Flexible air-conducting double-cylinder steam dryer

Abstract

The present invention relates to a flexible air-conducting double-cylinder steam dryer, which comprises a frame and a multi-stage cylinder group rotatably mounted on the frame, wherein the multi-stage cylinder group comprises an inner cylinder and an outer cylinder coaxially sleeved on the outside of the inner cylinder, wherein the inner cylinder and the outer cylinder are both cylindrical and coaxially fixed, and heat dissipation pipes are provided on the inner and outer surfaces of the inner cylinder, and a heat dissipation pipe is also provided on the inner surface of the outer cylinder, and a rotary joint is provided at the end of the multi-stage cylinder group, which is used for air intake and water return, and an air intake pipe group for introducing steam and a water return pipe group for discharging condensed water are provided between the rotary joint and the heat dissipation pipe, and the air intake pipe group, the water return pipe group and the air guide pipe group of the present invention are all provided with flexible conduits, and the precision requirements for processing and assembly are relatively low, so the installation is convenient and quick, and the flexible conduits can compensate for uncontrollable variable stress, protect each pipeline and corresponding parts, reduce the failure rate, reduce the maintenance cost, improve the work efficiency, and facilitate the continuous production of the factory.

Description

Technical Field

[0001] The invention relates to the technical field of dryers, and in particular to a flexible air-conducting double-cylinder steam dryer. Background Art

[0002] Drum drying equipment is one of the important equipment used for drying cigarettes, food, materials, flowers and other materials for many years. The existing drum drying equipment can be divided into two types according to the nature of its drying heat source, namely hot air heat exchange dryer and steam heat exchange dryer. Hot air heat exchange dryer generally uses hot air directly into the drum as the drying heat source, that is, the material is turned and scattered in the drum while contacting with the hot air to take away moisture to achieve drying. Since the drying equipment is in a state of feeding and discharging, most of the heat of the hot air may be lost before it is used in the drying process, and the energy consumption is too large, which seriously increases the production cost and causes energy waste. The shortcomings of the hot air heat exchange dryer are more prominent, which leads to the birth of the steam heat exchange dryer. The steam heat exchange dryer By arranging heat dissipation pipes on the inner wall of the drum and passing hot steam into the heat dissipation pipes, the materials are turned and scattered in the drum while contacting with the heat dissipation pipes to achieve drying. However, it is necessary to connect the external steam source to the heat dissipation pipes on the inner wall of the drum. Usually, a rotary joint coaxially installed with the drum is used, and a connecting pipe is directly welded between the rotary joint and the heat dissipation pipe on the inner wall of the drum. Connecting pipes are also directly welded between multi-stage drums to connect steam. This increases the difficulty of processing and assembly. During the rotation of the drum, there will be slight relative movement between the drums and between the drums and the rotary joints. This causes the above-mentioned connecting pipes to be constantly rubbed under the action of alternating stress, so that the connections at both ends are easily damaged, the maintenance cost is high, the maintenance is difficult and the process is complicated, which reduces the production efficiency and is not conducive to continuous production in the factory. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a double-cylinder steam dryer with flexible air conduction.

[0004] The specific contents are as follows: A flexible air-conducting double-cylinder steam dryer, which comprises a frame and a multi-stage cylinder group rollingly mounted on the frame, and is characterized by:

[0005] The multi-stage cylinder group includes an inner cylinder and an outer cylinder coaxially sleeved on the outside of the inner cylinder. The inner cylinder and the outer cylinder are both cylindrical and coaxially fixed. A plurality of first-level heat dissipation tubes A are fixed on the inner wall of the inner cylinder and are evenly distributed along its inner circumference, and each first-level heat dissipation tube A is arranged along the busbar direction of the inner cylinder. The two ends of each first-level heat dissipation tube A are respectively sealed and connected with the first-level collecting tube A and the first-level collecting tube B. A plurality of first-level heat dissipation tubes B are fixed on the outer wall of the inner cylinder and are evenly distributed along its inner circumference, and each first-level heat dissipation tube B is arranged along the busbar direction of the inner cylinder. The two ends of each first-level heat dissipation tube B are respectively sealed and connected with the first-level collecting tube A and the first-level collecting tube B, and the first-level collecting tube A and the first-level collecting tube B are respectively fixed on the inner cylinder. At the corresponding position of the outer cylinder body, a plurality of secondary heat dissipation tubes evenly distributed along the inner circumference thereof are fixed on the inner wall of the outer cylinder body, and each secondary heat dissipation tube is arranged along the generatrix direction of the outer cylinder body, and the two ends of each secondary heat dissipation tube are respectively sealed and connected with the secondary collecting tube A and the secondary collecting tube B, and the secondary collecting tube A and the secondary collecting tube B are respectively fixed on the corresponding positions of the inner wall of the outer cylinder body, the primary collecting tube A and the secondary collecting tube A are located at the same end, and at least three groups of air guide tube groups evenly distributed along the circumferential direction are connected between the primary collecting tube A and the secondary collecting tube, and the air guide tube group includes a first transfer tube fixedly connected to the primary collecting tube A, a second transfer tube fixedly connected to the secondary collecting tube A, and a flexible air guide tube connecting the first transfer tube and the second transfer tube;

[0006] The end of the multi-stage cylinder group is coaxially provided with a rotating joint installed on the frame, and the rotating joint is located at the same end as the first-level collecting pipe B. At least four groups of intake pipe groups evenly distributed in the circumferential direction are connected between the intake pipe of the rotating joint and the first-level collecting pipe B. The intake pipe group includes a third adapter pipe fixedly connected to the intake pipe of the rotating joint, a fourth adapter pipe fixedly connected to the first-level collecting pipe B, and a flexible intake pipe connecting the third adapter pipe and the fourth adapter pipe; the inner end of the return pipe of the rotating joint is fixedly connected to the middle pipe body of the distribution pipe, and two groups of return pipe groups evenly distributed in the circumferential direction are connected between the two ends of the distribution pipe and the second-level collecting pipe B. The return pipe group includes a U-shaped water seal pipe connected to the end of the distribution pipe, a fifth adapter pipe fixedly connected to the second-level collecting pipe B, and a flexible return pipe connecting the U-shaped water seal pipe and the fifth adapter pipe.

[0007] Preferably, the inner cylinder body and the outer cylinder body are coaxially fixed by a plurality of radially arranged long bolts, a plurality of inner connecting holes are evenly distributed along the circumferential direction on the side walls in the middle and at both ends of the inner cylinder body, a plurality of outer connecting holes corresponding to the inner connecting holes are evenly distributed along the circumferential direction on the side walls in the middle and at both ends of the outer cylinder body, the inner connecting holes and the outer connecting holes are both radially opened, and the corresponding inner connecting holes and the outer connecting holes are penetrated by long bolts, the outer ends of the long bolts extend out of the outer connecting holes and the extended parts are fixed with nuts.

[0008] Preferably, a water collecting pipe group is also connected between the fifth adapter pipe and the secondary collecting pipe B. The water collecting pipe group is semicircular and matches the outer cylinder body and is fixed on the outer wall of the outer cylinder body. The water collecting pipe group includes three corresponding parallel monomer tubes. The ends of the three monomer tubes at the same end are fixedly connected to the same sealed connecting short tube. Each connecting short tube is connected to the secondary collecting pipe B through a straight tube that runs through the outer cylinder body, and the fifth adapter pipe is fixedly connected to one of the connecting short tubes in the water collecting pipe group.

[0009] Preferably, the first-level heat dissipation tube A, the first-level heat dissipation tube B, the second-level heat dissipation tube, the second-level collecting tube A, and the second-level collecting tube B are all semicircular tubes buckled on the corresponding cylinder body, and all the semicircular tubes are sealed and fixed to the inner circumferential surface of the corresponding cylinder body, the first-level collecting tube A and the first-level collecting tube B are all circular tubes fixed on the inner cylinder body, and the first-level collecting tube A, the first-level collecting tube B, the second-level collecting tube A, and the second-level collecting tube B are all circular rings connected end to end.

[0010] Preferably, at least two circles of annular rollers are provided on the outer circumferential surface of the outer cylinder body, the frame includes a base frame, a front end cover and a rear end cover, two pairs of rollers are provided on the base frame respectively matching the two annular rollers on the outer cylinder body, the multi-stage cylinder body group is installed on the base frame through the annular rollers on the outer cylinder body and the corresponding tangent to the rollers, and front end covers and rear end covers corresponding to the two ends of the multi-stage cylinder body group are provided at both ends of the base frame respectively, the above-mentioned rotary joint is installed on the front end cover and extends outward, the rear end cover is provided with a total feed port corresponding to the corresponding port of the inner cylinder body, and the rear end cover is provided with a discharge hopper corresponding to the port of the outer cylinder body.

[0011] Preferably, both end surfaces of the inner cylinder body are fixed with annular baffle plates A extending radially inward, the inner cylinder body between the first-level collecting pipe A and the annular baffle plates A at this end is a first-level feeding area, the first-level feeding area is provided with a first-level feeding spiral fixed on the inner surface of the inner cylinder body, the inner cylinder body between the first-level collecting pipe B and the annular baffle plates A at this end is a first-level discharging area, and the inner cylinder body where the first-level discharging area is located is provided with a plurality of first-level discharge ports evenly distributed along the circumferential direction.

[0012] Preferably, an annular baffle B extending radially inward is fixed on the end face of the outer cylinder body at the end where the secondary collecting pipe B is located, and the outer cylinder body between the secondary collecting pipe B and the annular baffle B is a secondary feeding area, which corresponds to being located directly below the primary discharging area. A secondary feeding spiral fixed on the inner surface of the outer cylinder body is provided in the secondary feeding area, and the outer cylinder body outside the secondary collecting pipe A is a secondary discharging area. The outer cylinder body where the secondary discharging area is located is provided with a plurality of secondary discharge ports evenly distributed along the circumferential direction, and the secondary discharge ports correspond to the discharge hopper.

[0013] Preferably, a primary material guide plate is fixed inside the inner cylinder body, and two ends of the primary material guide plate are respectively in contact with the primary collecting pipe A and the primary collecting pipe B, and the primary material guide plate includes a main board body A, and a serrated caulking plate A is covered on the outer arc surface of the main board body A, the main board body A is a spiral plate, and a plurality of caulking plates A arranged at equal intervals along the spiral direction are fixed on the outer arc surface of the main board body A, and a clearance gap A is formed between two adjacent caulking plates A, the spiral axis of the primary material guide plate is colinear with the axis of the inner cylinder body, and the top surfaces of all the caulking plates A are matched and fixed on the inner circumferential surface between two adjacent primary heat dissipation tubes A of the inner cylinder body, and the molding surfaces of all the clearance gaps A are matched and fixed on the outer surfaces of the corresponding primary heat dissipation tubes A.

[0014] Preferably, a secondary material guide plate whose spiral direction is opposite to that of the primary material guide plate is fixed inside the outer cylinder body, and two ends of the secondary material guide plate are respectively in contact with the secondary collecting pipe A and the secondary collecting pipe B, and the secondary material guide plate includes a main board body B, and a serrated caulking plate B on the outer arc surface of the main board body B, the main board body B is a spiral plate body, and a plurality of caulking plates B arranged at equal intervals along the spiral direction are fixed on the outer arc surface of the main board body B, and a clearance gap B is formed between two adjacent caulking plates B, the spiral axis of the secondary material guide plate is colinear with the axis of the outer cylinder body, and the top surfaces of all the caulking plates B are matched and fixed on the inner circumferential surface between two adjacent secondary heat dissipation tubes of the outer cylinder body, and the molding surfaces of all the clearance gaps B are matched and fixed on the outer surfaces of the corresponding secondary heat dissipation tubes.

[0015] Preferably, a first flange is fixed on the connecting end between the first transfer tube and the flexible air guide pipe, and the two first flanges are fixed correspondingly by a first bolt, a second flange is fixed on the connecting end between the second transfer tube and the flexible air guide pipe, and the two second flanges are fixed correspondingly by a second bolt, a third flange is fixed on the connecting end between the third transfer tube and the flexible air inlet pipe, and the two third flanges are fixed correspondingly by a third bolt, a fourth flange is fixed on the connecting end between the fourth transfer tube and the flexible air inlet pipe, and the two fourth flanges are fixed correspondingly by a fourth bolt, a fifth flange is fixed on the connecting end between the distribution pipe and the U-shaped water seal pipe, and the two fifth flanges are fixed correspondingly by a fifth bolt, a sixth flange is fixed on the connecting end between the U-shaped water seal pipe and the flexible water return pipe, and the two sixth flanges are fixed correspondingly by a sixth bolt, a seventh flange is fixed on the connecting end between the flexible water return pipe and the fifth transfer tube, and the two seventh flanges are fixed correspondingly by a seventh bolt.

[0016] Beneficial technical effects of the present invention: The present invention is a flexible air-conducting double-cylinder steam dryer.

[0017] First, flexible pipe bodies are provided in the pipe groups connected between the cylinder bodies and the pipe groups connected between the rotary joint and the cylinder body. Since the flexible pipe body has a relatively large degree of freedom of movement, the position and processing accuracy requirements of the connecting parts at both ends are relatively low, so that the corresponding entire pipe group is more convenient to install, reducing the construction difficulty and improving work efficiency; at the same time, when the cylinder body is inspected and maintained in the later stage, even if the position between the cylinder bodies or between the cylinder body and the rotary joint changes relatively, it will not affect the structure of each pipe group itself and the connection at both ends, reducing the maintenance difficulty and reducing the maintenance cost; furthermore, during the overall rotation of the drum, there will definitely be slight relative movement between the cylinder bodies and between the cylinder body and the rotary joint. When this relative movement occurs, the flexible pipe body in each pipe group will use its flexible pipe body to compensate for the deviation caused by this relative movement, thereby offsetting the variable kneading force caused by this deviation, ensuring the stability of the structure of each pipe group itself and the firmness of the connection at both ends, reducing the failure rate of the equipment, ensuring production efficiency, and facilitating continuous production in the factory.

[0018] Secondly, in the process of condensed water being discharged from the secondary collecting pipe B through the return pipe group from the rotary joint, the storage space of the condensed water is increased by means of the U-shaped water seal pipe and the collecting pipe group, the storage capacity of the condensed water is ensured, the discharge distance and discharge time of the condensed water are extended, the water seal effect on the water vapor in the process of condensed water discharge is increased, and the amount of steam carried out in the process of discharging condensed water is reduced as much as possible, the waste of steam is reduced, the cost is reduced, the energy consumption is reduced, and the drying efficiency of the dryer is improved.

[0019] Third, the guide plates in the two cylinders are provided with caulking plates to fill the gap between the guide plates and the inner wall of the cylinder. Firstly, in the process of rolling forward for drying, the materials will not be entrained or stuck due to the existence of the gap, causing part of the materials to be retained in the cylinder, ensuring that the materials can be pushed out of the cylinder in time under the action of the guide plates, especially edible materials, to avoid the materials that have been retained in the cylinder for a long time from becoming moldy and contaminating other fresh and pure materials, and preventing food safety accidents; secondly, the materials will not be retained in the cylinder due to entrainment or sticking, and different types of materials using the same dryer are avoided from being mixed together, ensuring the quality and purity of the materials, and being responsible for consumers and customers; finally, the caulking plate can be used to directly fix the guide plate and the inner wall of the cylinder, thereby increasing the fixing strength of the guide plate, ensuring the stability of the guide plate, reducing the failure rate, extending its service life, and reducing the damage to the heat pipe when installing the guide plate, as well as reducing the load on the heat pipe and the risk of breaking the heat pipe wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a double-cylinder steam dryer with flexible air conduction;

[0021] Figure 2 for Figure 1 Sectional view in the AA direction;

[0022] Figure 3 for Figure 2 Cross-sectional view in the BB direction;

[0023] Figure 4 for Figure 3 A magnified schematic diagram of middle C;

[0024] Figure 5 The three-dimensional structure diagram of the multi-stage cylinder group Figure 1 ;

[0025] Figure 6 for Figure 5 A magnified schematic diagram of D in the middle;

[0026] Figure 7 The three-dimensional structure diagram of the multi-stage cylinder group Figure 2 ;

[0027] Figure 8 for Figure 7 Middle E is an enlarged schematic diagram;

[0028] Fig. 9 It is a three-dimensional structural schematic diagram of the air intake pipe group installed on the inner cylinder body;

[0029] Fig.10 for Fig. 9 The end face front view of the end where the middle rotary joint is located;

[0030] Fig.11 for Fig.10 Cross-sectional view in the FF direction;

[0031] Fig.12 for Fig.11 A magnified schematic diagram of M in the middle;

[0032] Fig.13 It is a schematic diagram of a three-dimensional structure in which a water return pipe group is installed on an outer cylinder body through a water collecting pipe group;

[0033] Fig.14 for Fig.13 The front view of the end face where the secondary discharge port is located;

[0034] Fig.15 for Fig.14 Cross-sectional view in the middle GG direction;

[0035] Fig.16 for Fig.15 A magnified schematic diagram of H in the middle;

[0036] Fig.17 for Fig.16Sectional view in the II direction;

[0037] Fig.18 for Fig.16 Cross-sectional view in the middle JJ direction;

[0038] Fig.19 It is a schematic diagram of the three-dimensional structure of the water collecting pipe group;

[0039] Fig. 20 Schematic diagram of the three-dimensional structure of the primary guide plate;

[0040] Fig.21 for Fig. 20 A magnified schematic diagram of K in the middle;

[0041] Fig. 22 It is a front view of one end face of the primary guide plate;

[0042] In the figure: 11. inner cylinder, 12. first-level heat dissipation pipe A, 13. first-level collection pipe A, 14. first-level collection pipe B, 15. first-level heat dissipation pipe B, 16. annular baffle A, 17. first-level feeding area, 18. first-level feeding spiral, 19. first-level discharging area, 20. first-level discharge port, 21. first-level guide plate, 22. main body A, 23. caulking plate A, 24. clearance gap A, 25. top surface of caulking plate A, 27. 2. The forming surface of the gap A, 28. The inner connection hole, 29. The outer cylinder, 30. The second-level heat dissipation pipe, 31. The second-level collection pipe A, 32. The second-level collection pipe B, 33. The annular baffle B, 34. The second-level feeding area, 35. The second-level feeding screw, 36. The second-level discharge area, 37. The second-level discharge port, 38. The second-level guide plate, 44. The outer connection hole, 46. The first transfer pipe, 47. The second transfer pipe, 48. The flexible air guide pipe, 4 9. Rotary joint, 50. Inlet pipe of rotary joint, 51. First flange, 52. First bolt, 53. Second flange, 54. Second bolt, 56. Third transfer pipe, 57. Fourth transfer pipe, 58. Flexible inlet pipe, 59. Third flange, 60. Third bolt, 61. Fourth flange, 62. Fourth bolt, 64. U-shaped water seal pipe, 65. Fifth transfer pipe, 66. Flexible return pipe, 67. Distribution pipe, 68. Return pipe of rotary joint, 69. Fifth flange, 70. Fifth bolt, 71. Sixth bolt, 72. Sixth flange, 73. Seventh flange, 74. Seventh bolt, 75. Long bolt, 76. Nut, 78. Monomer pipe, 79. Connecting short pipe, 80. Straight pipe, 81. Annular roller, 82. Base frame, 83. Front cover, 84. Rear cover, 85. Roller, 86. Total feed port, 87. Discharge hopper. DETAILED DESCRIPTION

[0043] Example 1, see Figure 1-22, a flexible air-conducting double-cylinder steam dryer, the dryer comprising a frame, and a multi-stage cylinder group rollingly mounted on the frame;

[0044] The multi-stage cylinder group includes an inner cylinder and an outer cylinder coaxially sleeved on the outside of the inner cylinder. The inner cylinder and the outer cylinder are both cylindrical and coaxially fixed. A plurality of first-level heat dissipation tubes A are fixed on the inner wall of the inner cylinder and are evenly distributed along its inner circumference, and each first-level heat dissipation tube A is arranged along the busbar direction of the inner cylinder. The two ends of each first-level heat dissipation tube A are respectively sealed and connected with the first-level collecting tube A and the first-level collecting tube B. A plurality of first-level heat dissipation tubes B are fixed on the outer wall of the inner cylinder and are evenly distributed along its inner circumference, and each first-level heat dissipation tube B is arranged along the busbar direction of the inner cylinder. The two ends of each first-level heat dissipation tube B are respectively sealed and connected with the first-level collecting tube A and the first-level collecting tube B, and the first-level collecting tube A and the first-level collecting tube B are respectively fixed on the inner cylinder. At the corresponding position of the outer cylinder body, a plurality of secondary heat dissipation tubes evenly distributed along the inner circumference thereof are fixed on the inner wall of the outer cylinder body, and each secondary heat dissipation tube is arranged along the generatrix direction of the outer cylinder body, and the two ends of each secondary heat dissipation tube are respectively sealed and connected with the secondary collecting tube A and the secondary collecting tube B, and the secondary collecting tube A and the secondary collecting tube B are respectively fixed on the corresponding positions of the inner wall of the outer cylinder body, the primary collecting tube A and the secondary collecting tube A are located at the same end, and at least three groups of air guide tube groups evenly distributed along the circumferential direction are connected between the primary collecting tube A and the secondary collecting tube, and the air guide tube group includes a first transfer tube fixedly connected to the primary collecting tube A, a second transfer tube fixedly connected to the secondary collecting tube A, and a flexible air guide tube connecting the first transfer tube and the second transfer tube;

[0045] The ends of the multi-stage cylinder group are coaxially provided with a rotating joint installed on the frame, and the air inlet pipe and the return pipe on the rotating joint can rotate synchronously with the cylinder body to facilitate the introduction of steam and the discharge of condensed water. The rotating joint and the first-level collecting pipe B are located at the same end, and at least four groups of air inlet pipe groups evenly distributed in the circumferential direction are connected between the air inlet pipe of the rotating joint and the first-level collecting pipe B. The air inlet pipe group includes a third adapter pipe fixedly connected to the air inlet pipe of the rotating joint, a fourth adapter pipe fixedly connected to the first-level collecting pipe B, and a flexible air inlet pipe connecting the third adapter pipe and the fourth adapter pipe; the inner end of the return pipe of the rotating joint is fixedly connected to the middle pipe body of the distribution pipe, and two groups of return pipe groups evenly distributed in the circumferential direction are connected between the two ends of the distribution pipe and the second-level collecting pipe B. The return pipe group includes a U-shaped water seal pipe connected to the end of the distribution pipe, a fifth adapter pipe fixedly connected to the second-level collecting pipe B, and a flexible return pipe connecting the U-shaped water seal pipe and the fifth adapter pipe.

[0046] The inner cylinder body and the outer cylinder body are coaxially fixed by a plurality of radially arranged long bolts. A plurality of inner connecting holes are evenly distributed along the circumferential direction on the side walls in the middle and at both ends of the inner cylinder body. A plurality of outer connecting holes corresponding to the inner connecting holes are evenly distributed along the circumferential direction on the side walls in the middle and at both ends of the outer cylinder body. The inner connecting holes and the outer connecting holes are both radially opened. Long bolts are passed through the corresponding inner connecting holes and the outer connecting holes. The outer ends of the long bolts extend out of the outer connecting holes and the extended parts are fixed with nuts. The long bolts facilitate the concentric installation and debugging between the inner cylinder body and the outer cylinder body, which is convenient and flexible.

[0047] A water collecting pipe group is also connected between the fifth transfer pipe and the secondary collecting pipe B. The water collecting pipe group is semicircular and matches the outer cylinder body and is fixed on the outer wall of the outer cylinder body. The water collecting pipe group includes three corresponding parallel monomer tubes. The ends of the same end of the three monomer tubes are fixedly connected to the same sealed connecting short pipe. Each connecting short pipe is connected to the secondary collecting pipe B through a straight pipe that runs through the outer cylinder body, and the fifth transfer pipe is fixedly connected to one of the connecting short pipes in the water collecting pipe group. In the process of condensed water being discharged from the secondary collecting pipe B through the return pipe group from the rotary joint, the storage space of the condensed water is increased by the U-shaped water seal pipe and the water collecting pipe group, the storage amount of the condensed water is guaranteed, the distance and time of the condensed water discharge are extended, the water sealing effect on the water vapor in the process of condensed water discharge is increased, and the amount of steam brought out is reduced as much as possible in the process of discharging the condensed water, the waste of steam is reduced, the cost is reduced, the energy consumption is reduced, and the drying efficiency of the dryer is improved.

[0048] The first-level heat dissipation tube A, the first-level heat dissipation tube B, the second-level heat dissipation tube, the second-level collecting tube A, and the second-level collecting tube B are all semicircular tubes buckled on the corresponding cylinder body, and all the semicircular tubes are sealed and fixed to the inner circumferential surface of the corresponding cylinder body. The first-level collecting tube A and the first-level collecting tube B are all circular tubes fixed on the inner cylinder body, and the first-level collecting tube A, the first-level collecting tube B, the second-level collecting tube A, and the second-level collecting tube B are all circular rings connected end to end.

[0049] At least two circles of annular rollers are provided on the outer circumferential surface of the outer cylinder body, and the frame includes a base frame, a front end cover and a rear end cover. Two pairs of rollers are provided on the base frame, which are matched with the two annular rollers on the outer cylinder body respectively. The multi-stage cylinder body group is installed on the base frame through the annular rollers on the outer cylinder body and the corresponding tangent to the rollers. Front end covers and rear end covers corresponding to the two ends of the multi-stage cylinder body group are provided at both ends of the base frame respectively. The above-mentioned rotary joint is installed on the front end cover and extends outward. The rear end cover is provided with a total feed port corresponding to the corresponding port of the inner cylinder body, and the rear end cover is provided with a discharge hopper corresponding to the port of the outer cylinder body.

[0050] Both end surfaces of the inner cylinder body are fixed with annular baffle plates A extending radially inward. The inner cylinder body between the first-level collecting pipe A and the annular baffle plates A at this end is a first-level feeding area, and a first-level feeding spiral fixed on the inner surface of the inner cylinder body is provided in the first-level feeding area. The inner cylinder body between the first-level collecting pipe B and the annular baffle plates A at this end is a first-level discharging area, and the inner cylinder body where the first-level discharging area is located is provided with a plurality of first-level discharge ports evenly distributed along the circumferential direction.

[0051] An annular baffle B extending radially inward is fixed on the end face of the outer cylinder body at the end where the secondary collecting pipe B is located. The outer cylinder body between the secondary collecting pipe B and the annular baffle B is a secondary feeding area, which is located directly below the primary discharging area. A secondary feeding spiral fixed on the inner surface of the outer cylinder body is provided in the secondary feeding area. The outer cylinder body outside the secondary collecting pipe A is a secondary discharging area. The outer cylinder body where the secondary discharging area is located is provided with a plurality of secondary discharge ports evenly distributed in the circumferential direction, and the secondary discharge ports correspond to the discharge hopper.

[0052] A primary material guide plate is fixed inside the inner cylinder body, and the two ends of the primary material guide plate are in contact with the primary collecting pipe A and the primary collecting pipe B respectively. The primary material guide plate includes a main board body A, and a serrated caulking plate A is covered on the outer arc surface of the main board body A. The main board body A is a spiral plate body, and a plurality of caulking plates A arranged at equal intervals along the spiral direction are fixed on the outer arc surface of the main board body A, and a clearance gap A is formed between two adjacent caulking plates A. The spiral axis of the primary material guide plate is colinear with the axis of the inner cylinder body, and the top surfaces of all the caulking plates A are matched and fixed on the inner circumferential surface between two adjacent primary heat dissipation pipes A of the inner cylinder body, and the molding surfaces of all the clearance gaps A are matched and fixed on the outer surfaces of the corresponding primary heat dissipation pipes A.

[0053] A secondary material guide plate whose spiral direction is opposite to that of the primary material guide plate is fixed inside the outer cylinder body, and the two ends of the secondary material guide plate are respectively in contact with the secondary collecting pipe A and the secondary collecting pipe B. The secondary material guide plate includes a main plate body B, and a caulking plate B with serrated shapes on the outer arc surface of the main plate body B. The main plate body B is a spiral plate body, and a plurality of caulking plates B arranged at equal intervals along the spiral direction are fixed on the outer arc surface of the main plate body B. A clearance gap B is formed between two adjacent caulking plates B. The spiral axis of the secondary material guide plate is colinear with the axis of the outer cylinder body, and the top surfaces of all the caulking plates B are matched and fixed. On the inner circumferential surface between two adjacent secondary heat dissipation tubes of the outer cylinder body, the forming surfaces of all the clearance gaps B are matched and fixed on the outer surfaces of the corresponding secondary heat dissipation tubes. The structures of the secondary guide plate and the primary guide plate are exactly the same, but the sizes are different. Therefore, the attached drawings in the specification only show the specific structure of the primary guide plate; the guide plates are provided with filling plates to fill the gap between the guide plates and the inner wall of the cylinder body, so that the materials will not be entrained or stuck due to the existence of the gap during the rolling and forward drying process, ensuring that the materials can be pushed out of the cylinder body in time under the action of the guide plates to prevent material mixing and deterioration and contamination.

[0054] A first flange is fixed on the connecting end between the first transfer tube and the flexible air guide pipe, and the two first flanges are fixed correspondingly by a first bolt. A second flange is fixed on the connecting end between the second transfer tube and the flexible air guide pipe, and the two second flanges are fixed correspondingly by a second bolt. A third flange is fixed on the connecting end between the third transfer tube and the flexible air inlet pipe, and the two third flanges are fixed correspondingly by a third bolt. A fourth flange is fixed on the connecting end between the fourth transfer tube and the flexible air inlet pipe, and the two fourth flanges are fixed correspondingly by a fourth bolt. A fifth flange is fixed on the connecting end between the distribution pipe and the U-shaped water seal pipe, and the two fifth flanges are fixed correspondingly by a fifth bolt. A sixth flange is fixed on the connecting end between the U-shaped water seal pipe and the flexible water return pipe, and the two sixth flanges are fixed correspondingly by a sixth bolt. A seventh flange is fixed on the connecting end between the flexible water return pipe and the fifth transfer tube, and the two seventh flanges are fixed correspondingly by a seventh bolt. The pipes are connected by bolts and flanges, which is easy to install and disassemble, and convenient for future inspection and maintenance.

[0055] Working process and principle of the present invention:

[0056] The steam source is connected to the rotary joint, and the steam enters the first-level collecting pipe B through the air intake pipe and the air intake pipe group of the rotary joint in turn, and then the steam is dispersed into each first-level heat dissipation pipe A and the first-level heat dissipation pipe B through the first-level collecting pipe B, and then the steam enters the first-level collecting pipe A, and then enters the second-level collecting pipe A through the air guide pipe group, and then dispersed into each second-level heat dissipation pipe. The steam after heat exchange is gradually converted into condensed water, and the condensed water gradually enters the second-level collecting pipe B under the driving action of the steam, and finally enters the return pipe of the rotary joint through the water collecting pipe group and the return pipe group in turn, so as to discharge the condensed water. In the above process, the steam completes the heat exchange through the heat dissipation pipe to heat the inside of the drum; at the same time, the power device drives the outer cylinder body to rotate, and the material to be dried is added to the inside of the inner cylinder body through the total feed port of the rear end cover. The material first enters the primary feeding area of ​​the inner cylinder body, and is pushed into the inner part of the inner cylinder body by the action of the primary feeding screw. The material is gradually pushed forward by the action of the primary guide plate, and the material directly contacts the primary heat dissipation pipe A heated by steam, and then the material is dried. The material is dried while moving forward, and then the material enters the outer cylinder body through the primary discharge port. The material first enters the secondary feeding area of ​​the outer cylinder body, and is pushed into the inner part of the outer cylinder body by the action of the secondary feeding screw. The material is gradually pushed forward by the secondary guide plate, and the material directly contacts the primary heat dissipation pipe B and the secondary heat dissipation pipe heated by steam, and then the material continues to be dried. The material continues to move forward while being dried, and then the material gradually enters the discharge hopper through the secondary discharge port. The material is dried and finally discharged out of the cylinder.

Claims

1. A flexible air-conducting double-cylinder steam dryer, comprising a frame and a multi-stage cylinder group rollingly mounted on the frame, characterized in that: The multi-stage cylinder group includes an inner cylinder and an outer cylinder coaxially sleeved on the outside of the inner cylinder. The inner cylinder and the outer cylinder are both cylindrical and coaxially fixed. A plurality of first-level heat dissipation tubes A are fixed on the inner wall of the inner cylinder and are evenly distributed along its inner circumference, and each first-level heat dissipation tube A is arranged along the busbar direction of the inner cylinder. The two ends of each first-level heat dissipation tube A are respectively sealed and connected with the first-level collecting tube A and the first-level collecting tube B. A plurality of first-level heat dissipation tubes B are fixed on the outer wall of the inner cylinder and are evenly distributed along its inner circumference, and each first-level heat dissipation tube B is arranged along the busbar direction of the inner cylinder. The two ends of each first-level heat dissipation tube B are respectively sealed and connected with the first-level collecting tube A and the first-level collecting tube B, and the first-level collecting tube A and the first-level collecting tube B are respectively fixed on the inner cylinder. At the corresponding position of the outer cylinder body, a plurality of secondary heat dissipation tubes evenly distributed along the inner circumference thereof are fixed on the inner wall of the outer cylinder body, and each secondary heat dissipation tube is arranged along the generatrix direction of the outer cylinder body, and the two ends of each secondary heat dissipation tube are respectively sealed and connected with the secondary collecting tube A and the secondary collecting tube B, and the secondary collecting tube A and the secondary collecting tube B are respectively fixed on the corresponding positions of the inner wall of the outer cylinder body, the primary collecting tube A and the secondary collecting tube A are located at the same end, and at least three groups of air guide tube groups evenly distributed along the circumferential direction are connected between the primary collecting tube A and the secondary collecting tube, and the air guide tube group includes a first transfer tube fixedly connected to the primary collecting tube A, a second transfer tube fixedly connected to the secondary collecting tube A, and a flexible air guide tube connecting the first transfer tube and the second transfer tube; The end of the multi-stage cylinder group is coaxially provided with a rotating joint installed on the frame, the rotating joint and the first-stage collecting pipe B are located at the same end, and at least four groups of intake pipe groups evenly distributed along the circumferential direction are connected between the intake pipe of the rotating joint and the first-stage collecting pipe B, and the intake pipe group includes a third adapter pipe fixedly connected to the intake pipe of the rotating joint, a fourth adapter pipe fixedly connected to the first-stage collecting pipe B, and a flexible intake pipe connecting the third adapter pipe and the fourth adapter pipe; the inner end of the return pipe of the rotating joint is fixedly connected to the middle pipe body of the distribution pipe, and two groups of return pipe groups evenly distributed along the circumferential direction are connected between the two ends of the distribution pipe and the second-stage collecting pipe B, and the return pipe group includes a U-shaped water seal pipe connected to the end of the distribution pipe, a fifth adapter pipe fixedly connected to the second-stage collecting pipe B, and a flexible return pipe connecting the U-shaped water seal pipe and the fifth adapter pipe; A water collecting pipe group is also connected between the fifth transfer pipe and the secondary collecting pipe B. The water collecting pipe group is semicircular and matches the outer cylinder body and is fixed on the outer wall of the outer cylinder body. The water collecting pipe group includes three corresponding parallel monomer tubes. The ends of the same end of the three monomer tubes are fixedly connected to the same sealed short connecting pipe. Each short connecting pipe is connected to the secondary collecting pipe B through a straight pipe that runs through the outer cylinder body. The fifth transfer pipe is fixedly connected to one of the short connecting pipes in the water collecting pipe group. The first-level heat dissipation tube A, the first-level heat dissipation tube B, the second-level heat dissipation tube, the second-level collecting tube A, and the second-level collecting tube B are all semicircular tubes buckled on the corresponding cylinder body, and all the semicircular tubes are sealed and fixed to the inner circumferential surface of the corresponding cylinder body. The first-level collecting tube A and the first-level collecting tube B are all circular tubes fixed on the inner cylinder body, and the first-level collecting tube A, the first-level collecting tube B, the second-level collecting tube A, and the second-level collecting tube B are all circular rings connected end to end.

2. The flexible air-conducting double-cylinder steam dryer according to claim 1 is characterized in that: The inner cylinder body and the outer cylinder body are coaxially fixed by a plurality of radially arranged long bolts. A plurality of inner connecting holes are evenly distributed along the circumferential direction on the side walls in the middle and at both ends of the inner cylinder body. A plurality of outer connecting holes corresponding to the inner connecting holes are evenly distributed along the circumferential direction on the side walls in the middle and at both ends of the outer cylinder body. Both the inner connecting holes and the outer connecting holes are radially opened, and long bolts are passed through the corresponding inner connecting holes and the outer ends of the long bolts extend out of the outer connecting holes and the extended parts are fixed with nuts.

3. The flexible air-conducting double-cylinder steam dryer according to claim 1 is characterized in that: At least two circles of annular rollers are provided on the outer circumferential surface of the outer cylinder body, and the frame includes a base frame, a front end cover and a rear end cover. Two pairs of rollers are provided on the base frame, which are matched with the two annular rollers on the outer cylinder body respectively. The multi-stage cylinder body group is installed on the base frame through the annular rollers on the outer cylinder body and the corresponding tangent to the rollers. Front end covers and rear end covers corresponding to the two ends of the multi-stage cylinder body group are provided at both ends of the base frame respectively. The above-mentioned rotary joint is installed on the front end cover and extends outward. The rear end cover is provided with a total feed port corresponding to the corresponding port of the inner cylinder body, and the rear end cover is provided with a discharge hopper corresponding to the port of the outer cylinder body.

4. The flexible air-conducting double-cylinder steam dryer according to claim 3 is characterized in that: Both end surfaces of the inner cylinder body are fixed with annular baffle plates A extending radially inward. The inner cylinder body between the first-level collecting pipe A and the annular baffle plates A at this end is a first-level feeding area, and a first-level feeding spiral fixed on the inner surface of the inner cylinder body is provided in the first-level feeding area. The inner cylinder body between the first-level collecting pipe B and the annular baffle plates A at this end is a first-level discharging area, and the inner cylinder body where the first-level discharging area is located is provided with a plurality of first-level discharge ports evenly distributed along the circumferential direction.

5. The flexible air-conducting double-cylinder steam dryer according to claim 4 is characterized in that: An annular baffle B extending radially inward is fixed on the end face of the outer cylinder body at the end where the secondary collecting pipe B is located. The outer cylinder body between the secondary collecting pipe B and the annular baffle B is a secondary feeding area, which is located directly below the primary discharging area. A secondary feeding spiral fixed on the inner surface of the outer cylinder body is provided in the secondary feeding area. The outer cylinder body outside the secondary collecting pipe A is a secondary discharging area. The outer cylinder body where the secondary discharging area is located is provided with a plurality of secondary discharge ports evenly distributed in the circumferential direction, and the secondary discharge ports correspond to the discharge hopper.

6. The flexible air-conducting double-cylinder steam dryer according to claim 5 is characterized in that: A primary material guide plate is fixed inside the inner cylinder body, and the two ends of the primary material guide plate are in contact with the primary collecting pipe A and the primary collecting pipe B respectively. The primary material guide plate includes a main board body A, and a serrated caulking plate A is covered on the outer arc surface of the main board body A. The main board body A is a spiral plate body, and a plurality of caulking plates A arranged at equal intervals along the spiral direction are fixed on the outer arc surface of the main board body A, and a clearance gap A is formed between two adjacent caulking plates A. The spiral axis of the primary material guide plate is colinear with the axis of the inner cylinder body, and the top surfaces of all the caulking plates A are matched and fixed on the inner circumferential surface between two adjacent primary heat dissipation pipes A of the inner cylinder body, and the molding surfaces of all the clearance gaps A are matched and fixed on the outer surfaces of the corresponding primary heat dissipation pipes A.

7. The flexible air-conducting double-cylinder steam dryer according to claim 6 is characterized in that: A secondary material guide plate whose spiral direction is opposite to that of the primary material guide plate is fixed inside the outer cylinder body, and the two ends of the secondary material guide plate are respectively in contact with the secondary collecting pipe A and the secondary collecting pipe B. The secondary material guide plate includes a main plate body B, and a caulking plate B with serrated shapes on the outer arc surface of the main plate body B. The main plate body B is a spiral plate body, and a plurality of caulking plates B arranged at equal intervals along the spiral direction are fixed on the outer arc surface of the main plate body B, and a clearance gap B is formed between two adjacent caulking plates B. The spiral axis of the secondary material guide plate is colinear with the axis of the outer cylinder body, and the top surfaces of all the caulking plates B are matched and fixed on the inner circumferential surface between two adjacent secondary heat dissipation pipes of the outer cylinder body, and the molding surfaces of all the clearance gaps B are matched and fixed on the outer surfaces of the corresponding secondary heat dissipation pipes.

8. The flexible air-conducting double-cylinder steam dryer according to claim 1 is characterized in that: A first flange is fixed on the connecting end between the first transfer tube and the flexible air guide pipe, and the two first flanges are fixed correspondingly by a first bolt. A second flange is fixed on the connecting end between the second transfer tube and the flexible air guide pipe, and the two second flanges are fixed correspondingly by a second bolt. A third flange is fixed on the connecting end between the third transfer tube and the flexible air inlet pipe, and the two third flanges are fixed correspondingly by a third bolt. A fourth flange is fixed on the connecting end between the fourth transfer tube and the flexible air inlet pipe, and the two fourth flanges are fixed correspondingly by a fourth bolt. A fifth flange is fixed on the connecting end between the distribution pipe and the U-shaped water seal pipe, and the two fifth flanges are fixed correspondingly by a fifth bolt. A sixth flange is fixed on the connecting end between the U-shaped water seal pipe and the flexible water return pipe, and the two sixth flanges are fixed correspondingly by a sixth bolt. A seventh flange is fixed on the connecting end between the flexible water return pipe and the fifth transfer tube, and the two seventh flanges are fixed correspondingly by a seventh bolt.

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