Energy-saving double-layer kiln with different inner widths

Abstract

The utility model relates to the field of kiln, disclose a kind of energy-saving double-layer kiln of different inner width, comprising: kiln, inside is separated to form upper kiln cavity and lower kiln cavity along up-down direction, the width of the upper kiln cavity is greater than the width of the lower kiln cavity;Upper conveying device is set in the upper kiln cavity;Lower conveying device is set in the lower kiln cavity, the overall structure of the utility model is more stable, can prolong overall service life, and reduce kiln bearing requirement, it is favorable to reduce kiln manufacturing, maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of kilns and discloses an energy-saving double-layer kiln with different inner widths. Background Technology

[0002] Ceramic products are sintered at high temperatures in kilns. Currently, to increase ceramic production, some kilns are designed as double-layer roller kilns. This means that, within the same area, a double-layer kiln of the same length and width can double the output. However, existing double-layer roller kilns have the following main problems: Since the inner width of the upper and lower layers is the same, the kiln walls are vertical from bottom to top. The bricks at the bottom of the lower kiln need to bear the weight of the entire kiln wall. Generally, increasing the brick density and thickening the ribs of the roller-perforated bricks are used to prevent them from being crushed or deformed under high-temperature loads. However, thickening the roller perforation reduces the size of the holes, making it easy for the rollers to jam and wear against the ribs during operation, and even causing roller breakage. Therefore, there is an urgent need for a more structurally stable double-layer kiln. Utility Model Content

[0003] The purpose of this utility model is to provide an energy-saving double-layer kiln with different inner widths to solve one or more technical problems existing in the prior art, or at least provide a beneficial option or create conditions.

[0004] An energy-saving double-layer kiln with different inner widths according to a first aspect embodiment of the present invention includes: a kiln, the interior of which is divided into an upper kiln cavity and a lower kiln cavity in a vertical direction, the width of the upper kiln cavity being greater than the width of the lower kiln cavity; an upper conveying device disposed in the upper kiln cavity; and a lower conveying device disposed in the lower kiln cavity.

[0005] This technical solution has at least the following beneficial effects: The kiln interior forms a double-layered structure with a wider upper kiln cavity and a narrower lower kiln cavity. This allows for the staggering of the upper and lower kiln cavity sidewalls, thereby reducing the load on the lower kiln cavity sidewall and the need for thicker roller-hole brick reinforcement. This better ensures the smooth operation and service life of the rollers. Furthermore, it shortens the width of the partition structure between the upper and lower kiln cavities, enhancing the kiln's load-bearing capacity in the lower kiln cavity. Additionally, it provides greater flexibility in firing ceramic products, allowing for the selection of kiln cavities according to the width of the ceramic products. This results in a more stable overall structure, extends the overall service life, and reduces the kiln's load-bearing requirements, thus helping to reduce kiln manufacturing and maintenance costs.

[0006] According to some embodiments of the present invention, the present invention also includes an outer frame, wherein inwardly protruding support portions are formed on both sides of the bottom of the outer frame, and the kiln includes an upper side wall disposed on the top side of the two support portions, a partition layer connecting the two upper side walls, and a lower side wall disposed on the inner side of the two support portions. The upper kiln cavity is formed between the two upper side walls and the partition layer, and the lower kiln cavity is formed between the two lower side walls and the partition layer.

[0007] According to some embodiments of the present invention, the partition layer includes support beams and partition bricks arranged sequentially from bottom to top. The support beams are connected between the two lower side walls. Multiple support beams are arranged along the length direction of the lower kiln cavity. Multiple partition bricks are arranged along the width direction of the lower kiln cavity. Multiple partition bricks arranged along the width direction of the lower kiln cavity constitute a brick group. Multiple brick groups are arranged along the vertical direction.

[0008] According to some embodiments of the present invention, in two adjacent brick groups, the plurality of partition bricks in one brick group are staggered from the plurality of partition bricks in the other brick group.

[0009] According to some embodiments of this utility model, the adjacent two partition bricks are arranged in a dry-stacked pattern.

[0010] According to some embodiments of this utility model, heat-insulating bricks are respectively provided between the two sides of the uppermost brick group and the two upper side walls.

[0011] According to some embodiments of this utility model, the top sides of the two insulating bricks are respectively inclined downwards towards the center of the upper kiln cavity.

[0012] According to some embodiments of the present invention, the partition layer further includes a hollow plate disposed between the support beam and the partition brick. Multiple hollow plates are disposed along the width and length directions of the lower kiln cavity. Two adjacent partition hollow plates in the longitudinal direction are steppedly overlapped. Ceramic paper is disposed at the connection between two adjacent hollow plates in the longitudinal direction. Two adjacent hollow plates in the transverse direction are spliced ​​together by fasteners.

[0013] According to some embodiments of the present invention, the upper side wall includes a plurality of side wall bricks stacked vertically. In two adjacent brick groups, the brick joint formed by the partition brick and the side wall brick in one brick group is staggered from the brick joint formed by the partition brick and the side wall brick in the other brick group.

[0014] According to some embodiments of the present invention, an expansion joint is provided between any two adjacent partition bricks, and the expansion joint is filled with thermal insulation cotton.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] In the attached diagram: 110-Upper kiln cavity, 120-Lower kiln cavity, 130-Upper side wall, 131-Side wall brick, 140-Separation layer, 141-Support beam, 142-Partition brick, 143-Hollow board, 150-Lower side wall, 160-Insulation brick, 200-Upper conveying device, 300-Lower conveying device, 400-Outer frame, 410-Supporting part. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] Reference Figure 1 According to a first aspect of this utility model, an energy-saving double-layer kiln with different inner widths includes a kiln, an upper conveying device 200, and a lower conveying device 300. The interior of the kiln is divided vertically into an upper kiln cavity 110 and a lower kiln cavity 120, with the width of the upper kiln cavity 110 being greater than the width of the lower kiln cavity 120. The upper conveying device 200 is disposed within the upper kiln cavity 110, and the lower conveying device 300 is disposed within the lower kiln cavity 120. In practical applications, the upper conveying device 200 and the lower conveying device 300 can each be roller conveyors.

[0026] As described above, the kiln's interior features a double-layered structure with a wider upper kiln cavity 110 and a narrower lower kiln cavity 120. This design offsets the positions of the side walls of the upper kiln cavity 110 and the lower kiln cavity 120, thereby reducing the load on the lower kiln cavity 120 side wall, reducing the need for thicker roller brick reinforcement, better ensuring the smooth operation and service life of the rollers, and shortening the width of the partition structure between the upper kiln cavity 110 and the lower kiln cavity 120. This enhances the kiln's load-bearing capacity at the lower kiln cavity 120 position. Furthermore, it allows for greater flexibility in firing ceramic products, enabling the selection of kiln cavities according to the width of the ceramic products. This overall structure is more stable, extends the overall service life, and reduces the kiln's load-bearing requirements, thus helping to reduce kiln manufacturing and maintenance costs.

[0027] As a specific embodiment of forming a space that is wider at the top and narrower at the bottom inside the kiln, the present invention also includes an outer frame 400. The bottom two sides of the outer frame 400 have inwardly protruding support portions 410. The kiln includes an upper side wall 130 disposed on the top side of the two support portions 410, a partition layer 140 connecting the two upper side walls 130, and a lower side wall 150 disposed on the inner side of the two support portions 410. The upper kiln cavity 110 is formed between the two upper side walls 130 and the partition layer 140, and the lower kiln cavity 120 is formed between the two lower side walls 150 and the partition layer 140. The upper side wall 130 is built on the top side of the support part 410, and the partition layer 140 overlaps between the bottom of the two upper side walls 130 to form the bottom and top partition structure of the upper kiln cavity 110. The lower side wall 150 stands on the inner edge of the support part 410 and together with the partition layer 140, it encloses the lower kiln cavity 120. Due to the presence of the support part 410, the upper side wall 130 and the lower side wall 150 are staggered in the horizontal direction, so that the lower kiln wall does not directly bear the entire weight of the upper kiln wall. It is equivalent to using two single-layer kiln wall structures, which reduces the load-bearing requirements of the side walls. In this way, the upper load is directly transferred to the outer frame 400 through the support part 410, which helps to reduce the load on the lower kiln wall.

[0028] As a specific embodiment of the partition layer 140, the partition layer 140 includes support beams 141 and partition bricks 142 arranged sequentially from bottom to top. The support beams 141 are connected between the two lower side walls 150. Multiple support beams 141 are arranged along the length direction of the lower kiln cavity 120. Multiple partition bricks 142 are arranged along the width direction of the lower kiln cavity 120. Multiple partition bricks 142 arranged along the width direction of the lower kiln cavity 120 constitute a brick group. Multiple brick groups are arranged in the vertical direction. Because the width of the lower kiln cavity 120 is relatively small, the length of the support beam 141 connecting the two lower side walls 150 is shortened. This improves the bending resistance of the support beam 141 and solves the problems of the support beam 141 being too long and prone to bending and breaking. Multiple support beams 141 arranged along the length of the lower kiln cavity 120 form a support and load-bearing structure. Multiple brick sets are set on the top side of multiple support beams 141. During use, the number of brick sets can be adjusted according to the required interlayer thickness. Forming a suitable interlayer thickness helps to prevent temperature interference between upper and lower layers or "fire crossing" and other situations.

[0029] Furthermore, in two adjacent brick groups, the multiple partition bricks 142 in one brick group are staggered from the multiple partition bricks 142 in the other brick group. The partition bricks 142 in adjacent brick groups are laid using a staggered joint method. That is, the brick joints of the upper brick group and the lower brick group do not coincide in the vertical direction. For example, the staggered distance between the upper and lower partition bricks 142 is 1 / 3 to 1 / 2 of the brick length. This staggered joint construction method runs through the entire partition layer 140. The staggered joint construction forms a curved sealing structure, which helps to avoid the formation of a through heat flow channel, increases the resistance to heat escape, and helps to improve the thermal insulation performance. The staggered distribution of brick joints helps to improve the integrity and structural stability of the partition layer 140.

[0030] In use, the upper kiln chamber 110 or the lower kiln chamber 120 can be opened separately according to production needs, or the upper kiln chamber 110 and the lower kiln chamber 120 can be used to fire different varieties at different temperatures. To solve the problem of asynchronous firing of the interlayer and the wall due to temperature changes and thermal expansion and contraction, in this embodiment, the interlayer bricks 142 are arranged in a dry-stacking pattern between adjacent bricks. Dry-stacking means that no high-temperature adhesive is used when laying the interlayer bricks 142; the bricks are in direct contact and maintain stability through their own weight and the pressure from the upper layer. A certain expansion gap, such as 1 mm to 3 mm, is maintained between the bricks to compensate for thermal expansion at high temperatures. Dry-stacking allows the interlayer bricks 142 to expand freely when heated, which can alleviate brick cracking or crush damage caused by thermal stress, eliminates the need for adhesive, and simplifies the construction and maintenance process.

[0031] Because the outer frame 400 has poor temperature resistance, and the concave corners between the uppermost brick assembly and the upper sidewall 130 are relatively close to the outer frame 400, in order to reduce the impact of this location on the structural temperature resistance of the outer frame 400, in this embodiment, insulating bricks 160 are respectively installed between the uppermost brick assembly and the two upper sidewalls 130. The insulating bricks 160 can fill the weak insulation areas caused by structural misalignment, ensuring that the insulation layer thickness in these areas is consistent with other parts of the kiln bottom, thus playing a positive role in reducing heat transfer to the outer frame 400.

[0032] To reduce the resistance encountered by flue gas flowing to the insulating bricks 160, in this embodiment, the top sides of the two insulating bricks 160 are respectively inclined downwards towards the center of the upper kiln cavity 110. The inclined surface can guide the airflow in the kiln to flow smoothly, reduce eddies and local resistance, and help improve the temperature uniformity in the kiln. At the same time, the inclined insulating bricks 160 reduce their own weight, reduce heat absorption, and improve the reliability of long-term use.

[0033] As a further structural embodiment of the partition layer 140, the partition layer 140 also includes a hollow plate 143 disposed between the support beam 141 and the partition brick 142. Multiple hollow plates 143 are disposed along the width and length directions of the lower kiln cavity 120. Two adjacent partition hollow plates 143 in the longitudinal direction overlap in a stepped manner, and ceramic paper is disposed at the connection point of two adjacent hollow plates 143 in the longitudinal direction. Two adjacent hollow plates 143 in the transverse direction are spliced ​​together by fasteners. The multiple hollow plates 143 form a continuous plane, and their internal porous structure can further reduce the thermal conductivity of the partition layer, enhancing the heat insulation effect between the upper and lower kiln cavities 120. The use of multiple hollow plates 143 also helps to distribute the load transmitted by the rollers, reducing local pressure on the support beam 141. Adjacent hollow panels 143 can form a stable connection structure using fasteners. The fasteners can be clips set on one hollow panel 143. Correspondingly, adjacent hollow panels 143 are provided with grooves for the clips to be inserted and fitted. The adjacent hollow panels 143 are stepped and overlapped, which can slow down the leakage of hot air from the gaps between the hollow panels 143 and reduce the mutual influence between the upper and lower parts of the partition layer 140.

[0034] In some embodiments, the upper sidewall 130 includes a plurality of sidewall bricks 131 stacked vertically. In two adjacent brick groups, the brick joints formed by the partition brick 142 and the sidewall bricks 131 in one brick group are staggered from those formed by the partition brick 142 and the sidewall bricks 131 in the other brick group. At the junction of the brick group and the sidewall, the kiln walls on both sides and the partition layer 140 are laid in an alternating manner to enhance the integrity of the junction between the upper sidewall 130 and the partition layer 140. Furthermore, the staggered joints of the sidewall bricks 131 and the partition bricks 142 prevent the kiln wall from separating from the partition layer 140 and prevent heat leakage due to continuous joints.

[0035] Furthermore, an expansion joint is provided between any two adjacent partition bricks 142, and the expansion joint is filled with thermal insulation cotton. The space provided by the expansion joint can prevent the partition bricks 142 from squeezing each other when they expand and contract with heat, and filling the expansion joint with thermal insulation cotton can reduce the leakage of heat.

[0036] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An energy-saving double-layer kiln with different inner widths, characterized in that: include: The kiln has an upper kiln cavity (110) and a lower kiln cavity (120) divided in the vertical direction. The width of the upper kiln cavity (110) is greater than the width of the lower kiln cavity (120). An upper conveying device (200) is installed inside the upper kiln cavity (110); The lower conveying device (300) is installed inside the lower kiln cavity (120).

2. The energy-saving double-layer kiln with different inner widths according to claim 1, characterized in that: It also includes an outer frame (400), on both sides of the bottom of the outer frame (400) there are inwardly protruding support parts (410), the kiln includes an upper side wall (130) disposed on the top side of the two support parts (410), a partition layer (140) connecting the two upper side walls (130), and a lower side wall (150) disposed on the inner side of the two support parts (410). The upper kiln cavity (110) is formed between the two upper side walls (130) and the partition layer (140), and the lower kiln cavity (120) is formed between the two lower side walls (150) and the partition layer (140).

3. The energy-saving double-layer kiln with different inner widths according to claim 2, characterized in that: The partition layer (140) includes a support beam (141) and partition bricks (142) arranged sequentially from bottom to top. The support beam (141) is connected between the two lower side walls (150). Multiple support beams (141) are arranged along the length direction of the lower kiln cavity (120). Multiple partition bricks (142) are arranged along the width direction of the lower kiln cavity (120). Multiple partition bricks (142) arranged along the width direction of the lower kiln cavity (120) constitute a brick group. Multiple brick groups are arranged along the vertical direction.

4. The energy-saving double-layer kiln with different inner widths according to claim 3, characterized in that: In two adjacent brick groups, a plurality of the interlayer bricks (142) in one brick group are staggered from a plurality of the interlayer bricks (142) in the other brick group.

5. An energy-saving double-layer kiln with different inner widths according to claim 3, characterized in that: The two adjacent interlayer bricks (142) are arranged in a dry stack.

6. An energy-saving double-layer kiln with different inner widths according to claim 3, characterized in that: Insulating bricks (160) are respectively installed between the two sides of the uppermost brick group and the two upper side walls (130).

7. An energy-saving double-layer kiln with different inner widths according to claim 6, characterized in that: The top sides of the two insulating bricks (160) are respectively inclined downward toward the center of the upper kiln cavity (110).

8. An energy-saving double-layer kiln with different inner widths according to claim 3, characterized in that: The partition layer (140) also includes a hollow plate (143) disposed between the support beam (141) and the partition brick (142). Multiple hollow plates (143) are disposed along the width and length directions of the lower kiln cavity (120). Two adjacent partition hollow plates (143) are steppedly overlapped in the longitudinal direction. Ceramic paper is disposed at the connection between two adjacent hollow plates (143) in the longitudinal direction. Two adjacent hollow plates (143) in the transverse direction are spliced ​​together by fasteners.

9. An energy-saving double-layer kiln with different inner widths according to claim 3, characterized in that: The upper side wall (130) includes a plurality of side wall bricks (131) stacked vertically. In two adjacent brick groups, the brick joint formed by the partition brick (142) and the side wall brick (131) in one brick group is staggered from the brick joint formed by the partition brick (142) and the side wall brick (131) in the other brick group.

10. An energy-saving double-layer kiln with different inner widths according to claim 3, characterized in that: An expansion joint is provided between any two adjacent partition bricks (142), and the expansion joint is filled with thermal insulation cotton.

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