Rotary kiln with uniform heating function

Abstract

The utility model relates to the field of rotary kiln structures, and discloses a rotary kiln capable of heating uniformly, which comprises a rotary cylinder capable of rotating around the center line of the rotary cylinder; the heating assembly comprises a hollowed-out supporting frame surrounding the rotary cylinder, a first heating wire spirally wound on the side, close to the rotary cylinder, of the hollowed-out supporting frame, and a second heating wire spirally wound on the side, away from the rotary cylinder, of the hollowed-out supporting frame; the spiral winding direction of the first heating wire is opposite to that of the second heating wire; and the heat preservation shell is arranged on the periphery of the heating assembly in a covering mode. According to the rotary kiln with the uniform heating function, the rotary barrel can be heated more uniformly.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary kiln structure field especially relates to a rotary kiln that even heating. BACKGROUND

[0002] Rotary kiln is important thermal equipment in industrial production.

[0003] In actual production process, need to use rotary kiln to dry processing to part raw material, the existing rotary kiln, generally through electric heating wire to the rotary cylinder that has raw material heating, electric heating wire generally has two, and two electric heating wires are arranged rotary cylinder opposite two sides respectively, but through two electric heating wires heating rotary cylinder, easily make rotary cylinder uneven heating, thereby influence material drying evenness.

[0004] Therefore, it is necessary to design a rotary kiln that even heating, can make rotary cylinder more uniform heating.

[0005] The above information is given as background information only to assist an understanding of the present disclosure and should not be taken as an acknowledgement or admission that any of the above information was known at the time of filing or prior to the filing date of this disclosure. SUMMARY

[0006] The utility model provides a rotary kiln that even heating, can make rotary cylinder more uniform heating.

[0007] To achieve the above object, the utility model provides following technical scheme:

[0008] A rotary kiln that even heating, include:

[0009] Rotary cylinder, can revolve around the center line of rotary cylinder;

[0010] Heating assembly, including hollow support frame around rotary cylinder, spiral around first heating wire that hollow support frame is close to rotary cylinder one side and spiral around second heating wire that hollow support frame is away from rotary cylinder one side, and the spiral around direction of first heating wire is opposite with the spiral around direction of second heating wire;

[0011] Heat preservation shell, cover is established in the outer periphery of heating assembly.

[0012] Optionally, the rotary kiln that even heating further includes first rotation drive motor;

[0013] The hollow support frame around the center line of rotary cylinder can be rotatably installed on the heat preservation shell;One end of the hollow support frame is provided with a first transmission gear, and the driving shaft of the first rotation drive motor is drivingly connected with a second transmission gear, and the first transmission gear is meshingly connected with the second transmission gear.

[0014] Optionally, the other end of the hollow support frame is provided with a conductive slip ring, and the conductive slip ring is connected with the first heating wire and the second heating wire respectively to supply power to the first heating wire and the second heating wire.

[0015] Optionally, the rotary kiln with uniform heating further comprises a second rotary driving motor;

[0016] The third transmission gear is arranged on the rotary cylinder body, a fourth transmission gear is drivingly connected with a driving shaft of the second rotary driving motor, and the third transmission gear meshes with the fourth transmission gear.

[0017] Optionally, the first heating wire is spirally arranged clockwise around the center line of the rotary cylinder body, and the second heating wire is spirally arranged counterclockwise around the center line of the rotary cylinder body.

[0018] Optionally, the rotary kiln with uniform heating further comprises a cooling device sleeved on the rotary cylinder body, and the cooling device is arranged in a spaced manner with the heat preservation shell.

[0019] Optionally, the heat preservation shell comprises a shell body and a heat preservation layer arranged on the inner side of the shell body.

[0020] Optionally, the rotary cylinder body is provided with a feeding port, and the feeding port is provided with a sealable sealing cover.

[0021] Optionally, the winding spacing of the first heating wire is equal to the winding spacing of the second heating wire, and the diameter of the first heating wire is equal to the diameter of the second heating wire.

[0022] Optionally, the hollow support frame comprises at least two annular rings and 16 transverse support columns.

[0023] The annular ring surrounds the rotary cylinder body, all the transverse support columns are arranged in a circumferential array around the annular ring, and the annular ring and the transverse support columns are fixedly connected.

[0024] Compared with the prior art, the rotary kiln with uniform heating has the following beneficial effects:

[0025] The rotary kiln with uniform heating provided by the utility model is provided with the heating assembly with an optimized structure between the heat preservation shell and the rotary cylinder body, the first heating wire and the second heating wire are both arranged on the hollow support frame, and the spiral arrangement directions of the first heating wire and the second heating wire are opposite, that is, if the first heating wire is arranged clockwise, the second heating wire is arranged counterclockwise, so that the first heating wire cooperates with the second heating wire to better and uniformly heat the rotary cylinder body, and the heating uniformity of the rotary cylinder body is improved.

[0026] The present application has other characteristics and advantages, which will be apparent from the accompanying drawings and the following detailed description, or will be set forth in the accompanying drawings and the following detailed description, which together serve to explain the specific principles of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0028] Figure 1 is a schematic diagram of the mounting structure of the rotary kiln provided by the embodiment of the present application;

[0029] Figure 2 is Figure 1 is a partial enlarged schematic diagram of the rotary kiln in the embodiment;

[0030] Figure 3 is a schematic diagram of the relative positions of the first heating wire and the second heating wire provided by the embodiment of the present application;

[0031] Figure 4 is Figure 3 is a schematic diagram of the A-A cross-sectional structure of the structure in the embodiment.

[0032] The drawings show that: 1, rotary cylinder; 2, heating assembly; 21, hollow support frame; 201, annular ring; 202, transverse support column; 22, first heating wire; 23, second heating wire; 3, heat preservation shell; 31, shell; 32, heat preservation layer; 4, first rotary drive motor; 41, first transmission gear; 42, second transmission gear; 43, conductive slip ring; 5, second rotary drive motor; 51, third transmission gear; 52, fourth transmission gear; 6, cooling device; 7, sealing cover. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings and the following detailed description, or will be set forth in the accompanying drawings and the following detailed description, which together serve to explain the specific principles of the present application.

[0034] The term "embodiment" is mentioned herein means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0035] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0036] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " herein generally represents that the associated objects before and after are a "or" logical relationship.

[0037] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary, or order relationship between the entities or operations.

[0038] In the present application, without more limitation, the "includes", "contains", "has" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent to such process, method or product.

[0039] As the same as the understanding in the "Guidelines for Examination", in the present application, the expressions "greater than", "less than", "exceed" and the like are understood as not including the number; the expressions "above", "below", "within" and the like are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly limited.

[0040] In the description of the embodiments of the present application, the spatial relative expressions such as "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0041] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", and the like should be understood broadly. For example, the "connection" can be fixed connection, or detachable connection, or integral setting; it can be mechanical connection, or electrical connection, or communication connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] In view of the defects of the existing rotary kiln, the applicant, based on many years of rich practical experience and professional knowledge in designing and manufacturing such products, and with the use of theory, actively researches and innovates, in the hope of creating a technology that can solve the defects in the prior art, so as to effectively improve the practicality. After continuous research, design, and repeated trial of samples and improvement, the present utility model is finally created, which has practical value.

[0043] Please refer to Figures 1 to 4 The embodiment of the present application provides a rotary kiln with uniform heating, which comprises a rotary cylinder 1, a heating assembly 2 and a heat preservation shell 3.

[0044] The rotary cylinder 1 can rotate around the center line of the rotary cylinder 1; the heating assembly 2 comprises a hollow support frame 21 surrounding the rotary cylinder 1, a first heating wire 22 spirally wound on one side of the hollow support frame 21 close to the rotary cylinder 1, and a second heating wire 23 spirally wound on the other side of the hollow support frame 21 away from the rotary cylinder 1, and the spiral winding direction of the first heating wire 22 is opposite to that of the second heating wire 23; the heat preservation shell 3 is arranged on the outer periphery of the heating assembly 2.

[0045] Firstly, the annular heating space is formed between the rotary cylinder 1 and the heat preservation shell 3, and the heating assembly 2 is installed in the heating space to heat the rotary cylinder 1, and the heating space can reduce the heat energy outflow, so that the heating assembly 2 can better heat the rotary cylinder 1; secondly, the spiral winding direction of the first heating wire 22 is opposite to the spiral winding direction of the second heating wire 23, and the first heating wire 22 and the second heating wire 23 can simultaneously heat the entire outer circumferential surface of the rotary cylinder 1, so that the heating uniformity of the rotary cylinder 1 can be effectively improved.

[0046] It also needs to be particularly pointed out that, in the heating process, the rotary cylinder 1 rotates relative to the heating assembly 2, which can also effectively avoid the occurrence of local hot spots and effectively improve the heating uniformity.

[0047] Optionally, the rotary kiln with uniform heating also comprises a first rotary driving motor 4; the hollow support frame 21 is rotatably installed on the heat preservation shell 3 around the center line of the rotary cylinder 1; one end of the hollow support frame 21 is provided with a first transmission gear 41, and the driving shaft of the first rotary driving motor 4 is transmissionally connected with a second transmission gear 42, and the first transmission gear 41 is meshingly connected with the second transmission gear 42.

[0048] In the embodiment, the first rotary driving motor 4 can drive the hollow support frame 21 to rotate. It needs to be noted that, in the actual production process, the rotation speed of the rotary cylinder 1 cannot be too fast, at this time, the rotation speed of the hollow support frame 21 can be appropriately adjusted, so that the heating uniformity of the heating assembly 2 is improved to a certain extent. Preferably, the rotation direction of the hollow support frame 21 is opposite to the rotation direction of the rotary cylinder 1.

[0049] Optionally, the other end of the hollow support frame 21 is provided with a conductive slip ring 43, and the conductive slip ring 43 is connected with the first heating wire 22 and the second heating wire 23 respectively to supply power to the first heating wire 22 and the second heating wire 23. Specifically, the power supply is realized through the conductive slip ring 43 in the embodiment, so that the first heating wire 22 and the second heating wire 23 can normally heat during the rotation of the hollow support frame 21. It also needs to be noted that the power supply to the heating wire through the conductive slip ring 43 is prior art, so the structure thereof will not be described in detail. The conductive slip ring 43 in the embodiment is provided with a first conductive ring and a second conductive ring, the first conductive ring is used to supply power to the first heating wire 22, and the second conductive ring is used to supply power to the second heating wire 23.

[0050] Optionally, the rotary kiln with uniform heating also comprises a second rotary driving motor 5; a third transmission gear 51 is installed on the rotary cylinder 1, the driving shaft of the second rotary driving motor 5 is transmissionally connected with a fourth transmission gear 52, and the third transmission gear 51 meshes with the fourth transmission gear 52. Specifically, the second rotary driving motor 5 can drive the rotary cylinder 1 to rotate.

[0051] In one specific embodiment, the first heating wire 22 is spirally arranged clockwise around the center line of the rotary cylinder 1, and the second heating wire 23 is spirally arranged counterclockwise around the center line of the rotary cylinder 1.

[0052] Optionally, the rotary kiln with uniform heating further comprises a cooling device 6 sleeved on the rotary cylinder 1, and the cooling device 6 is arranged in a spaced manner with the heat preservation shell 3. Specifically, the cooling device 6 is used to cool the rotary cylinder 1 at the rear section, so that the heated raw materials are gradually cooled to a suitable temperature. It should be noted that a transition section is arranged between the front section and the rear section of the rotary cylinder 1 to avoid excessively high temperature of the rear section.

[0053] Optionally, the heat preservation shell 3 comprises a shell body 31 and a heat preservation layer 32 mounted on the inner side of the shell body 31. Specifically, the heat preservation layer 32 is arranged to effectively avoid excessively high temperature of the shell body 31.

[0054] Optionally, the rotary cylinder 1 is provided with a feeding port, and the feeding port is provided with a sealable sealing cover 7.

[0055] Optionally, the winding spacing of the first heating wire 22 is equal to the winding spacing of the second heating wire 23, and the diameter of the first heating wire 22 is equal to the diameter of the second heating wire 23.

[0056] Optionally, the hollow support frame 21 comprises at least two annular rings 201 and sixteen transverse support columns 202; the annular ring surrounds the rotary cylinder 1, and all the transverse support columns 202 are arranged in an array around the circumference of the annular ring, and the annular ring 201 and the transverse support column 202 are fixedly connected. The hollow support frame 21 has a plurality of hollow areas, so that the heat of the second heating wire 23 can be better transmitted to the rotary cylinder 1.

[0057] Finally, it should be noted that although the above-mentioned embodiments have been described in the specification and drawings of the present application, they cannot limit the patent protection scope of the present application. Any equivalent structure or equivalent flow replacement or modification based on the essential concept of the present application, using the content described in the specification and drawings of the present application, and directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A rotary kiln with uniform heating, characterized by, The rotary drum (1) can rotate around the center line of the rotary drum (1); The heating assembly (2) comprises a hollow support frame (21) surrounding the rotary drum (1), a first heating wire (22) spirally wound on one side of the hollow support frame (21) close to the rotary drum (1), and a second heating wire (23) spirally wound on the other side of the hollow support frame (21) away from the rotary drum (1), and the spiral winding direction of the first heating wire (22) is opposite to that of the second heating wire (23); The heat preservation shell (3) is arranged outside the heating assembly (2). It also includes a first rotary drive motor (4); 2. The uniformly heated rotary kiln of claim 1, wherein, The hollow support frame (21) is rotatably installed on the heat preservation shell (3) around the center line of the rotary drum (1); one end of the hollow support frame (21) is provided with a first transmission gear (41), and the driving shaft of the first rotary drive motor (4) is transmissionally connected with a second transmission gear (42), and the first transmission gear (41) is meshingly connected with the second transmission gear (42). The other end of the hollow support frame (21) is provided with a conductive slip ring (43), and the conductive slip ring (43) is connected with the first heating wire (22) and the second heating wire (23) respectively to supply power to the first heating wire (22) and the second heating wire (23).

3. The uniformly heated rotary kiln of claim 1, wherein, It also includes a second rotary drive motor (5); 4. The uniformly heated rotary kiln of claim 1, wherein, The third transmission gear (51) is installed on the rotary drum (1), the driving shaft of the second rotary drive motor (5) is transmissionally connected with a fourth transmission gear (52), and the third transmission gear (51) is meshed with the fourth transmission gear (52). The first heating wire (22) is spirally arranged clockwise around the center line of the rotary drum (1), and the second heating wire (23) is spirally arranged counterclockwise around the center line of the rotary drum (1).

5. The uniformly heated rotary kiln of claim 1, wherein, It also includes a cooling device (6) sleeved on the rotary drum (1), and the cooling device (6) is arranged in a spaced manner with the heat preservation shell (3).

6. The uniformly heated rotary kiln of claim 1, wherein, The heat preservation shell (3) comprises a shell body (31) and a heat preservation layer (32) installed on the inner side of the shell body (31).

7. The uniformly heated rotary kiln of claim 1, wherein, The rotary drum (1) is provided with a feeding port, and the feeding port is provided with a sealable sealing cover (7).

8. The uniformly heated rotary kiln of claim 1, wherein, The winding spacing of the first heating wire (22) is equal to the winding spacing of the second heating wire (23), and the diameter of the first heating wire (22) is equal to the diameter of the second heating wire (23).

9. The uniformly heated rotary kiln of claim 1, wherein, The hollow support frame (21) comprises at least two annular rings (201) and sixteen transverse support columns (202); 10. The uniformly heated rotary kiln of claim 1, wherein, The annular ring (201) surrounds the rotary drum (1), and all the transverse support columns (202) are arranged in an array around the circumference of the annular ring (201), and the annular ring (201) and the transverse support column (202) are fixedly connected. ​

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