A cylinder dryer with an inner cylinder diameter adjustable and an inner cylinder adjusting method

Abstract

The present application belongs to the technical field of cylinder dryers, in particular to a cylinder dryer with an inner cylinder diameter adjustable and an inner cylinder adjusting method. The cylinder dryer with an inner cylinder diameter adjustable comprises an outer cylinder, and an inner cylinder is arranged in the outer cylinder. The inner cylinder comprises steel sheets with elastic function, and the steel sheets are at least four. An arc adjusting mechanism for bending the steel sheets as a whole into an arc structure in cross section is arranged corresponding to each steel sheet. All the steel sheets are sequentially overlapped to form a cylindrical structure with an adjustable diameter, and the arc adjusting mechanism is located in the cylinder of the cylindrical structure. The inner cylinder diameter is adjustable, and the materials with different dryness and wetness can be dried conveniently.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cylindrical dryers, in particular to a cylindrical dryer with an inner cylinder diameter adjustment and an inner cylinder adjustment method. BACKGROUND

[0002] The main body of the cylindrical dryer is a slightly inclined (also horizontal) and rotatable cylinder, and the main structure includes a drying system, an outer cylinder, a driving mechanism for driving the rotation of the outer cylinder, and an inner cylinder arranged in the outer cylinder. Wet materials are added from one end, and are dried by effectively contacting the hot air or heated wall surface in the cylinder. The rotary cylindrical dryer is a device that is both heated by high temperature and has conveying function, and is widely used in food, chemical, metallurgical, building material and other industries.

[0003] The inner cylinder of the rotary cylindrical dryer is arranged to block the falling of the materials after being lifted by the rotation of the outer cylinder, so that the materials are more evenly dried in a certain section of the cylinder. With the rotation of the cylinder, the materials move to the lower end under the action of gravity. During the forward movement of the wet materials in the cylinder, they are directly or indirectly heated by the heat carrier, so that the wet materials can be dried. There are scoops on the inner wall of the outer cylinder, which lift and drop the materials to increase the contact surface between the materials and the airflow, thereby improving the drying efficiency and promoting the forward movement of the materials. However, due to the uneven surface and internal heat transfer of the materials during this process, and the presence of the heat carrier at the feeding end, the temperature gradually decreases from the feeding end to the discharging end, which greatly reduces the drying efficiency of the materials. The presence of the inner cylinder hinders the falling of the materials after being lifted, and the materials do not continue to fall along the gravity direction after colliding with the inner cylinder. The materials are hindered to move forward under the action of the inner cylinder, and the dropping position moves to the feeding port relative to the original position, so that the materials are heated for a longer time at a higher temperature side, and the heating time of a certain section is suitable for the heating time required by the materials in that time period, so that the drying efficiency of the materials in that section is better.

[0004] Currently, there are two main rotary cylindrical drying devices: a cylindrical drying device without an inner cylinder, and a fixed inner cylinder type cylindrical drying device. In the former, the materials are repeatedly lifted and dropped by the outer cylinder and the scoops, and the materials are dried. However, due to the temperature difference between the external airflow, the material surface and the material interior, the heat transfer efficiency and the material drying efficiency also differ significantly. In the latter, the diameter of the inner cylinder is set to change the falling time of the materials, thereby improving the heating efficiency of the materials.

[0005] The fixed inner cylinder type cylindrical drying device can only dry single materials or materials with similar dryness, which has great limitations. For materials with different dryness, the diameter of the inner cylinder needs to be adjusted to adjust the lifting and falling of the materials during drying, and finally to adjust the drying time. SUMMARY

[0006] In view of the above deficiencies in the prior art, the technical problem to be solved by the present application is to provide a cylindrical dryer with an adjustable inner cylinder diameter and an inner cylinder adjustment method, which can adjust the inner cylinder diameter and facilitate drying of materials with different dryness levels.

[0007] The cylindrical dryer with an adjustable inner cylinder diameter comprises an outer cylinder, and an inner cylinder arranged in the outer cylinder, wherein the inner cylinder comprises steel sheets with elastic function, at least four steel sheets are provided, an arc-shaped adjustment mechanism for bending the steel sheets as a whole into an arc-shaped structure in cross section is arranged corresponding to each steel sheet, all the steel sheets are sequentially overlapped to form a cylindrical structure with an adjustable diameter, and the arc-shaped adjustment mechanism is located in the cylinder of the cylindrical structure.

[0008] Further, each steel sheet has two overlapped edges in the length direction, which are a fixed overlapped edge and a floating overlapped edge respectively; when two adjacent steel sheets are overlapped, the floating overlapped edge of one steel sheet is overlapped outside the fixed overlapped edge of the other steel sheet.

[0009] Further, the arc-shaped adjustment mechanism comprises an inner cylinder support shaft, a hydraulic cylinder is arranged between the inner cylinder support shaft and the steel sheet at the fixed overlapped edge, wherein the cylinder barrel of the hydraulic cylinder is fixed on the inner cylinder support shaft, and the piston rod of the hydraulic cylinder is fixed on the steel sheet at the fixed overlapped edge.

[0010] A motor is arranged between the inner cylinder support shaft and the steel sheet at the floating overlapped edge, the motor is installed on the inner cylinder support shaft, a pull wire is arranged between the output shaft of the motor and the steel sheet at the floating overlapped edge, one end of the pull wire is fixed on the steel sheet at the floating overlapped edge, and the other end of the pull wire is wound on the output shaft.

[0011] At least one through hole is formed on each steel sheet, the through hole is in communication with the inside and outside of the steel sheet, and a guide rod is independently arranged in the through hole; one end of the guide rod is located outside the steel sheet through the through hole, and the other end of the guide rod is fixed on the inner cylinder support shaft.

[0012] Further, the number of steel sheets is even n, and the number of motors is n / 2, wherein the connection mode of the pull wires between the two steel sheets symmetrically arranged along the center line of the inner cylinder and the output shaft of the motor is as follows:

[0013] One end of each of the two pull wires is fixed on the steel sheet at the corresponding floating overlapped edge, and the output shaft of the motor is divided into two sections; the other end of one of the pull wires is wound clockwise on the first section of the output shaft, and the other end of the other pull wire is wound counterclockwise on the second section of the output shaft.

[0014] Further, the center line of the inner cylinder support shaft is on the same straight line as the center line of the inner cylinder.

[0015] Further, the number of steel sheets is eight.

[0016] Further, the inner cylinder support shaft is provided with support frames at both ends for support, and the end of the inner cylinder support shaft is installed on the corresponding support frame through a bearing, and the outer cylinder is located between the two support frames.

[0017] Further, a protective sleeve is sleeved on the guide rod outside the steel sheet, and the protective sleeve is fixed on the steel sheet.

[0018] Further, the design also includes an inner cylinder adjusting method of the cylinder dryer with adjustable inner cylinder diameter, which comprises the following steps:

[0019] Step 1: Obtain the diameter information of the inner cylinder (1) according to the trajectory of the particles in the cylinder; the formula is:

[0020]

[0021] In the formula, L is the length of the outer cylinder, t is the particle residence time, n is the rotating speed of the outer cylinder, alpha is the inclination angle of the outer cylinder, and gamma is the length coefficient.

[0022] Step 2: Control the stroke of the hydraulic cylinder and the distance between the output shaft of the motor and the steel sheet according to the diameter information in step 1.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] The present application adopts the structure of adjustable inner cylinder diameter, which is convenient for drying materials with different dry and wet degrees, has compact structure, high practicability, is easy to manufacture, can better complete the drying work, and can better adapt to actual work requirements. DETAILED DESCRIPTION

[0025] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description, explain the principles of the present disclosure, wherein the drawings are included to provide further understanding of the present disclosure and are incorporated in and constitute a part of the specification.

[0026] Figure 1 It is a structural schematic diagram of the present application;

[0027] Figure 2 It is a structural schematic diagram of the present application;

[0028] Figure 3 It is a structural schematic diagram of the present application; Figure 1 It is a structural schematic diagram of the present application;

[0029] Figure 4 It is a structural schematic diagram of the present application;

[0030] Figure 5 It is a structural schematic diagram of the present application;

[0031] Figure 6 This is a schematic diagram of the particle velocity curve inside the cylinder;

[0032] Figure 7 This is a schematic diagram of the structure where two adjacent steel sheets overlap by 1.2.

[0033] The components in the diagram are named as follows: 1. Inner cylinder; 1.1 Support frame; 1.2 Steel sheet; 1.3 Through hole; 1.4 Guide rod; 1.5 Hydraulic cylinder; 1.6 Motor; 1.7 Inner cylinder support shaft; 1.8 Bearing; 2. Outer cylinder. Detailed Implementation

[0034] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0035] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Example

[0037] like Figures 1 to 5 As shown in the figure, the cylindrical dryer with an adjustable inner cylinder diameter described in this embodiment includes an outer cylinder 2, and an inner cylinder 1 is disposed inside the outer cylinder 2. The inner cylinder 1 includes a steel sheet 1.2 with elastic function.

[0038] In this embodiment, there are 8 steel sheets 1.2. The specific number can be determined according to the diameter of the outer cylinder 2 and the difficulty of forming the inner cylinder 1. At least four steel sheets 1.2 are used in application.

[0039] Each steel sheet 1.2 is equipped with an arc-shaped adjustment mechanism for bending the steel sheet 1.2 into an arc-shaped cross-section. All steel sheets 1.2 are stacked together to form a cylindrical structure with an adjustable diameter. The arc-shaped adjustment mechanism is located inside the cylindrical structure.

[0040] Each steel sheet 1.2 has two overlapping edges along its length: a fixed overlapping edge and a floating overlapping edge. When two adjacent steel sheets 1.2 overlap, the floating overlapping edge of one steel sheet 1.2 overlaps the outside of the fixed overlapping edge of the other steel sheet 1.2.

[0041] The arc-shaped adjustment mechanism includes an inner cylinder support shaft 1.7, and a hydraulic cylinder 1.5 is provided between the inner cylinder support shaft 1.7 and the steel plate 1.2 at the fixed overlapping edge. The cylinder barrel of the hydraulic cylinder 1.5 is fixed on the inner cylinder support shaft 1.7, and the piston rod of the hydraulic cylinder 1.5 is fixed on the steel plate 1.2 at the fixed overlapping edge.

[0042] The hydraulic cylinder 1.5 supports the steel sheet 1.2 and adjusts the fixed lap joint edge of the steel sheet 1.2. When the piston rod of the hydraulic cylinder 1.5 is extended, the fixed lap joint edge of the steel sheet 1.2 is away from the inner cylinder support shaft 1.7. Conversely, when the piston rod of the hydraulic cylinder 1.5 is shortened, the fixed lap joint edge of the steel sheet 1.2 is close to the inner cylinder support shaft 1.7.

[0043] The motor 1.6 is arranged between the inner cylinder support shaft 1.7 and the steel sheet 1.2 at the floating lap joint edge. The motor 1.6 is installed on the inner cylinder support shaft 1.7. The output shaft of the motor 1.6 and the steel sheet 1.2 at the floating lap joint edge are provided with a pull wire. One end of the pull wire is fixed on the steel sheet 1.2 at the floating lap joint edge, and the other end is wound on the output shaft.

[0044] The motor 1.6 and the pull wire can adjust the floating lap joint edge of the steel sheet 1.2. When the motor 1.6 rotates forward, the floating lap joint edge of the steel sheet 1.2 is away from the inner cylinder support shaft 1.7. Conversely, when the motor 1.6 reverses, the floating lap joint edge of the steel sheet 1.2 is close to the inner cylinder support shaft 1.7.

[0045] The number of the steel sheet 1.2 is even n, which can also be odd in actual application. Using even number can reduce the number of the motor 1.6 and save production cost.

[0046] The number of the motor 1.6 is n / 2. The connection mode between the two steel sheets 1.2 symmetrically arranged along the center line of the inner cylinder 1 and the output shaft of the motor 1.6 is as follows:

[0047] One end of the two pull wires is fixed on the corresponding steel sheet 1.2 at the floating lap joint edge. The output shaft of the motor 1.6 is divided into two sections. The other end of one pull wire is wound clockwise on the first section of the output shaft, and the other end of the other pull wire is wound counterclockwise on the second section of the output shaft.

[0048] The axis of the inner cylinder support shaft 1.7 is on the same straight line as the center line of the inner cylinder 1.

[0049] One motor 1.6 can adjust the distance between the output shaft of the two motors 1.6 and the steel sheet 1.2.

[0050] At least one through hole 1.3 is formed on each steel sheet 1.2, which is connected with the inside and outside. A guide rod 1.4 is independently arranged in the through hole 1.3. One end of the guide rod 1.4 passes through the through hole 1.3 and is located outside the steel sheet 1.2, and the other end is fixed on the inner cylinder support shaft 1.7.

[0051] Under the action of the guide rod 1.4, the steel sheet 1.2 has a certain guiding effect when it is bent and deformed, preventing the steel sheet 1.2 from running wildly.

[0052] The number of the guide rods 1.4 matched with the through holes 1.3 is determined according to the length and thickness of the steel sheet 1.2 in practical application. When the length of the steel sheet 1.2 is too long or the thickness is too thin, two or more guide rods 1.4 matched with the through holes 1.3 are used to ensure the overall structure of the steel sheet 1.2 after deformation.

[0053] The inner cylinder support shaft 1.7 is provided with a support frame 1.1 at both ends for support. The end of the inner cylinder support shaft 1.7 is installed on the corresponding support frame 1.1 through a bearing 1.8, and the outer cylinder 2 is located between the two support frames 1.1.

[0054] In order to prevent the material from damaging the guide rods 1.4 on the outer side of the steel sheet 1.2, a protective sleeve is slid on the guide rods 1.4 on the outer side of the steel sheet 1.2, and the protective sleeve is fixed on the steel sheet 1.2.

[0055] The embodiment also includes an inner cylinder adjusting method of the cylinder dryer with adjustable inner cylinder diameter, which comprises the following steps:

[0056] Step 1, as shown in Figure 6 , the diameter information of the inner cylinder 1 is obtained according to the particle trajectory in the cylinder; the formula is:

[0057]

[0058] In the formula, L is the length of the outer cylinder 2, unit m;

[0059] t is the particle residence time, unit min;

[0060] n is the rotating speed of the outer cylinder 2, unit m / min;

[0061] α is the inclination angle of the outer cylinder 2, unit degree;

[0062] γ is the length coefficient, unit m.

[0063] Step 2, according to the diameter information in step 1, the stroke of the hydraulic cylinder 1.5 and the distance of the output shaft of the motor 1.6 to the steel sheet 1.2 are controlled.

[0064] The adjustable range value K of the inner cylinder 1 needs to be determined according to the matching distance S of the adjacent two steel sheets 1.2 and the number W of the steel sheets 1.2. The minimum value of the adjustable range value K is 0, and the maximum value is obtained by the following formula:

[0065] K 最大值 =W*S.

[0066] When the inner cylinder 1 is being reduced in diameter, the hydraulic cylinder 1.5 preferably synchronously adjusts the fixed lap of the steel sheet 1.2 and the floating lap of the steel sheet 1.2 by the motor 1.6, so that the adjustment distance of the fixed lap and the floating lap of the steel sheet 1.2 synchronously changes, which is very suitable for the inner cylinder 1 to be reduced in diameter in the working state. Of course, the floating lap of the steel sheet 1.2 can be adjusted by the motor 1.6 first, and then the fixed lap of the steel sheet 1.2 can be adjusted by the hydraulic cylinder 1.5.

[0067] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, the person skilled in the art can combine and combine the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples, without contradiction.

[0068] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0069] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. Based on the above disclosure, other changes or modifications can also be made by those skilled in the art, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A method for adjusting the inner cylinder of a cylinder dryer with adjustable inner cylinder diameter, comprising an outer cylinder (2) in which an inner cylinder (1) is arranged, characterized in that: The inner cylinder (1) comprises steel sheets (1.2) with elastic function, and the steel sheets (1.2) are at least four pieces, and an arc adjusting mechanism for bending the steel sheets (1.2) into an arc structure is arranged on each steel sheet (1.2), and all the steel sheets (1.2) are sequentially overlapped to form a cylindrical structure with adjustable diameter, and the arc adjusting mechanism is located in the cylinder of the cylindrical structure; each steel sheet (1.2) has two overlapped edges in the length direction, which are respectively fixed overlapped edges and floating overlapped edges; when two adjacent steel sheets (1.2) are overlapped, the floating overlapped edge of one steel sheet (1.2) is overlapped outside the fixed overlapped edge of the other steel sheet (1.2). The arc adjusting mechanism comprises an inner cylinder support shaft (1.7), and a hydraulic cylinder (1.5) is arranged between the inner cylinder support shaft (1.7) and the steel sheet (1.2) at the fixed overlapped edge, wherein the cylinder barrel of the hydraulic cylinder (1.5) is fixed on the inner cylinder support shaft (1.7), and the piston rod of the hydraulic cylinder (1.5) is fixed on the steel sheet (1.2) at the fixed overlapped edge; A motor (1.6) is arranged between the inner cylinder support shaft (1.7) and the steel sheet (1.2) at the floating overlapped edge, and the motor (1.6) is installed on the inner cylinder support shaft (1.7), and a pull wire is arranged between the output shaft of the motor (1.6) and the steel sheet (1.2) at the floating overlapped edge; one end of the pull wire is fixed on the steel sheet (1.2) at the floating overlapped edge, and the other end of the pull wire is wound on the output shaft; At least one through hole (1.3) is formed on each steel sheet (1.2), and a guide rod (1.4) is independently arranged in the through hole (1.3); one end of the guide rod (1.4) passes through the through hole (1.3) and is located outside the steel sheet (1.2), and the other end of the guide rod (1.4) is fixed on the inner cylinder support shaft (1.7); The inner cylinder adjusting method comprises the following steps: Step 1: obtaining the diameter information of the inner cylinder (1) according to the particle trajectory in the cylinder; the formula is: where D is the diameter of the inner cylinder (1) in meters; L is the length of the outer cylinder (2) in meters; t is the particle residence time in minutes; N is the rotational speed of the outer cylinder (2) in meters per minute; a is the angle of inclination of the outer cylinder (2) in degrees; Step 2: controlling the stroke of the hydraulic cylinder (1.5) and the distance between the output shaft of the motor (1.6) and the steel sheet (1.2) according to the diameter information in step 1. L is the length coefficient in meters; The number of steel sheets (1.2) is even n, and the number of motors (1.6) is n / 2, wherein the connection mode of the pull wires between the two steel sheets (1.2) symmetrically arranged along the center line of the inner cylinder (1) and the output shaft of the motor (1.6) is as follows:

2. The inner cylinder adjusting method of the cylinder dryer with an inner cylinder of which the diameter is adjustable according to claim 1, characterized by: One end of each of the two pull wires is fixed on the steel sheet (1.2) at the corresponding floating overlapped edge, and the output shaft of the motor (1.6) is divided into two sections; the other end of one of the pull wires is wound clockwise on the first section of the output shaft, and the other end of the other pull wire is wound counterclockwise on the second section of the output shaft. The center line of the inner cylinder support shaft (1.7) is on the same straight line as the center line of the inner cylinder (1).

3. The inner cylinder adjusting method of a cylinder dryer with an inner cylinder diameter adjustable according to claim 1 or 2, characterized in that: The number of steel sheets (1.2) is 8.

4. The inner cylinder adjusting method of a cylinder dryer with an inner cylinder diameter adjustable according to claim 1 or 2, characterized in that: Support frames (1.1) are arranged at both ends of the inner cylinder support shaft (1.7) for supporting, and the end of the inner cylinder support shaft (1.7) is installed on the corresponding support frame (1.1) through a bearing (1.8), and the outer cylinder (2) is located between the two support frames (1.1).

5. The inner cylinder adjusting method of a cylinder dryer with an inner cylinder diameter adjustable according to claim 1 or 2, characterized by: ​ 6. The inner cylinder adjusting method of the cylinder dryer with an inner cylinder of which the diameter is adjustable according to claim 2, characterized by: The guide rod (1.4) outside the steel sheet (1.2) is sleeved with a protective sleeve, and the protective sleeve is fixed on the steel sheet (1.2).

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