Roller kiln for even heating of porcelain blanks

Abstract

The utility model discloses a kind of roller hearth kiln of domestic porcelain body uniform heating, including roller hearth kiln body, the conveying roller of roller hearth kiln body is equipped with several auxiliary kiln furniture, the two sides inner wall of roller hearth kiln body is fixedly connected with auxiliary driving part jointly;Several The auxiliary kiln furniture includes counterweight base, and counterweight base is arranged on the conveying roller of roller hearth kiln body, the top of counterweight base is rotatably embedded with multiple gears, and adjacent two gears are engaged connection.In the utility model, through the meshing transmission of gear and rack, drive silicon carbide porcelain body placing support and body in conveying process continue to rotate slowly, combined with the excellent heat conductivity of silicon carbide rod, effectively solve the defect that each side is not heated evenly and the internal heating of deep cavity product is insufficient in background technology due to body static heating, realize the synchronous uniform heating of ceramic body radial and axial, significantly improve the quality of sintered product.

Description

Technical Field

[0001] This utility model relates to the field of roller kiln technology, and in particular to a roller kiln for uniform heating of daily-use porcelain blanks. Background Technology

[0002] Roller kilns are widely used continuous firing equipment in the modern ceramics industry. They utilize parallel rotating rollers to move ceramic blanks placed on the rollers at a uniform speed through the preheating temperature zone inside the kiln, thus achieving efficient and large-scale mass production. Roller kilns typically use burners arranged on both sides to heat the interior of the kiln. Heat is mainly transferred from the outside of the ceramic blank to its interior through radiation and convection. To improve heat utilization efficiency and firing uniformity, the industry commonly uses silicon carbide materials with excellent thermal conductivity to manufacture kiln furniture or rollers, aiming to assist in heating the blanks through heat conduction.

[0003] However, existing technologies of this kind still have significant limitations. First, the ceramic blanks are in a static conveying state within the kiln, resulting in a temperature difference between the side facing the heating source and the side facing away from the heating source. This can easily lead to color differences or deformation in the products, a problem particularly prominent for complex-shaped daily-use ceramics. Second, although silicon carbide kiln furniture can provide some heat conduction, its effect is mainly concentrated at the bottom or contact area of ​​the blanks. For deep-cavity ceramics (such as bottles and jars), heat still cannot penetrate effectively and evenly, relying on slow inward conduction from external heat sources. This carries the risk of "burnt on the outside and undercooked on the inside," hindering further improvements in product quality and optimization of the firing cycle.

[0004] To address this, we propose a roller kiln for uniformly heating daily-use porcelain blanks. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a roller kiln for uniform heating of daily-use porcelain blanks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a roller kiln for uniformly heating daily-use porcelain blanks, comprising a roller kiln body, wherein a plurality of auxiliary kiln furniture are mounted on the conveying rollers of the roller kiln body, and auxiliary driving components are fixedly connected to the inner walls on both sides of the roller kiln body.

[0007] Each of the auxiliary kiln furniture includes a counterweight base, and the counterweight base is mounted on the conveying roller of the roller kiln body. Multiple gears are rotatably embedded in the top of the counterweight base, and two adjacent gears are meshed and connected. A silicon carbide ceramic blank placement bracket is fixedly connected to the top of each of the multiple gears, and four silicon carbide rods are fixedly connected to the top of each of the multiple silicon carbide ceramic blank placement brackets.

[0008] Both of the auxiliary drive components include a guide rod, and a plurality of connecting seats are fixedly connected to one side of the outer surface of the guide rod. The connecting seats are fixedly connected to the inner wall of the roller kiln body, and the end of the guide rod is provided with a guide assembly.

[0009] A rack is fixedly connected to the top of each guide rod, and the rack is matched with a gear.

[0010] Furthermore, the bottom of the counterweight base is provided with anti-slip texture. The anti-slip texture can increase the friction at the bottom of the counterweight base, which is beneficial for the conveying rollers in the roller kiln body to transport the counterweight base.

[0011] Furthermore, each of the multiple silicon carbide ceramic blank placement supports includes a connecting base, and the connecting base is fixedly connected to the top of the gear. A silicon carbide column is fixedly connected to the top of the connecting base, and the silicon carbide column is fixedly connected to the bottom of four adjacent silicon carbide rods. The connecting base enables efficient transmission of the gear rotation power to the silicon carbide column.

[0012] Furthermore, multiple silicon carbide support rods are uniformly fixedly connected to the outer surface of the silicon carbide column, and the uniformly distributed silicon carbide support rods are beneficial for placing the ceramic blank.

[0013] Furthermore, the guide assembly includes a mounting groove, which is opened on one side of the outer surface of the guide rod and located at the feeding end of the roller kiln body. The inner side of the mounting groove is provided with multiple rollers, and the top and bottom of the multiple rollers are fixedly connected to support shafts. By using the freely rotatable rollers, the kiln furniture is guided and its position is corrected at the initial stage of feeding, so as to smoothly receive and guide the auxiliary kiln furniture forward.

[0014] Furthermore, the multiple support shafts respectively penetrate the inner top wall and inner bottom wall of the mounting groove and extend to the top and bottom of the guide rod, and the support shafts are rotatably connected to the guide rod. The arrangement of the support shafts facilitates the rotatable connection between the rollers and the mounting groove.

[0015] The beneficial effects of this utility model are:

[0016] In use, this invention drives the silicon carbide ceramic blank placement support and the blank to rotate slowly and continuously during the conveying process through the meshing transmission of gears and racks. Combined with the excellent thermal conductivity of the silicon carbide rod, it effectively solves the defects in the prior art caused by the static heating of the blank and the insufficient heating inside the deep cavity product. It realizes synchronous and uniform heating of the ceramic blank in the radial and axial directions, and significantly improves the firing quality. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments 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 these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the auxiliary kiln furniture of this utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the auxiliary drive component and the auxiliary kiln furniture of this utility model.

[0021] The attached figures are labeled as follows:

[0022] 1. Roller kiln body; 2. Auxiliary drive components; 21. Mounting groove; 22. Roller; 23. Guide rod; 24. Support shaft; 25. Connecting seat; 26. Rack; 3. Auxiliary kiln furniture; 31. Connecting base; 32. Counterweight base; 33. Gear; 34. Silicon carbide column; 35. Silicon carbide support rod; 36. Silicon carbide rod. Detailed Implementation

[0023] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-3 As shown, a roller kiln for uniformly heating daily-use porcelain blanks is disclosed, including a roller kiln body 1, a plurality of auxiliary kiln furniture 3 being mounted on the conveying rollers of the roller kiln body 1, and auxiliary drive components 2 being fixedly connected to the inner walls on both sides of the roller kiln body 1.

[0025] Several auxiliary kiln furniture items 3 each include a counterweight base 32. The counterweight base 32 is preferably made of heavy refractory material, such as high-temperature ceramic, possessing sufficient high-temperature structural strength and weight. The counterweight base 32 is mounted on the conveyor rollers of the roller kiln body 1. The bottom of the counterweight base 32 is provided with anti-slip texture. Multiple gears 33 are rotatably fitted into the top of the counterweight base 32. The gears 33 must be made of special high-temperature ceramic to withstand the high-temperature environment of the kiln firing zone and maintain their mechanical properties. The multiple gears 33 are rotatably fitted into the top of the counterweight base 32 through bushings, and adjacent gears 33 are meshed. Each of the multiple gears 33 has a silicon carbide ceramic blank placement bracket fixedly connected to its top. Each of the multiple silicon carbide ceramic blank placement brackets has four silicon carbide rods 36 fixedly connected to its top. Each of the multiple silicon carbide ceramic blank placement brackets includes a connecting base 31, and the connecting base 31 is fixedly connected to the top of the gear 33. The connecting base 31 and the gear 33 are integrally formed. A silicon carbide column 34 is fixedly connected to the top of the connecting base 31, and the silicon carbide column 34 is fixedly connected to the bottom of the four adjacent silicon carbide rods 36. Multiple silicon carbide support rods 35 are evenly fixedly connected to the outer surface of the silicon carbide column 34.

[0026] Both auxiliary drive components 2 include guide rods 23. The guide rods 23 are made of heat-resistant alloy steel and form the running track of the kiln furniture. Multiple connecting seats 25 are fixedly connected to one side of the outer surface of the guide rods 23, and the connecting seats 25 are fixedly connected to the inner wall of the roller kiln body 1. The end of the guide rods 23 is provided with a guide assembly. The guide assembly includes a mounting groove 21, which is opened on one side of the outer surface of the guide rods 23 and located at the feeding end of the roller kiln body 1. Multiple rollers 22 are provided on the inner side of the mounting groove 21. Support shafts 24 are fixedly connected to the top and bottom of the multiple rollers 22. The multiple support shafts 24 pass through the inner top wall and inner bottom wall of the mounting groove 21 respectively and extend to the top and bottom of the guide rods 23. The support shafts 24 are rotatably connected to the guide rods 23.

[0027] A rack 26 is fixedly connected to the top of a single guide rod 23, and the rack 26 matches the gear 33. The rack 26 is made of heat-resistant alloy steel.

[0028] Working principle: The operator inverts the ceramic blank to be fired (such as a cup or bottle) onto a stable support structure consisting of four silicon carbide support rods 35. The silicon carbide rods 36 and the silicon carbide support rods 35 work together to support the blank while efficiently transferring heat to it using the excellent high-temperature strength and thermal conductivity of silicon carbide material.

[0029] The auxiliary kiln furniture 3, which carries the green body, is placed at the inlet end of the roller kiln body 1. The counterweight base 32 at its bottom ensures the stability of the entire kiln furniture when it runs on the rollers, and the anti-slip texture at the bottom further prevents slippage.

[0030] As the auxiliary kiln furniture 3 is fed into the kiln along with the rotating conveyor rollers, it begins to enter the working area formed by the auxiliary drive unit 2. At the feed end of the kiln, the rollers 22 on the guide rod 23 first center and guide the auxiliary kiln furniture 3, ensuring that it can smoothly and accurately enter the predetermined track. As the kiln furniture continues to move forward, the gear 33 on its counterweight base 32 meshes with the rack 26 fixedly installed on the side wall of the kiln.

[0031] Since the rack 26 is stationary, while the auxiliary kiln furniture 3 carrying the gear 33 continues to move forward under the drive of the rollers, this relative motion forces the gear 33 to rotate along the rack 26. The rotation of the gear 33, through the connection between the base 31 and the silicon carbide column 34, is directly converted into the rotation of the entire silicon carbide ceramic blank placement support. Thus, the ceramic blank placed on the support begins to rotate slowly and uniformly. This process continues throughout the entire heating zone of the kiln.

[0032] During the rotation of the ceramic body, each of its sides (front, back, left, and right) periodically and alternately faces the kiln's sidewall heating source (such as a burner). This completely avoids the problem of the ceramic body always being overheated on the side facing the heat source and underheated on the side facing away from the heat source, which is a common issue in traditional static firing. At the same time, the silicon carbide support rods 35 and 36, made of silicon carbide, are also heated to a high temperature. Through heat conduction and heat radiation, they continuously and evenly heat the ceramic body from the inside, solving the problem of insufficient heating inside deep-cavity products.

[0033] The dual effect of "rotation + internal heat conduction" enables the ceramic blank to be fully and uniformly heated in both the radial (around the periphery) and axial (inner and outer) directions.

[0034] When the auxiliary kiln furniture 3, carrying the fired ceramic products, reaches the end of the kiln, the gear 33 at its bottom disengages from the rack 26. The ceramic products stop rotating but continue to move with the conveyor rollers and are eventually sent out of the kiln cooling zone.

[0035] Empty auxiliary kiln furniture 3 can be recycled after cooling and reused for the next firing.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A roller kiln for uniformly heating daily-use porcelain blanks, comprising a roller kiln body (1), characterized in that: Several auxiliary kiln furniture (3) are mounted on the conveying rollers of the roller kiln body (1), and auxiliary driving components (2) are fixedly connected to the inner walls of both sides of the roller kiln body (1). Each of the auxiliary kiln furniture (3) includes a counterweight base (32), and the counterweight base (32) is mounted on the conveying roller of the roller kiln body (1). The top of the counterweight base (32) is rotatably fitted with multiple gears (33), and two adjacent gears (33) are meshed together. The top of each of the multiple gears (33) is fixedly connected with a silicon carbide ceramic blank placement bracket, and the top of each of the multiple silicon carbide ceramic blank placement brackets is fixedly connected with four silicon carbide rods (36). Both of the auxiliary drive components (2) include a guide rod (23). A plurality of connecting seats (25) are fixedly connected to one side of the outer surface of the guide rod (23), and the connecting seats (25) are fixedly connected to the inner wall of the roller kiln body (1). The end of the guide rod (23) is provided with a guide assembly. A rack (26) is fixedly connected to the top of each guide rod (23), and the rack (26) is matched with a gear (33).

2. The roller kiln for uniformly heating daily-use porcelain blanks according to claim 1, characterized in that: The bottom of the counterweight base (32) is provided with anti-slip texture.

3. The roller kiln for uniformly heating daily-use porcelain blanks according to claim 1, characterized in that: Each of the aforementioned silicon carbide ceramic blank placement supports includes a connecting base (31), and the connecting base (31) is fixedly connected to the top of the gear (33). A silicon carbide column (34) is fixedly connected to the top of the connecting base (31), and the silicon carbide column (34) is fixedly connected to the bottom of four adjacent silicon carbide rods (36).

4. The roller kiln for uniformly heating daily-use porcelain blanks according to claim 3, characterized in that: Multiple silicon carbide support rods (35) are uniformly fixedly connected to the outer surface of the silicon carbide column (34).

5. The roller kiln for uniformly heating daily-use porcelain blanks according to claim 1, characterized in that: The guide assembly includes a mounting groove (21), which is opened on one side of the outer surface of the guide rod (23) and located at the feeding end of the roller kiln body (1). The inner side of the mounting groove (21) is provided with multiple rollers (22), and the top and bottom of the multiple rollers (22) are fixedly connected to a support shaft (24).

6. The roller kiln for uniformly heating daily-use porcelain blanks according to claim 5, characterized in that: The multiple support shafts (24) pass through the inner top wall and inner bottom wall of the mounting groove (21) and extend to the top and bottom of the guide rod (23), and the support shafts (24) are rotatably connected to the guide rod (23).

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