A rotary kiln for distiller's grains feed production system

Abstract

The present invention discloses a rotary kiln for a distiller's grains feed production system, which relates to the technical field of rotary kilns and can solve the problem that the current rotary kiln is prone to uneven heating of the distiller's grains feed, and is prone to scaling or carbonization when processing the distiller's grains feed. A rotary kiln for a distiller's grains feed production system according to an embodiment of the present invention comprises a kiln barrel assembly, a rod barrel assembly arranged in the kiln barrel assembly, and a plurality of cables uniformly distributed along the circumference of the rod barrel assembly, wherein: the central axis of the rod barrel assembly coincides with the central axis of the kiln barrel assembly; one end of the cable is fixedly connected to the inner peripheral wall of the kiln barrel assembly, and the other end is fixedly connected to the outer peripheral wall of the rod barrel assembly; and also comprises a lifting and striking block which is sleeved on the cable and can slide freely on the cable.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kilns, and in particular to a rotary kiln used in a distiller's grains feed production system. Background Art

[0002] During the production process of alcoholic beverages such as liquor and beer, a large amount of distiller's grains will be produced. Due to the high water content and high acidity of the distiller's grains themselves, they are prone to mold if not handled in time.

[0003] At present, the treatment of distiller's grains is generally to use them as feed after fermentation. In the production process of distiller's grains feed, the production process is generally as follows: first pre-fermentation and degradation of lignin in the distiller's grains, then filtering to form distiller's grains to be fermented, followed by high temperature and high pressure bacteria removal treatment. After the sterilization treatment is completed, a pre-prepared mixed bacterial liquid composed of yeast, lactic acid bacteria, mold and other species is sprayed into the distiller's grains to be fermented, and the distiller's grains are continuously turned over during the fermentation process. After the fermentation is completed, the rotary kiln treatment process is carried out. After the rotary kiln process is completed, the distiller's grains feed is crushed and packaged, and the entire distiller's grains feed is completed.

[0004] At present, during the rotary kiln process, after the materials are put into the rotary kiln, due to fermentation reasons, if the turning is not timely, the fermentation temperature is not suitable and other factors, the distiller's grains feed will stick together and clump. If it cannot be lifted and rolled up with the rotation of the rotary kiln in time, it will easily lead to uneven treatment of the distiller's grains feed. In addition, during the long-term operation of the rotary kiln, the distiller's grains feed will easily cause scaling and carbonization on the inner wall of the rotary kiln, affecting the treatment effect and product quality of the distiller's grains feed.

[0005] Based on the above background, the inventor has designed a rotary kiln for a distiller's grains feed production system to solve at least one of the above problems, and thus proposed the present application. Summary of the invention

[0006] The present application provides a rotary kiln for a distiller's grains feed production system, which is used to solve the problem that the distiller's grains feed is easily heated unevenly and easily scaled or carbonized when the current rotary kiln processes the distiller's grains feed.

[0007] In order to solve the above technical problems, the present invention adopts the following solutions:

[0008] The present application provides a rotary kiln for a distiller's grains feed production system, comprising a kiln barrel assembly, a rod barrel assembly arranged in the kiln barrel assembly, and a plurality of cables evenly distributed along the circumference of the rod barrel assembly, wherein:

[0009] The central axis of the rod barrel assembly coincides with the central axis of the kiln barrel assembly;

[0010] One end of the cable is fixedly connected to the inner peripheral wall of the kiln barrel assembly, and the other end is fixedly connected to the outer peripheral wall of the rod barrel assembly;

[0011] The utility model also comprises a material lifting striking block which is sleeved on the cable and can slide freely on the cable.

[0012] Optionally, the rod-barrel assembly comprises a coaxially sleeved barrel and a rod body, the rod body is located in the barrel body and can slide back and forth in the barrel body along its axial direction, and both ends of the rod body extend outward from the barrel body;

[0013] It also includes two sets of mounting frame assemblies for limiting the circumferential rotation of the rod body, and a hydraulic drive mechanism for driving the mounting frame assemblies to reciprocate along the axial direction of the kiln barrel assembly. The two sets of mounting frame assemblies are fixedly connected to the two ends of the rod body respectively;

[0014] The barrel assembly includes two states:

[0015] State 1: The rod body is in a relatively free state with the cylinder body along the circumferential direction;

[0016] State 2: The rod body is in a relatively locked state with the cylinder body along the circumferential direction;

[0017] The kiln tube assembly comprises a rigid outer kiln tube and a deformable elastic inner kiln tube, wherein the rigid outer kiln tube is sleeved on the elastic inner kiln tube, an annular cavity is provided between the rigid outer kiln tube and the elastic inner kiln tube, and a plurality of connectors are distributed along the circumference of the annular cavity and used to connect the rigid outer kiln tube and the elastic inner kiln tube;

[0018] One end of the cable is fixedly connected to the inner peripheral wall of the elastic inner kiln cylinder, and the other end is fixedly connected to the outer peripheral wall of the cylinder.

[0019] Optionally, the cylinder body comprises inner keyway segments and cylindrical segments that are staggered, and the rod body comprises outer keyway segments and cylindrical segments that are staggered;

[0020] The outer diameter of the outer keyway section is smaller than the inner diameter of the cylindrical section, and the length of the outer keyway section is smaller than or equal to the length of the cylindrical section;

[0021] The outer diameter of the round rod segment is smaller than the inner diameter of the inner key groove segment, and the length of the round rod segment is greater than or equal to the length of the inner key groove segment;

[0022] The sum of the lengths of the outer keyway section and the round rod section is equal to the sum of the lengths of the cylinder section and the inner keyway section;

[0023] The inner keyway section is provided with a plurality of first strip-shaped limiting protrusions and first strip-shaped limiting grooves which are staggeredly distributed along the circumferential direction of the inner circumferential wall of the cylinder body, and the outer keyway section is provided with a plurality of second strip-shaped limiting protrusions and second strip-shaped limiting grooves which are staggeredly distributed along the circumferential direction of the outer circumferential wall of the rod body, the first strip-shaped limiting protrusions and the second strip-shaped limiting grooves are matched with each other, and the first strip-shaped limiting grooves are matched with the second strip-shaped limiting protrusions.

[0024] Optionally, the longitudinal cross-sectional shape of the first strip-shaped limiting protrusion, the first strip-shaped limiting groove, the second strip-shaped limiting protrusion and the second strip-shaped limiting groove is any one of a rectangular, a fan-shaped ring, a triangle and a semicircle.

[0025] Optionally, the mounting frame assembly includes a fixedly connected connecting frame and a guide rod, and a guide cylinder for fixing on a fixed plane or a fixed structure, wherein:

[0026] The connecting frame is fixed to the end of the rod body;

[0027] The guide rod and the guide cylinder are both arranged parallel to the central axis direction of the rod body, and the guide rod is inserted into the guide cylinder and is slidably connected with the guide cylinder along the axial direction;

[0028] The output end of the hydraulic drive mechanism is fixedly connected to the guide rod or the connecting frame.

[0029] Optionally, the connectors are staggeredly distributed along the circumference of the kiln drum assembly with the fixed ends of the cables fixed to the elastic inner kiln drum.

[0030] Optionally, the cable is provided with a limiter located between the elastic inner kiln cylinder and the rod cylinder assembly;

[0031] The material lifting and striking block is located between the limiting body and the elastic inner kiln tube.

[0032] Optionally, the limiting body is detachably fixedly connected to the cable.

[0033] Optionally, the longitudinal section of the lifting and striking block is L-shaped or T-shaped;

[0034] At least two through-type sliding holes arranged side by side and used for installing the cable are arranged in the material lifting striking block.

[0035] Optionally, the lifting and striking block has an angled end which is arranged away from the kiln drum assembly.

[0036] Beneficial effects of the present invention:

[0037] 1. The present application arranges a rod-barrel assembly and a plurality of cables in the kiln barrel assembly, as well as a lifting and striking block which is mounted on the cables and can slide freely on the cables, so that during the operation of the rotary kiln of the present application, the cables can continuously break up the materials in the kiln barrel assembly, and the lifting and striking block continuously drives the broken materials to move upward and fall down. After the cables gradually rotate to the top of the rod-barrel assembly, the lifting and striking block will slide down close to the rod-barrel assembly under the action of gravity. As the cables continue to rotate, under the synergistic effect of centrifugal force and the sliding of the lifting and striking block, as well as the guiding effect of the cables, the lifting and striking block will be thrown toward and hit the inner wall of the kiln barrel assembly, so that the area near the inner wall of the kiln barrel assembly that is hit will generate certain vibrations, thereby preventing the materials from continuously adhering to the inner wall of the kiln barrel assembly, and preventing the materials from scaling or carbonizing in the kiln barrel assembly.

[0038] 2. The kiln drum assembly of the present application includes an elastic inner kiln drum and a rigid outer kiln drum, and an annular cavity is provided between the elastic inner kiln drum and the rigid outer kiln drum, which can increase the vibration amplitude and effective vibration area generated after the lifting and striking block hits the elastic inner kiln drum.

[0039] 3. Based on the elastic inner kiln cylinder and the rigid outer kiln cylinder, the rod-barrel assembly of the present application includes a barrel body and a rod body, and the rod-barrel assembly has a free state in which the rod-barrel assembly can rotate relatively freely in the circumferential direction and a locked state in which the rod-barrel assembly is relatively locked in the circumferential direction. Between the switching between the free state and the locked state of the rod-barrel assembly, the cable can be repeatedly pulled or released, so that the cable can repeatedly pull the elastic inner kiln cylinder to slightly deform, or release the slightly deformed elastic inner kiln cylinder to rebound into a round shape, thereby preventing or breaking scaling;

[0040] The present application can also control the switching speed of the free state and the locked state of the rod-barrel assembly, so that when the lifting and striking block approaches the rod-barrel assembly, the rod-barrel assembly is switched to the locked state, causing the cable to pull the elastic inner kiln barrel to slightly deform. At the same time, when the lifting and striking block moves away from the rod-barrel assembly and quickly slides toward the elastic inner kiln barrel, the rod-barrel assembly is switched to the free state, causing the cable to release the slightly deformed elastic inner kiln barrel, forming a synchronous or sequential vibration relationship, expanding the vibration amplitude, extending the single vibration time, and improving the effect of preventing or breaking scaling. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0042] Figure 2 It is a schematic diagram of the cross-sectional structure of the embodiment of the present application during the descaling process.

[0043] Figure 3 It is a schematic cross-sectional structural diagram of the rod barrel assembly in the embodiment of the present application when it is in a free state.

[0044] Figure 4 It is a schematic cross-sectional structural diagram of the rod barrel assembly in the embodiment of the present application when it is in a locked state.

[0045] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of AA.

[0046] Figure 6 This is a schematic diagram of the structure of this application.

[0047] Figure 7 It is a schematic diagram of the three-dimensional structure of the lifting and striking block in this application.

[0048] Explanation of the accompanying drawings: 1-kiln cylinder assembly, 11-rigid outer kiln cylinder, 12-elastic inner kiln cylinder, 13-connecting body, 14-annular cavity, 2-rod-cylinder assembly, 21-cylinder body, 211-inner keyway section, 212-cylinder section, 22-rod body, 221-outer keyway section, 222-round rod section, 3-pull cable, 31-limiting body, 4-lifting impact block, 401-through sliding hole, 5-mounting frame assembly, 51-connecting frame, 52-guide rod, 53-guide cylinder, 6-hydraulic drive mechanism. DETAILED DESCRIPTION

[0049] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0050] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0051] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0053] like Figures 1 to 7 As shown, the present application provides a rotary kiln for a distiller's grains feed production system, comprising a kiln barrel assembly 1, a rod barrel assembly 2 arranged in the kiln barrel assembly 1, and a plurality of cables 3 evenly distributed along the circumference of the rod barrel assembly 2, wherein:

[0054] The central axis of the rod barrel assembly 2 coincides with the central axis of the kiln barrel assembly 1;

[0055] One end of the cable 3 is fixedly connected to the inner peripheral wall of the kiln tube assembly 1, and the other end is fixedly connected to the outer peripheral wall of the rod tube assembly 2;

[0056] The utility model also comprises a material lifting striking block 4 which is sleeved on the cable 3 and can slide freely on the cable 3 .

[0057] In this embodiment, a rod-barrel assembly 2 and a plurality of cables 3 are arranged in the kiln barrel assembly 1, and a lifting and striking block 4 is mounted on the cables 3 and can slide freely on the cables 3, so that during the operation of the rotary kiln of this application, the cables 3 can continuously break up the materials in the kiln barrel assembly 1, and the lifting and striking blocks 4 continuously drive the broken materials to move upward and fall down. After the cables 3 gradually rotate to the top of the rod-barrel assembly 2, the lifting and striking blocks 4 will slide down close to the rod-barrel assembly 2 under the action of gravity. As the cables 3 continue to rotate, under the synergistic effect of the centrifugal force and the sliding of the lifting and striking blocks 4, and the guiding effect of the cables 3, the lifting and striking blocks 4 will be thrown toward and hit the inner wall of the kiln barrel assembly 1, so that the area near the inner wall of the kiln barrel assembly 1 that is hit will generate certain vibrations, thereby preventing the materials from continuously adhering to the inner wall of the kiln barrel assembly 1, and preventing the materials from scaling or carbonizing in the kiln barrel assembly 1.

[0058] Specifically, in this embodiment, if Figures 1 to 6 As shown, the rod-barrel assembly 2 comprises a coaxially sleeved barrel 21 and a rod 22, the rod 22 is located in the barrel 21 and can slide back and forth in the barrel 21 along its axial direction, and both ends of the rod 22 extend outward from the barrel 21;

[0059] It also includes two sets of mounting frame assemblies 5 for limiting the circumferential rotation of the rod body 22, and a hydraulic drive mechanism 6 for driving the mounting frame assemblies 5 to reciprocate along the axial direction of the kiln tube assembly 1. The two sets of mounting frame assemblies 5 are fixedly connected to both ends of the rod body 22 respectively.

[0060] The barrel assembly 2 includes two states:

[0061] State 1: the rod body 22 is in a relatively free state with the cylinder body 21 along the circumferential direction;

[0062] State 2: the rod body 22 is in a relatively locked state with the cylinder body 21 along the circumferential direction;

[0063] The kiln tube assembly 1 comprises a rigid outer kiln tube 11 and a deformable elastic inner kiln tube 12, wherein the rigid outer kiln tube 11 is sleeved on the elastic inner kiln tube 12, an annular cavity 14 is provided between the rigid outer kiln tube 11 and the elastic inner kiln tube 12, and a plurality of connectors 13 are distributed along the circumference of the annular cavity 14 and used to connect the rigid outer kiln tube 11 and the elastic inner kiln tube 12;

[0064] One end of the cable 3 is fixedly connected to the inner peripheral wall of the elastic inner kiln cylinder 12 , and the other end is fixedly connected to the outer peripheral wall of the cylinder body 21 .

[0065] The kiln tube assembly 1 of this embodiment includes an elastic inner kiln tube 12 and a rigid outer kiln tube 11, and an annular cavity 14 is provided between the elastic inner kiln tube 12 and the rigid outer kiln tube 11, which can increase the vibration amplitude and effective vibration area generated after the lifting and striking block 4 hits the elastic inner kiln tube 12.

[0066] On the basis of the elastic inner kiln tube 12 and the rigid outer kiln tube 11, the rod-barrel assembly 2 includes a barrel 21 and a rod body 22, and the rod-barrel assembly 2 has a free state in which it can rotate relatively freely in the circumferential direction and a locked state in which it is relatively locked in the circumferential direction. Between the switching between the free state and the locked state of the rod-barrel assembly 2, the cable 3 can be repeatedly pulled or released, so that the cable 3 can repeatedly pull the elastic inner kiln tube 12 to slightly deform, or release the slightly deformed elastic inner kiln tube 12 to rebound into a round shape, thereby preventing or breaking scaling;

[0067] At the same time, the present embodiment can also control the switching speed of the free state and the locked state of the rod-barrel assembly 2, so that when the lifting and striking block 4 approaches the rod-barrel assembly 2, the rod-barrel assembly 2 is switched to the locked state, so that the cable 3 pulls the elastic inner kiln cylinder 12 to slightly deform. At the same time, when the lifting and striking block 4 moves away from the rod-barrel assembly 2 and quickly slides toward the elastic inner kiln cylinder 12, the rod-barrel assembly 2 is switched to the free state, so that the cable 3 releases the slightly deformed elastic inner kiln cylinder 12, forming a synchronous or sequential vibration relationship, expanding the vibration amplitude, extending the single vibration time, and improving the effect of preventing or removing scaling.

[0068] Specifically, in this embodiment, the cylinder 21 includes inner key groove sections 211 and cylindrical sections 212 that are staggered, and the rod 22 includes outer key groove sections 221 and cylindrical sections 222 that are staggered.

[0069] The outer diameter of the outer keyway section 221 is smaller than the inner diameter of the cylindrical section 212, and the length of the outer keyway section 221 is smaller than or equal to the length of the cylindrical section 212;

[0070] The outer diameter of the round rod segment 222 is smaller than the inner diameter of the inner key groove segment 211, and the length of the round rod segment 222 is greater than or equal to the length of the inner key groove segment 211;

[0071] The sum of the lengths of the outer keyway section 221 and the round rod section 222 is equal to the sum of the lengths of the cylinder section 212 and the inner keyway section 211;

[0072] The inner keyway section 211 is provided with a plurality of first strip-shaped limiting protrusions and first strip-shaped limiting grooves which are staggeredly distributed along the circumferential direction of the inner circumferential wall of the cylinder body 21, and the outer keyway section 221 is provided with a plurality of second strip-shaped limiting protrusions and second strip-shaped limiting grooves which are staggeredly distributed along the circumferential direction of the outer circumferential wall of the rod body 22, the first strip-shaped limiting protrusions and the second strip-shaped limiting grooves are matched with each other, and the first strip-shaped limiting grooves are matched with the second strip-shaped limiting protrusions.

[0073] When this embodiment is in use, after the second strip-shaped limiting protrusion of the outer keyway segment 221 slides into the first strip-shaped limiting groove, the rod body 22 and the cylinder body 21 cannot rotate freely relative to each other in the circumferential direction, and the rod-barrel assembly 2 is in a locked state. Similarly, after the second strip-shaped limiting protrusion of the outer keyway segment 221 slides into the cylindrical segment 212, the rod body 22 and the cylinder body 21 can be rod body 22 and cylinder body 21, and the rod-barrel assembly 2 is in a free state.

[0074] Specifically, in this embodiment, if Figure 5 As shown, the longitudinal cross-sectional shape of the first strip-shaped limiting protrusion, the first strip-shaped limiting groove, the second strip-shaped limiting protrusion and the second strip-shaped limiting groove is any one of a rectangle, a fan ring, a triangle and a semicircle. In this embodiment, the longitudinal cross-sectional shape of the first strip-shaped limiting protrusion, the first strip-shaped limiting groove, the second strip-shaped limiting protrusion and the second strip-shaped limiting groove are all fan rings. The technicians can also set them to other shapes such as rectangle, triangle, semicircle, etc., which will not be repeated here.

[0075] Specifically, in this embodiment, the mounting frame assembly 5 includes a fixedly connected connecting frame 51 and a guide rod 52, and a guide cylinder 53 for fixing on a fixed plane or a fixed structure, wherein:

[0076] The connecting frame 51 is fixed to the end of the rod body 22;

[0077] The guide rod 52 and the guide cylinder 53 are both arranged parallel to the central axis direction of the rod body 22, and the guide rod 52 is inserted into the guide cylinder 53 and is slidably connected to the guide cylinder 53 along the axial direction;

[0078] The output end of the hydraulic drive mechanism 6 is fixedly connected to the guide rod 52 or the connecting frame 51. In this embodiment, the hydraulic drive mechanism 6 is a linear hydraulic cylinder. In this embodiment, the guide cylinder 53 is fixed on the ground or the installation platform of the rotary kiln. After the guide rod 52 is inserted into the guide cylinder 53, the guide rod 52 can slide back and forth in the guide cylinder 53 along its axis only when the hydraulic drive structure drives the connecting frame 51.

[0079] In this embodiment, hydraulic drive mechanisms 6 are provided at both ends of the rod body 22 (only one side is shown in the figure).

[0080] Specifically, in this embodiment, if Figure 1 As shown in FIG2 , the connector 13 is staggeredly distributed along the circumference of the kiln tube assembly 1 with the fixed end of the cable 3 fixed to the elastic inner kiln tube 12, so that when the cable 3 pulls the elastic inner kiln tube 12, the deformation amplitude and rebound amplitude of the elastic inner kiln tube 12 are maximized, while avoiding affecting the stable fixation between the elastic inner kiln tube 12 and the rigid outer kiln tube 11.

[0081] Specifically, in this embodiment, Figure 1 and Figure 2As shown, the cable 3 is provided with a limiting body 31 located between the elastic inner kiln cylinder 12 and the rod cylinder assembly 2;

[0082] The material lifting and striking block 4 is located between the limiting body 31 and the elastic inner kiln tube 12 . The limiting block is provided to prevent the material lifting and striking block 4 from impacting the rod tube assembly 2 .

[0083] Specifically, in this embodiment, the limiting body 31 is detachably fixedly connected to the cable 3, and the position of the limiting body 31 on the cable 3 can be adjusted.

[0084] In this embodiment, the longitudinal section of the lifting and striking block 4 is L-shaped, and technicians can set it to a T-shape or other shapes;

[0085] The lifting and striking block 4 is provided with at least two through-type sliding holes 401 arranged side by side and used for installing the cable 3. In this embodiment, Figure 7 As shown, the longitudinal section of the lifting block 4 is L-shaped and is provided with two through-type sliding holes 401 arranged side by side, so that in this embodiment, the same lifting block 4 can be mounted on two cables 3 to prevent the lifting block 4 from tipping over. Especially when a certain amount of material is pushed upward, the material will tip over due to uneven distribution, causing the material to fall rapidly and failing to lift the material.

[0086] Specifically, in this embodiment, Figure 1 and Figure 2 As shown, the lifting and striking block 4 has an angled end which is arranged away from the kiln drum assembly 1, which can drive as much material as possible to move upward, improve the heating uniformity of the material in the kiln drum assembly 1, avoid the poor treatment effect caused by uneven heating, and easy scaling problems.

[0087] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A rotary kiln for a distiller's grains feed production system, characterized in that: It comprises a kiln tube assembly (1), a rod tube assembly (2) arranged in the kiln tube assembly (1), and a plurality of cables (3) evenly distributed along the circumference of the rod tube assembly (2), wherein: The central axis of the rod barrel assembly (2) coincides with the central axis of the kiln barrel assembly (1); One end of the cable (3) is fixedly connected to the inner peripheral wall of the kiln barrel assembly (1), and the other end is fixedly connected to the outer peripheral wall of the rod barrel assembly (2); It also includes a material lifting striking block (4) which is sleeved on the cable (3) and can slide freely on the cable (3); The rod-barrel assembly (2) comprises a barrel (21) and a rod body (22) which are coaxially sleeved. The rod barrel assembly (2) includes two states: State 1: the rod body (22) is in a relatively free state with the cylinder body (21) along the circumferential direction; State 2: the rod body (22) is in a relatively locked state with the cylinder body (21) along the circumferential direction; The kiln tube assembly (1) comprises a rigid outer kiln tube (11) and a deformable elastic inner kiln tube (12), wherein the rigid outer kiln tube (11) is sleeved on the elastic inner kiln tube (12), an annular cavity (14) is provided between the rigid outer kiln tube (11) and the elastic inner kiln tube (12), and a plurality of connectors (13) are distributed along the circumference of the annular cavity (14) and are used to connect the rigid outer kiln tube (11) and the elastic inner kiln tube (12); One end of the pull cable (3) is fixedly connected to the inner peripheral wall of the elastic inner kiln cylinder (12), and the other end is fixedly connected to the outer peripheral wall of the cylinder body (21).

2. The rotary kiln for a distiller's grains feed production system according to claim 1, characterized in that: The rod body (22) is located inside the cylinder body (21) and can slide back and forth along its axial direction inside the cylinder body (21), and both ends of the rod body (22) extend outward from the cylinder body (21); It also includes two sets of mounting frame assemblies (5) for limiting the circumferential rotation of the rod body (22), and a hydraulic drive mechanism (6) for driving the mounting frame assemblies (5) to move back and forth along the axial direction of the kiln barrel assembly (1). The two sets of mounting frame assemblies (5) are respectively fixedly connected to the two ends of the rod body (22).

3. The rotary kiln for the production system of distiller's grains feed according to claim 2, characterized in that: The cylinder (21) comprises inner key groove sections (211) and cylindrical sections (212) which are arranged alternately, and the rod (22) comprises outer key groove sections (221) and cylindrical sections (222) which are arranged alternately. The outer diameter of the outer keyway section (221) is smaller than the inner diameter of the cylindrical section (212), and the length of the outer keyway section (221) is smaller than or equal to the length of the cylindrical section (212); The outer diameter of the round rod segment (222) is smaller than the inner diameter of the inner key groove segment (211), and the length of the round rod segment (222) is greater than or equal to the length of the inner key groove segment (211); The sum of the lengths of the outer key groove section (221) and the round rod section (222) is equal to the sum of the lengths of the cylindrical section (212) and the inner key groove section (211); The inner keyway section (211) is provided with a plurality of first strip-shaped limiting protrusions and first strip-shaped limiting grooves which are staggeredly distributed along the circumferential direction of the inner circumferential wall of the cylinder body (21), and the outer keyway section (221) is provided with a plurality of second strip-shaped limiting protrusions and second strip-shaped limiting grooves which are staggeredly distributed along the circumferential direction of the outer circumferential wall of the rod body (22), the first strip-shaped limiting protrusions and the second strip-shaped limiting grooves being matched with each other, and the first strip-shaped limiting grooves being matched with each other.

4. The rotary kiln for the distiller's grains feed production system according to claim 3, characterized in that: The longitudinal section shape of the first strip-shaped limiting protrusion, the first strip-shaped limiting groove, the second strip-shaped limiting protrusion and the second strip-shaped limiting groove is any one of a rectangular, a sector ring, a triangle and a semicircle.

5. The rotary kiln for the production system of distiller's grains feed according to claim 2, characterized in that: The mounting frame assembly (5) comprises a fixedly connected connecting frame (51) and a guide rod (52), and a guide cylinder (53) for fixing on a fixed plane or a fixed structure, wherein: The connecting frame (51) is fixed to the end of the rod body (22); The guide rod (52) and the guide cylinder (53) are both arranged parallel to the central axis direction of the rod body (22); the guide rod (52) is inserted into the guide cylinder (53) and is slidably connected to the guide cylinder (53) along the axial direction; The output end of the hydraulic drive mechanism (6) is fixedly connected to the guide rod (52) or the connecting frame (51).

6. The rotary kiln for the distiller's grains feed production system according to claim 2, characterized in that: The connectors (13) are distributed in an alternating manner along the circumference of the kiln drum assembly (1) with the fixed ends of the cables (3) fixed to the elastic inner kiln drum (12).

7. The rotary kiln for the production system of distiller's grains feed according to claim 2, characterized in that: The cable (3) is provided with a limiting body (31) located between the elastic inner kiln cylinder (12) and the rod cylinder assembly (2); The material lifting striking block (4) is located between the limiting body (31) and the elastic inner kiln tube (12).

8. The rotary kiln for the distiller's grains feed production system according to claim 7, characterized in that: The limiting body (31) is detachably fixedly connected to the cable (3).

9. The rotary kiln for the distiller's grains feed production system according to claim 1, characterized in that: The lifting and striking block (4) has an L-shaped or T-shaped longitudinal section; The lifting and striking block (4) is provided with at least two through-type sliding holes (401) arranged side by side and used for installing the cable (3).

10. The rotary kiln for the production system of distiller's grains feed according to claim 9, characterized in that: The lifting and striking block (4) has an end with a folded angle which is arranged away from the kiln tube assembly (1).

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