Rotary kiln

Abstract

The utility model relates to the field of rotary kiln structures, and discloses a rotary kiln which comprises a heating pipe section, a cooling pipe section and a heat dissipation corrugated pipe. Connecting flanges are arranged at the two opposite ends of the heat dissipation corrugated pipe, one connecting flange is connected with the heating pipe section in a sealed mode, and the other connecting flange is connected with the cooling pipe section in a sealed mode. A plurality of corrugated expansion joints which are distributed at equal intervals are arranged on the periphery of the heat dissipation corrugated pipe, every two adjacent corrugated expansion joints are in smooth transition, and an annular arc-shaped groove is formed in the inner side of each corrugated expansion joint; the annular arc-shaped groove is perpendicular to the center line of the heat dissipation corrugated pipe. According to the utility model, the rotary kiln and the corrugated telescopic pipe form a good buffer structure, so that the connection reliability of the heating pipe section and the cooling pipe section is effectively improved, the influence of thermal expansion and cold contraction effects is reduced, and the safety of equipment is higher.

Description

A rotary kiln Technical Field

[0001] This utility model relates to the field of rotary kiln structure, and more particularly to a rotary kiln. Background Technology

[0002] A rotary kiln is a type of production equipment that is widely used in many industrial sectors to process materials.

[0003] Current rotary kilns consist of interconnected heating and cooling sections. Material is gradually conveyed from the heating section to the cooling section. However, because the heating section is directly connected to the cooling section, the temperature of the end of the cooling section closest to the heating section is higher. The thermal expansion and contraction effect at the connection point makes the connection between the heating and cooling sections prone to deformation, which can easily lead to damage and affect the safety of the equipment.

[0004] Therefore, it is necessary to design a rotary kiln to improve the connection reliability of the heating and cooling pipe sections, reduce the impact of thermal expansion and contraction on the connection parts, and improve equipment safety.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Summary of the Invention

[0006] This invention provides a rotary kiln that improves the connection reliability of heating and cooling pipe sections, reduces the impact of thermal expansion and contraction on the connection parts, and enhances equipment safety.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A rotary kiln includes a heating section, a cooling section, and a heat dissipation corrugated pipe;

[0009] The heat dissipation corrugated pipe is provided with connecting flanges at both opposite ends, one of the connecting flanges being sealed to the heating pipe section and the other connecting flange being sealed to the cooling pipe section.

[0010] The outer periphery of the heat dissipation corrugated pipe is provided with a number of equally spaced corrugated expansion joints, and each of the corrugated expansion joints is provided with an annular arc-shaped groove on its inner side.

[0011] The annular arc-shaped groove is perpendicular to the center line of the heat dissipation bellows.

[0012] Optionally, the heat dissipation corrugated pipe includes an inner heat-conducting metal layer, a middle reinforcing metal layer, and an outer heat-conducting metal layer;

[0013] The intermediate reinforcing metal layer is disposed outside the centerline of the inner heat-conducting metal layer away from the centerline of the heat dissipation bellows, and the outer heat-conducting metal layer is disposed outside the intermediate reinforcing metal layer away from the centerline of the heat dissipation bellows.

[0014] Optionally, the inner thermally conductive metal layer is a titanium alloy layer, the middle reinforcing metal layer is a stainless steel layer, and the outer thermally conductive metal layer is a copper alloy layer.

[0015] Optionally, each of the corrugated expansion joints is connected to at least one annular heat sink, the inner hole of which fits against the outer peripheral surface of the corrugated expansion joint.

[0016] Optionally, the annular heat sink is welded and fixed to the corrugated expansion joint.

[0017] Optionally, the annular heat sink is perpendicular to the centerline of the heat dissipation bellows.

[0018] Optionally, each of the corrugated expansion joints is equipped with two parallel annular heat sinks, the inner surface of the annular heat sinks is in contact with the corrugated expansion joint, and an annular retainer is installed between two adjacent annular heat sinks, with one annular heat sink connected to each of the opposite sides of the annular retainer.

[0019] Optionally, the rotary kiln also includes a cooling fan installed beside the heat dissipation bellows, the cooling fan being used to blow cooling airflow onto the heat dissipation bellows.

[0020] Optionally, the contact surface of the annular heat sink with the corrugated expansion joint is an arc-shaped surface.

[0021] Optionally, a heating cover is provided on the outer periphery of the heating pipe section, and a cooling cover is provided on the outer periphery of the cooling pipe section.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The rotary kiln provided by this utility model uses a heat dissipation corrugated pipe as the connection part. The connecting flanges at both ends of the heat dissipation corrugated pipe connect the heating pipe section and the cooling pipe section respectively. The heat dissipation corrugated pipe is provided with equidistantly distributed corrugated expansion joints, with a smooth transition between adjacent corrugated expansion joints. The corresponding corrugated expansion joints are provided with an annular arc-shaped groove on the inner side, so that the pipe wall of the heat dissipation corrugated pipe extends in an S-shape. This allows the heat dissipation corrugated pipe to maintain an appropriate distance between adjacent corrugated expansion joints after thermal expansion and contraction without affecting the actual connection effect. The corrugated expansion pipe constitutes a good buffer structure, effectively improving the connection reliability of the heating pipe section and the cooling pipe section, reducing the impact of thermal expansion and contraction, and making the equipment safer.

[0024] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0025] 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 these drawings without creative effort.

[0026] Figure 1 is a schematic diagram of the installation structure of the rotary kiln provided in an embodiment of the present invention;

[0027] Figure 2 is a three-dimensional schematic diagram of the heat dissipation corrugated pipe provided in an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the layered structure of the heat dissipation corrugated pipe provided in the embodiment of this utility model;

[0029] Figure 4 is a front view schematic diagram of the heat dissipation bellows provided in the embodiment of this utility model;

[0030] Figure 5 is a schematic diagram of the AA cross-sectional structure of the heat dissipation bellows in Figure 4;

[0031] Figure 6 is a cross-sectional structural diagram of another heat dissipation corrugated pipe provided in an embodiment of this utility model.

[0032] Reference numerals: 1. Heating pipe section; 2. Cooling pipe section; 3. Heat dissipation corrugated pipe; 31. Corrugated expansion joint; 32. Annular arc groove; 301. Inner heat-conducting metal layer; 302. Middle reinforcing metal layer; 303. Outer heat-conducting metal layer; 3001. Annular heat sink; 3002. Annular retainer; 4. Connecting flange. Detailed Implementation

[0033] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0034] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0035] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0036] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0037] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0038] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0039] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0040] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] In view of the aforementioned defects in existing rotary kilns, the applicant, based on years of rich practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, actively conducted research and innovation in order to create a technology that could solve the defects in the existing technology and make the rotary kiln more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value was finally created.

[0043] Please refer to Figures 1 to 5. This utility model embodiment provides a rotary kiln, including a heating pipe section 1, a cooling pipe section 2, and a heat dissipation corrugated pipe 3.

[0044] The heat dissipation corrugated pipe 3 is provided with connecting flanges 4 at both ends. One connecting flange 4 at the left end is sealed to the heating pipe section 1, and the other connecting flange 4 at the right end is sealed to the cooling pipe section 2, so that the material in the heating pipe section 1 can gradually move to the cooling pipe section 2 under the purging of inert gas.

[0045] In this embodiment, a plurality of equally spaced corrugated expansion joints 31 are provided on the outer periphery of the heat dissipation corrugated pipe 3. The transition between adjacent corrugated expansion joints 31 is smooth, and each corrugated expansion joint 31 has an annular arc-shaped groove 32 on its inner side; the annular arc-shaped groove 32 is perpendicular to the centerline of the heat dissipation corrugated pipe 3. The annular arc-shaped groove 32 in the corrugated expansion joint 31 and the smooth transition between adjacent corrugated expansion joints 31 cause the pipe wall of the heat dissipation corrugated pipe to extend in an S-shape, improving the heat dissipation corrugated pipe 3's ability to cope with thermal expansion and contraction. After thermal expansion and contraction, the distance between adjacent corrugated expansion joints 31 increases or decreases accordingly without affecting the actual connection effect. The corrugated expansion pipe 3 constitutes a good buffer structure, effectively improving the connection reliability of the heating pipe section 1 and the cooling pipe section 2, reducing the impact of thermal expansion and contraction, and making the equipment safer.

[0046] In addition, the setting of the annular arc groove 32 increases the heat dissipation area and heat dissipation effect, allowing more heat to be dissipated to the outside, thereby reducing the heat transferred to the cooling pipe section 2, reducing the possibility of the cooling pipe section 2 being damaged by high temperature, and allowing the material to be cooled faster in the cooling pipe section 2.

[0047] Optionally, the heat dissipation bellows 3 includes an inner heat-conducting metal layer 301, a middle reinforcing metal layer 302, and an outer heat-conducting metal layer 303; the middle reinforcing metal layer 302 is disposed outside the inner heat-conducting metal layer 301 away from the center line of the heat dissipation bellows 3, and the outer heat-conducting metal layer 303 is disposed outside the middle reinforcing metal layer 302 away from the center line of the heat dissipation bellows 3.

[0048] Specifically, the intermediate reinforcing metal layer 302 plays a role in improving structural stability, while the inner heat-conducting metal layer 301 is used to efficiently transfer heat to the intermediate reinforcing metal layer 302, and then the intermediate reinforcing metal layer 302 transfers heat to itself and dissipates the heat to the outside.

[0049] In this embodiment, the inner heat-conducting metal layer 301 is a titanium alloy layer. The titanium alloy layer has high strength, good corrosion resistance, and high heat resistance, making it very suitable for the processing environment in actual production. The middle reinforcing metal layer 302 is a stainless steel layer, and the outer heat-conducting metal layer 303 is a copper alloy layer.

[0050] Optionally, each corrugated expansion joint 31 is connected to at least one annular heat sink 3001, the inner hole of which fits against the outer peripheral surface of the corrugated expansion joint 31. Heat on the corrugated expansion joint 31 can be transferred to the annular heat sink 3001 and then dissipated to the outside through the annular heat sink 3001, thereby improving heat dissipation efficiency.

[0051] Optionally, the annular heat sink 3001 is welded and fixed to the corrugated expansion joint 31.

[0052] In this embodiment, the annular heat sink 3001 is perpendicular to the center line of the heat dissipation bellows 3.

[0053] Optionally, as shown in Figure 6, each corrugated expansion joint 31 is equipped with two parallel annular heat sinks 3001. The inner surface of the annular heat sink 3001 is in contact with the corrugated expansion joint 31, and an annular retainer 3002 is installed between adjacent annular heat sinks 3001. One annular heat sink 3001 is connected to each opposite side of the annular retainer 3002. Specifically, the annular retainer 3002 is used to maintain the position of the two annular heat sinks 3001. The inner end of the annular heat sink 3001 abuts against the corrugated expansion joint 31, and the middle part is limited by the annular retainer 3002, thus making the two annular heat sinks 3001 parallel to each other. It should also be noted that the two parallel annular heat sinks 3001 effectively improve the heat transfer and heat dissipation effect of the heat dissipation corrugated pipe 3.

[0054] Optionally, the rotary kiln also includes a cooling fan installed beside the heat dissipation bellows 3, which blows cooling airflow onto the heat dissipation bellows 3. Specifically, the cooling fan, in conjunction with the annular heat sink 3001, further enhances the heat dissipation effect of the heat dissipation bellows 3.

[0055] Optionally, the contact surface of the annular heat sink 3001 with the corrugated expansion joint 31 is an arc-shaped surface.

[0056] Optionally, a heating cover is provided on the outer periphery of the heating pipe section 1, and a cooling cover is provided on the outer periphery of the cooling pipe section 2.

[0057] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A rotary kiln, characterized in that, It includes a heating pipe section (1), a cooling pipe section (2), and a heat dissipation corrugated pipe (3); both ends of the heat dissipation corrugated pipe (3) are provided with connecting flanges (4), one of the connecting flanges (4) is sealed to the heating pipe section (1), and the other connecting flange (4) is sealed to the cooling pipe section (2); a number of equally spaced corrugated expansion joints (31) are provided on the outer periphery of the heat dissipation corrugated pipe (3), and there is a smooth transition between two adjacent corrugated expansion joints (31), and an annular arc groove (32) is provided on the inner side of each corrugated expansion joint (31); the annular arc groove (32) is perpendicular to the center line of the heat dissipation corrugated pipe (3).

2. The rotary kiln according to claim 1, characterized in that, The heat dissipation corrugated pipe (3) includes an inner heat-conducting metal layer (301), a middle reinforcing metal layer (302), and an outer heat-conducting metal layer (303); the middle reinforcing metal layer (302) is disposed outside the center line of the inner heat-conducting metal layer (301) away from the center line of the heat dissipation corrugated pipe (3), and the outer heat-conducting metal layer (303) is disposed outside the center line of the middle reinforcing metal layer (302) away from the center line of the heat dissipation corrugated pipe (3).

3. The rotary kiln according to claim 2, characterized in that, The inner heat-conducting metal layer (301) is a titanium alloy layer, the middle reinforcing metal layer (302) is a stainless steel layer, and the outer heat-conducting metal layer (303) is a copper alloy layer.

4. The rotary kiln according to claim 1, characterized in that, Each of the corrugated expansion joints (31) is connected to at least one annular heat sink (3001), the inner hole of which fits against the outer circumferential surface of the corrugated expansion joint (31).

5. The rotary kiln according to claim 4, characterized in that, The annular heat sink (3001) is welded and fixed to the corrugated expansion joint (31).

6. The rotary kiln according to claim 4, characterized in that, The annular heat sink (3001) is perpendicular to the center line of the heat dissipation bellows (3).

7. The rotary kiln according to claim 1, characterized in that, Each of the corrugated expansion joints (31) is equipped with two parallel annular heat sinks (3001). The inner surface of the annular heat sinks (3001) is in contact with the corrugated expansion joint (31), and an annular retainer (3002) is installed between two adjacent annular heat sinks (3001). One annular heat sink (3001) is connected to each of the opposite sides of the annular retainer (3002).

8. The rotary kiln according to claim 7, characterized in that, It also includes a cooling fan installed beside the heat dissipation corrugated pipe (3), the cooling fan being used to blow cooling airflow onto the heat dissipation corrugated pipe (3).

9. The rotary kiln according to claim 7, characterized in that, The contact surface between the annular heat sink (3001) and the corrugated expansion joint (31) is an arc-shaped surface.

10. The rotary kiln according to claim 1, characterized in that, The heating pipe section (1) is provided with a heating cover on its outer periphery, and the cooling pipe section (2) is provided with a cooling cover on its outer periphery.

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