents the tightening cap 33 from being overtightened, protecting the threads and rod from damage. The entire support assembly 3 consists of at least three units, evenly spaced along the circumference of the inner cover 1, providing multi-point support and balanced fixation for the inner and outer covers, further enhancing the overall structural stability.

[0032] When the continuous melting furnace is operating normally, the inner cover 1 is in direct contact with the furnace opening. Due to its structure and material properties, it provides excellent insulation, preventing the quartz tubes in the furnace opening area from bending and deforming due to uneven temperature. The flue gas generated at the furnace opening rises, and the annular gap formed between the outer cover 2 and the inner cover 1 becomes the exhaust channel for the flue gas. Driven by the airflow, the flue gas flows upward along this gap and is eventually drawn away, effectively preventing the flue gas from spreading in the surrounding environment and achieving an environmental protection effect. At the same time, the multiple heat dissipation fins 5 on the outer cover 2 help dissipate some heat, making the temperature distribution of the entire inner cover more reasonable and preventing deformation of the cover under prolonged high temperatures. The annular anti-slip groove 4 at the bottom of the outer cover 2 increases the friction with the furnace opening during installation, improving the stability of the equipment.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A furnace opening inner cover for a continuous melting furnace, comprising an inner cover (1) and an outer cover (2), wherein the outer cover (2) is coaxially sleeved outside the inner cover (1), characterized in that, It also includes a support assembly (3) for connecting the inner cover (1) and the outer cover (2), and the support assembly (3) includes: a hollow support rod (31), one end of which is fixedly connected to the inner wall of the outer cover (2) away from the inner cover (1), the outer wall of the support rod (31) facing the inner cover (1) is provided with threads (35), and the end has an opening slot that allows it to retract radially; a telescopic rod (32), one end of which is slidably received inside the support rod (31); the support rod ( The inner wall of the telescopic rod (31) is provided with a guide groove (39) extending along its axial direction, and the outer wall of the telescopic rod (32) is provided with a guide protrusion (37) that slides with the guide groove (39), a rotating joint (34) that is rotatably connected to the other end of the telescopic rod (32) away from the support rod (31), and the rotating joint (34) is fixedly connected to the outer wall of the inner cover (1); and a tightening cover (33) that is screwed tightly onto the thread (35) of the support rod (31) to compress the opening gap to lock the telescopic rod (32).

2. The inner cover of the continuous melting furnace opening according to claim 1, characterized in that, A plurality of heat sinks (5) are fixedly connected to the outer wall of the outer cover (2).

3. The inner cover of the continuous melting furnace opening according to claim 2, characterized in that, The heat sink (5) consists of multiple fins arranged at equal intervals along the axial direction of the outer cover (2).

4. The inner cover of the continuous melting furnace opening according to claim 1, characterized in that, The outer cover (2) has an annular anti-slip groove (4) at the end facing the furnace opening.

5. The inner cover of the continuous melting furnace opening according to claim 1, characterized in that, The support rod (31) is also provided with a limiting protrusion (38) near the thread (35).

6. The inner cover of the continuous melting furnace opening according to claim 1, characterized in that, The rotating joint (34) is provided with a through hole (36) for installation or positioning.

7. The inner cover of the continuous melting furnace opening according to claim 1, characterized in that, The number of guide grooves (39) is at least two and they are evenly distributed along the circumference of the support rod (31); the number of guide protrusions (37) matches the number of guide grooves (39).

8. The inner cover of the continuous melting furnace opening according to claim 1, characterized in that, The number of the support assembly (3) is at least three, and they are evenly spaced along the circumference of the inner cover (1).

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