A method for installing inner furnace tube of internal heating precision ceramic rotary atmosphere furnace

Abstract

The present invention discloses an installation method for an inner furnace tube of an internally heated precision ceramic rotary atmosphere furnace, which relates to the field of ceramic rotary atmosphere furnaces and aims to solve the problem that the inner furnace tube of a traditional ceramic rotary atmosphere furnace is inconvenient to be fixed in a barrel body. The key points of the technical solution are as follows: the invention comprises a placement rack, on which a barrel body is rotatably arranged, the inner furnace tube is detachably arranged in the barrel body, the side wall of the inner furnace tube is sleeved with a heat-insulating layer, the inner wall of the barrel body is provided with a vertical limiting module for limiting the freedom of movement of the inner furnace tube in the vertical direction in the barrel body, and the end face of the barrel body in the length direction is provided with a horizontal limiting module for limiting the freedom of movement of the inner furnace tube in the horizontal direction in the barrel body. The present invention achieves the effect of facilitating the fixing of the inner furnace tube in the barrel body.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic rotary atmosphere furnaces, in particular to an installation method of an inner furnace tube of an inner heating type precision ceramic rotary atmosphere furnace. Background Art

[0002] As we all know, there are many materials in the world today, such as lithium battery materials, activated carbon materials, metal powder materials, catalyst materials, etc. However, no matter what kind of material, if it evolves from raw materials to civil and industrial products, it is inseparable from the process of calcination and sintering. Compared with traditional metallurgical rotary kilns, cement rotary kilns, etc., powder calcination equipment often requires more precision, generally using static and semi-dynamic methods; static calcination equipment is easy to maintain, but there are problems such as insufficient calcination and unstable product quality due to uneven heating of materials; semi-dynamic calcination equipment is easy to fail due to mechanical transmission parts and inconvenient maintenance because it works under high temperature; At present, various chemical powder material industries in my country are developing rapidly, especially with the blowout development of new energy vehicles and electronic consumer products, the demand for battery powder materials, the core of new energy technology, has increased dramatically, especially in the field of lithium-ion batteries, the demand for battery powder materials has increased significantly, and thus, the atmosphere rotary furnace for dynamic sintering of materials has become the mainstream equipment for calcining battery powder materials.

[0003] The existing ceramic rotary atmosphere furnace includes a placing rack, on which a barrel for calcining materials is arranged, an inner furnace tube for placing materials is arranged inside the barrel, and heating modules for heating materials are arranged on the inner and outer walls of the inner furnace tube. A feeding device for feeding materials into the inner furnace tube is arranged at one end of the barrel in the length direction, and a discharging device is arranged at the end of the barrel away from the feeding device. A driving device for driving the barrel to rotate is arranged at the end of the placing rack close to the feeding device. The driving device includes a motor arranged on the placing rack, a driving gear is sleeved on the motor, and a driven rack is arranged on the outer wall of the barrel, and a driving chain is sleeved on the driven rack and the driving gear. The motor can drive the barrel to rotate through the driving chain. In order to enable the barrel to rotate during the placement on the placing rack, a supporting wheel group of the barrel is arranged at both ends in the length direction of the placing rack. In order to facilitate the sliding of materials in the inner furnace tube, the barrel is slightly tilted toward the discharging when it is installed on the placing rack. The device is inclined in direction, and the operator needs to add target material into the inner furnace tube through the feeding device; an exhaust shell is provided at one end of the barrel body in the length direction, an exhaust pipe connected to the inner furnace tube is provided in the exhaust shell, and an exhaust hole connected to the exhaust shell is provided on the part of the exhaust pipe side wall located in the exhaust shell; the exhaust shell is connected to an exhaust pipe at one end away from the barrel body, and an exhaust hole for discharging exhaust gas is provided on the outer wall of the exhaust pipe; the material is calcined in the inner furnace tube through the heating module, and a feeding tube for adding material to the inner furnace tube is provided in the exhaust tube. When the operator needs to calcine the material, he only needs to add the material into the feeding tube, and the material enters the inner furnace tube through the feeding tube. At the same time, the driving device is started to drive the barrel body to rotate. When the material is calcined, it will be discharged from the discharging device, and the exhaust gas in the inner furnace tube can enter the exhaust shell through the exhaust pipe, and the exhaust gas in the exhaust shell can be discharged from the outlet through the exhaust pipe.

[0004] The above-mentioned prior art solutions have the following defects: the existing inner furnace tube is inserted into the barrel body, but during the calcination of the material in the inner furnace tube, the barrel body is constantly rotating, which requires ensuring that the position of the inner furnace tube in the barrel body is fixed. How to fix the inner furnace tube in the barrel body becomes a technical difficulty, and this problem needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide an inner furnace tube installation method for an inner heating precision ceramic rotary atmosphere furnace, which has the function of fixing the inner furnace tube in a barrel body.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for installing an inner furnace tube of an internally heated precision ceramic rotary atmosphere furnace comprises a placement rack, on which a barrel body is rotatably arranged, an inner furnace tube is detachably arranged in the barrel body, a side wall of the inner furnace tube is sleeved with a heat-insulating layer, an inner wall of the barrel body is sleeved with a vertical limit module for limiting the freedom of movement of the inner furnace tube in the vertical direction in the barrel body, and an end face of the barrel body in the length direction is sleeved with a horizontal limit module for limiting the freedom of movement of the inner furnace tube in the horizontal direction in the barrel body; a connecting ring is sleeved on the outer wall of the heat-insulating layer, and the vertical limit module comprises a guide rail arranged on the inner wall of the barrel body, and the guide rail is arranged along the length of the barrel body Direction setting, the guide rail includes a sliding frame fixed to the inner wall of the barrel body, a sliding rod is arranged on the sliding frame, and a sliding block is arranged on the connecting ring and a sliding sleeve is arranged on the sliding rod; the horizontal limit module includes a fixed sleeve fixed on the end face of the barrel body, a connecting sleeve is arranged on the outer rotating sleeve, a fixing cylinder is passed through the connecting ring, and a connecting bolt is matched with the internal thread of the fixing cylinder, a fixing hole is arranged at one end of the connecting sleeve close to the connecting bolt, the fixing hole is arranged opposite to the connecting bolt, and the fixing hole is threadedly sleeved on the connecting bolt, and an operating hole is opened at the position of the outer wall of the barrel body corresponding to the connecting sleeve.

[0008] By adopting the above technical scheme, a sliding rod is arranged in the barrel body, a sliding block is arranged on the outer wall of the inner tube, and the sliding block is sleeved on the sliding rod. The cooperation of the sliding block and the sliding rod can limit the freedom of the inner furnace tube to move left and right in the horizontal direction of the barrel body, and limit the freedom of movement of the inner furnace tube in the vertical direction by the gravity of the inner furnace tube itself. Then, as long as the inner furnace tube is pushed into the barrel body, the inner furnace tube with a larger volume and a heavier weight can be conveniently pushed into the target position in the barrel body, thereby facilitating the installation of the inner furnace tube in the barrel body; a sliding block is arranged on the outer wall of the protective layer, and the sliding block is slidably arranged on the sliding track. The cooperation of the sliding block and the sliding track can limit the freedom of movement of the inner furnace tube in the vertical direction of the barrel body, and then the inner furnace tube and the end face of the barrel body are fixed together by the connecting bolt and the connecting sleeve on the connecting ring, thereby limiting the freedom of movement of the inner furnace tube in the horizontal direction of the barrel body, and then limiting the position of the inner furnace tube in the barrel body.

[0009] Furthermore, a rotating hole is provided on the outer wall of the connecting sleeve at one end close to the inner furnace tube, and the rotating hole is provided along the radial direction of the connecting sleeve, a rotating column is passed through the rotating hole, and holding bolts are threadedly fitted at both ends of the rotating column in the length direction, and the fixing hole is provided along the radial direction of the rotating column, and a guide hole connected to the fixing hole is provided on the end of the connecting sleeve close to the inner furnace tube; a limiting groove is provided on the outer wall of the rotating column, and the limiting groove is provided along the length direction of the rotating column, and a limiting bolt is threadedly fitted on the outer wall of the connecting sleeve, and the limiting bolt extends into one end of the connecting sleeve and slides through the limiting groove.

[0010] By adopting the above technical scheme, the guide hole can facilitate the insertion of the connecting bolt into the fixing hole. Since the inner furnace tube is arranged in the barrel body and the connecting sleeve is arranged on the inner end surface of the barrel body, it is not convenient for the operator to operate the connecting sleeve and the connecting bolt in the barrel body. The operator can reach into the barrel body through the operating hole to rotate the connecting sleeve to fix the connecting bolt in the connecting sleeve. The holding bolt can provide a fulcrum for the connecting sleeve with a smaller diameter. The operator can hold the holding bolt through the operating hole to rotate the connecting sleeve, thereby facilitating the operator to rotate the connecting sleeve; the cooperation of the limit groove and the limit bolt can position the holding bolt in the connecting sleeve.

[0011] Furthermore, the sliding frame is divided into a plurality of divided frames along its length direction, and the sliding rod is divided into a plurality of divided rods corresponding to the divided frames.

[0012] By adopting the above technical solution, compared with an entire longer sliding frame, the overall deformation of the dividing frame is smaller, thereby improving the installation accuracy of the dividing frame in the barrel body. The dividing rod can be used in conjunction with the dividing section to further facilitate the installation of the dividing frame.

[0013] Furthermore, a connecting column is provided at one end of the segmentation rod in the length direction, and a positioning hole for inserting the connecting column is provided at one end of the segmentation rod away from the connecting column.

[0014] By adopting the above technical solution, the setting of the connecting column and the positioning hole can increase the contact area between adjacent splitting rods, thereby improving the connection stability between adjacent splitting rods. The positioning hole and the connecting column can also play a role of mutual guidance, thereby improving the connection accuracy between adjacent splitting rods.

[0015] Furthermore, the inner furnace tube is divided into a plurality of segments along its length direction, and connecting devices are arranged between adjacent segments, and connecting rings are arranged at both ends of the segment in the length direction of the segment, and the connecting device includes connecting holes arranged on the connecting rings, and the connecting holes on the segment are relatively opened, and a connecting tube is passed through any of the connecting holes, and a pre-tightening tube is passed through another of the connecting holes, and a pre-tightening bolt is passed through the pre-tightening tube, and the pre-tightening bolt is threadedly engaged in the connecting tube of the adjacent segment.

[0016] By adopting the above technical scheme, the long cylindrical inner furnace tube is divided into a plurality of segmented sections along its length direction, and then the dispersed segmented sections are connected into a whole through a connecting device. In this way, the expansion amount of a single segmented section due to heat is smaller than the expansion amount generated by an integral inner furnace tube, so the internal stress generated in the segmented section is much smaller than that of the inner furnace tube, thereby preventing the inner tube from being damaged, and further improving the service life of the inner furnace tube; adjacent segmented sections are fixed together by inserting pre-tightening bolts in the pre-tightening tube and the connecting tube, thereby improving the integrity between adjacent segmented sections.

[0017] Furthermore, a pre-tightening hole is provided in the pre-tightening cylinder for the pre-tightening bolt to slide, and a resistance ring plate is provided at one end of the outer wall of the pre-tightening bolt located in the pre-tightening hole, and a pre-tightening spring is provided in the pre-tightening hole, and one end of the pre-tightening spring resists in the pre-tightening hole and the other end resists on the resistance ring plate.

[0018] By adopting the above technical solution, even if the segmentation section can reduce its own expansion, the segmentation section will still expand, and extrusion may occur between adjacent segmentation sections, causing one of the segmentation sections to be damaged. Now, a pre-tightening spring is arranged in the pre-tightening hole, and the abutting ring plate on the pre-tightening bolt abuts against the pre-tightening spring. Once expansion and mutual extrusion occur between adjacent segmentation sections, the expansion amount will be reflected in the movement of the pre-tightening bolt in the pre-tightening hole, and the pre-tightening spring will absorb the expansion amount between adjacent segmentation sections, thereby playing a further role in the inner furnace tube.

[0019] Furthermore, a support frame is provided at one end of the placement rack in the length direction, and a mounting frame is detachably provided on the support frame. A mounting sliding frame is provided on a side of the mounting frame away from the placement rack, and a mounting sliding rod is fixedly provided on the mounting sliding frame, and one end of the mounting sliding rod in the length direction abuts against the end face of the sliding rod.

[0020] By adopting the above technical scheme, the inner furnace tube itself has a large volume and weight, and the space for the inner furnace tube to move in the barrel body is limited. When the inner furnace tube is directly inserted into the barrel body, it is inevitable that the inner furnace tube will collide with the inner wall of the barrel body, which brings great inconvenience to the installation of the inner furnace tube in the barrel body. Now, a support frame is set on the placement frame, and a mounting frame is set on the support frame. A sliding frame for lifting the inner furnace tube is set on the mounting frame, and the inner furnace tube is positioned outside the barrel body. Since the sliding rod and the sliding rod in the barrel body are aligned and connected when they are installed, the operator can adjust the position of the inner furnace tube outside the barrel body. The space outside the barrel body is much larger than the barrel body, which facilitates the operator to adjust the position of the inner furnace tube. Then, the inner furnace tube can be directed into the barrel body by installing the sliding frame and the limiting of the sliding rod, thereby facilitating the operator to install the inner furnace tube into the barrel body.

[0021] Furthermore, a wrapping ring wrapped around the sliding rod is arranged in the sliding block, a sliding groove is provided on the outer side wall of the wrapping ring, and an insertion groove for inserting the sliding groove is provided on the outer side wall of the mounting sliding rod.

[0022] By adopting the above technical solution, the wrapping ring is wrapped on the sliding rod. In order to set the wrapping ring on the sliding rod without letting the wrapping ring fall off the sliding rod, the operator can only open an insertion groove on the outer wall of the installed sliding rod and open a sliding groove on the side wall of the wrapping ring to be inserted into the insertion groove, thereby making it convenient for the operator to put the wrapping ring on the sliding rod.

[0023] In summary, the beneficial technical effects of the present invention are:

[0024] 1. The inner furnace tube, insulation layer, horizontal limit module and vertical limit module are used to fix the position of the inner furnace tube in the barrel;

[0025] 2. The operating hole, holding bolt and rotating column are used to make it convenient for operators to rotate the connecting sleeve in the barrel;

[0026] 3. A support frame, a mounting frame, a mounting sliding frame and a mounting sliding rod are adopted, thereby creating an effect of facilitating the installation of the inner furnace tube in the barrel body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure at the end surface of the barrel body in the present invention;

[0029] Figure 3 It is a schematic diagram of a partial cross-sectional structure of the guide rail in the present invention;

[0030] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0031] Figure 5 for Figure 3 A schematic diagram of the enlarged structure of the middle B part;

[0032] Figure 6 for Figure 5 The enlarged structural diagram of the middle C part;

[0033] Figure 7 for Figure 1 The enlarged structural diagram of the middle D part;

[0034] Figure 8 for Figure 7 The enlarged structural diagram of the middle E part;

[0035] Fig. 9 It is a schematic diagram of the cross-sectional structure of the end of the barrel body of the present invention;

[0036] Fig.10 for Fig. 9 The enlarged structural diagram of the middle F part;

[0037] Fig.11 for Fig.10 A schematic diagram of the enlarged structure of the middle G section;

[0038] Fig.12 for Fig.11A schematic diagram of the enlarged structure of the middle H part;

[0039] Fig.13 It is a schematic diagram of the cross-section result at the rotating column in the connecting sleeve of the present invention;

[0040] Fig.14 It is a schematic diagram of the cross-sectional structure of the middle part of the barrel body in the present invention;

[0041] Fig.15 for Fig.14 The enlarged structural diagram of the middle part I;

[0042] Fig.16 for Fig.15 Schematic diagram of the enlarged structure of the middle J part.

[0043] In the figure, 1, placement rack; 11, barrel body; 2, support rack; 21, mounting rack; 22, mounting sliding rack; 23, mounting sliding rod; 24, wrapping ring; 25, sliding slot; 26, inserting slot; 3, vertical limit module; 31, guide rail; 32, sliding rack; 33, sliding rod; 34, sliding block; 35, dividing rack; 36, dividing rod; 37, connecting column; 38, positioning hole; 4, horizontal limit module; 41, fixing sleeve; 42, connecting sleeve; 43. Fixing cylinder; 44. Connecting bolt; 45. Fixing hole; 46. Operating hole; 5. Inner furnace tube; 51. Insulation layer; 52. Connecting ring; 53. Splitting section; 6. Rotating hole; 61. Rotating column; 62. Holding bolt; 63. Guide hole; 64. Limiting groove; 65. Limiting bolt; 7. Connecting device; 71. Connecting hole; 72. Connecting cylinder; 73. Pre-tightening cylinder; 74. Pre-tightening bolt; 75. Pre-tightening hole; 76. Abutting ring plate; 77. Pre-tightening spring. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0045] Reference Figure 1, which is an inner furnace tube installation method of an internal heating precision ceramic rotary atmosphere furnace disclosed by the present invention, including a placement rack 1, on which a barrel body 11 is rotatably arranged. In order to prevent the outer wall of the barrel body 11 from being directly rubbed by rotation, annular wheel belts are arranged at both ends of the barrel body 11 in the length direction, and a supporting wheel group is arranged at the position of the placement rack 1 corresponding to the wheel belt. At this time, the rotation of the barrel body 11 will be reflected on the wheel belt and the supporting wheel group, thereby playing a role in protecting the barrel body 11. An inner furnace tube 5 for placing materials is arranged in the barrel body 11, and powdered materials are added to the inner furnace tube 5. After the materials in the inner furnace tube 5 are calcined, waste gas will be generated. In order to discharge the waste gas in the barrel body 11, a ring-shaped belt is arranged in the length direction of the barrel body 11. An exhaust shell is provided at one end, and the exhaust shell is connected to an exhaust pipe at one end away from the barrel body 11. An inner furnace pipe 5 for calcining materials is provided in the barrel body 11, and a feeding pipe for feeding materials into the inner furnace pipe 5 is passed through the exhaust pipe, and a discharging pipe is rotatably passed through the feeding pipe. When the operator needs to add materials to the inner furnace pipe 5, he only needs to add materials to the discharging pipe. A driving device for driving the barrel body 11 to rotate is provided at one end of the placement rack 1, and the driving device includes a motor arranged on the placement rack 1, a driving gear is provided on the motor, and a driven rack is provided on the outer wall of the barrel body 11, and a driving chain is provided on the driven rack and the driving gear. The motor can drive the barrel body 11 to rotate through the driving chain.

[0046] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 The barrel body 11 is penetrated by an inner furnace tube 5 for calcining materials, and an outer side wall of the inner furnace tube 5 is sleeved with an insulation layer 51, and connecting rings 52 are sleeved at both ends of the outer side wall of the insulation layer 51 in the length direction. In order to facilitate the movement of the inner furnace tube 5 in the barrel body 11 and to limit the freedom of movement of the inner furnace tube 5 in the vertical direction in the barrel body 11, a vertical limiting module 3 for limiting the freedom of movement of the inner furnace tube 5 is provided on the inner side wall of the barrel body 11. The vertical limiting module 3 includes a guide rail 31 arranged on the inner side wall of the barrel body 11, and the guide rail 31 is arranged along the length direction of the barrel body 11, and the inner furnace tube 5 is slidably arranged on the guide rail 31; the guide rail 31 includes a sliding frame 32 and a sliding rod 33, and the sliding frame 32 is evenly divided into a plurality of dividing frames 35 along the length direction of the barrel body 11, and the sliding rod 33 is divided into a plurality of dividing rods 36 corresponding to the dividing frame 35, and a sliding block 34 is provided at a position corresponding to the dividing rod 36 on the connecting ring 52, and the sliding block 34 is slidably sleeved on the outer side wall of the dividing rod.

[0047] Reference Figure 5 and Figure 6A positioning hole 38 is provided at one end of the split rod 36 in the length direction, and a connecting column 37 is provided at the other end. During the connection process of adjacent split rods 36, the operator can first insert the connecting column 37 into the positioning hole 38. On the one hand, it can play a role in preliminary positioning of the adjacent split rods 36, and on the other hand, it can increase the connection area between the adjacent split rods 36, thereby improving the connection stability between the adjacent split rods 36.

[0048] Reference Figure 7 and Figure 8 A support frame 2 is provided at one end of the placement frame 1 in the length direction, a mounting frame 21 is provided on the support frame 2, a mounting sliding frame 22 is provided on the mounting frame 21, a mounting sliding rod 23 is provided on the side of the mounting sliding frame 22 away from the mounting frame 21, a sliding block 34 is provided at the position of the connecting ring 52 corresponding to the sliding rod 33, and the sliding block 34 is slidably sleeved on the sliding rod 33; one end of the mounting sliding rod 23 in the length direction is aligned with the end face of the sliding rod 33; when the operator needs to install the inner furnace tube 5 in the barrel body 11, he only needs to install the mounting sliding rod 23 on the placement frame 11 first. The inner furnace tube 5 is mounted on the support frame 1, and then the inner furnace tube 5 is mounted on the mounting sliding rod 23, and then the inner furnace tube 5 is pushed onto the sliding rod 33 of the barrel body 11 along the mounting sliding rod 23. When the inner furnace tube 5 in the barrel body 11 is installed, the mounting frame 21 on the support frame 2 can be removed as a whole; a wrapping ring 24 is arranged in the sliding block 34, and a sliding groove 25 is arranged on the side wall of the wrapping ring 24, and an insertion groove 26 is arranged on the outer side wall of the mounting sliding rod 23. When the operator installs the inner furnace tube 5 on the mounting sliding rod 23, he only needs to insert the sliding groove 25 into the insertion groove 26.

[0049] Reference Fig. 9 , Fig.10 and Fig.11 In order to limit the horizontal movement freedom of the inner furnace tube 5 in the barrel body 11, a horizontal limit module 4 is provided on the end face of the barrel body 11 in the length direction. The horizontal limit module 4 includes a fixing sleeve 41 provided on the end face of the barrel body 11 in the length direction. A fixing bolt is inserted into the fixing sleeve 41. The fixing bolt is threadedly engaged with the end face of the barrel body 11. A connecting sleeve 42 is rotatably provided on the outer wall of the fixing sleeve 41.

[0050] An operating hole 46 is opened on the outer wall of the barrel body 11 at a position corresponding to the connecting sleeve 42, a fixing cylinder 43 is passed through the connecting ring 52, a connecting bolt 44 pointing to the connecting sleeve 42 is passed through the fixing cylinder 43, a fixing hole 45 is opened on the connecting sleeve 42 at a position corresponding to the connecting bolt 44, the connecting bolt 44 is threadedly passed through the fixing hole 45, and the operator rotates the connecting sleeve 42 through the operating hole 46 to pass the connecting bolt 44 into the connecting sleeve 42.

[0051] Reference Fig.11 , Fig.12 and Fig.13In order to further facilitate the operator to rotate the connecting sleeve 42, a rotating hole 6 is formed through one end of the connecting sleeve 42 near the connecting bolt 44, and a rotating column 61 is slidably penetrated in the rotating hole 6. The rotating hole 6 is formed along the radial direction of the connecting sleeve 42, and holding bolts 62 extending out of the connecting sleeve 42 are provided at both ends of the rotating column 61 in the length direction. The operator can hold the holding bolts 62 through the operating hole 46, and rotating the holding bolts 62 will drive the connecting sleeve 42 to rotate, thereby facilitating the operator to rotate the connecting sleeve 42, and further fixing the inner furnace tube 5 on the end surface of the barrel body 11; since three connecting sleeves 42 are provided on the end surface of the barrel body 11, Three connecting bolts 44 are arranged on the outer wall of the protective layer, so the operator can only rotate a section of the connecting sleeve 42 each time, and can slowly fix the connecting sleeve 42 on the protective layer; a guide hole 63 is provided at one end of the connecting sleeve 42 close to the connecting bolt 44, and the guide hole 63 is arranged along the radial direction of the connecting sleeve 42. The guide hole 63 can increase the coverage area of ​​the fixing hole 45, and facilitate the insertion of the connecting bolt 44 into the fixing hole 45. The side wall of the connecting sleeve 42 is threadedly matched with the limiting bolt 65, and the side wall of the rotating column 61 is provided with a long limiting groove 64, and the limiting groove 64 is arranged along the radial direction of the connecting sleeve 42, and one end of the limiting bolt 65 inserted into the connecting sleeve 42 is inserted into the limiting groove 64.

[0052] Reference Fig.14 , Fig.15 and Fig.16 The inner furnace tube 5 is evenly divided into a plurality of segmented sections 53 along its length direction. A connecting device 7 is provided between adjacent connecting rings 52. The positions of adjacent segmented sections 53 are connected by the connecting device 7, thereby fixing the positions of adjacent segmented sections 53. The connecting device 7 includes a connecting hole 71 provided in the connecting ring 52 at one end of the segmented section 53 in the length direction. A connecting tube 72 is inserted into the connecting hole 71. A pre-tightening tube 73 is inserted into the connecting hole 71 of the connecting ring 52 at the other end of the segmented section 53 in the length direction. The position where the sections 53 contact each other makes the connecting tube 72 align with the pre-tightening tube 73, and then a pre-tightening bolt 74 is passed through the pre-tightening tube 73 and the connecting tube 72, and a pre-tightening hole 75 is opened at the end of the pre-tightening tube 73 away from the connecting tube 72, and a resistance ring plate 76 is provided at the end of the pre-tightening bolt 74 located in the pre-tightening hole 75, and a pre-tightening spring 77 is passed through the pre-tightening hole 75, and the pre-tightening spring 77 is sleeved on the pre-tightening bolt 74, and one end of the pre-tightening spring 77 resists the inner wall of the pre-tightening hole 75 and the other end resists on the resistance ring plate 76.

[0053] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for installing an inner furnace tube of an internally heated precision ceramic rotary atmosphere furnace, comprising a placement rack (1), a barrel body (11) being rotatably arranged on the placement rack (1), an inner furnace tube (5) being detachably arranged in the barrel body (11), characterized in that: The side wall of the inner furnace tube (5) is provided with a heat-insulating layer (51); the inner side wall of the barrel body (11) is provided with a vertical limit module (3) for limiting the freedom of movement of the inner furnace tube (5) in the vertical direction in the barrel body (11); and the end surface of the barrel body (11) in the longitudinal direction is provided with a horizontal limit module (4) for limiting the freedom of movement of the inner furnace tube (5) in the horizontal direction in the barrel body (11); The outer wall of the thermal insulation layer (51) is sleeved with a connecting ring (52); the vertical limit module (3) comprises a guide rail (31) arranged on the inner wall of the barrel body (11); the guide rail (31) is arranged along the length direction of the barrel body (11); the guide rail (31) comprises a sliding frame (32) fixed to the inner wall of the barrel body (11); a sliding rod (33) is arranged on the sliding frame (32); and a sliding block (34) slidably sleeved on the sliding rod (33) is arranged on the connecting ring (52); The horizontal limit module (4) comprises a fixing sleeve (41) fixed on the end surface of the barrel body (11); a connecting sleeve (42) is rotatably sleeved outside the fixing sleeve (41); a fixing sleeve (43) is inserted into the connecting ring (52); the fixing sleeve (43) is internally threaded with a connecting bolt (44); a fixing hole (45) is provided at one end of the connecting sleeve (42) close to the connecting bolt (44); the fixing hole (45) is arranged opposite to the connecting bolt (44); the fixing hole (45) is threadedly sleeved on the connecting bolt (44); and an operating hole (46) is provided at a position of the outer wall of the barrel body (11) corresponding to the connecting sleeve (42); A rotating hole (6) is provided at one end of the outer wall of the connecting sleeve (42) close to the inner furnace tube (5), the rotating hole (6) is provided along the radial direction of the connecting sleeve (42), a rotating column (61) is inserted into the rotating hole (6), and holding bolts (62) are threadedly engaged at both ends of the rotating column (61) in the length direction, the fixing hole (45) is provided along the radial direction of the rotating column (61), and a guide hole (63) communicating with the fixing hole (45) is provided at one end of the connecting sleeve (42) close to the inner furnace tube (5); The outer wall of the rotating column (61) is provided with a limiting groove (64), and the limiting groove (64) is provided along the length direction of the rotating column (61). The outer wall of the connecting sleeve (42) is threadedly matched with a limiting bolt (65), and one end of the limiting bolt (65) extends into the connecting sleeve (42) and slides through the limiting groove (64). The sliding frame (32) is divided into a plurality of dividing frames (35) along its length direction, and the sliding rod (33) is divided into a plurality of dividing rods (36) corresponding to the dividing frames (35); A connecting column (37) is provided at one end of the dividing rod (36) in the length direction, and a positioning hole (38) for inserting the connecting column (37) is provided at one end of the dividing rod (36) away from the connecting column (37); The inner furnace tube (5) is divided into a plurality of segmented sections (53) along its length direction, and connecting devices (7) are arranged between adjacent segmented sections (53). The connecting rings (52) are arranged at both ends of the segmented sections (53) in the length direction. The connecting device (7) comprises connecting holes (71) arranged on the connecting rings (52), and the positioning holes (38) on the segmented sections (53) are opened opposite to each other. A connecting tube (72) is inserted into any of the connecting holes (71), and a pre-tightening tube (73) is inserted into another of the positioning holes (38). A pre-tightening bolt (74) is inserted into the pre-tightening tube (73), and the pre-tightening bolt (74) is threadedly engaged in the connecting tube (72) of the adjacent segmented section (53). The pre-tightening cylinder (73) is provided with a pre-tightening hole (75) for the pre-tightening bolt (74) to slide, and an abutting ring plate (76) is provided at one end of the outer wall of the pre-tightening bolt (74) located in the pre-tightening hole (75). A pre-tightening spring (77) is provided in the pre-tightening hole (75), and one end of the pre-tightening spring (77) abuts in the pre-tightening hole (75) and the other end abuts on the abutting ring plate (76).

2. The inner furnace tube installation method of the internal heating precision ceramic rotary atmosphere furnace according to claim 1 is characterized in that: A support frame (2) is provided at one end of the placement frame (1) in the length direction, a mounting frame (21) is detachably provided on the support frame (2), a mounting sliding frame (22) is provided on a side of the mounting frame (21) away from the placement frame (1), a mounting sliding rod (23) is fixedly provided on the mounting sliding frame (22), and one end of the mounting sliding rod (23) in the length direction abuts against an end surface of a sliding rod (33).

3. The inner furnace tube installation method of the internal heating precision ceramic rotary atmosphere furnace according to claim 2 is characterized in that: The sliding block (34) is provided with a wrapping ring (24) wrapped around the sliding rod (33), the outer wall of the wrapping ring (24) is provided with a sliding groove (25), and the outer wall of the mounting sliding rod (23) is provided with an insertion groove (26) for the sliding groove (25) to be inserted.

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